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| ICE3AR2280VJZ Datasheet, PDF (24/43 Pages) Infineon Technologies AG – Of f -Line SMPS Cur rent Mode Cont rol ler wi th integrated 800V | |||
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VFBB
4.0V
3.5V
3.2V
VFB_burst
Entering
Active Burst
Mode
Blanking Timer
20ms Blanking Time
Leaving Active
Burst Mode
t
VCS
t
Vcsth
Current limit level during
Active Burst Mode
Vcsth_burst
VVCC
t
10.5V
IVCC
t
5.7mA
620uA
VOUT
t
CoolSET⢠F3R80
ICE3AR2280VJZ
Functional Description
t
Figure 27: Signals in Active Burst Mode
3.7.3 Protection Modes
The IC provides Auto Restart mode as the major protection feature. Auto Restart mode can prevent the SMPS from
destructive states. There are 3 kinds of auto restart mode; normal auto restart mode, odd skip auto restart mode
and non switch auto restart mode. Odd skip auto restart mode is that there is no detect of fault and no switching
pulse for the odd number restart cycle. At the even number of restart cycle the fault detect and soft start switching
pulses maintained. If the fault persists, it would continue the auto-restart mode. However, if the fault is removed,
it can release to normal operation only at the even number auto restart cycle (Figure 28).
VVCC
Fault
detected
No detect
Startup and detect
No detect
17V
10.5V
VCS
t
t
Figure 28: Odd skip auto restart waveform
Data Sheet
24
V2.1, 2013-10-22
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