NJW4108
Lithium-ion Battery Charger Controller IC with Timer
■GENERAL
DESCRIPTION
The
NJW4108
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.
■PACKAGE
OUTLINE
NJW4108V
■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
NJW4108V : SSOP20
■PIN
CONFIGURATION
P-CHG
NFB
CNT
GND
NC
F-CHG
LED-G
LED-R
C1
C2
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
Q-CHG
CS1
CS2
VS
VREF
V
+
TDET
TH
TL
CHG-SW
NJW4108V
Ver.2013-02-12
-1-
NJW4108
■ABSOLUTE
MAXIMUM RATINGS (Ta=25°C)
PARAMETER
SYMBOL
Operating Voltage
V
+
C1 Pin Voltage
V
C1
C2 Pin Voltage
V
C2
TDET Pin Voltage
V
TDET
CNT Pin Output Current
I
SINK-CNT
LED-G Pin Output Current
I
SINK-G
LED-R Pin Output Current
I
SINK-R
Power Dissipation
P
D
Operating Temperature Range
T
OPR
Storage Temperature Range
T
STG
MAXIMUM RATINGS
+15
+5
+5
+5
50
20
20
SSOP20 :300
-20 ~ +85
-40 ~ +125
UNIT
V
V
V
V
mA
mA
mA
mW
°C
°C
■ELECTRICAL
CHARACTERISTICS (V
+
=5V, Ta=25°C)
PARAMETER
General Characteristics
Operating Voltage
Operating Current
Under Voltage Lockout Block
ON Threshold Voltage
OFF Threshold Voltage
Hysteresis Voltage
Reference Voltage Block
Reference Voltage
Load Regulation
Voltage Detection Block
Quick Charge Detection Voltage
Re-Charge Detection Voltage
Over Voltage Detection Voltage
Charge Control Block
Reference Voltage
VS Pin Input Bias Current
Battery Connected
Detection Voltage
V
Q-CHG
V
R-CHG
V
OV
V
REF-CV
I
VS
V
T-TDET
VS: L→H
VS: H→L
VS: L→H
VS Pin
VS=4.2V
TDET Pin
V
BAT
V
BAT
V
BAT
x 0.71 x 0.73 x 0.75
V
BAT
V
BAT
V
BAT
x 0.94 x 0.95 x 0.96
V
BAT
V
BAT
V
BAT
x 1.015 x 1.025 x 1.035
4.17
–
–
4.2
50
1.15
4.23
500
–
V
V
V
V
nA
V
SYMBOL
TEST CONDITION
MIN.
TYP.
MAX.
UNIT
V
OP
I
CC
CHG-SW: OPEN
–
–
–
2
14
3
V
mA
V
T-ON
V
T-OFF
V
HYS
2.2
2.0
100
2.4
2.2
200
2.6
2.4
300
V
V
mV
V
REF
∆V
REF
I
REF
=0mA
I
REF
=0mA~1mA
1.228
–
1.24
–
1.253
10
V
mV
Low Voltage Detection (2mA Charge) Block
Charge Current
I
CHG1
Low Voltage Detection Voltage
V
LV
VS=1V
VS: L→H
1
2
3
V
BAT
V
BAT
V
BAT
x 0.455 x 0.475 x 0.495
mA
V
-2-
Ver.2013-02-12
NJW4108
■ELECTRICAL
CHARACTERISTICS (V
+
=5V, Ta=25°C)
PARAMETER
Current Detection Block
Pre-Charge /Quick Charge Block
Voltage Gain
Full Charge Block Voltage Gain
F-CHG Pin Input Voltage Range
CS1 Pin Input Bias Current
CS2 Pin Input Bias Current
Output Block
CNT Pin Saturation Voltage
CNT Pin Leak Current
Temperature Detection Block
Abnormal Temperature
LED Blinking
LED Out Block
LED-G Pin Saturation Voltage
LED-G Pin Leak Current
LED-R Pin Saturation Voltage
LED-R Pin Leak Current
Timer Block
OSC1 Timer Error Time
OSC2 Timer Error Time
CHG-SW Block
ON Threshold Voltage
OFF Threshold Voltage
Pull-up Resistance
SYMBOL
TEST CONDITION
MIN.
TYP.
MAX.
