Lithium-Ion Battery Charger Controller IC With Timer

Manufacturer's part number :


Manufacturer New Japan Radio

New Japan Radio

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 photo coupler 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 mounted on one chip.

View our wide range of Analogue / Mixed signal products

View our portfolio of Semiconductors

See all products from our supplier New Japan Radio

  • Quote and availability


  • 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
  • Bi-CMOS Technology
  • Package Outline (DMP20、 SSOP20)
Features Similar products
Battery Technology Lithium-ion Battery Charger, Controller with timer  

  similar products found

Search similar products
Number of Cells 1/2  
Vcc Range (V) 2.7 to 14  
Operating Temperature (°C) -20 to 85  
Package DMP-20