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Supertex rolls out HB driver IC

Posted: 18 May 2004 ?? ?Print Version ?Bookmark and Share

Keywords:supertex? hv9910? led driver ic?

Supertex Inc. has disclosed that its HV9910 is the industry's first universal, high brightness (HB) LED driver IC.

A flexible and simple LED driver IC, the new device achieves an efficiency of over 93 percent, and features a lower parts count than other solutions while offering a low system cost. The HV9910 is designed to convert high voltage supplies of 85V to 265Vac rectified or 8V to 450Vdc to a constant current source for powering a string or a combination of strings of HB LEDs.

"HV9910 is the solution to meet customer needs for a low cost, simple HB LED driver for high voltage, off-line applications or low voltage, 12V to 45Vdc battery-powered systems," said Brian Hedayati, Director of Marketing at Supertex.

The driver IC utilizes constant frequency peak current control pulse width modulation (PWM) operation using a small inductor and an external switch to minimize the LED driver losses. Unlike conventional PWM controllers it uses a simple on/off control to regulate the LED current, simplifying control circuit design.

It has built-in dimming controls that work with an external PWM signal featuring a dimming range of 0 to 100 percent or it can be set and adjusted linearly to any value between zero to maximum LED current by applying a control voltage to the linear dimming pin.

Target applications include LED general and decorative lighting, LED signs replacing neon signs and other high voltage ac and dc input-based applications.

The HV9910 is available in SO-16-pin, SO-8-pin and DIP-8-pin packages for 76 cents, 62 cents and 60 cents, respectively. Pricing is for 5,000-unit quantities.

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