General Description

  The ET9513C is a cost-effective, fully integrated 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 28V but is disabled when the input voltage exceeds the OVP threshold, typically 6.9V, to prevent excessive power dissipation. The 28V rating eliminates the over-voltage protection circuit required in a low input voltage charger.

  The charge current and the end-of-charge (EOC) current are programmable with external resistors. When the charge current reduces to the programmable EOC current level during the CV charge phase, an EOC indication is provided by the CHGSB pin, which is an open-drain output. An internal thermal foldback function protects the charger from any thermal failure.

  Two indication pins (PGB and CHGSB) allow simple interface to a microprocessor or LEDs. An internal top off timer will make ET9513C enter into standby mode after 38 minutes of full charged.

  When no adapter is attached or when disabled, the charger draws less than 10uA leakage current from the battery.

Features

●  28V Maximum Voltage for the Power Input

●  Internal Integrated Power MOSFETs

●  An internal top off timer

●  Support 4.2V or 4.35V/2.3A Factory Mode

●  50mA Low Dropout Voltage Regulator

●  Status Pin Indicator

●  Programmed Charging Current

●  Programmed End-of-Charge Current

●  Under Voltage Lockout

●  Over Voltage Protection

●  Over Temperature Protection

●  Reverse Current Blocking

Application

●  Cell Phones

●  PDA, MP3

●  Digital Cameras

●  Other Hand-held Devices

Pin Configuration

Application Circuits