Patent ID: 8502516
Filing Date: 2013-08-06
Classification: H02M,Y02B

Abstract:
1. A voltage regulation module coupled to a power conversion module to form a closed loop, the power conversion module including a PWM circuit and a conversion circuit, the conversion circuit including a first power switch and a second power switch coupled in series, the PWM circuit outputting a drive signal to control the first power switch and the second power switch to turn on and off to cause the conversion circuit to generate an output current, said voltage regulation module comprising: a subtraction circuit for obtaining a voltage that is related to the output current of the power conversion module, said subtraction circuit performing a subtraction operation on the voltage related to the output current and a reference voltage to generate a second regulation voltage; a regulation circuit coupled to said subtraction circuit, said regulation circuit generating a level voltage according to the second regulation voltage, the level voltage being directly proportional to the output current, the PWM circuit adjusting a voltage level of the drive signal according to the level voltage, the voltage level of the drive signal following changes in the output current; and an amplifier circuit coupled between the power conversion module and said subtraction circuit, said amplifier circuit obtaining sampling voltages which are related to the output current of the power conversion module, and amplifying the sampling voltages by a predetermined ratio to generate a first regulation voltage, said subtraction circuit performing the subtraction operation on the first regulation voltage and the reference voltage to generate the second regulation voltage.