SQ48S10012-NS00G_技术文档

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

Features

• “G” option designates RoHS for all six substances;

Standard configurations are RoHS compliant with

Pb solder exemption¹

• Delivers up to 15 A (50 W)

• Industry-standard quarter-brick pinout

• Outputs available in 12.0, 8.0, 6.0, 5.0, 3.3, 2.5, 2.0,

1.8, 1.5, 1.2, and 1.0 V

• Available in through-hole and SMT packages

• Lowest profile in industry: 0.258” (6.55 mm)

• Lowest weight in industry: 0.53 oz (15 g)

• On-board input differential LC-filter

• Startup into pre-biased output

Applications

• No minimum load required

• Telecommunications

• Data communications

• Wireless communications

• Servers

• Meets Basic Insulation requirements of EN60950

• Withstands 100 V input transient for 100 ms

• Fixed frequency operation

• Fully protected

• Remote output sense

• Positive or negative logic ON/OFF option

Benefits

• High efficiency – no heat sink required

• Output voltage trim range: +10%/−20% with

industry-standard trim equations (except 1.2 V and

1.0 V outputs with trim range ±10%)

• For output voltages ranging from 3.3 to 1.0 V, 40%

higher current capability at elevated temperatures

than most competitors' 20-25A quarter-bricks

• High reliability: MTBF = 3.4 million hours, calculated

per Telcordia TR-332, Method I Case 1

• Extremely small footprint: 0.896” x 2.30” (2.06 in²),

40% smaller than conventional quarter-bricks

• UL60950 recognized in US and Canada and

DEMKO certified per IEC/EN60950

• Designed to meet Class B conducted emissions per

FCC and EN55022 when used with external filter

• All materials meet UL94, V-0 flammability rating

Description

The SemiQ™ Family of dc-dc converters provide a high efficiency single output in a size that is only 60% of

industry-standard quarter-bricks, while preserving the same pinout and functionality.

In high temperature environments, for output voltages ranging from 3.3 V to 1.0 V, the thermal performance of

SemiQ™ converters exceeds that of most competitors' 20-25 A quarter-bricks. This performance is accomplished

through the use of patent-pending circuit, packaging, and processing techniques to achieve ultra-high efficiency,

excellent thermal management, and a very low body profile.

Low body profile and the preclusion of heat sinks minimize airflow shadowing, thus enhancing cooling for

downstream devices. The use of 100% automation for assembly, coupled with advanced electronic circuits and

thermal design, results in a product with extremely high reliability.

Operating from a 36-75 V input, the SQ48 Series converters provide any standard output voltage from 12 V down

to 1.0 V. Outputs can be trimmed from –20% to +10% of the nominal output voltage (±10% for output voltages

1.2 V and 1.0 V), thus providing outstanding design flexibility.

With a standard pinout and trim equations, the SQ48 Series converters are perfect drop-in replacements for

existing quarter-brick designs. Inclusion of this converter in new designs can result in significant board space and

cost savings. In both cases the designer can expect reliability improvement over other available converters

because of the SQ48 Series’ optimized thermal efficiency.

¹The solder exemption is for customers choosing to use the exemptions for lead in solders for servers, storage and storage array systems, and

network infrastructure equipment for switching, signaling, transmission, and network management for telecommunications.

REV. SEP 14, 2005

Page 1 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

Electrical Specifications (common for all versions)

Conditions: T_A= 25 ºC, Airflow = 300 LFM (1.5 m/s), Vin = 48 VDC, All output voltages, unless otherwise specified.

Parameter

Notes

Min

Typ

Max

Units

Absolute Maximum Ratings

Input Voltage

Continuous

0

80

85

VDC

°C

Operating Ambient Temperature

Storage Temperature

Input Characteristics

Operating Input Voltage Range

Input Undervoltage Lockout

Turn-on Threshold

-40

-55

125

°C

36

48

75

VDC

Non-latching

100 ms

33

31

34

32

35

33

VDC

Turn-off Threshold

Input Voltage Transient

Isolation Characteristics

I/O Isolation

100

2000

10

VDC

pF

Isolation Capacitance

1.0 - 3.3 V

5.0 - 6.0 V

8.0 - 12 V

160

260

230

pF

Isolation Resistance

Feature Characteristics

Switching Frequency

MΩ

415

kHz

%

Industry-std. equations (1.5 - 12V)

Use trim equation on Page 4 (1.0 -1.2 V)

Percent of V_OUT(NOM)

-20

-10

+10

Output Voltage Trim Range¹

%

Remote Sense Compensation¹

Output Overvoltage Protection

%

Non-latching (1.5 - 12 V)

Non-latching (1.0 - 1.2 V)

Applies to all protection features

See Figs. F, G and H

117

124

122

132

100

4

127

140

%

Auto-Restart Period

ms

Turn-On Time

ON/OFF Control (Positive Logic)

Converter Off (logic low)

Converter On (logic high)

ON/OFF Control (Negative Logic)

Converter Off (logic high)

Converter On (logic low)

-20

2.4

0.8

20

VDC

2.4

-20

20

VDC

0.8

Additional Notes:

1

Vout can be increased up to 10% via the sense leads or up to 10% via the trim function. However, the total output voltage trim from all

sources should not exceed 10% of V_OUT(NOM), in order to ensure specified operation of overvoltage protection circuitry.

REV. SEP 14, 2005

Page 2 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

of ≤ 0.8 V. An external voltage source (±20 V

maximum) may be connected directly to the ON/OFF

input, in which case it must be capable of sourcing or

sinking up to 1 mA depending on the signal polarity.

See the Startup Information section for system timing

waveforms associated with use of the ON/OFF pin.

Operations

Input and Output Impedance

These power converters have been designed to be

stable with no external capacitors when used in low

inductance input and output circuits.

Remote Sense (Pins 5 and 7)

In many applications, the inductance associated with

the distribution from the power source to the input of

the converter can affect the stability of the converter.

The addition of a 33 µF electrolytic capacitor with an

ESR < 1 ꢀ across the input helps to ensure stability

of the converter. In many applications, the user has

to use decoupling capacitance at the load. The

power converter will exhibit stable operation with

external load capacitance up to 1000 µF on 12 V,

2,200 µF on 8.0 V, 10,000 µF on 5.0 – 6.0 V, and

15,000 µF on 3.3 – 1.0 V outputs.

The remote sense feature of the converter

compensates for voltage drops occurring between the

output pins of the converter and the load. The

SENSE(-) (Pin 5) and SENSE(+) (Pin 7) pins should

be connected at the load or at the point where

regulation is required (see Fig. B).

TM

Rw

Family

SemiQ

Vout (+)

100

Vin (+)

ON/OFF

Vin (-)

Converter

SENSE (+)

(Top View)

TRI

M

SENSE (-)

Rload

Additionally, see the EMC section of this data sheet

for discussion of other external components which

may be required for control of conducted emissions.

Vin

10

Vout (-)

Rw

ON/OFF (Pin 2)

Fig. B: Remote sense circuit configuration.

The ON/OFF pin is used to turn the power converter

on or off remotely via a system signal. There are two

remote control options available, positive logic and

negative logic, with both referenced to Vin(-). A

typical connection is shown in Fig. A.

CAUTION

If remote sensing is not utilized, the SENSE(-) pin must be

connected to the Vout(-) pin (Pin 4), and the SENSE(+) pin

must be connected to the Vout(+) pin (Pin 8) to ensure the

converter will regulate at the specified output voltage. If these

connections are not made, the converter will deliver an output

voltage that is slightly higher than the specified data sheet

value.

TM

Family

SemiQ

Vin (+)

ON/OFF

Vin (-)

Vout (+)

SENSE (+)

TRIM

Converter

(Top View)

Rload

Because the sense leads carry minimal current, large

traces on the end-user board are not required.

However, sense traces should be run side by side and

located close to a ground plane to minimize system

noise and ensure optimum performance.

Vin

SENSE (-)

Vout (-)

CONTROL

INPUT

Fig. A: Circuit configuration for ON/OFF function.

When using the remote sense function, the

converter’s output overvoltage protection (OVP)

senses the voltage across Vout(+) and Vout(-), and

not across the sense lines, so the resistance (and

resulting voltage drop) between the output pins of the

converter and the load should be minimized to

prevent unwanted triggering of the OVP.

The positive logic version turns on when the ON/OFF

pin is at a logic high and turns off when at a logic low.

The converter is on when the ON/OFF pin is left

open. See Electrical Specifications for logic high/low

definitions.

The negative logic version turns on when the pin is at

a logic low and turns off when the pin is at a logic

high. The ON/OFF pin can be hardwired directly to

Vin(-) to enable automatic power up of the converter

without the need of an external control signal.

When utilizing the remote sense feature, care must be

taken not to exceed the maximum allowable output

power capability of the converter, which is equal to the

product of the nominal output voltage and the

allowable output current for the given conditions.

The ON/OFF pin is internally pulled up to 5V through

a resistor. A properly debounced mechanical switch,

open collector transistor, or FET can be used to drive

the input of the ON/OFF pin. The device must be

capable of sinking up to 0.2 mA at a low level voltage

When using remote sense, the output voltage at the

converter can be increased by as much as 10%

above the nominal rating in order to maintain the

required voltage across the load. Therefore, the

REV. SEP 14, 2005

Page 3 of 64

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SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

designer must, if necessary, decrease the maximum

current (originally obtained from the derating curves)

by the same percentage to ensure the converter’s

actual output power remains at or below the

maximum allowable output power.

When trimming up, care must be taken not to exceed

the converter‘s maximum allowable output power. See

the previous section for a complete discussion of this

requirement.

To decrease the output voltage (Fig. D), a trim

resistor, R_T-DECR, should be connected between the

TRIM (Pin 6) and SENSE(-) (Pin 5), with a value of:

Output Voltage Adjust /TRIM (Pin 6)

The output voltage can be adjusted up 10% or down

20% for Vout ≥ 1.5 V, and ±10% for Vout = 1.2 V

relative to the rated output voltage by the addition of

an externally connected resistor. For output voltage

3.3 V, trim up to 10% is guaranteed only at

Vin ≥ 40 V, and it is marginal (8% to 10%) at

Vin = 36 V.

511

R

T−DECR

=

− 10.22

− 15

[kꢀ] (1.5 – 12 V)

[kꢀ] (1.2 V)

∆

700

∆

700

− 17

[kꢀ] (1.0 V)

The TRIM pin should be left open if trimming is not

being used. To minimize noise pickup, a 0.1 µF

capacitor is connected internally between the TRIM

and SENSE(-) pins.

| ∆ |

where,

RT−DECR = Required value of trim-down resistor [kꢀ]

and ∆ is defined above.

To increase the output voltage, refer to Fig. C. A trim

resistor, R_T-INCR, should be connected between the

TRIM (Pin 6) and SENSE(+) (Pin 7), with a value of:

Note:

The above equations for calculation of trim resistor values match

those typically used in conventional industry-standard quarter-

bricks and one-eighth bricks (except for 1.2 V and 1.0 V outputs).

5.11(100 + ∆)V^O−NOM− 626

RT−INCR

=

− 10.22

[kꢀ],

Converters with output voltages 1.2 V and 1.0 V are

available with alternative trim feature to provide the

customers with the flexibility of second sourcing.

These converters have a “T” character in the part

number. The trim equations of “T” version of

converters and more information can be found in

Application Note 103.

1.225∆

for 1.5 – 12 V.

84.6

R

T−INCR

=

− 7.2

− 9

[kꢀ] (1.2 V)

[kꢀ] (1.0 V)

∆

120

T−INCR

∆

TM

Family

SemiQ

Vin (+)

ON/OFF

Vin (-)

Vout (+)

SENSE (+)

TRIM

Converter

where,

(Top View)

RT−INCR = Required value of trim-up resistor [kꢀ]

VO−NOM = Nominal value of output voltage [V]

Rload

Vin

R_T-DECR

SENSE (-)

Vout (-)

(V^O-REQ− V^O-NOM)

∆ =

X 100 [%]

V^O-NOM

Fig. D: Configuration for decreasing output voltage.

VO−REQ = Desired (trimmed) output voltage [V].

Trimming/sensing beyond 110% of the rated output

voltage is not an acceptable design practice, as this

condition could cause unwanted triggering of the

output overvoltage protection (OVP) circuit. The

designer should ensure that the difference between

the voltages across the converter’s output pins and its

sense pins does not exceed 10% of V_OUT(NOM), or:

TM

Family

SemiQ

Vin (+)

ON/OFF

Vin (-)

Vout (+)

SENSE (+)

TRIM

Converter

(Top View)

R_T-INCR

Rload

Vin

SENSE (-)

Vout (-)

[V]

[VOUT(+)− VOUT(−)]−[VSENSE(+)− VSENSE(−)] ≤ VO - NOMX10%

This equation is applicable for any condition of output

sensing and/or output trim.

Fig. C: Configuration for increasing output voltage.

REV. SEP 14, 2005

Page 4 of 64

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SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

To comply with safety agencies’ requirements, an

input line fuse must be used external to the converter.

The Table below provides the recommended fuse

rating for use with this family of products.

Protection Features

Input Undervoltage Lockout

Input undervoltage lockout is standard with this

converter. The converter will shut down when the

input voltage drops below a pre-determined voltage.

Output Voltage

3.3 V

12 - 5.0 V, 2.5 V

2.0 - 1.2 V

Fuse Rating

The input voltage must be typically 34 V for the

converter to turn on. Once the converter has been

turned on, it will shut off when the input voltage drops

typically below 32 V. This feature is beneficial in

preventing deep discharging of batteries used in

telecom applications.

4 A

3 A

2 A

All SQ converters are UL approved for a maximum

fuse rating of 15 Amps. To protect a group of

converters with a single fuse, the rating can be

increased from the recommended values above.

Output Overcurrent Protection (OCP)

The converter is protected against overcurrent or

short circuit conditions. Upon sensing an overcurrent

condition, the converter will switch to constant

current operation and thereby begin to reduce output

voltage. When the output voltage drops below 50%

of the nominal value of output voltage, the converter

will shut down (Fig. x.17).

Electromagnetic Compatibility (EMC)

EMC requirements must be met at the end-product

system level, as no specific standards dedicated to

EMC characteristics of board mounted component dc-

dc converters exist. However, Power-One tests its

converters to several system level standards, primary

of which is the more stringent EN55022, Information

Once the converter has shut down, it will attempt to

restart nominally every 100 ms with a typical 1-2%

duty cycle (Fig. x.18). The attempted restart will

continue indefinitely until the overload or short circuit

conditions are removed or the output voltage rises

above 50% of its nominal value.

technology

equipment

-

Radio

disturbance

characteristics - Limits and methods of measurement.

An effective internal LC differential filter significantly

reduces input reflected ripple current, and improves

EMC.

With the addition of a simple external filter (see

Application Note 100), all versions of the SQ48 Series

Once the output current is brought back into its

specified range, the converter automatically exits the

hiccup mode and continues normal operation.

converters pass the requirements of Class

B

conducted emissions per EN55022 and FCC

requirements. Please contact Power-One Applications

Engineering for details of this testing.

Output Overvoltage Protection (OVP)

The converter will shut down if the output voltage

across Vout(+) (Pin 8) and Vout(-) (Pin 4) exceeds

the threshold of the OVP circuitry. The OVP circuitry

contains its own reference, independent of the output

voltage regulation loop. Once the converter has shut

down, it will attempt to restart every 100 ms until the

OVP condition is removed.

