What schottky for rectifing 5-9v supply

wazzup · 19th February 2003, 08:47 PM

Ok get yourself some schottyky`s they said.... There are only 500 different ones!

I`m building a 5 and 9 volt supply for a cd player, using 9v toroids, and a 15v toroid. The maximum current will not exeed 2A

What schottky`s should do the trick? Are there things I should look in to, like ...?

And another question; for the lm317, I have to use resistors, to get to 5 and 9 volt. I`m thinking of using tantaan resistors (is that in english tantal?) does that have ANY bennifits, over using other (metal film?) resistors?

The ordering of some components, gives me a headache!

tnx in advance guys.

JBL · 19th February 2003, 09:04 PM

tantalum resistor are fragile and are not recommended becaus of that.

wazzup · 19th February 2003, 09:05 PM

But do they have any bennifits over other resistors?

JBL · 19th February 2003, 09:10 PM

Probably not, I really don't see what could be better in a tantalum resistor.

Using good quality metal film resistor is enough.

(IMO they could be worst than standard resistor but this is just my opinion)

wazzup · 19th February 2003, 09:16 PM

And the schottky diodes... Which ones should ik use? I have no idea what to look for.

till · 19th February 2003, 09:33 PM

I use MBR10100.

you could look here:
http://parametric.fairchildsemi.com/ss.asp?FAM=Schottky

f.e.:
http://parametric.fairchildsemi.com/...84,14534,14569

Jeff R · 20th February 2003, 03:05 PM

I use a lot of 1N5822's. They are 3A, 40 volt devices which should be readily available. At 1 A the voltage drop is about .4 volts. I have never had any troubles with them.

I think metal film resistors will be quite adequate. No need to go overboard with an op amp circuit.

19th February 2003, 08:47 PM	#1
wazzup diyAudio Member Join Date: Jan 2003 Location: The Netherlands	What schottky for rectifing 5-9v supply Ok get yourself some schottyky`s they said.... There are only 500 different ones! I`m building a 5 and 9 volt supply for a cd player, using 9v toroids, and a 15v toroid. The maximum current will not exeed 2A What schottky`s should do the trick? Are there things I should look in to, like ...? And another question; for the lm317, I have to use resistors, to get to 5 and 9 volt. I`m thinking of using tantaan resistors (is that in english tantal?) does that have ANY bennifits, over using other (metal film?) resistors? The ordering of some components, gives me a headache! tnx in advance guys. __________________ "I`m not the messiah!"

19th February 2003, 09:04 PM	#2
JBL diyAudio Member Join Date: Aug 2001 Location: Canada, N.-B.	tantalum resistor are fragile and are not recommended becaus of that. __________________ Jonathan Blanchard (J.Bl.) ---Nothing is impossible---

19th February 2003, 09:05 PM	#3
wazzup diyAudio Member Join Date: Jan 2003 Location: The Netherlands	But do they have any bennifits over other resistors? __________________ "I`m not the messiah!"

19th February 2003, 09:10 PM	#4
JBL diyAudio Member Join Date: Aug 2001 Location: Canada, N.-B.	Probably not, I really don't see what could be better in a tantalum resistor. Using good quality metal film resistor is enough. (IMO they could be worst than standard resistor but this is just my opinion) __________________ Jonathan Blanchard (J.Bl.) ---Nothing is impossible---

19th February 2003, 09:16 PM	#5
wazzup diyAudio Member Join Date: Jan 2003 Location: The Netherlands	And the schottky diodes... Which ones should ik use? I have no idea what to look for. __________________ "I`m not the messiah!"


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19th February 2003, 09:33 PM	#6
till Banned Join Date: Apr 2002 Location: Germany, Clausthal	I use MBR10100. you could look here: http://parametric.fairchildsemi.com/ss.asp?FAM=Schottky f.e.: http://parametric.fairchildsemi.com/...84,14534,14569

20th February 2003, 03:05 PM	#7
Jeff R diyAudio Member Join Date: Nov 2002 Location: Florida	I use a lot of 1N5822's. They are 3A, 40 volt devices which should be readily available. At 1 A the voltage drop is about .4 volts. I have never had any troubles with them. I think metal film resistors will be quite adequate. No need to go overboard with an op amp circuit.

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