1 Descriptions SC8984 is a highly integrated buck-boost charger optimized for 2~4 cell Li-ion and Li-polymer batteries. It integrates 4 switching power MOSFETs for the buck-boost operation, and can support up to 22V input voltage, so can be used to effectively manage the charging process no matter adapter voltage is higher, lower or equal to battery voltage. The IC can also discharge the cells and deliver desired output up to 22V. The IC also integrates the battery FET to support the NVDC (Narrow VDC) power path management. It provides a highdensity battery charging solution for the smart phone, tablet and other portable devices and supports the USB type-C PD (Power Delivery) charging easily. The IC integrates a 11-bit ADC so user can monitor the voltage and current for both inputs, system output and the battery easily. Through its I2C interface, user can set the charging / discharging mode easily, and program the charging current, charging voltage, system voltage, reverse output voltage, current limits and other parameters flexibly. The IC supports internal current limit, over voltage protection, output short protection and over temperature protections to ensure safety under abnormal conditions. The IC is in a 56-pin 2.9mm x 3.3mm WLCSP package. 2 Features • High efficiency synchronous switch mode buck-boost charger for 2-4 cell battery • Programmable switching frequencies 750kHz/1.125- MHz/1.5MHz • 3.6-V to 22-V Wide input operating voltage range with 30- V absolute maximum rating • Efficiency optimized for charging 2s&4s battery, • Charging current up to 5-A with 10-mA resolution • Maximum power tracking with VINDPM up to 22-V and IINDPM up to 5.1-A • Detect USB BC1.2, SDP, CDP, DCP, HVDCP and nonstandard adapters • Dual-input power mux controller for source selection • Four MOSFETs and BATFET o Q1/Q2/Q3/Q4: 10.7mΩ/19.7mΩ/29.1mΩ/14.4mΩ o QACFET/QBATFET: 4.3mΩ/8.4mΩ • Narrow-VDC (NVDC) Power Path management • Power USB port from battery (USB OTG) • 3-V to 22-V OTG output voltage with 10-mV resolution to support USB-PD PPS • OTG Output current regulation up to 5-A with 40-mA resolution • Integrated 11-bit ADC for voltage/current and temperature monitor • Low battery quiescent current o Typical 45-µA at battery only operation o Typical 9-µA in charger ship mode o Typical 825-nA in charger shutdown mode 

3 Applications • Smart Phone, Tablet and Ultra-book • Mobile Printer and ePOS • Wireless Speaker and Digital Camera • Drone and Portable Medical Devices 4 Device Information ORDER NUMBER PACKAGE BODY SIZE SC8984CFFR WLCSP-56 2.90mm x 3.30mm