Supertex, Inc. (NasdaqGS: SUPX) has 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 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.

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