Patent ID: 11937649
Assignee: HUIZHOU HAPPY VAPING TECHNOLOGY LIMITED
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC A  G  H  Y | IPC A  G  H

Claim 4:
5. The constant-power electronic cigarette protecting against dry-heating according to claim 4, wherein the constant-power output control unit and the resistance detection unit are connected with each other, and the resistance detection unit comprises a first MOSFET having 8 pins, wherein a third pin of the first MOSFET serves as a gate, a fourth pin and a fifth pin are connected with each other and serve as a source, a first pin, a second pin, a sixth pin, a seventh pin, and an eighth pin are connected with each other and serve as a drain, the third pin of the first MOSFET serves as a control signal input terminal, the source of the first MOSFET are connected with the third pin by a resistor R1, wherein the resistance detection unit further comprises resistors R5, R3, R11, R24 and capacitors C1, C2, the drain of the first MOSFET is connected in series with resistors R11, R24 and then is grounded, the resistor R24 is connected in parallel across the capacitor C1, the resistor R11 and the resistor R24 are connected with each other at a resistance detection signal output terminal, the drain of the first MOSFET is further connected in series with the resistors R5, R3 and the capacitor C2 and then is grounded, the resistor R3 and the capacitor C2 are connected with each other at an auxiliary resistance detection signal terminal, wherein the constant-power output control unit comprises a second MOSFET having 8 pins, wherein a third pin of the second MOSFET serves as a gate, a fourth pin and a fifth pin are connected with each other and serve as a source, a first pin, a second pin, a sixth pin, a seventh pin, and an eighth pin serve as a drain and are connected with each other to serve as a PWM voltage output terminal, the third pin of the second MOSFET serves as a control signal input terminal of the constant-power control unit, the fourth pin and the fifth pin of the second MOSFET are connected with a positive electrode of the battery, the resistor R7 is connected in series between the third pin and the fourth and fifth pins of the second MOSFET, and further the fourth pin and the fifth pin of the first MOSFET are connected with the fourth pin and the fifth pin of the second MOSFET, and a joint between the resistor R5 and the resistor R3 is connected with the PWM voltage output terminal.