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400DAFBA2 Datasheet(PDF) 27 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) 27 Page - ON Semiconductor

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NCP12400
www.onsemi.com
27
Figure 54. HV Pin ac Input Timing Diagram with X2 Capacitor Discharge Sequence when the Application is
Unplugged Under Extremely Low Line Condition
time
VHV
One Shot
time
DRV
VHV(start)
Starts
only at
VCC(on)
VHV(stop)
HV
timer
starts
tDET
Brown−out
HV
timer
restarts
tHV
X2 discharge
current
tDIS
X2 discharge
No AC detection
AC line unplug
X2 capacitor
discharge
AC line Unplug
detector starts
time
VCC
VCC(on)
VCC(min)
VCC(dis)
time
time



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