Product category:
Power Supply ICs and Controllers
News Release from: Texas Instruments (April 2001-March 2006) | Subject: bqTiny III and bq2501x
Edited by the Electronicstalk Editorial
Team on 20 August 2004
Power chips help lithium cells last
longer
Two new families of single-chip, battery charge and power management ICs provide safer, more efficient charging capabilities for single-cell lithium-ion applications.
Two new families of single-chip, battery charge and power management ICs provide safer, more efficient charging capabilities for single-cell lithium-ion applications The bqTiny III (or bq2403x) series of Li-ion linear charge and system power path management devices is the latest advancement in TI's bqTiny line of battery management charge ICs
This article was originally published on Electronicstalk on 8 Nov 2004 at 8.00am (UK)
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In addition to integrated PowerFETs, high-voltage protection, current sensor, reverse-blocking protection, thermal regulation, high accuracy current and voltage regulation, the IC offers a dynamic power-path management (DPPM) feature.
The DPPM feature allows bqTiny III to power a smart phone, PDA, MP3 player or digital still camera while independently charging the battery.
It autonomously selects the USB port or the AC adapter as the power source for the system when either input source is connected.
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In the absence of input sources, the bqTiny III powers the system from the battery through an integrated low-on-resistance power FET.
The IC ensures a continuous and uninterrupted flow of power to the system, while reducing the number of charge and discharge cycles on the battery.
The DPPM feature in bqTiny III also allows the system to power up with a defective or fully discharged battery pack.
In addition to the bqTiny III family, TI's new bq2501x integrated charge and power management devices combine a battery charge IC with a low-power, highly efficient synchronous DC/DC conversion IC on a single chip to support space-limited, Li-ion powered portable applications, such as Bluetooth headsets and accessories.
The bq2501x devices provide an integrated PowerFET, current sensor, reverse blocking protection and intelligent battery management features such as an automatic sleep mode.
In addition, the new devices integrate a 150mA DC/DC convertor that provides up to 95% power conversion efficiency and can operate directly from a single-cell Li-ion or Li-poly battery.
The output voltage is either adjustable (bq25010), or fixed at 3.3V (bq25011), or at 1.8V (bq25012).
The bqTiny III is in volume production from TI and its authorised distributors.
The bq2501x family of battery charge and power management ICs is currently sampling with volume production scheduled for the fourth quarter, 2004.
All bqTiny III devices are packaged in small 3.5 x 4.5mm QFN packages, and are priced at $2.30 each in quantities of 1000 units.
The bq2501x devices come in 20-pin MLP packages (3.5 x 4.
5mm), and are priced at $2.05 each in quantities of 1000.
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