MAX77789 Standalone 3.15A Charger

ADI's MAX77789 is a standalone, 3.15 A charger with integrated USB Type-C configuration channel (CC) detection and reverse-boost capability. The IC operates with an input voltage of 4.6 V to 13.4 V and has a maximum input current limit of 3 A. The IC also implements the adaptive input current limit (AICL) function that regulates the input voltage by reducing input current to prevent the voltage of a weak adapter from collapsing or folding back.

The USB Type-C CC detection pins on the IC operate in dual role port (DRP) as default and are capable of automatic USB Type-C power source detection and sink devices. The device integrates BC1.2 detection using the D+ and D- pins to support legacy USB and proprietary adapters. The IC automatically runs the CC pin and BC1.2 detection when the USB plug is inserted without software control.

The IC offers reverse-boost capability up to 5.1 V, 1.5 A, which can be enabled with automatic way or register set by system MCU. The STAT1 pin indicates charging status, while the INOKB pin indicates valid input voltage. The EXTSM pin can be used to exit ship mode and force the system to reset (POR), and the STAT2 pin indicates fault detection and charger detection done indication by register bit selection.

The IC is equipped with a Smart Power Selector™ and a battery true-disconnect FET to control the charging and discharging of the battery or isolate the battery in case of a fault. The IC supports Li-ion and LiFePO4 batteries with various termination voltages from 3.6 V to 4.55 V. The IC comes in a 2.85 mm x 2.85 mm, 0.4 mm pitch, 6 x 6 wafer-level package (WLP), making it suitable for low-cost PCB assembly.

The MAX77789EVKIT# evaluation kit (EV kit) is a fully assembled and tested printed circuit board (PCB) that evaluates the MAX77789.