Overview: High Input Voltage Single Cell Charger with OVP CE3156 Series INTRODUCTION:
The CE3156 is a fully integrated high input voltage single-cell Li-Ion battery charger. The charger uses a CC/CV charge profile required by Li-Ion battery. The charger accepts an input voltage up to 26.5V but is disabled when the input voltage exceeds the OVP threshold, typically 10.5V, to prevent excessive power dissipation. The 26.5V rating eliminates the overvoltage protection circuit required in a low input voltage Charger. The charge current and the full-of-charge (FOC) current are programmable with external resistors. When the battery voltage is lower than typically 2.55V(CE3156-4.2), or 2.65V(CE3156-4.35), the charger preconditions the battery with typically 47.5% of the programmed charge current. When the charge current reduces to the programmable FOC current level during the CV charge phase, an FOC indication is provided by the CHG pin, which is an open-drain output. An internal thermal foldback function protects the charger from any thermal failure. Two indication pins ( PPR and CHG ) allow simple interface to a microprocessor or LEDs. When no adapter is attached or when disabled, the charger draws less than 1μA leakage current from the battery. The CE3156 is available in Green TDFN-2×2-8 package and is rated over the -40℃ to +85℃ temperature range.
