US Patent No. 10,462,860

CONTROLLER FOR SWITCHING REGULATOR, SWITCHING REGULATOR AND LED LIGHTING SYSTEM


Patent No. 10,462,860
Issue Date October 29, 2019
Title Controller For Switching Regulator, Switching Regulator And Led Lighting System
Inventorship Tung-Ming Yu, Chiayi (TW)
Assignee ELITE SEMICONDUCTOR MEMORY TECHNOLOGY INC., Hsinchu (TW)

Claim of US Patent No. 10,462,860

1. A controller for a switching regulator of a LED lighting system, comprising:a current monitor, used to sense a LED current passing through a current sensing resistor of the switching regulator, and to generate a sensing current; and
a voltage divider, connected to the current monitor, used to receive the sensing current to generate a first through third divided voltages, wherein the first divided voltage is larger than the second divided voltage, and the second divided voltage is larger than the third divided voltage;
an integration circuit, connected to the voltage divider, used to compare the second divided voltage with a reference voltage, and to generate an integration voltage across a RC circuit thereof accordingly; and
a comparator circuit, connected to the integration circuit and the voltage divider, used to compare the integration voltage with the first divided voltage and the third divided voltage, and to generate a driving signal.