Versatile Li-Ion Battery Charger Chip from STMicroelectronics Saves Space for Compact Applications

Integrated programmable charger system is ideal for both sophisticated and low-cost portable products

GENEVA, March 17 /PRNewswire-FirstCall/ -- STMicroelectronics (NYSE: STM) today announced an advanced new Li-Ion battery charger chip -- the L6924D -- which integrates all of the required power elements, plus other functions, into a very small 3 x 3mm package intended for use in mobile phones, PDAs, digital cameras and MP3 players. All key charging system parameters are programmable, enabling the L6924D to be used across a full range of low cost as well as more sophisticated applications -- the first battery charger chip to offer such flexibility.

The L6924D is a fully monolithic battery charger designed for single-cell Li-Ion and Li-Polymer battery packs. The ideal solution for space-limited portable products it is produced with ST's robust BCD6 smart power technology and integrates the Power MOSFET, reverse blocking diode, sense resistor and thermal protection into a compact VFQFPN16 package.

Designers can choose between Linear and Quasi-Pulse charging modes, depending on the application's requirements. Linear Mode suits applications with low-cost power adapters, such as an external voltage regulated adapter, when the L6924D can charge the battery in a Constant Current/Constant Voltage (CC/CV) profile. Operation in Quasi-Pulse Mode can be used when a current- limited adapter is available, dramatically reducing the power dissipation. Closed loop thermal control protects the device against overheating in either mode.

The L6924D has an operating input voltage range of 2.5V to 12V, making it suitable for use with a wide range of AC adapters. It is also USB compatible, allowing use in popular USB-powered computer peripherals. All the key parameters are programmable, including pre-charge current, pre-charge voltage threshold, fast-charge current, the end-of-charge current threshold and the charging time.

In addition its default charging parameters allow easy use in compact applications, with few external components, when full flexibility is not required; until now, different devices were required to cover simple and sophisticated applications. The L6924D provides two open collector outputs for diagnostic purposes, such as driving external LEDs or communicating with a host microcontroller, plus flexible control of charge process termination, Gas Gauge capability, and battery presence and temperature monitoring.

These features are increasingly important as the performance expectations -- including the lifespan of the battery itself as well as the time between charges -- for batteries in portable applications increase, to ensure that optimum battery charge conditions are maintained.

The L6924D battery charger is in volume production now and is available in the VFQFPN16 package priced at $0.90 in quantities of 10,000 units.

Further information is available at

This press release is also available at ... with links to further information on the L6924D

About ST's Microcontroller, Linear & Discrete Group

STMicroelectronics is a world leader in offering complete system solutions that leverage its rich portfolio of Microcontroller, Linear, and Discrete products, advanced process and design technologies, and applications expertise. This emphasis on solutions allows the Company to minimize time-to- market for all customers worldwide in existing and emerging applications.

About STMicroelectronics

STMicroelectronics is a global leader in developing and delivering semiconductor solutions across the spectrum of microelectronics applications. An unrivalled combination of silicon and system expertise, manufacturing strength, Intellectual Property (IP) portfolio and strategic partners positions the Company at the forefront of System-on-Chip (SoC) technology and its products play a key role in enabling today's convergence markets. The Company's shares are traded on the New York Stock Exchange, on Euronext Paris and on the Milan Stock Exchange. In 2005, the Company's net revenues were $8.88 billion and net earnings were $266 million. Further information on ST can be found at

CONTACT: Michael Markowitz of STMicroelectronics, +1-212-821-8959,
Email Contact

Web site:

Review Article Be the first to review this article
Downstream : Solutuions for Post processing PCB Designs


Featured Video
Peggy AycinenaWhat Would Joe Do?
by Peggy Aycinena
Blue Pearl: Best kept Secret in EDA
More Editorial  
FPGA Engineer for Teradyne Inc at San Jose, CA
Analog Hardware Engineer for Teradyne Inc at San Jose, CA
Technical Support Engineer EU/Germany/UK for EDA Careers at N/A, United Kingdom
Field Application Engineer for Teradyne Inc at San Jose, CA
Senior Front-End RTL Design AE for EDA Careers at San Jose, CA
Senior R&D Engineer...Timing Closure Specialist for EDA Careers at San Jose or Anywhere, CA
Upcoming Events
CODES+ISSS 2017, Oct 15-20, 2017, Lotte Hotel, Seoul, South Korea at Lotte Hotel Seoul Korea (North) - Oct 15 - 20, 2017
DVCon 2017 Europe, Oct 16 - 17, 2017, Munich, Germany at Holiday Inn Munich City Centre Munich Germany - Oct 16 - 17, 2017
11th International Symposium on Networks-on-Chip (NOCS 2017) at Seoul Korea (South) - Oct 19 - 20, 2017
Verific: SystemVerilog & VHDL Parsers
TrueCircuits: UltraPLL

Internet Business Systems © 2017 Internet Business Systems, Inc.
25 North 14th Steet, Suite 710, San Jose, CA 95112
+1 (408) 882-6554 — Contact Us, or visit our other sites:
AECCafe - Architectural Design and Engineering TechJobsCafe - Technical Jobs and Resumes GISCafe - Geographical Information Services  MCADCafe - Mechanical Design and Engineering ShareCG - Share Computer Graphic (CG) Animation, 3D Art and 3D Models
  Privacy PolicyAdvertise