Patent ID: 7903437
Filing Date: 2011-03-08
Classification: H02M

Abstract:
1. A frequency-changing voltage regulation circuit, which applies to a power supply device that has a booster unit and a power conversion unit and is coupled to a power source to obtain an input power, wherein said booster unit has a boost control circuit and operates in a continuous current mode, and wherein said boost control circuit modulates said input power according to a reference frequency to convert said input power into a boosted power, and wherein said boost control circuit is coupled to said frequency-changing voltage regulation circuit, and wherein said frequency-changing voltage regulation circuit comprises: a voltage detection circuit, detecting said input power sent to said booster unit and generating an input level signal according to the value of said input power; and a frequency setting circuit, generating a reference frequency signal corresponding to said input level signal and sending said reference frequency signal to said boost control circuit to modulate the frequency that said booster unit performs power conversion.