LTC1732EMS-8.4#PBF

LTC1732-8.4 is a complete constant-current/constant-voltage linear charge controller for lithium-ion (Li-Ion) batteries. Nickel-cadmium (NiCd) and nickel metal hydride (NiMH) batteries can also be charged with constant current using external termination. Charge current can be programmed with ±7% accuracy using external sense and program resistors. An internal resistor divider and precision reference set the final float voltage with ±1% accuracy. When the input supply is removed, this device automatically enters a low current sleep mode, dropping the battery drain current to 10µA. An internal comparator detects the end-of-charge (C/10) condition while a programmable timer, using an external capacitor, sets the total charge time. Fully discharged cells are automatically trickle charged at 10% of the programmed current until battery voltage exceeds 4.9V. It is used in application such as cellular phones, handheld computers, charging docks and cradles, digital cameras and camcorders etc.

• Programmable charge current, automatic battery recharge
• Programmable charge termination timer
• Input supply (wall adapter) detection output
• Input voltage range is 8.8V to 12V
• Automatic trickle charging of low voltage cells
• Programmable for constant-current-only mode
• Battery insertion detect and automatic charging of low-battery
• Input supply current is 1mA typical at (TA = 25°C, VCC = 9V, charger on, current mode)
• Operating temperature is -40° to 85°C
• Package style is 10-lead plastic MSOP

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party