Talk:TL431

TL431 is the de facto industry standard

"The TL431 is the de facto industry standard error amplifier circuit for switched-mode power supplies with optoelectronic coupling of the input and output networks." That seems like a bold statement. Is it warranted? No citation, no time frame. Darsie42 (talk) 09:46, 18 August 2023 (UTC)

TL431#Switched-mode_power_supplies also made a very similarly-worded claim:

In the 21st century, the TL431, loaded with an optocoupler's light-emitting diode (LED), is the de facto industry standard solution for regulated switched-mode power supplies (SMPS).

But it actually has 3 citations to specific page numbers on three books to back it up. So while it is a bold statement, it does seem warranted. So I've made an edit (https://en.wikipedia.org/w/index.php?title=TL431&diff=1171030892&oldid=1147404323) that copied those citations to when this claim is being made in the intro too. Em3rgent0rdr (talk) 16:52, 18 August 2023 (UTC)

On-state V_CA

The article states

On-state V_CA drops to around 2 V, which is compatible with Transistor–transistor logic (TTL) and CMOS logic gates with 5 V power supply.

To my knowledge, standard TTL levels interpret 2 V as a high, not as a low. Therefore, IIRC, the given schematic does not work with standard TTL, as it changes from high level down to about 2 V when tripping. Both are interpreted as '1' by standard TTL.

Unfortunately, as I'm coming from another language Wikipedia, I'm unfamiliar with the Template:sfh sources/references. How do I dereference the given source/reference (currently #40)?

-- Pemu (talk) 16:33, 14 March 2024 (UTC)

I corrected the above the best way I could. The article as a whole is really rambling, with a lot of doubtful information. The above was the worst, which must not stand! Hard edit recommended! Wikipedia is not the place for amateurish hints and tips, but should contain information supported by the official data sheet!

Go-in (talk) 18:31, 16 February 2026 (UTC)