The LP78511 is an SoC with a highly advanced linear charger and 2-diacharging channel applied for single cell Li-Ion and Li-Polymer batteries. The device is ideally suited for portable applications due to DFN3x3-10 package and low number of external components required.
The device employs a full charge algorithm with trickle current, constant current (CC), constant voltage (CV) modes, charge termination and automatic recharge. The device supports charge current up to 1200mA, programmed by an external resistor. The device can withstand an input voltage up to 36V, which can protect the charger from the accidental insertion of a high voltage supply or a hot insertion.
The 2-discharging channel integrates ultra-low on-resistance (30mΩ typical) NMOS of each channel and built-in charge pump without external capacitor, which is suited for power battery applications. Without an input supply, the battery leakage current is less than 1μA typical.
The device provides various safety features for battery charging, including input under voltage lockout (UVLO), input over-voltage protection (OVP), charging thermal regulation protection that is implemented by reducing the charge current when the junction temperature reaches 140℃. The device provides OTP and OCP protection for discharging channel.
The LP78511 is available in a DFN3x3-10 package.