G
Glenn
(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:
http://www.ti.com/lit/gpn/tl431
Unconditionally stable 0..100mA:
<7pF
or
3nF < CL < 25nF
or
-
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
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:
http://www.ti.com/lit/gpn/tl431
Unconditionally stable 0..100mA:
<7pF
or
3nF < CL < 25nF
or
http://www.diodes.com/datasheets/TL431_432.pdf0,2uF
-
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