masterleous Posted December 16, 2005 Report Share Posted December 16, 2005 Hi all,I want to make my Auto Range Power Supply like Input : 85 - 250 VACOutput : any DC Voltage like 12VDC 2-3ACan anyone have have an idea about this.?Thanks Quote Link to comment Share on other sites More sharing options...
audioguru Posted December 16, 2005 Report Share Posted December 16, 2005 Many electronic products have a switching power supply that works with AC input from 85V to 250V. Quote Link to comment Share on other sites More sharing options...
masterleous Posted December 17, 2005 Author Report Share Posted December 17, 2005 I know that many electronic devices have auto range power supply.But, i want to make my own Power supply, just like a project of 0-30V Variable Power Supply in This site.Can anyone know about it.Thanks Quote Link to comment Share on other sites More sharing options...
audioguru Posted December 17, 2005 Report Share Posted December 17, 2005 If you want to make the 0-30V power supply on this site to work with different AC input voltages then you will need to add a high-power switching AC-DC power supply to provide it with about 40V at 3A to replace the project's transformer and rectifier. Quote Link to comment Share on other sites More sharing options...
bloki Posted December 17, 2005 Report Share Posted December 17, 2005 You may use computer PS as it is or modify it. Quote Link to comment Share on other sites More sharing options...
indulis Posted December 17, 2005 Report Share Posted December 17, 2005 If I understand correctly, you want to make a "universal input" (85 - 250 VAC ) adjustable switch mode power supply (0 to 30VDC @ 3A)… correct?This can be done, but the control loop is very, very tricky because of the wide swing in duty cycle and potential variation of the load!!! Take a look at some of the apps notes on the TI (formerly Unitrode) web-site. Quote Link to comment Share on other sites More sharing options...
masterleous Posted December 27, 2005 Author Report Share Posted December 27, 2005 Thanks all for your replies,but i need some more help about switch mode power supplies. Quote Link to comment Share on other sites More sharing options...
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