EVALSF3-ICE3B0565 Infineon Technologies, EVALSF3-ICE3B0565 Datasheet - Page 12

• Manufacturer Part Number: EVALSF3-ICE3B0565
• Description: BOARD DEMO ICE3B0565 15W SMPS
• Manufacturer: Infineon Technologies
• Series: CoolSET®F3r

Specifications of EVALSF3-ICE3B0565

• Main Purpose: AC/DC, Primary Side
• Outputs And Type: 1, Isolated
• Power - Output: 12W
• Voltage - Output: 12V
• Current - Output: 1A
• Voltage - Input: 85 ~ 265VAC
• Regulator Topology: Flyback
• Frequency - Switching: 67kHz
• Board Type: Fully Populated
• Utilized Ic / Part: ICE3B0565
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: EVALSF3-ICE3B0565IN

The internal Voltage Reference is switched off if Auto
Restart Mode is entered. The current consumption is then
reduced to 300µA.
Once the malfunction condition is removed, this block will
then turn back on. The recovery from Auto Restart Mode
does not require disconnecting the SMPS from the AC line.
When Active Burst Mode is entered, the internal Bias is
switched off in order to reduce the current consumption to
below 1.05mA while keeping the Voltage Reference active
as this is necessary in this mode.
3.3
Figure 7
At the beginning of the Startup Phase, the IC provides a Soft
Start duration whereby it controls the maximum primary
current by means of a duty cycle limitation. A signal V
which is generated by the external capacitor C
combination with the internal pull up resistor R
determines the duty cycle until V
When the Soft Start begins, C
to approx. 1V by T2. Therefore the Soft Start Phase takes
place between 1V and 4V. Above V
longer duty cycle limitation DC
comparator C7 since comparator C2 blocks the gate G7 (see
Version 2.0
SoftS
C
SoftS
Startup Phase
4V
0.85V
Soft Start
Soft Start
R
SoftS
3.25kΩ
C7
C2
PWM OP
T2
SoftS
Comparator
Soft-Start
max
SoftS
is immediately charged up
x3.7
which is controlled by
G7
exceeds 4V.
SoftsS
&
T3
= 4V there is no
Gate Driver
1V
6.5V
Softs
CS
SoftS
SoftS
in
,
12
Figure 7). This maximum charge current in the very first
stage when V
Figure 8
By means of this extra charge stage, there is no delay in the
beginning of the Startup Phase when there is still no
switching. Furthermore Soft Start is finished at 4V to have
faster the maximum power capability. The duty cycles DC
and DC
inductance of the transformer. The limitation of the primary
current by DC
to a maximum primary current which is limited by the
internal Current Limiting with CS = 1V. Therefore the
maximum Startup Phase is divided into a Soft Start Phase
until t1 and a phase from t1 until t2 where maximum power
is provided if demanded by the FB signal.
DC
5.4V
4V
1V
V
DC
DC
SoftS
max
1
2
2
max. Soft Start Phase
are depending on the mains and the primary
SoftS
2
Startup Phase
is related to V
is below 1V, is limited to 1.32mA.
max. Startup Phase
Functional Description
t1
SoftS
= 4V. But DC
CoolSET™-F3
24 Aug 2005
1
is related
t2
t
t
1