ULQ-3.3/20-D24N-C_技术文档

ULQ Models

www.murata-ps.com

Single Output, Low-Proﬁle, Quarter-Brick

8-25 Amp Isolated DC-DC Converters

To Be Discontinued*

Typical units

Features

For applications requiring improved electrical and thermal perfomance at reduced cost DATEL's

new ULQ Series "Quarter-Brick" DC-DC Converters suit perfectly. They measure just 1.45 x 2.30 x

0.35 inches (36.8 x 58.4 x 8.9mm) and ﬁt the industry-standard footprint. You can also "pick-and-

place" the ULQ-SMT version optimizing your automated SMT process.

From an 18-36V or 36-75V input, ULQ's deliver outputs of 1.2, 1.5, 1.8, or 2V fully rated at 15 or

25A, 2.5 or 3.3V at 15 or 20A, 5V at 15A and 12V at 8-10A. They

employ an interleaved, synchronous-rectiﬁer topology that exploits 100% of their duty cycle. They

simultaneously achieve ultra-high efﬁciency (to 91%), tight line/load regulation ( 0.125/0.25%), low

noise (25-70mVp-p), and quick step response (200µsec).

A state of the art, single-board, open-frame design with reduced component count, high

efﬁciency, low-on-resistance FET's, and planar magnetics embedded in heavy-copper pc boards all

contribute to impressive thermal derating.

■

Standard quarter-brick package/pinout

in through-hole or SMT version

■

Low cost; Low proﬁle, 0.35" (8.9mm)

■

24V and 48V nominal inputs

■

Output current: 8 to 25 Amps

■

Output voltages: 1.2/1.5/1.8/2/2.5/3.3/5/12V

■

Interleaved synchronous-rectiﬁer topology

·

Ultra high efﬁciency

No output reverse conduction

■

Outstanding thermal performance

On/off control, trim & sense functions

Fully isolated, 2250Vdc (BASIC)

Output overvoltage protection

Fully I/O protected; Thermal shutdown

UL/EN/IEC60950 safety approvals

Qual/HALT/EMI tested

The ULQ's feature set includes high isolation (2250Vdc), input pi ﬁlters, input undervoltage shut-

down, output overvoltage protection, current limiting, short-circuit protection and thermal shutdown.

The standard footprint carries on/off control (positive or negative logic), output trim (+10/–20%) and

output sense functions.

All ULQ quarter-bricks are designed to meet the BASIC-insulation requirements of UL/EN/

IEC60950 and they will carry the CE mark. Safety certiﬁcations, EMC compliance testing and qualiﬁ-

cation testing (including HALT) are currently in progress. Contact DATEL for latest updates.

+SENSE

(7)

+V^OUT

(8)

+V^IN

(1)

SWITCH

CONTROL

–V^OUT

(4)

–VIN

(3)

–SENSE

(5)

PWM

CONTROLLER

OPTO

ISOLATION

REFERENCE &

ERROR AMP

VOUT

TRIM

(6)

INPUT UNDERVOLTAGE, INPUT

OVERVOLTAGE, AND OUTPUT

OVERVOLTAGE COMPARATORS

* Can be ordered with positive (standard) or negative (optional) polarity.

REMOTE

ON/OFF

CONTROL*

(2)

Figure 1. Simpliﬁed Schematic

Typical topology is shown.

For full details go to

www.murata-ps.com/rohs

www.murata-ps.com/support

Typical topology is shown

MDC_ULQ-15A.E04 Page 1 of 17

ULQ Models

Single Output, Low-Proﬁle, Quarter-Brick

8-25 Amp Isolated DC-DC Converters

Performance Speciﬁcations and Ordering Guide ➀

ORDERING GUIDE

Output

R/N (mVp-p) ➁

Input

Package

(Case,

Efﬁciency

Regulation (Max.)

Root Model ➄

V^out

VⁱⁿNom. Range

I^out➁

I^IN➃

Pinout)

(Volts)

(Volts) (Volts) (mA/A)

35/0.5

50/1.8 85.5%

30/0.9 85%

(Amps)

Typ.

25

50

45

25

50

70

25

50

70

35

45

50

45

50

95

90

45

50

45

50

95

90

Max.

50

Line

Min.

87%

Typ.

89%

Load ➂

0.25%

0.4%

ULQ-1.5/15-D48N-C

ULQ-1.5/25-D24P-C

ULQ-1.5/25-D48N-C

ULQ-1.8/15-D48N-C

ULQ-1.8/25-D24P-C

ULQ-1.8/25-D48N-C

ULQ-2/15-D48N-C

ULQ-2/25-D24P-C

ULQ-2/25-D48N-C

ULQ-2.5/15-D48N-C

ULQ-3.3/15-D48NM-C

ULQ-3.3/20-D24PM-C

ULQ-3.3/20-D48NM-C

ULQ-5/15-D24PM-C

ULQ-5/15-D48NM-C

ULQ-12/8-D24PM-C

ULQ-12/10-D48NM-C

ULQ-3.3/15-D48N-C

ULQ-3.3/20-D24P-C

ULQ-3.3/20-D48N-C

ULQ-5/15-D24P-C

ULQ-5/15-D48N-C

ULQ-12/8-D24P-C

ULQ-12/10-D48N-C

1.5

1.8

2

15

25

15

25

15

25

15

20

15

8

0.125%

0.25%

0.125%

0.25%

0.125%

0.25%

0.1%

48

24

48

24

48

24

48

24

48

24

48

24

48

24

48

24

48

24

48

36-75

18-36

36-75

18-36

36-75

18-36

36-75

18-36

36-75

18-36

36-75

18-36

36-75

18-36

36-75

18-36

36-75

18-36

36-75

C37, P32

100

75

87.5%

87%

C37, P32

50

35/0.6 87.5%

90/2.2 85.5%

45/1.1 85.5%

89%

C37, P32

100

50

87.5%

89%

C37, P32

45/0.6

50/2.4

50/1.2

45/0.9

87%

86%

88%

C37, P32

2

100

55

88%

C37, P32

2

88%

C37, P32

2.5

3.3

5

89.5%

90.5%

89.5%

90%

C37/C40, P32

75

45/1.2 88.5%

80/3.1 87.5%

100

75

45/1.6

50/3.5

50/1.7

90/4.4

80/2.9

88%

89%

88%

100

130

75

91%

5

91%

12

3.3

5

0.25%

0.125%

0.25%

0.1%

0.25%

0.4%

90.5%

90%

10

15

20

15

8

45/1.2 88.5%

80/3.1 87.5%

90.5%

89.5%

90%

100

75

To Be Discontinued*

45/1.6

50/3.5

50/1.7

90/4.4

80/2.9

88%

89%

88%

100

130

91%

5

91%

12

0.25%

90.5%

90%

To Be Discontinued*

10

*LAST TIME BUY: 4/1/2018. CLICK HERE FOR DISCONTINUANCE NOTICES.

