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STC3105 Arkusz danych(PDF) 1 Page - STMicroelectronics |
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STC3105 Arkusz danych(HTML) 1 Page - STMicroelectronics |
1 / 23 page 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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