Enpirion
®
Power Evaluation Board User Guide
EN6360QI PowerSoC
Test Recommendations
Recommendations
To guarantee measurement accuracy, the following precautions should be
observed:
1. Make all input and output voltage measurements at the board using the
surface-mount test points provided. This will eliminate voltage drop
across the line and load cables that can produce false readings.
2. Measure input and output current with series ammeters or accurate
shunt resistors. This is especially important when measuring efficiency.
3. Use a low-loop-inductance probe tip shown below to measure V
OUT
and switching signals to avoid noise coupling into the probe ground
lead. Output ripple and load transient deviations are conveniently
measured at TP19. For more accurate ripple measurement, please
refer to Enpirion App Note regarding this subject
(
www.altera.com/enpirion
).
4. The board includes a pull-up for the POK signal and ready to monitor
the power OK status.
5. A soft-start capacitor is populated on the board to provide a reasonable
soft-start time. It can be changed as needed.
6. The over-current protection circuit typically limits the maximum load
current to approximately 14.5A.
Input and Output Capacitors
Please refer to the BOM section for the value of input caps and output caps used
on this evaluation board, which is the result of combination for better
performance and smaller footprints.
NOTE:
Capacitors must be X5R or X7R dielectric formulations to ensure
adequate capacitance over operating voltage and temperature ranges.
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