UWR-3.3/4250-D48A-31085 - Murata Power Solutions

Figure 1. Simpliﬁ ed Schematic

COMMON

(6)

(1)

–V

(2)

PWM

CONTROLLER

OPTO

ISOLATION

REFERENCE &

ERROR AMP

COMPARATORS

UVLO & OVLO

ON/OFF

CONTROL

(3)

(OPTIONAL)

TRIM

(5)

(OPTIONAL)

OUT

(4)

SWITCH

CONTROL

Typical topology is shown.

Typical units

FEATURES



1.2-2.5VOUT models source 6 Amps



3.3VOUT models source 4.25 Amps



5/12/15VOUT models deliver full 15 Watts



Synchronous-rectiﬁ er topologies



Guaranteed efﬁ ciencies to 88%



Choice of 3 input voltage ranges:

10-18V, 18-36V, 36-75V



–40 to +60/70C ambient w/o derating

 Fully isolated (1500Vdc); I/O protected



Meets UL/IE/EN60950-1 certiﬁ cation,

2nd Edition



CE mark (75VIN models)



Standard 1" x 2" packages and pinouts



Optional VOUT trim and on/off control

The new 1.2, 1.5V, 1.8V and 2.5V models in

Murata Power Solutions’ ﬂ agship 7-15 Watt

A-Series can source a continuous 6 Amps. This

is the most "low-voltage" current available from

a standard 1" x 2" package, and these power

converters exemplify Murata Power Solutions’

relentless drive to bring you more power/current,

from standard packages, without compromising

reliability or resorting to thermal specmanship.

By combining a high-frequency, high-efﬁ ciency

(to 88%), synchronous-rectiﬁ er topology with

the newest components and time-tested, fully

automated, SMT-on-pcb construction, these

UWR Models are able to bring you 7-15W (@

up to 6A) in the standard 1" x 2" package from

which most competitors can only get 5-10W (@

3-4A). All UWR’s deliver their full output power

over ambient temperature ranges from –40°C

to as high as +70°C (model and input voltage

dependent) without heat sinks or supplemental

forced-air cooling. Devices derate to +100°C.

Output voltages are 1.2, 1.5, 1.8, 2.5, 3.3, 5,

12 or 15 Volts. Input voltage ranges are 10-18V

(D12 models), 18-36V (D24 models) or 36-75V

(D48 models). All models feature input pi ﬁ lters,

input undervoltage and overvoltage lockout, input

reverse-polarity protection, output overvoltage

protection, output current limiting, and continuous

short-circuit protection. On/off control and output-

trim functions are optional (see Optional Functions).

All models are designed to meet IEC950, UL1950

and EN60950-1, 2nd Edition safety requirements.

D48models (36-75V inputs) are CE marked.

UWR 7-15W DC/DC’s are packaged in low-

cost, light-weight, diallyl phthalate (UL94V-0

rated) plastic packages with standoffs. EMC

compliance is achieved via a low-noise design

rather than through expensive metal shielding.

PRODUCT OVERVIEW

A-

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UWR Models

Single Output,

High-Density,

6 Amp/15 Watt

DC/DC Converters

MDC_UWR_7-15.G03 Page 1 of 12

Performance Speciﬁ cations and Ordering Guide ➀

➀ Typical at TA = +25°C under nominal line voltage and full-load conditions, unless otherwise noted.

➁ Ripple/Noise (R/N) is tested/speciifed over a 20MHz bandwidth. All models are speciﬁ ed with

two external 0.47µF multi-layer ceramic capacitors located 2-3 inches from the module being

tested.

➂ Load regulation is speciﬁ ed over 10%-100% load conditions. 1.5-5V models are stable and

regulate under no-load conditions. 12/15V models have minimum loading requirements See

Performance/Functional Speciﬁ cations.

➃ Nominal line voltage, no-load/full-load conditions.

➄ See

page 12.

➅ Special trim version. See Trim Equations, page 5. Quantity order required.

➆ Please refer to the

Part Number Structure for additional options when ordering.

*Pins 3 and 5 are optional.

See Optional Functions and

Technical Notes for details.

Standard pin length is shown.

Please refer to the Part Number

Structure for special order pin

lengths.

Pin Function P22 Pin Function P22

1 +Input 4 +Output

2 –Input 5 Trim*

3 On/Off Control* 6 Common

I/O Connections

For Part Number Structure, please see page 12.

MECHANICAL SPECIFICATIONS

Third Angle Projection

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

Components are shown for reference only.

Tolerances (unless otherwise speciﬁed):

.XX ± 0.02 (0.5)

.XXX ± 0.010 (0.25)

Angles ± 2˚

.475

12.07

.020 STANDOFF

(4 PLACES)

1.00

25.4

END VIEWSIDE VIEW

PLASTIC CASE

.20

MIN

2.00

50.8

5.1

6X .040±.002

1.02±0.05

BOTTOM VIEW

20.32

7.62

10.1612.70 .800

.800

2.5

.500

20.32

.400

.10

.300

.60

15.2

ORDERING GUIDE

Root Model ➆

Output Input Efﬁ ciency Package

(Case, Pinout)

Vout

(Volts)

Iout

(mA)

R/N (mV p-p) ➁Regulation (max.) Vin nom.

