While at Mackie Designs I began developing switching power supplies in 2003.  I have done a large number of designs since then, with output power ranging between 20W to 1500W of output power.  I’ve used a number of topologies in the design of these supplies including:

•   Flyback
•   Forward
•   Unregulated LLC Q-Resonant
•   Regulated LLC Q-Resonant
•   PFC front end + Unregulated LLC Q-Resonant

Below are a few pictures of the various supplies that I have designed though the years.  These pictures represent just a small percentage of the many supplies I have designed.  Unfortunately many prototypes have been discarded.  Also I really didn’t take a lot of pictures of my various designs either, a pretty painful fact in hindsight.

Most Recently (late 2017) an audio power supply powered from an USB3 connection (+15V, -15V, +48V, +7V [for analog sections],+5V +3.3V [for digital sections]).  I developed this for one of my customers and it is currently in the Proto-2 phase of development:

I developed an isolated +12VDC input +/-15V output flyback design for one of my car audio customers back in 2016.  I show only the power section of this design to obscure my customer’s identity:

A recent Creation (2015), the TKO-1000W-PSU (Regulated Q-Resonant LLC Supply):

TKO-1000W-PSU

I Designed a super fast control loop around this TKO-1000W-PSU, and note it’s rock hard supply regulation with a 20Hz Sine Burst Stimulus:

REG-LLC

Compare this to a similar PFC + unregulated LLC power supply with the much slower recovery time and much reduced transient audio power output capability (Only 40% that of the TKO-1000W-PSU until the PFC power supply recovers approximately 250mS later):

REG-PFC

The Mackie MG-950W Power Supply (PFC + Unregulated Q-Resonant LLC @ 950W):

MG-950W-PSU

The Mackie DLM Power Supply (& Class-D amps in lower left hand corner), PFC + Unregulated Q-Resonant LLC @ 1400W (Top Side):

DLM PSU & Amp board top

The Mackie DLM Power Supply (& Class-D amps in lower right hand corner), PFC + Unregulated Q-Resonant LLC @ 1400W (Bottom Side):

DLM PSU + Amp Bottom

OK, so it wasn’t a switching PSU, but the supply on my Mackie M-4000 amplifier was still a barrel full of fun to do!  At full output power, it pulled close to 7000W from the AC power line!

mellinium family

The Original Mackie Onyx Mixer family supply:

onyx mixer

The Mackie Onyx-I Small Supply:

onyx-i-small supply

The Mackie Onyx-I Medium Supply:

onyx-i-medium supply-a

The Mackie Onyx-I Large Supply:

onyx-i-large supply-a