NJW4100

- 1 -

Ver.2005-01-20

Lithium-ion Battery Charger Controller IC with Timer

GENERAL DESCRIPTION

PACKAGE OUTLINE

FEATURES

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

NJW4100M : DMP20
NJW4100V : SSOP20

PIN CONFIGURATION

The

NJW4100

is a Lithium-ion Battery Charger Controller

IC with over charger timer.
Charger current and voltage can individually be set by the
external resistors. Therefore, it can be used for a wide range
of battery cells for both 1-cell and 2-cell applications.
It includes a lot of safety features for safety conscious
design: Over voltage, Over discharge, temperature monitor
and over charge timers.

NJW4100M NJW4100V

P-CHG

NFB

CNT

GND

F-CHG

LED-G

LED-R

CHG-SW

TDET

VREF

CS2

CS1

Q-CHG

NJW4100M
NJW4100V

NJW4100

- 2 -

Ver.2005-01-20

ABSOLUTE MAXIMUM RATINGS (Ta=25°C)

PARAMETER SYMBOL

MAXIMUM

RATINGS

UNIT

Operating Voltage

+15 V

C1 Pin Voltage

+5 V

C2 Pin Voltage

+5 V

TDET Pin Voltage

TDET

+5 V

CNT Pin Output Current

SINK-CNT

50 mA

LED-G Pin Output Current

SINK-G

20 mA

LED-R Pin Output Current

SINK-R

20 mA

Power Dissipation

DMP20 :300
SSOP20 :300

Operating Temperature Range

OPR

-20 ~ +85

Storage Temperature Range

STG

-40 ~ +125

ELECTRICAL CHARACTERISTICS (V

=5V, Ta=25

PARAMETER SYMBOL

TEST

CONDITION

MIN.

TYP.

MAX.

UNIT

General Characteristics

Operating Voltage

Operating Current

CHG-SW:

OPEN

2 3

Under Voltage Lockout Block

ON Threshold Voltage

T-ON

2.2 2.4 2.6 V

OFF Threshold Voltage

T-OFF

2.0 2.2 2.4 V

Hysteresis Voltage

HYS

100 200 300 mV

Reference Voltage Block

Reference Voltage

REF

=0mA 1.228

1.24

1.253

Load Regulation

REF

=0mA~1mA

10 mV

Voltage Detection Block

Quick Charge Detection Voltage

Q-CHG

VS:

BAT

x 0.71

BAT

x 0.73

BAT

x 0.75

Re-Charge Detection Voltage

R-CHG

VS:

BAT

x 0.94

BAT

x 0.95

BAT

x 0.96

Over Voltage Detection Voltage

VS:

BAT

x 1.015

BAT

x 1.025

BAT

x 1.035

Charge Control Block
Reference Voltage

REF-CV

4.17 4.2 4.23 V

VS Pin Input Bias Current

VS=4.2V

50 500 nA

Battery Connected
Detection Voltage

T-TDET

TDET

1.15

Low Voltage Detection (2mA Charge) Block

Charge Current

CHG1

VS=1V

1 2 3

Low Voltage Detection Voltage

VS:

BAT

x 0.455

BAT

x 0.475

BAT

x 0.495

NJW4100

- 3 -

Ver.2005-01-20

ELECTRICAL CHARACTERISTICS (V

=5V, Ta=25

PARAMETER SYMBOL

TEST

CONDITION

MIN.

TYP.

MAX.

