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LM3647 Datasheet(PDF) 16 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # LM3647
Description  Universal Battery Charger for Li-Ion, Ni-MH and Ni-Cd Batteries
PDF  17 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM3647 Datasheet(HTML) 16 Page - National Semiconductor (TI)

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4.5 Recommended dimensioning for the NTC
The voltage at TEMP-input must be between 2.2V and 0.5V
for the charger to start. While charging the voltage, must stay
between 3.0V (maximum temperature) for Li-Ion, or 3.15V
(maximum temperature) for Ni-Cd/Ni-MH, and 0.5V (mini-
mum temperature) or the charger will register a temperature
fault and abort the charge. These voltages correspond to the
upper and lower limits for the battery pack temperature.
When no NTC is used the TEMP-input pin must be biased to
a voltage level between 2.2V and 0.5V.
Typical configuration curve, (NTC characteristics: 3k
Ω @ 25°C, β=3988:
0
0.5
1
1.5
2
2.5
3
3.5
-10
-5
0
5
10
15
20
25
30
35
40
45
50
Temperature in °C



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