Tung & Associates
Power supply circuit with PFC function, and automatic gain control circuit therefor and control method thereof
The present invention discloses a power supply circuit with power factor correction (PFC) function, and an automatic gain control circuit therefor and a control method thereof. The power supply circuit includes the automatic gain control circuit and a load driver circuit. The automatic gain control circuit converts an input voltage to a regulation voltage, and the load driver circuit generates an output current according to the regulation voltage. The automatic gain control circuit automatically adjust the regulation voltage such that the regulation voltage has a substantially fixed amplitude or fixed average value under different input voltages of different specifications, and the output current provided by the load driver circuit varies in phase with the input voltage to provide a PFC function.
RICHTEK TECHNOLOGY CORPORATION, R.O.C.
Y H H H H G H
Y02B H02M H02M H02M H02M G05F H02M
additional inventional inventional inventional additional inventional inventional
Jing-Meng Chia-Wei
Liu Liao