Characterization

General Information

The converter has been characterized for many

operational aspects, to include thermal derating

(maximum load current as a function of ambient

temperature and airflow) for vertical and horizontal

Overtemperature Protection (OTP)

mounting,

efficiency,

startup

and

shutdown

The converter will shut down under an

overtemperature condition to protect itself from

overheating caused by operation outside the thermal

derating curves, or operation in abnormal conditions

such as system fan failure. After the converter has

cooled to a safe operating temperature, it will

automatically restart.

parameters, output ripple and noise, transient

response to load step-change, overload, and short

circuit.

The figures are numbered as Fig. x.y, where x

indicates the different output voltages, and

associates with specific plots (y = 1 for the vertical

thermal derating, …). For example, Fig. x.1 will refer

to the vertical thermal derating for all the output

voltages in general.

y

Safety Requirements

The converters meet North American and

International safety regulatory requirements per

UL60950 and EN60950. Basic Insulation is provided

between input and output.

The following pages contain specific plots or

waveforms associated with the converter. Additional

comments for specific data are provided below.

REV. SEP 14, 2005

Page 5 of 64

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SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

Test Conditions

(ii) The nominal rating of the converter (4 A on 12 V,

5.3 A on 8.0 V, 8 A on 6.0 V, 10 A on 5.0 V, and 15 A

on 3.3 – 1.0 V)).

All data presented were taken with the converter

soldered to a test board, specifically a 0.060” thick

printed wiring board (PWB) with four layers. The top

and bottom layers were not metalized. The two inner

layers, comprised of two-ounce copper, were used to

provide traces for connectivity to the converter.

During normal operation, derating curves with

maximum FET temperature less or equal to 120 °C

should not be exceeded. Temperature on the PCB at

thermocouple location shown in Fig. E should not

exceed 118 °C in order to operate inside the derating

curves.

The lack of metalization on the outer layers as well

as the limited thermal connection ensured that heat

transfer from the converter to the PWB was

minimized. This provides a worst-case but consistent

scenario for thermal derating purposes.

Efficiency

Fig. x.5 shows the efficiency vs. load current plot for

ambient temperature of 25 ºC, airflow rate of 300 LFM

(1.5 m/s) with vertical mounting and input voltages of

36 V, 48 V and 72 V. Also, a plot of efficiency vs. load

current, as a function of ambient temperature with

Vin = 48 V, airflow rate of 200 LFM (1 m/s) with

vertical mounting is shown in Fig. x.6.

All measurements requiring airflow were made in the

vertical and horizontal wind tunnel using Infrared (IR)

thermography and thermocouples for thermometry.

Ensuring components on the converter do not

exceed their ratings is important to maintaining high

reliability. If one anticipates operating the converter

at or close to the maximum loads specified in the

derating curves, it is prudent to check actual

Power Dissipation

Fig. x.7 shows the power dissipation vs. load current

plot for Ta = 25 ºC, airflow rate of 300 LFM (1.5 m/s)

with vertical mounting and input voltages of 36 V, 48

V and 72 V. Also, a plot of power dissipation vs. load

current, as a function of ambient temperature with

Vin = 48 V, airflow rate of 200 LFM (1 m/s) with

vertical mounting is shown in Fig. x.8.

operating

temperatures

in

the

application.

Thermographic imaging is preferable; if this capability

is not available, then thermocouples may be used.

The use of AWG #40 gauge thermocouples is

recommended to ensure measurement accuracy.

Careful routing of the thermocouple leads will further

minimize measurement error. Refer to Fig. E for the

optimum measuring thermocouple location.

Startup

Output voltage waveforms, during the turn-on

transient using the ON/OFF pin for full rated load

currents (resistive load) are shown without and with

external load capacitance in Fig. x.9 and Fig. x.10,

respectively.

Ripple and Noise

Fig. x.13 shows the output voltage ripple waveform,

measured at full rated load current with a 10 µF

tantalum and 1 µF ceramic capacitor across the

output. Note that all output voltage waveforms are

measured across a 1 µF ceramic capacitor.

Fig. E: Location of the thermocouple for thermal testing.

Thermal Derating

The input reflected ripple current waveforms are

obtained using the test setup shown in Fig x.14. The

corresponding waveforms are shown in Fig. x.15 and

Fig. x.16.

Load current vs. ambient temperature and airflow

rates are given in Fig. x.1 to Fig. x.4 for through-hole

and surface-mount versions. Ambient temperature

was varied between 25 °C and 85 °C, with airflow

rates from 30 to 500 LFM (0.15 to 2.5 m/s), and

vertical and horizontal converter mounting.

For each set of conditions, the maximum load current

was defined as the lowest of:

(i) The output current at which any FET junction

temperature does not exceed a maximum specified

temperature (120°C) as indicated by the

thermographic image, or

REV. SEP 14, 2005

Page 6 of 64

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SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

VIN

Startup Information (using negative ON/OFF)

Scenario #1: Initial Startup From Bulk Supply

ON/OFF function enabled, converter started via application

of V_IN. See Figure F.

ON/OFF

STATE

OFF

Time

Comments

t₀

ON/OFF pin is ON; system front end power is

toggled on, V_INto converter begins to rise.

V_INcrosses Undervoltage Lockout protection

circuit threshold; converter enabled.

Converter begins to respond to turn-on

command (converter turn-on delay).

ON

t₁

t₂

t₃

V^OUT

Converter V_OUTreaches 100% of nominal value.

t

t⁰

t1 t2

t3

For this example, the total converter startup time (t₃- t₁) is

typically 4 ms.

Fig. F: Startup scenario #1.

Scenario #2: Initial Startup Using ON/OFF Pin

With V_INpreviously powered, converter started via

ON/OFF pin. See Figure G.

VIN

Time

t₀

t₁

Comments

V_INPUTat nominal value.

Arbitrary time when ON/OFF pin is enabled

(converter enabled).

ON/OFF

STATE

t₂

t₃

End of converter turn-on delay.

Converter V_OUTreaches 100% of nominal value.

OFF

ON

For this example, the total converter startup time (t₃- t₁) is

typically 4 ms.

VOUT

Scenario #3: Turn-off and Restart Using ON/OFF Pin

With V_INpreviously powered, converter is disabled and

then enabled via ON/OFF pin. See Figure H.

Time

t₀

Comments

t

t0

t1 t2

t3

V_INand V_OUTare at nominal values; ON/OFF pin

ON.

Fig. G: Startup scenario #2.

t₁

ON/OFF pin arbitrarily disabled; converter output

falls to zero; turn-on inhibit delay period (100 ms

typical) is initiated, and ON/OFF pin action is

internally inhibited.

VIN

t₂

ON/OFF pin is externally re-enabled.

If (t₂- t₁) ≤ 100 ms, external action of

ON/OFF pin is locked out by startup inhibit

timer.

100 ms

ON/OFF

STATE

If (t₂- t₁) > 100 ms, ON/OFF pin action is

internally enabled.

OFF

ON

t₃

Turn-on inhibit delay period ends. If ON/OFF pin

is ON, converter begins turn-on; if off, converter

awaits ON/OFF pin ON signal; see Figure G.

End of converter turn-on delay.

V^OUT

t₄

t₅

Converter V_OUTreaches 100% of nominal value.

For the condition, (t₂- t₁) ≤ 100 ms, the total converter

startup time (t₅- t₂) is typically 104 ms. For (t₂- t₁) > 100 ms,

startup will be typically 4 ms after release of ON/OFF pin.

t

t0

t1

t2

t3 t4

t5

Fig. H: Startup scenario #3.

REV. SEP 14, 2005

Page 7 of 64

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SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

Electrical Specifications: SQ48T/S04120 (12 Volt Out)

Conditions: T_A= 25 ºC, Airflow = 300 LFM (1.5 m/s), Vin = 48 VDC, Vout = 12 VDC, unless otherwise specified.

Parameter

Notes

Min

Typ

Max

Units

Input Characteristics

Maximum Input Current

Input Stand-by Current

Input No Load Current (0 load on the output)

Input Reflected-Ripple Current

Input Voltage Ripple Rejection

4 ADC, 12 VDC Out @ 36 VDC In

Vin = 48 V, converter disabled

Vin = 48 V, converter enabled

25 MHz bandwidth

1.53

ADC

mADC

mA_PK-PK

dB

3

45

6

120 Hz

TBD

Output Characteristics

Output Voltage Set Point (no load)

Output Regulation

Over Line

11.880 12.000 12.120

VDC

±4

±5

mV

VDC

Over Load

Output Voltage Range

Output Ripple and Noise - 25 MHz

bandwidth

External Load Capacitance

Output Current Range

Current Limit Inception

Peak Short-Circuit Current

RMS Short-Circuit Current

Over line, load and temperature¹

Full load + 10 µF tantalum + 1 µF

ceramic

11.820

12.180

80

120

1,000

4

mV_PK-PK

µF

ADC

A

Plus full load (resistive)

0

Non-latching

Non-latching, Short =10 mꢀ.

Non-latching

4.5

5

7.5

5.5

10

4

Arms

Dynamic Response

Load Change 25% of Iout Max, di/dt = 0.1 A/µs Co = 1 µF ceramic

200

mV

di/dt = 5 A/µs Co = 47 µF tantalum + 1 µF ceramic

200

400

mV

µs

Settling Time to 1%

Efficiency

100% Load

50% Load

87.0

%

1

-40 ºC to 85 ºC.

5

4

3

5

4

3

2

1

0

500 LFM (2.5 m/s)

2

1

0

400 LFM (2.0 m/s)

300 LFM (1.5 m/s)

200 LFM (1.0 m/s)

100 LFM (0.5 m/s)

30 LFM (0.15 m/s)

400 LFM (2.0 m/s)

300 LFM (1.5 m/s)

200 LFM (1.0 m/s)

100 LFM (0.5 m/s)

30 LFM (0.15 m/s)

20

30

40

50

60

70

80

90

20

30

40

50

60

70

80

90

Ambient Temperature [°C]

Fig. 12V.1: Available load current vs. ambient air

temperature and airflow rates for SQ48T04120 converter

with D height pins mounted vertically with Vin = 48 V, air

flowing from pin 3 to pin 1, and maximum FET

temperature ≤ 120 °C.

Fig. 12V.2: Available load current vs. ambient air

temperature and airflow rates for SQ48T04120 converter

with D height pins mounted horizontally with Vin = 48 V,

air flowing from pin 3 to pin 1, and maximum FET

temperature ≤ 120 °C.

REV. SEP 14, 2005

Page 8 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

SQ48T/S04120 (12 Volt Out)

5

4

5

4

3

500 LFM (2.5 m/s)

400 LFM (2.0 m/s)

500 LFM (2.5 m/s)

400 LFM (2.0 m/s)

2

300 LFM (1.5 m/s)

200 LFM (1.0 m/s)

100 LFM (0.5 m/s)

300 LFM (1.5 m/s)

200 LFM (1.0 m/s)

100 LFM (0.5 m/s)

1

30 LFM (0.15 m/s)

0

20

30

40

50

60

70

80

90

20

30

40

50

60

70

80

90

Ambient Temperature [°C]

Fig. 12V.4: Available load current vs. ambient air

temperature and airflow rates for SQ48S04120 converter

mounted horizontally with Vin = 48 V, air flowing from pin

3 to pin 1, and maximum FET temperature ≤ 120 °C.

Fig. 12V.3: Available load current vs. ambient air

temperature and airflow rates for SQ48S04120 converter

mounted vertically with Vin = 48 V, air flowing from pin 3

to pin 1, and maximum FET temperature ≤ 120 °C.

0.95

0.90

0.85

0.80

0.95

0.90

0.85

0.80

70 C

55 C

40 C

0.75

72 V

48 V

36 V

0.75

0.70

0.65

0.70

0.65

0

1

2

3

4

5

0

1

2

3

4

5

Load Current [Adc]

Fig. 12V.6: Efficiency vs. load current and ambient

temperature for SQ48T/S04120 converter mounted

vertically with Vin = 48 V and air flowing from pin 3 to pin

1 at a rate of 200 LFM (1.0 m/s).

Fig. 12V.5: Efficiency vs. load current and input voltage for

SQ48T/S04120 converter mounted vertically with air

flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s)

and Ta = 25 °C.

REV. SEP 14, 2005

Page 9 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

SQ48T/S04120 (12 Volt Out)

10.00

8.00

6.00

4.00

2.00

0.00

10.00

8.00

6.00

4.00

72 V

48 V

36 V

70 C

55 C

40 C

2.00

0.00

0

1

2

3

4

5

0

1

2

3

4

5

Load Current [Adc]

Fig. 12V.7: Power dissipation vs. load current and

input voltage for SQ48T/S04120 converter mounted

vertically with air flowing from pin 3 to pin 1 at a rate of

300 LFM (1.5 m/s) and Ta = 25 °C.

Fig. 12V.8: Power dissipation vs. load current and

ambient temperature for SQ48T/S04120 converter

mounted vertically with Vin = 48 V and air flowing from

pin 3 to pin 1 at a rate of 200 LFM (1.0 m/s).

Fig. 12V.9: Turn-on transient at full rated load current

(resistive) with no output capacitor at Vin = 48 V,

triggered via ON/OFF pin. Top trace: ON/OFF signal

(5 V/div.). Bottom trace: output voltage (5 V/div.). Time

scale: 1 ms/div.

Fig. 12V.10: Turn-on transient at full rated load current

(resistive) plus 1,000 µF at Vin = 48 V, triggered via

ON/OFF pin. Top trace: ON/OFF signal (5 V/div.).

Bottom trace: output voltage (5 V/div.). Time scale:

2 ms/div.

REV. SEP 14, 2005

Page 10 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

SQ48T/S04120 (12 Volt Out)

Fig. 12V.11: Output voltage response to load current

step-change (1 A – 2 A – 1 A) at Vin = 48 V. Top trace:

output voltage (200 mV/div.). Bottom trace: load current

(1 A/div.). Current slew rate: 0.1 A/µs. Co = 1 µF

ceramic. Time scale: 0.5 ms/div.

Fig. 12V.12: Output voltage response to load current

step-change (1 A – 2 A – 1 A) at Vin = 48 V. Top trace:

output voltage (200 mV/div.). Bottom trace: load current

(1 A/div.). Current slew rate: 5 A/µs. Co = 47 µF

tantalum + 1 µF ceramic. Time scale: 0.5 ms/div.

i_S

i_C

10 µH

source

inductance

TM

33 µF

ESR <1

electrolytic

capacitor

1 µF

ceramic

capacitor

Family

SemiQ

DC-DC

Converter

Ω

Vout

Vsource

Fig. 12V.13: Output voltage ripple (50 mV/div.) at full

rated load current into a resistive load with Co = 10 µF

tantalum + 1 µF ceramic and Vin = 48 V. Time scale:

1 µs/div.

Fig. 12V.14: Test Setup for measuring input reflected

ripple currents, i_cand i_s.

REV. SEP 14, 2005

Page 11 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

SQ48T/S04120 (12 Volt Out)

Fig. 12V.16: Input reflected ripple current, i_s

(10 mA/div.), measured through 10 µH at the source at

full rated load current and Vin = 48 V. Refer to

Fig. 12V.14 for test setup. Time scale: 1 µs/div.

