Csmc Technologies Fab2 Co., Ltd.

Xiaohui Ma

Guoding Dai

Jing Lu

Yue Chen

ChaoYao Xue

Jian Ou

Hui Han

Renyue Ma

An output over-voltage protection circuit for power factor correction, which includes a chip external compensation network, a chip external resistor divider network, a static over-voltage detection circuit, a dynamic over-voltage detection circuit and a compare circuit; The chip external compensation network is connected between the chip external resistor divider network and the dynamic over-voltage detection circuit, the chip external compensation network converts the dynamic over-voltage signal conversion to the dynamic current signal and conveys it to the dynamic over-voltage detection circuit, the dynamic over-voltage detection circuit detects the dynamic current signal and ultimately produces the dynamic over-voltage signal (DYOVP); The dynamic over-voltage signal (DYOVP) is inputted into the compare circuit, which converts the dynamic over-voltage signal (DYOVP) into a voltage compared with a reference voltage and outputs a over-voltage control signal (OVP), so as to achieve a dynamic over-voltage protection function.

Output over-voltage protection circuit for power factor correction

A high-voltage heavy-current drive circuit applied in a power factor corrector, comprising a current mirroring circuit (), a level shift circuit (), a high-voltage pre-modulation circuit (), a dead time control circuit () and a heavy-current output stage (); the heavy-current output stage adopts a Darlington output stage structure to increase the maximum operating frequency of the drive circuit. The stabilized breakdown voltage characteristic of a voltage stabilizing diode is utilized to ensure the drive circuit operating within a safe voltage range. Adding dead time control into the level shift circuit not only prevents the momentary heavy-current from a power supply to the ground during the level conversion process, but also reduces the static power consumption of the drive circuit.

High-voltage heavy-current drive circuit applied in power factor corrector

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Jiangsu, China

Xiaohui Ma