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NCP1237 Scheda tecnica(PDF) 22 Page - ON Semiconductor

Il numero della parte NCP1237
Spiegazioni elettronici  Fixed Frequency Current Mode Controller for Flyback Converters
PDF  34 Pages
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Produttore elettronici  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
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NCP1237 Scheda tecnica(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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