UNIT

Current Detection Block

Pre-Charge /Quick Charge Block
Voltage Gain

CS1=3.8V,

CS2=3.6V

11.5 12 12.5 dB

Full Charge Block Voltage Gain

CS2=VS=4.2V,

F-CHG

=96mV 15.5 18 21 dB

F-CHG Pin Input Voltage Range

F-CHG

CS2=VS=4.2V

CS1 Pin Input Bias Current

CS1

CS1=4.2V

10 500 nA

CS2 Pin Input Bias Current

CS2

CS2=4.2V

10 500 nA

Output Block

CNT Pin Saturation Voltage

OL-CNT

SINK

=20mA

0.2 0.5 V

CNT Pin Leak Current

LEAK-CNT

=14V

LED Out Block

LED-G Pin Saturation Voltage

OL-G

SINK

=10mA

0.2 0.5 V

LED-G Pin Leak Current

LEAK-G

=14V

LED-R Pin Saturation Voltage

OL-R

SINK

=10mA

0.2 0.5 V

LED-R Pin Leak Current

LEAK-R

=14V

Timer Block

OSC1 Timer Error Time

T1 -10

+10 %

OSC2 Timer Error Time

C1=C2=0.01

F external

Not including external deviation

-10

+10 %

CHG-SW Block

ON Threshold Voltage

SW-ON

0.25 V

OFF Threshold Voltage

SW-OFF

Pull-up Resistance

PULL-UP

300 500 700 k

NJW4100

- 4 -

Ver.2005-01-20

TYPICAL APPLICATION

REF1

REF2

OSC

CLK

Control
Logic

PULL-UP

6dB

CVCC-ON

REF2

12dB

CVCC-ON

Charge
-ON

Quick/
Pre-Charge

CVCC-ON

CS1 pin

LED-G

LED-R

2mA

Charge

ON/OFF

Battery
Voltage
Detection

Q-CHG

P-CHG

REF

CS2

NFB

CS1

TDET

TH

TL

Lithium Ion Battery

Rcs

CS2

F-CHG

CNT

REF

CHG-SW

LED-G

LED-R

GND

REF

Input

GND

When is -cell

Short

Open

Re-Charge

Quick Charge

Over Voltage
Detection

Low Voltage
Detection

Low Temperature
Detection

High Temperature
Detection

Battery Connected
Detection

UVLO

r
e-

har

t
r
o
l

i
ck C

a
r
g

t
r
o
l

Reference

Voltage 1

1.24V

Reference

Voltage 2

4.2V

Full
Charge
Timer

Pre-
Charge
Timer

Full Charge
Detection

Start/Stop
Time Out

BAT

x 0.95

BAT

x 0.73

BAT

x 1.025

BAT

x 0.475

NJW4100

- 5 -

Ver.2005-01-20

PIN CONFIGULATION

Pin No.

Pin Name

Function

P-CHG

Pre-Charge Current Setting

2 NFB

Current-Regulation-Loop

Compensation

CNT

Charge Control for Output Pin (External PNP Transistor)

4 GND

GND

5 NC

F-CHG

Full Charge Current Setting

7 LED-G

LED

Output

8 LED-R

LED

Output

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

10 C2

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

15 V

Operating

Voltage

16 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

BAT

x V

REF-CV (4.2V)

4.2V 8.4V

Low Voltage Detection Voltage

BAT

x 0.475

2.00V

3.99V

Quick Charge Start Voltage

BAT

x 0.73

3.07V

6.13V

Re-Charge Detection Voltage

BAT

x 0.95

3.99V

7.98V

Over Voltage Detection Voltage

BAT

x 1.025

4.305V

8.61V

Pre-Charge Current

P-CHG

= (

x V

REF (1.24V)

/ 4) / R

(at. R

:232k

, R

:16k

, R

=0.2

)

100mA

Quick Charge Current

Q-CHG

= (

x V

REF (1.24V)

/ 4) / R

(at. R

:128k

, R

:120k

, R

=0.2

)

750mA

Full Charge Current

F-CHG

= (

x V

REF (1.24V)

/ 8) / R

(at. R

:114.4k

, R

:9.6k

, R

=0.2

)

60mA

NJW4100

- 6 -

Ver.2005-01-20

TYPICAL CHARACTERISTICS

4.14

4.16

4.18

4.2

4.22

4.24

4.26

-50

-25

100 125

Ambient Temperature

Ta (

e
f
e
r
enc

e V

o
l
t
a

g
e

F
-
CV

)

Charge Control Block Reference Voltage

vs. Temperature (V

=5V, VS Pin)

1.22

1.225

1.23

1.235

1.24

1.245

1.25

-50

-25

100 125

Ambient Temperature

Ta (

f
e
r
e
nc

e V

o
l
t
ag

)

Reference Voltage vs. Temperature

=5V, I

REF

=0mA)

