Patent ID: 8193716

Claim:
A high-power light-emitting diode (LED) driving circuit, wherein an anode of a diode (D 1 ) is connected to a constant current direct current (DC) power supply; a cathode of the diode (D 1 ) is connected to anodes of (LED 1 ), (LED 4 ) and one end of resistors (R 1 ) and (R 2 ); (LED 1 ),(LED 2 ), and (LED 3 ) are connected in serial and then are connected to a collector of a transistor (Q 1 ); (LED 4 ), (LED 5 ), and (LED 6 ) are connected in serial and then are connected to a collector of a transistor (Q 2 ); emitters of the transistors (Q 1 ) and (Q 2 ) are grounded; a Zener diode (DZ 1 ) is connected to the (LED 1 ), (LED 2 ), and (LED 3 ) in parallel; a Zener diode (DZ 2 ) is connected to the (LED 4 ), (LED 5 ), and (LED 6 ) in parallel; the other end of the resistor (R 1 ) is respectively connected to a base of the transistor (Q 1 ) and one end of a capacitor (C 2 ); the other end of the capacitor (C 2 ) is connected to the collector of the transistor (Q 2 ); the other end of the resistor (R 2 ) is respectively connected to a base of the transistor (Q 2 ) and one end of a capacitor (C 1 ); and the other end of the capacitor (C 1 ) is connected to the collector of the transistor (Q 1 ).