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SY8821
Automatic identification standby current: 5uA Constant output standby current: 2.5uA Charging current can be adjusted by external resistor Maximum linear charging current: 1A Charging current temperature adjustment function, charging current automatically decreases with increasing temperature C/10 charging termination, automatic recharging 4.2V/4.35V charging float voltage, accuracy up to ±1% Integrated overvoltage protection during charging Synchronous boost output 5.05V, efficiency up to 93%@0.1A Supports load insertion identification Supports light load detection of load current, light load detection current 3mA Has two-level overcurrent protection function for load current Supports 5.05V constant output Boost output thermal regulation function Discharge module overcurrent, short circuit, overvoltage, overtemperature protection 1-4LED display, external automatic identification KEY version: Integrated key function, single click to start discharge & power display, long press 3S key to turn off discharge HALL version: Supports direct driving of HALL chip, automatic start of discharge when the box is closed, automatic power-on and reconnection of the headset when the box is opened
Category：
- Product Description
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- Commodity name: SY8821
- 封装: QFN16
- 品牌: Siyuan Semiconductor
Automatic identification standby current: 5uA Constant output standby current: 2.5uA Charging current can be adjusted by external resistor Maximum linear charging current: 1A Charging current temperature adjustment function, charging current automatically decreases with increasing temperature C/10 charging termination, automatic recharging 4.2V/4.35V charging float voltage, accuracy up to ±1% Integrated overvoltage protection during charging Synchronous boost output 5.05V, efficiency up to 93%@0.1A Supports load insertion identification Supports light load detection of load current, light load detection current 3mA Has two-level overcurrent protection function for load current Supports 5.05V constant output Boost output thermal regulation function Discharge module overcurrent, short circuit, overvoltage, overtemperature protection 1-4LED display, external automatic identification KEY version: Integrated key function, single click to start discharge & power display, long press 3S key to turn off discharge HALL version: Supports direct driving of HALL chip, automatic start of discharge when the box is closed, automatic power-on and reconnection of the headset when the box is opened
The SY8821 is a chip specifically designed for Bluetooth earphone charging cases. The chip integrates charging and discharging modules. The charging current is externally adjustable; the discharging module integrates two output current limiting switches, providing independent load presence detection and load insertion detection, while also supporting output current detection. The chip integrates an NTC protection function for safer battery charging and discharging.
The SY8821 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 case applications.
The SY8821 uses a 3mm*3mm QFN16 package.
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