Disposable E-Cigarette Circuit Board

3-Wire MEMS Mic, Load 0.6~3.0Ω, Negative Pressure -150±50Pa E-Cig Circuit Board

Model: RMY002
Size: 34.5×22.0mm
Low Power: Quiescent Current <15μA
Adjustable Voltage Output
Short Circuit Protection, 10s Over-Inhalation, Over Temperature Protection, Low Voltage Protection
Digital Tube Display

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Smart Disposable E-Cigarette Circuit Board with Airflow Sensor

This disposable e-cigarette circuit board uses an airflow sensor to trigger smoking and supports adjustable power output. It integrates an MCU control module, power output, digital display, charging management, and lithium battery control. The airflow sensor detects each puff and signals the MCU to control power output precisely. The digital display shows real-time smoking status, helping users track usage clearly and efficiently.

Functional Highlights

MEMS airflow sensor: The microphone airflow sensor detects changes in air pressure and identifies user smoking behavior.
Signal processing: The sensor captures airflow changes and converts them into capacitance change signals. The ASIC chip processes these signals and sends them to the MCU control module for output control. This process ensures the efficient operation of the disposable e-cigarette circuit board.
Protection function: This disposable e-cigarette circuit board includes multiple protection features to ensure user safety. It provides lithium battery protection, smoking timeout protection, over-temperature protection, short circuit protection, and low battery protection. These safety functions work together to deliver a secure and reliable vaping experience.
Disposable E-Cigarette Circuit Board Module: The disposable e-cigarette circuit board uses SMT packaging for module formation. This allows direct soldering onto the circuit, ideal for PCBA integration. The result is reduced assembly costs and improved production efficiency.

Disposable E-Cigarette Circuit Board Parameters

Absolute Maximum Ratings	Parameter	Symbol	Value	Unit
	Supply Voltage (VDD)	VDD	-0.3~6.25	V
	Charging Voltage (VCC)	VCC	-0.3~6.5	V
	AT Output Current	IAT	9	A
	Output Load	Rload	0.6	Ω

Performance Parameters	Symbol	Parameter	Conditions	Min	Typ	Max	Unit
	P	Operating Air Pressure		-100	-150	-200	Pa
	VDD	working voltage		3.2		4.2	V
	Vuvlo	Low voltage detection threshold	VDD from high to low	2.9	3	3.1	V
	Iq	static current	Power saving mode		5	10	uA
	Rdson	Switching tube conduction impedance	Power saving mode		15	25	mΩ
	Iled	LED output current		–	–	–	mA
	RS	Short circuit protection threshold			0.4		Ω
	VAT	Constant average voltage output	VDD=4.2V, Output empty load		3.8		V
	Rload	Output load			0.6	3	Ω
	Dmin	Minimum conduction duty cycle	VDD=4.2V		90		%
	TSMOKE	Smoking timeout			10		S
	VCC	Charging input voltage		4.75		6.5	V
	VFLOAD	Floating charging threshold voltage	four point one eight	4.2	4.22		V
	VTRKL	Drip flow, constant flow	VDD from low to high	2.95	3	3.05	V
	ICH	Charging current	VCC=5V		550		mA
	ITRIKL	trickle charge current	VCC=5V		55		mA
	TSD	Overheating protection threshold			85		℃

LED/Display Status	working condition	Digital tube display
	Battery power on self-test	The display screen is fully lit for 3 seconds
	Normal triggering of cigarette lighting	The screen displays the scrolling effect, fuel and electricity indicators, and the logarithm
	Smoking normally	The screen displays the scrolling effect, fuel and electricity indicators, and the logarithm
	Normal end of cigarette lighting	–
	Smoking timeout	The fuel and electricity indicator flashes 5 times
	Overcurrent or short circuit protection	Blink full screen 3 times
	Battery undervoltage before smoking	The lightning symbol flashes 10 times
	Battery undervoltage after cigarette lighting	The lightning symbol flashes 10 times
	Normal charging	The single digit of the battery level, the lightning symbol, and the percent sign flash, and the outer circle of the battery level lights up with the corresponding color based on the percentage of battery level
	Battery fully charged	The fully charged screen displays 100%, and the lightning symbol is constantly on
	Release charging (charger removed)	Pull out the charger, and the screen will light up for 4 seconds

Product Features	Use buttons to adjust output, power and adjustability
	The circuit has three working modes: charging mode, normal working mode, and power-saving mode.
	In power-saving mode: static current<10 μA;
	Working voltage: 2.1V~5.0V;
	Supports wide voltage charging (4.5~6.5V); Equipped with OVP overvoltage protection
	Contains protection functions such as overheating (OTP), undervoltage (UVLO), short circuit (SCP), etc.
	Multiple digital display functions;