LTC4002EDD-8.4#PBF

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1. Description

LTC4002EDD-8.4#PBF is a complete battery charger controller for One (4.2V) or two (8.4V) lithium-ion batteries. Use one 500kHz switching frequency, LTC4002 provides a Small, simple and efficient lithium-ion fast charging solution Batteries from various power supply voltages. An external The sense resistor sets the charging current with an accuracy of ±5%. The final float voltage of each battery is 4.2V, and the accuracy is ±1%.When the input power is removed, the LTC4002 automatically enters a low-current sleep mode, thereby reducing the battery leakage current to 10μA. The internal comparator detects that the charging is about to end, and the internal timer sets the total charging time and terminates the charging cycle. After the charging cycle is over, if the battery voltage drops below 4.05V per battery, a new charging cycle will start automatically. The LTC4002 is available in 8-lead SO and 10-lead DFN packages.

2. Feature

    1. Wide input power range:

        - 4.7V to 22V-4.2 version

        - 8.9V to 22V-version 8.4

    2. High-efficiency current mode PWM controller with 500kHz switching frequency

    3. ±1% charging voltage accuracy

    4. Charge end current detection output

    5. 3 hours charge termination timer

    6. Constant switching frequency with minimum noise

    7. ±5% charge current accuracy

    8. Low 10µA reverse battery leakage current

    9. Automatic battery charging

  10. Automatically shut down when the input power is removed

  11. Low-voltage battery automatic trickle charging

  12. Battery temperature sensing and charging certification

  13. Stable ceramic output capacitor

  14. 8-pin SO and 10-pin DFN packages

3. Application

    1. Portable computer

    2. Charging stand

    3. Handheld instrument

4. Pin configuration