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Negative pressure output circuit [Copy link]

The circuit below is a negative voltage output circuit. The actual welding circuit has the following problems

The output voltage is set to -12V, but the actual output voltage is -8V.

Is it a problem with the TL431 feedback circuit?

How to adjust

This post is from Power technology

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There is a chip UCC28C43 in the picture, and its 7th pin is grounded, so its 5th pin cannot be connected to 24V in any way, but should be -24V.   Details Published on 2023-3-14 15:37
 
 

2w

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This picture is not quite right.

There are two VOUTs in the figure. Which VOUT voltage to ground is the -12V you want?

This post is from Power technology
 
 
 

2w

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There is a chip UCC28C43 in the picture, and its 7th pin is grounded, so its 5th pin cannot be connected to 24V in any way, but should be -24V.

This post is from Power technology
 
 
 

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