Fig. 12V.15: Input reflected ripple current, i_c

(100 mA/div.), measured at input terminals at full rated

load current and Vin = 48 V. Refer to Fig. 12V.14 for test

setup. Time scale: 1 µs/div.

15

10

5

0

6

0

1

2

3

4

5

Iout [Adc]

Fig. 12V.18: Load current (top trace,

5 A/div.,

Fig. 12V.17: Output voltage vs. load current showing

current limit point and converter shutdown point. Input

voltage has almost no effect on current limit

characteristic.

20 ms/div.) into a 10 mꢀ short circuit during restart, at

Vin = 48 V. Bottom trace (5 A/div., 1 ms/div.) is an

expansion of the on-time portion of the top trace.

REV. SEP 14, 2005

Page 12 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

Electrical Specifications: SQ48T/S05080 (8.0 Volt Out)

Conditions: T_A= 25 ºC, Airflow = 300 LFM (1.5 m/s), Vin = 48 VDC, Vout = 8.0 VDC, unless otherwise specified.

Parameter

Notes

Min

Typ

Max

Units

Input Characteristics

Maximum Input Current

Input Stand-by Current

Input No Load Current (0 load on the output)

Input Reflected-Ripple Current

Input Voltage Ripple Rejection

5.3 ADC, 8.0 VDC Out @ 36 VDC In

Vin = 48 V, converter disabled

Vin = 48 V, converter enabled

25 MHz bandwidth

1.38

ADC

mADC

mA_PK-PK

dB

3

33

6

120 Hz

TBD

Output Characteristics

Output Voltage Set Point (no load)

Output Regulation

Over Line

7.920

7.880

8.000

8.080

VDC

±4

±10

8.120

mV

VDC

Over Load

Output Voltage Range

Output Ripple and Noise - 25 MHz

bandwidth

External Load Capacitance

Output Current Range

Current Limit Inception

Peak Short-Circuit Current

RMS Short-Circuit Current

Over line, load and temperature¹

Full load + 10 µF tantalum + 1 µF

ceramic

70

100

2,200

5.3

6.75

12

mV_PK-PK

µF

ADC

A

Plus full load (resistive)

0

5.75

Non-latching

Non-latching, Short =10 mꢀ.

Non-latching

6.25

10

4

Arms

Dynamic Response

Load Change 25% of Iout Max, di/dt = 0.1 A/µs Co = 1 µF ceramic

160

mV

di/dt = 5 A/µs Co = 94 µF tantalum + 1 µF ceramic

160

400

mV

µs

Settling Time to 1%

Efficiency

100% Load

50% Load

85.5

87.0

%

1

-40 ºC to 85 ºC.

6

5

4

3

2

1

0

6

5

4

3

2

1

0

500 LFM (2.5 m/s)

400 LFM (2.0 m/s)

300 LFM (1.5 m/s)

200 LFM (1.0 m/s)

100 LFM (0.5 m/s)

30 LFM (0.15 m/s)

500 LFM (2.5 m/s)

400 LFM (2.0 m/s)

300 LFM (1.5 m/s)

200 LFM (1.0 m/s)

100 LFM (0.5 m/s)

30 LFM (0.15 m/s)

20

30

40

50

60

70

80

90

20

30

40

50

60

70

80

90

Ambient Temperature [°C]

Fig. 8.0V.1: Available load current vs. ambient air

temperature and airflow rates for SQ48T05080 converter

with D height pins mounted vertically with Vin = 48 V, air

flowing from pin 3 to pin 1, and maximum FET

temperature ≤ 120 °C.

Fig. 8.0V.2: Available load current vs. ambient air

temperature and airflow rates for SQ48T05080 converter

with D height pins mounted horizontally with Vin = 48 V,

air flowing from pin 3 to pin 1, and maximum FET

temperature ≤ 120 °C.

REV. SEP 14, 2005

Page 13 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

SQ48T/S05080 (8.0 Volt Out)

6

5

4

3

6

5

4

3

500 LFM (2.5 m/s)

400 LFM (2.0 m/s)

500 LFM (2.5 m/s)

400 LFM (2.0 m/s)

2

1

0

300 LFM (1.5 m/s)

200 LFM (1.0 m/s)

100 LFM (0.5 m/s)

30 LFM (0.15 m/s)

2

1

0

300 LFM (1.5 m/s)

200 LFM (1.0 m/s)

100 LFM (0.5 m/s)

30 LFM (0.15 m/s)

20

30

40

50

60

70

80

90

20

30

40

50

60

70

80

90

Ambient Temperature [°C]

Fig. 8.0V.4: Available load current vs. ambient air

temperature and airflow rates for SQ48S05080 converter

mounted horizontally with Vin = 48 V, air flowing from pin

3 to pin 1, and maximum FET temperature ≤ 120 °C.

Fig. 8.0V.3: Available load current vs. ambient air

temperature and airflow rates for SQ48S05080 converter

mounted vertically with Vin = 48 V, air flowing from pin 3

to pin 1, and maximum FET temperature ≤ 120 °C.

0.95

0.90

0.85

0.80

0.95

0.90

0.85

0.80

70 C

55 C

40 C

0.75

72 V

48 V

36 V

0.75

0.70

0.65

0.70

0.65

0

1

2

3

4

5

6

0

1

2

3

4

5

6

Load Current [Adc]

Fig. 8.0V.6: Efficiency vs. load current and ambient

temperature for SQ48T/S05080 converter mounted

vertically with Vin = 48 V and air flowing from pin 3 to pin

1 at a rate of 200 LFM (1.0 m/s).

Fig. 8.0V.5: Efficiency vs. load current and input voltage

for SQ48T/S05080 converter mounted vertically with air

flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s)

and Ta = 25 °C.

REV. SEP 14, 2005

Page 14 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

SQ48T/S05080 (8.0 Volt Out)

10.00

8.00

6.00

4.00

2.00

0.00

10.00

8.00

6.00

4.00

72 V

48 V

36 V

70 C

55 C

40 C

2.00

0.00

0

1

2

3

4

5

6

0

1

2

3

4

5

6

Load Current [Adc]

Fig. 8.0V.7: Power dissipation vs. load current and

input voltage for SQ48T/S05080 converter mounted

vertically with air flowing from pin 3 to pin 1 at a rate of

300 LFM (1.5 m/s) and Ta = 25 °C.

Fig. 8.0V.8: Power dissipation vs. load current and

ambient temperature for SQ48T/S05080 converter

mounted vertically with Vin = 48 V and air flowing from

pin 3 to pin 1 at a rate of 200 LFM (1.0 m/s).

Fig. 8.0V.10: Turn-on transient at full rated load

current (resistive) plus 2,200 µF at Vin = 48 V,

triggered via ON/OFF pin. Top trace: ON/OFF signal

(5 V/div.). Bottom trace: output voltage (2 V/div.). Time

scale: 2 ms/div.

Fig. 8.0V.9: Turn-on transient at full rated load current

(resistive) with no output capacitor at Vin = 48 V,

triggered via ON/OFF pin. Top trace: ON/OFF signal

(5 V/div.). Bottom trace: output voltage (2 V/div.). Time

scale: 1 ms/div.

REV. SEP 14, 2005

Page 15 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

SQ48T/S05080 (8.0 Volt Out)

Fig. 8.0V.11: Output voltage response to load current

step-change (1.325 A – 2.65 A – 1.325 A) at Vin = 48 V.

Top trace: output voltage (200 mV/div.). Bottom trace:

load current (1 A/div.). Current slew rate: 0.1 A/µs.

Co = 1 µF ceramic. Time scale: 0.5 ms/div.

Fig. 8.0V.12: Output voltage response to load current

step-change (1.325 A – 2.65 A – 1.325 A) at Vin = 48 V.

Top trace: output voltage (200 mV/div.). Bottom trace:

load current (1 A/div.). Current slew rate: 5 A/µs.

Co = 94 µF tantalum + 1 µF ceramic. Time scale:

0.5 ms/div.

i_S

i_C

10 µH

source

inductance

TM

33 µF

ESR <1

electrolytic

capacitor

1 µF

ceramic

capacitor

Family

SemiQ

DC-DC

Converter

Ω

Vout

Vsource

Fig. 8.0V.13: Output voltage ripple (50 mV/div.) at full

rated load current into a resistive load with Co = 10 µF

tantalum + 1 µF ceramic and Vin = 48 V. Time scale:

1 µs/div.

Fig. 8.0V.14: Test Setup for measuring input reflected

ripple currents, i_cand i_s.

REV. SEP 14, 2005

Page 16 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

SQ48T/S05080 (8.0 Volt Out)

Fig. 8.0V.16: Input reflected ripple current, i_s

(10 mA/div.), measured through 10 µH at the source at

full rated load current and Vin = 48 V. Refer to

Fig. 8.0V.14 for test setup. Time scale: 1 µs/div.

Fig. 8.0V.15: Input reflected ripple current, i_c

(100 mA/div.), measured at input terminals at full rated

load current and Vin = 48 V. Refer to Fig. 8.0V.14 for

test setup. Time scale: 1 µs/div.

12

8

4

0

8

0

2

4

6

Iout [Adc]

Fig. 8.0V.18: Load current (top trace,

5 A/div.,

Fig. 8.0V.17: Output voltage vs. load current showing

current limit point and converter shutdown point. Input

voltage has almost no effect on current limit

characteristic.

20 ms/div.) into a 10 mꢀ short circuit during restart, at

Vin = 48 V. Bottom trace (5 A/div., 1 ms/div.) is an

expansion of the on-time portion of the top trace.

REV. SEP 14, 2005

Page 17 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

Electrical Specifications: SQ48T/S08060 (6.0 Volt Out)

Conditions: T_A= 25 ºC, Airflow = 300 LFM (1.5 m/s), Vin = 48 VDC, Vout = 6.0 VDC, unless otherwise specified.

Parameter

Notes

Min

Typ

Max

Units

Input Characteristics

Maximum Input Current

Input Stand-by Current

Input No Load Current (0 load on the output)

Input Reflected-Ripple Current

Input Voltage Ripple Rejection

8 ADC, 6.0 VDC Out @ 36 VDC In

Vin = 48 V, converter disabled

Vin = 48 V, converter enabled

25 MHz bandwidth

1.5

ADC

mADC

mA_PK-PK

dB

3

45

6

120 Hz

TBD

Output Characteristics

Output Voltage Set Point (no load)

Output Regulation

Over Line

5.940

5.910

6.000

6.060

VDC

±2

±5

6.090

mV

VDC

Over Load

Output Voltage Range

Output Ripple and Noise - 25 MHz

bandwidth

External Load Capacitance

Output Current Range

Current Limit Inception

Peak Short-Circuit Current

RMS Short-Circuit Current

Over line, load and temperature¹

Full load + 10 µF tantalum + 1 µF

ceramic

45

60

10,000

8

11.5

25

mV_PK-PK

µF

ADC

A

Plus full load (resistive)

0

8.4

Non-latching

Non-latching, Short =10 mꢀ.

Non-latching

10

15

5.3

Arms

Dynamic Response

Load Change 25% of Iout Max, di/dt = 0.1 A/µs Co = 1 µF ceramic

100

mV

di/dt = 5 A/µs Co = 450 µF tantalum + 1 µF ceramic

80

200

mV

µs

Settling Time to 1%

Efficiency

100% Load

50% Load

89.0

%

¹-40 ºC to 85 ºC.

10

8

10

8

6

500 LFM (2.5 m/s)

4

2

0

4

400 LFM (2.0 m/s)

300 LFM (1.5 m/s)

200 LFM (1.0 m/s)

100 LFM (0.5 m/s)

30 LFM (0.15 m/s)

400 LFM (2.0 m/s)

300 LFM (1.5 m/s)

200 LFM (1.0 m/s)

100 LFM (0.5 m/s)

30 LFM (0.15 m/s)

2

0

20

30

40

50

60

70

80

90

20

30

40

50

60

70

80

90

Ambient Temperature [°C]

Fig. 6.0V.1: Available load current vs. ambient air

temperature and airflow rates for SQ48T08060 converter

with D height pins mounted vertically with Vin = 48 V, air

flowing from pin 3 to pin 1, and maximum FET

temperature ≤ 120 °C.

Fig. 6.0V.2: Available load current vs. ambient air

temperature and airflow rates for SQ48T08060 converter

with D height pins mounted horizontally with Vin = 48 V,

air flowing from pin 3 to pin 1, and maximum FET

temperature ≤ 120 °C.

REV. SEP 14, 2005

Page 18 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

SQ48T/S08060 (6.0 Volt Out)

10

8

10

8

6

500 LFM (2.5 m/s)

400 LFM (2.0 m/s)

300 LFM (1.5 m/s)

200 LFM (1.0 m/s)

100 LFM (0.5 m/s)

500 LFM (2.5 m/s)

400 LFM (2.0 m/s)

300 LFM (1.5 m/s)

200 LFM (1.0 m/s)

100 LFM (0.5 m/s)

4

2

30 LFM (0.15 m/s)

0

20

30

40

50

60

70

80

90

20

30

40

50

60

70

80

90

Ambient Temperature [°C]

Fig. 6.0V.4: Available load current vs. ambient air

temperature and airflow rates for SQ48S08060 converter

mounted horizontally with Vin = 48 V, air flowing from pin

3 to pin 1, and maximum FET temperature ≤ 120 °C.

Fig. 6.0V.3: Available load current vs. ambient air

temperature and airflow rates for SQ48S08060 converter

mounted vertically with Vin = 48 V, air flowing from pin 3

to pin 1, and maximum FET temperature ≤ 120 °C.

0.95

0.90

0.85

0.80

0.95

0.90

0.85

0.80

70 C

55 C

40 C

0.75

72 V

48 V

36 V

0.75

0.70

0.65

0.70

0.65

0

2

4

6

8

10

0

2

4

6

8

10

Load Current [Adc]

Fig. 6.0V.6: Efficiency vs. load current and ambient

temperature for SQ48T/S08060 converter mounted

vertically with Vin = 48 V and air flowing from pin 3 to pin

1 at a rate of 200 LFM (1.0 m/s).

Fig. 6.0V.5: Efficiency vs. load current and input voltage for

SQ48T/S08060 converter mounted vertically with air

flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s)

and Ta = 25 °C.

REV. SEP 14, 2005

Page 19 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

SQ48T/S08060 (6.0 Volt Out)

8.00

6.00

4.00

2.00

0.00

8.00

6.00

4.00

72 V

48 V

36 V

70 C

55 C

40 C

2.00

0.00

0

2

4

6

8

10

0

2

4

6

8

10

Load Current [Adc]

Fig. 6.0V.7: Power dissipation vs. load current and

input voltage for SQ48T/S08060 converter mounted

vertically with air flowing from pin 3 to pin 1 at a rate of

300 LFM (1.5 m/s) and Ta = 25 °C.

Fig. 6.0V.8: Power dissipation vs. load current and

ambient temperature for SQ48T/S08060 converter

mounted vertically with Vin = 48 V and air flowing from

pin 3 to pin 1 at a rate of 200 LFM (1.0 m/s).

Fig. 6.0V.9: Turn-on transient at full rated load current

(resistive) with no output capacitor at Vin = 48 V,

triggered via ON/OFF pin. Top trace: ON/OFF signal

(5 V/div.). Bottom trace: output voltage (2 V/div.). Time

scale: 2 ms/div.

