NJW4120 Series
Lithium-ion Battery Charger Controller IC with Timer

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  • Description

    The NJW4120 is a 1-cell and 2-cell lithium ion battery charge control IC with a built-in AC-DC secondary side control feature. Using a photocoupler to directly feed back optimum charging voltage and current information to the primary side, it increases energy efficiency, makes possible a smaller charger, and conserves energy. Charging current can be freely set and therefore it is possible to optimize charging according to battery capacity. As safety features it has over voltage, over discharge, temperature detection and a charge over timer. Also, the adaptor and the charge control circuit are integrated on one chip.

  • Spec
    Supply Voltage 2.7V to 14V
    Operating Current Typ. 2mA
    Structure Bi-CMOS Technology
    Wide Operating Temperature -20℃ to +85℃
    Junction Temp. +125℃
    Package DMP20,SSOP20
    Note Charge Control Feedback by Photocoupler
    Adjustable Charge Voltage
    Adjustable Pre-Charge and Full Charge Current
    Temperature Monitor
    Over Charge Timer
    Internal Re-Charge function
    Delay timers and Hysteresis inputs for high noise immunity
    Over Discharge Battery Detect
    Over Voltage Protection
  • Technical
  • Quality &
    • Refer to the datasheets for the details on the product.
    • The package file or the datasheet includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and recommended land pattern.

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Functional Description

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