Products, Materials & Tools | Dec 17, 2008

Highly Efficient Hysteretic LED Driver from Supertex in Compact Package

Supertex, Inc. (NasdaqGS: SUPX) today introduced the HV9919, a pulse-width managed (PWM) controller integrated circuit (IC) designed to drive LEDs using a buck topology. It is well suited for a variety of solidstate lighting applications, such as: industrial, architectural, signage, or decorative lighting; indicator or emergency lighting; and as a general purpose constant current source.
The HV9919’s hysteretic control function maintains its output current between a fixed minimum and maximum level at all times, ensuring that the LED current will not change, despite surges in the input conditions. Built-in PWM circuitry in the IC provides true constant color and a high dimming range. Its dimming frequency can be programmed with a single capacitor.
Supertex’s HV9919 uses high-side current sensing and hysteretic control to accurately regulate output current, ensuring consistency and prolonging LED life,” states Ahmed Masood, Vice President of Marketing at Supertex. “Switching frequency of up to 2.0 MHz permits the use of only small inductors and capacitors in circuit design, thereby minimizing space and cost in the overall system and making it ideal for solidstate lighting applications with space constraints and lower voltage requirements.”
• Low voltage industrial and architectural lighting
• General purpose constant current source
• Signage and decorative LED lighting
• Indicator and emergency lighting
• Hysteretic control with high-side current sensing
• Wide input voltage range: 4.5 to 40V
• >90% Efficiency
• Typical ±5% LED current accuracy
• Up to 2.0MHz switching frequency
• Adjustable constant LED current
• Analog or PWM control signal for PWM dimming
• Over-temperature protection
• -40ºC to +125ºC operating temperature range
HV9919 is available in an 8-lead DFN package (HV9919K7-G). It is Green and RoHS compliant. Samples are available from stock. Lead-time for production quantities is 4-6 weeks ARO. Pricing is US$0.55 each for HV9919K7-G in 1K quantities.
About Supertex:

Supertex, Inc. is a publicly held mixed signal semiconductor manufacturer, focused on high voltage interface products for use in the telecommunications, networking systems, medical, automotive and industrial electronics industries. Supertex product, corporate and financial information is readily available at
tony2010electronic says: (on Nov 24, 2010 10:27 AM)
Dear Sir,

We have LED lights with UL, CE and RoHs on spot lamp, light bulb, down light and high bay light.

JIESEN LED LIGHTING is a China-based company selling high quality LED lighting products produced by our select partners who are professional lighting manufacturers at country.

We are committed to providing quality, sustainable products that are a direct replacement for incandescent, halogen and CFL bulbs and fixtures. LED lights are solid state, non-toxic, contain zero mercury and are environmentally friendly, so LEDs are clearly a far better choice to cut energy costs and to be safe to the environment.

Should you have any problems, concerns or issue, please feel free to contact us or email us.
Thank you.

Best Regards.
Tony (Sales Representative)

Tel: 86-0757-82783242 Fax: 86-0757-82783240
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