NJW4100 datasheet(5/19 Pages) NJRC

5 / 19 page

NJW4100

- 5 -

Ver.2005-01-20

■PIN CONFIGULATION

Pin No.

Pin Name

Function

P-CHG

Pre-Charge Current Setting

NFB

Current-Regulation-Loop Compensation

CNT

Charge Control for Output Pin (External PNP Transistor)

GND

F-CHG

Full Charge Current Setting

LED-G

LED Output

LED-R

LED Output

Pre-Charge Timer, 2mA Charge Timer, LED Blinking Cycle, Delay Time Setting

Quick Timer Setting

CHG-SW

Charge ON/OFF Control

Batteries Thermal (High Temperature) Setting

Batteries Thermal (Low Temperature) Setting

TDET

Battery Temperature Detection, Battery Connected Detection

V+

Operating Voltage

VREF

Reference Voltage Output

Battery Voltage Detection

CS2

Charge Current Detection 2

CS1

Charge Current Detection 1

Q-CHG

Quick Charge Current Setting

■CHARGE VOLTAGE / CURRENT for RESISTANCE SETTING

Parameter

Calculation formula

Examples of calculation

Charge Control Voltage

VBAT=

x VREF-CV(4.2V)

4.2V

8.4V

Low Voltage Detection Voltage

VBAT x 0.475

2.00V

3.99V

Quick Charge Start Voltage

VBAT x 0.73

3.07V

6.13V

Re-Charge Detection Voltage

VBAT x 0.95

3.99V

7.98V

Over Voltage Detection Voltage

VBAT x 1.025

4.305V

8.61V

Pre-Charge Current

IP-CHG= (

x VREF(1.24V) / 4) / RCS

(at. RP1:232k

Ω, RP2:16kΩ, RCS=0.2Ω)

100mA

Quick Charge Current

IQ-CHG= (

x VREF(1.24V) / 4) / RCS

(at. RQ1:128k

Ω, RQ2:120kΩ, RCS=0.2Ω)

750mA

Full Charge Current

IF-CHG= (

x VREF(1.24V) / 8) / RCS

(at. RF1:114.4k

Ω, RF2:9.6kΩ, RCS=0.2Ω)

60mA

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