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- 27 -

Fig 20. Broken Lamp Test

Trace

Color

Signal

2

Red

CS Pin Voltage

3

Blue

Lamp Arc Current

4

Green

Lamp Voltage

The above waveforms illustrate the delay of approximately 1ms introduced by the fault counter.

This avoids any possibility of false tripping occurring if random transients occur.

Disclaimer

This reference design kit is intended for evaluation purposes only and has not been submitted or

approved by any external test house for conformance with UL or international safety or performance

standards. International Rectifier does not guarantee that this reference design will conform to any such

standards.

Ballast Designer software may be downloaded free of charge from:

www.irf.com/whats-new/nr051026.html

IR WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245 Tel: (310) 252-7105

Data and specifications subject to change without notice.

3/13/2008