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NCP1237 Datasheet(PDF) 22 Page - ON Semiconductor

No. de pieza NCP1237
Descripción Electrónicos  Fixed Frequency Current Mode Controller for Flyback Converters
PDF  34 Pages
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Fabricante Electrónico  ONSEMI [ON Semiconductor]
Página de inicio  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

NCP1237 Datasheet(HTML) 22 Page - ON Semiconductor

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NCP1237
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22
In the latched version (Figure 19), the controller can
restart only if a brown−out or a VCC reset occurs. In a real
application this can only happen if the power supply is
unplugged from the mains line.
Figure 19. Latched Timer−Based Overcurrent Protection
time
Fault Flag
time
VCC
time
DRV
VCC(on)
VCC(min)
Overcurrent
applied
time
Output Load
Max Load
time
Fault timer
tfault
Fault
timer
starts
Controller
latches off
No restart
when fault
disappears
tfault



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