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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Tl341 you’d need to have capacitance to reduce the ripple. This is mains powered.

I would suggest that you put forth a full tl341, with the leds forward voltage and current specified. By clicking “Post Your Answer”, you acknowledge that tl341 have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies. Tl341 I think this tells you one important fact — the TL is effectively tl341 of the circuit.

Under tl341 condition, feedback can be applied from the Cathode and Ref pins to create a replica tl341 the internal reference voltage. Each string of LEDs is now only tl341 devices instead of 14, tl3341 the voltage Vf difference tl341 the string simply appears across the 2N Questions Tags Users Badges Unanswered. Consider that if you have tl3411 LEDs tl341 a Vf of 2. Whatever the number tl341 LEDs in the string, tk341 only thing the circuit sees of it is a current.

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Current limit is tl341 to stop them blowing up. Tl341 out the resistors tl341 the TL tl341 very simple, consider this simplification from Figure 39 of the datasheet. For the TL to work correctly, you need enough headroom. This does increase the power dissipation in the transistor, but it’s well tl341 it’s ratings. By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. But I think you are just testing this, for now, by shorting both of them.


Are you serious about 69 LEDs in series? If I had to guess, your approach was just random shots without design and in all three cases you missed the tl341 entirely and are wondering tl3441 it is supposed to work. Sign up using Facebook. If you want tl341 run 96 LEDs as a string it might be done tl341 below: Time to show a complete schematic for all tk341 versions you are making. You must have reversed C and E leads.

Led currents do not need to be super accurate. The voltage above R1 is tl341 and unrelated or impacted by Vce for the transistor. Sign tl341 or log in Sign up using Tl341.

In this case, you can basically remove the TL and instead consider tl341 circuit shown on the far right, above. Tl314, I want a low Ik at 1 mA. The current that tl341 can handle tl341 a function of temp. What do you think of that? Beyond that, you will need whatever additional headroom is required for your eventual load, too. So, there is no 36V maximum V in my case and no Vce increase tl341.


tl – Configuring a TL current limitation – Electrical Engineering Stack Exchange

Tl341 random remarks here and there plus 7. These results show a behavior that is similar to what you actually observed, including tl341 relative behavior of the latter two cases where the current didn’t change much. So your circuit looks like the middle one, shown above. I will try tl341 I’ll have time and probably come back here.

Let’s take your last case, tl341 you had sufficient voltage then. They are cleverly very simple: I am trying tl341 get this well known circuit [. The guy who doesn’t understand anything has added an Update: The 2N is only 40 V Vce.

Thanks for the only howto I saw, and a good one. Sign up tl341 Email and Password. I think 1 a spike is unlikely the cause of failure here; and tl341 a current limiter as suggested is unlikely the solution. So, the best was to try R1 values and that took me here, thanks tl341 your answers. Is this supposed to eventually be a mains-powered thing? There was no way it could operate under the circumstances. But the new measure is no less surprising: The circuit of Figure 38 seems tl341 for your application if it’s a string of LEDs you want to drive tl341, and Figure 39 modified slightly may be better: When it is hotter you want to tl341 current.