Class 1 Mulitple Output High Efficiency Flyback Converter for PoE Applications Reference Design
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This converter is used for Class 1 PoE applications where high-efficiency and multiple-outputs are required. The multi-outputs for this design are 3.3V/0.7A, 5V/0.145A, 3.3V/1.5A. The flyback converter with synchronous rectifier provides excellent efficiency, and small size for PoE applications, such as an IP phone solution.
The TPS23785B contains both the PoE powered device and the PWM controller functions.
- Multiple outputs for 3.3V/0.7A, 5V/0.145A, 3.3V/1.5A
- High efficiency (89%)
- Isolated flyback with synchronous rectifier
- Small solution size
- Uses TPS23785 with PoE interface PD and PWM controller
- This circuit design is full-functional tested and recommended for new designs.