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Analog Devices Inc. MAX77962 3.2A USB Type-C® Buck-Boost Charger operates as a reverse buck without an additional inductor, allowing the IC to power USB On-the-Go (OTG) accessories. The MAX77962 operates with a wide input range from 3.5V to 23.0V, which is ideal for USB-C charging applications. The charger input current limit is programmable from 50mA to 3.15A, which is flexible to operate from either an AC-to-DC wall charger or a USB Type-C adapter. The MAX77962 offers a high level of integration and does not require any external MOSFETs to operate, significantly reducing the solution size. This device’s charging current is programmable from 50mA to 3.2A, which accommodates small or large capacity batteries.
The reverse buck of the MAX77962 has a true-load disconnect and is protected by an adjustable output current limit. The device is highly flexible and programmable through I2C configuration or autonomously through resistor configuration.
The MAX77962 includes Smart Power Selector™, enabling the device to accommodate a wide range of battery sizes and system loads. The Smart Power Selector allows the system to start-up gracefully when an input source is available even when the battery is deeply discharged (dead battery) or missing. For battery safety and authentication reasons, the IC can be configured to keep charging disabled and allow the DC-DC to switch and regulate the SYS voltage. The system processor can later enable charging using the appropriate I2C commands. Alternatively, the IC can be configured to automatically start charging.
