High Efficiency, Synchronous Buck Charger for 1-4 cell Li-ion Battery with PowerPath management

The SC89171 is a highly integrated switch-mode buck charger for 1-4 cells Li-ion battery applications. It supports 4-24V input, up to 4A charging current and provide battery charge management functions including trickle charge, constant current charge, constant voltage charge, charge termination, auto recharge and charging status indication. SC89171 also integrates NMOS driver and PMOS driver for Powerpath management, it is easy to support dynamic power management for charging and system power. The SC89171 supports flexible charge current and input current option, and the user can program the current freely through external resistor for different applications. The SC89171 supports input current limit, input over voltage and under voltage protections, internal cycle by cycle current limit, battery short circuit protection, and battery over voltage protection. It also offers charging safety timer and battery temperature protection to ensure safety under different abnormal conditions. Besides, SC89171 keeps monitoring IC temperature and automatically decreases charging current to ensure IC working in normal temperature range. The SC89171 is available in QFN-3.5*5.5 package.


●  Wide input voltage: 4V~24V, 30V sustainable


●  Integrated low-Rdson synchronous buck charger


●  efficiency up to 97% • Charging Management (Trickle Charge / Constant


●  Current Charge / Constant Voltage Charge / Charge Termination/Auto-Recharge)


●  Adjustable Input Current Limit and Charging Current


●  Adjustable Constant Voltage by External Resistor setting

   √ FB version: 2.1V for 1 to 4 cells battery


●  Powerpath management for System Power Selector


●  Adjustable Charge Safety Timer


●  NTC supporting JEITA Standard for Battery temperature Protection


●  Charging Status Indication


●  Adjustable Input Over Voltage and Under Voltage Protection


●  Battery Over Voltage Protection


●  Battery Short Circuit Protection


●  Thermal Regulation and Shutdown


●  QFN 3.5*5.5 footprint


●  Blue tooth speaker charger


●  Portable Media Players


●  Notebook, Tablet


●  POS machine

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