Isolated LED Driver From Supertex Reduces Component Count in General Solid-State Lighting Applications
December 13 2012 - 2:00PM
Marketwired
Supertex (NASDAQ: SUPX), a recognized leader in high voltage analog
and mixed signal integrated circuits (ICs), today introduced HV9973
-- a patented, isolated, constant current LED driver for use in
high voltage solid-state lighting applications such as incandescent
bulb retrofits. The IC achieves +/-3% current accuracy through
patented primary side current sensing and has internal over voltage
and short circuit protection. This sensing approach eliminates the
need for secondary sensing components, thus reducing component
count, circuit size and cost. The patented control technique also
makes the output current setting insensitive to most component
tolerances and parasitic without the need of an opto-coupler
feedback.
HV9973 controls an isolated, flyback topology that meets UL
requirements for galvanic isolation and operates from
280-400VDC.
"HV9973 utilizes a patented primary-side output control
technique that maintains 3% control of the LED current setting and
features tight line and load regulation," states Alex Mednik,
Director of Applications Engineering for Supertex. "The IC also
offers a logic input for dimming LED light output by low frequency
pulse-width modulation of the output current."
HV9973 is available in a RoHS compliant 8-lead SOIC package
(HV9973LG-G). Samples are available from stock. Lead-time for
production quantities is 4-6 weeks ARO. Pricing is US$1.62 each for
HV9973LG-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, display, industrial, and telecommunication
industries. Supertex product, corporate and financial information
is readily available at www.supertex.com.
Corporate Headquarters: Christine Mahiya Marcom Manager
408/222-4858 christin@supertex.com
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