JPS61184332U

JPS61184332U -

Info

Publication number: JPS61184332U
Application number: JP6736885U
Authority: JP
Priority date: 1985-05-09
Filing date: 1985-05-09
Publication date: 1986-11-17

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例の回路図、第２図
は上記実施例の動作を説明する電圧特性図、第３
図は上記実施例の第２比較回路の比較電圧発生部
の回路構成図、第４図は上記比較電圧発生部の電
圧特性図、第５図は従来例の比較電圧特性図であ
る。１０１……パワーＭＯＳトランジスタ、１０２
……負荷、１０３……第１比較回路、１０５……
第２比較回路、１０７……ＡＮＤゲート、１０８
……第２ＭＯＳトランジスタ。 Fig. 1 is a circuit diagram of one embodiment of this invention, Fig. 2 is a voltage characteristic diagram explaining the operation of the above embodiment, and Fig. 3 is a voltage characteristic diagram illustrating the operation of the above embodiment.
FIG. 4 is a circuit configuration diagram of the comparison voltage generation section of the second comparison circuit of the above embodiment, FIG. 4 is a voltage characteristic diagram of the comparison voltage generation section, and FIG. 5 is a comparison voltage characteristic diagram of the conventional example. 101...Power MOS transistor, 102
...Load, 103...First comparison circuit, 105...
Second comparison circuit, 107...AND gate, 108
...Second MOS transistor.

Claims

[Scope of utility model registration request]

a power MOS transistor connected in series with a load to switch the current flowing through the load; a first detection circuit that detects that the gate voltage of the power MOS transistor has reached a first voltage; and the power MOS transistor. a second detection circuit that detects that the voltage at the connection point between and the load has reached a second voltage; and the AND condition of the detection output of the first detection circuit and the detection output of the second detection circuit. 1. A semiconductor switch circuit comprising switching means for turning off a power MOS transistor.