STC3100 Datasheet, PDF (1/21 Pages) STMicroelectronics – Battery monitor IC with Coulomb counter/gas gauge

STC3100
Battery monitor IC with Coulomb counter/gas gauge
Features
■ Battery voltage monitoring
■ Internal temperature sensor
■ Coulomb counter with 12/14-bit AD converter,
+/- 80 mV input voltage range
■ Internal or external 32768 Hz time base
■ I2C interface for gas gauge monitoring and
device control
■ 32-RAM bytes
■ 8-byte unique device ID
■ One general-purpose I/O
Applications
■ Cellular phones, PDA, MP3 players, cordless
phones
■ Digital cameras, USB appliances, Bluetooth
devices
Description
The STC3100 monitors the critical parameters of
a single-cell Li-Ion battery (voltage, temperature
and current) and includes hardware functions to
implement a gas gauge for battery charge
monitoring, based on a programmable 12- to
14-bit A/D converter. With a typical 30 milliOhms
external sense resistor, the battery current can be
up to 2.5 A and the accumulator system provides
a capacity up to +/-7000 mAh with a resolution of
0.2 mAh.
The device is programmable through the I2C
interface.
MiniSO-8
(Plastic micropackage)
DFN8 3x3
(Plastic micropackage)
Pin connections
(top view)
IO0 ¹
ROSC ²
SDA ³
SCL ⁴
8 _VIN
7 _VCC
6 _CG
5 _GND
January 2009
Rev 1
1/21
www.st.com
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