11.4

11.6

11.8

12.2

12.4

12.6

-50

-25

100 125

Ambient Temperature

Ta (

e
-
C

h
a

r
g
e
/
Q

u
i
ck C

h
a
r
g
e

Bl

o
ck

l
t
ag

e G

a
i
n

A

(dB

)

Pre-Charge/Quick Charge Block Voltage Gain

vs. Temperature (V

=5V, CS1=3.8V, CS2=3.6V)

0.2

0.3

0.4

0.5

0.6

0.7

0.8

-50

-25

100 125

Ambient Temperature

Ta (

h
re

s
h

d V

o
l
t
a
g
e

(

)

CHG-SW Block Threshold Voltage

vs. Temperature (V

=5V)

SW_OFF

SW_ON

0.5

1.5

2.5

-50

-25

100 125

Ambient Temperature

Ta (

p
er

a
t
i
n
g
C

r
r
en

t

I

)

Operating Current vs. Temperature

=5V, CHG-SW:OPEN)

NJW4100

- 7 -

Ver.2005-01-20

TYPICAL CHARACTERISTICS

0.1

0.2

0.3

0.4

0.5

a
t
u
r
a
t
i
on V

o
l
t
a
ge

-
C

)

CNT Pin Saturation Voltage vs. Sink Current

=5V, Ta=25

Sink Current I

SINK

(mA)

0.1

0.2

0.3

0.4

0.5

a
tur

a
ti
o
n
V

o
l
t
ag

e V

)

LED Pin Saturation Voltage vs. Sink Current

=5V, Ta=25

Sink Current I

SINK

(mA)

LED-R

LED-G

100

0.001

0.01

0.1

s
c
i
l
l
a
t
i
on C

y
c
l
e

,

OS

2

(
m

s
)

Oscillation Cycle vs. Capacitance

=5V, Ta=25

Capacitance C1, C2 (

-50

-25

100 125

Ambient Temperature

Ta (

s
c
i
l
l
at

i
o
n

y
c
l
e

1
,
O

(ms

)

Oscillation Cycle vs. Temperature

=5V, C1=C2=0.01

NJW4100

- 8 -

Ver.2005-01-20

FEATURE DESCRIPTION

1. Voltage Detection Block (VS pin)

The VS pin determines charge voltage, low voltage, over voltage, and re-charge voltage. Battery voltage conditions are
constantly monitored. (Figure 1)

1-1. Charge Voltage (VS pin)

Charge voltage V

BAT

is set using the VS pin external

resistors R

and R

and the following equation:

BAT

x V

REF-CV (4.2V)

Using the following settings makes it easy to support
applications for one or two cells: for one cell, R

= short,

and R

= open; for two cells, R

If you use a high resistance, the VS pin's bias current will
cause incorrect values. Use as low a resistance as
possible.

1-2. Overcharge Detection Block (VS pin)

The overcharge detection block stops charging when a
high voltage is detected at the VS pin.
The overcharge detection voltage is obtained with the following equation:

BAT

1.025 (typ.)

When overcharge is detected, charging is prohibited and LED-R blinks. After that, charge will continue to be prohibited, even
after battery voltage drops to a normal value. Turning the power off to release UVLO, battery connection detection, or
CHG-SW switching will enable the charge sequence to restart.

1-3. Low Voltage Detection (2mA charge) Block (VS pin, CS1 pin)

The low voltage detection block detects an
over-discharged battery, or an open battery caused by
the battery protection circuit or the like. This will
determine a 2mA charge prior to pre-charging.
The low voltage detection voltage is obtained with the
following equation:

BAT

0.475 (typ.)

During a 2mA charge, the block monitors battery voltage
recovery while a steady 2mA current is output from the
CS1 pin. (Figure 2)
If voltage does not recover within a prescribed time, the
timer will prohibit 2mA charging. Turning the power off to
release UVLO, battery connection detection, or CHG-SW
switching will enable the charge sequence to restart.

1-4. Re-Charge Detection (VS pin)

When a fully charged battery is left for a long period of time, voltage will drop due to self-discharge. The re-charge detection
block detects a drop in voltage and re-charges the battery.
The re-charge detection voltage is obtained with the following equation.

R-CHG

BAT

0.95 (typ.)

