NCP1377, NCP1377B
Figure 29. This plot gathers waveforms captured at three different operating points:
1st Upper Plot: Free run, valley switching operation, Pout = 26 W.
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nd Middle Plot: Min Toff clamps the switching frequency and selects
the second valley.
rd Lowest Plot: The skip slices the second valley pattern and will
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further expand the burst as Pout goes low.
Vrsense (200 mV/div)
Vgate (5 V/div)
200 mA x Rskip
Current Sense Pin (200 mV/pin)
Figure 30. This picture explains how the 200 mA internal offset
current creates the skip cycle level.
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