First Synchronous, Switch-Mode Battery Charge Integrated Circuit (IC) with Internal Power FETs

Jul 12, 2004
TI - chip

Solving the design challenge to efficiently deliver higher battery charge current in small portable applications, Texas Instruments Incorporated (TI) (NYSE: TXN) announced the first synchronous, switch-mode battery charge integrated circuit (IC) with internal power FETs capable of supplying up to 2 A of charge current. The new battery management IC enables higher charge current while reducing the amount of heat generated, making it ideal for use in systems that incorporate one-, two- and three-series cell lithium-ion (Li-Ion) or lithium-polymer (Li-Poly) battery packs, such as portable DVD and media players, smart handhelds, medical, industrial and other portable equipment

TI's bq24100 battery charge IC, which comes in a small 3.5 mm x 4.5 mm QFN package, operates at a fixed frequency of 1.1 MHz from an input voltage up to 16 V. The new IC delivers high accuracy current and voltage regulation for precise battery charging, multiple charge status outputs for charge progress indication and automatic battery full charge detection and charge termination.

Providing safe and reliable charging of Li-Ion or Li-Polymer batteries, the bq24100 device charges in three phases: a low current conditioning phase for deeply discharged batteries, a fast charge constant current phase delivering up to 2 A and a constant voltage phase. In this final phase, the device terminates charge based on a minimum current level. A programmable charge timer provides a safety backup for termination. Separate versions of the IC also allow the portable system's micro-controller to control the battery charging profile and termination with digital inputs to the IC. The bq24100 automatically re-starts the charge if the battery voltage falls below a specific threshold.

As with other TI battery charge management devices, including the popular bqTINYTM family of linear control charge ICs, the new bq24100 integrates reverse-blocking protection to prevent battery drainage through the IC in the absence of the input charging supply.


Key Specifications of the bq24100:

Integrated Synchronous, 1.1 MHz Fixed-Frequency PWM Controller
Integrated PowerFETs for up to 2 A Charge Rate
High Accuracy Voltage and Current Regulation
Offered in Standalone (Built-in Charge Management and Control) and System-Controlled Versions
Status Outputs for LED or Host Processor Interface
20 V Input Voltage Rating
High-Side Current Sensing
Battery Temperature Monitoring
Automatic Sleep Mode for Low Power Consumption

More information: www.ti.com/

Explore further: Pinterest buys startup with image organizing skills

add to favorites email to friend print save as pdf

Related Stories

The race is on to power the next generation of electric cars

Jul 16, 2014

A major shift from gasoline-powered to affordable electric vehicles feels tantalizingly close, but the battery technology that could make it happen still needs to catch up to its own hype. Although luxury-car maker Tesla ...

The powerful potential of microgrids for livable cities

Jul 08, 2014

A majority of the world's population now lives in cities, which consume 75 percent of the world's resources and emit most of its greenhouse gases. The United Nations estimates that by 2050, an additional ...

Engineering researchers develop next-generation battery

Jul 07, 2014

(Phys.org) —A research team from the University of Alberta has used carbon nanomaterials to develop next-generation batteries capable of charging faster and lasting longer than today's standard lithium-ion ...

A plug fit for every car

Jul 04, 2014

If you can't find a charging cable for your cell phone, it's an inconvenience. But what if you're away from home and can't find a charging station compatible with your electric vehicle?

Recommended for you

US warns retailers on data-stealing malware

56 minutes ago

US government cybersecurity watchdogs warned retailers Thursday about malware being circulated that allows hackers to get into computer networks and steal customer data.

Android grabs 85% of smartphone market: survey

1 hour ago

Smartphones powered by the Android operating system captured 85 percent of the worldwide market in the second quarter, threatening to marginalize rival platforms, a new survey shows.

Irish bookmaker apologizes for 2010 data breach

1 hour ago

(AP)—Irish betting company Paddy Power announced Thursday it is notifying hundreds of thousands of customers that most of their profile information was stolen in 2010, but hackers did not gain their credit card details ...

User comments : 0