AnalogicTech's LED Driver Provides 20% Lower Dropout Voltage, Extending Battery Life for Low Cost Mobile Products
February 10 2009 - 7:25AM
PR Newswire (US)
32-step Single-wire Bus Reduces Flicker, Noise While Optimizing LED
Control SANTA CLARA, Calif., Feb. 10 /PRNewswire-FirstCall/ --
Advanced Analogic Technologies Inc. (AnalogicTech(TM))
(NASDAQ:AATI), a developer of power management integrated circuits,
announced today the AHK3292, a two-channel LED driver for LED
indicators and LCD or keyboard backlighting in entry level mobile
products. Featuring low resistance current sinks capable of
supporting a low dropout voltage, the new LED driver reduces power
dissipation and extends battery life. The device's dropout voltage
of 36 mV typical is at least 20% lower than competitive products.
(Logo: http://www.newscom.com/cgi-bin/prnh/20050829/SFTU089LOGO )
"As LED manufacturers improve their technology and reduce the
voltage drop of their LEDs, in some applications a boost converter
is no longer necessary," says Phil Dewsbury, product line director.
"By driving LEDs directly from the battery using a low dropout
current sink, the AHK3292 offers designers of entry-level phones
and other mobile products a lighting solution that improves power
efficiency and extends battery life while reducing cost." Single
wire control Operating directly off a 2.7V to 5.5V input supply,
the AHK3292 drives up to two LEDs. This 1X driver IC is ideal for
driving LEDs with a low forward voltage drop. Low resistance, low
dropout voltage current sinks allow the LEDs to operate close to
the input supply voltage eliminating the need for an additional
boost converter and extending battery life. Maximum LED current is
set by an external resistor (R(set)) that enables designers to
optimize linearity and provide smoother control. Fullscale LED
current can be set to an upper limit of 30.2 mA. The output current
for each LED is enabled, disabled and controlled by AnalogicTech's
Simple Serial Control (S(2)Cwire) interface. By replacing PWM
control circuitry, this 32-step single-wire bus reduces the
overhead on the system microcontroller, minimizes LED flicker
through constant-current digital control, and reduces noise. LED
output current accuracy is +/- 10%. LED output current matching is
+/-3%. The AHK3292 also features a low current shutdown mode. Price
and Availability Qualified over a -40 to +85 degrees C temperature
range, the AHK3292 is available in a Pb-free 6-pin SOT23 package.
It sells for $0.39 in 1K quantities. About AnalogicTech Advanced
Analogic Technologies, Inc. (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 Santa Clara, California and Macau, S.A.R., with
offices in China (Beijing, Shanghai and Shenzhen), Hong Kong,
Taiwan, Japan, South Korea, and United Kingdom, 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:
http://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.
http://www.newscom.com/cgi-bin/prnh/20050829/SFTU089LOGO
http://photoarchive.ap.org/ DATASOURCE: Advanced Analogic
Technologies, Inc. CONTACT: Headquarters Contact: Karolien
Cools-Wittry of AnalogicTech, +1-408-737-4600, Karoliencw (at)
analogictech.com; or Agency Contact: Matthew Quint of Quint Public
Relations, +1-650-599-9450, Web Site: http://www.analogictech.com/
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