➀ Typical at TA = +25°C under nominal line voltage and full-load conditions. All models are

speciﬁed with an external 1µF multi-layer ceramic and 10µF capacitors across their output pins.

➁ Ripple/Noise (R/N) measured over a 20MHz bandwidth.

➃ Nominal line voltage, no load/full load condition.

➄ Please refer to the Part Number Structure when ordering.

➅ Not all model number combinations are available. Consult Murata Power Solutions.

➂ Devices have no minimum-load requirements and will regulate under no-load conditions.

Regulation speciﬁcations describe the output voltage deviation as the line voltage or load is

varied from its nominal/midpoint value to either extreme. (Load step = 50%.)

ULQ-12/8-D24N-C

ULQ-12/8-D24NL1-C

ULQ-12/8-D24NL2-C

ULQ-12/8-D24P-C

ULQ-12/8-D24PL1-C

ULQ-3.3/15-D48N-C

ULQ-3.3/15-D48P-C

ULQ-3.3/15-D48PL1-C

ULQ-12/10-D48NL2-C

ULQ-3.3/20-D24N-C

ULQ-3.3/20-D24NL2-C

ULQ-3.3/20-D24P-C

ULQ-3.3/20-D24PL1-C

ULQ-12/10-D48PL2-C

ULQ-3.3/20-D24PL2-C

ULQ-5/15-D48N-C

ULQ-5/15-D48P-C

ULQ-5/15-D48PL2-C

ULQ-12/10-D48NL1-C

P A R T N U M B E R S T R U C T U R E

- C

RoHS-6 compliant

U LQ - 3.3 / 20 D48 N M Lx

-

Output

Conﬁguration

Pin Length Option

Quarter-Brick Package

Nominal Output Voltage

Surface-Mount Package

(see list above)

Maximum Rated Output

Remote On/Off Control Logic

Input Voltage Range

See page 16 for complete Part Number Structure.

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MDC_ULQ-15A.E04 Page 2 of 17

ULQ Models

Single Output, Low-Proﬁle, Quarter-Brick

8-25 Amp Isolated DC-DC Converters

Environmental

Performance/Functional Speciﬁcations

Typical @ TA = +25°C under nominal line voltage, full-load conditions, unless noted. ⁽¹⁾

Input

(13)

Calculated MTBF:

TBD million hours

Input Voltage Range: ⁽²⁾

D24 Models

D48 Models

(4) (14)

Operating Temperature (Ambient):

See derating curves

–40 to +85°C with derating

18-36 Volts (24V nominal)

36-75 Volts (48V nominal)

(4) (7)

PCB Temperature:

Maximum Allowable

Thermal Shutdown

Overvoltage Shutdown

D24 Models

D48 Models

+100°C

+105 to 120°C, +115°C typical

37-41 Volts (39V typical)

None ⁽³⁾

Physical

See Mechanical Dimensions

Start-Up Threshold: ⁽⁴⁾

D24 Models

D48 Models

Dimensions

16-18 Volts (17.5V typical)

34-36 Volts (35V typical)

Pin Material (through-hole)

Gold-plated copper alloy with nickel

underplate

Undervoltage Shutdown: ⁽⁴⁾

D24 Models

D48 Models

Pad Material (SMT)

Weight:

Copper alloy, pure tin over nickel underplate

1 ounce (28 grams)

15.5-17.5 Volts (16.75V typical)

32.5-34.5 Volts (33.5V typical)

Primary-to-Secondary Insulation Level Basic

Input Current:

EMI Conducted and Radiated

FCC Part 15, EN55022 may require

external ﬁlter

Normal Operating Conditions

Inrush Transient

Short Circuit

See Ordering Guide

0.05A²sec maximum

50-100mA

Safety

UL/IEC/EN60950-1 CSA-C22.2 No. 234

Standby Mode:

Off, UV, Thermal Shutdown

4-10mA

Input Reﬂected Ripple Current ⁽⁵⁾

Internal Input Filter Type

8-50mAp-p

(1)

All models are tested and speciﬁed with external output capacitors (1µF ceramic in parallel

with 10µF tantalum), unless otherwise noted. These converters have no minimum-load require-

ments and will effectively regulate under no-load conditions.

Pi

Reverse-Polarity Protection ⁽³⁾

1 minute duration, 5A maximum

(2)

(3)

(4)

(5)

Contact Murata Power Solutions for input voltage ranges other than those listed.

See Absolute Maximum Ratings for allowable input voltages.

(6)

Remote On/Off Control (Pin 2):

Positive Logic ("P" Sufﬁx Models)

On = open, open collector or

3.5-13V applied

See Technical Notes/Performance Curves for additional explanations and details.

Input Ripple Current is tested/speciﬁed over a 5-20MHz bandwidth with an external 33µF input

Off = pulled low to 0-0.8V IIN = 6mA max.

On = pulled low to 0-0.8V I^IN= 6mA max.

Off = open, open collector or

3.5-13V applied

capacitor and a simulated source impedance of 220µF and 12µH. See I/O Filtering, Input

Ripple Current and Output Noise for details.

(6)

Negative Logic ("N" Sufﬁx Models)

The On/Off Control is designed to be driven with open-collector (or equivalent) logic or the

application of appropriate voltages (referenced to –Input (pin 1)). See Remote On/Off Control

for more details.

(7)

Output

All models are fully operational and meet published speciﬁcations, including "cold start," at –40°C.

Minimum Loading

No load

(8)

Extreme Accuracy refers to the accuracy of either trimmed or untrimmed output voltages over

all normal operating ranges and combinations of input voltage, output load and temperature.

VOUT Accuracy (Full Load):

Initial

(9)

See Output Trimming for detailed trim equations.

1.25% maximum

0.02% per °C

3%

(10)

The Current-Limit Inception point is the output current level at which the ULQ’s power-limiting

Temperature Coefﬁcient

Extreme ⁽⁸⁾

circuitry drops the output voltage 2% from its initial value. See Output Current Limiting and

Short-Circuit Protection for more details.

(11)

VOUT Trim Range ⁽⁹⁾

+10%, –20%

See Performance Curves for additional information.

(12)

(4)

For the Start-Up Time speciﬁcations, output settling is deﬁned by the output voltage having

reached 1% of its ﬁnal value.

(13)

Remote Sense Compensation

+10%

Ripple/Noise (20MHz BW)

Line/Load Regulation

Efﬁciency

See Ordering Guide

MTBF’s are calculated using Telcordia (Bellcore) Method 1 Case 3, ground ﬁxed conditions,

+40°C case temperature, and full-load conditions.

