Maxim Integrated Products has a dual-input linear charger which implements the JEITA (Japan Electronics and Information Technology Industries Association) recommendations for safe charging over temperature.

The MAX8934 monitors battery temperature and automatically adjusts the charge current and termination voltage to a safe level according to temperature.

When external power is connected, the Smart Power Selector circuitry allows the system to operate with no battery or a deeply discharged battery, and automatically switches the system load from the battery.

It operates with either separate inputs for USB and AC adapter power, or from a single input that accepts both. The DC input's current limit is adjustable up to 2A; the USB input's current limit is adjustable to 1.5A.