SQ48S10025-NS00G [BEL]
DC-DC Regulated Power Supply Module, 1 Output, Hybrid, ROHS COMPLIANT;型号: | SQ48S10025-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 |
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.
1 The 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: TA = 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
VDC
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
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 VOUT(NOM)
-20
-10
+10
+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
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
VDC
2.4
-20
20
VDC
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 VOUT(NOM), in order to ensure specified operation of overvoltage protection circuitry.
REV. SEP 14, 2005
Page 2 of 64
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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
www.power-one.com
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, RT-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
R
R
T−DECR
T−DECR
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, RT-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 + ∆)VO−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
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
RT-DECR
SENSE (-)
Vout (-)
(VO-REQ − VO-NOM)
∆ =
X 100 [%]
VO-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 VOUT(NOM), or:
TM
Family
SemiQ
Vin (+)
ON/OFF
Vin (-)
Vout (+)
SENSE (+)
TRIM
Converter
(Top View)
RT-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
www.power-one.com
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 VIN. See Figure F.
ON/OFF
STATE
OFF
Time
Comments
t0
ON/OFF pin is ON; system front end power is
toggled on, VIN to converter begins to rise.
VIN crosses Undervoltage Lockout protection
circuit threshold; converter enabled.
Converter begins to respond to turn-on
command (converter turn-on delay).
ON
t1
t2
t3
VOUT
Converter VOUT reaches 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 VIN previously powered, converter started via
ON/OFF pin. See Figure G.
VIN
Time
t0
t1
Comments
VINPUT at nominal value.
Arbitrary time when ON/OFF pin is enabled
(converter enabled).
ON/OFF
STATE
t2
t3
End of converter turn-on delay.
Converter VOUT reaches 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 VIN previously powered, converter is disabled and
then enabled via ON/OFF pin. See Figure H.
Time
t0
Comments
t
t0
t1 t2
t3
VIN and VOUT are 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.
VOUT
t4
t5
Converter VOUT reaches 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
www.power-one.com
SQ48 DC-DC Series Data Sheet
36-75 VDC Input; 1.0-12 VDC Output
Electrical Specifications: SQ48T/S04120 (12 Volt Out)
Conditions: TA = 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
mADC
mAPK-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
±4
±5
±5
mV
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
mVPK-PK
µF
ADC
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
87.0
%
%
1
-40 ºC to 85 ºC.
5
4
3
5
4
3
2
1
0
500 LFM (2.5 m/s)
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]
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
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
2
300 LFM (1.5
200 LFM (1.0 m
100 LFM (0.5 m/s
300 LFM (1)
200 LFM (1.0
10L(0.5 ms)
1
1
3FM m/s)
30 L.15 m/s)
0
0
20
30
40
50
60
70
80
90
20
30
40
50
60
70
80
90
Ambient Temperature [°C]
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]
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]
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.
iS
iC
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, ic and is.
REV. SEP 14, 2005
Page 11 of 64
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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, is
(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, ic
(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
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SQ48 DC-DC Series Data Sheet
36-75 VDC Input; 1.0-12 VDC Output
Electrical Specifications: SQ48T/S05080 (8.0 Volt Out)
Conditions: TA = 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
mADC
mAPK-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
±4
±10
±10
8.120
mV
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
mVPK-PK
µF
ADC
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]
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
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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 (s)
200 LFM (1.
100 LFM (0.5 s)
0 L0.15 m/s)
2
1
0
300 LFM (1)
200 LFM (1.0
10L(0.5 ms)
30 L.15 m/s)
20
30
40
50
60
70
80
90
20
30
40
50
60
70
80
90
Ambient Temperature [°C]
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]
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]
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.
iS
iC
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, ic and is.
REV. SEP 14, 2005
Page 16 of 64
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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, is
(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, ic
(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: TA = 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
mADC
mAPK-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
±2
±5
±5
6.090
mV
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
mVPK-PK
µF
ADC
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
89.0
%
%
1 -40 ºC to 85 ºC.
10
8
10
8
6
6
500 LFM (2.5 m/s)
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]
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
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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
6
500 LFM (2.5 m/s)
400 LFM (2.0 m/s
300 LFM (s)
200 LFM (1.
100 LFM (0.5 s)
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1)
200 LFM (1.0
10L(0.5 ms)
4
4
2
2
0 L0.15 m/s)
30 L.15 m/s)
0
0
20
30
40
50
60
70
80
90
20
30
40
50
60
70
80
90
Ambient Temperature [°C]
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]
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
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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]
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
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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.
iS
iC
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, ic and is.
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, is
(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, ic
(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: TA = 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
mADC
mAPK-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
±2
±5
±5
5.075
mV
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
mVPK-PK
µF
ADC
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
6
500 LFM (2.5 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)
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]
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
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]
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]
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
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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]
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.
iS
iC
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, ic and is.
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, is
(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, ic
(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
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
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SQ48 DC-DC Series Data Sheet
36-75 VDC Input; 1.0-12 VDC Output
Electrical Specifications: SQ48T/S15033 (3.3 Volt Out)
Conditions: TA = 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
mADC
mAPK-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
±2
±5
±5
3.350
mV
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
mVPK-PK
µF
ADC
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
89.5
%
%
1 -40 ºC to 85 ºC.
20
20
15
10
5
15
10
500 LFM (2.5 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)
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
0
20
30
40
50
60
70
80
90
20
30
40
50
60
70
80
90
Ambient Temperature [°C]
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
5
30 LFM (0.15 m/s)
30 LFM (0.15 m/s)
0
0
20
30
40
50
60
70
80
90
20
30
40
50
60
70
80
90
Ambient Temperature [°C]
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]
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
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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]
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.
iS
iC
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, ic and is.