Isolation Voltage: Input-to-Output

2000Vdc minimum, D24 models

2250Vdc minimum, D48 models

Absolute Maximum Ratings

Input Voltage:

Continuous:

D24V Models

See OVP

NA

D48V Models

81 Volts

100 Volts

Isolation Resistance

Isolation Capacitance

100MΩ

470pF

Transient (100msec):

Current Limit Inception (98% VOUT) ⁽¹⁰⁾

After warmup

Input Reverse-Polarity Protection

Input Current must be <5A. 1 minute

duration. Fusing recommended.

+125% of maximum rated current

Short Circuit: ⁽⁴⁾

Current

Duration

Output Current

Current limited. Devices can withstand

an indeﬁnite output short circuit.

Hiccup with auto-restart

Continuous

On/Off Control (Pin 2) Max. Voltages

Referenced to –Input (pin 1)

Overvoltage Protection: ⁽⁴⁾

OVP method

VOUT nominal +20%

Comparator magnetic feedback

–0.3 to +13.6 Volts

–55 to +125°C

Storage Temperature

Dynamic Characteristics

Dynamic Load Response ⁽¹¹⁾

(50% Load Step)

Lead Temperature

Through-hole Soldering

SMT Soldering

+300°C, 10 seconds

Refer to solder proﬁle

60-300µsec, model dependent

Start-Up Time: ^{(4) (12)}

V^INto VOUT; On/Off to VOUT

30msec typical, 50msec maximum

160-300kHz, model dependent

4700 to 10,000µF, model dependent

These are stress ratings. Exposure of devices to any of these conditions may adversely

affect long-term reliability. Proper operation under conditions other than those listed in the

Performance/Functional Speciﬁcations Table is not implied, nor recommended.

Switching Frequency

Maximum Capacitive Load

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MDC_ULQ-15A.E04 Page 3 of 17

ULQ Models

Single Output, Low-Proﬁle, Quarter-Brick

8-25 Amp Isolated DC-DC Converters

A built-in hysterisis for all models will not allow the converter to restart until

T E C H N I C A L N O T E S

Input Fusing

the input voltage is sufﬁciently reduced.

Certain applications and/or safety agencies may require the installation of

fuses at the inputs of power conversion components. Fuses should also be

used if the possibility of sustained, non-current-limited, input-voltage polarity

reversals exists. For DATEL ULQ series DC-DC converters, we recommend

the use of a time delay fuse, installed in the ungrounded input supply line,

with a value no greater than 20 Amps.

All 48VIN models have the overvoltage shutdown function disabled, based

on requirements to withstand brief input surges and transients to 100V for

up to 100msec without voltage interruption. Contact DATEL to have input

overvoltage shutdown for 48VIN models enabled.

Input Source Impedance

As a rule of thumb however, we recommend the use of a normal-blow or

slow-blow fuse with a typical value about twice the maximum input current,

calculated at low line with the converter's minimum efﬁciency.

The input of ULQ converters must be driven from a low ac-impedance

source. The DC-DC's performance and stability can be compromised by the

use of highly inductive source impedances. The input circuit shown in Figure

2 is a practical solution that can be used to minimize the effects of induc-

tance in the input traces. For optimum performance, components should be

mounted close to the DC-DC converter.

All relevant national and international safety standards and regulations must

be observed by the installer. For system safety agency approvals, the

converters must be installed in compliance with the requirements of the end-

use safety standard, i.e. IEC/EN/UL60950.

I/O Filtering, Input Ripple Current, and Output Noise

Input Reverse-Polarity Protection

All models in the ULQ Series are tested/speciﬁed for input reﬂected ripple

current and output noise using the speciﬁed external input/output compo-

nents/circuits and layout as shown in the following two ﬁgures. External input

capacitors (CIN in Figure 2) serve primarily as energy-storage elements,

minimizing line voltage variations caused by transient IR drops in conductors

from backplane to the DC-DC. Input caps should be selected for bulk capaci-

tance (at appropriate frequencies), low ESR, and high rms-ripple-current

ratings. The switching nature of DC-DC converters requires that dc voltage

sources have low ac impedance as highly inductive source impedance

can affect system stability. In Figure 2, CBUS and LBUS simulate a typical dc

voltage bus.Your speciﬁc system conﬁguration may necessitate additional

considerations.

If the input voltage polarity is accidentally reversed, an internal diode will

become forward biased and likely draw excessive current from the power

source. If this source is not current limited or the circuit appropiately fused, it

could cause permanent damage to the converter.

Input Undervoltage Shutdown and Start-Up Threshold

Under normal start-up conditions, devices will not begin to regulate properly

until the ramping-up input voltage exceeds the Start-Up Threshold Voltage.

Once operating, devices will not turn off until the input voltage drops below

the Undervoltage Shutdown limit. Subsequent re-start will not occur until the

input is brought back up to the Start-Up Threshold. This built in hysteresis

prevents any unstable on/off situations from occurring at a single input

voltage.

TO

CURRENT

PROBE

OSCILLOSCOPE

1

+VIN

–VIN

Start-Up Time

L

BUS

+

The VIN to VOUT Start-Up Time is the time interval between the point at which

the ramping input voltage crosses the Start-Up Threshold and the fully loaded

output voltage enters and remains within its speciﬁed accuracy band. Actual

measured times will vary with input source impedance, external input capaci-

tance, and the slew rate and ﬁnal value of the input voltage as it appears at

the converter. The ULQ Series implements a soft start circuit to limit the duty

cycle of its PWM controller at power up, thereby limiting the input inrush current.

V

IN

C

BUS

CIN

–

3

C

IN = 33µF, ESR < 700mΩ @ 100kHz

BUS = 220µF, ESR < 100mΩ @ 100kHz

C

L

BUS = 12µH

Figure 2. Measuring Input Ripple Current

The On/Off Control to VOUT start-up time assumes the converter has its

nominal input voltage applied but is turned off via the On/Off Control pin. The

speciﬁcation deﬁnes the interval between the point at which the converter is

turned on (released) and the fully loaded output voltage enters and remains

within its speciﬁed accuracy band.

In critical applications, output ripple/noise (also referred to as periodic and

random deviations or PARD) may be reduced below speciﬁed limits using ﬁl-

tering techniques, the simplest of which is the installation of additional exter-

nal output capacitors. They function as true ﬁlter elements and should be

selected for bulk capacitance, low ESR and appropriate frequency response.

All external capacitors should have appropriate voltage ratings and be

located as close to the converter as possible. Temperature variations for all

relevant parameters should also be taken carefully into consideration. The

most effective combination of external I/O capacitors will be a function of

line voltage and source impedance, as well as particular load and layout

conditions. Our Applications Engineers can recommend potential solutions

and discuss the possibility of our modifying a given device's internal ﬁltering

to meet your speciﬁc requirements. Contact our Applications Engineering

Group for additional details.