Fig. 6.0V.10: Turn-on transient at full rated load

current (resistive) plus 10,000 µF at Vin = 48 V,

triggered via ON/OFF pin. Top trace: ON/OFF signal

(5 V/div.). Bottom trace: output voltage (2 V/div.). Time

scale: 5 ms/div.

REV. SEP 14, 2005

Page 20 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

SQ48T/S08060 (6.0 Volt Out)

Fig. 6.0V.11: Output voltage response to load current

step-change (2 A – 4 A – 2 A) at Vin = 48 V. Top trace:

output voltage (100 mV/div.). Bottom trace: load current

(2 A/div.). Current slew rate: 0.1 A/µs. Co = 1 µF

ceramic. Time scale: 0.2 ms/div.

Fig. 6.0V.12: Output voltage response to load current

step-change (2 A – 4 A – 2 A) at Vin = 48 V. Top trace:

output voltage (100 mV/div.). Bottom trace: load current

(2 A/div.). Current slew rate: 5 A/µs. Co = 450 µF

tantalum + 1 µF ceramic. Time scale: 0.2 ms/div.

i_S

i_C

10 µH

source

inductance

TM

33 µF

ESR <1

electrolytic

capacitor

1 µF

ceramic

capacitor

Family

SemiQ

DC-DC

Converter

Ω

Vout

Vsource

Fig. 6.0V.13: Output voltage ripple (50 mV/div.) at full

rated load current into a resistive load with Co = 10 µF

tantalum + 1 µF ceramic and Vin = 48 V. Time scale:

1 µs/div.

Fig. 6.0V.14: Test Setup for measuring input reflected

ripple currents, i_cand i_s.

REV. SEP 14, 2005

Page 21 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

SQ48T/S08060 (6.0 Volt Out)

Fig. 6.0V.16: Input reflected ripple current, i_s

(10 mA/div.), measured through 10 µH at the source at

full rated load current and Vin = 48 V. Refer to

Fig. 6.0V.14 for test setup. Time scale: 1 µs/div.

Fig. 6.0V.15: Input reflected ripple current, i_c

(100 mA/div.), measured at input terminals at full rated

load current and Vin = 48 V. Refer to Fig. 6.0V.14 for

test setup. Time scale: 1 µs/div.

8

6

4

2

0

12

0

3

6

9

Iout [Adc]

Fig. 6.0V.18: Load current (top trace, 10 A/div.,

20 ms/div.) into a 10 mꢀ short circuit during restart, at

Vin = 48 V. Bottom trace (10 A/div., 1 ms/div.) is an

expansion of the on-time portion of the top trace.

Fig. 6.0V.17: Output voltage vs. load current showing

current limit point and converter shutdown point. Input

voltage has almost no effect on current limit

characteristic.

REV. SEP 14, 2005

Page 22 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

Electrical Specifications: SQ48T/S10050 (5.0 Volt Out)

Conditions: T_A= 25 ºC, Airflow = 300 LFM (1.5 m/s), Vin = 48 VDC, Vout = 5.0 VDC, unless otherwise specified.

Parameter

Notes

Min

Typ

Max

Units

Input Characteristics

Maximum Input Current

Input Stand-by Current

Input No Load Current (0 load on the output)

Input Reflected-Ripple Current

Input Voltage Ripple Rejection

10 ADC, 5.0 VDC Out @ 36 VDC In

Vin = 48 V, converter disabled

Vin = 48 V, converter enabled

25 MHz bandwidth

1.65

ADC

mADC

mA_PK-PK

dB

2.6

40

6

120 Hz

TBD

Output Characteristics

Output Voltage Set Point (no load)

Output Regulation

Over Line

4.950

4.925

5.000

5.050

VDC

±2

±5

5.075

mV

VDC

Over Load

Output Voltage Range

Output Ripple and Noise - 25 MHz

bandwidth

External Load Capacitance

Output Current Range

Current Limit Inception

Peak Short-Circuit Current

RMS Short-Circuit Current

Over line, load and temperature¹

Full load + 10 µF tantalum + 1 µF

ceramic

45

80

10,000

10

14

30

mV_PK-PK

µF

ADC

A

Plus full load (resistive)

0

10.5

Non-latching

Non-latching, Short =10 mꢀ.

Non-latching

12.5

20

5.3

Arms

Dynamic Response

Load Change 25% of Iout Max, di/dt = 0.1 A/µs Co = 1 µF ceramic

200

mV

di/dt = 5 A/µs Co = 450 µF tantalum + 1 µF ceramic

180

400

mV

µs

Settling Time to 1%

Efficiency

100% Load

50% Load

87.0

88.0

%

¹-40 ºC to 85 ºC.

12

10

8

12

10

8

6

500 LFM (2.5 m/s)

400 LFM (2.0 m/s)

300 LFM (1.5 m/s)

200 LFM (1.0 m/s)

100 LFM (0.5 m/s)

30 LFM (0.15 m/s)

400 LFM (2.0 m/s)

300 LFM (1.5 m/s)

200 LFM (1.0 m/s)

100 LFM (0.5 m/s)

30 LFM (0.15 m/s)

4

2

0

4

2

0

20

30

40

50

60

70

80

90

20

30

40

50

60

70

80

90

Ambient Temperature [°C]

Fig. 5.0V.1: Available load current vs. ambient air

temperature and airflow rates for SQ48T10050 converter

with D height pins mounted vertically with Vin = 48 V, air

flowing from pin 3 to pin 1, and maximum FET

temperature ≤ 120 °C.

Fig. 5.0V.2: Available load current vs. ambient air

temperature and airflow rates for SQ48T10050 converter

with D height pins mounted horizontally with Vin = 48 V,

air flowing from pin 3 to pin 1, and maximum FET

temperature ≤ 120 °C.

REV. SEP 14, 2005

Page 23 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

SQ48T/S10050 (5.0 Volt Out)

12

10

8

12

10

8

6

500 LFM (2.5 m/s)

400 LFM (2.0 m/s)

500 LFM (2.5 m/s)

400 LFM (2.0 m/s)

4

2

0

300 LFM (1.5 m/s)

200 LFM (1.0 m/s)

100 LFM (0.5 m/s)

30 LFM (0.15 m/s)

4

2

0

300 LFM (1.5 m/s)

200 LFM (1.0 m/s)

100 LFM (0.5 m/s)

30 LFM (0.15 m/s)

20

30

40

50

60

70

80

90

20

30

40

50

60

70

80

90

Ambient Temperature [°C]

Fig. 5.0V.4: Available load current vs. ambient air

temperature and airflow rates for SQ48S10050 converter

mounted horizontally with Vin = 48 V, air flowing from pin

3 to pin 1, and maximum FET temperature ≤ 120 °C.

Fig. 5.0V.3: Available load current vs. ambient air

temperature and airflow rates for SQ48S10050 converter

mounted vertically with Vin = 48 V, air flowing from pin 3

to pin 1, and maximum FET temperature ≤ 120 °C.

0.95

0.90

0.85

0.80

0.95

0.90

0.85

0.80

70 C

55 C

40 C

0.75

72 V

48 V

36 V

0.75

0.70

0.65

0.70

0.65

0

2

4

6

8

10

12

0

2

4

6

8

10

12

Load Current [Adc]

Fig. 5.0V.6: Efficiency vs. load current and ambient

temperature for SQ48T/S10050 converter mounted

vertically with Vin = 48 V and air flowing from pin 3 to pin

1 at a rate of 200 LFM (1.0 m/s).

Fig. 5.0V.5: Efficiency vs. load current and input voltage for

SQ48T/S10050 converter mounted vertically with air

flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s)

and Ta = 25 °C.

REV. SEP 14, 2005

Page 24 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

SQ48T/S10050 (5.0 Volt Out)

10.00

8.00

6.00

4.00

2.00

0.00

10.00

8.00

6.00

4.00

72 V

48 V

36 V

70 C

55 C

40 C

2.00

0.00

0

2

4

6

8

10

12

0

2

4

6

8

10

12

Load Current [Adc]

Fig. 5.0V.7: Power dissipation vs. load current and

input voltage for SQ48T/S10050 converter mounted

vertically with air flowing from pin 3 to pin 1 at a rate of

300 LFM (1.5 m/s) and Ta = 25 °C.

Fig. 5.0V.8: Power dissipation vs. load current and

ambient temperature for SQ48T/S10050 converter

mounted vertically with Vin = 48 V and air flowing from

pin 3 to pin 1 at a rate of 200 LFM (1.0 m/s).

Fig. 5.0V.9: Turn-on transient at full rated load current

(resistive) with no output capacitor at Vin = 48 V,

triggered via ON/OFF pin. Top trace: ON/OFF signal

(5 V/div.). Bottom trace: output voltage (2 V/div.). Time

scale: 2 ms/div.

Fig. 5.0V.10: Turn-on transient at full rated load

current (resistive) plus 10,000 µF at Vin = 48 V,

triggered via ON/OFF pin. Top trace: ON/OFF signal

(5 V/div.). Bottom trace: output voltage (2 V/div.). Time

scale: 2 ms/div.

REV. SEP 14, 2005

Page 25 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

SQ48T/S10050 (5.0 Volt Out)

Fig. 5.0V.11: Output voltage response to load current

step-change (2.5 A – 5 A – 2.5 A) at Vin = 48 V. Top

trace: output voltage (200 mV/div.). Bottom trace: load

current (2 A/div.). Current slew rate: 0.1 A/µs. Co = 1 µF

ceramic. Time scale: 0.2 ms/div.

Fig. 5.0V.12: Output voltage response to load current

step-change (2.5 A – 5 A – 2.5 A) at Vin = 48 V. Top

trace: output voltage (200 mV/div.). Bottom trace: load

current (2 A/div.). Current slew rate:

5

A/µs.

Co = 450 µF tantalum + 1 µF ceramic. Time scale:

0.2 ms/div.

i_S

i_C

10 µH

source

inductance

TM

33 µF

ESR <1

electrolytic

capacitor

1 µF

ceramic

capacitor

Family

SemiQ

DC-DC

Converter

Ω

Vout

Vsource

Fig. 5.0V.13: Output voltage ripple (20 mV/div.) at full

rated load current into a resistive load with Co = 10 µF

tantalum + 1 µF ceramic and Vin = 48 V. Time scale:

1 µs/div.

Fig. 5.0V.14: Test Setup for measuring input reflected

ripple currents, i_cand i_s.

REV. SEP 14, 2005

Page 26 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

SQ48T/S10050 (5.0 Volt Out)

Fig. 5.0V.16: Input reflected ripple current, i_s

(10 mA/div.), measured through 10 µH at the source at

full rated load current and Vin = 48 V. Refer to

Fig. 5.0V.14 for test setup. Time scale: 1 µs/div.

Fig. 5.0V.15: Input reflected ripple current, i_c

(100 mA/div.), measured at input terminals at full rated

load current and Vin = 48 V. Refer to Fig. 5.0V.14 for

test setup. Time scale: 1 µs/div.

6

5

4

3

2

1

0

5

10

15

Iout [Adc]

Fig. 5.0V.18: Load current (top trace, 10 A/div.,

20 ms/div.) into a 10 mꢀ short circuit during restart, at

Vin = 48 V. Bottom trace (10 A/div., 1 ms/div.) is an

expansion of the on-time portion of the top trace.

Fig. 5.0V.17: Output voltage vs. load current showing

current limit point and converter shutdown point. Input

voltage has almost no effect on current limit

characteristic.

REV. SEP 14, 2005

Page 27 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

Electrical Specifications: SQ48T/S15033 (3.3 Volt Out)

Conditions: T_A= 25 ºC, Airflow = 300 LFM (1.5 m/s), Vin = 48 VDC, Vout = 3.3 VDC, unless otherwise specified.

Parameter

Notes

Min

Typ

Max

Units

Input Characteristics

Maximum Input Current

Input Stand-by Current

Input No Load Current (0 load on the output)

Input Reflected-Ripple Current

Input Voltage Ripple Rejection

15 ADC, 3.3 VDC Out @ 36 VDC In

Vin = 48 V, converter disabled

Vin = 48 V, converter enabled

25 MHz bandwidth

1.6

ADC

mADC

mA_PK-PK

dB

2.6

42

6

120 Hz

TBD

Output Characteristics

Output Voltage Set Point (no load)

Output Regulation

Over Line

3.267

3.250

3.300

3.333

VDC

±2

±5

3.350

mV

VDC

Over Load

Output Voltage Range

Output Ripple and Noise - 25 MHz

bandwidth

External Load Capacitance

Output Current Range

Current Limit Inception

Peak Short-Circuit Current

RMS Short-Circuit Current

Over line, load and temperature¹

Full load + 10 µF tantalum + 1 µF

ceramic

30

50

15,000

15

20

40

mV_PK-PK

µF

ADC

A

Plus full load (resistive)

0

Non-latching

Non-latching, Short =10 mꢀ.

Non-latching

15.75

18

30

5.3

Arms

Dynamic Response

Load Change 25% of Iout Max, di/dt = 0.1 A/µs Co = 1 µF ceramic

80

mV

di/dt = 5 A/µs Co = 450 µF POS + 1 µF ceramic

140

100

mV

µs

Settling Time to 1%

Efficiency

100% Load

50% Load

89.5

%

¹-40 ºC to 85 ºC.

20

15

10

5

15

10

500 LFM (2.5 m/s)

400 LFM (2.0 m/s)

300 LFM (1.5 m/s)

200 LFM (1.0 m/s)

100 LFM (0.5 m/s)

30 LFM (0.15 m/s)

400 LFM (2.0 m/s)

300 LFM (1.5 m/s)

200 LFM (1.0 m/s)

100 LFM (0.5 m/s)

30 LFM (0.15 m/s)

5

0

20

30

40

50

60

70

80

90

20

30

40

50

60

70

80

90

Ambient Temperature [°C]

Fig. 3.3V.1: Available load current vs. ambient air

temperature and airflow rates for SQ48T15033 converter

with D height pins mounted vertically with Vin = 48 V, air

flowing from pin 3 to pin 1, and maximum FET

temperature ≤ 120 °C.

Fig. 3.3V.2: Available load current vs. ambient air

temperature and airflow rates for SQ48T15033 converter

with D height pins mounted horizontally with Vin = 48 V,

air flowing from pin 3 to pin 1, and maximum FET

temperature ≤ 120 °C.

REV. SEP 14, 2005

Page 28 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

SQ48T/S15033 (3.3 Volt Out)

20

15

10

20

15

10

500 LFM (2.5 m/s)

400 LFM (2.0 m/s)

300 LFM (1.5 m/s)

200 LFM (1.0 m/s)

100 LFM (0.5 m/s)

500 LFM (2.5 m/s)

400 LFM (2.0 m/s)

300 LFM (1.5 m/s)

200 LFM (1.0 m/s)

100 LFM (0.5 m/s)

5

30 LFM (0.15 m/s)

0

20

30

40

50

60

70

80

90

20

30

40

50

60

70

80

90

Ambient Temperature [°C]

Fig. 3.3V.4: Available load current vs. ambient air

temperature and airflow rates for SQ48S15033 converter

mounted horizontally with Vin = 48 V, air flowing from pin

3 to pin 1, and maximum FET temperature ≤ 120 °C.

Fig. 3.3V.3: Available load current vs. ambient air

temperature and airflow rates for SQ48S15033 converter

mounted vertically with Vin = 48 V, air flowing from pin 3

to pin 1, and maximum FET temperature ≤ 120 °C.

