Patent ID: 9343901
Filing Date: 2016-05-17
CPC Classification: G05F,H02H

Claim Text:
1. A short-circuit protection circuit adapted to a voltage regulator module that regulates a power input from a power supply and supply power to a load, the voltage regulator module includes a high side transistor and a low side transistor, the short-circuit protection circuit comprising: a short-circuit detecting circuit including a detecting terminal coupled with an end of the high side transistor, and another end of the high side transistor is connected with an end of the low side transistor and coupled with the load, and another end of the low side transistor is coupled with a ground; a first switch connected with the low side transistor in parallel; and a second switch coupled between the high side transistor and the power supply, wherein the first switch is conducted before the power supply is powered on, the short-circuit detecting circuit sends a detecting voltage to the high side transistor via the detecting terminal and determines whether the detecting voltage is grounded and whether the high side transistor is short-circuited, and then the short-circuit protection circuit selectively turns off the second switch to isolate the power supply.