Similar to the VIN to VOUT start-up, the On/Off Control to VOUT start-up

time is also governed by the internal soft start circuitry and external load

capacitance. The difference in start up time from VIN to VOUT and from On/Off

Control to VOUT is therefore insigniﬁcant.

Input Overvoltage Shutdown

All 24VIN ULQ DC-DC's are equipped with input overvoltage protection. Input

voltages exceeding the input overvoltage shutdown speciﬁcation listed in the

Performance/Functional Speciﬁcations will cause the device to shutdown.

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MDC_ULQ-15A.E04 Page 4 of 17

ULQ Models

Single Output, Low-Proﬁle, Quarter-Brick

8-25 Amp Isolated DC-DC Converters

tion, the output voltage will decrease proportionately with increases in output

current, thereby maintaining somewhat constant power dissipation. This is

commonly referred to as power limiting. Current limit inception is deﬁned as

the point at which the full-power output voltage falls below the speciﬁed toler-

ance. See Performance/Functional Speciﬁcations. If the load current, being

drawn from the converter, is signiﬁcant enough, the unit will go into a short

circuit condition as described below.

7

8

+SENSE

+VOUT

RLOAD

SCOPE

C1

C2

4

5

Short Circuit Condition

–VOUT

–SENSE

When a converter is in current-limit mode, the output voltage will drop as

the output current demand increases. If the output voltage drops too low, the

magnetically coupled voltage used to develop primary side voltages will also

drop, thereby shutting down the PWM controller. Following a time-out period,

the PWM will restart causing the output voltage to begin ramping to their

appropriate value. If the short-circuit condition persists, another shutdown

cycle will be initiated. This on/off cycling is referred to as "hiccup" mode.

The hiccup cycling reduces the average output current, thereby preventing

internal temperatures from rising to excessive levels. The ULQ Series is

capable of enduring an indeﬁnite short circuit output condition.

C1 = 1µF

C2 = 10µF TANTALUM

LOAD 2-3 INCHES (51-76mm) FROM MODULE

Figure 3. Measuring Output Ripple/Noise (PARD)

Floating Outputs

Since these are isolated DC-DC converters, their outputs are "ﬂoating" with

respect to their input. Designers will normally use the –Output (pin 4) as the

ground/return of the load circuit.You can however, use the +Output (pin 8) as

ground/return to effectively reverse the output polarity.

F E A T U R E S A N D O P T I O N S

Remote Sense

Minimum Output Loading Requirements

Note: The Sense and VOUT lines are internally connected through low-value

resistors. Nevertheless, if the sense function is not used for remote regulation

the user should connect the +Sense to +VOUT and -Sense to –VOUT at the

DC-DC converter pins.

ULQ converters employ a synchronous-rectiﬁer design topology and all

models regulate within spec and are stable under no-load to full load condi-

tions. Operation under no-load conditions however might slightly increase the

output ripple and noise.

ULQ series converters employ a sense feature to provide point of use regula-

tion, thereby overcoming moderate IR drops in pcb conductors or cabling.

The remote sense lines carry very little current and therefore require minimal

cross-sectional-area conductors. The sense lines, which are capacitively

coupled to their respective output lines, are used by the feedback control-loop

to regulate the output. As such, they are not low impedance points and must

be treated with care in layouts and cabling. Sense lines on a pcb should be

run adjacent to dc signals, preferably ground. In cables and discrete wiring

applications, twisted pair or other techniques should be implemented.

Thermal Shutdown

The ULQ converters are equipped with thermal-shutdown circuitry. If envi-

ronmental conditions cause the temperature of the DC-DC converter to rise

above the designed operating temperature, a precision temperature sensor

will power down the unit. When the internal temperature decreases below the

threshold of the temperature sensor, the unit will self start. See Performance/

Functional Speciﬁcations.

Output Overvoltage Protection

ULQ series converters will compensate for drops between the output voltage

at the DC-DC and the sense voltage at the DC-DC provided that:

The ULQ output voltage is monitored for an overvoltage condition using a

comparator. The signal is optically coupled to the primary side and if the

output voltage rises to a level which could be damaging to the load, the sens-

ing circuitry will power down the PWM controller causing the output voltage

to decrease. Following a time-out period the PWM will restart, causing the

output voltage to ramp to its appropriate value. If the fault condition persists,

and the output voltage again climbs to excessive levels, the overvoltage

circuitry will initiate another shutdown cycle. This on/off cycling is referred to

as "hiccup" mode.

[VOUT(+) –VOUT(–)] – [Sense(+) –Sense (–)] ≤ 10% VOUT

Contact and PCB resistance

losses due to IR drops

8

1

+VOUT

+VIN

IOUT

7

+SENSE

Sense Current

2

3

ON/OFF

CONTROL

6

5

TRIM

–SENSE

–VOUT

LOAD

Sense Return

Current Limiting

IOUT Return

As soon as the output current increases to approximately 130% of its rated

value, the DC-DC converter will go into a current-limiting mode. In this condi-

4

–VIN

Contact and PCB resistance

losses due to IR drops

Figure 4. Remote Sense Circuit Conﬁguration

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MDC_ULQ-15A.E04 Page 5 of 17

ULQ Models

Single Output, Low-Proﬁle, Quarter-Brick

8-25 Amp Isolated DC-DC Converters

A single resistor connected from the Trim pin (pin 6) to the +Sense (pin 7) will

increase the output voltage. A resistor connected from the Trim Pin (pin 6) to

the –Sense (pin 5) will decrease the output voltage.

Output overvoltage protection is monitored at the output voltage pin, not the

Sense pin. Therefore, excessive voltage differences between VOUT and Sense

in conjunction with trim adjustment of the output voltage can cause the over-

voltage protection circuitry to activate (see Performance Speciﬁcations for

overvoltage limits). Power derating is based on maximum output current and

voltage at the converter's output pins. Use of trim and sense functions can

cause output voltages to increase, thereby increasing output power beyond

the conveter's speciﬁed rating, or cause output voltages to climb into the

output overvoltage region. Therefore, the designer must ensure:

Trim adjustments greater than the speciﬁed +10%/–20% can have an

adverse affect on the converter’s performance and are not recommended.

Excessive voltage differences between VOUT and Sense, in conjunction with

trim adjustment of the output voltage, can cause the overvoltage protection

circuitry to activate (see Performance Speciﬁcations for overvoltage limits).

