Electronics > Repair
Xantrex/Sorensen XHR 40-25 schematic?
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ifonlyeverything:
I've recently come into possession of a non-working Xantrex/Sorensen XHR 40-25 power supply. Does anyone happen to have a schematic? I tried searching Google but I can only seem to find an operating manual which doesn't include a schematic. The XKW series service manual/schematic is available but just looking at the board reveals significant differences...

coromonadalix:
EDIT   see further away

so far  nothing from xantrex has ever leaked, or maybe some  as you suggest,   witch is rare ...

apparently  maybe  some lambda TDK  may have some similarities,  not sure for Sorensen

ifonlyeverything:
That's unfortunate, I'll look around for anything TDK that might be comparable.

For anyone who has never seen the inside of these.... very EFFICIENT use of space near the output.  :palm:

ifonlyeverything:
If anyone is familiar with these beasts, I'd appreciate some hints on how the main DC-DC topology works. :) I believe there's a PFC boost upstream. I can see the mains rectifier and then two FETs and two diodes in parallel on the PFC side. On the downstream DC-DC I see four FETs with bootstrapped gate drivers (IR2110), followed by the transformer, output inductor, and output capacitors. But I'm not seeing any rectifiers?


coromonadalix:
some power supplies use some kind of a buck boost / buck down configuration / pwm  configuration like / or ac phase control and have another section called the main regulator section

a mix of switching and linear modes ...  not sure if xantrex ones use something like this ??

on the bus bar you have a big black rectangle component,  could be an scr, triac  or bridge rectifier or even an big IGBT   witch would made sense  with the nearby ic's, and the thansformer who is in reality an huge inductor seems to confirm the operation


the linfinity  sg3524 is a classic  pwm ic
the uc3842 is a 500khz pwm ic too

IR2110/IR2113 are high voltage, high speed power MOSFET and IGBT drivers
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