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Optoelectronics/Displays??

Supertex LED driver IC with wide input voltage range

Posted: 05 Dec 2005 ?? ?Print Version ?Bookmark and Share

Keywords:Supertex? LED driver IC? LED? HV9911? HV9911NGG?

HV9911 LED driver IC

Supertex unveiled a new LED driver IC designed to provide high LED current accuracy and a wide input voltage range (9V to 250V). According to the press release, the new HV9911 is specially designed for DC/DC applications such as RGB backlighting, automotive lighting and battery powered LED lamps.

The HV9911 is a switch mode LED driver IC. It features an internal transconductance operational amplifier for tighter line and load regulation of the LED current, and good transient response to PWM dimming. This device can be synchronized in applications requiring multiple LED drivers to prevent system subharmonic oscillations, which is often associated with driving multiple driver schemes, said Supertex.

Ahmed Masood, director of marketing for Supertex, added that the HV9911 is a powerful and versatile LED driver IC that uses a closed loop system for exceptionally accurate LED current control.

The HV9911 features fixed frequency or fixed off-time operation for use in a variety of converter topologies such as boost, fly-back and buck. This device also features slope compensation to allow for wider operating ranges in fixed frequency mode, and an internal regulator for use in both low voltage and high voltage applications.

The HV9911 is available in a 16-lead SOIC package (HV9911NGG). The part is "Green" and RoHS compliant. Samples are available from stock, and lead time for production quantities is between 4 to 6 weeks ARO. Pricing is $1.15 each for the HV9911NGG in 1,000-unit quantities.




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