DESCRIPTION
All protections also have deglitch time against false triggering due to voltage spikes or current transients. Thanks to a very low current consumption, the USB charge is compatible with this integrated component. The WP3880 provides complete Li+ charger protections, and saves the external MOSFET and Schottky diode for the charger of cell phone’s PMIC. This device uses internal PMOS FET, making external devices unnecessary, which reduces the system cost and PCB area of the application board. The above features and small package make the WP3880 an ideal part for cell phones applications. WP3880 is able to instantaneously disconnect the output from the input if the input voltage exceeds the overvoltage threshold. Additional overcurrent protection function allows turning off internal PMOS FET when the charge current exceeds current limit, which is externally selectable. The current limit value can be modified with control logic pin to divide it by internal gain, allowing USB100 mA/500mA charging or USB/Wall adapter charging up to overcurrent threshold.
WAYON
