ICB2FL03G Datasheet, PDF (33/60 Pages) Infineon Technologies AG – 2nd Generation FL Controller for Fluorescent Lamp Ballasts

ICB2FL03G
Controller for Fluorescent Lamp Ballasts
Functional Description
2.8.1.1 Skip the Preheating Phase – Set RTPH Pin to GND
Figure 27 shows a standard start-up with a preheating time set via resistor at the RTPH pin 11 to GND (e.g. 8.2 kΩ
– this is equal to a preheating phase of approx. 820 ms). The preheating phase can be skipped by setting the
RTPH pin 11 directly to GND. In this case, ignition takes place directly after the soft start phase (see Figure 28).
V_CC
17.5 V
16.0 V
14.0 V
Standard Start UP with Pre Heating
Chip Supply Voltage
10.6 V
Start Up
VRTPH ^UVLO Hysteresis
5.0 V
2.5 V
Duration of Pre Heating
is set by Resistor only
VLSGD
10.0 V
Time
Time
VLamp
PRE HEATING
t = 820 ms when using
RRTPH = 8.2kOhm
Figure 27 Start-Up WITH Preheating
VCC
17.5 V
16.0 V
14.0 V
10.6 V
Start UP without Pre Heating
Chip Supply Voltage
Start Up
VRTPH ^UVLO Hysteresis
5.0 V
2.5 V
VLSGD
10.0 V
Set RTPH Resistor to GND
Time
Time
Time
Time
VLamp
INGNITION directly
Time
Time
Figure 28 Start-Up WITHOUT Preheating
Final Data Sheet
33
V1.1, 2013-08-14