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):
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:
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):
The Mackie MG-950W Power Supply (PFC + Unregulated Q-Resonant LLC @ 950W):
The Mackie DLM Power Supply (& Class-D amps in lower left hand corner), PFC + Unregulated Q-Resonant LLC @ 1400W (Top Side):
The Mackie DLM Power Supply (& Class-D amps in lower right hand corner), PFC + Unregulated Q-Resonant LLC @ 1400W (Bottom Side):
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!
The Original Mackie Onyx Mixer family supply:
The Mackie Onyx-I Small Supply:
The Mackie Onyx-I Medium Supply:
The Mackie Onyx-I Large Supply: