The CN3762 is a PWM buck‑mode two‑cell lithium‑battery charger IC with 4 A charge current, adjustable voltage, UVLO, over‑voltage protection and status…
The CN3762 provides complete charge management for two series‑connected lithium cells. It operates in constant‑current, constant‑voltage and trickle‑charge modes, includes low‑voltage lockout, battery‑over‑voltage protection, and status‑indicator pins. The device is supplied in a 10‑pin SSOP package and supports a wide input range of 6.6 V to 30 V. Typical applications include handheld devices, backup batteries, portable industrial/medical instruments, power tools and standalone chargers. Key specifications such as a 4 A maximum charge current, 300 kHz PWM frequency and operation from –40 °C to 85 °C make it suitable for rugged portable systems. This manual is written in Chinese.
| Input voltage range | 6.6 V – 30 V |
|---|---|
| Maximum charge current | 4 A |
| Constant‑voltage setting (typical) | 8.4 V |
| UVLO threshold | 4 V – 6.5 V |
| Operating temperature range | –40 °C to 85 °C |
| PWM switching frequency | 300 kHz |
| Package | 10‑pin SSOP |
The typical constant‑voltage is 8.4 V, and it can be raised by adding an external resistor between the FB and BAT pins.
The device can deliver up to 4 A of charge current.
The CN3762 automatically enters sleep mode, shutting down its internal circuitry.