(Volts)

Range

(Volts)

Iin

(mA) ➃

Typ. Max. Line Load ➂Min. Typ.

UWR-1.2/6000-D12A-C 1.2 6000 40 75 ±0.2% ±0.5% 12 10-18 80/769 76% 78% C14, P22

UWR-1.2/6000-D24A-C 1.2 6000 40 75 ±0.05% ±0.75% 24 18-36 45/375 78% 80% C14, P22

UWR-1.2/6000-D48A-C 1.2 6000 40 75 ±0.2% ±0.5% 48 36-75 80/188 78% 80% C14, P22

UWR-1.5/6000-D12A-C 1.5 6000 30 55 ±0.1% ±0.5% 12 10-18 75/914 77.5% 79.5% C14, P22

UWR-1.5/6000-D24A-C 1.5 6000 30 55 ±0.1% ±0.5% 24 18-36 40/454 78% 80% C14, P22

UWR-1.5/6000-D48A-C 1.5 6000 30 55 ±0.1% ±0.5% 48 36-75 25/226 78.5% 80.5% C14, P22

UWR-1.8/6000-D12A-C 1.8 6000 30 55 ±0.1% ±0.5% 12 10-18 70/1084 81% 83% C14, P22

UWR-1.8/6000-D24A-C 1.8 6000 30 55 ±0.1% ±0.5% 24 18-36 35/539 82.5% 84.5% C14, P22

UWR-1.8/6000-D48A-C 1.8 6000 30 55 ±0.1% ±0.5% 48 36-75 25/268 83% 85% C14, P22

UWR-2.5/6000-D12A-C 2.5 6000 30 55 ±0.1% ±0.5% 12 10-18 80/1489 83% 86% C14, P22

UWR-2.5/6000-D24A-C 2.5 6000 30 50 ±0.075% ±0.25% 24 18-36 45/727 84.75% 86% C14, P22

UWR-2.5/6000-D48A-C 2.5 6000 30 55 ±0.1% ±0.5% 48 36-75 25/367 84% 86% C14, P22

UWR-3.3/4250-D12A-C 3.3 4250 85 100 ±0.2% ±0.5% 12 10-18 80/1375 83% 86% C14, P22

UWR-3.3/4250-D24A-C 3.3 4250 45 70 ±0.2% ±0.5% 24 18-36 45/672 85% 87% C14, P22

UWR-3.3/4250-D48A-C 3.3 4250 85 100 ±0.2% ±0.5% 48 36-75 35/336 85% 87% C14, P22

UWR-3.3/4500-D48ANT-C ➄3.3 4500 85 100 ±0.2% ±0.5% 48 36-75 35/356 85% 87% C14, P22

UWR-5/3000-D12A-C 5 3000 85 100 ±0.2% ±0.3% 12 10-18 110/1471 83% 85% C14, P22

UWR-5/3000-D24A-C 5 3000 85 100 ±0.2% ±0.3% 24 18-36 55/710 85.5% 88% C14, P22

UWR-5/3000-D48A-C 5 3000 85 100 ±0.2% ±0.3% 48 36-75 35/355 85.5% 88% C14, P22

UWR-5/3000-D48ANST-C ➅5 3000 85 100 ±0.2% ±0.3% 48 36-75 35/355 85.5% 88% C14, P22

UWR-12/1250-D12A-C 12 1250 85 100 ±0.2% ±0.3% 12 10-18 45/1471 82.5% 85% C14, P22

UWR-12/1250-D24A-C 12 1250 85 100 ±0.2% ±0.3% 24 18-36 45/718 85% 87% C14, P22

UWR-12/1250-D48A-C 12 1250 85 100 ±0.2% ±0.3% 48 36-75 20/359 85% 87% C14, P22

UWR-15/1000-D12A-C 15 1000 85 100 ±0.2% ±0.3% 12 10-18 45/1471 82.5% 85% C14, P22

UWR-15/1000-D24A-C 15 1000 85 100 ±0.2% ±0.3% 24 18-36 45/718 85% 87% C14, P22

UWR-15/1000-D48A-C 15 1000 85 100 ±0.2% ±0.3% 48 36-75 20/359 85% 87% C14, P22

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UWR Models

Single Output,

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6 Amp/15 Watt

DC/DC Converters

MDC_UWR_7-15.G03 Page 2 of 12

TARGETED FOR OBSOLESCENCE

Dynamic Characteristics (continued)

Switching Frequency

1.2V models 250-300kHz ±30kHz, model dependent

1.5V D48 models 260kHz (±30kHz)

1.8V D12 models 280kHz (±30kHz)

