Active-semi, Inc.

Tung Van Nguyen

Khanh Quang Dinh

Hue Khac Trinh

Thuc Huu Lam

Hiroshi Watanabe

An integrated circuit (IC) comprises a regulator circuit, a bootstrap control circuit, and a gate driver that drives a transistor pair in buck or boost mode to switch current through an inductor. The IC has a VIN terminal coupled to receive a voltage generated from an AC power source, a STR terminal coupled to receive a voltage from a stored power source (e.g., a capacitor bank), and a HSB terminal that is capacitively coupled to the inductor. When bucking or boosting, the regulator circuit generates VDD supply voltage from the stored power source, supplies the VDD supply voltage onto the bootstrap control circuit, and the bootstrap control circuit generates a gate driver supply voltage that is supplied to the gate driver circuit. When not bucking or boosting, voltage on the HSB terminal is maintained between a voltage threshold from the AC power source without draining the stored power source.

Optimized gate driver for low voltage power loss protection system

An integrated circuit includes a voltage set input terminal, a current source, a voltage clipping circuit, and a voltage regulator. The clipping circuit receives a voltage from the terminal and supplies a voltage onto a reference voltage input of the regulator. The magnitude of an output voltage VOUT output by the regulator is the voltage on reference voltage input multiplied by the voltage gain of the regulator. The user sets VOUT by attaching an external resistor to the terminal. Current from the current source flows out of the terminal, and through the external resistor, thereby setting the voltage on the terminal. If the voltage on the terminal is between Vand V, then VOUT is a fixed multiple of the voltage. If the voltage is less than V, then VOUT is a predetermined VOUTMIN value. If the voltage is greater than V, then VOUT is a predetermined VOUTMAX value.

Growing community of inventors

Nam Dinh Province, Vietnam

Tung Van Nguyen