Patent ID: 9444325
Filing Date: 2016-09-13
CPC Classification: H02M,Y02B

Claim Text:
1. A switching regulator compatible with an electronic transformer, configured to operably convert a rectified input voltage to an output voltage, wherein the rectified input voltage is generated by an electronic rectifier circuit which includes the electronic transformer and a rectifier circuit coupled to each other, the switching regulator comprising: a power stage circuit, configured to operably switch at least one power switch therein according to an operation signal to convert the rectified input voltage to the output voltage, and to control an input current flowing from the electronic rectifier circuit to the switching regulator; a control circuit, which is coupled to the power stage circuit, and configured to operably generate the operation signal according to a feedback signal and an input current peak and valley setting (P&Vset) signal; and an input current peak and valley setting circuit, which is coupled to the control circuit, and configured to operably generate the P&Vset signal, wherein the input current has plural peaks and plural valleys in one cycle period, wherein the plural valleys form a semi-sinusoidal contour, and the plural peaks form a semi-sinusoidal contour wherein the power switch is kept ON at the beginning and/or the end of the cycle period, such that the plural peaks of the input current are higher than a minimum load current of the electronic transformer.