0.95

0.90

0.85

0.80

0.95

0.90

0.85

0.80

70 C

55 C

40 C

0.75

72 V

48 V

36 V

0.75

0.70

0.65

0.70

0.65

0

2

4

6

8

10

12

14

16

0

2

4

6

8

10

12

14

16

Load Current [Adc]

Fig. 3.3V.6: Efficiency vs. load current and ambient

temperature for SQ48T/S15033 converter mounted

vertically with Vin = 48 V and air flowing from pin 3 to pin

1 at a rate of 200 LFM (1.0 m/s).

Fig. 3.3V.5: Efficiency vs. load current and input voltage

for SQ48T/S15033 converter mounted vertically with air

flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s)

and Ta = 25 °C.

REV. SEP 14, 2005

Page 29 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

SQ48T/S15033 (3.3 Volt Out)

8.00

6.00

4.00

2.00

0.00

8.00

6.00

4.00

72 V

48 V

36 V

70 C

55 C

40 C

2.00

0.00

0

2

4

6

8

10

12

14

16

0

2

4

6

8

10

12

14

16

Load Current [Adc]

Fig. 3.3V.7: Power dissipation vs. load current and

input voltage for SQ48T/S15033 converter mounted

vertically with air flowing from pin 3 to pin 1 at a rate of

300 LFM (1.5 m/s) and Ta = 25 °C.

Fig. 3.3V.8: Power dissipation vs. load current and

ambient temperature for SQ48T/S15033 converter

mounted vertically with Vin = 48 V and air flowing from

pin 3 to pin 1 at a rate of 200 LFM (1.0 m/s).

Fig. 3.3V.9: Turn-on transient at full rated load current

(resistive) with no output capacitor at Vin = 48 V,

triggered via ON/OFF pin. Top trace: ON/OFF signal

(5 V/div.). Bottom trace: output voltage (1 V/div.). Time

scale: 2 ms/div.

Fig. 3.3V.10: Turn-on transient at full rated load

current (resistive) plus 10,000 µF at Vin = 48 V,

triggered via ON/OFF pin. Top trace: ON/OFF signal

(5 V/div.). Bottom trace: output voltage (1 V/div.). Time

scale: 2 ms/div.

REV. SEP 14, 2005

Page 30 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

SQ48T/S15033 (3.3 Volt Out)

Fig. 3.3V.12: Output voltage response to load current

step-change (3.75 A – 7.5 A – 3.75 A) at Vin = 48 V.

Top trace: output voltage (100 mV/div.). Bottom trace:

load current (5 A/div.). Current slew rate: 5 A/µs. Co =

450 µF tantalum + 1 µF ceramic. Time scale: 0.2 ms/div.

Fig. 3.3V.11: Output voltage response to load current

step-change (3.75 A – 7.5 A – 3.75 A) at Vin = 48 V.

Top trace: output voltage (100 mV/div.). Bottom trace:

load current (5 A/div.). Current slew rate: 0.1 A/µs.

Co = 1 µF ceramic. Time scale: 0.2 ms/div.

i_S

i_C

10 µH

source

inductance

TM

33 µF

ESR <1

electrolytic

capacitor

1 µF

ceramic

capacitor

Family

SemiQ

DC-DC

Converter

Ω

Vout

Vsource

Fig. 3.3V.14: Test Setup for measuring input reflected

ripple currents, i_cand i_s.

Fig. 3.3V.13: Output voltage ripple (20 mV/div.) at full

rated load current into a resistive load with Co = 10 µF

tantalum + 1 µF ceramic and Vin = 48 V. Time scale:

1 µs/div.

REV. SEP 14, 2005

Page 31 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

SQ48T/S15033 (3.3 Volt Out)

Fig. 3.3V.15: Input reflected ripple current, i_c

(100 mA/div.), measured at input terminals at full rated

load current and Vin = 48 V. Refer to Fig. 3.3V.14 for

test setup. Time scale: 1 µs/div.

Fig. 3.3V.16: Input reflected ripple current, i_s

(10 mA/div.), measured through 10 µH at the source at

full rated load current and Vin = 48 V. Refer to

Fig. 3.3V.14 for test setup. Time scale: 1 µs/div.

4

3

2

1

0

20

0

5

10

15

Iout [Adc]

Fig. 3.3V.18: Load current (top trace, 20 A/div.,

20 ms/div.) into a 10 mꢀ short circuit during restart, at

Vin = 48 V. Bottom trace (20 A/div., 1 ms/div.) is an

expansion of the on-time portion of the top trace.

Fig. 3.3V.17: Output voltage vs. load current showing

current limit point and converter shutdown point. Input

voltage has almost no effect on current limit

characteristic.

REV. SEP 14, 2005

Page 32 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

Electrical Specifications: SQ48T/S15025 (2.5 Volt Out)

Conditions: T_A= 25ºC, Airflow = 300 LFM (1.5 m/s), Vin = 48 VDC, Vout = 2.5 VDC, unless otherwise specified.

Parameter

Notes

Min

Typ

Max

Units

Input Characteristics

Maximum Input Current

Input Stand-by Current

Input No Load Current (0 load on the output)

Input Reflected-Ripple Current

Input Voltage Ripple Rejection

15 ADC, 2.5 VDC Out @ 36 VDC In

Vin = 48 V, converter disabled

Vin = 48 V, converter enabled

25 MHz bandwidth

1.2

ADC

mADC

mA_PK-PK

dB

2.6

34

6

120 Hz

TBD

Output Characteristics

Output Voltage Set Point (no load)

Output Regulation

Over Line

2.475

2.462

2.500

2.525

VDC

±2

±5

2.538

mV

VDC

Over Load

Output Voltage Range

Output Ripple and Noise - 25 MHz

bandwidth

External Load Capacitance

Output Current Range

Current Limit Inception

Peak Short-Circuit Current

RMS Short-Circuit Current

Over line, load and temperature¹

Full load + 10 µF tantalum + 1 µF

ceramic

30

50

15,000

15

20

40

mV_PK-PK

µF

ADC

A

Plus full load (resistive)

0

Non-latching

Non-latching, Short =10 mꢀ.

Non-latching

15.75

18

30

5.3

Arms

Dynamic Response

Load Change 25% of Iout Max, di/dt = 0.1 A/µs Co = 1 µF ceramic

120

mV

di/dt = 5 A/µs Co = 450 µF POS + 1 µF ceramic

120

100

mV

µs

Settling Time to 1%

Efficiency

100% Load

50% Load

87.0

87.5

%

¹-40 ºC to 85 ºC.

20

15

10

5

15

10

500 LFM (2.5 m/s)

400 LFM (2.0 m/s)

300 LFM (1.5 m/s)

200 LFM (1.0 m/s)

100 LFM (0.5 m/s)

30 LFM (0.15 m/s)

400 LFM (2.0 m/s)

300 LFM (1.5 m/s)

200 LFM (1.0 m/s)

100 LFM (0.5 m/s)

30 LFM (0.15 m/s)

5

0

20

30

40

50

60

70

80

90

20

30

40

50

60

70

80

90

Ambient Temperature [°C]

Fig. 2.5V.1: Available load current vs. ambient air

temperature and airflow rates for SQ48T15025 converter

with D height pins mounted vertically with Vin = 48 V, air

flowing from pin 3 to pin 1, and maximum FET

temperature ≤ 120 °C.

Fig. 2.5V.2: Available load current vs. ambient air

temperature and airflow rates for SQ48T15025 converter

with D height pins mounted horizontally with Vin = 48 V, air

flowing from pin 3 to pin 1, and maximum FET temperature

≤ 120 °C.

REV. SEP 14, 2005

Page 33 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

SQ48T/S15025 (2.5 Volt Out)

20

15

10

20

15

10

500 LFM (2.5 m/s)

400 LFM (2.0 m/s)

300 LFM (1.5 m/s)

200 LFM (1.0 m/s)

100 LFM (0.5 m/s)

500 LFM (2.5 m/s)

400 LFM (2.0 m/s)

300 LFM (1.5 m/s)

200 LFM (1.0 m/s)

100 LFM (0.5 m/s)

5

30 LFM (0.15 m/s)

0

20

30

40

50

60

70

80

90

20

30

40

50

60

70

80

90

Ambient Temperature [°C]

Fig. 2.5V.4: Available load current vs. ambient air

temperature and airflow rates for SQ48S15025 converter

mounted horizontally with Vin = 48 V, air flowing from pin

3 to pin 1, and maximum FET temperature ≤ 120 °C.

Fig. 2.5V.3: Available load current vs. ambient air

temperature and airflow rates for SQ48S15025 converter

mounted vertically with Vin = 48 V, air flowing from pin 3

to pin 1, and maximum FET temperature ≤ 120 °C.

0.95

0.90

0.85

0.80

0.95

0.90

0.85

0.80

70 C

55 C

40 C

0.75

72 V

48 V

36 V

0.75

0.70

0.65

0.70

0.65

0

2

4

6

8

10

12

14

16

0

2

4

6

8

10

12

14

16

Load Current [Adc]

Fig. 2.5V.6: Efficiency vs. load current and ambient

temperature for SQ48T/S15025 converter mounted

vertically with Vin = 48 V and air flowing from pin 3 to pin

1 at a rate of 200 LFM (1.0 m/s).

Fig. 2.5V.5: Efficiency vs. load current and input voltage

for SQ48T/S15025 converter mounted vertically with air

flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s)

and Ta = 25 °C.

REV. SEP 14, 2005

Page 34 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

SQ48T/S15025 (2.5 Volt Out)

8.00

6.00

4.00

2.00

0.00

8.00

6.00

4.00

72 V

48 V

36 V

70 C

55 C

40 C

2.00

0.00

0

2

4

6

8

10

12

14

16

0

2

4

6

8

10

12

14

16

Load Current [Adc]

Fig. 2.5V.7: Power dissipation vs. load current and

input voltage for SQ48T/S15025 converter mounted

vertically with air flowing from pin 3 to pin 1 at a rate of

300 LFM (1.5 m/s) and Ta = 25 °C.

Fig. 2.5V.8: Power dissipation vs. load current and

ambient temperature for SQ48T/S15025 converter

mounted vertically with Vin = 48 V and air flowing from

pin 3 to pin 1 at a rate of 200 LFM (1.0 m/s).

Fig. 2.5V.10: Turn-on transient at full rated load

current (resistive) plus 10,000 µF at Vin = 48 V,

triggered via ON/OFF pin. Top trace: ON/OFF signal

(5 V/div.). Bottom trace: output voltage (1 V/div.). Time

scale: 2 ms/div.

Fig. 2.5V.9: Turn-on transient at full rated load current

(resistive) with no output capacitor at Vin = 48 V,

triggered via ON/OFF pin. Top trace: ON/OFF signal

(5 V/div.). Bottom trace: output voltage (1 V/div.). Time

scale: 2 ms/div.

REV. SEP 14, 2005

Page 35 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

SQ48T/S15025 (2.5 Volt Out)

Fig. 2.5V.11: Output voltage response to load current

step-change (3.75 A – 7.5 A – 3.75 A) at Vin = 48 V.

Top trace: output voltage (100 mV/div.). Bottom trace:

load current (5 A/div.). Current slew rate: 0.1 A/µs.

Co = 1 µF ceramic. Time scale: 0.2 ms/div.

Fig. 2.5V.12: Output voltage response to load current

step-change (3.75 A – 7.5 A – 3.75 A) at Vin = 48 V.

Top trace: output voltage (100 mV/div.). Bottom trace:

load current (5 A/div.). Current slew rate: 5 A/µs. Co =

450 µF tantalum + 1 µF ceramic. Time scale: 0.2 ms/div.

i_S

i_C

10 µH

source

inductance

TM

33 µF

ESR <1

electrolytic

capacitor

1 µF

ceramic

capacitor

Family

SemiQ

DC-DC

Converter

Ω

Vout

Vsource

Fig. 2.5V.13: Output voltage ripple (20 mV/div.) at full

rated load current into a resistive load with Co = 10 µF

tantalum + 1 µF ceramic and Vin = 48 V. Time scale:

1 µs/div.

Fig. 2.5V.14: Test Setup for measuring input reflected

ripple currents, i_cand i_s.

REV. SEP 14, 2005

Page 36 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

SQ48T/S15025 (2.5 Volt Out)

Fig. 2.5V.15: Input reflected ripple current, i_c

(100 mA/div.), measured at input terminals at full rated

load current and Vin = 48 V. Refer to Fig. 2.5V.14 for

test setup. Time scale: 1 µs/div.

Fig. 2.5V.16: Input reflected ripple current, i_s

(10 mA/div.), measured through 10 µH at the source at

full rated load current and Vin = 48 V. Refer to

Fig. 2.5V.14 for test setup. Time scale: 1 µs/div.

3

2

1

0

20

0

5

10

15

Iout [Adc]

Fig. 2.5V.18: Load current (top trace, 20 A/div.,

20 ms/div.) into a 10 mꢀ short circuit during restart, at

Vin = 48 V. Bottom trace (20 A/div., 1 ms/div.) is an

expansion of the on-time portion of the top trace.

Fig. 2.5V.17: Output voltage vs. load current showing

current limit point and converter shutdown point. Input

voltage has almost no effect on current limit

characteristic.

REV. SEP 14, 2005

Page 37 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

Electrical Specifications: SQ48T/S15020 (2.0 Volt Out)

Conditions: T_A= 25 ºC, Airflow = 300 LFM (1.5 m/s), Vin = 48 VDC, Vout = 2.0 VDC, unless otherwise specified.

Parameter

Notes

Min

Typ

Max

Units

Input Characteristics

Maximum Input Current

Input Stand-by Current

Input No Load Current (0 load on the output)

Input Reflected-Ripple Current

Input Voltage Ripple Rejection

15 ADC, 2.0 VDC Out @ 36 VDC In

Vin = 48 V, converter disabled

Vin = 48 V, converter enabled

25 MHz bandwidth

1.0

ADC

mADC

mA_PK-PK

dB

3

31

6

120 Hz

TBD

Output Characteristics

Output Voltage Set Point (no load)

Output Regulation

Over Line

1.98

2.000

2.02

VDC

±2

±5

2.030

mV

VDC

Over Load

Output Voltage Range

Output Ripple and Noise - 25 MHz

bandwidth

External Load Capacitance

Output Current Range

Current Limit Inception

Peak Short-Circuit Current

RMS Short-Circuit Current

Over line, load and temperature¹

Full load + 10 µF tantalum + 1 µF

ceramic

1.970

30

50

15,000

15

20

40

mV_PK-PK

µF

ADC

A

Plus full load (resistive)

0

Non-latching

Non-latching, Short =10 mꢀ.

Non-latching

15.75

18

30

5.3

Arms

Dynamic Response

Load Change 25% of Iout Max, di/dt = 0.1 A/µs Co = 1 µF ceramic

80

mV

di/dt = 5 A/µs Co = 450 µF POS + 1 µF ceramic

60

mV

µs

Settling Time to 1%

Efficiency

100% Load

50% Load

86.5

87.0

%

¹-40 ºC to 85 ºC.

