Preset charging voltages of 4.4V/4.35V/4.2V/3.625V for BAT, with accuracy of ±1% Three-stage charging: trickle/constant current/constant voltage Trickle charging current: 10% ICC Constant current charging current: 100mA~1000mA, set via external resistor on ISET pin, accuracy ±10% ISET short-circuit detection and protection Adaptive adapter adjusts charging current (VIN DPM) Withstands 28V input voltage, no input overvoltage protection circuit required 6V or 10.5V input overvoltage protection 125℃ intelligent thermal regulation, 155℃ thermal shutdown protection No MOSFET, detection resistors, or isolation diodes required Battery temperature detection and protection Power presence and charging status indication Automatic recharging Safety timer duration externally configurable

The SY6101 is a single-cell lithium battery linear charging IC that integrates high-voltage input, input OVP protection, and constant current/voltage. The IC can withstand input voltages up to 28V. To prevent excessive power consumption, the charging function will be disabled when the input voltage exceeds the overvoltage protection threshold of 6V. The ability to withstand input voltages up to 28V eliminates the need for an input overvoltage protection circuit in low-voltage chargers. The constant current charging current ICC can be set via an external resistor connected to the ISET pin, allowing the IC to adapt to more application needs. When the connected battery voltage is below 2.8V, the IC will pre-charge the battery with 10% of the constant current charging current. The SY6101 integrates reverse charge protection, eliminating the need for an external isolation diode. A built-in thermal decay control function intelligently adjusts the charging current to improve the reliability of the IC. The SY6101 features a power tube shutdown function after the battery is fully charged. When the battery voltage is about to be fully charged, charging stops when the charging current is below 10% ICC; when the battery voltage falls below the recharge threshold, charging restarts. The SY6101 provides PG and CHG pins, which are open-drain NMOS drive structures that can drive LED indicator lights and, in combination with the EN pin, allow for simple signal interaction with the MCU. When power is connected to VIN and the IC operating conditions are met, PG is enabled. CHG indicates charging cutoff; when the charging current is below 10% ICC, the internal power tube shuts off, charging stops, and CHG turns off. When the input voltage (AC adapter or USB power) is removed, the SY6101 automatically enters a low-current state.