Patent ID: 8339055
Filing Date: 2012-12-25
Classification: H02H,H02M,H05B

Abstract:
1. An inrush current limiter for use with an LED driver, wherein the LED driver includes an input current path comprising a full wave rectifier, a low pass filter, and a switching converter in which the LED driver converts an AC conductive angle modulated voltage to a DC output voltage, said inrush current limiter comprising: a current limiting device for coupling in the input current path of the LED driver, wherein said current limiting device limits input current to a predetermined maximum current level in response to the AC conductive angle modulated voltage; a switch device having a current path coupled in parallel with said current limiting device and having a control terminal; and a switch drive coupled to said control terminal of said switch device and for coupling to the switching converter, wherein said switch drive turns on said switch device to at least partially bypass said current limiting device as a voltage level of an input of the switching converter rises in response to the AC conductive angle modulated voltage.