Innovision Semiconductor Inc.

Xuening Li

Feng Han

Brian Carpenter

Wanke Tao

Large semiconductor ICs provide the processing power for billions of electronic devices used in every facet of modern life. Multiphase converters are the most common means of providing the current required for these CPUs, GPUs, and ASICs. Contemporary designs require 8, 12, 16, and even higher phase counts. Existing designs require each phase provide an independent current feedback line to the multiphase controller for current sharing purposes; this drastically increases the pin count of the controller and creates congestion in PCB routing. Our new idea moves the current sharing function to the power stage element, thereby reducing the cost of the controller and the complexity of the PCB.

Low I/O current sharing architecture for multiphase DC-DC converters

A gate drive circuit for a power semiconductor device, a low-side switching circuit, a high-side switching circuit, and a drive method are disclosed. When a first gate driver receives a control signal which is at a first level, the first gate driver connects a first gate to a first voltage, so that the first gate controls a channel region. When the transistor operates on a Miller plateau, the area of an overlapping region between the first gate and a drain inside the transistor is relatively small, so the Miller capacitance of the transistor is relatively small, thereby improving the switching speed of the transistor. A second gate is connected to a second voltage after a first duration, so that the second gate controls a drift region of the transistor to form an accumulation layer, and the accumulation layer has a relatively high carrier concentration.

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DONGGUAN, China

Xuening Li