Patent ID: 8791648

Claim:
A light emitting diode (LED) circuit comprising: a plurality of LEDs; an output inductor coupled to the plurality of LEDs; an output transistor coupled to the output inductor; an LED driver circuit coupled to a gate of the output transistor, the LED driver circuit being configured to control switching of the output transistor, to detect an inductor current flowing through the output inductor, to switch OFF the output transistor in response to detecting the inductor current increasing to a peak value, and to switch ON the output transistor in response to detecting zero crossing of the inductor current; and a weak pull down circuit coupled to the gate of the output transistor, wherein the weak pull down circuit is configured to pull down the gate of the output transistor to ground along a first impedance path having an impedance that is higher than that of a second impedance path along which the gate of the output transistor is pulled down to ground when the output transistor is switched OFF by another transistor in the LED driver circuit.