VDH Dual Isolated Dual Output Modular Power Supply: VDHXXXXH-1W/2W series products with 3KVAC isolation, wide voltage input, 8KV anti-static, self-recovery overload and short-circuit protection, and regulated dual-isolated dual-output function. VDH series products are designed according to the new national safety regulations for medical and power instrumentation industries. The products are designed to meet the 4KVAC pulse group isolation between inputs and outputs, and 2KVAC isolation between output 1 and output 2, on the basis of which 8KV anti-static and self-recovery overload and short-circuit protection are added to each output.

   Typical applications of DC-DC power modules (modular power supply), voltage polarity conversion, selection of external filter capacitors, overload and short-circuit protection circuits and series-parallel use are described in detail. Correct use can extend the service life of the product to avoid interference, overheating, self-excitation, poor start-up and other phenomena and irreparable damage.

Input Voltage　　　　　　　　　　 

5V / 9V / 12V / 15V / 24VDC 

Output Voltage

( +/- , +/- ) 3.3V / 5V / 9V / 12V / 15VDC 

For other specifications, please contact Shunyuan Technology Co. 

Electrical Characteristics 

The following data are measured at TA=25° C, nominal input voltage, and rated output current, unless otherwise noted.

Input Characteristics 

Voltage Range +/- 10%* nominal  

Filtering Ceramic Capacitors

Isolation Characteristics 

Rated Voltage 3000 VAC  

Leakage Current 1 mA   

Resistance 109 Ohm  

Capacitance 60 pTYP

Output Characteristics 

Voltage Accuracy +/- 2%* nominal max. 

( 20 MHz BW) Ripple and Noise 50mV p-p, max.  

Sustained short-circuit time Instantaneous (<1s) 

Linear Voltage Calibration +/- 1.2% / 1.0% of Vin 

Load Voltage Calibration +/- 8 %, load = 20 ~ 100

Temperature Coefficient +/- 0.02%/°C  

General Characteristics 

Efficiency 70% to 80   

Switching Frequency 80 - 125KHz  

Environmental Characteristics 

Operating temperature (ambient) - 40° C to + 85° C   

Storage temperature - 55 °C to + 125 °C   

Reduced nominal value See temperature characteristics graph 

Humidity ≤ 90%, uncompressed 

Cooling method Natural air cooling

Volume Characteristics

SIP package size 1W/2W: 32 x 13.8 x 8.8 mm  

Weight 5 - 6 g  

Housing material Non-conductive flame retardant black plastic

Grid Instrumentation 8KV Anti-Static 6KV Multi-Circuit Highly Isolated Power Module with Overload Protection: WDH-1W/2W Series