Battery Charge Management, New and Emerging Trends

Focus:

Handheld products such as cell phones, portable media players, GPSs, and Bluetooth headsets require the designer to implement battery charging so as to balance requirements for user convenience and experience, total charge time and cost. This article discusses trends in charge management techniques and their applications. It discusses the advantages of switch-mode charging versus linear charging, and presents a 3-MHz switch-mode charger based on TI's bq24150/1 as an example of compact switch-mode design. Wireless battery charging is discussed including why older techniques used to charge electric toothbrushes are inadequate for devices such as cell phones; an example of a new wireless battery charging technology called eCoupled technology is described. Applications requirements for USB battery charging are discussed and an example of a USB-compliant battery charger based on TI's bq24073 is presented. Article concludes with a 3-paragraph summary of the requirements for charging Li-ion batteries.

What you’ll learn:

• How to understand what options are available for charging batteries in handheld electronic devices
• How to understand what the trends are in battery charging for handheld electronic devices

Notes:

Article appears on pages 20-23 of January issue in article archive. You must register to access articles in this magazine's archive.

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Author & Publication:

Masoud Beheshti, Texas Instruments Incorporated, Bodo's Power Systems, Jan 01 2009

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