Svelte Battery Converter/Charger Snuggles Into Bluetooth Accessories

April 28, 2005
Imagine designing a converter/charger with an integrated power FET for lithium-ion or lithium-polymer cells in Bluetooth headsets and accessories. Then, try making it work from either an ac adapter or USB cable without user intervention. Next, have it

Imagine designing a converter/charger with an integrated power FET for lithium-ion or lithium-polymer cells in Bluetooth headsets and accessories. Then, try making it work from either an ac adapter or USB cable without user intervention. Next, have it multitask by regulating the battery voltage when there's no external supply. And, squeeze it into a 3.5- by 4.5-mm QFN package.

Then again, you can try Texas Instruments' bq2501x family. Two versions have fixed 3.3- or 1.8-V outputs. The third version's output is adjustable between 0.7 and 4.2 V. Powered by an ac adapter, they'll deliver up to 500 mA. With USB, current is limited to 100 or 500 mA.

Pricing is $2.20 each in 1000-unit quantities.

Texas Instrumentswww.ti.com

Sponsored Recommendations

Highly Integrated 20A Digital Power Module for High Current Applications

March 20, 2024
Renesas latest power module delivers the highest efficiency (up to 94% peak) and fast time-to-market solution in an extremely small footprint. The RRM12120 is ideal for space...

Empowering Innovation: Your Power Partner for Tomorrow's Challenges

March 20, 2024
Discover how innovation, quality, and reliability are embedded into every aspect of Renesas' power products.

Article: Meeting the challenges of power conversion in e-bikes

March 18, 2024
Managing electrical noise in a compact and lightweight vehicle is a perpetual obstacle

Power modules provide high-efficiency conversion between 400V and 800V systems for electric vehicles

March 18, 2024
Porsche, Hyundai and GMC all are converting 400 – 800V today in very different ways. Learn more about how power modules stack up to these discrete designs.

Comments

To join the conversation, and become an exclusive member of Electronic Design, create an account today!