Patent ID: 9160233
Filing Date: 2015-10-13
Classification: H02M

Abstract:
1. A controller for controlling a power converter to output constant power, the controller comprising: a current sensing module coupled to a secondary side of the power converter for generating a sensing current according to an output current flowing through the secondary side of the power converter; a voltage generation module coupled to the current sensing module for generating a set voltage corresponding to a reciprocal of the sensing current according to the sensing current; and a voltage regulation module coupled to the voltage generation module and the secondary side of the power converter for generating a regulation voltage to a feedback circuit of the secondary side of the power converter according to the set voltage and a sensing voltage corresponding to an output voltage of the secondary side of the power converter, wherein the feedback circuit and a primary side of the power converter regulate the output voltage according to the regulation voltage; wherein a product of the output voltage and the output current is a constant value.