Universal Battery Charger For Li-ion, Ni-mh And Ni-cd Batteries

The LM3647 is a charge controller for Lithium-Ion (Li-Ion), Nickel-Metal Hydride (Ni-MH) and Nickel-Cadmium (Ni- Cd) batteries. The device CAN use either a pulsed-current charging or a constant-current charging technique. The device CAN also be congured to discharge before charg- ing. Throughout the charging sequence the LM3647 mon- itors voltage and/or temperature and time in order to terminate charging. The charge current of the LM3647 is congured via exter- nal resistors, which in turn controls the duty cycle of the PWM switching control output. For cost-sensitive applica- tions, the LM3647 charge controller CAN be congured without a Temperature Sensor and to use an external cur- rent source. PRELIMINARY March 2000 When using an external current source, the current is con- trolled by the LM3647 which turns the current source on and off. The LM3647 automatically detects the presence of a battery and starts the charging procedure when the bat- tery is installed. Whenever an error occurs (e.g., short cir- cuit, temperature too high, temperature too low, bad battery, charge time over, etc.) the LM3647 will stay in error mode until the battery is removed or it gets within the al- lowed charging temperature range. The LM3647 is avail- able in a standard 20-lead SOIC surface mount package By National Semiconductor Corporation
LM3647 's PackagesLM3647 's pdf datasheet

LM3647 Pinout, Pinouts
LM3647 pinout,Pin out
This is one package pinout of LM3647,If you need more pinouts please download LM3647's pdf datasheet.

LM3647 Application circuits
LM3647 circuits
This is one application circuit of LM3647,If you need more circuits,please download LM3647's pdf datasheet.

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