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NCP1237 Datasheet(PDF) 24 Page - ON Semiconductor

Part # NCP1237
Description  Fixed Frequency Current Mode Controller for Flyback Converters
PDF  34 Pages
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Manufacturer  ONSEMI [ON Semiconductor]
Direct Link  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

NCP1237 Datasheet(HTML) 24 Page - ON Semiconductor

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NCP1237
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24
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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