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fedeja
fedeja
Visitor II
February 11, 2016
Question

L6470 protection

  • February 11, 2016
  • 1 reply
  • 480 views
Posted on February 11, 2016 at 13:22

Hi,

I have a question regarding L6470 protection.

Are any protection diodes needed on the L6470 outputs?

The datasheet doesn't mention any protection and the evaluation boards doesn't have any. This is the case also with the L6480.

Thank you very much

#l6470
This topic has been closed for replies.

1 reply

re.wolff9
re.wolff9
Senior
February 13, 2016
Posted on February 13, 2016 at 20:08

The output mosfets will have a parasitic diode connected in the direction that you'd place a protection diode. So if the output stage can tolerate the 0.6V voltage drop during the ''mosfet off'' time with respect to ''becoming too hot'', then I think you'll be fine without those diodes. (and those external diodes better have a lower drop than the internal ones or else your diodes will not make a difference. )

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