中圖分類號： TN386；TM133
文獻標識碼： A
DOI：10.16157/j.issn.0258-7998.212421
中文引用格式： 劉紅奎. 基于電壓比較器的固態(tài)功率控制器驅動保護電路研究[J].電子技術應用，2022，48(8)：127-130.
英文引用格式： Liu Hongkui. Research on driver protection circuit of solid state power controller based on voltage comparator[J]. Application of Electronic Technique，2022，48(8)：127-130.

Research on driver protection circuit of solid state power controller based on voltage comparator

Abstract： This paper analyzed the principle of driver protection technology of solid state power controller based on voltage comparator, and the protection circuit of decreasing gate-voltage was designed. The protection circuit of decreasing gate-voltage by setting output voltage value and voltage rise/fall speed, realized the MOSFET gate voltage control, and the load in over-current or short-circuit protection function. The proposed method solved the existing problem using voltage regulator diode to judge the over-current threshold voltage, which lead to the control precision of MOSFET gate voltage is not high and protected MOSFET repeatedly open/close within a time delay. The analysis and simulation on the circuit has been made, and the results show that the protection circuit of decreasing gate-voltage can protect short-circuit load within 45 μs.

Key words : SSPC；decreasing gate-voltage；voltage comparator；short-circuit protection