SY8602 is a single-lithium battery linear-charging IC with integrated high voltage input. The charging is disabled with input voltage is higher than the typical protection threshold of 10V input maximum voltage up to 28V, it can work well without over-voltage protect circuit.
The floating charge voltage is 4.2V/4.35V/4.4V, and the constant charging current and charging cut-off current are set by an external resistor. For battery voltage below 2.6V, the battery is pre-charged at 20% of the constant current. The integrated reverse charging protection circuit without external isolating diodes. The PG and CHpin are open-drain which can drive LED.
When the device is powered on and the working conditions are met, PGis turned on. CH is an end-of-charge indication, which is turned off when the charging current is lower than the preset charging cut-off current. When the input voltage (AC adapter or USB power) is removed, the low-current mode is automatically activated.
SY8602 package is TDFN-2x2-8L，and recommended to work within the temperature range of -40°C~+85°C.
Floating voltage is 4.2V/4.35V/4.4V
Charging current within the range of 10mA~500mA, with ±10% accuracy
Charge cut-off current, with ±15% accuracy
Low cut-off current applications such as Bluetooth earbuds
Less components
No need for MOSFET, detection resistor or isolating diode
Input over-voltage protection threshold 10V
28V input voltage, no need for input over-voltage protection circuit
Indication of power source and charging state
Automatic recharge
IEC62368
TDFN-2x2-8L package
Wearable devices
Wireless Bluetooth earbuds
IOT equipment
Intelligent control equipment
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SY8602