Features
Charge Voltage Regulation Accuracy:
±0.5% ( 0°C to 50°C )
Charge Current Accuracy: ±5%
Maximum 28V Input Voltage Rating with Over-Voltage Protection
Minimum -5V Input Voltage Protection
Complete Charge Process with Pre-Charge, Fast Charge and Constant Voltage Regulation
Programmable Charge Parameters Through I2C Compatible Interface
Programmable Charge Termination and Autonomous Recharge
Wide Range of Fast Charge Current: 2mA~512mA
Strong and Robust Protection: VIN OVP, Battery OVP, OCP, Reverse Leakage Protection, Short Protection, Thermal Protection, PCB Over Temperature Protection
BATFET Control to Support Shipping Mode
Pull Down INT And VIN Pulse Reset System Function
Fully Integrated Power Path Management
Ultra-low Battery Leakage Current to Support Shipping Mode
WLCSP 1.4mm×1.4mm×0.63mm-9B, 0.5mm Pitch Package
7-bit slave address (A7~A1) is 1001001 binary(0x49H)
IEC62368-1 Approved-File No.BE-37454
Description
The AW32012A is a highly-integrated Li-Ion/Li-Polymer battery linear charger with system power path management. The charge process of AW32012A includes: Pre-Charge, Fast Charge and Constant Voltage Regulation. The charge parameters and operating modes are programmable through I2C interface. The charge process runs automatically and recharging occurs when the battery voltage drops below VBAT_REG-VRCH after the charge done status.
The AW32012A is targeted at space limited portable applications. The chip can take input power from either an AC adaptor or a USB port to supply the system load and charge the battery. Meanwhile, the chip provides system short circuit protection function by limiting the current from the input to the system and the battery to the system. These features are effective to protect the battery or chip from damage. The parameters of input current limit, the discharge current limit and safety timer can be programmed by the I2C interface. Additionally, input over voltage protection, input under voltage lockout and input headroom voltage are integrated for good input source detection.
AW32012A separates the charging route from the system power supply to fulfill the power management function. The system power supply is at first priority with no dependency on battery existence. Once a bad power-limited adapter appears at the input, AW32012A would reduce the charging current firstly. If the system load is still too heavy for input source, AW32012A will reduce the input-system current to prevent the input source from being pulled down. Under this circumstance, if the system voltage drops 30mV below the battery voltage, the battery to system supply route will be fully turned on to power the system load, which is supplement mode.
