DESCRIPTION
The LT®1505 PWM battery charger controller fast charges multiple battery chemistries including lithium-ion (Li-Ion), nickel-metal-hydride (NiMH) and nickel-cadmium (NiCd) using constant-current or constant-voltage control. Maximum current can be easily programmed by resistors or a DAC. The constant-voltage output can be selected for 3 or 4 series Li-Ion cells with 0.5% accuracy.

FEATURES
■ Simple Charging of Li-Ion, NiMH and NiCd Batteries
■ Very High Efficiency: Up to 97%
■ Precision 0.5% Charging Voltage Accuracy
■ Preset Battery Voltages: 12.3V, 12.6V,
   16.4V and 16.8V
■ 5% Charging Current Accuracy
■ Charging Current Programmed by Resistor or DAC
■ 0.5V Dropout Voltage, Duty Cycle > 99.5%
■ AC Adapter Current Limit* Maximizes Charging Rate
■ Flag Indicates Li-Ion Charge Completion
■ Auto Shutdown with Adapter Removal
■ Only 10µA Battery Drain When Idle
■ Synchronizable Up to 280kHz

APPLICATIONS
■ Notebook Computers
■ Portable Instruments
■ Chargers for Li-Ion, NiMH, NiCd and Lead Acid
   Rechargeable Batteries