Part Number: LM, Maunfacturer: National Semiconductor, Part Family: LM, File type: PDF, Document: Datasheet – semiconductor. General Description. The LM LM are monolithic integrated circuits that in this data sheet are a family of standard inductors and flyback transformers. LM datasheet, LM pdf, LM data sheet, datasheet, data sheet, pdf, National Semiconductor, Series SIMPLE SWITCHER Step-Up Voltage.

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If you read the datasheet of the LM, it has an absolute maximum output switch current of 6.

Finally, let’s do a datashdet check with the data you provided. The output switch current has 6A listed as an absolute max, and 3A operating.

The other 3W is wasted as heat. Distributor Cooperated Designers Sponsorship. Home Questions Tags Users Unanswered. JavaScript seems to be disabled in your browser.

We will use solar panels so that would do it. Digikey might be a good place to start. Henry Lachica 8 6.

TI released a revised version in April You must have JavaScript enabled in your browser to utilize the functionality of this website. There is a very good chance that ” is a Chinese counterfeit so the chip specs may be different from the TI part, and the board specs are probably on the optimistic side.

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It’s a good habit to get into. Several things to look at here If you’re trying to get 15V at 3A, this part is not going to do it.

Adjustable DC-DC Booster- LM

But the inductor is one of the most critical components in these types of circuits, so it’s much safer and simpler to or use ready made off-the shelf parts: Please sign up to the Market mailing list to receive updates on new arrivals, special offers and other discount information. The UC – a pin to pin compatible replacement available from Texas Instruments om2577 also be used.

To see why, let’s take a look at the datasheet again. This is your maximum input current. I only get daatsheet.

Adjustable DC-DC Booster- LM2577

Question on LM Ask Question. These solar cells need to go inside a solar charger controller that’s why we need to boost it to 12V.

Non-isolated buck Module Rectification: HenryLachica The seller meant exactly what they said. I ratasheet a hard time fully understanding the datasheet of LM But the current isn’t the same because I need about 2. What I actually need: The supply of datasheft tested solar panel had a voltage of V and a current of 6A. Put another way, you’re putting 9W lm257 the regulator, and getting 6W of useful power out. 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 datssheet policies.


You have no obligation to purchase the product once you know the price. Even if the switch was up to it, the 3V source would have to supply over 20A. Granted, it’s a bit difficult to calculate exact switch current from a desired output current, but the point dtasheet, at a max switch current of 3A, it’s definitely not going to give you 13A switch current is always higher than output current.

You can design and make your own inductor using a suitable core recuperated from old equipment if you have the knowledge, practical experience and equipment for this task.

The LM is available in different packages: I’m trying to work around it. I’ve seen and looked lm257 it. Sign up or log in Sign up using Google. Please sign up to the Market mailing list to receive updates on new arrivals, special offers and other discount information Subscribe.

If the IC is located far from the supply source filter capacitors, an additional larger electrolytic capacitor e. The part from Pulse has the following specifications: The output switch can’t handle it.