I have a question regarding the building a switching regulator article that discusses using the National Semiconductor LM2576. My application will be regulating voltage down from 48 volts to 12. Using the datasheet this calls for a 330uh inductor and the datasheet also gives some suppliers and model numbers.
I see that these inductors are rated at 3 amps as is the LM2576. I'm only looking to draw less than 500 mA. Can I use a lower rated inductor?
Thanks
Build a Switching Regulator
Re: Build a Switching Regulator
Take care doing this mod. The current in the inductor istmort wrote:I see that these inductors are rated at 3 amps as is the LM2576. I'm only looking to draw less than 500 mA. Can I use a lower rated inductor?
proportional to the load current, but not the same.
In a flyback converter the energy transferred on each cycle
is first stored in the inductor (actually in the gap in the core).
There is also DC current flowing in the inductor, which
will cause saturation unless the inductor is design ed for
that service. Skimping on the inductor is the usual downfall
of SMPS designs.
Are you following the manufacturer's design guide? You
didn't cite what 'article' you are referring too.
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Re: Build a Switching Regulator
Hi Bigglez, I belive tmort is talking about the NV article: Build a Switching Regulator
http://www.nutsvolts.com/index.php?/mag ... _regulator
http://www.nutsvolts.com/index.php?/mag ... _regulator
Intelligence is the ability to adapt to change. Stephen William Hawking.
Re: Build a Switching Regulator
Got it! Should be all the OP needs to read and then build their project.Michael Kaudze wrote:Hi Bigglez, I belive tmort is talking about the NV article: Build a Switching Regulator
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Re: Build a Switching Regulator
Hi All,
Can this be used to charge a 12V battery from a 48V DC source?
Thanx
Can this be used to charge a 12V battery from a 48V DC source?
Thanx
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