ICLS8082G Infineon Technologies, ICLS8082G Datasheet - Page 14

• Manufacturer Part Number: ICLS8082G
• Manufacturer: Infineon Technologies

Specifications of ICLS8082G

• Packages: PG-DSO-12
• Vds: 800V
• Rds (on): 2,26

3.8
Cycle-by-cycle current limitation is realized by the current limit comparator to provide overcurrent detection. The
source current of the MOSFET is sensed via a sense resistor R
transformed to a sense voltage V
adjusted according to the mains voltage, the comparator immediately turns off the gate drive.
To protect the current limitation process from distortions caused by leading edge spikes, a leading edge blanking
time (t
A further comparator is implemented to detect dangerous current levels (V
transformer windings are shorted or if the secondary diode is shorted. To avoid accidental latch-off, a spike
blanking time of t
3.9
When the main bus voltage increases, the switch-on time becomes shorter and therefore the operating frequency
is also increased. As a result, for a constant primary current limit, the maximum possible output power is increased,
which the converter may not have been designed to support.
To avoid such a situation, the internal foldback point correction circuit varies the V
bus voltage. This means the V
input power of the converter, the required maximum V
is shown in
Figure 6) Variation of the VCS limit voltage according to the IZC current
Data Sheet
LEB
) is integrated into the current sensing path.
Figure
Current Limitation
Foldback Point Correction
0.9
0.8
0.7
0.6
CSSW
1
6.
80 100 120 140 160 180 200 220 240 260 280 300 320 340 360 380 400
is integrated into the output path of the comparator.
CS
will be decreased when the bus voltage increases. To keep a constant maximum
CS
, which is fed to the pin CS. If the voltage V
CS
Offline LED Controller For PFC and Dimming
14
versus various input bus voltage can be calculated, which
Vin(V)
CS
. By means of R
CSSW
CS
) which could occur if one or more
exceeds an internal voltage limit,
CS
voltage limit according to the
CS
Functional Description
the source current is
Rev1.0, 2011-03-01
ICLS8082G