Oct 25, 2006 #1 T tgq Full Member level 5 Joined Jul 15, 2002 Messages 289 Helped 7 Reputation 14 Reaction score 4 Trophy points 1,298 Activity points 2,360 digital psu I'd like tu build a simple digital PSU based on A/D converter driving Adj pin of LM317 Is it a good design ?
digital psu I'd like tu build a simple digital PSU based on A/D converter driving Adj pin of LM317 Is it a good design ?
Oct 25, 2006 #2 VVV Advanced Member level 5 Joined Nov 26, 2004 Messages 1,575 Helped 384 Reputation 768 Reaction score 88 Trophy points 1,328 Activity points 19,971 It will work, but only down to 1.25V. Also, you need to make sure the DAC can both source and sink current.
It will work, but only down to 1.25V. Also, you need to make sure the DAC can both source and sink current.
Oct 25, 2006 #3 R rauol Full Member level 6 Joined Oct 2, 2002 Messages 325 Helped 16 Reputation 32 Reaction score 4 Trophy points 1,298 Location India Activity points 2,647 you can use an opamp and vary the referance using DAC
Oct 25, 2006 #4 C CMOS Advanced Member level 3 Joined Jan 6, 2004 Messages 862 Helped 94 Reputation 186 Reaction score 50 Trophy points 1,308 Location USA Activity points 5,673 It would be better if you use switching regulator like LM2576 instead of linear one to improve circuit effeciency.
It would be better if you use switching regulator like LM2576 instead of linear one to improve circuit effeciency.
Oct 25, 2006 #5 Siniša Full Member level 6 Joined Jul 14, 2002 Messages 383 Helped 87 Reputation 174 Reaction score 18 Trophy points 1,298 Location Windsor ON Canada Activity points 2,692 What is desired output voltage range? E.g. 2-5V, 0-30V,... What is maximum current, precision needed? You need to answer some basic questions before starting design. Design you used can definetely be much better, with not many additional components.
What is desired output voltage range? E.g. 2-5V, 0-30V,... What is maximum current, precision needed? You need to answer some basic questions before starting design. Design you used can definetely be much better, with not many additional components.