Circuit Design of 60W DC-DC Forward Synchronous Rectifier Converter

GW MB10F 0.8A 1000V rectifier bridge

Probe current voltage pin 420*4450 head diameter 5.0 over current current and voltage pin

Summary:

DPA-Swi tch greatly simplifies the design compared to designs that use separate devices. The capacitively coupled synchronous rectification drive used in the design is useful for higher voltage outputs, still allowing passive MOSFET drive, and no gate overvoltage due to direct drive of the resistor.

design feature

• Small number of components
• High efficiency: 91.5% efficiency at 36 VDC input with synchronous rectification
• Capacitively coupled synchronous rectification enables higher output voltages without over-stressing the MOSFET gate
• No need for current sense resistors or current transformers
• Output overload, open loop and over temperature protection
• 300 kHz switching frequency allows for adequate transformer reset time
• 3.55 x 2.1 x 0.6 inches (approximately 13.4 W/cubic inch)

60W DC-DC converter circuit diagram using DPA426R

See the uploading documentation for details (click to download)