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400DBDBB2 データシート(PDF) 23 Page - ON Semiconductor

部品番号 400DBDBB2
部品情報  Fixed Frequency Current Mode Controller for Flyback Converters
PDF  47 Pages
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メーカー  ONSEMI [ON Semiconductor]
ホームページ  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

400DBDBB2 データシート(HTML) 23 Page - ON Semiconductor

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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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