Low Voltage
Detection

12dB

CS1

Rcs

CS2

To Charge
Output

Control Block

2mA Charge
Current

To Charge Current
Control Amp

2mA Charge

BAT

x 0.475

To Charge

Control Block

To OR
Circuit

Charge Voltage
Control Amp

REF2

CVCC-ON

Low Voltage
Detection

Over Voltage
Detection

Recharge
Detection

Quick Charge
Detection

Battery
Voltage
Detection

For 1 Cell

: Short

: Open

BAT

x 0.95

BAT

x 0.73

BAT

x 1.025

BAT

x 0.475

Figure 1. Voltage Detection Block Configuration

Figure 2. 2mA Charging Block

NJW4100

- 9 -

Ver.2005-01-20

FEATURE DESCRIPTION (CONTINUED)

2. Current Detection Block (CS1 pin, CS2 pin)

A current detection resistor R

is inserted between pin CS1 and pin CS2 to monitor battery charge current.

The input voltage between pin CS1 and pin CS2 is amplified by the 12dB current detection amp and fed back to the charge
current control amp. (Figure 3)

2-1. Pre-Charge Current, Quick Charge Current (P-CHG pin, Q-CHG pin)

This will switch between charging with pre-charge current or quick charge current according to the level of the battery
voltage V

BAT

that is input from the VS pin.

BAT

x 0.475 to V

BAT

x 0.73

Pre-charge control

BAT

x 0.73 to V

BAT

Quick charge control

Pre-charge and quick charge current values are determined by the P-CHG pin and the Q-CHG pin voltage settings.
Settings are made according to the following formulae.

Pre-Charge Current Value

P-CHG

= (

x V

REF (1.24V)

/ 4) / R

Quick Charge Current Value

Q-CHG

= (

x V

REF (1.24V)

/ 4) / R

2-2. Full Charge Detection (F-CHG pin)

Charge termination is determined by a set full
charge current

F-CHG

, which is determined by a

voltage setting on the F-CHG pin.

F-CHG

= (

x V

REF (1.24V)

/ 8) / R

When charging is terminated, LED-G turns on,
and the sequence moves to the re-charge
detection operation.

Figure 3. Block for Controlling Pre-Charge, Quick Charge,

and Block for Detecting Full Charge.

To OR

Circuit

Quick Charge
Detection

Full Charge
Detection

6dB

CVCC-ON

12dB

r
e-

Char

Cur

r
ent

Setti

u
i
c
k
Char

Cur

r
ent

Setti

Quick/

Pre-Charge

Q-CHG

P-CHG

REF

CS2

NFB

CS1

Rcs

CS2

F-CHG

REF

To Charge
Output

Switch Pre/Quick
Charge Current

Control Block

To Charge Voltage
Control Amp

Charge Current

Control Amp

BAT

x 0.73

NJW4100

- 10 -

Ver.2005-01-20

FEATURE DESCRIPTION (CONTINUED)

3. Charge Control Output Block (CNT pin)

A PNP transistor connected to the CNT pin controls the voltage and current required to charge the battery.
When the CHG-SW pin and battery-connected detection are both ON the system moves to charge control mode. If battery
voltage and temperature conditions are appropriate, charging will begin. During 2mA charging the PNP transistor will go to
OFF status.

4. Temperature Detection Block, Battery Connected Detection Block (TDET pin, TH pin, TL pin)

The charge temperature range is set with the TL pin (high temperature) and the TH pin (low temperature).
The threshold voltage for the temperature detection comparator is set with the external resistors R

THL

, R

. Therefore,

you can select any type of thermistor (NTC) and any charge temperature range (Figure 4).

The TL pin and the TH pin are set to go to the potential states shown below for fluctuations in TDET voltage.
V

(high temperature) < V

TDET

(charge Temperature) < V

(low temperature)

Pin voltages are obtained from the
following formulae.

TDET pin (thermistor setting)

)

(

REF

TDET

TH pin (low temperature setting)

)

(

REF

THL

TL pin (high temperature setting)

)

(

REF

THL

Figure 4 Temperature Detection Block

When the detected temperature goes out of the range of the set values, charging stops, and LED-R and LED-G turn off.
After temperature is restored, charging recommences in line with battery voltage status.

