Patent ID: 7482799

Claim:
A high-voltage detecting circuit applied in a power supply, comprising: a high-voltage detecting module detecting a high-voltage power source and comprising a terminal; a switch module having a first terminal electrically connected with said high-voltage power source, a second terminal electrically connected with said terminal of said high-voltage detecting module, a control terminal, and a p-type transistor disposed between said first and said second terminals of said switch module; and a control module having a first terminal electrically connected with said control terminal of said switch module, a second terminal electrically grounded, and an n-type transistor controlling an on-off status of said p-type transistor, wherein: said n-type transistor has a first terminal, a second terminal electrically grounded, and a control terminal receiving a high/low-level signal; and said control terminal of said n-type transistor receives said low-level signal and said control module shuts off said switch module when said power supply is staying in a standby mode so as to eliminate both a power consumed by said high-voltage detecting module and a power consumed by said low-level signal at said standby mode.