US Patent No. 10,602,577

CONTROL CIRCUIT, CONTROL METHOD AND SWITCHING POWER SUPPLY THEREOF


Patent No. 10,602,577
Issue Date March 24, 2020
Title Control Circuit, Control Method And Switching Power Supply Thereof
Inventorship Xiaoping Chen, Hangzhou (CN)
Assignee Silergy Semiconductor Technology (Hangzhou) LTD, Hangzhou (CN)

Claim of US Patent No. 10,602,577

1. A control circuit for generating a switching control signal to control switching operations of a power switch in a power stage circuit, the control circuit comprising:a) a first control loop configured to receive a first voltage feedback signal, and to generate a first compensation signal;
b) a voltage regulating circuit configured to receive an output voltage signal of said power stage circuit, and to generate a second compensation signal according to a difference in said output voltage signal at a transition between a first and a second operating time period of said power stage circuit and during said second operating time period, wherein no current is provided to a load of said power stage circuit during said second operating time period; and
c) a control and driving circuit configured to receive said first and second compensation signals and a first sense voltage signal that represents a current through an inductor of said power stage circuit, and to generate said switching control signal comprising comparing said first compensation signal against said first sense voltage signal when in said first operating time period, and comparing said second compensation signal against said first sense voltage signal when in said second operating time period.