TL431, LM431, KA431, TL1431 like stability

Apr 29, 2012 0 Replies

(Answers are sent to news://sci.electronics.components )



I have been a little curious about the temperature versus stability - so I compared two datasheets:


Unconditionally stable 0..100mA: Below 6nF - or more than 3uF:

formatting link


Unconditionally stable 0..100mA: 0,2uF

formatting link


-

What do I find?



(1) That the stability curves (possible capacitance loads) is different for different suppliers, and



(2) that the stability is only shown for Ta=25 deegree Celsius.


This means:



(1) It is harder to find an unconditionally stable capacitance load intervals for all suppliers (only 2 datasheets used in comparison).



(2) You do not know if it is stable - or how to make it stable - at e.g. Ta -40 deegree Celsius


How do you stably use and select __431?


-

How do capacitor ESR and ESL influence stability?



Glenn


Join the Discussion

Have something to add? Share your thoughts — no account required.

Didn't find your answer?

Ask the community — no account required