ICLS6022G Infineon Technologies, ICLS6022G Datasheet - Page 16

• Manufacturer Part Number: ICLS6022G
• Manufacturer: Infineon Technologies

Specifications of ICLS6022G

• Packages: PG-DSO-12
• Vds: 650V
• Rds (on): 4,70

As a consequence of this extra charge stage, there is no delay at the beginning of the startup phase when there
is still no switching. Furthermore, soft start is finished at 3.2 V to have maximum power capability even earlier. The
duty cycles DC
of the primary current by DC
which is limited by the internal current limiting function with CS = 1 V. Therefore the maximum startup phase is
divided into a soft start phase until t1 and a phase from t1 to t2 during which maximum power is provided if
demanded by the FB signal.
3.4
Figure 8
3.4.1
The oscillator generates a fixed frequency with frequency jittering of ± 4 % from the fixed frequency (i.e., ± 2.7 kHz
for 67 kHz) at a jittering period T
A resistor, a capacitor, a current source and current sink for determining the frequency are integrated. The
charging and discharging current of the implemented oscillator capacitor are internally trimmed in order to achieve
a very accurate switching frequency. The ratio of controlled charge to discharge current is adjusted to reach a
maximum duty cycle limitation of D
Once the soft start period is over and the IC has entered normal mode, the soft start capacitor is charged and
discharged through the internal current source I
which is externally adjustable by means of the soft start capacitor, C
where k
For example: T
Data Sheet
FJ
is a constant = 4 ms/µF.
Oscillator and Jittering
PWM Section
PWM section
1
FJ
and DC
= 4 ms if C
2
vary according to the mains and the primary inductance of the transformer. The limitation
SoftS
2
is related to V
FJ
= 1µF.
. The switching frequency is f
max
Comparator
Comparator
SoftS
Soft Start
Current
Limiting
= 0.75.
PWM
Frequency
Oscillator
Clock
Cycle
Jitter
Duty
max
SoftS
T
FJ
= 3.2 V. However, DC
FJ
=
to generate a triangular waveform with a jittering period T
0.75
k
G8
FJ
1
16
∗
C
S
R
SoftS
FF1
Q
switch
PWM Section
Gate Driver
G9
&
SoftS
= 67 kHz.
Gate
1
is related to a maximum primary current,
(see
Figure
LED System Driver ICs
6).
Functional Description
Version 1.0, 2011-05-19
ICLS6x Series
(1)
FJ
,