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1. (WO2017069785) PRIMARY SIDE REGULATED FLYBACK CONVERTER WITH CALIBRATED OUTPUT VOLTAGE

Pub. No.:    WO/2017/069785    International Application No.:    PCT/US2015/057255
Publication Date: Fri Apr 28 01:59:59 CEST 2017 International Filing Date: Sat Oct 24 01:59:59 CEST 2015
IPC: H02M 3/335
H02M 1/00
Applicants: DIALOG SEMICONDUCTOR INC.
Inventors: YAO, Jianming
SHI, Fuqiang
Title: PRIMARY SIDE REGULATED FLYBACK CONVERTER WITH CALIBRATED OUTPUT VOLTAGE
Abstract:
A variable-level flyback power converter is configured to provide an accurate output voltage at various regulation levels. The variable-level flyback power converter may include a switch coupled to a secondary winding of a transformer, a diode coupled to a primary winding of the transformer, and a controller coupled to the switch. The controller may scale an initial reference voltage based on a desired output voltage and a forward voltage drop across the diode, compare the scaled reference voltage with a feedback voltage sensed at an auxiliary winding of the transformer to generate an error signal, and modulate a pulse signal provided to the switch based on the error voltage.