I'm designing a BoosterPack to evaluate GaN devices with the help of a microcontroller.
The kit will have a GaN half-bridge that can control an output of 20V and 10A.
Currently the prototype can control switching frequency and duty cycle.
I'm also planning a stretch goal to integrate the design with LabView. You can then use this as a part of a test setup.
I have a working prototype. I modded an existing LMG5200 evaluation kit a while ago.
I removed the discrete PWM generator and replaced it with microcontroller managed signals.
This proof of concept works, both electronics and firmware. I can make a more sturdy version now.
Because of the high switching frequencies and high currents, that part of the design is critical.
I'm trying to place all components similar to the application notes. This will be my first 4-layer PCB design.
I have the schematic ready.
I had to create a few components and footprints (both for LMG5200 and rotary encoder, footprint only for the inductor).
For the PCB, I have a provisional layout. I haven't routed a single trace yet.
But I have uploaded that intermediate status to OSHPark to get an idea of how this device will look like.
Before doing that routing, I first have to verify if I can source all the components that I'm planning to use.
In particular the SMD 360° rotary encoder may be a tricky purchase.
To be continued...
|Hercules LaunchPad and GaN FETs - Part 1: Control Big Power with a Flimsy Mouse Scroll Wheel|
|Hercules LaunchPad and GaN FETs - Part 2: Make a BoosterPack|
|Hercules LaunchPad and GaN FETs - Part 3a: BoosterPack Layout - Reference Design|
|Hercules LaunchPad and GaN FETs - Part 3b: BoosterPack Layout - my version|
|Hercules LaunchPad and GaN FETs - Side Note A: BoosterPack Layout - Custom KiCad Parts|
|Hercules LaunchPad and GaN FETs - Side Note B: Look at the PCB|
|Rotary Encoders - Part 1: Electronics|
|Checking Out GaN Half-Bridge Power Stage: Texas Instruments LMG5200 - Part 1: Preview|
|Rotary Encoders - Part 4: Capturing Input on a Texas Instruments Hercules LaunchPad with eQEP|
|Vintage Turntable repair: Can I fix a Perpetuum Ebner from 1958 - part 4 - Hercules LaunchPad Enhanced PWM try-out|