Title:
PROTECTIVE CIRCUIT FOR GAN POWER DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/136221
Kind Code:
A1
Abstract:
A protective circuit for a GaN power device, comprising a negative voltage generation unit, a gate voltage switching unit and a drain voltage switching unit. A negative voltage conversion sub-unit is used to convert a power supply into a gate protection voltage. A negative voltage comparison sub-unit is used for outputting a drain voltage turn-off signal when the amplitude of the gate protection voltage is lower than a preset amplitude. A push-pull circuit sub-unit of the drain voltage switching unit is separately connected to the output end and common end of the negative voltage comparison sub-unit, the drain of the GaN power device, and the power supply of the drain of the GaN power device. The push-pull circuit sub-unit is used for turning on the drain and common end of the GaN power device according to the drain voltage turn-off signal.
Inventors:
LEI WENPING (CN)
ZHANG JINGJING (CN)
YU LIGUANG (CN)
GAO HENG (CN)
ZHANG JINGJING (CN)
YU LIGUANG (CN)
GAO HENG (CN)
Application Number:
PCT/CN2020/140519
Publication Date:
July 08, 2021
Filing Date:
December 29, 2020
Export Citation:
Assignee:
SUNWAVE COMM CO LTD (CN)
International Classes:
H02H7/20
Foreign References:
| CN111146770A | 2020-05-12 | |||
| CN109768789A | 2019-05-17 | |||
| CN109768789A | 2019-05-17 | |||
| CN109462388A | 2019-03-12 | |||
| CN109462388A | 2019-03-12 | |||
| CN107528553A | 2017-12-29 | |||
| CN207070035U | 2018-03-02 | |||
| US20190140630A1 | 2019-05-09 |
Attorney, Agent or Firm:
HANGZHOU HUAJIN LIANZHE INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
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