20

15

10

5

15

10

500 LFM (2.5 m/s)

400 LFM (2.0 m/s)

300 LFM (1.5 m/s)

200 LFM (1.0 m/s)

100 LFM (0.5 m/s)

30 LFM (0.15 m/s)

400 LFM (2.0 m/s)

300 LFM (1.5 m/s)

200 LFM (1.0 m/s)

100 LFM (0.5 m/s)

30 LFM (0.15 m/s)

5

0

20

30

40

50

60

70

80

90

20

30

40

50

60

70

80

90

Ambient Temperature [°C]

Fig. 2.0V.1: Available load current vs. ambient air

temperature and airflow rates for SQ48T15020 converter

with D height pins mounted vertically with Vin = 48 V, air

flowing from pin 3 to pin 1, and maximum FET

temperature ≤ 120 °C.

Fig. 2.0V.2: Available load current vs. ambient air

temperature and airflow rates for SQ48T15020 converter

with D height pins mounted horizontally with Vin = 48 V,

air flowing from pin 3 to pin 1, and maximum FET

temperature ≤ 120 °C.

REV. SEP 14, 2005

Page 38 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

SQ48T/S15020 (2.0 Volt Out)

20

15

10

20

15

10

500 LFM (2.5 m/s)

400 LFM (2.0 m/s)

300 LFM (1.5 m/s)

200 LFM (1.0 m/s)

100 LFM (0.5 m/s)

500 LFM (2.5 m/s)

400 LFM (2.0 m/s)

300 LFM (1.5 m/s)

200 LFM (1.0 m/s)

100 LFM (0.5 m/s)

5

30 LFM (0.15 m/s)

0

20

30

40

50

60

70

80

90

20

30

40

50

60

70

80

90

Ambient Temperature [°C]

Fig. 2.0V.4: Available load current vs. ambient air

temperature and airflow rates for SQ48S15020 converter

mounted horizontally with Vin = 48 V, air flowing from pin

3 to pin 1, and maximum FET temperature ≤ 120 °C.

Fig. 2.0V.3: Available load current vs. ambient air

temperature and airflow rates for SQ48S15020 converter

mounted vertically with Vin = 48 V, air flowing from pin 3

to pin 1, and maximum FET temperature ≤ 120 °C.

0.95

0.90

0.85

0.80

0.95

0.90

0.85

0.80

70 C

55 C

40 C

0.75

72 V

48 V

36 V

0.75

0.70

0.65

0.70

0.65

0

2

4

6

8

10

12

14

16

0

2

4

6

8

10

12

14

16

Load Current [Adc]

Fig. 2.0V.6: Efficiency vs. load current and ambient

temperature for SQ48T/S15020 converter mounted

vertically with Vin = 48 V and air flowing from pin 3 to pin

1 at a rate of 200 LFM (1.0 m/s).

Fig. 2.0V.5: Efficiency vs. load current and input voltage

for SQ48T/S15020 converter mounted vertically with air

flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s)

and Ta = 25 °C.

REV. SEP 14, 2005

Page 39 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

SQ48T/S15020 (2.0 Volt Out)

6.00

5.00

4.00

3.00

2.00

1.00

0.00

6.00

5.00

4.00

3.00

72 V

48 V

36 V

70 C

55 C

40 C

2.00

1.00

0.00

0

2

4

6

8

10

12

14

16

0

2

4

6

8

10

12

14

16

Load Current [Adc]

Fig. 2.0V.7: Power dissipation vs. load current and

input voltage for SQ48T/S15020 converter mounted

vertically with air flowing from pin 3 to pin 1 at a rate of

300 LFM (1.5 m/s) and Ta = 25 °C.

Fig. 2.0V.8: Power dissipation vs. load current and

ambient temperature for SQ48T/S15020 converter

mounted vertically with Vin = 48 V and air flowing from

pin 3 to pin 1 at a rate of 200 LFM (1.0 m/s).

Fig. 2.0V.9: Turn-on transient at full rated load current

(resistive) with no output capacitor at Vin = 48 V,

triggered via ON/OFF pin. Top trace: ON/OFF signal

(5 V/div.). Bottom trace: output voltage (1 V/div.). Time

scale: 2 ms/div.

Fig. 2.0V.10: Turn-on transient at full rated load

current (resistive) plus 10,000 µF at Vin = 48 V,

triggered via ON/OFF pin. Top trace: ON/OFF signal

(5 V/div.). Bottom trace: output voltage (1 V/div.). Time

scale: 2 ms/div.

REV. SEP 14, 2005

Page 40 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

SQ48T/S15020 (2.0 Volt Out)

Fig. 2.0V.11: Output voltage response to load current

step-change (3.75 A – 7.5 A – 3.75 A) at Vin = 48 V.

Top trace: output voltage (100 mV/div.). Bottom trace:

load current (5 A/div.). Current slew rate: 0.1 A/µs.

Co = 1 µF ceramic. Time scale: 0.2 ms/div.

Fig. 2.0V.12: Output voltage response to load current

step-change (3.75 A – 7.5 A – 3.75 A) at Vin = 48 V.

Top trace: output voltage (100 mV/div.). Bottom trace:

load current (5 A/div.). Current slew rate: 5 A/µs. Co =

450 µF tantalum + 1 µF ceramic. Time scale: 0.2 ms/div.

i_S

i_C

10 µH

source

inductance

TM

33 µF

ESR <1

electrolytic

capacitor

1 µF

ceramic

capacitor

Family

SemiQ

DC-DC

Converter

Ω

Vout

Vsource

Fig. 2.0V.13: Output voltage ripple (20 mV/div.) at full

rated load current into a resistive load with Co = 10 µF

tantalum + 1 µF ceramic and Vin = 48 V. Time scale:

1 µs/div.

Fig. 2.0V.14: Test Setup for measuring input reflected

ripple currents, i_cand i_s.

REV. SEP 14, 2005

Page 41 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

SQ48T/S15020 (2.0 Volt Out)

Fig. 2.0V.15: Input reflected ripple current, i_c

(100 mA/div.), measured at input terminals at full rated

load current and Vin = 48 V. Refer to Fig. 2.0V.14 for

test setup. Time scale: 1 µs/div.

Fig. 2.0V.16: Input reflected ripple current, i_s

(10 mA/div.), measured through 10 µH at the source at

full rated load current and Vin = 48 V. Refer to

Fig. 2.0V.14 for test setup. Time scale: 1 µs/div.

3

2

1

0

20

0

5

10

15

Iout [Adc]

Fig. 2.0V.18: Load current (top trace, 20 A/div.,

20 ms/div.) into a 10 mꢀ short circuit during restart, at

Vin = 48 V. Bottom trace (20 A/div., 1 ms/div.) is an

expansion of the on-time portion of the top trace.

Fig. 2.0V.17: Output voltage vs. load current showing

current limit point and converter shutdown point. Input

voltage has almost no effect on current limit

characteristic.

REV. SEP 14, 2005

Page 42 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

Electrical Specifications: SQ48T/S15018 (1.8 Volt Out)

Conditions: T_A= 25 ºC, Airflow = 300 LFM (1.5 m/s), Vin = 48 VDC, Vout = 1.8 VDC, unless otherwise specified.

Parameter

Notes

Min

Typ

Max

Units

Input Characteristics

Maximum Input Current

Input Stand-by Current

Input No Load Current (0 load on the output)

Input Reflected-Ripple Current

Input Voltage Ripple Rejection

15 ADC, 1.8 VDC Out @ 36 VDC In

Vin = 48 V, converter disabled

Vin = 48 V, converter enabled

25 MHz bandwidth

0.9

ADC

mADC

mA_PK-PK

dB

2.6

29

6

120 Hz

TBD

Output Characteristics

Output Voltage Set Point (no load)

Output Regulation

Over Line

1.782

1.773

1.800

1.818

VDC

±2

±4

±5

1.827

mV

VDC

Over Load

Output Voltage Range

Output Ripple and Noise - 25 MHz

bandwidth

External Load Capacitance

Output Current Range

Current Limit Inception

Peak Short-Circuit Current

RMS Short-Circuit Current

Over line, load and temperature¹

Full load + 10 µF tantalum + 1 µF

ceramic

30

50

15,000

15

20

40

mV_PK-PK

µF

ADC

A

Plus full load (resistive)

0

Non-latching

Non-latching, Short =10 mꢀ.

Non-latching

15.75

18

30

5.3

Arms

Dynamic Response

Load Change 25% of Iout Max, di/dt = 0.1 A/µs Co = 1 µF ceramic

80

mV

di/dt = 5 A/µs Co = 450 µF POS + 1 µF ceramic

100

mV

µs

Settling Time to 1%

Efficiency

100% Load

50% Load

85.5

86.0

%

¹-40 ºC to 85 ºC.

20

15

10

5

15

10

500 LFM (2.5 m/s)

400 LFM (2.0 m/s)

300 LFM (1.5 m/s)

200 LFM (1.0 m/s)

100 LFM (0.5 m/s)

30 LFM (0.15 m/s)

400 LFM (2.0 m/s)

300 LFM (1.5 m/s)

200 LFM (1.0 m/s)

100 LFM (0.5 m/s)

30 LFM (0.15 m/s)

5

0

20

30

40

50

60

70

80

90

20

30

40

50

60

70

80

90

Ambient Temperature [°C]

Fig. 1.8V.1: Available load current vs. ambient air

temperature and airflow rates for SQ48T15018 converter

with D height pins mounted vertically with Vin = 48 V, air

flowing from pin 3 to pin 1, and maximum FET

temperature ≤ 120 °C.

Fig. 1.8V.2: Available load current vs. ambient air

temperature and airflow rates for SQ48T15018 converter

with D height pins mounted horizontally with Vin = 48 V,

air flowing from pin 3 to pin 1, and maximum FET

temperature ≤ 120 °C.

REV. SEP 14, 2005

Page 43 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

SQ48T/S15018 (1.8 Volt Out)

20

15

10

20

15

10

500 LFM (2.5 m/s)

400 LFM (2.0 m/s)

300 LFM (1.5 m/s)

200 LFM (1.0 m/s)

100 LFM (0.5 m/s)

500 LFM (2.5 m/s)

400 LFM (2.0 m/s)

300 LFM (1.5 m/s)

200 LFM (1.0 m/s)

100 LFM (0.5 m/s)

5

30 LFM (0.15 m/s)

0

20

30

40

50

60

70

80

90

20

30

40

50

60

70

80

90

Ambient Temperature [°C]

Fig. 1.8V.4: Available load current vs. ambient air

temperature and airflow rates for SQ48S15018 converter

mounted horizontally with Vin = 48 V, air flowing from pin

3 to pin 1, and maximum FET temperature ≤ 120 °C.

Fig. 1.8V.3: Available load current vs. ambient air

temperature and airflow rates for SQ48S15018 converter

mounted vertically with Vin = 48 V, air flowing from pin 3

to pin 1, and maximum FET temperature ≤ 120 °C.

0.95

0.90

0.85

0.80

0.95

0.90

0.85

0.80

70 C

55 C

40 C

0.75

72 V

48 V

36 V

0.75

0.70

0.65

0.70

0.65

0

2

4

6

8

10

12

14

16

0

2

4

6

8

10

12

14

16

Load Current [Adc]

Fig. 1.8V.6: Efficiency vs. load current and ambient

temperature for SQ48T/S15018 converter mounted

vertically with Vin = 48 V and air flowing from pin 3 to pin

1 at a rate of 200 LFM (1.0 m/s).

Fig. 1.8V.5: Efficiency vs. load current and input voltage

for SQ48T/S15018 converter mounted vertically with air

flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s)

and Ta = 25 °C.

REV. SEP 14, 2005

Page 44 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

SQ48T/S15018 (1.8 Volt Out)

6.00

5.00

4.00

3.00

2.00

1.00

0.00

6.00

5.00

4.00

3.00

72 V

48 V

36 V

70 C

55 C

40 C

2.00

1.00

0.00

0

2

4

6

8

10

12

14

16

0

2

4

6

8

10

12

14

16

Load Current [Adc]

Fig. 1.8V.7: Power dissipation vs. load current and

input voltage for SQ48T/S15018 converter mounted

vertically with air flowing from pin 3 to pin 1 at a rate of

300 LFM (1.5 m/s) and Ta = 25 °C.

Fig. 1.8V.8: Power dissipation vs. load current and

ambient temperature for SQ48T/S15018 converter

mounted vertically with Vin = 48 V and air flowing from

pin 3 to pin 1 at a rate of 200 LFM (1.0 m/s).

Fig. 1.8V.9: Turn-on transient at full rated load current

(resistive) with no output capacitor at Vin = 48 V,

triggered via ON/OFF pin. Top trace: ON/OFF signal

(5 V/div.). Bottom trace: output voltage (1 V/div.). Time

scale: 2 ms/div.

Fig. 1.8V.10: Turn-on transient at full rated load

current (resistive) plus 10,000 µF at Vin = 48 V,

triggered via ON/OFF pin. Top trace: ON/OFF signal

(5 V/div.). Bottom trace: output voltage (1 V/div.). Time

scale: 2 ms/div.

REV. SEP 14, 2005

Page 45 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

SQ48T/S15018 (1.8 Volt Out)

Fig. 1.8V.11: Output voltage response to load current

step-change (3.75 A – 7.5 A – 3.75 A) at Vin = 48 V.

Top trace: output voltage (100 mV/div.). Bottom trace:

load current (5 A/div.). Current slew rate: 0.1 A/µs.

Co = 1 µF ceramic. Time scale: 0.2 ms/div.

Fig. 1.8V.12: Output voltage response to load current

step-change (3.75 A – 7.5 A – 3.75 A) at Vin = 48 V.

Top trace: output voltage (100 mV/div.). Bottom trace:

load current (5 A/div.). Current slew rate: 5 A/µs. Co =

450 µF tantalum + 1 µF ceramic. Time scale: 0.2 ms/div.

i_S

i_C

10 µH

source

inductance

TM

33 µF

ESR <1

electrolytic

capacitor

1 µF

ceramic

capacitor

Family

SemiQ

DC-DC

Converter

Ω

Vout

Vsource

Fig. 1.8V.13: Output voltage ripple (20 mV/div.) at full

rated load current into a resistive load with Co = 10 µF

tantalum + 1 µF ceramic and Vin = 48 V. Time scale:

1 µs/div.

Fig. 1.8V.14: Test Setup for measuring input reflected

ripple currents, i_cand i_s.

REV. SEP 14, 2005

Page 46 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

SQ48T/S15018 (1.8 Volt Out)

Fig. 1.8V.15: Input reflected ripple current, i_c

(100 mA/div.), measured at input terminals at full rated

load current and Vin = 48 V. Refer to Fig. 1.8V.14 for

test setup. Time scale: 1 µs/div.

Fig. 1.8V.16: Input reflected ripple current, i_s

(10 mA/div.), measured through 10 µH at the source at

full rated load current and Vin = 48 V. Refer to

Fig. 1.8V.14 for test setup. Time scale: 1 µs/div.

3

2

1

0

20

0

5

10

15

Iout [Adc]

Fig. 1.8V.18: Load current (top trace, 20 A/div.,

20 ms/div.) into a 10 mꢀ short circuit during restart, at

Vin = 48 V. Bottom trace (20 A/div., 1 ms/div.) is an

expansion of the on-time portion of the top trace.

Fig. 1.8V.17: Output voltage vs. load current showing

current limit point and converter shutdown point. Input

voltage has almost no effect on current limit

characteristic.

REV. SEP 14, 2005

Page 47 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

Electrical Specifications: SQ48T/S15015 (1.5 Volt Out)

Conditions: T_A= 25 ºC, Airflow = 300 LFM (1.5 m/s), Vin = 48 VDC, Vout = 1.5 VDC, unless otherwise specified.

