LTC4007-1
4A, High Efficiency,
Li-Ion Battery Charger
Features Description Charger Controller for 3-or 4-Cell Lithium-Ion Batteries
n High Conversion Efficiency: Up to 96%
n Output Currents Exceeding 4A
n ±0.8% Charging Voltage Accuracy
n Built-In Charge Termination for Li-Ion Batteries
n AC Adapter Current Limiting Maximizes Charge Rate*
n Thermistor Input for Temperature Qualified Charging
n Wide Input Voltage Range: 6V to 28V
n 0.5V Dropout Voltage; Maximum Duty Cycle: 98%
n Programmable Charge Current: ±4% Accuracy
n Indicator Outputs for Charging, C/10 Current
Detection, AC Adapter Present, Low Battery, Input
Current Limiting and Faults
n Charging Current Monitor Output
n Available in a 24-Pin 4mm × 5mm QFN Package The LTC®4007-1 is a constant-current/constant-voltage
charger controller for 3-or 4-cell lithium-ion batteries.
The PWM controller uses a synchronous, quasi-constant
frequency, constant off-time architecture that will not
generate audible noise even when using ceramic capacitors. Charging current is programmable to ±4% accuracy
using a programming resistor. Charging current can also be …