USB-PD-EPR PCB Design

Been working on a new 24V USB-PD Power Supply PCB. This design requests 28V at 5A and Outputs 24V at 3A. This is using the 140W USB-PD 3.1 Extended Power Range (EPR). Requires a 140W USB cable with an E-marker

The FDAI is an octagonal instrument with a rotating ball in the center. The ball is half black and half white, with numbers and lines on it to indicate angles. Three yellow needles direct the astronauts with the desired motion. Three arrow scales on the sides show the spacecraft's roll rate in the three axes. An orange flag labeled "OFF" is visible. The cover has been removed from the FDAI so some of the internal components are visible.

When landing on the Moon, the astronauts watched an instrument called the FDAI that showed the spacecraft's orientation. The ball inside the Flight Director/Attitude Indicator rotated in three axes as the Lunar Module rotated. Let's look inside and see how it works. 1/N

Jeez, I've fallen down a rabbit hole with this chip. The web application to program the eeprom is super cool! This might replace the CYPD3177 as my new favorite PD sink chip 😄

Lol, I shouldn't read a datasheet right when I wake up. I noticed the 10 GPIOs and didn't put 2 and 2 together. That's a sweet chip for sure! Nice job

That's a beefy little chip, lol. I glanced through the datasheet and it looks like you set the negotiation via i2c commands? So I guess you have a little microcontroller on the board too?

I just made a USB-PD board too! What chip did you use for the power negotiation?

Not if it's for something critical 😬

Proud of Bennet and Hickenlooper though. They grew a pair, finally.

It's just stock KiCad rendering. You could do it too!

Boards and stencil have arrived from JLCPCB, woohoo! Hotplate soldering when I get some free time

Made some little changes here and there. Design is now at JLCPCB for construction

The chip that handles the USB-PD negotiation is an Infineon CYPD3177. It's a super easy chip to work with (you can set voltage and current contracts with simple voltage dividers). It also provides a nifty 5V fallback power path if negotiation fails.

USB-PD circuit board deveopled in KiCad 9.0

Been putting together a new board over the last few days that takes in 60W of USB-PD goodness and outputs 24V. Using the brand new KiCad 9.0 from @kicad.org

Ooh, I've never seen an E4406!

Does Dan know you have his iron? 😄

That's a good question and I don't know the answer, unfortunately. I've only dabbled in antenna design and that was a long time ago.

What software rendered the PCB animation? Looks very slick!

I've always shied away from AliExpress because of the counterfeit chips there. Ever have any problems?

I order from LCSC a lot but you really have to buy in bulk because the shipping is high...

Where do you buy from? AliExpress? LCSC?

ENIG 😍

Two Keysight N9030B PXA Signal Analayzers

Spent yesterday unboxing and validating four Keysight N9030B signal analyzers

@arturo182.bsky.social has some great starter packs

A few years ago, I put 5V WS2812B LED strings around my house windows (inside) to stop climbing ladders in the cold to put up holiday lights. It uses the great WLED project. Here's the latest PCB I've been working on that implements some additional safety features: