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SS4035G Datasheet(PDF) 7 Page - Silicon Standard Corp.

Part # SS4035G
Description  Two-Cell Li-Ion and Li-Polymer Charge Management IC
PDF  11 Pages
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Manufacturer  SSC [Silicon Standard Corp.]
Direct Link  http://www.siliconstandard.com
Logo SSC - Silicon Standard Corp.

SS4035G Datasheet(HTML) 7 Page - Silicon Standard Corp.

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SS4035G
1/09/2006 Rev.3.01
CURRENT AND TEMPERATURE SENSING
6.8k
Ω
AVDD
16
CCTL
5
VDD
13
TESTIN
3
CLED
1
TESTOUT
4
CFLED
2
V2
12
S3
15
BA2
18
S2
20
V1
11
S1
19
BA1
17
RES
7
FC
6
ROSC
14
T
9
GND
8
I
10
SS4035G
50m
Ω
VDD
VDD
10k
Ω
Figure 3 shows the current sense and temperature
sensor. When a 103AT thermistor and a 6.8k resistor
detect circuit. The SS4035G monitors the charging
are used as recommended, the maximumum
current by sensing at pin I (10) the voltage drop
temperature, high temperature, resume temperature,
across a small resistor, connected between VSS
low temperature and minimum temperature are
(battery negative) and GND (charger ground). The
60°C, 50°C, 45°C, 5°C and 10°C respectively. The
value of this resistor should be between 50m
Ω
value of the resistor must be changed if a different
and 150m
Ω. To detect the temperature, a negative
thermistor is used. To disable temperature sensing,
temperature coefficient thermistor is used as a .
pin T (9) must be connected to VDD.
CELL VOLTAGE DETECTION AND BALANCING CONTROL
10k
Ω
10k
Ω
P-channel
MOSFET
NPN
NPN
AVDD
16
CCTL
5
VDD
13
TESTIN
3
CLED
1
TESTOUT
4
CFLED
2
V2
12
S3
15
BA2
18
S2
20
V1
11
S1
19
BA1
17
RES
7
FC
6
ROSC
14
T
9
GND
8
I
10
SS4035G
Rb
Rb
470k
Ω
R13 51k
Ω
51k
Ω
R14
51k
Ω
VDD
Figure 4 shows the cell voltage detection and cell
guarantees that the input voltage on pin V2 (12) will
balancing circuit. The pack voltage is divided by two
not exceed VDD. When the cell voltage is above the
(by using equal value resistors, R13 and R14). This
“Balancing Threshold”, balance control is activated.
Figure 4. Voltage Sense and Balancing Control
Figure 3. Current Sense and Temperature Sensor
103AT
P-channel
MOSFET
470k
Ω



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