UWR-12/1250-D5A(2008) 查看數據表（PDF） - Murata Manufacturing

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UWR-12/1250-D5A
(Rev.:2008)

Single Output, High Reliability, 2" x 2", 14-20 Watt, DC/DC Converters

Murata Manufacturing 

UWR Series

Single Output, High Reliability, 2" x 2", 14-20 Watt, DC/DC Converters

Performance/Functional Specifications

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

Input

Input Voltage Range:

D5A Models

D12A Models

D48A/D48E Models

4.7-7.5 Volts (5V nominal)

9-36 Volts (24V nominal)

18-75/36-72 Volts (48V nominal)

Input Current

See Ordering Guide

Input Filter Type 

Pi (C-type for D5A models)

Overvoltage Shutdown:

D5A Models

D12A Models

D48A and /D48E Models

10 Volts

40 Volts

80 Volts

Reverse-Polarity Protection

Yes (Instantaneous, 10A maximum)

On/Off (Sync.) Control (Pin 4) €

TTL high = off, low (or open) = on

Output

VOUT Accuracy (50% load)

±1%, maximum

Temperature Coefficient

±0.02% per °C

Ripple/Noise (20MHz BW) 

See Ordering Guide

Line/Load Regulation

See Ordering Guide

Efficiency

See Ordering Guide

Isolation Voltage 

1500Vdc guaranteed

Isolation Capacitance

550pF

Current Limiting

Auto-recovery

Overvoltage Protection

Zener/transorb clamp, magnetic feedback

Dynamic Characteristics

Transient Response (50% load step) 200μsec max. to ±1.5% of final value

Switching Frequency

165kHz (±15kHz)

Environmental

Operating Temperature (Ambient):

Without Derating

With Derating

–40 to +40/50/55/65°C (Model dependent)

to +100°C (See Derating Curves)

Storage Temperature

-40 to +105°C

Flammability

UL94V-0

Physical

Dimensions

2" x 2" x 0.45" (51 x 51 x 11.4mm)

Shielding

5-sided

Case Connection:

D5A, D12A Models

D48A, D48E Models

Case Material

enamel finish and plastic baseplate

Pin 2 (–VIN)

Pin 1 (+VIN)

Corrosion resistant steel with

non-conductive, epoxy-based, black

Pin Material

RoHS: Gold-plated copper alloy

Non-RoHS: Tin over copper alloy

Weight

2.7 ounces (76.5 grams)

~ These converters require a minimum 10% loading to maintain specified regulation. Opera-

tion

under no-load conditions will not damage these devices; however they may not

meet all listed

specifications.

 Application-specific internal input/output filtering can be recommended and perhaps

added

internally upon request. Contact DATEL Applications Engineering for details.

€ Applying a voltage to the Control pin when no input power is applied to the converter

can cause permanent damage to the converter.

 "D48A" models have BASIC, all other models have Functional insulation.

Devices can be screened or modified for higher guaranteed isolation voltages. Contact

DATEL Applications Engineering for details.

‚ Except for 3.3V outputs which have no protection.

Absolute Maximum Ratings

Input Voltage:

"D5A" Models

"D12A" Models

"D48A" and "D48E" Models

Input Reverse-Polarity Protection

Output Overvoltage Protection:

3.3V Outputs

5V/5.2V Outputs

12V Outputs

15V Outputs

Output Current

Storage Temperature

Lead Temperature

11 Volts

44 Volts

88 Volts

Current must be <10A. Brief

duration only. Fusing recommended.

No protection

6.8 Volts, limited duration

15 Volts, limited duration

18 Volts, limited duration

Current limited. Max. current and

short-circuit duration are model

dependent

–40 to +105°C

See soldering guidelines

These are stress ratings. Exposure of devices in excess 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.

TECHNICAL NOTES

Floating Outputs

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

Users may ground either the Common (pin 7) for normal usage or the posi-

tive side (+Output, pin 6) to effectively reverse the output polarity.

Filtering and Noise Reduction

All A-Series UWR 14-20 Watt DC/DC Converters achieve their rated ripple

and noise specifications without the use of external input/output capaci-

tors. In critical applications, input/output noise may be further reduced by

installing electrolytic capacitors across the input terminals and/or low-ESR

tantalum or electrolytic capacitors across the output terminals. The caps

should be located as close to the power converters as possible. Typical

values are listed below. In many applications, using values greater than

those listed will yield better results.

To Reduce Input Ripple

D5A Models

D12A Models

D48A Models

47μF, 16V

20μF, 50V

20-50μF, 100V

To Reduce Output Ripple

3.3V Outputs

5V/5.2V Outputs

12/15V Outputs

100μF, 6V, Low ESR

47μF, 10V, Low ESR

22μF, 20V, Low ESR

In critical, space-sensitive applications, DATEL may be able to tailor the

internal input/output filtering of these units to meet your specific require-

ments. Contact our Applications Engineering Group for additional details.

www.murata-ps.com

Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000

MDC_UWR14-20 Series.B02 Page 3 of 6

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