1.8V D24 models 250kHz (±30kHz)

1.8V D48 models 210kHz (±20kHz)

2.5 and 1.5 D12/D24 models 340kHz (±40kHz)

3.3-12V models 310-345kHz ±10%, model dependent

Environmental

Operating Temperature (Ambient): –40 to +85°C with Derating

(See Derating Curves)

Case Temperature:

Maximum Allowable +100°C

Storage Temperature –40 to +105°C

Physical

Dimensions 2" x 1" x 0.475" (51 x 25 x 12.1mm)

Shielding None

Case Material Diallyl phthalate, UL94V-0 rated

Pin Material Gold-plated copper alloy with nickel underplate

Weight 1.4 ounces (39.7 grams)

➀ All models are speciﬁ ed with two external 0.47µF multi-layer ceramic capacitors installed across

their output pins.

➁ See Minimum Output Loading Requirements under Technical Notes.

➂ See Technical Notes for details.

➃ The On/Off Control and Trim functions are optional and must be installed by MPS. See Optional

Functions or contact MPS for details.

➄ The On/Off Control is designed to be driven with open-collector logic or the application of appro-

priate voltages (referenced to –Input, pin 2). Applying a voltage to the On/Off Control pin when

no input voltage is applied to the converter may cause permanent damage. See Technical Notes.

➅ Output noise maybe further reduced with the addition of additional external output capacitors.

See Technical Notes.

➆ Operating temperature range without derating is model and input-voltage dependent. See

Temperature Derating.

➇ RoHS-6 hazardous substance compliance does not claim EU RoHS exemption 7b (lead in solder).

Performance/Functional Speciﬁ cations

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

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

adversely affect long-term reliability. Proper operation under conditions other than those

listed in the Performance/Functional Speciﬁ cations Table is not implied.

Input Voltage:

Continuous:

D12 Models 22 Volts

D24 Models 44 Volts

D48 Models 88 Volts

Transient (100msec):

D12 Models 50 Volts

D24 Models 50 Volts

D48 Models 100 Volts

Input Reverse-Polarity Protection Current must be <10 Amps. Brief duration

only. Fusing recommended.

Output Overvoltage Protection:

1.2V/1.5/1.8V Outputs 2.1/2.2/2.3 Volts, unlimited duration

2.5V/3.3V Outputs TBD/3.4/4.4 Volts, unlimited duration

5V/12V/15V Outputs 7.1/16/18 Volts, unlimited duration

Output Current Current limited. Devices can withstand sus-

tained output short circuits without damage.

Case Temperature +100°C

Storage Temperature –40 to +105°C

Lead Temperature See soldering guidelines

Absolute Maximum Ratings

Input

Input Voltage Range:

D12A Models 10-18 Volts (12V nominal)

D24A Models 18-36 Volts (24V nominal)

D48A Models 36-75 Volts (48V nominal)

Overvoltage Shutdown:

D12A Models 18.5-21 Volts (20V typical)

D24A Models 37-41 Volts (38V typical)

D48A Models 77-81 Volts (78.5V typical)

Start-Up Threshold: ➂

D12A Models 9.4-10 Volts (9.6V typical)

D24A Models 16.5-18 Volts (17V typical)

D48A Models 34-36 Volts (35V typical)

Undervoltage Shutdown: ➂

D12A Models 7-8.5 Volts (8V typical)

D24A Models 15.5-17.5 Volts (16.5V typical)

D48A Models 32.5-35.5 Volts (34V typical)

Input Current:

Normal Operating Conditions See Ordering Guide

Standby Mode (Off, OV, UV) 5mA

Input Filter Type Pi

Reverse-Polarity Protection Brief duration, 10A maximum

On/Off Control (Optional, Pin 3): ➃ ➄

D12AC, D24AC, & D48AC Models On = open or 13V to +VIN, IIN = 1-5mA typ.

Off = 0-0.8V, IIN = 3-12mA typ.

D12AN, D24AN, & D48AN Models On = 0-0.8V, IIN = 3-12mA typ.

Off = open or 3.3-5.5V, IIN = 1-5mA typ.

Output

VOUT Accuracy (50% load): ±1.5% (±2% for model UWR-1.2/6000)

Minimum Loading for Speciﬁ cation: ➁

1.2V/1.5V/1.8V/2.5V/3.3V/5V Outputs No load

12V/15V Outputs 10% of IOUT max.

