Battery Charger IC operates from ac adapter or USB port.
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Press Release Summary:
Model AAT3685 single-cell battery charger IC supports constant charge currents up to 1 A. Designed to regulate battery charge voltage and current for any 4.2 V lithium-ion/polymer battery cell, it combines charging device, reverse blocking diode, and current sensing circuit in 3 x 3 mm TDFN package. IC adds serial interface output that reports any of 14 status states to microcontroller. Over-voltage and over-temperature circuits shut down device in event of failure.
Original Press Release:
AnalogicTech Expands Battery Charger IC Product Family
Highly Flexible Device Supports Either AC Adapter or USB Charging at Rates Up to 1A
SUNNYVALE, Calif., Feb. 15 / -- Advanced Analogic Technologies Incorporated (AnalogicTech) (NASDAQ:AATI), a developer of power management semiconductors for mobile consumer electronic devices, today announced the AAT3685, a single-cell lithium-ion/polymer battery charger IC capable of operating from either an AC line adapter or USB port output. Depending upon port type, this highly integrated device supports constant charge currents up to 1A.
"Cell phone and other battery-powered device manufacturers are always trying to give their customers as much flexibility as possible," said Bill Weiss, AnalogicTech's Product Line Director for battery manager ICs. "Since the AAT3685 can be programmed for two separate constant current charge levels up to 1A, users can now charge their device from either an AC source or any USB port without compromising their fast charge rate."
Charge Reduction Loop
Designed to regulate battery charge voltage and current for any 4.2V lithium-ion/polymer battery cell, the AAT3685 combines a charging device, reverse blocking diode, and current sensing circuit in a compact 3x3mm TDFN package. An innovative Charge Reduction Loop minimizes charge time by allowing users to charge the battery with available current from the charge supply while keeping the port voltage regulated. Such dynamic control of the charge current enables the fastest possible charge time while sharing the port supply. This feature automatically compensates for voltage sags and ensures the battery charger will not overload the USB port if other system applications share power with the port supply.
The AAT3685 also offers a wide variety of protection features to ensure the integrity of the charger and the battery. Battery temperature and charge state are continually monitored for fault conditions. Over-voltage and over- temperature circuits automatically shut down the device in the event of a failure. Status monitor output pins are provided to drive two external LEDs to indicate battery charge status. The device also adds a serial interface output which can report any of 14 different status states to a microcontroller.
Price and Availability
The AAT3685 is rated over the -40 degrees C to +85 degrees C temperature range and is immediately available in a Pb-free, thermally-enhanced, 12-pin, 3x3mm TDFN package. The device sells for $1.20 in 1000-unit quantities.
About AnalogicTech
Advanced Analogic Technologies Incorporated (AnalogicTech) is a supplier of power management semiconductors for mobile consumer electronic devices, such as wireless handsets, notebook and tablet computers, smartphones, digital cameras, and digital audio players. The company focuses its design and marketing efforts on the application-specific power management needs of consumer, communications, and computing applications in these rapidly evolving devices. AnalogicTech is headquartered in Sunnyvale, California, with offices in Beijing, Hong Kong, Japan, Shanghai, Shenzhen, South Korea, Sweden, and Taiwan, as well as a worldwide network of sales representatives and distributors. For more information, please visit the AnalogicTech website: www.analogictech.com. (AnalogicTech - G)
Source: Advanced Analogic Technologies Incorporated
CONTACT:
Bill Weiss of AnalogicTech,
+1-408-737-4600,
or bweiss@analogictech.com
Web site: www.analogictech.com/