Parameter

Notes

Min

Typ

Max

Units

Input Characteristics

Maximum Input Current

Input Stand-by Current

Input No Load Current (0 load on the output)

Input Reflected-Ripple Current

Input Voltage Ripple Rejection

15 ADC, 1.5 VDC Out @ 36 VDC In

Vin = 48 V, converter disabled

Vin = 48 V, converter enabled

25 MHz bandwidth

0.75

ADC

mADC

mA_PK-PK

dB

2.6

25

6

120 Hz

TBD

Output Characteristics

Output Voltage Set Point (no load)

Output Regulation

Over Line

1.485

1.477

1.500

1.515

VDC

±2

±4

1.523

mV

VDC

Over Load

Output Voltage Range

Output Ripple and Noise - 25 MHz

bandwidth

External Load Capacitance

Output Current Range

Current Limit Inception

Peak Short-Circuit Current

RMS Short-Circuit Current

Over line, load and temperature¹

Full load + 10 µF tantalum + 1 µF

ceramic

30

50

15,000

15

20

40

mV_PK-PK

µF

ADC

A

Plus full load (resistive)

0

Non-latching

Non-latching, Short =10 mꢀ.

Non-latching

15.75

18

30

5.3

Arms

Dynamic Response

Load Change 25% of Iout Max, di/dt = 0.1 A/µs Co = 1 µF ceramic

80

mV

di/dt = 5 A/µs Co = 450 µF POS + 1 µF ceramic

120

100

mV

µs

Settling Time to 1%

Efficiency

100% Load

50% Load

84.5

85.0

%

¹-40 ºC to 85 ºC.

20

15

10

5

15

10

500 LFM (2.5 m/s)

400 LFM (2.0 m/s)

300 LFM (1.5 m/s)

200 LFM (1.0 m/s)

100 LFM (0.5 m/s)

30 LFM (0.15 m/s)

400 LFM (2.0 m/s)

300 LFM (1.5 m/s)

200 LFM (1.0 m/s)

100 LFM (0.5 m/s)

30 LFM (0.15 m/s)

5

0

20

30

40

50

60

70

80

90

20

30

40

50

60

70

80

90

Ambient Temperature [°C]

Fig. 1.5V.1: Available load current vs. ambient air

temperature and airflow rates for SQ48T15015 converter

with D height pins mounted vertically with Vin = 48 V, air

flowing from pin 3 to pin 1, and maximum FET

temperature ≤ 120 °C

Fig. 1.5V.2: Available load current vs. ambient air

temperature and airflow rates for SQ48T15015 converter

with D height pins mounted horizontally with Vin = 48 V,

air flowing from pin 3 to pin 1, and maximum FET

temperature ≤ 120 °C.

REV. SEP 14, 2005

Page 48 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

SQ48T/S15015 (1.5 Volt Out)

20

15

10

20

15

10

500 LFM (2.5 m/s)

400 LFM (2.0 m/s)

300 LFM (1.5 m/s)

200 LFM (1.0 m/s)

100 LFM (0.5 m/s)

500 LFM (2.5 m/s)

400 LFM (2.0 m/s)

300 LFM (1.5 m/s)

200 LFM (1.0 m/s)

100 LFM (0.5 m/s)

5

30 LFM (0.15 m/s)

0

20

30

40

50

60

70

80

90

20

30

40

50

60

70

80

90

Ambient Temperature [°C]

Fig. 1.5V.4: Available load current vs. ambient air

temperature and airflow rates for SQ48S15015 converter

mounted horizontally with Vin = 48 V, air flowing from pin

3 to pin 1, and maximum FET temperature ≤ 120 °C.

Fig. 1.5V.3: Available load current vs. ambient air

temperature and airflow rates for SQ48S15015 converter

mounted vertically with Vin = 48 V, air flowing from pin 3

to pin 1, and maximum FET temperature ≤ 120 °C.

0.95

0.90

0.85

0.80

0.95

0.90

0.85

0.80

70 C

55 C

40 C

0.75

72 V

48 V

36 V

0.75

0.70

0.65

0.70

0.65

0

2

4

6

8

10

12

14

16

0

2

4

6

8

10

12

14

16

Load Current [Adc]

Fig. 1.5V.6: Efficiency vs. load current and ambient

temperature for SQ48T/S15015 converter mounted

vertically with Vin = 48 V and air flowing from pin 3 to pin

1 at a rate of 200 LFM (1.0 m/s).

Fig. 1.5V.5: Efficiency vs. load current and input voltage

for SQ48T/S15015 converter mounted vertically with air

flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s)

and Ta = 25 °C.

REV. SEP 14, 2005

Page 49 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

SQ48T/S15015 (1.5 Volt Out)

6.00

5.00

4.00

3.00

2.00

1.00

0.00

6.00

5.00

4.00

3.00

72 V

48 V

36 V

70 C

55 C

40 C

2.00

1.00

0.00

0

2

4

6

8

10

12

14

16

0

2

4

6

8

10

12

14

16

Load Current [Adc]

Fig. 1.5V.7: Power dissipation vs. load current and

input voltage for SQ48T/S15015 converter mounted

vertically with air flowing from pin 3 to pin 1 at a rate of

300 LFM (1.5 m/s) and Ta = 25 °C.

Fig. 1.5V.8: Power dissipation vs. load current and

ambient temperature for SQ48T/S15015 converter

mounted vertically with Vin = 48 V and air flowing from

pin 3 to pin 1 at a rate of 200 LFM (1.0 m/s).

Fig. 1.5V.10: Turn-on transient at full rated load

current (resistive) plus 10,000 µF at Vin = 48 V,

triggered via ON/OFF pin. Top trace: ON/OFF signal

(5 V/div.). Bottom trace: output voltage (0.5 V/div.).

Time scale: 2 ms/div.

Fig. 1.5V.9: Turn-on transient at full rated load current

(resistive) with no output capacitor at Vin = 48 V,

triggered via ON/OFF pin. Top trace: ON/OFF signal

(5 V/div.). Bottom trace: output voltage (0.5 V/div.). Time

scale: 2 ms/div.

REV. SEP 14, 2005

Page 50 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

SQ48T/S15015 (1.5 Volt Out)

Fig. 1.5V.11: Output voltage response to load current

step-change (3.75 A – 7.5 A – 3.75 A) at Vin = 48 V.

Top trace: output voltage (100 mV/div.). Bottom trace:

load current (5 A/div.). Current slew rate: 0.1 A/µs.

Co = 1 µF ceramic. Time scale: 0.2 ms/div.

Fig. 1.5V.12: Output voltage response to load current

step-change (3.75 A – 7.5 A – 3.75 A) at Vin = 48 V.

Top trace: output voltage (100 mV/div.). Bottom trace:

load current (5 A/div.). Current slew rate: 5 A/µs. Co =

450 µF tantalum + 1 µF ceramic. Time scale: 0.2 ms/div.

i_S

i_C

10 µH

source

inductance

TM

33 µF

ESR <1

electrolytic

capacitor

1 µF

ceramic

capacitor

Family

SemiQ

DC-DC

Converter

Ω

Vout

Vsource

Fig. 1.5V.13: Output voltage ripple (20 mV/div.) at full

rated load current into a resistive load with Co = 10 µF

tantalum + 1 µF ceramic and Vin = 48 V. Time scale:

1 µs/div.

Fig. 1.5V.14: Test Setup for measuring input reflected

ripple currents, i_cand i_s.

REV. SEP 14, 2005

Page 51 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

SQ48T/S15015 (1.5 Volt Out)

Fig. 1.5V.16: Input reflected ripple current, i_s

(10 mA/div.), measured through 10 µH at the source at

full rated load current and Vin = 48 V. Refer to

Fig. 1.5V.14 for test setup. Time scale: 1 µs/div.

Fig. 1.5V.15: Input reflected ripple current, i_c

(100 mA/div.), measured at input terminals at full rated

load current and Vin = 48 V. Refer to Fig. 1.5V.14 for

test setup. Time scale: 1 µs/div.

2.0

1.5

1.0

0.5

0

20

0

5

10

15

Iout [Adc]

Fig. 1.5V.18: Load current (top trace, 20 A/div.,

20 ms/div.) into a 10 mꢀ short circuit during restart, at

Vin = 48 V. Bottom trace (20 A/div., 1 ms/div.) is an

expansion of the on-time portion of the top trace.

Fig. 1.5V.17: Output voltage vs. load current showing

current limit point and converter shutdown point. Input

voltage has almost no effect on current limit

characteristic.

REV. SEP 14, 2005

Page 52 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

Electrical Specifications: SQ48T/S15012 (1.2 Volt Out)

Conditions: T_A= 25 ºC, Airflow = 300 LFM (1.5 m/s), Vin = 48 VDC, Vout = 1.2 VDC, unless otherwise specified.

Parameter

Notes

Min

Typ

Max

Units

Input Characteristics

Maximum Input Current

Input Stand-by Current

Input No Load Current (0 load on the output)

Input Reflected-Ripple Current

Input Voltage Ripple Rejection

15 ADC, 1.2 VDC Out @ 36 VDC In

Vin = 48 V, converter disabled

Vin = 48 V, converter enabled

25 MHz bandwidth

0.62

ADC

mADC

mA_PK-PK

dB

2.6

22

6

120 Hz

TBD

Output Characteristics

Output Voltage Set Point (no load)

Output Regulation

Over Line

1.188

1.182

1.200

1.212

VDC

±1

±3

1.218

mV

VDC

Over Load

Output Voltage Range

Output Ripple and Noise - 25 MHz

bandwidth

External Load Capacitance

Output Current Range

Current Limit Inception

Peak Short-Circuit Current

RMS Short-Circuit Current

Over line, load and temperature¹

Full load + 10 µF tantalum + 1 µF

ceramic

30

50

15,000

15

20

40

mV_PK-PK

µF

ADC

A

Plus full load (resistive)

0

Non-latching

Non-latching, Short =10 mꢀ.

Non-latching

15.75

18

30

5.3

Arms

Dynamic Response

Load Change 25% of Iout Max, di/dt = 0.1 A/µs Co = 1 µF ceramic

90

mV

di/dt = 5 A/µs Co = 450 µF tantalum + 1 µF ceramic

120

100

mV

µs

Settling Time to 1%

Efficiency

100% Load

50% Load

82.0

83.0

%

¹-40 ºC to 85 ºC.

20

15

10

5

15

10

500 LFM (2.5 m/s)

400 LFM (2.0 m/s)

300 LFM (1.5 m/s)

200 LFM (1.0 m/s)

100 LFM (0.5 m/s)

30 LFM (0.15 m/s)

400 LFM (2.0 m/s)

300 LFM (1.5 m/s)

200 LFM (1.0 m/s)

100 LFM (0.5 m/s)

30 LFM (0.15 m/s)

5

0

20

30

40

50

60

70

80

90

20

30

40

50

60

70

80

90

Ambient Temperature [°C]

Fig. 1.2V.1: Available load current vs. ambient air

temperature and airflow rates for SQ48T15012 converter

with D height pins mounted vertically with Vin = 48 V, air

flowing from pin 3 to pin 1, and maximum FET

temperature ≤ 120 °C.

Fig. 1.2V.2: Available load current vs. ambient air

temperature and airflow rates for SQ48T15012 converter

with D height pins mounted horizontally with Vin = 48 V,

air flowing from pin 3 to pin 1, and maximum FET

temperature ≤ 120 °C.

REV. SEP 14, 2005

Page 53 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

SQ48T/S15012 (1.2 Volt Out)

20

15

10

20

15

10

500 LFM (2.5 m/s)

400 LFM (2.0 m/s)

300 LFM (1.5 m/s)

200 LFM (1.0 m/s)

100 LFM (0.5 m/s)

500 LFM (2.5 m/s)

400 LFM (2.0 m/s)

300 LFM (1.5 m/s)

200 LFM (1.0 m/s)

100 LFM (0.5 m/s)

5

30 LFM (0.15 m/s)

0

20

30

40

50

60

70

80

90

20

30

40

50

60

70

80

90

Ambient Temperature [°C]

Fig. 1.2V.4: Available load current vs. ambient air

temperature and airflow rates for SQ48S15012 converter

mounted horizontally with Vin = 48 V, air flowing from pin

3 to pin 1, and maximum FET temperature ≤ 120 °C.

Fig. 1.2V.3: Available load current vs. ambient air

temperature and airflow rates for SQ48S15012 converter

mounted vertically with Vin = 48 V, air flowing from pin 3

to pin 1, and maximum FET temperature ≤ 120 °C.

0.90

0.85

0.80

0.75

0.90

0.85

0.80

0.75

70 C

55 C

40 C

0.70

72 V

48 V

36 V

0.70

0.65

0.60

0.65

0.60

0

2

4

6

8

10

12

14

16

0

2

4

6

8

10

12

14

16

Load Current [Adc]

Fig. 1.2V.6: Efficiency vs. load current and ambient

temperature for SQ48T/S15012 converter mounted

vertically with Vin = 48 V and air flowing from pin 3 to pin

1 at a rate of 200 LFM (1.0 m/s).

Fig. 1.2V.5: Efficiency vs. load current and input voltage for

SQ48T/S15012 converter mounted vertically with air

flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s)

and Ta = 25 °C.

REV. SEP 14, 2005

Page 54 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

SQ48T/S15012 (1.2 Volt Out)

5.00

4.00

3.00

2.00

1.00

0.00

5.00

4.00

3.00

2.00

72 V

48 V

36 V

70 C

55 C

40 C

1.00

0.00

0

2

4

6

8

10

12

14

16

0

2

4

6

8

10

12

14

16

Load Current [Adc]

Fig. 1.2V.7: Power dissipation vs. load current and

input voltage for SQ48T/S15012 converter mounted

vertically with air flowing from pin 3 to pin 1 at a rate of

300 LFM (1.5 m/s) and Ta = 25 °C.

Fig. 1.2V.8: Power dissipation vs. load current and

ambient temperature for SQ48T/S15012 converter

mounted vertically with Vin = 48 V and air flowing from

pin 3 to pin 1 at a rate of 200 LFM (1.0 m/s).

Fig. 1.2V.10: Turn-on transient at full rated load

current (resistive) plus 10,000 µF at Vin = 48 V,

triggered via ON/OFF pin. Top trace: ON/OFF signal

(5 V/div.). Bottom trace: output voltage (0.5 V/div.).

Time scale: 2 ms/div.

Fig. 1.2V.9: Turn-on transient at full rated load current

(resistive) with no output capacitor at Vin = 48 V,

triggered via ON/OFF pin. Top trace: ON/OFF signal

(5 V/div.). Bottom trace: output voltage (0.5 V/div.). Time

scale: 2 ms/div.

REV. SEP 14, 2005

Page 55 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

SQ48T/S15012 (1.2 Volt Out)

Fig. 1.2V.11: Output voltage response to load current

step-change (3.75 A – 7.5 A – 3.75 A) at Vin = 48 V.

Top trace: output voltage (100 mV/div.). Bottom trace:

load current (5 A/div.). Current slew rate: 0.1 A/µs.

Co = 1 µF ceramic. Time scale: 0.2 ms/div.

Fig. 1.2V.12: Output voltage response to load current

step-change (3.75 A – 7.5 A – 3.75 A) at Vin = 48 V.

