CONTROL CIRCUIT AND CONTROL METHOD

WIPO Patent Application WO/2024/087878

A1

A control circuit and a control method, which relate to the technical field of circuits. The circuit comprises: a gallium nitride power device, a detection module (10), a first unidirectional conducting device, a first sampling module (20) and a control current source (31), wherein a first input end of the control current source (31) is connected to a gate source current, and an output end of the control current source (31) is connected to a gate of the gallium nitride power device; a drain of the gallium nitride power device is connected to a power supply, and a source of the gallium nitride power device is connected to a load; an input end of the detection module (10) is connected to the load (40), and an output end of the detection module (10) is connected to a cathode of the first unidirectional conducting device; an anode of the first unidirectional conducting device is connected to a control current source (31), and the gate and source of the gallium nitride power device; the first sampling module (20) is connected between the control current source (31) and the first unidirectional conducting device; and a second input end of the control current source (31) is connected to an output end of the first sampling module (20). Therefore, the precision of closed-loop control is improved, and the precise closed-loop control over a load (40) is realized.

CAI BO (CN)
QING JIAN (CN)
ZHANG LI (CN)

PCT/CN2023/116227

May 02, 2024

August 31, 2023

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CHENGDU CONVENIENTPOWER SEMICONDUCTOR CO LTD (CN)

H03K17/16

CHOFN INTELLECTUAL PROPERTY (CN)

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