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Saham.kh
Joined: 10 Aug 2007
Posts: 44
Helped: 26
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 04 Sep 2007 14:34 lm2575hv 5v solution |
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hi...
im looking for a circuit to role as a safe power supply for my board.
my board run on 5v DC and im looking or a circuit to prepare 5vDC output in the input range of 10-60 v DC and 12-30 v AC or something like that...
my board suppose to work on an industrial environment... so any idea results in safety operation will help me ... thank u
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IanP
Joined: 05 Oct 2004
Posts: 6490
Helped: 1542
Location: West Coast
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04 Sep 2007 15:25 Re: Power supply circuit |
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The LM2575HV is a good candidate for this job ..
It accepts any input voltage between 8Vdc(5V version) to 60Vdc, or with rectifier diode/bridge on input up to 42Vac, which is more than you need ..
Here are its details:
http://www.national.com/mpf/LM/LM2575HV.html
Regards,
IanP
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angelote
Joined: 28 Apr 2005
Posts: 106
Helped: 11
Location: Spain
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05 Sep 2007 7:25 Re: Power supply circuit |
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You can use a DC-DC converter with electrical isolation.
Some popular manufacturers are, C&D Technologies, Astec, Lambda and Traco Power.
If your source is AC, rectify it.
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Handsome Hero
Joined: 04 Aug 2004
Posts: 5
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11 Sep 2007 7:35 Re: Power supply circuit |
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| You can using MC3406, it's good for DC-DC, very simple,
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siongboon
Joined: 24 Jan 2006
Posts: 288
Helped: 25
Location: Singapore
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22 Sep 2007 16:07 Re: Power supply circuit |
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You can try the following dc-dc IC.
lm2576, lm2575
http://www.siongboon.com/projects/2005-08-07_lm2576_dc-dc_converter/
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22 Sep 2007 16:07 Ads |
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plusminus
Joined: 27 Jul 2007
Posts: 98
Helped: 12
Location: the Netherlands
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22 Sep 2007 20:04 Re: Power supply circuit |
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LM2575HVT is indeed a good solution for industrial applications. I use them already for over 10 years in professional event lighting equipment ( Rock&Roll) and they never give a problem.
One tip. Be sure the freewheel diode is soldered properly on a PCB. When 'open' at one side your electronics and the chip will give smoke. (prototype experience....)
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