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: Marriage of maths and microalgae a good export

Related Stories

Power to the batteries

18 hours ago

Better solar panels and wind turbines are important to helping ensure a low-carbon future. But they are not enough. The energy from these intermittent sources must be stored, managed, converted and accessed ...

Hycopter stores energy in form of hydrogen, not air

May 20, 2015

Singapore-based Horizon Unmanned Systems (HUS) this month introduced the hycopter, which they said is the world's first hydrogen fuel cell-powered multi-rotor UAV. It uses refillable hydrogen tubes as part ...

GoSun solar grill offers a greener way to barbecue

May 05, 2015

A group led by inventor Patrick Sherwin has posted a Kickstarter project named GoSun Grill, it uses sunlight to charge a thermal battery which in turn is used to cook food inside a glass vacuum tube. The dif ...

CLAIRE brings electron microscopy to soft materials

May 14, 2015

Soft matter encompasses a broad swath of materials, including liquids, polymers, gels, foam and - most importantly - biomolecules. At the heart of soft materials, governing their overall properties and capabilities, ...

Recommended for you

Robot swarms use collective cognition to perform tasks

43 minutes ago

The COCORO project's robot swarms not only look like schools of fish, they behave like them too. The project developed autonomous robots that interact with each other and exchange information, resulting in ...

Slow start, gradual improvement for US Internet gambling

2 hours ago

Internet gambling is off to a slow start in the United States, with banks hesitant to handle credit card payments for online bets and some politicians and casino moguls pushing to ban it, but there remains potential for great ...

Jawbone files lawsuit against rival Fitbit

2 hours ago

In a clash of rival makers of fitness trackers, Jawbone is suing Fitbit and a group of employees who quit Jawbone to work for Fitbit, saying they stole trade secrets, business plans, market research, and other information.

Samsung details a dual-OS phone-docking hybrid device

10 hours ago

What's this? A dual operating system hybrid device? The U.S. Patent & Trademark Office this month revealed a patent application from Samsung Electronics, titled "Electronic Apparatus, Docking Apparatus, ...

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.