protection diodes in LM317 circuits

jarthel · 14th September 2006, 02:29 PM

Hi.
In the LM317 datasheet, it talks about using protection diodes (facing from output pin to input pin) when the output cap is more than 25uF.

The suggested diode is 1N4002 which is quite common.

My question now is: Can I use other dioes? I already have some ultrafast Onsemi (MUR1100) and wondering if I can use this instead.

Thank you for the help

john curl · 14th September 2006, 07:12 PM

You can, but it might waste the potential use of the diode for a more useful purpose.

jarthel · 14th September 2006, 10:28 PM

Quote:

Originally posted by john curl
You can, but it might waste the potential use of the diode for a more useful purpose.

thanks for the reply. I got plenty of the onsemis so it's more wasteful not to use them

14th September 2006, 02:29 PM	#1
jarthel diyAudio Member Join Date: Jan 2002 Location: somewhere in Australia	protection diodes in LM317 circuits Hi. In the LM317 datasheet, it talks about using protection diodes (facing from output pin to input pin) when the output cap is more than 25uF. The suggested diode is 1N4002 which is quite common. My question now is: Can I use other dioes? I already have some ultrafast Onsemi (MUR1100) and wondering if I can use this instead. Thank you for the help

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14th September 2006, 07:12 PM	#2
john curl diyAudio Member Join Date: Jul 2003 Location: berkeley ca	You can, but it might waste the potential use of the diode for a more useful purpose.

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