Figure 8-11. Typical Waveform in ABM Operation
Yellow = PWML, Red = Vgs of SR MOSFET, Green
= Transformer Primary Winding Current (0.2 V/A),
Blue = Switch Node Voltage
Figure 8-12. Typical Waveform in LPM Operation
Yellow = PWML, Red = PWMH, Green =
Transformer Primary Winding Current (0.2 V/A),
Blue = Switch Node Voltage
Figure 8-13. Typical Waveform in SBP1 Operation
Yellow = PWML, Red = PWMH, Green =
Transformer Primary Winding Current (0.2 V/A),
Blue = Switch Node Voltage
Figure 8-14. Typical Waveform in SBP2 Operation
Yellow = PWML, Red = PWMH, Green =
Transformer Primary Winding Current (0.2 V/A),
Blue = Switch Node Voltage
8.9 Start Up
Yellow = PWML, Red = Switch Node Voltage, Blue = Output Voltage, Green = Transformer Primary Winding
Current.
Figure 8-15. 115 V
AC
and Full Load Startup
Figure 8-16. 230 V
AC
and Full Load Startup
Performance Data and Typical Characteristic Curves
18
Using the UCC28782EVM-030 65-W USB-C PD High-Density Active-Clamp
Flyback Converter
SLUUBZ3B – MAY 2020 – REVISED AUGUST 2020
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