LM3578 DATASHEET PDF

LM Switching Regulator. The is a switching regulator which can easily be set up for such DC-to-DC voltage conversion circuits as the buck, boost, and. LM datasheet, LM circuit, LM data sheet: NSC – Switching Regulator,alldatasheet, datasheet, Datasheet search site for Electronic Components. LM Datasheet, LM PDF, LM Data sheet, LM manual, LM pdf, LM, datenblatt, Electronics LM, alldatasheet, free, datasheet.

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(PDF) LM3578 Datasheet download

The excessive sag in battery voltage suggests that the circuit is drawing far more current than it should during startup, while the slow rise in output voltage suggests that the current is too low for some reason. Will it work correctly without pin 2 connected? By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

Sign up or log in Sign up using Google. In both circuits sometimes, rarely it powers up immediately,which is quite perplexing.

LM3578 Datasheet

By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies. But if the inductor is saturating, it’ll never get there. The datasheet only guarantees operation from 2V, so if your batteries are sagging below that, you’ll either need some sort of soft-start circuit or some extra cells to stay above the minimum operating voltage.

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They have a similar example in the ds for 15V mA,where the inductor is uH. Note that this is already greater than the mA that the chip is specified to handle.

You’re overloading it, and this is going to cut into your overall efficiency, dropping as much as 0. After this the circuit works pretty fine.

As I mentioned the ebay item which I procured has similar behavior during startup. Post as a guest Name. Hello all, I have this circuit which will take an input 4×1. Laszlo 1 I am doing this on a proper pcb with a ground plane,initially i had used a DIP version on a stripboard,with slightly better results.

Datashet this l,3578 the battery voltage falls to about 1. EmbSysDev 1 1 There is a current limiting resistor,so that should prevent excessive draw,even during start up?

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The inductor in this configuration does not limit the output current. Email Required, but never shown.

With a minimum input voltage of 3. Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies. Home Questions Tags Users Unanswered.

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I would focus on the coil. Your 1 nF capacitor sets the oscillator frequency at about 80 kHz, which is a Slow start up of LM Ask Question. Any suggestions on how to improve this?

Your symptoms are actually a bit contradictory. Sign up using Facebook. The problem I am facing is that the voltage takes about 10s. Sign up using Email and Password. I procured a similar circuit from here.