Minimum Loading for Stability: ➁

1.2V/1.5V/1.8V/2.5V/3.3V/5V Outputs No load

12V/15V Outputs 25mA

Ripple/Noise (20MHz BW) ➀ ➅ See Ordering Guide

Line/Load Regulation See Ordering Guide

Efﬁ ciency See Ordering Guide

Isolation Voltage:

Input-to-Output 1500Vdc minimum (functional)

Isolation Capacitance 470pF

Isolation Resistance 100M

Current Limiting:

1.2V-5V Outputs Hiccup technique, auto-recovery

12V and 15V Outputs Power-limiting technique, auto-recovery

Overvoltage Protection Zener/transorb clamp, magnetic feedback

Temperature Coefﬁ cient ±0.04% per °C

Dynamic Characteristics

Transient Response (50% load step)

1.2V-2.5V models 200µsec max. to ±2% of ﬁ nal value

3.3V-15V models 200µsec max. to ±1.5% of ﬁ nal value

Start-Up Time: ➂

IN to VOUT 50msec

On/Off to VOUT 30msec

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UWR Models

Single Output,

High-Density,

6 Amp/15 Watt

DC/DC Converters

MDC_UWR_7-15.G03 Page 3 of 12

red camera is a another alternative which avoids the TC heatsinking effect.

But the IR camera must be calibrated frequently and accurately. Remember

too that it is quite difﬁ cult to accurately measure airﬂ ow right at the converter.

Murata Power Solutions uses a calibrated wind tunnel with large amounts

of data history. Because of thermal time constants, allow plenty of time for

temperature stabilization.

Trimming Output Voltages

These converters have a trim capability (pin 5) that allows users to adjust the

output voltage ±5%. Adjustments to the output voltage can be accomplished

via a trim pot, Figure 2, or a single ﬁ xed resistor as shown in Figures 3 and 4.

A single ﬁ xed resistor can increase or decrease the output voltage depend-

ing on its connection. Fixed resistors should have an absolute TCR less than

100ppm/°C to minimize sensitivity to changes in temperature.

A single resistor connected from the Trim (pin 5) to the +Output (pin 4), see

Figure 3, will decrease the output voltage. A resistor connected from the Trim

(pin 5) to Output Common (pin 6) will increase the output voltage.

Trim adjustment greater than 5% can have an adverse effect on the con-

verter's performance and is not recommended.

20kΩ

5-22

Tu r n s

+INPUT +OUTPUT

COMMON

TRIM

–INPUT

ON/OFF

CONTROL

LOAD

+INPUT +OUTPUT

COMMON

TRIM

–INPUT

ON/OFF

CONTROL

LOAD

RTRIM DOWN

+INPUT +OUTPUT

COMMON

TRIM

–INPUT

ON/OFF

CONTROL

LOAD

RTRIM UP

Figure 2. Trim Connections Using A Trim Pot

Figure 4. Trim Connections To Increase Output Voltage Using Fixed Resistors

Figure 3. Trim Connections To Decrease Output Voltage Using Fixed Resistors

Floating Outputs

Since these are isolated DC/DC converters, their outputs are "ﬂ oating."

Designers will usually use the output Common (pin 6) as the ground/return of

the load circuit. You can, however, use the +Output (pin 4) as ground/return to

effectively reverse the output polarity.

Minimum Output Loading Requirements

1.2 to 5V models employ a synchronous-rectiﬁ er design topology. All models

regulate within spec and are stable under no-load conditions. 12/15V models

employ a traditional forward architecture and require 10% loading (125mA for

12V models, 100mA for 15V models) to achieve their listed regulation specs.

12/15V models also have a minimum-load-for-stability requirement (20mA).

For 12/15V models, operation below 20mA or 10% loading will be stable but

regulation may degrade. A 100μF output capacitor is recommended below 10%

loading. Users should verify whether this relaxed regulation will have any effect

on output circuits. If so, add a small load of 10% or greater.

Operation under no-load conditions will not damage 12/15V converters.

However they may not meet all listed speciﬁ cations.

Filtering and Noise Reduction

All A-Series UWR DC/DC Converters achieve their rated ripple and noise

speciﬁ cations using the external input and output capacitors speciﬁ ed in the

Performance/Functional Speciﬁ cations table. In critical applications, input/

output noise may be further reduced by installing additional external I/O caps.

Input capacitors should be selected for bulk capacitance, low ESR and high

rms-ripple-current ratings. Output capacitors should be selected for low ESR and

appropriate frequency response. All caps should have appropriate voltage ratings

and be mounted 2-3 inches from the converter to achieve published ratings. The

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

particular load and layout conditions.

Input Fusing

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 MPS's A-Series UWR 7-15 Watt DC/DC Converters, you

should use fast-blow type fuses with values no greater than the following.

IN Range Fuse Value

"D12A" Models 3 Amps

"D24A" Models 2 Amps

"D48A" Models 1 Amp

Maximum Case Temperature

The +100 degree C. maximum outside case temperature speciﬁ cation is based

on much empirical testing on encapsulated units. Those tests show that if

the case exterior can be maintained at or below +100C., the hottest internal

components’ package temperatures will not exceed +128C. because of the

internal temperature gradient to the exterior case. This latter +128C. internal

ﬁ gure is a safety margin offering more protection for the internal components.

The +100C. case speciﬁ cation must be achieved by the user’s combination of

lower output current and/or higher airﬂ ow.

