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Visitor II
March 26, 2025
Question

L6599 Protection

  • March 26, 2025
  • 0 replies
  • 487 views

 

Hi.

I am using the L6599AD without PFC.

Previously, the DIS pin was connected to the DELAY pin and used as a SHUTDOWN.
However, the frequent peak current caused SHUTDOWN.
So I connected the DIS pin to GROUND and made it work in HICCUP MODE.

However, the problem is that the shutdown still occurs once in a while (I haven't confirmed it directly, but it happened in the field).
HICCUP MODE cannot be a SHUTDOWN.

So, the situations that can cause a shutdown in HICCUP MODE are
1. output short(ocp)
2. INPUT VOLTAGE(Low)
I think there are 2 things.

Can you give me any advice or situations other than these two?