Overview
The STC3115AIQT, produced by STMicroelectronics, is a gas gauge IC designed for battery monitoring in handheld applications. It incorporates advanced features such as current sensing, Coulomb counting, and accurate battery voltage measurements to estimate the state-of-charge (SOC) of the battery. The device includes an internal temperature sensor for temperature compensation and an alarm output that signals low SOC conditions or low battery voltage, with programmable alarm threshold levels.
The STC3115AIQT is optimized for low power consumption, operating at 45 µA in power-saving mode and 2 µA in standby mode. It is available in micro-sized packages, including a 1.4 x 2.0 mm 10-bump CSP package and a 2.0 x 3.0 mm DFN10 package.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Supply Voltage (VCC) | 2.7 to 4.5 | V |
| Operating Temperature Range | -40 to 85 | °C |
| Maximum Junction Temperature | 150 | °C |
| Electrostatic Discharge (HBM) | 2 kV | |
| Power Consumption in Power-Saving Mode | 45 µA | |
| Power Consumption in Standby Mode | 2 µA | |
| Battery Voltage Measurement Accuracy | ±0.25% | |
| Internal Temperature Sensor Accuracy | ±3 °C | |
| Package Dimensions | 1.4 x 2.0 mm (CSP), 2.0 x 3.0 mm (DFN10) |
Key Features
- OptimGauge™ algorithm for accurate state-of-charge estimation
- 0.25% accuracy battery voltage monitoring
- Coulomb counter and voltage-mode gas gauge operations
- Robust initial open-circuit-voltage (OCV) measurement at power-up
- Programmable low battery alarm
- Internal temperature sensor for temperature compensation
- Battery swap detection
- Low power consumption: 45 µA in power-saving mode, 2 µA in standby mode
- Micro-sized packages: 1.4 x 2.0 mm CSP and 2.0 x 3.0 mm DFN10
Applications
- Mobile phones
- Multimedia players
- Digital cameras
- Portable medical equipment
Q & A
- What is the primary function of the STC3115AIQT?
The primary function of the STC3115AIQT is to monitor the state-of-charge (SOC) of a battery using current sensing, Coulomb counting, and accurate battery voltage measurements.
- What are the operating temperature ranges for the STC3115AIQT?
The operating temperature range for the STC3115AIQT is -40 to 85 °C.
- How accurate is the battery voltage measurement of the STC3115AIQT?
The battery voltage measurement accuracy of the STC3115AIQT is ±0.25%.
- What are the power consumption levels in different modes for the STC3115AIQT?
The STC3115AIQT consumes 45 µA in power-saving mode and 2 µA in standby mode.
- Does the STC3115AIQT have an internal temperature sensor?
Yes, the STC3115AIQT includes an internal temperature sensor for temperature compensation.
- Can the alarm threshold levels of the STC3115AIQT be programmed?
Yes, the alarm threshold levels of the STC3115AIQT are programmable.
- What are the available package options for the STC3115AIQT?
The STC3115AIQT is available in 1.4 x 2.0 mm CSP and 2.0 x 3.0 mm DFN10 packages.
- What is the maximum junction temperature for the STC3115AIQT?
The maximum junction temperature for the STC3115AIQT is 150 °C.
- Does the STC3115AIQT support I²C communication?
Yes, the STC3115AIQT supports I²C communication with a clock frequency up to 400 kHz.
- What is the purpose of the OptimGauge™ algorithm in the STC3115AIQT?
The OptimGauge™ algorithm in the STC3115AIQT is used for accurate state-of-charge estimation of the battery.
