WRA-YQD-20&WRB-YQD-20W Series
20W, WIDE INPUT, ISOLATED & REGULATED DUAL/SINGLE OUTPUT DC-DC CONVERTER
SELECTION GUIDE
Input voltage range
(VDC)
Output voltage
(VDC)
Output current
max.(mA)
Order code
Efficiency typ.(%)
WRA1205YQD-20W
WRA1212YQD-20W
WRA1215YQD-20W
WRA1224YQD-20W
WRA2405YQD-20W
WRA2412YQD-20W
WRA2415YQD-20W
WRA2424YQD-20W
WRA4805YQD-20W
WRA4812YQD-20W
WRA4815YQD-20W
WRA4824YQD-20W
WRB1205YQD-20W
WRB1212YQD-20W
WRB1215YQD-20W
WRB1224YQD-20W
WRB2405YQD-20W
WRB2412YQD-20W
WRB2415YQD-20W
WRB2424YQD-20W
WRB4805YQD-20W
WRB4812YQD-20W
WRB4815YQD-20W
WRB4824YQD-20W
9~18
9~18
±5
±12
±15
±24
±5
±12
±15
±24
±5
±12
±15
±24
5
±2000
±833
±667
±417
±2000
±833
±667
±417
±2000
±833
±667
±417
4000
1667
1333
833
78
82
80
83
79
82
83
78
80
84
85
78
79
80
80
78
82
82
83
78
80
84
85
79
9~18
9~18
FEATURES
18~36
18~36
18~36
18~36
36~72
36~72
36~72
36~72
9~18
◆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
9~18
12
9~18
15
9~18
24
18~36
18~36
18~36
18~36
36~72
36~72
36~72
36~72
5
4000
1667
1333
833
12
15
24
◆MTBF>1000Khours
5
4000
1667
1333
833
◆High reliability
12
15
◆3 year warranty
24
MODEL SELECTION
①
②
③
④
⑤
⑥
WRB 24 12 Y QD -20W(1667)
①Product Series ②Input Voltage
③Output Voltage ④Wide (2:1) Input Range
⑤2"×2"DIP Package Style
SPECIFICATION
Ripple&Noise(max.)
(Note.2)
100mVp-p
±0.5%
⑥Rated Power(Output current)
OUTPUT
Line Regulation
Load Regulation
(Note.3)
(Note.4)
±0.5%
Above 105% rated output power
APPLICATIONS
Overload
Protection type : Over power limiting, recovers automatically after fault
condition is removed
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.)
XX03 :3.8~4.95V
XX12:13.8 ~ 18V
XX05 :5.75 ~ 7.5V
PROTECTION
Over Voltage
XX15:17.25 ~ 22.5V
Protection type : Shut off o/p voltage, clamping by zener diode
Protection type : Constant current limiting, recovers automatically after
fault condition is removed
Short Circuit
Logic "1" or open: power on
FUNCTION
ON/OFF Control
Logic "0" short to Vin-: power off
Working Temp.
-25~+85℃(Refer to output load derating curve)
ENVIRONMENT
Storage Temp.,Humidity
Temp. Coefficient
-25~+85℃, 0~95% RH
±0.03%/ ℃（0~50℃）
Design refer to LVD
Safety Standards
Isolation Voltage
Isolation Resistance
SAFETY&EMC
(Note 5)
I/P-O/P:1.5KVDC
I/P-O/P:100M Ohms/500VDC
MTBF
322.4K hrs min.
MIL-HDBK-217F (25℃)
OTHERS
Dimension
Packing
50.8×50.8×16mm (2"×2"×0.63") (L×W×H)
110g;150pcs/15.8Kg/0.97CUFT
MICRODC RESERVES THE COPYRIGHT
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.
NOTE
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.
http://www.microdc.cn
Technical Enquiries-Email:tech@microdc.cn Tel:0086-20-86000646
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MICRODC [ MICRODC POWER TECHNOLOGY CO., LTD ]
