Recently, Supertex, Inc. introduced an LED driver- the HV9919, which designed to drive LEDs using a buck topology. The company said 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.

Supertex’ HV9919 is a pulse-width managed (PWM) controller integrated circuit (IC), it has a 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.

Ahmed Masood, Vice President of Marketing at Supertex noted that HV9919 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 in the overall system and making it ideal for solid-state lighting applications with space constraints and lower voltage requirements.

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 www.supertex.com.