ICB2FL02G Datasheet, PDF (16/55 Pages) Infineon Technologies AG – Smart Ballast Control IC for Fluorescent Lamp Ballasts

2^nd Generation FL-Controller for FL-Ballasts
Functional Description
Figure 7 shows the lamp voltage versus the frequency during the different phases from Preheating to
the Run Mode. The lamp voltage rises by the end of the Preheating phase with a decreasing
frequency (e.g. 100 kHz to 50 kHz) up to 700 V during Ignition. After Ignition, the lamp voltage drops
down to its working level with continuo decreasing the frequency (Figure 7) down to its working level
e.g. 45 kHz (set by a resistor at the R_FRUN pin to ground). After stops the decreasing of the frequency,
the IC enters the Pre Run mode.
Lamp Voltage vs Frequency @ different Modes
1000
900
800
700
600
500
400
300
200
100
0
10000
Frequency [Hz]
After Ignition Before Ignition
1000
900
800
700
600
500
400
300
200
100
0
100000
Figure 7 Lamp Voltage versus Frequency during the different Start up Phases
Preliminary Datasheet
Page 16 of 55
ICB2FL02G
V1.2