The PMP20657 reference design is a compact, efficient unidirectional 48V to 12V @ 400W power converter. The design is pseudo-isolated to protect 12V loads. The phase-shifted full-bridge topology achieves over 95% peak efficiency. Light-load mode enables <100mW standby power with full regulation on 12V. 300kHz/600kHz switching frequency provides a small solution size.
Features
- <100mW no-load power consumption designed for automotive 48V battery
- Synchronous rectification and adaptive delays for high peak efficiency
- 300kHz/600kHz switching frequency for 2.5" x 3.5" powertrain
- Pseudo-isolation to protect 12V loads
- Low-cost, all ceramic output capacitor solution