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400DAFBA2 Datasheet(PDF) 23 Page - ON Semiconductor

Part # 400DAFBA2
Description  Fixed Frequency Current Mode Controller for Flyback Converters
PDF  47 Pages
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Manufacturer  ONSEMI [ON Semiconductor]
Direct Link  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

400DAFBA2 Datasheet(HTML) 23 Page - ON Semiconductor

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NCP12400
www.onsemi.com
23
Figure 50. Detailed Timing Diagram of the Device Restart after the Short ac Line Drop−out
time
VHV
SAMPLE
Comparator
Output
TSAMPLE
2
nd sample clock
pulse after last
HV edge initiates
the watch dog
signal
VHV (hyst )
Sample clock
Watch dog
signal
1
st HV edge
resets the watch
dog and starts
the peak
detection of HV
pin signal
2nd sample clock
pulse after last
HV edge initiates
the watch dog
signal
HV stop
DRV
tHV
Brown−out
detected
VHV(start )
VHV(stop )
time
VCC
VCC(on)
VCC(mini)
Device can restart after
1st Watch dog signal
when HV signal
crosses V HV(start) level
Device is stopped
Device restarts
time
time
time
time
time



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