ICE3AS02 Infineon Technologies, ICE3AS02 Datasheet - Page 14

• Manufacturer Part Number: ICE3AS02
• Description: IC OFFLINE CTRLR SMPS CM 8DIP
• Manufacturer: Infineon Technologies
• Series: CoolSET®F3r

Specifications of ICE3AS02

• Output Isolation: Isolated
• Frequency Range: 92 ~ 108kHz
• Voltage - Input: 8.5 ~ 22 V
• Voltage - Output: 500V
• Power (watts): 900mW
• Operating Temperature: -25°C ~ 130°C
• Package / Case: 8-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: ICE3AS02X; ICE3AS02XK; SP000015084

gate G10. Maximum current can now be provided to
stabilize V
Figure 17
Version 1.2
1.05mA
0.257V
4.80V
4.00V
3.40V
7.2mA
1.32V
V
5.40V
1.00V
8.5V
V
V
4.40V
V
V
I
VCC
SoftS
OUT
FB
CS
VCC
OUT
Current limit level during
Active Burst Mode
Blanking W indow
.
Max. Ripple < 1%
Signals in Active Burst Mode
Entering Active
Burst Mode
Leaving Active
Burst Mode
ICE3AS02 / ICE3AS02G / ICE3BS02 / ICE3BS02G
t
t
t
t
t
t
14
3.6.3
In order to increase the SMPS system’s robustness and
safety, the IC provides the Auto Restart Mode as a protection
feature. The Auto Restart Mode is entered upon detection of
the following faults in the system:
•
•
•
•
•
•
Figure 18
The VCC voltage is observed by comparator C1 if 17V is
exceeded. The output of C1 is combined with both the output
of C11 which checks for SoftS<4.0V, and the output of C4
which checks for FB>4.8V. Therefore the overvoltage
detection
Phase(SoftS<4.0V) and when FB signal is outside the
operating range > 4.8V. This means any small voltage
overshoots of V
the Auto Restart Mode.
In order to ensure system reliability and prevent any false
activation, a blanking time is implemented before the IC can
enter into the Auto Restart Mode. The output of the VCC
overvoltage detection is fed into a spike blanking with a time
constant of 8.0µs.
The other fault detection which can result in the Auto Restart
Mode and has this 8.0µs blanking time is the
Overtemperature detection. This block checks for a junction
temperature of higher than 140°C for malfunction operation.
SoftS
VCC Overvoltage
Overtemperature
Overload
Open Loop
VCC Undervoltage
Short Optocoupler
C
FB
SoftS
S1
is
4.4V
Protection Mode (Auto Restart Mode)
5k
Auto Restart Mode
VCC
can
5.4V
VCC
4.0V
4.8V
17V
during normal operating cannot trigger
R
only
SoftS
C1
C4
C3
C11
Functional Description
active
6.5V
Thermal Shutdown
G1
&
T
j
>140°C
G5
during
&
Blanking
Spike
8.0us
02 Sep 2005
Control Unit
Auto Restart
Soft
Reference
Voltage
Mode
Start
F3