Standby current: 5uA Charging current externally adjustable via resistor, constant VIN current Maximum charging current: 1.2A Input voltage withstand up to 28V Charging efficiency up to 93%@0.5A Charging switching frequency: 1MHz Simultaneous charging and discharging path management, discharging priority Charging current temperature adjustment function, charging current automatically decreases with increasing temperature C/10 charging termination, automatic recharging Preset 4.2V/4.35V charging float voltage, accuracy up to ±1% Integrated overvoltage protection during charging and battery overtemperature protection Synchronous boost output 5V, efficiency up to 93%@0.1A Discharging switching frequency: 1MHz Supports load insertion detection Supports load current detection, light load shutdown current externally adjustable via resistor Unique boost output thermal regulation function Discharge module overcurrent, short circuit, overvoltage, and overtemperature protection 1-4 LED display, external automatic identification; supports headphone insertion prompt Integrated button function, single click to discharge, long press to turn off discharge (optional version) Supports direct driving of Hall chip, automatic charging when closed, automatic reconnection when opened (optional version) Complies with the latest IEC62368 standard Product reference application diagram

The SY8802 is a single-chip solution designed specifically for Bluetooth earphone charging cases. The chip integrates charging and discharging modules, with externally adjustable charging current and discharge cutoff current. It also provides load insertion detection and light-load automatic shutdown functions. The chip supports 1-4 LED battery level indicators. The SY8802_KEY version integrates a button function: a single click starts discharging, and a long press stops discharging. The SY8802_HALL version supports direct control by a HALL sensor chip, enabling automatic charging when the case is closed and automatic reconnection when opened. The SY8802 is ideal for Bluetooth earphone charging case designs, greatly simplifying the peripheral circuitry and components, and providing a simple and easy-to-use solution for Bluetooth earphone charging cases. The SY8802 uses a QFN16-4*4 package.

Product Features