ICB2FL03G Datasheet, PDF (29/60 Pages) Infineon Technologies AG – 2nd Generation FL Controller for Fluorescent Lamp Ballasts

ICB2FL03G
Controller for Fluorescent Lamp Ballasts
Functional Description
Lamp Voltage vs Frequency @ different Modes
1000
900
800
700
600
500
400
300
200
100
0
10000
1000
Area of Capacitive
Load Behavior
900
Area of Inductive ₈₀₀
Load Behavior
700
IGNITION
600
500
400
300
Load
PRE Run
and
RUN Mode
After
IGNITION
Frequency [Hz]
200
100
Pre Heating
0
100000
After Ignition Before Ignition
Figure 21 Capacitive and Inductive Operation
2.6.1 Capacitive Load 1 (Idling Detection – Current Mode Preheating)
A capacitive load 1 operation (idling) is detected when the voltage at the LSCS pin is below +50 mV during the
second 50 % ON time of the low side MOSFET (see capacitive load 1 (idling) in Figure 22). If this status is present
for longer than 2500 ms, the controller triggers a latched power-down mode after trying a single restart. The
controller keeps monitoring the status continuously until an adequate load is present (e.g. lamp removal); then the
IC changes to normal operation.
Capacitive Load 1 Operation (Ballast with Current Mode Preheating)
Normal Operation
Capacitive Load 1 (Idling)
V_DSLS
I_DSLS
VGateHS
V_GateLS
VLSCS
+ 50 mV
2nd 50%
ON Time
V_DSLS
IDSLS
V_GateHS
VGateLS
V_LSCS
+ 50 mV
2nd 50%
ON Time
Figure 22
t_{CAPLOAD 1} t_{CAPLOAD 2}
tCAPLOAD 1
Capacitive Mode 1 Operation without Load during Run Mode
Final Data Sheet
29
V1.1, 2013-08-14