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Are you sure it is a MuRata and not a knockoff? H bridge loading problems. Apr 1, 5.
Lx datasheet & applicatoin notes – Datasheet Archive
In the same circuit, the voltage is 3. The manufacturer’s test is not a netlist test. While the schematic looks reasonable, your real problem may be in the layout. Sorry for my poor English,but can anyone give me some suggestions?
Apr 6, 9.
Search Forums Recent Posts. They worked well without anything wrong. But I can not dataxheet that violating them would cause the device to fail. What is the point of D7, D8, D9, D10?
I am wondering why Here are my thoughts: By JessicaleApril 24, in Power Electronics. Ideally, the correct part number should be showing up on the schematic. Could it be over-shooting beyond the DC-DC’s maximum voltage?
Up To 2.5A Step Down Switching Regulator
How good is your 12V? That means adding all the critical information on it. After that, you can post your question and our members will help you out. The 12V line is fairly stable, based datawheet a L which is only loaded with around mA a fraction of what it can handle. All the parts start with MPD and start with l597. That would be the first place I would look. First, the really dumb observation: They are definitely NMASC, but that wasn’t a dumb thing daatsheet say it wouldn’t be the first time I’d done something like that!
Saying all that, it is a fairly simple design and so far my manual inspection has found no reasons to be concerned. A few general comments: Still no luck on the DC-DC.
But if the DC-DC fails to start up, what happens to the downstream circuits? The Murata DCs do have a minimum current requiment, although the data sheet is a fatasheet convoluted and I was confused as to what it was.
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(PDF) L5973 Datasheet download
For all I know the problem is that you are using a 5V zener, but I have no way of knowing because all I see is “zener” p. I can change the distances hence, this ringing would have to be fixed by adding other components. You need to be a member in order to leave a comment. Testing out of circuit against a reference device shows they truly are dead.
How do you know that the PCB is manufactured correctly?
Register a new account. I tried to turn the R1 into 10K.
There are precautions about input voltage rise time at the bottom of Selection Guide on first page. With all these extraneous diodes, you may have a really poor layout which is causing a lot of stray inductance in the high current traces, inducing all sorts of problems. R26 is datawheet 2. My only other thought is that I’m over-loading the output of the Muratas which are only rated to 1W. Was it a “golden board” test or a real netlist based test?
VO has a minimum operating voltage of Does the power supply have a minimum current requirement? Similar Threads opto isolated h bridge PCB design. Create an account or sign in dataheet comment You need to be a member in order to leave a comment Create an account Sign up for a new account in datasheeh community.