Lite-on Technology Corporation

Te-Hung Yu

Yu-Cheng Lin

Chia-Hui Liang

Min-Hao Hsu

A power supply circuit is provided. The power factor correction (PFC) circuit is used to perform a power factor correction according to a first voltage to generate an intermediate voltage. The first storage capacitor is used to store a first electrical energy related to the intermediate voltage. The boost conversion circuit is connected to the PFC circuit and used to generate an output voltage according to the intermediate voltage. The boost conversion circuit includes a first post-stage inductor, a first post-stage diode and a first post-stage transistor. The second storage capacitor is used to store a second electrical energy related to the output voltage. The capacitance value of the second storage capacitor is less than the capacitance value of the first storage capacitor; the first electrical energy is completely or partially transferred as the second electrical energy.

Boost power supply circuit

A power factor correction circuit includes a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a sixth switch, a seventh switch, a first inductance coil, a second inductance coil, a first capacitor, and a second capacitor. The first switch is connected to the second switch, the third switch, and the first inductance coil. The fifth switch is connected to the third switch and the second inductance coil. The sixth switch is connected to the first switch, the fourth switch, and the seventh switch. The seventh switch is further connected to the second switch, the first capacitor, and the second capacitor. The second inductance coil is further connected to the fourth switch and the first capacitor. The second capacitor is connected to the fourth switch, the sixth switch, and the first switch.

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Taipei, Taiwan

Te-Hung Yu