LM3622
FEATURES
- 2 Versions for charging of 1 cell (4.1V or 4.2V) or 2 cells (8.2V or 8.4V)
- Versions for coke or graphite anode
- Precision (±30m V/cell) end-of-charge control
- Wide input range: 4.5V-24V
- Low battery drain leakage: 200n A
- 15 m A available to drive low cost PNP
APPLICATIONS
- Cellular phone cradle charger
- PDA/Notebook cradle charger
- Camcorder cradle charger
DESCRIPTION
The LM3622 is a charge controller for Lithium-Ion batteries. This monolithic integrated circuit accurately controls an external pass transistor for precision Lithium-Ion battery charging. The LM3622 provides a constant voltage or constant current (CVCC) configuration that changes, as necessary, to optimally charge lithium-ion battery cells. Voltage charging versions (4.1V, 4.2V, 8.2V, and 8.4V) are available for one or two cell battery packs and for coke or graphite anode battery chemistry.
The LM3622 accepts input voltages from 4.5V to 24V. Controller accuracy over temperature is ±30m V/cell for A...
