參數(shù)資料
型號： ICE3B5565I
廠商： INFINEON TECHNOLOGIES AG
英文描述： TVS UNIDIRECT 400W 120V SMA
中文描述： 離線式開關(guān)電源電流模式控制器，集成了?650V啟動單元/的CoolMOS
文件頁數(shù)： 17/30頁
文件大?。?/td> 1223K
代理商： ICE3B5565I
CoolSET-F3
Functional Description
Version 1.3
17
15 Sep 2004
blocks C12 by the gate G10. Maximum current can now
be provided to stabilize V
OUT
.
Figure 19
Signals in Active Burst Mode
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:
VCC Overvoltage
Overtemperature
Overload
Open Loop
VCC Undervoltage
Short Optocoupler
Protection Mode (Auto Restart Mode)
Figure 20
Auto Restart Mode
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 is can only active during Soft
Start Phase(SoftS<4.0V) and when FB signal is
outside the operating range > 4.8V. Therefore any
small voltage overshoots of V
during normal
operating cannot trigger 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 8.0
μ
s.
The other fault detection which can result in the Auto
Restart Mode and has this 8.0
μ
s blanking time is the
Overtemperature detection. This block checks for a
junction temperature of higher than 140°C for
malfunction operation.
1.32V
4.00V
3.40V
4.80V
V
FB
4.40V
5.40V
V
SoftS
t
t
0.257V
1.00V
V
CS
8.5V
V
VCC
t
t
1.05mA
I
VCC
t
7.2mA
V
OUT
t
Max. Ripple < 1%
Blanking Wndow
Current limit level during
Active Burst Mode
Entering Active
Burst Mode
Leaving Active
Burst Mode
C11
C1
17V
C
SoftS
C3
5.4V
C4
4.8V
R
SoftS
Auto Restart
Mode
&
G5
&
G1
Thermal Shutdown
T
j
>140°C
4.4V
S1
6.5V
VCC
Control Unit
5k
4.0V
SoftS
FB
Voltage
Reference
Spike
Blanking
8.0us
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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