Temperature/power derating is based on maximum output current and volt-

age at the converter's output pins. Use of the trim and sense functions can

cause output voltages to increase, thereby increasing output power beyond

the converter's speciﬁed rating, or cause output voltages to climb into the

output overvoltage region. Therefore:

(VOUT at pins) × (IOUT) ≤ rated output power

Trimming Output Voltage

ULQ converters have a trim capability (pin 6) that enables users to adjust

the output voltage from +10% to –20% (refer to the trim equations and trim

graphs that follow). Adjustments to the output voltage can be accomplished

via a trim pot (Figure 5) or a single ﬁxed resistor as shown in Figures 6 and 7.

A single ﬁxed resistor can increase or decrease the output voltage depending

on its connection. Resistors should be located close to the converter and

have TCR's less than 100ppm/°C to minimize sensitivity to changes in

temperature. If the trim function is not used, leave the trim pin open.

(VOUT at pins) x (IOUT) ≤ rated output power

The Trim pin (pin 6) is a relatively high impedance node that can be suscep-

tible to noise pickup when connected to long conductors in noisy environ-

ments. In such cases, a 0.22µF capacitor can be added to reduce this long

lead effect.

Trim Equations

ULQ-1.2/15-D48 & ULQ-1.2/25-D48

1.308(VO – 0.793)

VO – 1.2

1.037

–1.413

–10.2

R^T_UP(kΩ) =

RT_DOWN(kΩ) =

1.2 – V^O

8

1

+VOUT

+VIN

ULQ-1.5/15-D48, ULQ-1.5/25-D24 & D48

7

+SENSE

6.23(VO – 1.226)

7.64

1.5 – V^O

6

–10.2

2

5-22

TURNS

RT_DOWN(kΩ) =

ON/OFF

CONTROL

TRIM

–SENSE

–VOUT

LOAD

VO – 1.5

5

4

ULQ-1.8/15-D48, ULQ-1.8/25-D24 & D48

3

9.12

1.8 – V^O

7.44(VO – 1.226)

–VIN

–10.2

RT_DOWN(kΩ) =

VO – 1.8

Figure 5.Trim Connections Using A Trimpot

ULQ-2/15-D48, ULQ-2/15-D24 & D48

10.15

2 – V^O

8.28(VO – 1.226)

–10.2

8

–10.2

RT_DOWN(kΩ) =

R^T_UP(kΩ) =

1

+VOUT

+VIN

VO – 2

7

ULQ-2.5/15-D48, ULQ-2.5/20-D24 & D48

+SENSE

2

6

10(VO – 1.226)

VO – 2.5

12.26

2.5 – V^O

ON/OFF

CONTROL

TRIM

LOAD

–10.2

RT_DOWN(kΩ) =

R^{TRIM UP}

5

–SENSE

ULQ-3.3/15-D48, ULQ-3.3/20-D24 & D48

3

4

–VIN

–VOUT

16.31

13.3(VO – 1.226)

–10.2

R^T_DOWN(kΩ) =

R^T_UP(kΩ) =

3.3 – V^O

VO – 3.3

Figure 6.Trim Connections To Increase Output Voltages Using Fixed Resistors

ULQ-5/15-D24, -D48

8

25.01

20.4(VO – 1.226)

VO – 5

1

+VOUT

+VIN

–10.2

RT_DOWN(kΩ) =

5 – V^O

7

+SENSE

ULQ-12/8-D24, ULQ-12/10-D48

2

3

6

5

4

ON/OFF

CONTROL

TRIM

–SENSE

–VOUT

LOAD

60.45

49.6(VO – 1.226)

R^{TRIM DOWN}

–10.2

RT_DOWN(kΩ) =

12 – V^O

V^O– 12

–VIN

Note: Resistor values are in kΩ. Adjustment accuracy is subject to resistor

tolerances and factory-adjusted output accuracy. VO = desired output voltage.

Figure 7.Trim Connections To Decrease Output Voltages Using Fixed Resistors

www.murata-ps.com/support

MDC_ULQ-15A.E04 Page 6 of 17

ULQ Models

Single Output, Low-Proﬁle, Quarter-Brick

8-25 Amp Isolated DC-DC Converters

Trim-Up Resistance vs. Percentage Increase in Output Voltage

Model ULQ-2.5

1 x 10⁷

1 x 10⁶

1 x 10⁵

Model ULQ-1.5

1 x 10⁷

1 x 10⁶

1 x 10⁵

1 x10⁴

1 x10³

0

1

2

3

4

5

6

7

8

9

10

0

1

2

3

4

5

6

7

8

9

10

VOUT INCREASE (%)

Model ULQ-3.3

Model ULQ-1.8

1 x 10⁷

1 x 10⁶

1 x 10⁵

1 x10⁴

1 x 10⁶

1 x 10⁵

1 x10⁴

0

1

2

3

4

5

6

7

8

9

10

0

1

2

3

4

5

6

7

8

9

10

VOUT INCREASE (%)

Trim-Down Resistance vs. Percentage Decrease

Model ULQ-2

1 x 10⁷

in Output Voltage

1 x 10⁷

Model ULQ-1.5

Model ULQ-1.8

Model ULQ-2

Model ULQ-2.5

Model ULQ-3.3

1 x 10⁶

1 x 10⁵

1 x10⁴

1 x 10⁶

1 x 10⁵

0

1

2

3

4

5

6

7

8

9

10

1 x10⁴

0

2

4

6

8

10

12

14

16

18

20

VOUT INCREASE (%)

VOUT DECREASE (%)

www.murata-ps.com/support

MDC_ULQ-15A.E04 Page 7 of 17

ULQ Models

Single Output, Low-Proﬁle, Quarter-Brick

8-25 Amp Isolated DC-DC Converters

On/Off Control ("P" or "N" sufﬁx)

The input-side, remote On/Off Control function (pin 2) can be ordered to

operate with either logic type:

+VIN

1

2

+V^CC

"P" sufﬁx: Standard models are equipped with Positive-logic and these

devices are enabled when pin 2 is left open (or is pulled high, applying +3.5V

to +13 with respect to –Input, pin 1) as per Figure 8. Positive-logic devices

are disabled when pin 2 is pulled low (0 to 0.8V with respect to –Input).

ON/OFF

CONTROL

"N" sufﬁx: Optional Negative-logic devices are off when pin 2 is left open (or

pulled high, applying +3.5V to +13V), and on when pin 2 is pulled low (0 to

0.8V) with respect to –Input as shown in Figure 9.

–VIN

3

Figure 9. Driving the Negative Logic On/Off Control Pin

+VIN

1

2

Dynamic control of the remote on/off function is best accomplished with

a mechanical relay or an open-collector/open-drain drive circuit (optically iso-

lated if appropriate). The drive circuit should be able to sink appropriate cur-

rent (see Performance Speciﬁcations) when activated and withstand appro-

priate voltage when deactivated. Applying an external voltage to pin 2 when

no input power is applied to the converter can cause permanent damage

to the converter.

