NCP1377_06 ONSEMI [ON Semiconductor], NCP1377_06 Datasheet - Page 13

• Manufacturer Part Number: NCP1377_06
• Description: PWM Current−Mode Controller for Free−Running Quasi−Resonant Operation
• Manufacturer: ONSEMI [ON Semiconductor]

Figure 29. This plot gathers waveforms captured at three different operating points:
1
2
the second valley.
3
further expand the burst as Pout goes low.
Figure 30. This picture explains how the 200 mA internal offset
st
nd
rd
Upper Plot: Free run, valley switching operation, Pout = 26 W.
Lowest Plot: The skip slices the second valley pattern and will
Middle Plot: Min Toff clamps the switching frequency and selects
Current Sense Pin (200 mV/pin)
current creates the skip cycle level.
Vrsense (200 mV/div)
200 mA x Rskip
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13
Vgate (5 V/div)