High Voltage LED Driver From Supertex Delivers High Efficiency and High Power Factor for LED Lamp and LED Tube Applications
25 Februar 2014 - 3:00PM
Marketwired
High Voltage LED Driver From Supertex Delivers High Efficiency and
High Power Factor for LED Lamp and LED Tube Applications
HV9805 Driver IC Is Specifically Targeted at Driving LED Lamps
and LED Tubes With a True DC Current
SUNNYVALE, CA--(Marketwired - Feb 25, 2014) - Supertex (NASDAQ:
SUPX), a recognized leader in high voltage analog and mixed signal
integrated circuits (ICs), today introduced the HV9805, an LED
driver IC, where the LED light source is arranged as a high voltage
LED string in order to accommodate certain lamp form factors, while
allowing for cost savings through less complicated cooling and
optical arrangements. The driver includes a linear post
regulator to provide a pure DC current drive, for flicker free
light output. The linear post regulator also provides
protection from line voltage transients.
HV9805 supports a simple and low cost driver circuit, which
combines a PFC boost stage and a linear post regulator for
regulating the LED current to a DC value. The boost stage
employs the boundary conduction mode, with the output regulated for
lowest overhead voltage at the linear regulator. The headroom
voltage can be freely selected to optimize the efficiency of the
post regulator or to minimize the cost or size of the bus
capacitor.
The boost converter employs a cascode switch for high speed
switching and convenient generation of the housekeeping (VDD)
supply. The low voltage device of the cascode switch is integral to
the HV9805 and is rated at a current of 1A. VDD power is
derived with high efficiency and without the need for extra
components or magnetic windings.
"The HV9805 offers an interesting alternative for lowering the
cost of LED lighting solutions, while improving the performance of
the light source. High power factor, low THD, and high
efficiency are attained through use of two simple stages. The
HV9805 offers the lighting designer a powerful alternative for
optimizing their designs, as they examine the tradeoffs of
performance and lower system cost," states Alex Mednik, Application
Engineering Director at Supertex.
The HV9805 is available in a lead(Pb)-free/RoHS compliant
10-lead MSOP package (HV9805MG-G). Samples are available from
stock. Pricing is US$0.77 each in 1K quantities.
About Supertex Supertex, Inc. is a publicly held mixed signal
semiconductor manufacturer, focused in high voltage interface
products for use in the telecommunications, networking systems,
flat panel displays, medical and industrial electronics industries.
Supertex product, corporate and financial information is readily
available at www.supertex.com.
Corporate
Headquarters: Christine Mahiya Marketing Communications
Manager 408/222-4858 christin@supertex.com
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