Unidentified SMPS

sagor

Joined Mar 10, 2019
1,046
Is it a SMPS? Looks more like a linear supply. Check all the capacitor voltages, if they are all low (less than 100V), then most likely it is a multi-voltage linear supply, with perhaps some overcurrent and overvoltage protection on each voltage level supplied..
A SMPS would likely have some high voltage capacitors on a primary side, directly fed from diodes connected to the AC input voltage.
 

Ian0

Joined Aug 7, 2020
13,097
There's a sizable C-core transformer in there, and along with the capacitors would suggest a linear power supply.
There's also a RM pot-core, which suggests that the output of the linear supply might be stepped up or down to a different voltage with a switched mode.
 

Thread Starter

irobbie

Joined Apr 29, 2025
12
Is it a SMPS? Looks more like a linear supply. Check all the capacitor voltages, if they are all low (less than 100V), then most likely it is a multi-voltage linear supply, with perhaps some overcurrent and overvoltage protection on each voltage level supplied..
A SMPS would likely have some high voltage capacitors on a primary side, directly fed from diodes connected to the AC input voltage.
Yes I’ll check, it uses 3 tda 1060 control ice , also some d45c’s , also split supply-via 2 lots of 4diodes thank you oh and capacitors all under 100v
 

Pyrex

Joined Feb 16, 2022
501
The photos do not show large heatsinks, like those found in linear regulators.
The TDA1060 microchip is an SMPS controller. The ferrite choke with the yellow coil is probably visible in the photo above.
 

Thread Starter

irobbie

Joined Apr 29, 2025
12
The photos do not show large heatsinks, like those found in linear regulators.
The TDA1060 microchip is an SMPS controller. The ferrite choke with the yellow coil is probably visible in the photo above.
There are three small heatsinks each have a D45c and a byw29-150 thanks, also there are three of those chokes,,
 
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