ICB2FL03G Datasheet, PDF (34/60 Pages) Infineon Technologies AG – 2nd Generation FL Controller for Fluorescent Lamp Ballasts

ICB2FL03G
Controller for Fluorescent Lamp Ballasts
Functional Description
2.8.1.2 IC Remains in Preheating Phase
This feature gives the customer the flexibility to align the preheating frequency to the filament power in the
preheating phase. Figure 29 shows a standard start-up with the set preheating time of, for example, 820 ms with
an 8.2 kΩ resistor at the RTPH pin 11. To force the IC to remain in preheating, the voltage level at the RTPH pin 11
has to be set to 5.0 V. The duration of this 5.0 V signal defines the time of the preheating (see I_PreHeat in Figure 30).
V_CC
17.5 V
16.0 V
14.0 V
Chip Supply Voltage
10.6 V
Start Up
V_RTPH ^UVLO _Hysteresis
5.0 V
2.5 V
IPre H ea t
Duration is set by
Resistor only
V_Lamp
Preheating
t = 820 ms when using
RRTPH = 8.2kOhm
IGNITION
Time
Time
Time
Time
Figure 29 Start-Up WITH Preheating
V_CC
17.5 V
16.0 V
14.0 V
10.6 V
Start Up
VRTPH ^UVLO _Hysteresis
5.0 V
2.5 V
I_{Pre H e a t}
V_Lamp
Chip Supply Voltage
Set by external 5.0V Signal
IC remains in Preheating
NO Ignition
Time
Time
Time
Time
Figure 30 Start-Up WITHOUT Preheating
Final Data Sheet
34
V1.1, 2013-08-14