Patent ID: 7821750

Claim:
A voltage converter, comprising: an electronic induction device; a switch device, electrically connected to the electronic induction device, for selectively establishing an electrical connection between the electronic induction device and a predetermined voltage level according to a first control signal received at a control node thereof; an over-current detection circuit, coupled to the electronic induction device, for performing an over-current detection and outputting an indication signal when detecting that a current passing through the switch device exceeds a predetermined current limit; a control circuit, for generating a second control signal; a driving circuit, coupled to the control circuit, the over-current detection circuit, and the control node of the switch device, for converting the second control signal into the first control signal, wherein the driving circuit is disabled when receiving the indication signal; and a protection circuit, coupled to the control node of the switch device, for selectively establishing an electrical connection between the control node of the switch device and the predetermined voltage level, wherein the protection circuit is enabled when receiving the indication signal.