Johnson & Johnson Consumer Inc.

Umeheal Ltd.

Texas Instruments Corporation

Xufeng Wu

Justin E McDonough

Rui Lin

Lai Hing Vair

Litong Wang

Wei Zhao

Jianzhang Xie

Yueming Sun

Yihan Yao

A device includes a first FET coupled between first and drive terminals, and is configured to turn on/off responsive to a PWM signal having a first/second state, respectively. A second FET is coupled between the first and drive terminals and is configured to turn on responsive to the PWM signal having the first state, and turn off responsive to expiration of a particular delay after the second FET turns on. A third FET is coupled between drive and second terminals, and is configured to turn on/off responsive to the PWM signal having the second/first state, respectively. A fourth FET is coupled between the drive and second terminals, and is configured to turn on responsive to the PWM signal having the second state if a switching terminal has a first voltage, and turn off responsive to the PWM signal having the first state or the switching terminal having a second voltage.

Gate driver for DC-DC converters

A system includes an input voltage node configured to provide an input voltage (VIN). The system also includes a load (R) and a switching converter coupled between the input voltage node and the load (R). The switching converter is configured to provide an output voltage (VOUT) to the load (R) based on the input voltage (VIN). The switching converter includes gate driver circuitry and a current mode control circuit coupled to the gate driver circuitry. The current mode control circuit is configured to output control signals to the gate driver circuitry in accordance with different modes of operation, wherein the current mode control circuit is configured to adjust a threshold (I*) used to switch between a discontinuous conduction mode (DCM) and a power save mode (PSM).

Adjustable power save mode threshold for switching converter

TENS or EMS device

Electrode pad for TENS or EMS device

Growing community of inventors

Shanghai, China

Xufeng Wu