Capacitance Multiplier By Mr Evil / PMI Not Include Snubberized Power Supply (Download Gerber)

This PSU could, theoretically, supply up to 8A for short periods, with the output sagging to ±14V at that current, but it will never be asked to supply anywhere near that much in the intended application and I would rather not push it to the limit in case I break something.

It's a capacitance multiplier. These work by amplifying an RC filter, rather than a voltage reference as a normal regulator does. It has certain benefits over a regulator, including lower power dissipation and smoother output ripple (high frequencies are attenuated more than low frequencies). It's improved compared to the usual design that is seen (emitter-follower buffered RC filter) with increased ripple rejection and/or smaller RC filter capacitor due to high input impedance, and lower dropout voltage due to use of pass transistors of opposite polarity to normal (limited only by RDS(on) multiplied by output current for MOSFETs, or VCE(sat) for BJTs). The cost is increased complexity, with six transistors used per rail.

The mosfet contained in the layout is only an option, you can also use other series mosfet such as Mosfet IRF3205 & IRF4905 / IRF3710 & IRF52101 / IRF540 & IRF9540, Etc.

The design above does not include a psu snubber, so for connection to an amplifier like the chart below.

Official website : https://mrevil.asvachin.com/amp/amp4/sub/psu2/

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Download link (Google Drive):

Gerber

Comments

Simple Capacitance Multiplier Power Supply Filter By Rod Elliott (Gerber & PDF) Download on Google Drive

This is an easy design to build, but requires great care to ensure that ripple currents are not superimposed on the output because of bad grounding or power wiring practices. The schematic is drawn to show how the grounds of the various components should be interconnected, using a 'star' topology. If this is not followed, then excessive hum will be the result. Normally, a schematic diagram is intended to show the electrical connections, rather than the physical circuit layout. This diagram is an exception, and the physical layout should match the schematic (in as much as that is possible, at least). Surprisingly little resistance is needed across a high current connection to produce a measurable performance degradation. Using A Capacitance Multiplier Filter With Class-AB Amps Note that this circuit is quite suitable for Class-AB amplifiers, but since their current requirements vary so widely, adding a much larger capacitance to the output is a must. The dio...

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