The TDET pin is also used for the battery-connected detection feature.
The battery-connected detection feature determines that a battery is connected if TDET pin voltage is no greater than
1.15V(typ.), and commences charging.

Battery Connected
Detection

Low Temperature
Detection

High Temperature
Detection

Charge

-ON

TDET

TH

TL

Lithium Ion Battery

REF

To CHG-SW

THL

TDET

To UVLO

T-TDET

=1.15V

NJW4100

- 11 -

Ver.2005-01-20

FEATURE DESCRIPTION (CONTINUED)

5. Delay Circuits (each detection block)

Each detection block has a delay circuit and extra features for preventing malfunction due to noise or excess signals.

Table 1 Delay Circuits and Extra Features.

Detection Block

Delay Circuit

Extra Feature

Low Voltage Malfunction
Prevention Circuit

Hysteresis

CHG-SW Hysteresis
Battery Connected
Detection

Hysteresis

Temperature Detection

Hysteresis

Full Charge Detection

Re-Charge Detection

Low Voltage Detection

Hysteresis

Over Voltage Detection

Delay I

Latch

Quick Charge Detection

Delay II

Hysteresis

The delay circuit block receives a signal from the timer circuit to fix a delay time.
For details on the relationship between the delay time and capacitors see "6. Timer Circuit Block".

6. Timer Circuit Block (C1 pin, C2 pin)

OSC1 is used for the timer that is used for pre-charge, 2mA charge and the like. OSC2 is used for the quick charge timer.
You can change the time of the timers with external capacitors. Tables 2, 3 show the relationship between capacitance and
time.

Table 2 C1, C2 Oscillation Cycle t

Capacitance (C1, C2)

Oscillation Cycle

(OSC1, OSC2)

4700pF t

4.7ms

0.01

t = 10ms

0.022

t = 22ms

0.047

t = 47ms

Table 3 Timer Time

Use capacitors the have good temperature characteristics in the OSC block.
Capacitor deviation will cause timer errors.

Block Name

Parameter

Calculation

Formula

Examples

2mA Charge Timer

tx2

10.2s

Pre-Charge Timer

tx2

22min.

LED R Blinking Cycle

tx2

1.28s

Delay I

tx2

0.32s

Pre-Charge Timer

Delay II

tx2

0.16s

C1=0.01

Quick Charge Timer

tx2

2hours

min. C2=0.01

NJW4100

- 12 -

Ver.2005-01-20

FEATURE DESCRIPTION (CONTINUED)

In each charge mode if time-over occurs charging is prohibited and LED-R blinks. Turning the power off to release UVLO,
battery connection detection, or CHG-SW switching will enable the charge sequence to restart.

NJW4100 incorporates a test mode that shortens the timer block function's test time by 1/150,000.
To operate in test mode set the TH pin voltage to a value no greater than that of the TL pin. In test mode, regardless of the
external timing capacitors C1, C2, the internal timer clock frequency will operate in a range of approximately 200kHz to
300kHz. The following shows calculation values when the oscillating frequency is 250kHz (4

s cycle).

Table 4. Timer Times in Test Mode.

When the TDET pin voltage is approximately 1.2V or greater, the pre-charge / quick charge timers operate normally.
If you want to further reduce the test time, setting TDET pin voltage makes it possible to run each of the timer counters
divided in half. When the TDET pin is approximately 0.3V or less, the first half of the counter is bypassed. When the voltage
is approximately greater than 0.4V and less than 1.1V, the second half of the counter is bypassed.

Table 5. Reduced Test Time Mode

Block Name

Parameter

Calculation

Formula

Example

(t = Appx. 4

2mA Charge Timer

tx2

Appx.

4ms

Pre-Charge Timer

tx2

Appx.

0.5s

LED R Blinking Cycle

tx2

Appx.

0.5ms

Delay I

tx2

Appx.

0.13ms

Pre-Charge Timer

Delay II

tx2

Appx. 64

Quick Charge Timer

tx2

Appx.

4.2s

Parameter

Calculation

Formula

Example (t =Appx. 4

Pre-Charge Timer

tx2

, tx2

Appx.