13V CIRCUIT

5V CIRCUIT

ON/OFF

CONTROL

–VIN

3

Figure 8. Driving the Positive Logic On/Off Control Pin

Surface-Mount Package ("M" sufﬁx)

DATEL is not exempted from the Laws of Physics. And we do not have magic

solders no one else has. Nevertheless, we have a simple and practical,

straightforward approach that works. We assemble our SMT DC-DC's on

a hightemperature, plastic lead-frame (nylon 46, UL94V-0 rated) using a

high-temperature (+216°C), lead-free alloy (Sn96.2%, Ag2.5%, Cu0.8%,

Sb0.5%). The lead-frame ensures coplanarity (to within 0.004 in.) of the unit's

tin-plated (150 microinches) copper leads and also supports a removable

heat shield.

DATEL's ULQ series SMT DC-DC converters are the only higher-power (to

66W) DC-DC's that can be automatically "pick-and-placed" using standard

vacuum-pickup equipment and subsequently reﬂowed using high-tempera-

ture, lead-free solder.

Virtually all SMT DC-DC's today are unprotected "open-frame" devices

assembled by their vendors with high-temperature solder (usually Sn96.5/

Ag3.5 with a melting point +221°C) so that you may attach them to your

board using low-temperature solder (usually Sn63/Pb37 with a melting point

of +183°C). Conceptually straightforward, this "stepped" solder approach has

its limitations . . . and is clearly out of step with an industry trending toward

the broad use of lead-free solders. No need to experiment and develop reﬂow

proﬁles that ensure the components on their DC-DC never exceed 215-

216°C. If those components get too hot, "double-reﬂow" could compromise

the reliability of their solder joints. Virtually all these devices demand you

"cool down" the Sn63 proﬁle you are likely using today.

The disposable heat shield, which has a cutaway exposing the package

leads, provides thermal insulation to internal components during reﬂow and

also doubles as the vacuum pick-up location. The insulation properties of the

heat shield are so effective that temperature differentials as high as 50°C

develop inside-to-outside the shield. Oven temperature proﬁles with peaks of

250-260°C and dwell times exceeding 2 minutes above 221°C (the melting

point of Sn96.5/Ag3.5) are easily achieved. DATEL's new-generation SMT

units are shipped in stackable, JEDEC-style plastic.

250

200

150

100

50

Heat Shield

Test Board

Air Under Shield

Z1

Z2

Z3

Z4

Z5

Z6

300

Z7

Seconds

100

200

400

500

600

Figure 11. Recommended Solder Proﬁle

(When The Heat-shield Temperature Exceeds +250°C,The Air Within Is 50°C Cooler)

Figure 10. ULQ SMT DC-DC

With Disposable Heat Shield

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MDC_ULQ-15A.E04 Page 8 of 17

ULQ Models

Single Output, Low-Proﬁle, Quarter-Brick

8-25 Amp Isolated DC-DC Converters

Typical Performance Curves, 1.5V Models

ULQ-1.5/25-D24 Efficiency vs. Line Voltage and Load Current

ULQ-1.5/25-D24

Output Current vs. Ambient Temperature

(No air flow)

92

90

88

86

84

82

80

78

76

74

72

70

30

25

20

15

10

5

V

IN = 18V

VIN = 18V

VIN = 24V

V

IN = 24V

VIN = 36V

V

IN = 36V

0

–40

0

25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100

2.5

5

7.5

10

12.5

15

17.5

20

22.5

25

Ambient Temperature (°C)

Load Current (Amps)

ULQ-1.5/15-D48 Efficiency vs. Line Voltage and Load Current

ULQ-1.5/15-D48

Output Current vs. Ambient Temperature

(No air flow)

92

90

88

86

84

82

80

78

76

74

72

70

68

66

18

15

12

9

VIN = 36V

V

IN = 36V

VIN = 48V

V

IN = 48V

6

VIN = 75V

3

V

IN = 75V

0

–40

0

25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100

Ambient Temperature (°C)

1.5

3

4.5

6

7.5

9

10.5

12

13.5

15

Load Current (Amps)

ULQ-1.5/25-D48 Efficiency vs. Line Voltage and Load Current

ULQ-1.5/25-D48

Output Current vs. Ambient Temperature

(VIN = 48V, air flow direction from Input pin to Output pin)

91

89

87

85

83

81

79

77

75

73

30

25

20

15

10

5

0 lfm

V

IN = 36V

100 lfm

V

IN = 48V

200 lfm

V

IN = 75V

0

–40

0

25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100

2.5

5

7.5

10

12.5

15

17.5

20

22.5

25

Load Current (Amps)

Ambient Temperature (°C)

www.murata-ps.com/support

MDC_ULQ-15A.E04 Page 9 of 17

ULQ Models

Single Output, Low-Proﬁle, Quarter-Brick

8-25 Amp Isolated DC-DC Converters

Typical Performance Curves, 1.8V Models

ULQ-1.8/15-D48 Efficiency vs. Line Voltage and Load Current

ULQ-1.8/15-D48

Output Current vs. Ambient Temperature

(No air flow)

92

90

88

86

84

82

80

78

76

74

72

70

68

18

15

12

9

VIN = 36V

VIN = 48V

V

IN = 36V

6

V

IN = 48V

VIN = 75V

3

V

IN = 75V

0

–40

0

25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100

Ambient Temperature (°C)

1.5

3

4.5

6

7.5

9

10.5

12

13.5

15

Load Current (Amps)

ULQ-1.8/25-D24 Efficiency vs. Line Voltage and Load Current

ULQ-1.8/25-D24

92

90

88

86

84

82

80

78

76

74

72

70

68

Output Current vs. Ambient Temperature

(No air flow)

30

25

20

15

10

5

V

IN = 18V

VIN = 18V

VIN = 24V

V

IN = 24V

V

IN = 36V

VIN = 36V

0

–40

0

25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100

2.5

5

7.5

10

12.5

15

17.5

20

22.5

25

Ambient Temperature (°C)

Load Current (Amps)

ULQ-1.8/25-D48 Efficiency vs. Line Voltage and Load Current

ULQ-1.8/25-D48

92

90

88

86

84

82

80

78

76

74

72

70

68

Output Current vs. Ambient Temperature

(VIN = 48V, air flow direction from Input pin to Output pin)

30

25

20

15

10

5

0 lfm

V

IN = 36V

100 lfm

200 lfm

V

IN = 48V

V

IN = 75V

0

–40

0

25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100

2.1

4.2 6.25 8.3 10.4 12.5 14.6 16.7 18.75 20.8 22.9 25

Load Current (Amps)

Ambient Temperature (°C)

www.murata-ps.com/support

MDC_ULQ-15A.E04 Page 10 of 17

ULQ Models

Single Output, Low-Proﬁle, Quarter-Brick

8-25 Amp Isolated DC-DC Converters

Typical Performance Curves, 2V Models

ULQ-2/15-D48 Efficiency vs. Line Voltage and Load Current

ULQ-2/15-D48

Output Current vs. Ambient Temperature

(No air flow)

