LY4176E

Single-cell Li-ion linear battery charger IC with integrated OVP, supporting input voltage up to 30V, overvoltage protection threshold of 6.1V, and configurable maximum charge current up to 1A. Features a complete charge cycle including trickle, constant current, and constant voltage phases, with integrated reverse-current blocking — no external isolation diode required. An integrated intelligent thermal regulation function automatically adjusts the charge current at elevated temperatures to limit die temperature under high-power or high-temperature conditions. The NTC function monitors battery temperature and suspends charging when the battery temperature exceeds or falls below the configured safe operating temperature range, extending battery life and ensuring safe operation of the Li-ion battery.

Applications

• Portable devices such as small speakers
• Small fans
• Bluetooth earphones
• Power banks
• Wearable electronics

Key features

• VIN input voltage rating up to 30V
• 6.1V overvoltage protection on input
• Maximum 1A charge current
• 4.0V/4.1V/4.2V/4.3V/4.35V/4.4V full charge voltage
• Ultra-low BAT quiescent current below 1uA
• Intelligent thermal regulation
• Intelligent recharge function
• C/10 charge termination
• Charge and end-of-charge indicator control signals
• Package: DFN-8/ESOP8/SOT23-6