Excellently explained the useful function of the TL431, and calculations involved with clear samples. Thank you very much!!! I have subscribed, and liked.
Hi sir Nice to explain but I have one question regarding R1 in previous vdo u had sujjest VBE (0.7÷0.05) ,,how u select resistor value In ckt which value of v & i ,we have to consider when selecting the resistor.
Thanks.how can two transistor behave current limiting and voltage control.bd139 &2n 3055 .2ndly can we give ur circuit feedback to base of powerful transistor as higher current limiting? Hope for more details thanks again
videos are very rich and full of content and good references as well. only hard to follow up with the narrator and possibly if you use any of those AI speak programs will make it a more versatile and huge viewer as well. hope no offense was taken and no doubt the channel admin is a very knowledgable person.
Hi, i have a question, Does all three constant current regulator you upload here will reduce voltage receieved by load to achieve desired current? I want to keep the voltage same as input even when the load has less resistance and the current increases. Thank you
Your comment is true. R1= 8 / { ( IL / hfe)+İka} R1=8 / 0.002 = 4000R .If the current flowing through the Tl431 is 1 mA, this value will be 4000 ohms. But I think the friend meant 100 mA in the formula.
Excellently explained the useful function of the TL431, and calculations involved with clear samples. Thank you very much!!! I have subscribed, and liked.
How you calcule R1=728 Ohms ?????? Because 8/((.05/50)+.001)= 8Volts/ 2mA= 4000 Ohms
2.5v Supercap ko charging ke liye es circuit ka use kar shakte h kya ?
Very informative video
Glad you think so!
Better to use opamp as feedback element for good current regulation and Low voltage drop.
Why do u you choose 2n3019? Is there an alternative?
you can take any BJT, that can handle the desired current, for example a S8050
Hi sir
Nice to explain but I have one question regarding R1 in previous vdo u had sujjest VBE (0.7÷0.05) ,,how u select resistor value
In ckt which value of v & i ,we have to consider when selecting the resistor.
are we have TL431 analogs with low Vfb? I mean approximately Vfb 0.5 V...
Thanks.how can two transistor behave current limiting and voltage control.bd139 &2n 3055 .2ndly can we give ur circuit feedback to base of powerful transistor as higher current limiting? Hope for more details thanks again
No. Yes
can it be used to drive 2A?
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My friend simulation betiful.thanks👍👍
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videos are very rich and full of content and good references as well. only hard to follow up with the narrator and possibly if you use any of those AI speak programs will make it a more versatile and huge viewer as well. hope no offense was taken and no doubt the channel admin is a very knowledgable person.
Thank you!
Hi, i have a question, Does all three constant current regulator you upload here will reduce voltage receieved by load to achieve desired current? I want to keep the voltage same as input even when the load has less resistance and the current increases. Thank you
you need constant voltage regulator for that
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there are some gain parameters for tl431 right. how you calculated
We don't need to calculate any gain parameters here, the TL431 is working as a comparator.
gud explanation keep it up sir 👍
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Поздравляем, ты смог прочитать документацию на TL431.
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Thank you so much, Glad you liked it!!
Can it be used for 150 ma current
yes, it can. for R2 you take 3 resistors 47 Ohms in parallel, for Q1 a BD135 or BD137
Can it be designed to drive 100 ma load
yes, it can. for R2 you take 2 resistors 47 Ohms in parallel, for Q1 a S8050
please please what happens if you replace the bjt with mosfet
you can use mosfet as well!
IS R1 IS4 KOHM?
If the current flowing through the Tl431 is 1 mA, this value will be 4000 ohms. But I think the friend meant 100 mA in the formula.
@@elektronikhobim6903 nope, the friend calculated with 10 mA :-)
R1 should be 4k ohm according your calculation sir
May Allah bless you
Thank you!
What is a current limiter?
the resistor which restricts the current flow
R1 should be 4k according to your calculation sir.
Your comment is true. R1= 8 / { ( IL / hfe)+İka} R1=8 / 0.002 = 4000R .If the current flowing through the Tl431 is 1 mA, this value will be 4000 ohms. But I think the friend meant 100 mA in the formula.
@@elektronikhobim6903 nope, the friend calculated with 10 mA --> 8 V / 0,011 mA = ~727 Ohm :-)
What else to tl431
It is a programmable shunt regulator (zener diode)