Reference Design Data Sheet intended for design information only.

Subjected to changes without prior notice.

9

The following waveforms (see Figures 1 and 2) are from a dual 40W/T12 ballast (see Bill of

Materials) and include ballast input, ouput and control measurements during all modes of

operation.

Figure 1 : Line input voltage (upper trace, 200V/div) and

Figure 2 : Drain-to-source voltage (upper trace, 200V/div)

current (lower trace, 0.5A/div) during 120VAC normal

current (lower trace, 0.5A/div) during 230VAC normal

operation. Timescale = 5ms/div.

operation. Timescale = 5ms/div.

Figure 3 : Line input current (200V/div) during preheat,

Figure 4 : Rectifier output voltage (upper trace, 200V/div),

ignition and running operating conditions.

VCC IR2153 (middle trace, 10V/div) and VDD LX1562

Timescale = 0.5s/div.

(lower trace, 10V/div) during start-up. Timescale = 5ms/div.

IRPLLNR1

Measurements (cont.)