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STC3105 Arkusz danych(PDF) 1 Page - STMicroelectronics

Numer części STC3105
Szczegółowy opis  Battery monitor IC with alarm output for gas gauge applications
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Producent  STMICROELECTRONICS [STMicroelectronics]
Strona internetowa  http://www.st.com
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STC3105 Arkusz danych(HTML) 1 Page - STMicroelectronics

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September 2011
Doc ID 022198 Rev 1
1/23
23
STC3105
Battery monitor IC with alarm output for gas gauge applications
Features
0.5% accuracy battery voltage monitoring
Low battery alarm output with programmable
thresholds
Low power: 60 µA in power-saving mode, 2 µA
max in standby mode
Ideal for implementation of robust gas gauge
systems using open-circuit voltage and
coulomb counter methods
Small 3x2 mm package
Applications
Mobile phones, multimedia players, digital
cameras
Portable medical equipment
Description
The STC3105 battery monitor includes the
hardware functions required to implement a low-
cost gas gauge for battery monitoring. The
STC3105 uses accurate measurements of the
battery voltage to estimate a battery’s state-of-
charge (SOC). It uses a low cost sense resistor to
precisely sense the charge or discharge states,
detect light-load conditions without ambiguity for
voltage measurements, and accurate SOC
calculation. The coulomb counter method is used
for SOC tracking in high-load conditions.
An alarm output signals a low SOC condition, and
can also indicate low battery voltage. The alarm
threshold levels are programmable.
The device is programmable through an I2C
interface.
TDFN8 3x2
(Plastic micropackage)
1
2
3
4
5
6
7
8
ALM
SCL
GND
CG
VIN
SDA
VCC
NC
Pin connections
(top view)
www.st.com


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