Casing of 2-rail 5V LPSU Back view of 5V LPSU 5V LPSU Inside View Independent LPSU boards 5V LPSU placed above streamer The encapsulated transformer is from Nuvotem Talema 80VA with dual 9VAC outputs. I build my own 2-rail 5V LPSU so that each side of the board is powered independently. Add terminal block for separate 5V inputs on input and output sides.Disable 5V LDO (input voltage from DC-DC isolated converter) on the output side.Use external LDO to generate 3V3 on the input side.The default configuration also uses internal LDO to generate 3V3 from VBUS1 (input side) which is suboptimal. Ideally the 5V from motherboard should not be used, but the default EVM configuration uses 5V from motherboard’s USB and isolated DC-DC converter to generate 5V to the DAC side. I prefer the sound when using TI’s ISOUSB211EVM compared to Core Audio USB P24 OCXO and JCAT USB XE cards. My first hand experience with the default settings – I was surprised by the improvement in layering, decays and details without being too digital. I bought two of these (only 1 unit allowed per order) since modifications need to be made. ALLDAQ (Germany) and Virtins Technology (Singapore) are both PC-based measurement and instrumentation companies making products like oscilloscope. As mentioned earlier, Intona (Germany) makes USB2/3 Isolators for industrial use. Three of the companies listed above make industrial products. Virtins Technology VT USB-ISO-480 USB High Speed Isolator (>800 mA, comes as USB dongle).ALLDAQ ADQ-USB 3.0-ISO-PS / 3.0 Isolator incl.
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