The invention discloses an
electronic cigarette lighter for an automobile. The
electronic cigarette lighter comprises a cigarette lighting head and a cigarette lighting and charging
multiplex circuit. The cigarette lighting head is provided with a
metal block. The cigarette lighting and charging
multiplex circuit comprises an LC
resonance circuit, a synchronous rectification Buck-Boost circuit, a
USB interface, a first switching circuit, a second switching circuit, an output current sampling circuit, a limited current sampling circuit and a master
control circuit. The master
control circuit is used for selectively enabling one of the first switching circuit and the second switching circuit to be connected. When the first switching circuit is connected, an
induction heating coil of the LC
resonance circuit is made to generate an alternating
magnetic field, so that vortex is generated in the
metal block to heat the
metal block. When the second switching circuit is connected, the charging mode of equipment to be charged can be recognized, and the synchronous rectification Buck-Boost circuit is controlled to output charging
voltage and charging current corresponding to the recognized charging mode. According to the
electronic cigarette lighter, the cigarette lighting and charging functions can be achieved at the same time, the
multiplex degree of the circuit is high, and the manufacturing cost of the electronic cigarette lighter is low.