Top trace: output voltage (100 mV/div.). Bottom trace:

load current (5 A/div.). Current slew rate: 5 A/µs. Co =

450 µF tantalum + 1 µF ceramic. Time scale: 0.2 ms/div.

i_S

i_C

10 µH

source

inductance

TM

33 µF

ESR <1

electrolytic

capacitor

1 µF

ceramic

capacitor

Family

SemiQ

DC-DC

Converter

Ω

Vout

Vsource

Fig. 1.2V.13: Output voltage ripple (20 mV/div.) at full

rated load current into a resistive load with Co = 10 µF

tantalum + 1 µF ceramic and Vin = 48 V. Time scale:

1 µs/div.

Fig. 1.2V.14: Test Setup for measuring input reflected

ripple currents, i_cand i_s.

REV. SEP 14, 2005

Page 56 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

SQ48T/S15012 (1.2 Volt Out)

Fig. 1.2V.15: Input reflected ripple current, i_c

(100 mA/div.), measured at input terminals at full rated

load current and Vin = 48 V. Refer to Fig. 1.2V.14 for

test setup. Time scale: 1 µs/div.

Fig. 1.2V.16: Input reflected ripple current, i_s

(10 mA/div.), measured through 10 µH at the source at

full rated load current and Vin = 48 V. Refer to

Fig. 1.2V.14 for test setup. Time scale: 1 µs/div.

1.5

1.0

0.5

0

20

0

5

10

15

Iout [Adc]

Fig. 1.2V.18: Load current (top trace, 20 A/div.,

20 ms/div.) into a 10 mꢀ short circuit during restart, at

Vin = 48 V. Bottom trace (20 A/div., 1 ms/div.) is an

expansion of the on-time portion of the top trace.

Fig. 1.2V.17: Output voltage vs. load current showing

current limit point and converter shutdown point. Input

voltage has almost no effect on current limit

characteristic.

REV. SEP 14, 2005

Page 57 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

Electrical Specifications: SQ48T/S15010 (1.0 Volt Out)

Conditions: T_A= 25 ºC, Airflow = 300 LFM (1.5 m/s), Vin = 48 VDC, Vout = 1.0 VDC, unless otherwise specified.

Parameter

Notes

Min

Typ

Max

Units

Input Characteristics

Maximum Input Current

Input Stand-by Current

Input No Load Current (0 load on the output)

Input Reflected-Ripple Current

Input Voltage Ripple Rejection

15 ADC, 1.0 VDC Out @ 36 VDC In

Vin = 48 V, converter disabled

Vin = 48 V, converter enabled

25 MHz bandwidth

ADC

mADC

mA_PK-PK

dB

0.52

3

22

7.5

TBD

120 Hz

Output Characteristics

Output Voltage Set Point (no load)

Output Regulation

Over Line

VDC

0.990

0.985

1.000

1.010

mV

VDC

±1

±2

±3

Over Load

Output Voltage Range

Output Ripple and Noise - 25 MHz

bandwidth

External Load Capacitance

Output Current Range

Current Limit Inception

Peak Short-Circuit Current

RMS Short-Circuit Current

Over line, load and temperature¹

Full load + 10 µF tantalum + 1 µF

ceramic

1.015

mV_PK-PK

µF

ADC

A

30

50

15,000

15

Plus full load (resistive)

0

Non-latching

Non-latching, Short =10 mꢀ.

Non-latching

15.75

18

30

20

40

Arms

5.3

Dynamic Response

Load Change 25% of Iout Max, di/dt = 0.1 A/µs Co = 1 µF ceramic

mV

80

di/dt = 5 A/µs Co = 450 µF tantalum + 1 µF ceramic

mV

µs

140

100

Settling Time to 1%

Efficiency

100% Load

50% Load

%

80.5

81.0

¹-40 ºC to 85 ºC.

20

15

10

5

15

10

500 LFM (2.5 m/s)

400 LFM (2.0 m/s)

300 LFM (1.5 m/s)

200 LFM (1.0 m/s)

100 LFM (0.5 m/s)

30 LFM (0.15 m/s)

400 LFM (2.0 m/s)

300 LFM (1.5 m/s)

200 LFM (1.0 m/s)

100 LFM (0.5 m/s)

30 LFM (0.15 m/s)

5

0

20

30

40

50

60

70

80

90

20

30

40

50

60

70

80

90

Ambient Temperature [°C]

Fig. 1.0V.1: Available load current vs. ambient air

temperature and airflow rates for SQ48T15010 converter

with D height pins mounted vertically with Vin = 48 V, air

flowing from pin 3 to pin 1, and maximum FET

temperature ≤ 120 °C.

Fig. 1.0V.2: Available load current vs. ambient air

temperature and airflow rates for SQ48T15010 converter

with D height pins mounted horizontally with Vin = 48 V,

air flowing from pin 3 to pin 1, and maximum FET

temperature ≤ 120 °C.

REV. SEP 14, 2005

Page 58 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

SQ48T/S15010 (1.0 Volt Out)

20

15

10

20

15

10

500 LFM (2.5 m/s)

400 LFM (2.0 m/s)

300 LFM (1.5 m/s)

200 LFM (1.0 m/s)

100 LFM (0.5 m/s)

500 LFM (2.5 m/s)

400 LFM (2.0 m/s)

300 LFM (1.5 m/s)

200 LFM (1.0 m/s)

100 LFM (0.5 m/s)

5

30 LFM (0.15 m/s)

0

20

30

40

50

60

70

80

90

20

30

40

50

60

70

80

90

Ambient Temperature [°C]

Fig. 1.0V.4: Available load current vs. ambient air

temperature and airflow rates for SQ48S15010 converter

mounted horizontally with Vin = 48 V, air flowing from pin

3 to pin 1, and maximum FET temperature ≤ 120 °C.

Fig. 1.0V.3: Available load current vs. ambient air

temperature and airflow rates for SQ48S15010 converter

mounted vertically with Vin = 48 V, air flowing from pin 3

to pin 1, and maximum FET temperature ≤ 120 °C.

0.90

0.85

0.80

0.75

0.90

0.85

0.80

0.75

70 C

55 C

40 C

0.70

72 V

48 V

36 V

0.70

0.65

0.60

0.65

0.60

0

2

4

6

8

10

12

14

16

0

2

4

6

8

10

12

14

16

Load Current [Adc]

Fig. 1.0V.6: Efficiency vs. load current and ambient

temperature for SQ48T/S15010 converter mounted

vertically with Vin = 48 V and air flowing from pin 3 to pin

1 at a rate of 200 LFM (1.0 m/s).

Fig. 1.0V.5: Efficiency vs. load current and input voltage for

SQ48T/S15010 converter mounted vertically with air

flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s)

and Ta = 25 °C.

REV. SEP 14, 2005

Page 59 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

SQ48T/S15010 (1.0 Volt Out)

5.00

4.00

3.00

2.00

1.00

0.00

5.00

4.00

3.00

2.00

72 V

48 V

36 V

70 C

55 C

40 C

1.00

0.00

0

2

4

6

8

10

12

14

16

0

2

4

6

8

10

12

14

16

Load Current [Adc]

Fig. 1.0V.7: Power dissipation vs. load current and

input voltage for SQ48T/S15010 converter mounted

vertically with air flowing from pin 3 to pin 1 at a rate of

300 LFM (1.5 m/s) and Ta = 25 °C.

Fig. 1.0V.8: Power dissipation vs. load current and

ambient temperature for SQ48T/S15010 converter

mounted vertically with Vin = 48 V and air flowing from

pin 3 to pin 1 at a rate of 200 LFM (1.0 m/s).

Fig. 1.0V.9: Turn-on transient at full rated load current

(resistive) with no output capacitor at Vin = 48 V,

triggered via ON/OFF pin. Top trace: ON/OFF signal

(5 V/div.). Bottom trace: output voltage (0.5 V/div.). Time

scale: 2 ms/div.

Fig. 1.0V.10: Turn-on transient at full rated load

current (resistive) plus 10,000 µF at Vin = 48 V,

triggered via ON/OFF pin. Top trace: ON/OFF signal

(5 V/div.). Bottom trace: output voltage (0.5 V/div.).

Time scale: 2 ms/div.

REV. SEP 14, 2005

Page 60 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

SQ48T/S15010 (1.0 Volt Out)

Fig. 1.0V.11: Output voltage response to load current

step-change (3.75 A – 7.5 A – 3.75 A) at Vin = 48 V.

Top trace: output voltage (100 mV/div.). Bottom trace:

load current (5 A/div.). Current slew rate: 0.1 A/µs.

Co = 1 µF ceramic. Time scale: 0.2 ms/div.

Fig. 1.0V.12: Output voltage response to load current

step-change (3.75 A – 7.5 A – 3.75 A) at Vin = 48 V.

Top trace: output voltage (100 mV/div.). Bottom trace:

load current (5 A/div.). Current slew rate: 5 A/µs. Co =

450 µF tantalum + 1 µF ceramic. Time scale: 0.2 ms/div.

i_S

i_C

10 µH

source

inductance

TM

33 µF

ESR <1

electrolytic

capacitor

1 µF

ceramic

capacitor

Family

SemiQ

DC-DC

Converter

Ω

Vout

Vsource

Fig. 1.0V.13: Output voltage ripple (20 mV/div.) at full

rated load current into a resistive load with Co = 10 µF

tantalum + 1 µF ceramic and Vin = 48 V. Time scale:

1 µs/div.

Fig. 1.0V.14: Test Setup for measuring input reflected

ripple currents, i_cand i_s.

REV. SEP 14, 2005

Page 61 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

SQ48T/S15010 (1.0 Volt Out)

Fig. 1.0V.15: Input reflected ripple current, i_c

(100 mA/div.), measured at input terminals at full rated

load current and Vin = 48 V. Refer to Fig. 1.0V.14 for

test setup. Time scale: 1 µs/div.

Fig. 1.0V.16: Input reflected ripple current, i_s

(10 mA/div.), measured through 10 µH at the source at

full rated load current and Vin = 48 V. Refer to

Fig. 1.0V.14 for test setup. Time scale: 1 µs/div.

1.5

1.0

0.5

0

20

0

5

10

15

Iout [Adc]

Fig. 1.0V.18: Load current (top trace, 20 A/div.,

20 ms/div.) into a 10 mꢀ short circuit during restart, at

Vin = 48 V. Bottom trace (20 A/div., 1 ms/div.) is an

expansion of the on-time portion of the top trace.

Fig. 1.0V.17: Output voltage vs. load current showing

current limit point and converter shutdown point. Input

voltage has almost no effect on current limit

characteristic.

REV. SEP 14, 2005

Page 62 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

Physical Information

SQ48S Platform Notes

•

All dimensions are in inches [mm]

Connector Material: Copper

Connector Finish: Gold over Nickel

Converter Weight: 0.66 oz [18.5 g]

Recommended Surface-Mount Pads:

Min. 0.080” X 0.112” [2.03 x 2.84]

Max. 0.092” X 0.124” [2.34 x 3.15]

1

2

3

8

7

6

5

4

TOP VIEW

SIDE VIEW

Pad/Pin Connections

Pad/Pin #

Function

1

2

3

4

5

6

7

8

Vin (+)

ON/OFF

Vin (-)

SQ48S Pinout (Surface Mount)

Vout (-)

SENSE(-)

TRIM

SENSE(+)

Vout (+)

1

2

3

8

7

6

5

4

TOP VIEW

SIDE VIEW

SQ48T Platform Notes

•

All dimensions are in inches [mm]

Pins 1-3 and 5-7 are Ø 0.040” [1.02]

with Ø 0.078” [1.98] shoulder

Pins 4 and 8 are Ø 0.062” [1.57]

without shoulder

•

Pin material: Brass

SQ48T Pinout (Through-hole)

Pin Finish: Tin/Lead over Nickel or

Matte Tin over Nickel for “G” version

Converter Weight: 0.53 oz [15 g]

•

HT

CL

PL

Option

Height

(Max. Height) (Min. Clearance)

Option +0.000 [+0.00]

Pin Length

+0.016 [+0.41]

-0.000 [- 0.00]

±0.005 [±0.13]

-0.038 [- 0.97]

A

B

C

0.188 [4.77]

0.145 [3.68]

0.110 [2.79]

A

B

C

D

E

0.303 [7.69]

0.336 [8.53]

0.500 [12.70]

0.400 [10.16]

0.282 [7.16]

0.030 [0.77]

0.063 [1.60]

0.227 [5.77]

0.127 [3.23]

0.009 [0.23]

REV. SEP 14, 2005

Page 63 of 64

www.power-one.com

SQ48 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-12 VDC Output

Converter Part Numbering Ordering Information

Length

[PL]

Product

Series

Input

Voltage

Mounting

Scheme

Rated Load

Current

Output

Voltage

ON/OFF

Logic

Maximum

Height [HT]

Special

Features

Environ-

mental

SQ

48

T

15

012

-

N

B

A

0

15 ⇒ 15 A

(1.0 - 3.3 V)

010 ⇒ 1.0 V

012 ⇒ 1.2 V

015 ⇒ 1.5 V

018 ⇒ 1.8 V

020 ⇒ 2.0 V

025 ⇒ 2.5 V

033 ⇒ 3.3 V

050 ⇒ 5.0 V

060 ⇒ 6.0 V

080 ⇒ 8.0 V

120 ⇒ 12.0 V

SMT

S ⇒ 0.273”

SMT

0 ⇒ 0.00”

0 ⇒ STD

10 ⇒ 10 A

(5.0 V)

N ⇒

S ⇒

Negative

Surface

Mount

One-

Eighth

Brick

G ⇒ RoHS

Compliant

with Pb

Through

hole

08 ⇒ 8 A

(6.0 V)

36-75 V

T ⇒

Alternative

Trim

A ⇒ 0.303”

B ⇒ 0.336”

C ⇒ 0.500”

D ⇒ 0.400”

E ⇒ 0.282”

Through

hole

A ⇒ 0.188”

B ⇒ 0.145”

C ⇒ 0.110”

T⇒

Through-

hole

Format

free solder

P ⇒

Positive

05 ⇒ 5.3 A

(8.0 V)

Option

(For 1.2 V,

1.0 V only)

04 ⇒ 4 A

(12.0 V)

The example above describes P/N SQ48T15012-NBA0: 36-75 V input, through-hole mounting, 15 A @ 1.2 V output, negative ON/OFF logic,

a maximum height of 0.336”, a through the board pin length of 0.188”, standard trim equations, and Eutectic Tin/Lead solder¹. Please consult

factory for the complete list of available options.

¹The solder exemption is for customers choosing to use the exemptions for lead in solders for servers, storage and storage array systems,

and network infrastructure equipment for switching, signaling, transmission, and network management for telecommunications.

NUCLEAR AND MEDICAL APPLICATIONS - Power-One products are not designed, intended for use in, or authorized for use as critical

components in life support systems, equipment used in hazardous environments, or nuclear control systems without the express written

consent of the respective divisional president of Power-One, Inc.

TECHNICAL REVISIONS - The appearance of products, including safety agency certifications pictured on labels, may change depending on

the date manufactured. Specifications are subject to change without notice.

REV. SEP 14, 2005

Page 64 of 64

www.power-one.com


型号：	SQ48S10012-NS00G
厂家：	BEL FUSE INC.
描述：	DC-DC Regulated Power Supply Module, 1 Output, Hybrid, ROHS COMPLIANT
文件：	总64页 (文件大小：985K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

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