Patent ID: 7835126
Filing Date: 2010-11-16
Classification: H02H

Abstract:
1. A short-circuit protection circuit, comprising: a first transistor having a first terminal for receiving power provided by a power source, a second terminal for outputting power to a load, and a control input; a second transistor having a first terminal connected to the control input of the first transistor, a second terminal and a control input connected to the second terminal of the first transistor; a third transistor having a first terminal connected to the second terminal of the second transistor, a second terminal connected to a ground, and a control input for receiving an enable signal for resetting the short-circuit protection circuit when toggled for a predetermined period of time after a short-circuit condition occurs on the load; a first resistor connected between the first terminal and the control input of the first transistor; a second resistor connected between the first and second terminals of the second transistor; and a capacitor connected between the first and second terminals of the second transistor, the predetermined period of time based on a time constant based on a resistor value of the second resistor and a capacitor value of the capacitor.