DESCRIPTION. The LD is a step down monolithic power switch- ing regulator with a minimum switch current limit of. A so it is able to deliver more than. L datasheet, L circuit, L data sheet: STMICROELECTRONICS – A SWITCH STEP DOWN SWITCHING REGULATOR,alldatasheet, datasheet, . L Datasheet, L PDF, L Data sheet, L manual, L pdf, L, datenblatt, Electronics L, alldatasheet, free, datasheet, Datasheets.

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The modules seem appropriate for your application. Share this post Link to post Share on other sites. I suspect you have either mistyped the part number or put down a distributor’s part number. In the same circuit, the voltage is 3. Have you cut a PCB or are you doing this on a breadboard? Unfortunately, that is beyond the scope of what I can help you over the internet.

(PDF) L5973 Datasheet download

First, the really dumb observation: By Jessicale datasehet, April 24, in Power Electronics. But if the DC-DC fails to start up, what happens to the downstream circuits? Apr 1, 6.

Ask a Question Want to reply to this thread or ask your own question? I am wondering why I have not bothered to check the pin-out of all the parts. Good point about datasheeet Sorry for my poor English,but can anyone give me some suggestions? I used to use LD to produce voltage of 3. Apr 1, 5.

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Going on a slight tangent Hey 55, Thanks for the advice, some great points in there as usual. R26 is about 2. Apr 1, 3. However, I met some problems when I want to produce 5V voltage according to the circuit above. All the parts start with MPD and start with 5W. DC to DC converters. Does the power supply have a minimum current requirement?


Apr 1, 1. I would recommend you update the schematic to reflect the part numbers so someone looking at it can see what is going on.

L Datasheet(PDF) – STMicroelectronics

But I can not imagine that violating them would cause the device to fail. A few general comments: Saying all that, it is a fairly simple design and so far my manual inspection has found no reasons to be concerned. Have you stressed it and thoroughly tested it? Did you pay for “electrical test” datawheet the PCB?

Apr 5, 7. You have way too many unnecessary diodes in there. Have you considered the possibility that you were delivered wrong DC-DC converters and you are installing 5V input voltage devices into 12V?

Anything less than netlist based electrical testing of the PCB and you are gambling. Cascading dc to dc converter with H bridge. How do you know that the DC-DC failure is a primary failure and not a secondary failure? What is the point of D7, D8, D9, Datasheef Register a new account. That means adding all the critical information on it. My philosophy has always been to go overboard with the protection in the PCB dxtasheet then decide later whether I want to populate those parts.

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What is the input to output isolation? Test application circuit in the datasheet However, I met some problems l593 I want to produce 5V voltage according to the circuit above. I have gotten REALLY busy due to some issues coming up out of nowhere at work and have not had a chance to post here or eat or sleep or Power Electronics Search In.

H bridge loading problems.

There are precautions about input voltage rise time at the bottom of Selection Guide on first page. If not, all bets are off. How do you know that the PCB is manufactured correctly?

L5973 datasheet pdf

Ideally, the correct part number should be showing up on the schematic. I think early experiments have shown that there is ringing and it datzsheet well be causing problems.

They are definitely NMASC, but that wasn’t a dumb thing to say it wouldn’t be the first time I’d done something like that! I suppose I must be damaging the Murata’s though inadequate protection, although so far I haven’t been able to catch any suspicious spikes on the oscilloscope. Thanks again for your invaluable comments. Do they require some external capacitance? VO has a minimum operating voltage of