Power Management ICs suit converged portable products.
Share:
Press Release Summary:
Available in 4 x 4 mm QFN package, AAT2550/AAT2551 combine 1 A battery charger with two 600 mA step-down converters operating at 1.4 MHz. With charge current programmable from 100 mA to 1 A, charger offers integrated pass device, reverse blocking protection, thermal regulation, and charge status/termination. Model AAT2550 features digital thermal control loop in charger to reduce charge current. Charger in Model AAT2551 offers dual-path ac adapter and USB charging.
Original Press Release:
AnalogicTech Announces New Highly Integrated SystemPower IC for Converged Portable Products
Device Combines Two Buck Converters, Battery Charger With Digital Thermal Control
MUNICH, Germany, Nov. 14 -- Advanced Analogic Technologies Incorporated (AnalogicTech) (NASDAQ:AATI), a developer of power management semiconductors for mobile consumer electronic devices, announced today the AAT2550, a highly integrated power management IC for smart phones, portable media / music players, and other handheld computing devices. Targeted at portable systems powered by single-cell lithium ion / polymer batteries rated up to 1500 mAh, this highly integrated device saves PCB space by combining a 1A battery charger with two 600 mA step-down converters in a small 4 x 4 mm QFN package. This new device features a digital thermal control loop in the battery charger, which automatically reduces charge current when the demand on the power system exceeds its thermal limits.
"One of the challenges of squeezing three relatively high powered blocks into a single small package is that if all three operate concurrently, they can generate more heat than the single package can handle," said Bill Weiss, Product Line Director at AnalogicTech. "By integrating our digital thermal control loop into the battery charger, the AAT2550 senses when the IC is self- heating and automatically throttles back the battery charge current to decrease the power being dissipated without impacting the buck converters and thus preventing a processor interrupt or system shut-down. Moreover, by determining the highest level of charge current the system can maintain, this feature plays a major role in minimizing charge time."
For systems that require charging from either AC or USB sources, AnalogicTech is also announcing the AAT2551 SystemPower IC. Similar to the AAT2550, this device features a 1A charger and two 600 mA buck converters. However, the charger in the AAT2551 offers dual-path AC adapter and USB charging. The USB path offers two user-programmable charge currents to support USB low and high charge levels. The charger in the AAT2551 also adds AnalogicTech's innovative charge reduction function that automatically reduces charge current only to the extent necessary to preserve the integrity of the USB host voltage. By allowing users to charge the battery with the maximum available current from the USB port while keeping the port voltage regulated, this feature ensures that the battery charger will not overload the USB port even when other system applications share power with the port supply, and that the battery charge time is minimized. The AAT2551 will be available in Q1 2007.
Three-in-One Solution
Both the AAT2550 and AAT2551 feature a constant current / constant voltage battery charger with the charge current programmable, via an external resistor, from 100mA to 1A. The charger offers an integrated pass device, reverse blocking protection, high accuracy, digital thermal regulation, charge status and charge termination. It also adds over-voltage, over-current and thermal protection.
To help reduce the size of external components, the two 600 mA step-down converters in the AAT2550/51 operate at a 1.4 MHz switching frequency. Both devices operate off a 2.7 to 5.5V input and feature independent input, enable and feedback pins. Each converter consumes just 27 uA of no-load quiescent current.
Price and availability
Both the AAT2550 and the AAT2251 are specified over the -40 degrees C to +85 degrees C temperature range. The AAT2550 is available in a Pb-free, thermally-enhanced QFN44-24 package and sells for $2.19 each in 1,000 unit quantities. The AAT2551 comes in a Pb-free, thermally-enhanced TQFN44-28 package and sells for $2.40 each in 1,000 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 (AnalogicTech)
CONTACT:
Bill Weiss
AnalogicTech
+1-408-737-4600
billweiss@analogictech.com
Web site: www.analogictech.com/