UNIT
A
V1
A
V2
V
F-CHG
I
CS1
I
CS2
CS1=3.8V, CS2=3.6V
CS2=VS=4.2V, V
F-CHG
=96mV
CS2=VS=4.2V
CS1=4.2V
CS2=4.2V
11.5
15.5
48
–
–
12
18
–
10
10
12.5
21
–
500
500
dB
dB
mV
nA
nA
V
OL-CNT
I
SINK
=20mA
I
LEAK-CNT
V
+
=14V
–
–
0.2
–
0.5
1
V
µA
T
BLINK-G
V
TL
>V
TDET
, V
TDET
<V
TH
,T=4µs
0.512
1.024
2.048
ms
V
OL-G
I
LEAK-G
V
OL-R
I
LEAK-R
I
SINK
=10mA
V
+
=14V
I
SINK
=10mA
V
+
=14V
–
–
–
–
0.2
–
0.2
–
0.5
1
0.5
1
V
µA
V
µA
∆T1
∆T2
C1=C2=0.01µF external
Not including external deviation
-10
-10
–
–
+10
+10
%
%
V
SW-ON
V
SW-OFF
R
PULL-UP
–
1
300
–
–
500
0.25
–
700
V
V
kΩ
Ver.2013-02-12
-3-
NJW4108
■TYPICAL
APPLICATION
Input
V
REF
CS2
R
P1
R
P2
V
+
R
Q1
R
Q2
Q-CHG
NFB
P-CHG
Quick Charge
Control
Pre-Charge
Control
CNT
12dB
CS1
CS2
R
B1
Rcs
V
REF
Reference
Voltage 1
1.24V
V
REF1
CVCC-ON
Reference
Voltage 2
4.2V
V
REF2
CVCC-ON
V
REF2
VS
R
B2
Full Charge
Detection
Quick Charge
Re-Charge
When is
１-cell、
R
B1
：Short
R
B2
：Open
V
REF
GND
CVCC-ON
CS1 pin
Quick/
Pre-Charge
Charge
ON/OFF
2mA
Charge
CLK
OSC
1
Pre-
Charge
Timer
Start/Stop
Time Out
Battery
Voltage
Detection
F-CHG
6dB
R
F1
R
F2
V
BAT
x 0.73
V
BAT
x 0.95
Over Voltage
Detection
Low Voltage
Detection
V
BAT
x 1.025
V
REF
C1
V
BAT
x 0.475
C2
OSC
2
Full
Charge
Timer
Start/Stop
Time Out
Temp.
Detection
Low Temperature
Detection
High Temperature
Detection
TDET
TH
TL
LED-G
LED-G
Charge
-ON
+
LED-R
V
LED-R
Control
Logic
R
PULL-UP
Battery Connected
Detection
V
+
UVLO
Lithium Ion Battery
GND
CHG-SW
-4-
Ver.2013-02-12
NJW4108
■PIN
CONFIGULATION
Pin No.
Pin Name
1
P-CHG
2
NFB
3
CNT
4
GND
5
NC
6
F-CHG
7
LED-G
8
LED-R
9
C1
10
C2
11
CHG-SW
12
TL
13
TH
14
TDET
15
V
+
16
VREF
17
VS
18
CS2
19
CS1
20
Q-CHG
Function
Pre-Charge Current Setting
Current-Regulation-Loop Compensation
Charge Control for Output Pin (External PNP Transistor)
GND
Full Charge Current Setting
LED Output
LED Output
Pre-Charge Timer, 2mA Charge Timer, LED Blinking Cycle, Delay Time Setting
Quick Timer Setting
Charge ON/OFF Control
Batteries Thermal (High Temperature) Setting
Batteries Thermal (Low Temperature) Setting
Battery Temperature Detection, Battery Connected Detection
Operating Voltage
Reference Voltage Output
Battery Voltage Detection
Charge Current Detection 2
Charge Current Detection 1
Quick Charge Current Setting
■CHARGE
VOLTAGE / CURRENT for RESISTANCE SETTING
Parameter
Calculation formula
Charge Control Voltage
Low Voltage Detection Voltage
Quick Charge Start Voltage
Re-Charge Detection Voltage
Over Voltage Detection Voltage
Pre-Charge Current
Quick Charge Current
Full Charge Current
I
P-CHG
= (
V
BAT
=
R
B1
+
R
B2
x V
REF-CV (4.2V)
R
B2
Examples of calculation
4.2V
2.00V
3.07V
3.99V
4.305V
100mA
750mA
60mA
8.4V
3.99V
6.13V
7.98V
8.61V
V
BAT
x 0.475
V
BAT
x 0.73
V
BAT
x 0.95
V
BAT
x 1.025
R
P2
x V
REF (1.24V)
/ 4) / R
CS
R
P1
+
R
P2
(at. R
P1
:232k
Ω
, R
P2
:16k
Ω
, R
CS
=0.2
Ω
)
R
Q2
I
Q-CHG
= (
x V
REF (1.24V)
/ 4) / R
CS
R
Q1
+
R
Q2
(at. R
Q1
:128k
Ω
, R
Q2
:120k
Ω
, R
CS
=0.2
Ω
)
R
F2
I
F-CHG
= (
x V
REF (1.24V)
/ 8) / R
CS
R
F1
+
R
F2
(at. R
F1
:114.4k
Ω
, R
F2
:9.6k
Ω
, R
CS
=0.2
Ω
)
Ver.2013-02-12
-5-
京公网安备 11010802033920号
EEWORLD
