Monolithic Power Systems, Inc.

Chengdu Monolithic Power Systems Co., Ltd.

Wei Mao

Zhengwei Zhang

Tianzhu Zhang

Da Chen

Switching mode power supply (SMPS) having a switch circuit and a controller. The switch circuit has an output inductor and a switch with a minimum on time. A control signal is generated by the controller to control the switching operation of the switch based on a clock signal with a switching frequency and an off signal. When the required on time of the switch is smaller than the minimum on time, the SMPS reduces the switching frequency adaptively and the actual on time of the switch is controlled to be the minimum on time.

Switching mode power supply with adaptive frequency

The present invention discloses an analog switching circuit having a first terminal receiving an input signal, a second terminal providing an output signal and a control terminal receiving a switching control signal. The analog switching circuit has a first logic circuit providing a first control signal and a second control signal based on the switching control signal; an NMOS and a PMOS coupled between the first terminal and the second terminal, and controlled by the first control signal and the second control signal respectively; a first control circuit controls the backgate voltage of the NMOS based on the input signal and the switching control signal; and a second control circuit controls the backgate voltage of the PMOS based on the input signal and the switching control signal.

Growing community of inventors

Chengdu, China

Wei Mao