If you attempt any of your own case temperature testing, please be aware of

the heatsinking effect of attaching wired thermocouples to surfaces. An infra-

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UWR Models

Single Output,

High-Density,

6 Amp/15 Watt

DC/DC Converters

MDC_UWR_7-15.G03 Page 4 of 12

–16.9

DOWN

RT (k7) = 3.3 – VO

2.49(VO – 1.27)

–16.9

RT (k7) = VO – 3.3

3.16

–2

DOWN

RT (k7) = 1.5 – VO

1.6(VO – 1.23)

–2

RT (k7) = VO – 1.5

1.968

–2.49

DOWN

RT (k7) = 1.8 – VO

0.995(VO – 1.24)

–2.49

RT (k7) = VO – 1.8

1.23

–11

DOWN

RT (k7) = 2.5 – VO

2(VO – 1.24)

–11

RT (k7) = VO – 2.5

2.48

–2

DOWN

RT (k7) = 1.2 – VO

5.32(VO – 0.7)

–2

RT (k7) = VO – 1.2

3.73

–15

DOWN

RT (k7) = 5 – VO

2.49(VO – 2.527)

–15

RT (k7) = VO – 5

6.292

–49.9

DOWN

RT (k7) = 12 – VO

6.34(VO – 5.714)

–49.9

RT (k7) = VO – 12

36.23

DOWN

RT (k7) = 5.0 – VO

7.5(VO – 1.24)

–10

RT (k7) = VO – 4.997

9.3

–63.4

DOWN

RT (k7) = 15 – VO

7.87(VO – 7.136)

–63.4

RT (k7) = VO – 15

56.16

–8.25

where K =

DOWN

RT (k7) = K

1.27

UWR-3.3/4500-D48ANT

RT (k7) =

3.3 – VO

3.3

where K = VO – 3.3

3.3

–6.2

0.78

Model Trim Equation Model Trim Equation

UWR-5/3000-D48ANST

UWR-12/1250-D12A

UWR-12/1250-D24A

UWR-12/1250-D48A

UWR-15/1000-D12A

UWR-15/1000-D24A

UWR-15/1000-D48A

UWR-5/3000-D12A

UWR-5/3000-D24A

UWR-5/3000-D48A

UWR-3.3/4250-D12A

UWR-3.3/4250-D24A

UWR-3.3/4250-D48A

UWR-1.5/6000-D12A

UWR-1.5/6000-D24A

UWR-1.5/6000-D48A

UWR-1.8/6000-D12A

UWR-1.8/6000-D24A

UWR-1.8/6000-D48A

UWR-2.5/6000-D12A

UWR-2.5/6000-D24A

UWR-2.5/6000-D48A

UWR-1.2/6000-D12A

UWR-1.2/6000-D24A

UWR-1.2/6000-D48A

Start-Up Threshold and Undervoltage Shutdown

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

ramping-up input voltage exceeds the Start-Up Threshold Voltage (35V for

"D48A" models). Once operating, devices will not turn off until the input volt-

age drops below the Undervoltage Shutdown/Lockout limit (34V for "D48A"

models). Subsequent re-start will not occur until the input is brought back up to

the Start-Up Threshold. This built-in hysteresis obviously avoids any indetermi-

nate on/off situations at a single voltage.

Start-Up Time

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

ing input voltage crosses the turn-on threshold point and the fully-loaded output

voltage enters and remains within its speciﬁ ed accuracy band. Actual measured

times will vary with input source impedance, external input capacitance, and the

slew rate and ﬁ nal value of the input voltage as it appears to the converter.

The On/Off to VOUT Start-Up Time assumes the converter is turned off via the

On/Off Control with the nominal input voltage already applied to the converter.

The speciﬁ cation deﬁ nes the interval between the time at which the converter

is turned on and the fully-loaded output voltage enters and remains within its

speciﬁ ed accuracy band.

Accuracy of adjustment is subject to tolerances or resistor values and

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

Soldering Guidelines

Murata Power Solutions recommends the speciﬁ cations below when install-

ing these converters. These speciﬁ cations vary depending on the solder type.

Exceeding these speciﬁ cations may cause damage to the product. Be cautious

when there is high atmospheric humidity. Your production environment may

differ; therefore please thoroughly review these guidelines with your process

engineers.

Wave Solder Operations for through-hole mounted products (THMT)

For Sn/Ag/Cu based solders:

Maximum Preheat Temperature 115° C.

Maximum Pot Temperature 270° C.

Maximum Solder Dwell Time 7 seconds

For Sn/Pb based solders:

Maximum Preheat Temperature 105° C.

Maximum Pot Temperature 250° C.

