Switch-mode buck charger targets portable applications

3rd May 2019
Mick Elliott

Combining high performance, wide input voltage, and USB Type-C CC detection, the MAX77860 from Maxim Integrated is ideal for USB Type-C charging for single-cell (1S) lithium-ion or lithium-polymer applications, portable medical equipment, portable industrial equipment, and mobile point-of-sale devices, as well as smartphones and Internet of Things (IoT) applications.

The charger, available from Mouser Electronics, features an input operating range of 4V to 13.5V and support for USB Type-C CC detection with reverse boost capability to power USB On-The-Go accessories.

It includes two integrated switches and a single input for both USB and high-voltage adapters. The device’s I²C programmable settings allow it to accommodate a broad range of system loads and battery sizes.

It is protected from input overvoltage events of up to 14V, and features an input current limit of 4A and a battery charging current limit of 3.15A.

The MAX77860 offers a specially designed CC, CV and die temperature regulation algorithm, while the on-chip analogue-to-digital converter (ADC) monitors battery voltage, charging input voltage and current, battery temperature, and charging and discharging current.

Support comes with the MAX77860 evaluation kit, which includes an evaluation board (with onboard MAX77860 charger and an integrated I²C interface) and a MINIQUSB communication device.

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