Charge Pump IC facilitates white LED flash applications.November 15, 2006 -
Model AAT3170 consists of 600 mA current output flash driver and programmable flash timer. Each LED output can be programmed in 32 steps by single GPIO output via AS(2)Cwire(TM) (Advanced Simple Serial Control(TM)) interface. Tri-mode device combines load switch (1x), fractional (1.5x), and doubling (2x) capability with internal sensing circuit to match output to LED requirements. Available in 12-pin 3 x 3 mm TDFN package, IC provides complete flash LED protection.
(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 Introduces 600mA Current-Output Charge Pump with Programmable Flash Timer
Device Combines High Output Current with Protection for Next Generation White LED Flash Applications
SUNNYVALE, Calif., Oct. 25 // -- Advanced Analogic Technologies Incorporated (AnalogicTech) (NASDAQ:AATI), a developer of power management semiconductors for mobile consumer electronic devices, today announced the AAT3170, a high output, high efficiency current-output charge pump IC for white LED flash applications. The new device combines a 600mA dual regulated current output flash driver and a safety timer. In addition, each LED output can be programmed in 32 steps by a single GPIO output through AnalogicTech's AS(2)Cwire(TM) (Advanced Simple Serial Control(TM)) interface.
"As mobile and personal electronic product designers embed higher performance cameras in their next-generation products and flash current levels increase, they need flash ICs that can protect the LEDs while delivering high power output with excellent control in a small package," said Adolfo Garcia, Product Line Director for AnalogicTech. "By combining a flash timer and high flash current drive with 32-step digital current control, the AAT3170 delivers unprecedented ability to optimize LED flash performance for a wide variety of next generation designs while providing complete flash LED protection."
The AAT3170's flash timer is programmable using an external capacitor. It can be used to either protect the LED from over dissipation in the event of a control logic failure or to preset the flash duration. In addition, the tri- mode device maximizes efficiency by combining a load switch (1x), fractional (1.5x) and doubling (2x) capability with an internal sensing circuit to match output to LED requirements. The 1x and 1.5x modes allow minimum current draw from the battery during lower LED current operations, such as torch or movie light modes, which run for a much longer period of time than the flash mode. Dual current sinks allow system designers to use single or dual (separate cathode) flash LED configurations.
The device's 32-step single wire interface smoothes transitions and gives designers flexible control of brightness in flash or other lighting modes. The interface can also be programmed to provide a regulated voltage instead of current, for additional system loads.
The AAT3170 requires just five external components: two 1.0 µF ceramic capacitors for the charge pump flying capacitors, one 1.0 µF capacitor for C(IN) and one for C(OUT), and one additional capacitor to set the flash timer duration. The device also features a thermal management system and built-in soft-start circuitry.
Price and Availability
The AAT3170 is immediately available in a Pb-free, thermally-enhanced, 12- pin 3x3 mm TDFN package and sells for $1.82 in 1,000-piece quantities.
About AnalogicTech
Advanced Analogic Technologies Incorporated (AnalogicTech) is a supplier of Total Power Management(TM) semiconductor solutions for mobile consumer electronic devices, such as wireless handsets, notebook and tablet computers, smartphones, digital cameras, wireless LAN, and personal media 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 also develops and licenses device, process, package, and application-related technology. AnalogicTech is headquartered in Sunnyvale, California, with offices in South Korea, Taiwan, Hong Kong, Macau, Shanghai, Shenzhen, Beijing, Japan, Sweden, UK, and France, as well as a worldwide network of sales representatives and distributors. The company is listed on the NASDAQ exchange under the ticker symbol AATI. For more information, please visit the AnalogicTech website: www.analogictech.com.
(AnalogicTech - G)
Source: Advanced Analogic Technologies Incorporated
CONTACT:
Adolfo A. Garcia
AnalogicTech,
+1-408-737-4600
agarcia@analogictech.com
Web site: http://www.analogictech.com/
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