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.

Author: Mazumi Gurg
Country: Belarus
Language: English (Spanish)
Genre: Business
Published (Last): 14 June 2008
Pages: 391
PDF File Size: 19.82 Mb
ePub File Size: 19.55 Mb
ISBN: 699-4-65069-772-4
Downloads: 19025
Price: Free* [*Free Regsitration Required]
Uploader: Vudole

We will use solar panels so that would do it. Our price is lower than the manufacturer’s “minimum advertised price. The problem is the current out would not be enough when we use a boost converter. Datassheet Required, but never shown. This dayasheet uses the adjustable output version, it would facilitate your application and be your good assistant in your debugging.

The version you linked to is dated The LM is available in different packages: 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.

Adjustable DC-DC Booster- LM

If you’re trying to get 15V at 3A, this part is not going to do it. The IC has a wide input voltage range 3. There are may boost converters available.

Henry Lachica 8 6. So we’re actually having problems of boosting both the current and voltage simultaneously. I’ve seen and looked into it.

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: The output switch current has 6A listed as an absolute max, and 3A operating.


I tried scanning through the datasheet and I fail to see its maximum input current. I only get 0. The output switch can’t handle it. JavaScript seems to dtaasheet disabled in your browser. The source is actually a solar panel. TI released a revised version in April If you want 15V 2.

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.

Sign up using Facebook. To see why, let’s take a look at the datasheet again. The design uses the adjustable version of LM, but the 12V fixed-voltage version LMT will also datahseet if you remove R1 and R2 and connect lmm2577 feedback pin directly to the regulator’s output.

I have a hard time fully understanding dattasheet datasheet of LM Please, log in or register. By using our site, you om2577 that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Power is conserved, and you lose a bit or more than a bit of power to the regulator i. See Matt Young’s answer above. The other 3W is wasted as heat.

LMADJ Datasheet(PDF) – National Semiconductor (TI)

These solar cells need to go inside a solar charger controller that’s why we dwtasheet to boost it to 12V. The LM series of regulators are monolithic integrated circuits that provide all the active functions for a step-up buck switching regulator, capable of driving a 3A load withexcellent line and load regulation.


It’s a good habit to get into. Okay, that I understand. This is how a basic boost regulator works.

My Cart – 0 item. 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.

Adjustable DC-DC Booster- LM2577

But the current isn’t the same because I need about 2. The chip includes a 3A NPN switch transistor with its associated protection circuitry, consisting of current and thermal limiting, and undervoltage lockout. Sign up or log in Sign up lm277 Google.

The maximum switch current is exactly that: You must have JavaScript enabled in your browser to utilize the functionality of this website. Welcome to Elecrow Online Store. l2m577

Question on LM Ask Question. Because it is a boost converter and you can’t break physics. I can’t see any specifications on the lm577 that refers to the maximum input.

Even if the switch was up to it, the 3V source would have to supply over 20A. Please sign up to the Market mailing list to receive updates on new arrivals, special offers and other discount information Subscribe.