NJW4120 Series

Lithium-ion Battery Charger Controller IC with Timer

Download Datasheet

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

	Consumer
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

Download Datasheet

Quality &
Packages

Product Name	Compatibility	Package	Marking	Reliability
NJW4120M		DMP20	-	NJW-1-s-r
NJW4120V		SSOP20	-	NJW-1-s-r

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.