WRA-YQD-20&

WRA-YQD-20&

WRA-YQD-20&

WRA-YQD-20&

WRA-YQD-20&

WRA-YQD-20&

WRA-YQD-20&

WRB-YQD-

WRB-YQD-

WRB-YQD-

WRB-YQD-

WRB-YQD-

WRB-YQD-

2

2

2

2

2

2

0W

0W

0W

0W

0W

0W

Series

http://www.microdc.cn

Technical Enquiries-Email:tech@microdc.cn Tel:0086-20-86000646

Page 1 of 3

MICRODC RESERVES THE COPYRIGHT

2

2

2

20

0

0

0W,

W,

W,

W, WIDE

WIDE

WIDE

WIDE INPUT,

INPUT,

INPUT,

INPUT, ISOLATED

ISOLATED

ISOLATED

ISOLATED &

&

&

& REGULATED

REGULATED

REGULATED

REGULATED DUAL/

DUAL/

DUAL/

DUAL/SINGLE

SINGLE

SINGLE

SINGLE OUTPUT

OUTPUT

OUTPUT

OUTPUT DC-DC

DC-DC

DC-DC

DC-DC CONVERTER

CONVERTER

CONVERTER

CONVERTER

FEATURES

FEATURES

FEATURES

FEATURES

FEATURES

FEATURES

FEATURES

FEATURES

◆

Wide 2:1 DC input range

◆

In/out capacitance1000pF

◆

Protections : Short circuit / Overload / Over voltage

◆

1500VDC I/O isolation for D/D

◆

Cooling by free air convection

◆

Built-in remote ON-OFF control

◆

100% full load burn-in test

◆

Fixed switching frequency at 225KHz

◆

Lost cost

◆

MTBF>1000Khours

◆

High reliability

◆

3 year warranty

APPLICATIONS

APPLICATIONS

APPLICATIONS

APPLICATIONS

APPLICATIONS

APPLICATIONS

APPLICATIONS

APPLICATIONS

MODEL

MODEL

MODEL

MODEL

MODEL

MODEL

MODEL

SELECTION

SELECTION

SELECTION

SELECTION

SELECTION

SELECTION

SELECTION

WRB

WRB

WRB

WRB

WRB

WRB

WRB

WRB

①

24

24

24

24

24

24

24

24

②

12

12

12

12

12

12

12

12

③

Y

Y

Y

Y

Y

Y

Y

Y

④

Q

Q

Q

Q

Q

Q

Q

D

D

D

D

D

D

D

⑤

2

2

2

2

2

2

0W

0W

0W

0W

0W

0W

1667

1667

1667

1667

1667

1667

⑥

①Product Series

②Input Voltage

③Output Voltage

④Wide (2:1) Input Range

⑤2"×2"DIP Package Style

⑥Rated Power(Output current)

The WRA(B)-YQD-20W Series of DC/DC

converters has been designed for a wide range of

applications including communications, industrial

systems and battery powered mobile equipments.

Key features are high power density and 2:1 wide

input ranges of 18~36 VDC and 36~72 VDC.(But

also can do high power density and 4:1 ultrawide

input ranges of 9~36 VDC and 18~72 VDC.)

SELECTION

SELECTION

SELECTION

SELECTION

SELECTION

SELECTION

SELECTION

GUIDE

GUIDE

GUIDE

GUIDE

GUIDE

GUIDE

GUIDE

Order code

Input voltage range

(VDC)

Output voltage

(VDC)

Output current

max.(mA)

Efficiency typ.(%)

WRA1205YQD-20W

9~18

±5

±2000

78

WRA1212YQD-20W

9~18

±12

±833

82

WRA1215YQD-20W

9~18

±15

±667

80

WRA1224YQD-20W

9~18

±24

±417

83

WRA2405YQD-20W

18~36

±5

±2000

79

WRA2412YQD-20W

18~36

±12

±833

82

WRA2415YQD-20W

18~36

±15

±667

83

WRA2424YQD-20W

18~36

±24

±417

78

WRA4805YQD-20W

36~72

±5

±2000

80

WRA4812YQD-20W

36~72

±12

±833

84

WRA4815YQD-20W

36~72

±15

±667

85

WRA4824YQD-20W

36~72

±24

±417

78

WRB1205YQD-20W

9~18

5

4000

79

WRB1212YQD-20W

9~18

12

1667

80

WRB1215YQD-20W

9~18

15

1333

80

WRB1224YQD-20W

9~18

24

833

78

WRB2405YQD-20W

18~36

5

4000

82

WRB2412YQD-20W

18~36

12

1667

82

WRB2415YQD-20W

18~36

15

1333

83

WRB2424YQD-20W

18~36

24

833

78

WRB4805YQD-20W

36~72

5

4000

80

WRB4812YQD-20W

36~72

12

1667

84

WRB4815YQD-20W

36~72

15

1333

85

WRB4824YQD-20W

36~72

24

833

79

SPECIFICATION

SPECIFICATION

SPECIFICATION

SPECIFICATION

SPECIFICATION

SPECIFICATION

SPECIFICATION

SPECIFICATION

OUTPUT

Ripple&Noise(max.)

(Note.2)

100mVp-p

Line Regulation

(Note.3)

±0.5%

Load Regulation

(Note.4)

±0.5%

PROTECTION

Overload

Above 105% rated output power

Protection type : Over power limiting, recovers automatically after fault

condition is removed

Over Voltage

XX03 :3.8~4.95V

XX05 :5.75 ~ 7.5V

XX12:13.8 ~ 18V

XX15:17.25 ~ 22.5V

Protection type : Shut off o/p voltage, clamping by zener diode

Short Circuit

Protection type : Constant current limiting, recovers automatically after

fault condition is removed

FUNCTION

ON/OFF Control

Logic "1" or open: power on

Logic "0" short to Vin-: power off

ENVIRONMENT

Working Temp.

-25~+85℃ (Refer to output load derating curve)

Storage Temp.,Humidity

-25~+85℃, 0~95% RH

Temp. Coefficient

±0.03%/ ℃（0~50℃）

SAFETY&EMC

(Note 5)

Safety Standards

Design refer to LVD

Isolation Voltage

I/P-O/P:1.5KVDC

Isolation Resistance

I/P-O/P:100M Ohms/500VDC

OTHERS

MTBF

322.4K hrs min.

MIL-HDBK-217F (25℃)

Dimension

50.8×50.8×16mm (2"×2"×0.63") (L×W×H)

Packing

110g;150pcs/15.8Kg/0.97CUFT

NOTE

1. All parameters are specified at normal input, rated load, 2570% RH ambient.

2. Ripple & noise are measured at 20MHz of bandwidth by using a 12" twisted

pair-wire terminated with a 0.1uf & 47uf parallel capacitor.

3.Line regulation is measured from low line to high line at rated load.

4.Load regulation is measured from 10% to 100%rated load

5. Please prevent the converter from operating in overload or short circuit condition for

more than 30 seconds.