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.

Author: Zulkihn Talabar
Country: Gambia
Language: English (Spanish)
Genre: Sex
Published (Last): 9 May 2007
Pages: 263
PDF File Size: 19.93 Mb
ePub File Size: 20.23 Mb
ISBN: 641-1-22747-691-8
Downloads: 65767
Price: Free* [*Free Regsitration Required]
Uploader: Gardashura

I am wondering why Discussion in ‘General Electronics Discussion’ started by stube40, Apr 1, Create an account or sign in to comment You need to be a member in order to leave a comment Create an account Sign up for a new account in our community.

Unfortunately, that is beyond the scope of what I can help you over the internet. Apr 5, 7. How do you know that your layout is correct? I suspect you have either mistyped the part number or put down a distributor’s datxsheet number. Apr 1, 4. Feel free to suggest some to leave out if you think they are redundant. Have you stressed it and thoroughly tested it? Apr 1, 5. For all I know the problem is that you are datasheft a 5V zener, but I have no way of knowing because all I see is “zener” p.

Test application circuit in the datasheet However, I met some problems when I want to produce 5V voltage according to the circuit above. R26 is about 2. After that, you can post your question and our members will help you out. Here are some details of LD: Did datawheet pay for “electrical test” of the PCB?


They are definitely NMASC, but that datazheet a dumb thing to say it wouldn’t be the first time I’d done something like that! But if the DC-DC fails to start up, what happens to the downstream circuits? I used to use LD to produce voltage of 3.

L datasheet, Pinout ,application circuits Up To A Step Down Switching Regulator

I have no reason to suspect the IGBTs which seem rock-solid so far. How do you know that the circuit is exactly what you have drawn here?

The datasheft are same while the feedback resistance are different. Sure, I know the schematic is crap – I drew it in a hurry with really old and crappy design software. 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.

I have gotten REALLY busy due to some issues coming up out of nowhere datashedt work and have not had a chance to post here or eat or sleep or Was it a “golden board” test or a real netlist based test? You must log in or sign up to reply here.

H-bridge over dattasheet dc engine. The modules seem appropriate for your application.


A few general comments: Hey 55, Thanks for the advice, some great points in there as usual. Since you are driving this with another DC-DC, you are may be violating them.

ON Semi 20V Zener. Datasheeh you considered the possibility that you were delivered wrong DC-DC converters and you are installing 5V input voltage devices into 12V? Is R26 and its siblings placed next to the driver where it would reduce ringing or is it placed next to the IGBT where it would promote it? H bridge loading problems. In the same circuit, the voltage is 3. datashewt


smd l datasheet & applicatoin notes – Datasheet Archive

While the schematic looks reasonable, your real problem may be in the layout. There are precautions about input voltage rise time at the bottom of Selection Guide on first page. Are the DC-DC converters isolated? Saying all that, it is a fairly simple design and so far my dataxheet inspection has found no reasons to be concerned.

I can change the distances hence, this ringing would have to be fixed by adding other components. You have way too many dahasheet diodes in there. I’m in the process of migrating to Datashheet, but the project timescales didn’t fit in with the associate learning the curve – will rectify all the problems for the next project That would be the first place I would look. Hence I was unable to find the datasheet.

The 12V line is fairly l59733, based on a L which is only loaded with around mA a fraction of what it can handle. How good is your 12V? Already have an account? I have attached a pictures that shows the general idea of the schematic, as well as a detailed schematic with every component.

Here are my thoughts: However, I met some problems when I want to produce 5V voltage according to the circuit above.