March 26, 2020


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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Find a different, more modern part with synchronous rectification, and while you’re at it, reevaluate whether you really need to use a 3V source. See Matt Young’s answer above. I’ve seen and looked into it. The source is actually a solar panel. When I tried testing it, it seems that it can handle more current than 3A and i’m just too scared to test it out as I might break the product.

Datashedt part from Pulse has the following specifications: You must have JavaScript enabled in your browser to utilize the functionality of this website. The next question is can the LM handle more than 3A?

Adjustable DC-DC Booster- LM2577

The LM integrated circuit from National Semiconductor is a useful IC that provides all of the power and control functions for a simple boost step-upflybackand forward converter switching regulator. There lm25777 a product in the world that will make that possible.

If so, I’d have no problems with it. Welcome to Elecrow Online Store. Because it is a boost lm25577 and you can’t break physics. Please, log in or register. That is pretty abysmal efficiency for a modern SMPS, but not outside of reasonable for the LM25xx era, and as much of a boost as you’re trying to get.


The IC has a wide input voltage range 3. The input capacitor C1 should be a good quality, low ESR, 0. Home Questions Tags Users Unanswered.

We would be able to supply 0. Granted, it’s a bit difficult to calculate exact switch current from a desired output current, but the point is, at a max switch current of 3A, it’s definitely not going to give you 13A switch current is always higher than output current. I’m trying to work around it.

Non-isolated buck Module Rectification: I only get 0. Put another way, you’re putting 9W into the regulator, and getting 6W of useful power out. The maximum switch current is exactly that: So what did the seller mean by Input Current: To see why, let’s take a look at the datasheet again.

LM Datasheet pdf – Series SIMPLE SWITCHER Step-Up Voltage Regulator – National Semiconductor

You may also like. The output switch can’t handle it. Please sign datasheft to the Market mailing list to receive updates on new arrivals, special offers and other discount information. Sign up using Facebook. I tried scanning through the datasheet and I fail to see its maximum input current.

If the IC is located far from the supply source filter capacitors, an additional larger electrolytic capacitor e. The output voltage is given by the following formula:. Henry Lachica 8 6. We will use solar panels so that would do it.


LM Datasheet(PDF) – National Semiconductor (TI)

If you’re trying to get 15V at 3A, this part is not going to do it. These solar cells need to go inside a solar charger controller that’s why we need to boost it to 12V. If you read the datasheet of the LM, it has an absolute maximum output switch current of 6. JavaScript seems to be disabled in your browser. Our price is lower than the manufacturer’s “minimum advertised price.

I’m actually looking into another product but I’m not sure if it’ll work again if the same inputs were used. But the current isn’t the same because I need about 2. What I actually need: This is your maximum input current.

Non-synchronous rectification Input voltage: The schematic is simple, easy to build and cost effective, producing 12V from a 5V unregulated supply with a maximum output current of mA. The problem is the current out would not be enough when datasheef use a boost converter. The version you linked to is dated You can simply remove the item from your cart.

I need to boost a 3V source to 15V and this is nicely done by the product. My Cart – 0 item.