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LT8315 83% Efficiency 5V/1.5A Isolated Flyback Converter

Figure 10. 83% Efficiency 5V/1.5A Isolated Flyback Converter

The LT®8315 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.