UCC27531: Can I make "ground of UCC27531 negative and shift the IN and EN signals accordingly?

Naser S.

Part Number: UCC27531

Team: Can I make "ground of UCC27531 negative and shift the IN and EN signals accordingly?
For example:
GND=-10V, VDD= 5V,
IN and EN=-10V to -7V
Output= -10V to 5V

Thanks.

over 7 years ago

0 Jeffrey Mueller over 7 years ago

TI__Genius 12990 points

Hi Naser,

This can be done! This is the whole purpose for a large VDD input range and is essential when driving a noisy IGBT.
As you said a level shifter for the input will be needed. let me know if you have any more questions.

Thanks,

0 Jeffrey Mueller over 7 years ago in reply to Jeffrey Mueller

TI__Genius 12990 points

Check out these app notes highlighting negative drive using 531:

Figure 5
www.ti.com/.../slua770a.pdf

Figure 2
www.ti.com/.../slua169a.pdf

Thanks,

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UCC27531: Can I make "ground of UCC27531 negative and shift the IN and EN signals accordingly?