Switching Charger IC targets mobile devices.March 11, 2009 -
Housed in 3 x 3 mm TDFN package, Model AAT3620 operates across 4.3-6.0 V input range and performs charging using 1.5 MHz PWM converter. During constant current and most of constant voltage mode, device delivers up to 2 A. When current dips below 300 mA in CV mode, device automatically switches to low-noise linear mode minimizing noise, EMI, and RFI emission. Li-Ion charger also features programmable end of charge, built-in reverse blocking, and integrated programmable charging timer.
(Archive News Story - Products mentioned in this Archive News Story may or may not be available from the manufacturer.)
Original Press release
Advanced Analogic Technologies Inc.
830 E. Arques Ave.
Sunnyvale, CA, 94085
USA
AnalogicTech Announces Industry's First 2A Switching Charger IC for Feature Rich Mobile Devices
High Efficiency, Low Noise Device Delivers Maximum Current in Compact 3x3 mm Package
SANTA CLARA, Calif., Feb. 26 /-- Advanced Analogic Technologies, Inc. (AnalogicTech(TM)) (NASDAQ:AATI), a developer of power management integrated circuits, announced today the AAT3620, the industry's first fully integrated single-cell Lithium-ion battery charger capable of supplying up to 2A charge current in a small 3x3 mm TDFN package. This innovative dual mode solution provides a high efficiency switching charger during Constant Current (CC) and Constant Voltage (CV) mode. To minimize EMI and RFI emission, the device switches to linear mode during CV mode where power dissipation is at a minimum.
"As portable devices integrate increasingly complex features such as GPS, Bluetooth, Wi-Fi, FM, cameras, and high resolution displays, they require higher capacity batteries and longer charge times to support those functions," says Siamak Bastami, product line director for AnalogicTech. "This unique solution is optimized to serve these portable systems where larger battery capacity and faster charge time is an essential requirement for high performance."
Low Noise Linear Mode
The AAT3620 is a dual mode, PWM switching and linear mode charger designed to maximize charge efficiency. Operating across a 4.3V to 6.0V input range, the device performs battery charging using a 1.5 MHz PWM converter. During CC and most of CV mode the device delivers up to 2A. When the current dips below 300mA in CV mode, the device automatically switches to a low noise linear mode minimizing noise, EMI and RFI emission.
The AAT3620 also features programmable end of charge using external resistor, built-in reverse blocking, a 1% constant voltage mode regulation and an integrated programmable charging timer. Over-voltage, over-current and over-temperature protection circuits monitor charge state and battery charge temperature for fault conditions. The charger IC also adds a status monitor output pin to indicate battery charge status and power source status via a display LED.
Price and Availability
Qualified over a -40 to +85 degrees C temperature range, the AAT3620 is available in a 14-pin, 3x3-mm TDFN package. It sells for $1.60 in 1K quantities.
About AnalogicTech
Advanced Analogic Technologies, Inc. (AnalogicTech) is a supplier of Total Power Management(TM) semiconductor solutions for a variety of consumer, communications, and computing systems. The company focuses its design and marketing efforts on the application-specific power management needs of such devices as mobile handsets, smartphones, digital cameras, netbooks / notebooks, personal navigation systems, and wireless LANs. AnalogicTech also develops and licenses device, process, package, and application-related technologies. AnalogicTech is headquartered in Santa Clara, CA and Macau, S.A.R., with offices in China, Hong Kong, Taiwan, Japan, Korea, and the U.K., as well as a worldwide network of sales reps and distributors. The company is listed on NASDAQ under the symbol AATI. For more information, please visit www.analogictech.com. (AnalogicTech - G)
AnalogicTech and the AnalogicTech logo are trademarks of Advanced Analogic Technologies Incorporated. All other brand and product names appearing in this document are registered trademarks or trademarks of their respective holders.
Web site: http://www.analogictech.com/
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