New Three Channel LED Driver From Supertex Features Channel-Independent Fault Control
December 09 2010 - 9:00AM
Marketwired
Supertex (NASDAQ: SUPX), a recognized leader in high voltage analog
and mixed signal integrated circuits (ICs), today introduced
HV9986, a three channel switch-mode LED driver IC with three dimmer
switch FET drivers that enable high PWM dimming ratios and
independent fault management in case of any output open- or
short-circuit conditions. The IC provides high LED current accuracy
through closed loop control of the output current and is ideal for
driving multiple strings of LEDs for edge lighting or backlighting
in LCD TVs and monitors.
HV9986 features a 40V linear regulator that provides a 5V power
supply to the IC. The switching frequencies of each channel can be
controlled either with an external clock signal or by using the
IC's internal oscillator. The IC features peak current mode control
with the channels synchronously switched 120 degrees apart to
reduce input current ripple and help minimize EMI. Gate drivers
within the chip are optimized for driving logic level FETs. Each
channel can be individually dimmed via linear or PWM dimming
methods.
"The HV9986 offers independent fault control for each channel
which is flagged to and controlled by a microcontroller," states
Hernan DeGuzman, Vice President of Marketing for Supertex. "This
feature offers the system designer more flexibility when
considering various scenarios for LED backlighting of LCD displays
and TVs."
HV9986 is available in 40-lead QFN package (HV9986K6-G). The IC
is RoHS compliant. Samples of HV9986K6-G are available from stock.
Lead-time for production quantities of the HV9986K6-G is 4-6 weeks
ARO. Pricing is US$2.15 each for HV9986K6-G in 1K quantities.
About Supertex Supertex, Inc. is a
publicly held mixed signal semiconductor manufacturer, focused on
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.com.
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