STC3115IJT is Low-power single-cell Li-ion fuel gauge IC with I2C interface for wearables and miniature IoT devices
Specifications
Manufacturer:
STMicroelectronics
Product Number:
STC3115IJT
Description:
IC BATT GAS GAUGE LI-ION 10CSP
Highlight:
low-power Li-ion fuel gauge IC
,single-cell fuel gauge IC for wearables
,I2C interface fuel gauge IC
Introduction
STC3115IJT - Low-power Single-cell Li-ion Fuel Gauge IC
Core Functions
The STC3115IJT is a low-power battery gas gauge IC developed by STMicroelectronics for single-cell Li-ion and Li-polymer batteries, which accurately tracks battery state of charge without complex factory calibration.
- Dual Fuel Gauge Measurement Technology: Combines coulomb counter and voltage monitoring algorithms. The integrated sense amplifier captures charge and discharge current, while cell voltage sampling corrects accumulated coulomb counting errors to deliver precise SoC values.
- Low Power Consumption Design: Operating supply current is only several microamps, with a standby mode featuring nanoampere quiescent current to minimize power loss during system sleep, significantly extending battery standby time.
- Built-in Battery Parameter Storage: On-chip non-volatile memory stores battery characteristic parameters including rated capacity, aging coefficients, and temperature compensation data, retaining information after power-off.
- I2C Communication Interface: Standard I2C two-wire bus communicates with main MCU. The host can read real-time SoC, battery voltage, current, chip temperature, and modify configuration registers.
- Multiple Built-in Protection Detection: Monitors battery overvoltage, undervoltage, and abnormal current. Outputs flag bits to alert the MCU of battery risks, cooperating with external charger and load switches to implement battery safety control.
- Small Package Form Factor: Supplied in tiny SOT-23-5 package, occupying minimal PCB space, ideal for compact portable electronic products with limited layout area.
Typical Applications
- Wearable consumer electronics: smart bands, smart watches, wireless Bluetooth earbuds, portable health monitors
- Low-power IoT wireless equipment: BLE sensor nodes, asset tracking tags, miniature environmental sensors
- Handheld portable devices: wireless remote controllers, portable Bluetooth speakers, digital hearing aids
- Miniature medical devices: portable blood glucose meters, wearable pulse oximeters
- Small single-cell lithium battery packs for compact handheld consumer gadgets
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