Maximum Solder Dwell Time 6 seconds

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UWR Models

Single Output,

High-Density,

6 Amp/15 Watt

DC/DC Converters

MDC_UWR_7-15.G03 Page 5 of 12

Temperature Derating Curves for UWR 7-15W A-Series

Output Power (Watts)

Ambient Temperature (°C)

D24A and D48A Temperature Derating for 1.5V Output Models

–400 404550556065707580859095100

VIN = 18V-27V (D24A)

VIN = 36V-48V (D48A)

VIN = 18V-30V (D24A)

VIN = 36V-60V (D48A)

VIN = 18V-36V (D24A)

VIN = 36V-75V (D48A)

Output Power (Watts)

Ambient Temperature (°C)

D24A and D48A Temperature Derating for 1.8V Output Models

–400 404550556065707580859095100

VIN = 18V-27V (D24A)

VIN = 36V-48V (D48A)

VIN = 18V-30V (D24A)

VIN = 36V-60V (D48A)

VIN = 18V-36V (D24A)

VIN = 36V-75V (D48A)

Output Power (Watts)

Ambient Temperature (°C)

15.0

13.5

12.0

10.5

9.0

7.5

6.0

4.5

1.5

–400 404550556065707580859095100

VOUT = 2.5V, 5V, 12V and 15V

VOUT = 3.3V

VOUT = 1.8V

VOUT = 1.5V

VOUT = 1.2V

D12A (10-18V) Temperature Derating

Output Power (Watts)

Ambient Temperature (°C)

D24A and D48A Temperature Derating for 3.3V Output Models

–400 404550556065707580859095100

VIN = 18V-27V (D24A)

VIN = 36V-48V (D48A)

VIN = 18V-30V (D24A)

VIN = 36V-60V (D48A)

VIN = 18V-36V (D24A)

VIN = 36V-75V (D48A)

Output Power (Watts)

Ambient Temperature (°C)

15.0

13.5

12.0

10.5

9.0

7.5

6.0

4.5

1.5

–400 404550556065707580859095100

VIN = 18V-27V (D24A)

VIN = 36V-48V (D48A)

VIN = 18V-30V (D24A)

VIN = 36V-60V (D48A)

VIN = 18V-36V (D24A)

VIN = 36V-75V (D48A)

D24A and D48A Temperature Derating for 2.5/5/12 /15V Output Models

The thermal performance of A-Series UWR 7-15 Watt DC/DC Converters is

depicted in the derating curves shown below. All devices, when operated at full

load, in still ambient air, over their full speciﬁ ed input voltage range, can safely

operate to TA maximum. All models, other than the D12A models (10-18 Volt

input range), can operate at higher ambient temperatures if the input range is

narrowed. For example, model UWR-5/3000-D48A can operate safely to +70°C

if the input range is kept between 36 and 48 Volts.

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UWR Models

Single Output,

High-Density,

6 Amp/15 Watt

DC/DC Converters

MDC_UWR_7-15.G03 Page 6 of 12

Load Current (Amps)

Efficiency (%)

= 10V

= 12V

= 18V

0.6 1.2 1.8 2.4 3 3.6 4.2 4.8 5.4 6

UWR-1.8/6000-D12A Efficiency vs. Line and Load

Load Current (Amps)

Efficiency (%)

= 36V

= 48V

= 75V

0.6 1.2 1.8 2.4 3 3.6 4.2 4.8 5.4 6

UWR-1.8/6000-D48A Efficiency vs. Line and Load

Load Current (Amps)

Efficiency (%)

= 18V

= 24V

= 36V

0.6 1.2 1.8 2.4 3 3.6 4.2 4.8 5.4 6

UWR-1.8/6000-D24A Efficiency vs. Line and Load

Load Current (Amps)

Efficiency (%)

= 36V

= 48V

= 75V

0.6 1.2 1.8 2.4 3 3.6 4.2 4.8 5.4 6

UWR-1.5/6000-D48A Efficiency vs. Line and Load

Load Current (Amps)

Efficiency (%)

= 18V

= 24V

= 36V

0.6 1.2 1.8 2.4 3 3.6 4.2 4.8 5.4 6

UWR-1.5/6000-D24A Efficiency vs. Line and Load

Load Current (Amps)

Efficiency (%)

= 10V

= 12V

= 18V

0.6 1.2 1.8 2.4 3 3.6 4.2 4.8 5.4 6

UWR-1.5/6000-D12A Efficiency vs. Line and Load

Typical Performance Curves for UWR 7-15W A-Series

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UWR Models

Single Output,

High-Density,

6 Amp/15 Watt

DC/DC Converters

MDC_UWR_7-15.G03 Page 7 of 12

UWR-3.3/4250-D12A Efficiency vs. Line and Load

Load Current (Amps)

Efficiency (%)

= 10V

= 12V

= 18V

0.4 0.9 1.4 1.8 2.3 2.8 3.3 3.8 4.3

UWR-3.3/4250-D24A Efficiency vs. Line and Load

Load Current

(

)

Efficiency (%)

= 18V

= 24V

= 36V

0.4 0.9 1.4 1.8 2.3 2.8 3.3 3.8 4.3

UWR-3.3/4250-D48A Efficiency vs. Line and Load

0.4 0.9 1.4 1.8 2.3 2.8 3.3 3.8 4.3

Load Current (Amps)

