Patent
Zvs control circuit for use in a flyback power converter
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TLDR
In this paper, a ZVS (zero voltage switching) control circuit for use in a flyback power converter includes a primary side controller and a secondary side controller, each of which generates a switching signal to control a power transformer through a power transistor to generate output voltage.Abstract:
A ZVS (zero voltage switching) control circuit for use in a flyback power converter includes a primary side controller and a secondary side controller. The primary side controller generates a switching signal to control a power transformer through a power transistor to generate an output voltage. The secondary side controller generates an SR (synchronous rectifier) signal to control an SR transistor at a secondary side of the power transformer. The SR signal includes an SR-control pulse and a ZVS pulse. The SR-control pulse controls the SR transistor according to a demagnetizing period of the power transformer. The ZVS pulse determines the starting timing of the switching signal to achieve zero voltage switching for the power transistor. The secondary side controller generates the ZVS pulse after a delay time from when the power transformer is demagnetized. The delay time is determined according to an output load of the output voltage.read more
Citations
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Patent
Flyback power converter and ZVS control circuit and control method thereof
TL;DR: In this paper, a ZVS (zero voltage switching) control circuit for controlling a flyback power converter includes: a primary side controller circuit for generating a switching signal, to control the primary side switch; and a secondary side control signal for controlling the synchronous rectifier (SR) switch.
Patent
Flyback powr converter and secondary side controller circuit and control method thereof
TL;DR: In this paper, a flyback power converter includes a primary side controller circuit for controlling the primary side switch and a secondary side controller for generating an SR (Synchronous Rectification) signal to control an SR switch.
Patent
Flyback power converter circuit and control circuit and control method thereof
TL;DR: A flyback power converter circuit includes a transformer, a primary side switch, a secondary side control circuit, and a dummy load circuit, coupled to the output voltage, which is used to determine the feedback signal, so that the internal voltage is not undesirably low as mentioned in this paper.
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Control method and circuit for preventing bilateral common of switching converter and converter
Zhang Chenglong,Guo Chunming +1 more
TL;DR: In this article, the authors present a control method and circuit for preventing the bilateral common of a switching converter and the converter, which includes a primary switching device and a secondary switching device.
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Systems and methods of synchronous rectification in active clamp flyback power converters
Chopra Dhruv,Tichy Tomas +1 more
TL;DR: Synchronous rectification in active clamp flyback power converters was studied in this article, where the secondary rectifier was made conductive by the secondary driver during a discharge mode of the transformer.
References
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Patent
Offset resonance zero volt switching flyback converter
TL;DR: In this article, a continuous mode flyback converter circuit which includes elements capable of generating a zero volt switching (ZVS) signal across the power switch is described, where the ZVS generating elements include a switched shunt inductance coupled in parallel with active clamp components and connected across the primary winding of the power transformer.
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