Battery-Monitoring IC from STMicroelectronics Delivers Higher Accuracy and Extra Features for a Better Handheld User Experience

Battery voltage, current and temperature monitor increases features and flexibility by adding user-definable I/O, traceability, and data storage

GENEVA, Sept. 2 /PRNewswire-FirstCall/ -- STMicroelectronics (NYSE: STM), a leading provider of semiconductors for handheld products, has introduced a battery-condition monitoring IC enabling increased accuracy for 'fuel-gauge' style indicators showing the operating time remaining. The device will improve the user experience for owners of products such as mobile handsets, portable navigation devices, digital cameras and personal media players.

The STC3100 battery-monitor IC can be located in the battery pack or in the handheld device, and integrates functions to monitor the battery voltage, current and temperature. It has a built-in Coulomb counter to calculate battery charge, and stores the data at 16-bit resolution for retrieval by the system controller. Access is via an industry-standard I2C interface, enabling the controller to create an accurate graphical representation of remaining battery-operating time.

ST has added several other reasons for designers to choose this chip over competing battery monitors. The device supports extra functionality by providing one external pin for use as a detector input or to drive an LED indicator. Each IC is also pre-programmed with a unique 64-bit identifier, which enables traceability of individual battery packs or subsystems. In addition, 32 bytes of accessible RAM allow storage of battery history or application-related information throughout the lifetime of the battery.

There are also two package options, giving designers the choice of a small-outline MiniSO-8 leaded package or a 1mm-high DFN8 leadless package with 3 x 3mm overall footprint. The STC3100 is in mass production, and available at $1.20 in quantities of 1000 units.

About STMicroelectronics

STMicroelectronics is a global leader serving customers across the spectrum of electronics applications with innovative semiconductor solutions. ST aims to be the undisputed leader in multimedia convergence and power applications leveraging its vast array of technologies, design expertise and combination of intellectual property portfolio, strategic partnerships and manufacturing strength. In 2008, the Company's net revenues were $9.84 billion. Further information on ST can be found at

SOURCE STMicroelectronics

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