Opto-Electronics


Universal transformerless AC-DC LED driver

25 July 2007 Opto-Electronics

Zywyn recently introduced the ZD832, a universal transformerless AC-DC constant current LED driver for the industrial lighting and display lighting markets.

The device is a high voltage, AC-DC constant current driver for driving a string of white or RGB LEDs in series without the use of an external transformer or bridge rectifier. It operates from a direct input voltage of 85 to 240 V a.c. directly from the AC mains and generates a programmable constant output current of up to 30 mA using a single resistor. This opens up new design and processing methodology in dealing with off-line AC-DC applications in display and lighting.

The ZD832 also features PWM and analogue dimming control with over-temperature protection and over-voltage limiting functions. With high voltage isolation supported by robust proprietary processing technology, there is no EMI generation and it does not require any additional EMI filtering circuits.

For more information contact NuVision Electronics, +27 (0)11 894 8214, rmcmaster@nuvisionelec.co.za, www.nuvisionelec.co.za



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