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HIGHLY EFFICIENT LED DRIVER FROM SUPERTEX PROLONGS LIFETIME OF SOLID-STATE LIGHTING SYSTEMS

Sep 28, 2009

Supertex


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SUNNYVALE, Calif., July 16, 2009 – Supertex, Inc. (NasdaqGS: SUPX), a recognized
leader in high voltage analog and mixed signal integrated circuits (ICs), today
introduced the HV9918, a buck-mode LED driver IC with hysteretic current control and
high-side current sensing. It is ideal for a variety of solid-state lighting applications,
such as low voltage industrial and architectural LED lighting, signage or decorative
lighting, indicator or emergency lighting, as well as a general purpose constant current
source.

The hysteretic control function of the HV9918 maintains a constant output current
to the LED string at all times, regardless of input voltage fluctuations. LEDs are proven
to be far more reliable and long lasting when driven by a constant current than by a
direct voltage source. It drives loads of up to 1.0A at over 90% efficiency with +/-5%
current accuracy from input voltages of 4.5 to 40V. The IC also features an embedded
FET for cost and parts count reduction in solid-state lighting applications.
“Supertex’s HV9918 provides fast transient load response and eliminates the
need for feedback-loop compensation,” states Ahmed Masood, Vice President of
Marketing for Supertex. “With its built-in switching FET, this device reduces overall
system cost and board space while delivering accurate current control for LED lighting
applications.”

The HV9918 is available in an 8-Lead DFN package (HV9918K7-G). The part is
Green and RoHS compliant. Samples are available from stock. Lead-time for
production quantities is 4-6 weeks ARO. Pricing is US$0.68 for the HV9918K7-G in 1K
quantities.

About Supertex
Supertex, Inc. is a publicly held mixed signal semiconductor manufacturer,
focused in high voltage analog and mixed signal products for use in the medical, LED
lighting, imaging, industrial, and telecommunication industries. Supertex product,
corporate and financial information is readily available at www.supertex.



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