The LT8315EFEPBF is a high voltage flyback converter with integrated 630V/300mA switch. No opto-isolator is needed for regulation. The device samples the output voltage from the isolated flyback waveform appearing across a third winding on the transformer. Quasi-resonant boundary mode operation improves load regulation, reduces transformer size, and maintains high efficiency.
At start-up, the LT8315EFEPBF charges its INTVCC capacitor via a current source attached to the DRAIN pin. During normal operation, the current source turns off and the device draws its power from a third winding on the transformer.
The LT8315EFEPBF operates from a wide range of input supply voltages and can deliver up to 15W of power. It is available in a thermally enhanced 20-pin TSSOP package with four pins removed for high-voltage spacing.
Feature
- Wide Input Voltage Range: 18V to 560V
- 630V/300mA Integrated Power Switch
- No Opto-Isolator Required for Regulation
- Quasi-Resonant Boundary Mode Operation
- Constant-Current and Constant-Voltage Regulation
- Low-Ripple Light Load Burst Mode® Operation
- Low Quiescent Current: 70μA
- Programmable Current Limit and Soft-Start
- TSSOP Package with High Voltage Spacing
Applications
- Isolated Telecom, Automotive, Industrial, Medical Power Supplies
- Isolated Off Line Housekeeping Power Supplies
- Electric Vehicles and Battery Stacks
