LTC1731EMS8-8.4#PBF

LINEAR TECHNOLOGY  LTC1731EMS8-8.4#PBF  芯片, 锂电池充电控制器, 双电池

The is a Lithium-Ion Linear Battery Charger Controller that can also charge Nickel-cadmium NiCd and nickel-metal-hydride NiMH batteries with constant current using external termination. The external sense resistor sets the charge current with 7% accuracy. An internal resistor divider and precision reference set the final float potential with 1% accuracy. The output float voltages are set internally to 8.4V. When the input supply is removed, the LTC1731-8.4 automatically enters a low current sleep mode, dropping the battery drain current to typically 15µA. 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 4.95V.

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Complete linear charger controller for 2-cell Lithium-ion batteries

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1% Voltage accuracy

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Programmable charge current

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C/10 charge current detection output

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Programmable charge termination timer

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Automatic sleep mode when input supply is removed 15µA battery drain

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Automatic trickle charging of low voltage cells

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Programmable for constant-current-only mode