92

90

88

86

84

82

80

78

76

74

72

70

68

18

15

12

9

VIN = 36V

V

IN = 36V

VIN = 48V

6

V

IN = 48V

VIN = 75V

3

V

IN = 75V

0

–40

0

25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100

Ambient Temperature (°C)

1.5

3

4.5

6

7.5

9

10.5

12

13.5

15

Load Current (Amps)

ULQ-2/25-D24 Efficiency vs. Line Voltage and Load Current

ULQ-2/25-D24

Output Current vs. Ambient Temperature

(No air flow)

92

90

88

86

84

82

80

78

76

74

72

70

30

25

20

15

10

5

V

IN = 18V

VIN = 18V

VIN = 24V

V

IN = 24V

VIN = 36V

V

IN = 36V

0

–40

0

25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100

2.5

5

7.5

10

12.5

15

17.5

20

22.5

25

Ambient Temperature (°C)

Load Current (Amps)

ULQ-2/25-D48 Efficiency vs. Line Voltage and Load Current

ULQ-2/25-D48

92

90

88

86

84

82

80

78

76

74

72

70

Output Current vs. Ambient Temperature

(V^IN= 48V, air flow direction from Input pin to Output pin)

30

25

20

15

10

5

0 lfm

V

IN = 36V

100 lfm

200 lfm

V

IN = 48V

V

IN = 75V

0

–40

0

22 26 30 34 38 42 46 50 54 58 62 66 70 74 78 82 86 90

2.5

5

7.5

10

12.5

15

17.5

20

22.5

25

Ambient Temperature (°C)

Load Current (Amps)

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MDC_ULQ-15A.E04 Page 11 of 17

ULQ Models

Single Output, Low-Proﬁle, Quarter-Brick

8-25 Amp Isolated DC-DC Converters

Typical Performance Curves, 2.5V Models

ULQ-2.5/15-D48 Efficiency vs. Line Voltage and Load Current

ULQ-2.5/15-D48

Output Current vs. Ambient Temperature

(VIN = 48V, air flow direction from Input pin to Output pin)

94

92

90

88

86

84

82

80

78

76

74

72

18

15

12

9

Natural Convection

100 lfm

V

IN = 36V

200 lfm

300 lfm

400 lfm

6

V

IN = 48V

3

V

IN = 75V

0

–40

0

25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100

1.5

3

4.5

6

7.5

9

10.5

12

13.5

15

Ambient Temperature (°C)

Load Current (Amps)

ULQ-2.5/20-D48 Efficiency vs. Line Voltage and Load Current

ULQ-2.5/20-D48

93

91

89

87

85

83

81

79

77

Output Current vs. Ambient Temperature

(VIN = 48V, air flow direction from Input pin to Output pin)

25

20

15

10

5

V

IN = 36V

100 lfm

200 lfm

300 lfm

V

IN = 48V

V

IN = 75V

400 lfm

0

–40

0

25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100

2

4

6

8

10

12

14

16

18

20

Load Current (Amps)

Ambient Temperature (°C)

ULQ-2.5/20-D24 Power Dissipation vs. Load Current

11

10

9

8

7

6

5

4

3

2

1

VIN = 36V

V

IN = 24V

V

IN = 18V

2

4

6

8

10

12

14

16

18

20

22

Load Current (Amps)

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MDC_ULQ-15A.E04 Page 12 of 17

ULQ Models

Single Output, Low-Proﬁle, Quarter-Brick

8-25 Amp Isolated DC-DC Converters

Typical Performance Curves, 3.3V Models

ULQ-3.3/15-D48

ULQ-3.3/15-D48 Efficiency vs. Line Voltage and Load Current

Output Current vs. Ambient Temperature

(VIN = 48V, air flow direction from Input pin to Output pin)

94

90

86

82

78

74

70

18

15

12

9

Natural Convection

100 lfm

V

IN = 36V

200 lfm

300 lfm

400 lfm

6

V

IN = 48V

3

V

IN = 75V

0

–40

0

25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100

Ambient Temperature (°C)

1

2

3

4

5

6

7

8

9

10 11 12 13 14 15

Load Current (Amps)

ULQ-3.3/20-D24 Efficiency vs. Line Voltage and Load Current

ULQ-3.3/20-D24

Output Current vs. Ambient Temperature

(VIN = 24V, air flow direction from Input pin to Output pin)

93

91

89

87

85

83

81

79

77

25

20

15

10

5

V

IN = 18V

V

IN = 24V

0 lfm

100 lfm

V

IN = 36V

200 lfm

400 lfm

0

–40

0

25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100

2

4

6

8

10

12

14

16

18

20

Ambient Temperature (°C)

Load Current (Amps)

ULQ-3.3/20-D48 Efficiency vs. Line Voltage and Load Current

ULQ-3.3/20-D48

Output Current vs. Ambient Temperature

(VIN = 48V, air flow direction from Input pin to Output pin)

93

91

89

87

85

83

81

79

77

25

20

15

10

5

V

IN = 36V

100 lfm

V

IN = 48V

200 lfm

300 lfm

V

IN = 75V

0

–40

0

25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100

2

4

6

8

10

12

14

16

18

20

Ambient Temperature (°C)

Load Current (Amps)

www.murata-ps.com/support

MDC_ULQ-15A.E04 Page 13 of 17

ULQ Models

Single Output, Low-Proﬁle, Quarter-Brick

8-25 Amp Isolated DC-DC Converters

Typical Performance Curves, 5V Models

ULQ-5/15-D48N Efficiency Vs. Line Voltage And Load Current

ULQ-5/15-D48N

Maximum Output Current vs. Ambient Temperature

(VIN = 48V, air flow direction from Input pin to Output pin)

90.0

80.0

70.0

60.0

50.0

40.0

16

15

14

13

12

11

10

9

Vin = 36V

Vin = 48V

100 lfm

Vin = 60V

Vin = 75V

200 lfm

300 lfm

400 lfm

–40

0

25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100

1.5

3

4.5

6

7.5

9

10.5

12

13.5

15

Ambient Temperature (°C)

Load Current (Amps)

www.murata-ps.com/support

MDC_ULQ-15A.E04 Page 14 of 17

ULQ Models

Single Output, Low-Proﬁle, Quarter-Brick

8-25 Amp Isolated DC-DC Converters

Typical Performance Curves, 12V Models

ULQ-12/8-D24N

Efficiency vs. Line Voltage and Load Current @25°C

ULQ-12/8-D24

Maximum Output Current vs. Ambient Temperature

(VIN = 24V, transverse air flow direction from –Output to +Output pin)

