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TUNS500F power module...Abs Max voltage to TRM pin = ?

Flyback

Well-Known Member
Hi,
(Sorry to ask again about this power module, but i thought info could be useful to others too)
We want to use the TUNS500F ACDC power module for 48V, 7A5 PSU.
Does anyone know the absolute maximum voltage that can be applied to the "TRM" pin?
The Applications manual, on page "TUNS-26" talks about it, but doesnt give the value.
There's a family of modules, and the literature is a little unclear as to what page applies to which particular module.

datasheet
https://en.cosel.co.jp/tool/tag/pdf/SFE_TU.pdf

Instruction manual
https://en.cosel.co.jp/tool/tag/pdf/CME_TU.pdf

Applications manual
https://en.cosel.co.jp/tool/tag/pdf/TU300_500_700_manual.pdf
 

alec_t

Well-Known Member
Most Helpful Member
The module has a 2.5V internal reference. Based on Figs 4.2 and 4.3 of the Apps Manual, for a minimum 38V regulated output voltage any voltage above 4.2 on the TRM pin will cause the internal comparator input node to go above 2.5V. How far above it can go without causing a problem/overload is anybody's guess.
 
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