Product category:
Power Supply ICs and Controllers
News Release from: Advanced Analogic Technologies | Subject: AAT3681
Edited by the Electronicstalk Editorial
Team on 11 May 2006
All-in-one charger chip saves portable
space
A simple, complete USB/AC adapter battery charger comes in an ultrasmall 2.0 x 2.1mm package, allowing designers to meet tight space constraints and reduce development time.
Many emerging portable applications - such as Bluetooth headsets, high-end portable music players, and compact digital cameras - use extremely small batteries that require tiny low-power battery chargers By offering a simple, complete USB/AC adapter battery charger in an ultrasmall 2.0 x 2.1mm package, AnalogicTech's AAT3681 allows designers to meet tight space constraints, reduce development time and quickly get their product to market
This article was originally published on Electronicstalk on 16 Jun 2004 at 8.00am (UK)
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The AAT3681 is an extremely small, single-cell lithium-ion/polymer battery charger IC designed to operate from either a USB or an AC adapter on the same input.
This latest addition to AnalogicTech's rapidly growing battery charger IC product line supports the latest generation of space-constrained ultra-portable applications by supplying up to 300mA in a tiny SC70JW package.
The AAT3681 integrates a charging device and reverse blocking diode to precisely regulate battery charge voltage and current for 4.2V lithium-ion/polymer battery cells.
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It operates from a DC power source or USB port across a 4.0 to 6.5V input voltage range.
The device's adapter/USB charge input constant current level can be programmed up to 300mA for rapid charging.
The AAT3681 includes a status monitor output pin capable of directly driving an external LED to indicate battery charge state.
Other than optional decoupling capacitors, the device requires only a single external resistor for complete functionality.
Protection circuits in the AAT3681 continuously monitor the charge state for fault conditions.
If an overvoltage, short-circuit or overtemperature condition occurs, these circuits automatically shut down the AAT3681 to protect the charging device, control system, and battery under charge.
The AAT3681 is AnalogicTech's first production device developed in its proprietary new ModularBCD process technology.
This new process differs from conventional BCD technologies by using a low-temperature, CMOS-like flow capable of achieving high yields while ensuring device performance and electrical isolation.
By allowing AnalogicTech's designers to easily add or remove modules and devices with different supply voltages, this highly modular process vastly simplifies analogue and mixed-signal circuit reuse.
The AAT3681 battery charger IC is a stand-alone product and is a key ModularBCD building block for upward integration into power SoCs.
Specified over the -40 to +85C temperature range, the AAT3681 is available in a Pb-free, 8-pin 2.0 x 2.1mm SC70JW package.
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