Product category:
Power Supply ICs and Controllers
News Release from: Texas Instruments (April 2001-March 2006) | Subject: Bq24721
Edited by the Electronicstalk Editorial
Team on 04 January 2006
Charge controller takes SMBus interface
onboard
An integrated battery charge controller features an SMBus interface for multicell, multichemistry battery packs used in portable applications.
Texas Instruments has announced its first integrated battery charge controller with a System Management Bus (SMBus) interface aimed at multicell, multichemistry battery packs used in portable applications TI's highly accurate and power efficient bq24721 charge management device easily interfaces to a system's host controller through an SMBus communications interface
This article was originally published on Electronicstalk on 8 Nov 2004 at 8.00am (UK)
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The charger offers 0.4% accuracy on charge voltage regulation and 2% accuracy on current amplifier outputs.
Using a synchronous NMOS-NMOS rectifier, the easy-to-design device can achieve power efficiencies up to 94%.
The bq24721 integrates several high-performance features, including the system power selector function, which automatically selects the AC adapter or the battery to properly manage the system load.
The device's dynamic power management (DPM) function controls the charge current depending on system load conditions, avoiding AC adapter overload.
In addition, high accuracy current sense amplifiers enable accurate measurement of either the charge current or the AC adapter current, allowing termination of the "nonsmart" packs and monitoring of overall system power.
The bq24721 is available now from TI and its authorised distributors.
The battery charge management IC comes in a 32-pin, 5 x 5mm QFN package, and suggested retail pricing is $4.90 in 1000-piece quantities.
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