XYT4257B is a two-section lithium battery boost charge management IC with high integration and reliability. The XYT4257B charging current can be configured with external resistances, and the charging system integrates three loops: input adaptive loop, constant voltage output loop, and constant current output loop, providing excellent performance for the charging system. The XYT4257B‘s boost switch charge converter operates at 650KHz with a maximum 2.0A input charge and a conversion efficiency of 89%. The XYT4257B has an input voltage of 5V and a built-in adaptive loop to intelligently adjust the charging current and match all adapters.

    XYT4257B integrates power MOS and adopts asynchronous switching architecture, so that it requires few peripheral devices in application, which can effectively reduce the overall solution size and reduce BOM cost. The XYT4257B integrates complete protection functions: input overvoltage, input undervoltage, output short circuit, output overvoltage and chip overtemperature protection.