Power converter and method of control thereof

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United States of America Patent

PATENT NO RE50277
SERIAL NO

16931904

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Abstract

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A flyback power converter includes a hybrid clamp circuit and a corresponding power management unit that substantially optimizes the performance of the flyback power converter in its entire line and load ranges. The clamp circuit, which is connected in parallel to a primary winding of the flyback transformer, includes a parallel combination of a capacitor and resistor that is connected in series with a parallel combination of a switch and a diode. By sensing the operating conditions, the power management circuit configures the clamp circuit either as a passive clamp or as an active clamp. In the passive-clamp configuration, the switch is kept turned off. In the active-clamp configuration, the switch operates with pulse-width modulation (PWM) which enables ZVS turn-on of the main switch.

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Patent Owner(s)

Patent OwnerAddress
DELTA ELECTRONICS INCTAOYUAN CITY 320023

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chang, Chien-Chung Taoyuan, TW 29 237
Huber, Laszlo Cary, US 15 448
Jovanovic, Milan M Cary, US 48 2593
Song, Haibin Shanghai, CN 42 283
Xu, Daofei Shanghai, CN 47 203
Zhang, Alpha Shanghai, CN 2 25

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