Chicony Power Technology Co., Ltd.

Zhi-Hong Lu

Tzu-Hung Wang

Che-Hao Chang

Chiuan-Shing Wu

Wei-Yuan Chen

Hai-Wen Chang

Meng-Chi Yang

A power supply apparatus with a protection function includes a pulse width modulation control unit, a pulse width modulation detecting unit, a switch unit and a feedback circuit. The feedback circuit detects a bus voltage. When the feedback circuit detects that the bus voltage is greater than a predetermined voltage, the feedback circuit sends an informing signal to the pulse width modulation control unit. The pulse width modulation control unit adjusts a duty cycle of a pulse width modulation signal and sends the pulse width modulation signal to the pulse width modulation detecting unit. When the pulse width modulation detecting unit detects that the duty cycle of the pulse width modulation signal is less than a predetermined cycle, the pulse width modulation detecting unit turns off the switch unit to stop outputting power to avoid a reverse current phenomenon.

Power supply apparatus with protection function and redundant power supply system

A power supply apparatus includes a rectification circuit, a power factor correction circuit, an auxiliary boost circuit and a direct current to direct current conversion circuit. The auxiliary boost circuit includes an input contact, an output contact, a voltage detection unit, a control unit, a boost unit and a boost bypass unit. When a voltage value of a power factor correction power is not greater than a predetermined voltage value, the control unit is configured to turn off the boost bypass unit and turn on the boost unit, so that the boost unit boosts the power factor correction power and then the power factor correction power is sent to the direct current to direct current conversion circuit through the boost unit and the output contact.

Power supply apparatus with auxiliary boost circuit

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Taipei, Taiwan

Zhi-Hong Lu