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SMB239 Datasheet(PDF) 13 Page - Summit Microelectronics, Inc.

No. de pieza SMB239
Descripción Electrónicos  Programmable Linear Battery Charger in 1.3 x 2.1 uCSP
PDF  30 Pages
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Fabricante Electrónico  SUMMIT [Summit Microelectronics, Inc.]
Página de inicio  http://www.summitmicro.com
Logo SUMMIT - Summit Microelectronics, Inc.

SMB239 Datasheet(HTML) 13 Page - Summit Microelectronics, Inc.

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SMB239
Summit Microelectronics, Inc
2129 3.0 2/23/2009
13
As the temperature changes, the resistance of the
thermistor changes creating a voltage proportional to
temperature. The temperature coefficient or Beta (
Β) of
the thermistor must be as close to 4400 as possible to
achieve the maximum temperature accuracy.
NTC THERMISTOR
RESISTANCE
10K
24.9K
25K
61.9K
100K
249K
Table 1: NTC values and associated parallel
resistances.
Internal Thermal Protection
When the die temperature of the SMB239 reaches
approximately 110°C, charge current will be reduced to
prevent further die heating.
This internal thermal
protection circuit helps to improve device (and
consequently, system) reliability.
APPLICATIONS INFORMATION (CONTINUED)



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