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White Driver IC powers up to 8 LEDs in series.
White Driver IC powers up to 8 LEDs in series.

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White Driver IC powers up to 8 LEDs in series.


May 2, 2006 - Housed in 2.9 x 2.8 x 1.3 mm SOT23-6 package, Model TB62752AFUG powers multi-segment white LEDs used to backlight color LCD panels in small portable devices such as cell phones and PDAs. High output power allows for up to 800 mW LED loading, while dedicated surge-detection pin minimizes need for external components. Device operates with input voltages from 2.8-5.5 V and achieves power efficiency in excess of 80% during 7-segment white LED operation.

(Archive News Story - Products mentioned in this Archive News Story may or may not be available from the manufacturer.)

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White Driver IC Powers up to 8 LEDs in Series


Latham, New York: Marktech has expanded its Toshiba constant-current white LED driver product line with a compact DC/DC converter IC for powering multi-segment white LEDs used to backlight new larger, color LCD panels in small portable devices such as cell phones and PDAs. The high-precision, high-performance TB62752AFUG white LED driver IC allows designers to save space and reduce component count by using a single device to drive from 2-8 LEDs in series. High output power allows for up to 800mW LED loading,
while built-in protection functionality, including a dedicated surge-detection pin, further minimizes the need for external components. Suitable for use with portable designs based on Li-ion batteries, the TB62752AFUG operates with input voltages from 2.8V to 5.5V and achieves high power efficiency in excess of 80% during seven segment white LED operation. Current precision is guaranteed to within ±5% to ensure uniform LED lighting. Surge detection voltage is rated at 37V.

Integrated protection functionality is designed to accommodate open and shorted LED failure modes without additional components. In the case of an LED open circuit failure, the IC clamps the output voltage to a nondangerous level for the output transistor. No current will flow through the LEDs and the IC remains undamaged. This operation eliminates the need for Zener diodes traditionally used for such protection.
Should an LED short circuit failure occur, the TB62752AFUG ensures that the same current flows through the LED series configuration, with the result that all LEDs, except the failed part, continue to operate.

Toshiba's device is based on a BiCD 0.6µm process that combines high withstand voltage, high current capacity Double Diffused MOS (DMOS) technology with high current drive bipolar transistors and CMOS FETs for low power consumption and high integration. Withstand voltage for the part is rated at 40V. Supplied in a SOT23-6 package, the TB62752AFUG has dimensions of just 2.9mm x 2.8mm x 1.3mm, including lead length.

TB62752AFUG Features
o Compact SOT23 Package
o Can Drive 2-8 LEDs in a Series
o High Output Power up to 800mW
o Operating Voltage from 2.8V to 5.5V
o Integrated protection functionality

Pricing & Availability
Pricing for the TB62752AFUG Driver starts at $0.67 in 5K lots depending on package. Toshiba LED Drivers are only available through Marktech Optoelectronics. For more information on these or any of our other LED products contact Marktech Optoelectronics at 3 Northway Lane North, Latham, NY 12110, Phone: (800) 984-5337, FAX: (518) 785-4725, email: info@marktechopto.com. Website: www.marktechopto.com.

Marktech Optoelectronics: Marktech has been an industry leader in the application and design of LEDs for over 20 years. Toshiba America Electronic Components, Inc. has chosen Marktech to handle all North American technical sales and marketing for their
Tosbright® LEDs and Toshiba Constant Current LED Drivers. In addition to their Toshiba line Marktech also offers a wide range of standard Discrete, Surface Mount, and Dot Matrix Displays along with a complete line of Photo Sensors.

Contact: Carrah Daley
Marktech Optoelectronics
3 Northway Lane North
Latham, New York 12110
Web Site: www.marktechopto.com
Email: c.daley@marktechopto.com
Phone: 800.984.5337
Fax: 518.785.4725


Contacts:

General Information:
Marktech Optoelectronics
Carrah Daley
3 Northway Lane North
Latham NY 12110
USA
Phone: 800-984-5337
FAX: 518-785-4725
Send email  E-mail this person

Company Information:
Name: Marktech Optoelectronics
Address: 3 Northway Lane North
City: Latham
State: NY
ZIP: 12110
Country: USA
Phone: 800-984-5337
FAX: 518-785-4725
http://www.marktechopto.com


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SMD LED features typical luminosity of 1,500 mcd at 20 mA.
Stepping Motor Drivers feature current rating over 2 A.
Motor Controller delivers sensorless commutation.
DC-DC Converter powers white LEDs.
LEDs feature 463 nm wavelength.

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