bucks in parallel

[void May 11, 2022 at 5:40 am Post count: 0]

#92801 Reply |

Suppose I have 3x of the 5V-30V DC-DC 4A buck converters wired up in parallel.

Say first buck the load is drawing like 3.9A (near max) and 5V, other two are drawing say ~2.4A (at 8.5V and 12V respectively).

What happens if one of the bucks fails?  Is there a “cascading current” problem?

Not just at runtime – but say even on startup/powerup and natural variations, suppose one ends up with too much current and turns itself offline.

I can’t really imagine it being a problem (to the loads), but was just curious on thoughts about it.

[DrokKeymaster May 11, 2022 at 8:12 am Post count: 2971]

#92805 Reply |

Hello

Do you mean the output port of buck converters are connected in parallel？ We don’t recommend parallel connection. It may be easy to damage some of them.

Best regards,

 

[void May 12, 2022 at 6:14 am Post count: 0]

#92842 Reply |

No, on the input (at say 19V / 4A)

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