Overview
The STC3100IQT, produced by STMicroelectronics, is a battery monitor IC designed to monitor the critical parameters of a single-cell Li-Ion battery. It includes hardware functions to implement a gas gauge for battery charge monitoring, utilizing a programmable 12- to 14-bit A/D converter. The device can measure battery voltage, temperature, and current, and it supports an internal or external 32768 Hz time base. The STC3100IQT is programmable through an I2C interface, making it versatile for various battery management applications.
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 |
| Electrostatic Discharge (HBM) | 2 kV | |
| AD Converter Resolution | 12 to 14 bits | |
| AD Converter Input Voltage Range | +/- 80 mV | |
| Internal Time Base Frequency | 32768 Hz | |
| Gas Gauge Accuracy (Internal Time Base) | 3.5% | |
| Gas Gauge Accuracy (External Time Base) | 1% | |
| Battery Voltage Measurement Accuracy | -0.5% to +0.5% | |
| Internal Temperature Sensor Accuracy | -3°C to +3°C |
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
- Internal or external 32768 Hz time base
- One general-purpose I/O line
- 8-byte unique device ID
- 32 bytes of general-purpose RAM
Applications
- Cellular phones
- PDA, MP3 players, cordless phones
- Digital cameras, USB appliances, Bluetooth devices
- Other portable electronic devices requiring precise battery management
Q & A
- What is the primary function of the STC3100IQT?
The primary function of the STC3100IQT is to monitor the critical parameters of a single-cell Li-Ion battery, including voltage, temperature, and current, and to implement a gas gauge for battery charge monitoring.
- What is the resolution of the AD converter in the STC3100IQT?
The AD converter in the STC3100IQT has a programmable resolution of 12 to 14 bits.
- What is the operating temperature range of the STC3100IQT?
The operating temperature range of the STC3100IQT is -40°C to 85°C.
- How does the STC3100IQT communicate with other devices?
The STC3100IQT communicates through an I2C interface.
- What is the purpose of the internal temperature sensor in the STC3100IQT?
The internal temperature sensor monitors the temperature of the battery, which is crucial for accurate battery management.
- Can the STC3100IQT use an external time base?
- What is the gas gauge accuracy of the STC3100IQT?
The gas gauge accuracy of the STC3100IQT is 3.5% when using the internal time base and 1% when using an external time base.
- Does the STC3100IQT have any general-purpose I/O lines?
- How much RAM does the STC3100IQT have?
The STC3100IQT has 32 bytes of general-purpose RAM.
- Is the STC3100IQT RoHS compliant?
