Intersil’s charger ISL9204 for 1-cell Li-ion applications accepts input voltages up to 28V but is disabled when the input voltage exceeds the OVP (over-voltage protection) threshold minimum of 10V, enhancing system protection. The device is optimised for smaller cell capacities by setting the trickle charge threshold at 2.7V (recommended by small cell manufacturers) and offering charge current accuracy of 10 percent between 75mA and 150mA. The chip performs the constant current/constant voltage (CC/CV) charge function required by Li-ion batteries. The charge current and end-of-charge (EOC) current are programmable with external resistors. When the charge current reduces to the programmable EOC current level during the constant voltage (CV) charge phase, an EOC indication is provided by the charge (CHG) pin, which is an open-drain output. Two indication pins, power present (PPR) and CHG, allow  interface to a microprocessor or LEDs. Intersil’s ISL9204 is available now in an 8-lead DFN standard or lead-free package.