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i want to design dual power supply with high current rating ,i am not familiar with lm2576.
can anybody tell me how to use lm2576 negative (-5 volt) generation. please reply me i am waiting .
I have moved this to the Simple Switcher Forum where it will get the proper attention.
In reply to LeonardEllis:
Please see the LM2576 data sheet; figure 24. I have also attached some app notes that may be helpful.
In reply to Frank De Stasi:
actually sir i want to design power supply which can give up to 5 amp of current. i want it for load cell (+/- 5 volt )
i design it , lm2576 for + 5 volt and lm7905 for -5volt. but the thing is that , when i connect load cell to power supply load cell gives output 80mv without any input
sir pleas tell me there any problem because of lm7905 otherwise tell me suggestion.
In reply to yogesh nandurkar:
It would be helpful if you could draw a block diagram or schematic for what you need to do.
If you need -5V at 5A you will need a higher current device.
i have used center tap transformer of 12 volt 5 amp
This schematic looks OK to me. I assume you have large Al. capacitors on the output of the bridge??
What is the issue you are seeing with this circuit??
I am not sure I can answer your question about your sensor. If it is a TI device you may try to find the correct forum.
If there is an offset, maybe you need +/- supplies that are tracking and balanced.
if you have any idea to design +/- 5volt with high current rating up to 5amp , then suggest me .
Hi Yogesh, You mean your load need +/-5V powersupply and the max load will be as large as 5A, right? If so, I'm afraid you need a 60V/5A device for the +5V output. TPS54560 may be more suitable. Or LMR14050 is also a recommendation if 40V voltage is enough for your system.
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