Channel: DiodeGoneWild

Category: Science & Technology

Tags: switching1000w24vsmpstransformerteardownpower supply

Description: Today, the autopsy of the important components of the 24V 41.7A 1000W switching power supply from eBay. I opened the primary smoothing capacitors, which are apparently fake Nippon Chemi-Con, actually, used relabelled capacitors desoldered from e-waste (scrapped electronics). I also opened and reverse engineered the main power transformer and the GDT (gate drive transformer). I measured the winding inductances, checked the insulation safety, counted the numbers of turns and measured the wire diameters. I checked the capacitances and ESR (impedance) of all electrolytic capacitors. I also checked whether the transformers, the output inductor and the EMI inductor use copper or just copper coated aluminium (CCA). I also reverse engineered the gate drive circuitry of the power MOSFETs, quite a questionable design. The first episode - what's inside: youtu.be/mxl7ymOSvho The previous episode - test & measurements: youtu.be/NltsnPR--RI My DIY inductance meter: danyk.cz/lmetr_en.html Please support me on Patreon: patreon.com/DiodeGoneWild My Instagram: instagram.com/savage_danyk