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NCP1237 Scheda tecnica(PDF) 24 Page - ON Semiconductor

Il numero della parte NCP1237
Spiegazioni elettronici  Fixed Frequency Current Mode Controller for Flyback Converters
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NCP1237 Scheda tecnica(HTML) 24 Page - ON Semiconductor

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The typical level at which this transient peak timer starts
is VCS(tran) = 0.5 V, which gives half the maximum output
power in DCM.
The duration of the transient peak timer is ttran (168 ms
typical). Figures 21 and 22 show the operation of the
transient peak timer in two different peak power conditions.
Figure 21. Transient Peak Power Delivery
time
DRV
time
Output Load
Max transient Load
time
Timer duration
ttran
Transient
peak timer
starts
Transient peak
timer discharges
tfault
Transient
peak power
Max continuous Load



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