ICB2FL02G Datasheet, PDF (26/55 Pages) Infineon Technologies AG – Smart Ballast Control IC for Fluorescent Lamp Ballasts

2^nd Generation FL-Controller for FL-Ballasts
Functional Description
2.5.2 Detection of End of Life 2 (EOL2) – Rectifier Effect
The rectifier effect (EOL2) is detected by measuring the positive and negative DC level of the lamp
voltage via a current fed into the LVS pin (Figure 22). This current is fed into the LVS pins (LVS1 for
single lamp and LVS2 for multi lamp applications) via Network R41, R42, R43 and R44 (see Figure 3).
If the sensed DC current exceeds ± 42 µA (Figure 22 LVSDC Current) for longer than 2500 ms, the
status of end-of-life (EOL2) is detected. The EOL2 fault results in a latched power down mode (after
trying a single restart) the controller is continuously monitoring. The insert of a new lamp or the
interruption of the input voltage resets the status of the IC.
Figure 22 End of Life (EOL2) Detection, Lamp Voltage versus DC LVS Current
Preliminary Datasheet
Page 26 of 55
ICB2FL02G
V1.2