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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How do you know that the PCB is manufactured correctly?

L Datasheet(PDF) – STMicroelectronics

I have not bothered to check the pin-out of all the parts. I tried to turn the R1 into 10K. Ask a Question Want to reply to this thread or ask your own question?

I think early experiments have shown that datasheey is ringing and it may well be causing problems.

L5973 datasheet pdf

The quality of the layout is a different matter, hence the stray inductance may be an issue – not sure what to suggest other than to remove some of the protection diodes. That means adding all the critical vatasheet on it. ON Semi 20V Zener. I have no reason to suspect the IGBTs which seem rock-solid so far. Apr 1, 5. If you have any tips then let me know. That datqsheet be the first place I would look.


Similar Threads opto isolated h bridge PCB design.

My only other thought is that I’m over-loading the output of the Muratas which are only rated to 1W. What is the input to output isolation? I used to use LD to produce voltage of 3. Are you sure it is a MuRata and not a knockoff?

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You’ll need to choose a username for the site, which only take l59973 couple of moments here. Thanks again for your invaluable comments. The input is 24V DC. Cascading dc to dc converter with H bridge. How do you know that your layout is correct? Apr 1, 1. You have way too many unnecessary diodes in there.

While the schematic looks reasonable, your real problem may be in the layout. Register a new account. Apr 1, 6. Ideally, the correct part number should be showing up on the schematic.

L datasheet, L datasheets, manuals for L electornic semiconductor part

The 12V input actually 12V? Does the power supply have a minimum current requirement?

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Sure, I know the schematic is crap – I drew it in a dataaheet with really old and crappy design software. I can change the distances hence, this ringing would have to be fixed by adding other components. I suspect you have either mistyped the part number or put down a distributor’s part number. Already have an account? Is R26 and its siblings placed datxsheet to the driver where it would reduce ringing or is it placed next to the IGBT where it would promote it? How good is the layout? I have attached a pictures that shows the general idea of the schematic, as well as a detailed schematic with every component.

Are the DC-DC converters isolated?