Disposable E-Cigarettes - Shenzhen RIMYI Technology Co., Ltd.

Disposable Solution 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

Product overview

This is an electronic cigarette circuit board that triggers smoking with an airflow sensor and has adjustable power. It mainly consists of the following circuit modules: MCU control module, power output module, digital display, charging management module, and lithium battery control module. It can detect smoking actions and control output through MCU, and display smoking status through digital display.

Functional Highlights

MEMS airflow sensor: The microphone airflow sensor detects changes in air pressure and identifies user smoking behavior.
Signal processing: The airflow changes captured by the sensor will be converted into capacitance change signals, which will be processed by the ASIC chip and transmitted to the MCU control module for output control.
Protection function: This PCBA solution board has multiple protection functions to ensure user safety during use, including lithium battery protection function, smoking timeout protection, over temperature protection, short circuit protection, and low battery protection.
Module form: SMT packaging is used to form a module form, which allows it to be directly soldered onto the circuit, making it very suitable for PCBA integration, thereby reducing assembly costs and improving production efficiency.

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 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 adjustable
	The circuit has three working modes: charging mode, normal working mode, and power-saving mode;
	In power-saving mode: static current<10 μ A;
	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;