3.2.3.4.2.6 Run the Code

1. Refer to steps 1-6 in Section 3.2.3.2.2.6 from lab two to start the operation of the power stage.
2. Adjust the load current to various steps in the range 1A - 15A, for each step recording the input voltage and current as well as the output current and voltage reported on the test instruments. From these measurements the efficiency can be calculated. If a power analyzer is available, the efficiency can be directly observed.
3. The efficiency will be much better for loads in the 1-10A range with the phase shedding and synchronous rectification thresholds enabled. It should be greater than 90% for all loads greater than 10% of the max load.
4. If desired, go back to lab 2 and repeat the efficiency measurements without the phase shedding and synchronous rectification thresholds enabled.
5. Turn OFF the 390-V DC power supply.
6. Fully halting the MCU when in real-time mode is a two-step process. First, halt the processor by using the Suspend button ( ) on the toolbar or Run → Suspend. Click button again to take the MCU out of real-time mode and then reset the MCU (Run → Reset → CPU Reset).
7. Close CCS.

End of exercise.