I made a bench power supply using a transformer from an uninterruptible power supply rectified to about 10.4 volts DC, then wired to a LTC3780 buck/boost converter board. The problem is I am getting nowhere near the current that it is capable of. LTC3780 is rated at max 10A and I have tested this transformer with a 6A load and it does not even get warm. I have tried increasing the capacitor from 3300uF to 13200uF with no change. I have tried some different loads with no change. I have two of this transformer, both react the same when wired to the ltc3780.
Here is a picture of the exact transformer. The primary coil is small black/white, secondary coil is white/red thicker wires on the bottom, red and black wires on top measure 120v.
This is similar to the one I use.
https://www.aliexpress.com/item/Fre...336.html?spm=a2g0s.9042311.0.0.27424c4d3W3hwq
kbj5010 is the rectifier
http://www.asemi.com.cn/upLoad/down/month_1407/201407261642596508.pdf
Here is a picture of the exact transformer. The primary coil is small black/white, secondary coil is white/red thicker wires on the bottom, red and black wires on top measure 120v.
This is similar to the one I use.
https://www.aliexpress.com/item/Fre...336.html?spm=a2g0s.9042311.0.0.27424c4d3W3hwq
kbj5010 is the rectifier
http://www.asemi.com.cn/upLoad/down/month_1407/201407261642596508.pdf