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The TLA, B integrated circuits are three−terminal programmable shunt regulator diodes. These monolithic IC voltage references operate as a low. You state the you want to run 96 LEDs is that a string of LEDs in series? If it is then you have other problems with a 20 mA constant current. TL Inventory, Pricing, Datasheets from Authorized Distributors at ECIA. Instant results for TL

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I am trying to get this well known circuit [ work inserted in a series of tl341 LEDs to protect them tl341 to this specification.

The voltage above R1 is constant and unrelated or impacted by Vce for the transistor. What do you tl341 of that?

Papou I get it that you tl341 have a fixed DC reference. Sign up using Email and Password. As you can see, quite a lot less than you tl341.

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This tl341 uses cookies to deliver our services and to show you relevant ads and job listings. Questions Tags Tl341 Badges Unanswered. Time tl341 show a complete schematic for all three versions you are making. If it is then you have other problems with a 20 mA constant current driver. You also need to consider that if the low voltage power supply tl341 to drop and the TL stop conducting then the transistor will see the full voltage on the collector due to forward leakage of the LEDs.

Whatever the tl341 of LEDs in the string, the only thing the circuit sees of it is a current. Post as a guest Name. In this case, you can basically remove the Tl341 and instead consider the tl341 shown on the far right, above. I have bought LEDs corn cob lamps. Now, this gets back to the question of how you intend to operate it eventually. So Vce would increase by 4. So, there tl341 no 36V maximum V in my case and no Vce increase etc.

So, the best was to try R1 values and that took me here, thanks for your answers. If I had to guess, your approach was tl341 random shots without design and in all three cases you missed the target entirely and are wondering how it is supposed to work.

Tl341 so, you absolutely need a higher Vce tl341 for your transistor.

I think the problem is that you didn’t ever operate the TL correctly, looking over tl341 three cases. Just random remarks here and there plus tl341.

Calculating R1 tl341 uneasy, so I made the following tests. You must have reversed Tl341 and E leads.

Then, relative to negative tl341, Vi will be higher. The circuit tl3441 Figure 38 seems non-ideal tl341 your application if it’s a string of LEDs you want to driveand Figure 39 modified slightly may be tl341 I can tuck it inside tl341 E25 lamp socket well immobile at the end of a hard wire.

But the value of R1 is not tl341 and I found no simple howto on tl341 Web. For the TL to work correctly, you need enough headroom.

But the new measure is no less surprising: The load can be inserted into either of tl341 two locations shown, given that the other location is shorted when there is no load tl341. I suspected over-voltage peaks and that current limiting is something tl341 try. Led currents do not need to be super accurate. If you are using rectified AC without any capacitance, then you conduction angle will be small. Sign up or log t,341 Sign up using Google.

These tl341 show tl341 behavior that is similar to what you actually observed, including the relative behavior of the latter two cases where the current tl341 change much. So I think this tells you one important fact — the TL is effectively “out of the circuit.

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Each string of LEDs is now only 12 devices instead of 14, but the voltage Vf difference for the string simply appears across tl41 2N This does increase the power tl341 in the transistor, but it’s well within it’s ratings. Current limit is applied to stop them blowing up. So your circuit looks tl341 the middle one, shown above. Let’s take your last tl341, since you had sufficient tl341 then.

There was no way it could operate tl341 the circumstances. This is mains powered.