CN3767

The CN3767 is a 16-pin PWM buck battery charge controller IC. Key functions include:
- Input Voltage Range: 4.5V to 28V
- Charging Current: Up to 4A (adjustable)
- Supported Battery Types: 1- to 6-cell Li-ion/LiFePO4 or 2- to 18-cell NiMH/NiCd
- Features:
- Constant current/constant voltage (CC/CV) charging
- Automatic recharge
- Charge status indication
- Thermal regulation
- External N-MOSFET drive
Pin Functions (Selected Key Pins):
- VIN (Pin 1): Power input
- GND (Pin 8): Ground
- BAT (Pin 4): Battery connection
- PROG (Pin 5): Charging current programming
- STAT (Pin 6): Charge status output
Compact and efficient, it’s ideal for portable charging applications.

The CN3767 is a versatile 4A solar charge controller IC with applications in:
1. Solar Power Systems – Charging lithium-ion, lead-acid, and LiFePO4 batteries in off-grid solar setups.
2. Portable Solar Devices – Powering solar chargers, solar lights, and small solar panels.
3. Energy Storage – Managing battery charging in solar street lights, energy storage systems, and backup power.
4. Industrial & IoT – Supporting renewable energy solutions for remote sensors, telemetry, and industrial equipment.
It features MPPT (optional), overcharge protection, and wide input voltage (4.5V–28V), making it ideal for efficient solar energy management.

The CN3767 is available in a SOP-16 (Small Outline Package with 16 pins) package type. This surface-mount package is compact and suitable for various battery charging applications. Its small size and efficient thermal performance make it ideal for space-constrained designs.