1ms,

Appx.

1ms

Quick Charge Timer

tx2

, tx2

Appx.

2ms,

Appx.

4ms

NJW4100

- 13 -

Ver.2005-01-20

FEATURE DESCRIPTION (CONTINUED)

7. Reference Voltage Block (VREF pin)

This block generates 1.24V and 4.2V reference voltages. The VREF pin outputs 1.24V. In addition to the IC internal
reference voltage, this is also used as a reference voltage for charge current setting and temperature detection setting.

8. Power Block,

Under Voltage Lockout

Circuit (UVLO) Block (V

pin, GND pin)

An integrated

Under Voltage Lockout

circuit prevents IC malfunction when power is turned on or off. This circuit

incorporates a 200mV hysteresis width to prevent chattering.
As required, insert a bypass capacitor near the IC's V

pin when there is power line noise or when wires are long.

9. LED Block (LED-R pin, LED-G pin)

The 2 LEDs can indicate charge status. (Figure 5)
The LED drive circuit is an open collector output configuration.
Therefore, it is easy to set a constant LED drive current with resistance values.
The expression for setting the current that flows through the LEDs is shown below.

LED-G

(Vcc - V

F-LED

- V

OL-G

) / R

LED

LED-R

(Vcc - V

F-LED

- V

OL-R

) / R

LED

Figure 5. LED Drive Circuit

LED-G

LED-R

Input

F-LED

LED

NJW4100

- 14 -

Ver.2005-01-20

FLOW CHART

Start

Pre-Charge

Timer Start

YES

Check

Adapter Voltage

>2.4V

Check

Battery Temp.

TDET

YES

Check

Battery Voltage

BAT

YES

Check

Voltage

BAT

Q-CHG

Quick Charge

Timer Start

Quick Charge Start

LED-G: OFF

LED-R: ON

YES

Time Out

YES

Battery

Battery Voltage

BAT

Q-CHG

Time Out

Check

Full Charge

BAT

F-CHG

YES

Charge Complete

LED-G: ON

LED-R: OFF

Check

Battery Voltage

BAT

R-CHG

YES

Check

Battery Connection

CHG-SW Pin=GND

YES

Abnormal Charging

Prohibited

LED-G: OFF
LED-R: OFF

LED-G: OFF

LED-R: ON

2mA Charge: ON

Abnormal Charging

Prohibited

LED-G: OFF

LED-R: ON/OFF

Pre-Charge Start

2mACharge: OFF

YES

Check

Battery Voltage

BAT

YES

Time Out

Check

Battery Connection

TDET

<1.15V

YES

Adaptor voltage, Battery connection,
Battery Temp. and Battery voltage are
monitored during charging.

When charging is prohibited, one of the
following action resumes the charging;
Unplug and plug power supply
Remove and set batteries
Charge-SW ON/OFF

NJW4100

- 15 -

Ver.2005-01-20

TIMING CHART

Battery
Voltage

Charging
Current

Pre-

Charge

Quick

Charge

Constant

Voltage

Charge

Full

Charge

CHG-SW

LED-R

LED-G

Re-

Charge

Pre-Charge Current
Full Charge Current

Quick Charge
Detecting Voltage

Quick Charge Current

Charge Control Voltage
Re-Charge Detecting Voltage

OFF

The timing chart at the time of protection circuit operation

In addition to a charge timing chart, a protection circuit with a built-in IC operates according to the state and
circumference environment of a battery.
The timing chart when various protection circuits operate is as follows.

Pre-charge

time

out

Quick charge time out

Battery
Voltage

Charge
Current

CHG-SW

LED-R

LED-G

Quick charge detecting voltage

OFF

CNT

Inactive

OFF

Pre-charge

22min*

Charge
Current

CHG-SW

LED-R

LED-G

Charge Voltage

OFF

CNT

OFF

Quick charge

3h*

Full charge
detection

*C1=0.01

F *C2=0.01

ON/OFF 1.28s*

ON/OFF

Active Inactive

Inactive

Active Inactive

Battery
Voltage

NJW4100

- 16 -

Ver.2005-01-20

Over voltage battery (Return)

