CN3762-Two-cell lithium battery charging management integrated circuit

Compatible with CN3763-three-cell lithium battery charging. (replace the chip)

 Wide input voltage range: 6.6V to 30V  Complete charge management for two lithium batteries  Charging current up to 4A  PWM switching frequency: 300KHz  Constant voltage charging voltage can be adjusted upward with a resistor  Constant voltage charging voltage accuracy: ±1 %  Constant charging current is set by an external resistor  Trickle charge for deeply discharged batteries  Automatic recharge function  Charging status and charging end status indication  Soft start function  Battery terminal overvoltage protection  Working environment temperature: -40 ℃ to +85℃  Adopts 10-pin SSOP package

CN3762 is a PWM step-down mode two-cell lithium battery charge management integrated circuit that independently manages the charging of two lithium batteries. It has the advantages of small package size, few peripheral components and simple use. CN3762 features trickle, constant current and constant voltage charging modes, making it ideal for lithium battery charge management. In constant voltage charging mode, CN3762 modulates the battery voltage at 8.4V, which can also be adjusted upward through an external resistor; in constant current charging mode, the charging current is set through an external resistor. For deeply discharged lithium batteries, when the battery voltage is lower than 66.5% (typical value) of the constant voltage charging voltage, CN3762 uses 17.5% of the set constant current charging current to trickle charge the battery. During the constant voltage charging stage, the charging current gradually decreases. When the charging current drops to 16% of the constant current charging current, charging ends. At the end of charging, if the battery voltage drops to 95.5% of the constant voltage charging voltage, a new charging cycle will automatically start. When the input power fails or the input voltage is lower than the battery voltage, CN3762 automatically enters sleep mode. Other functions include input low voltage latch, battery terminal overvoltage protection and charging status indication. CN3762 is available in 10-pin SSOP package.