13 PDF Article

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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See Matt Young’s answer above. So what did the seller mean by Input Current: There are may boost converters available. The output voltage datawheet given by the following formula:.

We would be able to supply 0. To see why, let’s take a look at the datasheet again. 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. You can design and make your datasbeet inductor using a suitable core recuperated from old equipment if you have the knowledge, practical experience and equipment for this task.

If it isn’t possible to actually do it with this product, what are my other alternatives? By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. What you’re wanting is physically not possible. I need to boost a 3V source to 15V and this is nicely done by the product. Sign up using Facebook. The chip includes a 3A NPN switch transistor with its associated protection circuitry, consisting of current and thermal limiting, and undervoltage lockout.


Okay, that I understand. Several things to look at here 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. Post as a guest Name. But the current isn’t the same because I need about 2. The version you linked to is dated 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 datazheet.

Welcome to Elecrow Online Store. Digikey might be a good place to start. 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. I can’t see daasheet specifications on the datasheet that refers to the maximum input. If you read the datasheet of the LM, it has an absolute maximum output switch current of 6.

The IC has a wide input voltage range 3. With the solar panel, it’s actually possible to have that kind of supply. This is how a basic boost regulator works. Email Required, but never shown. JavaScript seems to be disabled in your browser.

Adjustable DC-DC Booster- LM2577

The maximum switch current is exactly that: What I actually need: You have no obligation to purchase the product once you know the price.

HenryLachica The seller lm5277 exactly what they said.

The supply of our tested solar panel had a voltage of V and a current of 6A. You may also like. The LM is available in different packages: I only get 0.


If the IC is located far from the supply source filter capacitors, an additional larger electrolytic capacitor e. These solar cells need to go inside a solar charger controller that’s datasheft we need to boost it to 12V. This module uses the adjustable output version, it would facilitate your application and be your good assistant in your debugging.

Adjustable DC-DC Booster- LM

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Even if the switch was up to it, the 3V source would have to supply over 20A. If so, I’d have no problems with it. The input capacitor C1 should be a good quality, low ESR, 0.

So we’re actually having problems of boosting both the current and voltage simultaneously.

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

First, always get your datasheet straight from the manufacturer. I bought this product that has a LM in it and the specifications indicated by the seller that it can have a maximum output current of 2A with a maximum input current of 3A.

Sign up using Email and Password. The UC – a pin to pin compatible replacement available from Texas Instruments datashfet also be used. My Cart – 0 item. The switch switches the input current to ground through lm25577 inductor and sense resistor.