Run the code by using the
<F8> key, or using the Run button on the toolbar.
Follow the 'Launch Real Time
Debug' of AM263x real time Debug guide to enable real time
monitoring of the expression window.
Apply an appropriate resistive
load to the PSFB system at the DC output. A load that draws around 3A to 6A
current at 12V output is a good starting point.
Set PSFB_gui_icommand_Set_Amps to
be 2.3. Set PSFB_enable to be 1.
Power the input at J1, J2 with
400V DC. Observe the voltage across the primary side of the transformer using
oscilloscope.
Slowly increase
PSFB_gui_icommand_Set_Amps to be 2.85 in increments of 0.05. Carefully observe
the output voltage(PSFB_guiLVbus_Volts), the voltage should gradually increase
to 12V. This should not be allowed to exceed the capabilities of the board.
Different waveforms, like the PWM gate drive signals, input voltage and current
and output voltage may also be probed using an oscilloscope. Appropriate safety
precautions should be taken and appropriate grounding requirements should be
considered while probing these high voltages and high currents for this isolated
DC-DC converter.
The PSFB_slope is set to be 8.
User can gradually increase or decrease it for testing.
Fully stopping the MCU when in
real-time mode is a two-step process. With the 400V DC input turned off wait a
few seconds. First, stop the processor by using the STOP button on the toolbar.
Then turn off the power supply of the MCU.