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DC DC Regulator Loading

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Rahul Soni

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Hi,
Can anyone tell me what will be the effect if I design my buck regulator to provide 20Amps current but use only 3-5 Amps of current?
I am designing a board with 24 SSDs that require about 20Amps of current at 5V. Now suppose I intend to use only 3,4 drives and it takes only 2-3 Amps current. In that case what will be the effect on DC DC regulator. How will it behave.

Thanks in advance.
 

If this is your 1st SMPS design, you might consider an inexpensive PC PSU.
Historically older designs required 10% minimum load for stability. There are at least a dozen requirements to consider before you start a design.
 

Rahul Soni said:
I am designing a board with 24 SSDs that require about 20Amps of current at 5V. Now suppose I intend to use only 3,4 drives and it takes only 2-3 Amps current.
Click to expand...

To answer this question... If you have a circuit to regulate output voltage, it will automatically reduce duty cycle so that the inductor draws a smaller Ampere level.

If there is no regulating circuitry, the output voltage will rise.
 

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