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, ic
(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, is
(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: TA = 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
mADC
mAPK-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
±2
±5
±5
2.538
mV
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
mVPK-PK
µF
ADC
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
20
15
10
5
15
10
500 LFM (2.5 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)
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
0
20
30
40
50
60
70
80
90
20
30
40
50
60
70
80
90
Ambient Temperature [°C]
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
5
30 LFM (0.15 m/s)
30 LFM (0.15 m/s)
0
0
20
30
40
50
60
70
80
90
20
30
40
50
60
70
80
90
Ambient Temperature [°C]
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]
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]
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.
iS
iC
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, ic and is.
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, ic
(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, is
(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: TA = 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
mADC
mAPK-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
±2
±5
±5
2.030
mV
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
mVPK-PK
µF
ADC
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
60
mV
µs
Settling Time to 1%
Efficiency
100% Load
50% Load
86.5
87.0
%
%
1 -40 ºC to 85 ºC.
20
20
15
10
5
15
10
500 LFM (2.5 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)
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
0
20
30
40
50
60
70
80
90
20
30
40
50
60
70
80
90
Ambient Temperature [°C]
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
5
30 LFM (0.15 m/s)
30 LFM (0.15 m/s)
0
0
20
30
40
50
60
70
80
90
20
30
40
50
60
70
80
90
Ambient Temperature [°C]
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]
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]
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.
iS
iC
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, ic and is.
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, ic
(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, is
(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
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SQ48 DC-DC Series Data Sheet
36-75 VDC Input; 1.0-12 VDC Output
Electrical Specifications: SQ48T/S15018 (1.8 Volt Out)
Conditions: TA = 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
mADC
mAPK-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
±2
±4
±5
1.827
mV
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
mVPK-PK
µF
ADC
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
100
mV
µs
Settling Time to 1%
Efficiency
100% Load
50% Load
85.5
86.0
%
%
1 -40 ºC to 85 ºC.
20
20
15
10
5
15
10
500 LFM (2.5 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)
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
0
20
30
40
50
60
70
80
90
20
30
40
50
60
70
80
90
Ambient Temperature [°C]
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
5
30 LFM (0.15 m/s)
30 LFM (0.15 m/s)
0
0
20
30
40
50
60
70
80
90
20
30
40
50
60
70
80
90
Ambient Temperature [°C]
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]
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
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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]
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.
iS
iC
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, ic and is.
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, ic
(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, is
(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
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SQ48 DC-DC Series Data Sheet
36-75 VDC Input; 1.0-12 VDC Output
Electrical Specifications: SQ48T/S15015 (1.5 Volt Out)
Conditions: TA = 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
mADC
mAPK-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
±2
±4
±4
1.523
mV
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
mVPK-PK
µF
ADC
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
20
15
10
5
15
10
500 LFM (2.5 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)
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
0
20
30
40
50
60
70
80
90
20
30
40
50
60
70
80
90
Ambient Temperature [°C]
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
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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
5
30 LFM (0.15 m/s)
30 LFM (0.15 m/s)
0
0
20
30
40
50
60
70
80
90
20
30
40
50
60
70
80
90
Ambient Temperature [°C]
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]
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
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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]
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
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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.
iS
iC
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, ic and is.
REV. SEP 14, 2005
Page 51 of 64
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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, is
(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, ic
(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
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SQ48 DC-DC Series Data Sheet
36-75 VDC Input; 1.0-12 VDC Output
Electrical Specifications: SQ48T/S15012 (1.2 Volt Out)
Conditions: TA = 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
mADC
mAPK-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
±1
±3
±3
1.218
mV
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
mVPK-PK
µF
ADC
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
20
15
10
5
15
10
500 LFM (2.5 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)
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
0
20
30
40
50
60
70
80
90
20
30
40
50
60
70
80
90
Ambient Temperature [°C]
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
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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
5
30 LFM (0.15 m/s)
30 LFM (0.15 m/s)
0
0
20
30
40
50
60
70
80
90
20
30
40
50
60
70
80
90
Ambient Temperature [°C]
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]
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
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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]
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
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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.
iS
iC
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, ic and is.
REV. SEP 14, 2005
Page 56 of 64
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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, ic
(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, is
(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
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SQ48 DC-DC Series Data Sheet
36-75 VDC Input; 1.0-12 VDC Output
Electrical Specifications: SQ48T/S15010 (1.0 Volt Out)
Conditions: TA = 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
mADC
mAPK-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
mV
VDC
±1
±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
mVPK-PK
µF
ADC
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
20
15
10
5
15
10
500 LFM (2.5 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)
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
0
20
30
40
50
60
70
80
90
20
30
40
50
60
70
80
90
Ambient Temperature [°C]
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
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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
5
30 LFM (0.15 m/s)
30 LFM (0.15 m/s)
0
0
20
30
40
50
60
70
80
90
20
30
40
50
60
70
80
90
Ambient Temperature [°C]
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]
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
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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]
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
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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.
iS
iC
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, ic and is.
REV. SEP 14, 2005
Page 61 of 64
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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, ic
(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, is
(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
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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
Pin
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
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SQ48 DC-DC Series Data Sheet
36-75 VDC Input; 1.0-12 VDC Output
Converter Part Numbering Ordering Information
Pin
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.
1 The 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
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