Date: 18/12/2008

High brightness LED driver with high efficiency and hysteretic control

Supertex introduced the HV9919, a pulse-width managed (PWM) controller integrated circuit designed to drive LEDs using a buck topology. It is well suited for a variety of solid-state 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.

It uses high-side current sensing and hysteretic control to accurately regulate output current, ensuring consistency and prolonging LED life. 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

Packaging: 8-lead DFN package
RoHS compliant: Yes
Availability: Samples are available from stock. Lead-time for production quantities is 4-6 weeks ARO.

Pricing: US$0.55 each for HV9919K7-G in 1K quantities.

For further information visit: www.supertex.com