dc to dc converter
[ Typical performance ]
  • ◆ Wide Input voltage range (2:1 or 4:1)
  • ◆ Typical Efficiency 80%
  • ◆ Switching frequency:300KHz ± 30 KHz
  • ◆ Short circuit protection,Self-furbish
  • ◆ Input-output isolate (500/1000/1500Vdc)
  • ◆ PCB Board in-line type installs
  • ◆ Metal case, Low Output Ripple
[ Temperature graph ]
dc to dc converter
Input Min Nom Max Notes
Input voltage 4.5 5 9 2:1
  9 12 18 2:1
18 24 36 2:1
36 48 72 2:1
72 110 144 2:1
10 12 36 4:1
18 48 72 4:1
Remote ON/OFF Non
Input undervoltage protection Lower than the low-input voltage protection ,Self-furbish
[ Output ]
Voltage accuracy Vo1,Vo2 ±1.0%, ±2.0%
Line regulation

Nominal Load,full voltage range

Vo1,Vo2 ±0.2%, ±1.5%
Load regulation 20% ~ 100% rated voltage Vo1,Vo2 ±0.5%, ±4.0%
Ripple and noise 20MHz BM (Full Load)  Vo≤5.0V, ≤50mVp-p;  Vo≥48V, ≤180mVp-p;  Other, ≤100mVp-p
Dynamic response 25% Nominal load step hange(increase or reduce) △Vo1/△t ±4.0/500us%
Voltage adjust Nominal output Non
Start delay time Typical value ≤200mS
[ General ]
Efficiency Nominal input,Full load Vo≤5.0V,78%(Typical) Vo>5.0V,80%(Typical)
Switching frequency 300KHz (Typical) (max)330KHz
Operating temperature Free air Industrial level -25℃ ~ +55℃
Military level -40℃ ~ +85℃
Storage temperature Industrial level -40℃ ~ +105℃
Military level -55℃ ~ +120℃
Max case temperature Industrial level +100℃
Military level +110℃
Relative humidity 10%~90%
case material Metal case
Isolation Voltage 500/1000/1500 Vdc ≤0.5mA/1min, 500Vdc ≤0.5mA/1min
MTBF 200000Hrs
[ Product Nomination Method ]
Wide range voltage input: 2:1
Power convert mode D (DC-DC)
Output Watt
Input voltage
S: Single output D: dual output
Output voltage

J: Indicate Military level,Non: Indicate Industrial level .G : Indicate input output no isolate .I : Indicate dual output isolate .W : Indicate wide range voltage input: 4:1

[ Typical product tabulates ]
Output voltage / current
  • VO1
  • VO2
  • VO3
  • V
  • mA
  • V
  • mA
  • V
  • mA
WD3-□S3V3

5V(4.5~9V)
12 V(9~18V)

3.3V 600mA
WD3-□S05 5V 600mA
WD3-□S09 9V 330mA
WD3-□S12 12V 250mA
WD3-□S15 15V 200mA
WD3-□S24 24V 125mA
WD5-□S3V3 3.3V 1000mA
WD5-□S05 5V 1000mA
WD5-□S09 9V 550mA
WD5-□S12 12V 410mA

WD5-□S15

15V 330mA

WD5-□S24

24V 210mA
WD3-□D3V3

5V(4.5~9V)
12 V(9~18V)
24V(18~36V)
48V(36~72V)
110V(72~144V)
12V(10~36V)
48V(18~72V)

+3.3V 300 mA -3.3V 300 mA
WD3-□D05 +5V 300 mA -5V 300 mA
WD3-□D09 +9V 165 mA -9V 165 mA
WD3-□D12 +12V 125 mA -12V 125 mA
WD3-□D15 +15V 100 mA -15V 100 mA
WD3-□D24 +24V 60 mA -24V 60 mA
WD5-□D3V3 +3.3V 500 mA -3.3V 500 mA
WD5-□D05 +5V 500 mA -5V 500 mA
WD5-□D09 +9V 275 mA -9V 275 mA
WD5-□D12 +12V 205 mA -12V 205 mA
WD5-□D15 +15V 165 mA -15V 165 mA
WD5-□D24 +24V 100 mA -24V 100 mA
[ Mechanical Date ]
[ Mechanical Date ]
Package Code L x W x H  unit:mm Package No
--- 25.40 x 25.40  x 10.16 100100DC
[ Pin Assignments ]
Pin No 1 2 3 4 5
Single -Vin +Vin +Vout NP GND
Dual -Vin +Vin +Vout1 COM -Vout2
*Note:The power modules such as the definition of the pin does not match with the data sheet ,please refer to the actual item.