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SS6781BCSTR Arkusz danych(PDF) 13 Page - Silicon Standard Corp.

Numer części SS6781BCSTR
Szczegółowy opis  Battery Charge Controller
PDF  20 Pages
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Producent  SSC [Silicon Standard Corp.]
Strona internetowa  http://www.siliconstandard.com
Logo SSC - Silicon Standard Corp.

SS6781BCSTR Arkusz danych(HTML) 13 Page - Silicon Standard Corp.

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01/31/2008 Rev.1.00
www.SiliconStandard.com
13
SS6781B
For SEL3 > (VCC/2) + 0.4V, the suggested divider
resistance of RA and RB for the corresponding
number of battery cells are as below:
TABLE 2
BATTERY
CELLS
RA/RB
RA (K
Ω)
RB (K
Ω)
2~4
2
240
120
3~6
3.3
300
91
4~8
4.9
300
62
5~10
6.4
300
47
6~12
7.8
310
39
8~16
10.8
390
36
For SEL3 < (VCC/2) -0.4V, the suggested divider
resistance of RA and RB for the corresponding
number of battery cells are as below:
TABLE 3
BATTERY
CELLS
RA/RB
RA(K
Ω)
RB (K
Ω)
2
1
240
240
3
2
240
120
4
3
240
80
5
4
300
75
6
5
300
60
8
7
360
51
10
9
360
40
12
11
390
36
16
15
410
27
Battery Temperature Measurement
The
SS6781B employs a negative temperature
coefficient
(NTC)
thermistor
to
measure
the
battery’s temperature. The thermistor is inherently
nonlinear with respect to temperature. To reduce
the effect of nonlinearity, a resistor-divider network
in parallel with the thermistor is recommended. A
typical application circuit is shown in Fig. 18.
VBAT
4
Rx
C7
VCC
Ry
5
VCC
GND
12
VTS
AIC1781B
Fig. 18
Battery Temperature Sense Circuit
with a Negative Temperature Coefficient
(NTC) Thermistor



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