Over voltage battery(Abnormalities)

Battery Voltage

Charge
Current

CHG-SW

LED-R

LED-G

Low voltage
detecting voltage

OFF

CNT

OFF

Pre-charge

2mA

Battery Voltage

Charge
Current

CHG-SW

LED-R

LED-G

Low voltage
detecting voltage

OFF

CNT

OFF

Charge
STOP

2mA

ON/OFF 1.28s*

2mA charge

10s*

*C1=0.01

2mA charge

10s*

*C1=0.01

Inactive

Active

Inactive

Over charge battery

Abnormalities in temperature

Battery
Voltage

Charge
Current

CHG-SW

LED-R

LED-G

OFF

CNT

OFF

Charge STOP

Charge
Current

CHG-SW

LED-R

LED-G

OFF

CNT

OFF

Charge STOP

Temperature
Detecting

Over charge detecting

OFF

ON/OFF 1.28s*

*C1=0.01

Inactive

Battery
Voltage

NJW4100

- 17 -

Ver.2005-01-20

OPERATION MATRIX

Parameter

Battery

Un-connecting

Quick

Charge

Pre-

Charge

2mA

Charge

Full

Charge

Temperature

Error

Over

Voltage

Error

Time OUT

LED-G OFF OFF

OFF

ON OFF OFF

OFF

LED-R OFF ON

OFF OFF

BLINKING BLINKING

Tr. OFF

OFF

Charge
Current

- Q-CHG

P-CHG

2mA -

- -

Return

Charge

- -

Re-Charge

Auto

Latch

Timer Stop

Operate

Stop Stop

Stop -

Temperature

Detecting

Disregard Operate

Operate

Operate Operate

Over

Voltage

Detecting

Disregard Operate

Operate

Operate Operate

Operate

CHG-SW Stay

Operate

Re-start

Battery
Setting

Stay Operate

Operate

Operate Re-start

Re-start

Full Charge

Detecting

Disregard Operate

Operate Disregard

Disregard Disregard

Disregard

Disregard: Detection function is not reflected in control although it is operating.

LED ON/OFF PATTERN

*Available upon request.

NJW4100 NJW4101* NJW4102* NJW4103*

Parameter

LED-R

LED-G

LED-R

LED-G

LED-R

LED-G

LED-R

LED-G

Adaptor Voltage
Detecting

OFF OFF OFF OFF

OFF

Charging

OFF

BLINKING

Full Charging

OFF

Temperature Error

OFF OFF

BLINKING

OFF OFF OFF

BLINKING

OFF

Over Voltage Detecting

BLINKING

OFF

BLINKING

OFF

BLINKING

OFF

BLINKING

OFF

Time Out

BLINKING

OFF

BLINKING

OFF

BLINKING

OFF

BLINKING

OFF

NJW4100

- 18 -

Ver.2005-01-20

The example of application

Specification
Input Voltage

:more than 5V

Charge Battery

:Lithium-ion Battery 1cell

Charge Control Voltage

:4.2V

Quick Charge Start Voltage

:3.07V

Pre-Charge Current

:100mA

Re-Charge Detection Voltage

:3.99V

Quick Charge Current

:750mA

Over Voltage Detection Voltage

:4.305V

Full Charge Current

:60mA

Charge Temperature Range : 0

C~45

C (

thermistor

:10k, B value 3435)

The example of application circuit

P-CHG

NFB

CNT

GND

F-CHG

LED-G

LED-R

C2 CHG-SW

TDET

VREF

CS2

CS1

Q-CHG

SBD

LED2

Green

BATT+

LED1

Red

0.01

0.1

THL

22k

TDET

15k

24k

15k

TDET

BATT-

REF

0 (Short)

Open

0.2 1/2W

IC NJW4100

1,000pF

130k

120k

REF

110k

7.5k

110k

9.1k

2.2k

910

390

10k

GND

OUT

Option

Q1 :

2SA1244

(Toshiba)

SBD

: EC30LA02

(Nihon Inter)

RL1632R-R200-F

(Susumu)

MVS16VC47MF46 (Nippon

chemi-con)

Ð­Ð»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: NJW4100M

ÐÐ»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: NJW4100M