ICB2FL03G Datasheet, PDF (15/60 Pages) Infineon Technologies AG – 2nd Generation FL Controller for Fluorescent Lamp Ballasts

ICB2FL03G
Controller for Fluorescent Lamp Ballasts
Functional Description
Frequency /
Lamp Voltage
135 kHz
100 kHz
50 kHz
1
42 kHz
0 kHz
Rated BUS
Voltage VBUS
60ms
100 %
95 %
2
35ms
Frequency
3
4
5
80ms 11ms
Lamp Voltage
0 - 2500 ms
6
40 - 237ms
Rated BUS Voltage
7
625 ms
8
Mode /
Time
30 %
Chip Supply
Voltage VCC
VCC = 17.5 V
VCC = 14.0 V
Chip Supply Voltage
Mode /
Time
VCC = 10.6 V
VCC = 0 V
UVLO
Monitoring Start Up Soft Start Preheating
Ignition
Pre-Run
Mode /
Time
Run Mode
into normal Operation
Figure 4 Typical Startup Procedure in Run Mode (in Normal Operation)
Followed at the end of the start-up hysteresis (phase 2, Figure 4) V_CC > 14.0 V and before phase 3 is active, a
second level of detection activity senses for 130 μs (propagation delay of the IC) whether the bus voltage is
between 12.5 % and 105 %. If the previous bus voltage conditions are fulfilled and the filaments are detected, the
IC starts the operation with an internally fixed startup frequency of typically 135 kHz (all gates are active). If the
bus voltage reaches a level of 95 % of the rated bus voltage within 80 ms at the latest (phase 3, Figure 4), the IC
enters the soft start phase. During soft start (phase 4 , Figure 4), the start-up frequency shifts from 135 kHz down
to the set preheating frequency (Section 2.2.2). In the soft start phase, the lamp voltage rises and the chip supply
voltage reaches its working level from 10.6 V < V_CC < 17.5 V. After the soft start has finished, the IC enters the
preheating mode (phase 5, Figure 4) for preheating the filaments (adjustable time) in order to extend the life cycle
of the FL filaments. On finishing preheating, the controller starts ignition (phase 6, Figure 4). During the ignition
phase, the frequency decreases from the set preheating frequency down to the set operation frequency
(adjustable, see Section 2.2.2). If ignition is successful, the IC enters the pre-run mode (phase 7, Figure 4).
This mode is provided in order to prevent a malfunction of the IC due to an unstable system – e.g., the lamp
parameters are not in a steady state condition. After finishing the 625 ms pre-run phase, the IC switches over to
the run mode (phase 8, Figure 4) with complete monitoring.
Final Data Sheet
15
V1.1, 2013-08-14