Efficiency (%)

= 36V

= 48V

= 75V

Load Current (Amps)

Efficiency (%)

= 18V

= 24V

= 36V

0.6 1.2 1.8 2.4 3 3.6 4.2 4.8 5.4 6

UWR-2.5/6000-D24A Efficiency vs. Line and Load

Load Current (Amps)

Efficiency (%)

= 10V

= 12V

= 18V

0.6 1.2 1.8 2.4 3 3.6 4.2 4.8 5.4 6

UWR-2.5/6000-D12A Efficiency vs. Line and Load

Load Current (Amps)

Efficiency (%)

= 36V

= 48V

= 75V

0.6 1.2 1.8 2.4 3 3.6 4.2 4.8 5.4 6

UWR-2.5/6000-D48A Efficiency vs. Line and Load

Typical Performance Curves for UWR 7-15W A-Series

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UWR Models

Single Output,

High-Density,

6 Amp/15 Watt

DC/DC Converters

MDC_UWR_7-15.G03 Page 8 of 12

UWR-5/3000-D12A Efficiency vs. Line and Load

Load Current (Amps)

Efficiency (%)

= 10V

= 12V

= 18V

0.3 0.6 1.0 1.3 1.7 2 2.3 2.7 3

UWR-5/3000-D24A Efficiency vs. Line and Load

Load Current (Amps)

Efficiency (%)

= 18V

= 24V

= 36V

0.3 0.6 1.0 1.3 1.7 2 2.3 2.7 3

UWR-5/3000-D48A Efficiency vs. Line and Load

0.3 0.6 1.0 1.3 1.7 2 2.3 2.7 3

Load Current (Amps)

Efficiency (%)

= 36V

= 48V

= 75V

UWR-12/1250-D12A Efficiency vs. Line and Load

Load Current

(

)

Efficiency (%)

= 10V

= 12V

= 18V

0.1 0.2 0.4 0.5 0.7 0.8 1.0 1.1 1.3

UWR-12/1250-D24A Efficiency vs. Line and Load

Load Current (Amps)

Efficiency (%)

= 18V

= 24V

= 36V

0.1 0.2 0.4 0.5 0.7 0.8 1.0 1.1 1.3

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Typical Performance Curves for UWR 7-15W A-Series

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UWR Models

Single Output,

High-Density,

6 Amp/15 Watt

DC/DC Converters

MDC_UWR_7-15.G03 Page 9 of 12

UWR-15/1000-D12A Efficiency vs. Line and Load

0.1 0.2 0.3 0.4 0.6 0.7 0.8 0.9 1

Load Current (Amps)

Efficiency (%)

= 10V

= 12V

= 18V

UWR-15/1000-D24A Efficiency vs. Line and Load

Load Current (Amps)

Efficiency (%)

= 18V

= 24V

= 36V

0.1 0.2 0.3 0.4 0.6 0.7 0.8 0.9 1

UWR-15/1000-D48A Efficiency vs. Line and Load

Load Current (Amps)

Efficiency (%)

= 36V

= 48V

= 75V

0.1 0.2 0.3 0.4 0.6 0.7 0.8 0.9 1

Output Ripple and Noise (PARD)

(VIN = nominal, VOUT = 1.8V @ 6A, two external 0.47µF output capacitors.)

20mV, 1µsec/div, 20MHz BW

Output Ripple and Noise (PARD)

(VIN = nominal, VOUT = 1.5V @ 6A, two external 0.47µF output capacitors.)

20mV, 1µsec/div, 20MHz BW

UWR-12/1250-D48A Efficiency vs. Line and Load

0.1 0.2 0.4 0.5 0.7 0.8 1.0 1.1 1.3

Load Current (Amps)

Efficiency (%)

= 36V

= 48V

= 75V

Typical Performance Curves for UWR 7-15W A-Series

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UWR Models

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6 Amp/15 Watt

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MDC_UWR_7-15.G03 Page 10 of 12

20mV, 1µsec/div, 20MHz BW

Output Ripple and Noise (PARD)

(VIN = nominal, VOUT = 12V @ 1.25A, two ext. 0.47µF output capacitors.)

Output Ripple and Noise (PARD)

(VIN = nominal, VOUT = 15V @ 1A, two external 0.47µF output capacitors.)

20mV, 2.5µsec/div, 20MHz BW

20mV, 1µsec/div, 20MHz BW

Output Ripple and Noise (PARD)

(VIN = nominal, VOUT = 3.3V @ 4.25A, two ext. 0.47µF output capacitors.)

20mV, 1µsec/div, 20MHz BW

Output Ripple and Noise (PARD)

(VIN = nominal, VOUT = 5V @ 3A, two external 0.47µF output capacitors.)

Output Ripple and Noise (PARD)

(VIN = nominal, VOUT = 2.5V @ 6A, two external 0.47µF output capacitors.)

