Check for Samples: LM, LMN, LMA. In addition to higher −40°C ≤ TJ ≤ +°C, and the LM is rated for 0°C handled. ≤ TJ ≤ +°C. The LM is an adjustable 3-terminal positive voltage . FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE. I have a current regulated supply (fed by a 24V power supply) that used to have a Fairchild LM in it. This supply has a set of switches that let.

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Datasheet «LM350»

Results 1 to 22 of Perhaps a large cap from ADJ pin to ground would help. Fairchild LM dies, takes other parts with it Doug, Could oscillations lead to the part failing? The short version faicrhild to fix it, I used a 39V Zener around the ln350 limit the differential and ramped the input voltage so the caps had a chance to charge. Normally, this causes 0. Fairchild LM dies, takes other parts with it Doug, Thanks for the suggestion.

The input cap we all ingnore turned out to be critical. There are 43 items available. The and it’s ilk are floating regulators that are not supposed to care about the actual voltage as long as a differential from input to output is less than 40V.

Faorchild More – opens in a new window or tab International postage and import charges paid to Pitney Bowes Inc.

Find out more about your rights faichild a buyer – opens in a new window or tab and exceptions – fairvhild in a new window or tab. Fairchild LM dies, takes other parts with it The big resistors on the left look like metal oxide to me. The seller hasn’t specified a postage method to United States.


Learn More – opens in a new window or tab. This I’ve seen a fair bit on LMs in a product I supported many years ago.

I also smelled a slight burning electronics smell but couldn’t pinpoint it. Make offer – Loading Description Postage and payments.


Add to basket. Buy it now – Add to Watch list Added to your Watch list. Maybe there was a turn on transient or as someone mentioned, oscillations. No additional import charges on delivery. Fairchild LM dies, takes other parts with it I have a PS LMs instead of the and I have found them to be fairly bullet proof with respect to thermal overload. For additional information, see the Global Shipping Programme terms and conditions – opens in a new window or tab This amount includes applicable customs duties, taxes, brokerage and other fees.

Normally, we leave positive feedback for you once payment received. Thread Tools Show Printable Version. The downstream circuitry has storage caps that are still sitting at zero volts.

Fairchild LM dies, takes other parts with it Aside from the possibility of an open in the switch maybe as changing positions? I faircbild doing some testing when one of my test Luxeon IIIs lit up for a second, then went out.

Okay, my mistake on the red resistors. Fairchild LM dies, takes other parts with it Hi again, Hey ya know, now that i think about it Email to friends Share on Facebook – opens in a new window or tab Share on Twitter – opens in a new window or tab Share on Pinterest – opens in a new window or tab.


When the power supply is started, the input to the faicrhild to 70 volts or so. Read more about the condition.

All of my testing with Luxeons has happened with this supply, and I’ve never had a problem until now. How does this fit with the topic? With the unit sitting at rest, all voltages are zero.

Take a look at our Returning an faifchild help page for more details. That’s the one that took 48W for a few seconds – it was glowing and smoking! Doesn’t post to United States See details.

LM Datasheet(PDF) – Fairchild Semiconductor

I haven’t blown one yet, so they must be. Seller assumes all responsibility for this listing. If the pot wiper contact is dirty it could cause it to open intermittently when it’s being adjusted. Do you plan a mass burial? Those are metal film resistors. See other items More Not a complete recovery, so this luxeon will be used for testing.

Build anything, call it an amplifier and it will oscillate.

Hi evan, Sorry to hear lm3500 that. I started to test the supply its self by hooking it directly to a low value current sense resistor 0.

Report item – opens in a new window or tab. Get the item you ordered or your money back. Reason is because transit time is highly depended and provided by Postal Service except weekends and holidays. The item you’ve selected wasn’t added to your basket.