Overview
The STC3100IST, produced by STMicroelectronics, is a battery monitor IC designed to monitor the critical parameters of a single-cell Li-Ion battery. It includes features such as voltage, temperature, and current monitoring, along with a Coulomb counter and gas gauge functionality. The device uses a programmable 12- to 14-bit A/D converter and supports an external sense resistor to measure battery current up to 2.5 A. The STC3100IST is programmable through the I2C interface and provides a range of functionalities to ensure accurate battery charge monitoring and management.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Supply Voltage (VCC) | 2.7 to 5.5 | V |
| Input Voltage on Vin | 0 to VCC | V |
| Operating Temperature Range | -40 to 85 | °C |
| Maximum Junction Temperature | 150 | °C |
| AD Converter Resolution | 12- to 14-bit | |
| AD Converter Input Voltage Range | +/- 80 mV | |
| Internal Time Base Frequency | 32768 Hz | |
| Gas Gauge Accuracy | 3.5% (internal time base), 1% (external time base) | |
| Battery Voltage Measurement Accuracy | -0.5% to +0.5% | |
| Internal Temperature Sensor Accuracy | -3 to +3 °C | |
| Package | MiniSO-8, QFN-8L P 0.5 mm | |
| RoHS Compliance Grade | Ecopack3 |
Key Features
- Battery voltage monitoring
- Coulomb counter with 12/14-bit AD converter, +/- 80 mV input voltage range
- Internal temperature sensor
- I2C interface for gas gauge monitoring and device control
- One general-purpose I/O line
- Internal or external 32768 Hz time base
- 32-RAM bytes for storing battery status and other information
- 8-byte unique device ID
Applications
- Cellular phones
- PDA, MP3 players, cordless phones
- Digital cameras
- USB appliances, Bluetooth devices
Q & A
- What is the primary function of the STC3100IST?
The primary function of the STC3100IST is to monitor the critical parameters of a single-cell Li-Ion battery, including voltage, temperature, and current, and to provide gas gauge functionality.
- What is the resolution of the AD converter in the STC3100IST?
The AD converter in the STC3100IST has a resolution of 12 to 14 bits.
- What is the maximum current that can be measured with the STC3100IST?
The STC3100IST can measure battery current up to 2.5 A with a typical 30 milliOhms external sense resistor.
- How does the STC3100IST communicate with other devices?
The STC3100IST communicates through the I2C interface.
- What is the operating temperature range of the STC3100IST?
The operating temperature range of the STC3100IST is -40 to 85 °C.
- Does the STC3100IST have any internal memory?
Yes, the STC3100IST has 32 bytes of RAM for storing battery status and other information.
- How accurate is the gas gauge in the STC3100IST?
The gas gauge accuracy in the STC3100IST is 3.5% when using the internal time base and 1% when using an external time base.
- What types of packages are available for the STC3100IST?
The STC3100IST is available in MiniSO-8 and QFN-8L P 0.5 mm packages.
- Is the STC3100IST RoHS compliant?
Yes, the STC3100IST is RoHS compliant with an Ecopack3 grade.
- What is the purpose of the unique device ID in the STC3100IST?
The unique device ID is used to identify the battery pack or subsystem and also serves as an indicator of RAM integrity.
