ICE2A280ZXK Infineon Technologies, ICE2A280ZXK Datasheet - Page 16

• Manufacturer Part Number: ICE2A280ZXK
• Manufacturer: Infineon Technologies

Specifications of ICE2A280ZXK

• Number Of Pwm Outputs: 1
• On/off Pin: No
• Adjustable Output: No
• Topology: Flyback
• Switching Freq: 107KHz
• Duty Cycle: 77%
• Operating Supply Voltage (max): 21V
• Output Current: 2000A
• Output Voltage: 800V
• Synchronous Pin: No
• Rise Time: 30ns
• Fall Time: 30ns
• Operating Temperature Classification: Automotive
• Mounting: Through Hole
• Pin Count: 7
• Package Type: PDIP
• Lead Free Status / Rohs Status: Compliant

But the Soft-Start Phase must be finished within the
Start Up Phase to force the voltage at pin FB below the
failure detection threshold of 4.8V.
3.8.2
Figure 23
Figure 23 shows the Auto Restart Mode for open loop
and no load condition. In case of this failure mode the
converter output voltage increases and also VCC. An
additional protection by the comparators C1, C2 and
the AND-gate G1 is implemented to consider this
failure mode (see Figure 24).The overvoltage detection
is provided by Comparator C1 only in the first time
during the Soft-Start Phase till the Soft-Start voltage
exceeds the threshold of the Comparator C2 at 4.0V
and the voltage at pin FB is above 4.8V. When VCC
exceeds 16.5V during the overvoltage detection phase
C1 can set the Error-Latch and the Burst Phase during
Auto Restart Mode is finished earlier. In that case
T
Version 2.6
Burst2
16.5V
13.5V
Driver
SoftS
8.5V
5.3V
4.0V
VCC
4.8V
FB
is shorter than T
5µs Blanking
Open loop & no load condition
Overvoltage due to Open Loop with
No Load
Auto Restart Mode
Detection
Failure
Detection Phase
Overvoltage
Soft-Start
Soft-Start Phase
Overvoltage Detection
T
Burst2
. By means of C2 the
T
Restart
t
t
t
t
16
normal operation mode is prevented from overvoltage
detection due to varying of VCC concerning the
regulation of the converter output. When the voltage
V
deactivated.
Figure 24
3.8.3
Thermal Shut Down is latched by the Error-Latch when
junction temperature T
exceeding an internal threshold of 140°C. In that case
the IC switches in Auto Restart Mode.
Note:
SoftS
SoftS
C
Soft-Start
is above 4.0V the overvoltage detection by C1 is
All the values which are mentioned in the
functional description are typical. Please refer
to Electrical Characteristics for min/max limit
values.
6.5V
Thermal Shut Down
Overvoltage Detection
T1
R
VCC
Soft-Start
16.5V
4.0V
Functional Description
j
Power Up Reset
C1
C2
of the pwm controller is
CoolSET™-F2
G1
25 Dec 2006
Error Latch