Supertex’s AT9919 LED-lamp-driver IC

Published:2011/9/26 22:49:00 Author:Amy From:SeekIC

Supertex, Inc., a publicly held mixed signal semiconductor manufacturer, recently introduced AT9919, an LED lamp driver integrated circuit (IC), targeting in use of solid-state lighting applications in automobiles, such as head lights, tail lights, brake indicator lights, dome lights, and panel backlights. AT9919 drives LEDs using a buck topology. It is in a compact, eight-lead, DFN package.

With delay control function of the IC, an output current to the LED string is maintained at all times, thus, to increase the reliability and lifetime of the LEDs. A PWM-control signal achieves LED brightness, and the IC drives loads of as much as 1A at more than 90% efficiency at input voltages of 4.5 to 40V.

“By accurately delivering a consistent current to LEDs in automotive applications, the AT9919 ensures consistent brightness and prolongs LED lifetimes,” states Stephen Lin, Vice President of Marketing for Supertex. “The IC is available in a compact DFN package, and its high switching frequency reduces the need for many external components, which reduces both the size and the cost of the assembly.”

The AT9919 is available in an eight- lead DFN package (AT9919K7-G). The part complies with RoHS certification. The devices are priced at US$0.98 each for the AT9919K7-G in 1K quantities.

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