95

90

85

80

75

70

9

8

7

6

5

4

3

2

1

0

0 lfm

200 lfm

V

IN = 18V

400 lfm

600 lfm

V

IN = 24V

V

IN = 36V

–40

0

25

30

35

40

45

50

55

60

65

70

75

80

85

90

Ambient Temperature (°C)

0.8

1.6

2.4

3.2

4

4.8

5.6

6.4

7.2

8

Load Current (Amps)

ULQ-12/10-D48N

Efficiency vs. Line Voltage and Load Current @25°C

ULQ-12/10-D48

Output Current vs. Ambient Temperature

95

90

85

80

75

70

(V^IN= 48V, air flow direction from Input pin to Output pin)

10.5

10

9.5

9

500 lfm

8.5

8

100 lfm

200 lfm

V

IN = 36V

V

IN = 48V

7.5

7

300 lfm

V

IN = 75V

6.5

6

–40

0

22 26 30 34 38 42 46 50 54 58 62 66 70 74 78 82 86 90

1

2

3

4

5

6

7

8

9

10

Ambient Temperature (°C)

Load Current (Amps)

ULQ-12/10-D48 Power Dissipation vs. Load Current

19

17

15

13

11

9

VIN = 75V

V

IN = 48V

V

IN = 36V

7

5

3

1

2

3

4

5

6

7

8

9

10

Load Current (Amps)

www.murata-ps.com/support

MDC_ULQ-15A.E04 Page 15 of 17

ULQ Models

Single Output, Low-Proﬁle, Quarter-Brick

8-25 Amp Isolated DC-DC Converters

SMT

Lead

For the surface mount versions of the ULQ, use the Recommended SMT Pad

Layout illustration as a starting point to locate pads to mount the converter.

This diagram is for the pads on the mating printed circuit board—it is not

the dimensions of the lead terminals on the converter. Note: the pads are

slightly larger than the lead terminals to accomodate solder wetting and

meniscus. Also, your particular application may require some deviation from

this diagram.

SMT Unit

PCB

0.020

(0.51)

Copper Pad

2.340 (59.44)

1.975 (50.17)

0.183

(4.65)

0.130

(3.30)

*

0.150 TYP.

(3.81)

0.020 REF.

(0.51)

* These two pads are for alignment and positioning only.

They are not required for electrical contact.

Recommended SMT Pad Layout

P A R T N U M B E R S T R U C T U R E

U LQ - 3.3 / 20 D48 N M Lx

- C

RoHS-6 Hazardous

Substance Compliant

-

Output

Conﬁguration:

U = Unipolar

Pin Length Option: Through-hole packages only

Quarter-Brick Package

L1 Pin length 0.110 0.010 inches (2.7ꢀ 0.25mm) ➀

Nominal Output Voltage:

1.2,1.5, 1.8, 2, 2.5, 3.3, 5, 12 Volts

L2 Pin length 0.145 0.010 inches (3.68 0.25mm) ➀

Blank is standard pin length

Maximum Rated Output :

Current in Amps

Surface-Mount Package ➁ ➂

Remote On/Off Control Logic

Add "P" for positive logic

(pin 2 open = converter on)

Input Voltage Range:

D24 = 18-36 Volts (24V nominal)

D48 = 36-75 Volts (48V nominal)

Add "N" for negative logic

(pin 2 open = converter off)

Positive logic is standard for D24 models. Nega-

tive logic is standard for D48 models. Alternate

logic may require a special order.

➀ Special quantity order is required; samples available with standard pin length only.

➁ SMT (M) versions not available in sample quantities.

➂ See list on pg. 2 using the C40 SMT package.

➃ Some model number combinations may not be available. See website or contact your local Murata sales representative.

www.murata-ps.com/support

MDC_ULQ-15A.E04 Page 16 of 17

ULQ Models

Single Output, Low-Proﬁle, Quarter-Brick

8-25 Amp Isolated DC-DC Converters

M E C H A N I C A L S P E C I F I C A T I O N S

2.30 (58.4)

A

0.375 MAX.

(9.53)

OVERALL DIMENSIONS :

2.22 (56.4)

A

2.30 (58.4) x 1.45 (36.8) x 0.70 (17.8)

BEFORE REMOVAL OF PROTECTIVE

HEAT SHIELD

PINS 1-3, 5-7:

0.040 0.001

(1.016 0.025)

PINS 4, 8:

0.062 0.001

(1.575 0.025)

0.35

(8.9)

PROTECTIVE

HEAT SHIELD

0.125

(3.2)

PLASTIC STANDOFFS

ARE RELIEVED 0.030 (0.76)

IN SOLDER JOINT AREA

0.125 MIN.

(3.2)

Case C40

0.150

(3.81)

2.00 (50.8)

A

₃Surface-mount Package

4

5

6

See page 16 for the

recommneded pad

layout dimensions.

2

7

8

1

4

3

2

1

0.600

(15.2)

0.110

(2.79)

5

6

0.300

(7.6)

7

8

BOTTOM VIEW

0.600 (15.2)

4 EQ. SP. @ 0.150 (3.81)

0.600

(15.2)

0.300

(7.6)

BOTTOM VIEW

0.600 (15.2)

4 EQ. SP.

Case C37, Through-Hole Package @ 0.150 (3.81)

DOSA-Compatible I/O Connections

Dimensions are in inches (mm) shown for ref. only.

1

Function P32

+Vin

5

Function P32

–Sense

Trim

ꢀꢁꢂꢃd ꢄꢅꢆle ꢇꢃoꢈeꢉꢊꢂoꢅ

2

Remote On/Off*

–Vin

6

3

7

+Sense

+Vout

4

–Vout

8

Tolerances (unless otherwise speciﬁed):

.XX ꢀ.ꢀ0 (ꢀ.ꢁ)

.XXX ꢀ.ꢀꢂꢀ (ꢀ.0ꢁ)

Angles 02

*

The Remote On/Off can be provided with either positive ("P" sufﬁx)

or negative ("N" sufﬁx) logic.

Components are shown for reference only.

This product is subject to the following operating requirements

and the Life and Safety Critical Application Sales Policy:

Refer to: http://www.murata-ps.com/requirements/

Murata Power Solutions, Inc.

11 Cabot Boulevard, Mansﬁeld, MA 02048-1151 U.S.A.

ISO 9001 and 14001 REGISTERED

Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other

technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply

the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Speciﬁcations are subject to change without

notice.

www.murata-ps.com/support

MDC_ULQ-15A.E04 Page 17 of 17


型号：	ULQ-3.3/20-D24N-C
厂家：	muRata
描述：	DC-DC Regulated Power Supply Module,
文件：	总17页 (文件大小：851K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

ULQ-3.3/20-D24N-C [MURATA]

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