JL091D is a high-integration and high-performance dedicated control chip for electronic cigarette lighters. Unlike previous MCU solutions, this chip adopts ASIC design and will not crash, nor will it occur due to lower than critical voltage. The phenomenon that the chip cannot be reset is caused. The IC integrates a MOS tube and a voltage regulator tube, which is easy to manufacture, has low power loss, and has very few peripheral components. Only one LED light and one capacitor are required, and the system cost is low. The functional module of this circuit consists of reference source BG, bias current I_BIAS, oscillator OSC, low voltage detection circuit, digital logic control circuit, LED indicator drive circuit, built-in power tube drive and charging module.

2. Basic features:

1) The quiescent working current is less than 5uA, and the current of the atomizer is greater than 3A during operation.

2) The key trigger mode is integrated inside the chip, which is convenient for application.

3) High-quality charging function, automatic switching of trickle charging, constant current charging and constant voltage charging during the charging process to ensure the safety of the battery during the charging process. overcharged  protection, low-voltage trickle charging, and visual LED work indication. The charging voltage detection error is within 1%.

4) Comprehensive protection module

◇The chip integrates an under-voltage protection module (UVLO), which is used to detect the supply voltage of the battery of the system. When the working voltage is lower than 3V, the UVLO output  The enable is valid; the short circuit protection module (SCP) is used to indicate that the output is cut off when the load resistance of the atomizing wire is less than 0.8 Ohm; the over temperature protection module Block (OTP), used to control the operating temperature of the system, prevent the system from overheating, and reduce the life of the chip.

◇When the lithium battery charging voltage is less than 2.7V, it is trickle charging, which can ensure that the battery is not damaged and ensure safety; when charging above 2.7V, start high-current charging, and As the voltage approaches 4.2V, the charging current gradually decreases.

5) Independent charging port, support charging and discharging.

6) Available in SOP-8 package.