20mV, 1µsec/div, 20MHz BW

Typical Performance Curves for UWR 7-15W A-Series

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UWR Models

Single Output,

High-Density,

6 Amp/15 Watt

DC/DC Converters

MDC_UWR_7-15.G03 Page 11 of 12

Optional Functions

The A-Series 7-15W DC/DC Converters offer numerous electrical/ mechanical

options. Per the Ordering Guide on page 2, the trailing "A" (A-Series) in each

part number pertains to the base part number. Part-number sufﬁ xes are added

after the "A," indicating the selection of standard options. The resulting part

number is a "standard product" and is available to any customer desiring that

particular combination of options. As described below, selecting certain options

will result in the installation of additional pins in certain locations.

Sufﬁ x Description

Blank No VOUT Trim or On/Off Control functions added (no I/O pins

installed in the pin 3 and pin 5 positions). The pin length remains at

0.2inches (5.08 mm).

TAdd a VOUT Trim function on pin 5. No pin 3 installed.

CAdd an On/Off Control function on pin 3 (with positive polarity). No

pin 5 installed.

CT Add the On/Off Control function (with positive polarity) on pin 3 and

add the VOUT trim function on pin 5.

NAdd an On/Off Control function on pin 3 with negative polarity. No

pin 5 installed.

NT Add the On/Off Control function with negative polarity on pin 3 and

add the VOUT trim function on pin 5.

L1 Trim the pin length to 0.110 ±0.010 inches (2.79 ±0.25mm). This

option requires a minimum order quantity.

L2 Trim the pin length to 0.145 ±0.010 inches (3.68 ±0.25mm). This

option requires a minimum order quantity.

-C RoHS-6 hazardous substance compliance (does not claim EU RoHS

exemption 7b, lead in solder).

* Note: Usage of consecutive "C" and "-C" designations is correct for some

models. Example: UWR-5/3000-D48AC-C

Adaptations

There are various additional conﬁ gurations available on A-Series 7-15W DC/DCs.

Because designating each of them with a standard part-number sufﬁ x would

result in an unmanageable matrix of part numbers, such are designated by

MPS and assigned 5-digit "part-number sufﬁ xes.

UWR-3.3/4250-D48AT-30690

Standard product, 48VIN, 3.3VOUT/4.25A with a VOUT Trim function added in

the pin 3 position, with adapted current limit set point to 6.5A min. and with

removed Input Overvoltage Shutdown function.

UWR-5/3000-D48ACT-30770

UWR-5/3000-D48ACT-30770-Y (RoHS-5)

Standard product, 48VIN, 5VOUT/3A. On/Off Control function (positive polarity)

onpin 3, VOUT, Trim function added on pin 5. Adaptations: Trim equations are

Tyco/Lucent-compatible. Transformer isolation system has been enhanced to

meet the basic insulation requirements of UL60950-1/EN60950-1. I/O pins

are 25-mil-square Tyco/Lucent compatible. Shielded metal case is connected

to +VIN pin 1. Input Overvoltage Shutdown function has been removed.

UWR-3.3/4500-D48ANT

Standard UWR-3.3/4250-D48A, 48VIN, 3.3VOUT with slightly higher output

current (4.5A), negative on/off polarity control and a special competitive-

compatible trim.

UWR-3.3/4500-D48ANT accepts trim adjustments to ±10% of nominal VOUT

not to exceed 15W of maximum output power. Users should carefully consider

the amount of trim added since excessive positive trim may exceed the

overvoltage protection. Excessive negative trim may interfere with proper

regulation.

UWR-3.3/4500-D48ANST Special trim version. See page 5.

UWR-5/3000-D48ANSTHL2-Y

UWR-3.3/4500-D48ANTHL2-Y

Negative on/off polarity, special trim, conformal coating added, 3.68mm pin

length, RoHS-5 compliance (with lead). RoHS-5 compliance requires a sched-

uled quantity order. Not all RoHS-5 “-Y” models are available. Please contact

Product Marketing for further information.

Wide Range Input

Output Conﬁ guration:

U = Unipolar

Nominal Output Voltage:

1.2, 1.5, 1.8, 2.5, 3.3, 5, 12 or 15 Volts

Maximum Output Current

in mA

Input Voltage Range:

D12 = 10-18 Volts (12V nominal)

D24 = 18-36 Volts (24V nominal)

D48 = 36-75 Volts (48V nominal)

U WR 3000-/ D48 A-5 CT

A-Series

High Reliability

Optional Functions

*Note: Not all model number combinations may be available. Contact MPS.

C-

RoHS-6 Compliant*

PART NUMBER STRUCTURE

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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. Speciﬁ cations are subject to change without

Murata Power Solutions, Inc.

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

ISO 9001 and 14001 REGISTERED

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/

UWR Models

Single Output,

High-Density,

6 Amp/15 Watt

DC/DC Converters

MDC_UWR_7-15.G03 Page 12 of 12