ICE2AS01 Infineon Technologies, ICE2AS01 Datasheet - Page 13

• Manufacturer Part Number: ICE2AS01
• Description: IC OFFLINE CTRLR SMPS CM 8DIP
• Manufacturer: Infineon Technologies
• Series: CoolSET®F2r

Specifications of ICE2AS01

• Output Isolation: Isolated
• Frequency Range: 93 ~ 107kHz
• Voltage - Input: 8.5 ~ 22 V
• Operating Temperature: -40°C ~ 150°C
• Package / Case: 8-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: ICE2AS01X; ICE2AS01XK; SP000013764

Figure 20
The detection is activated by C4 when the voltage at
pin SoftS exceeds 5.3V. Till this time the IC operates in
the Soft-Start Phase. After this phase the comparator
C3 can set the Error-Latch in case of open loop or
overload which leads the feedback voltage V
exceed the threshold of 4.8V. After latching VCC
decreases till 8.5V and inactivates the IC. At this time
the external Soft-Start capacitor is discharged by the
internal transistor T1 due to Power Down Reset. When
the IC is inactive VCC increases till V
charging the Capacitor C
Resistor R
Power Up Reset and the external Soft-Start capacitor
C
Start
voltage at pin SoftS exceeds 5.3V the detection of
overload and open loop by C3 and G2 is inactive. In this
way the Start Up Phase is not detected as an overload.
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.
Datasheet
Preliminary Data
SoftS
Soft-Start
. During the Soft-Start Phase which ends when the
FB
C
Soft-Start
6.5V
is charged by the internal pullup resistor R
R
T1
Start-Up
FB-Detection
Soft-Start
6.5V
R
FB
. Then the Error-Latch is reset by
5.3V
4.8V
Power Up Reset
VCC
C4
C3
by means of the Start-Up
G2
CCon
Error-Latch
= 13.5V by
FB
Soft-
to
13
3.8.2
Figure 21
Figure 21 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 22).
16.5V
13.5V
Driver
SoftS
8.5V
5.3V
4.0V
VCC
4.8V
FB
5µs Blanking
Open loop & no load condition
Overvoltage due to open loop with
no load
Auto Restart Mode
Detection
Failure
Detection Phase
Overvoltage
Functional Description
Soft-Start Phase
Overvoltage Detection
T
ICE2AS01/S01G
ICE2BS01/S01G
Burst2
T
30 Jun 2006
Restart
t
t
t
t