Lithium-ion/Polymer Battery Charger prevents overheating.

Press Release Summary:

Available in 12-pin, 3 x 3 mm TDFN package, Model AAT3697 linear battery charger offers up to 2 A of charge current and occupies 9 mm² of PCB area. Rated over -40 to +85°C temperature range, unit features digital thermal loop control system which measures internal circuit temperature and automatically reduces fast charge current when device exceeds preset die temperature threshold. Charger also has 2 status monitor output pins for driving external LEDs to indicate charge status.

Original Press Release:

AnalogicTech Announces Highest Power Density 2A Battery Charger

SUNNYVALE, Calif., April 4 -- Advanced Analogic Technologies Incorporated (AnalogicTech) (NASDAQ:AATI), a developer of power management semiconductors for mobile consumer electronic devices, announced today the AAT3697, an extremely high power density linear battery charger for Lithium-ion/polymer batteries. Coming in a small, 12-pin, 3mm x 3mm TDFN package, the latest addition to AnalogicTech's rapidly expanding battery charger product line offers up to 2A of charge current while occupying only 9 mm² of PCB area.

"Power density is an increasingly important consideration in a wide variety of high performance handheld systems, like smart phones, GPS systems and portable media players that use high capacity batteries," notes Bill Weiss, product line director for AnalogicTech. "This new linear charger offers the industry's highest charge-current-to-solution-footprint ratio while the integration of AnalogicTech's intelligent digital thermal loop feature enables the host system to use a high current linear charger without the risk of pulse charging the battery."

Intelligent thermal management

The AAT3697 integrates an internal charging device, reverse blocking and current sensing circuits. An intelligent digital thermal loop control system continuously measures internal circuit temperature and automatically reduces the fast charge current when the device exceeds a preset die temperature threshold. By constantly evaluating the die temperature and adjusting the fast charge current only to the extent necessary, this closed-loop thermal management system maximizes charge current and minimizes charge time, even under harsh high temperature operating conditions.

The AAT3697 continuously monitors battery temperature and charge state for fault conditions. If an over-voltage or over-temperature condition occurs, the device automatically shuts down to protect the charging device, the control system and the battery under charge. A battery charge timer also protects the battery and the system by terminating charge if the user-programmable charge time is exceeded.

The new battery charger also features two status monitor output pins capable of driving external LEDs to indicate charge status. A serial interface output can be used to report any of 12 charge states to the system microcontroller.

Price and availability

The AAT3697 is available in a Pb-free, thermally-enhanced, 12-pin TDFN 3x3-mm package and is rated over the -40 degrees C to +85 degrees C temperature range. It sells for $1.16 each in 1,000 piece 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:

Source: Advanced Analogic Technologies Incorporated



Bill Weiss,



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