(To be verified) U2 hard drive enclosure

I am fixing the problem, and the current manuscript is a semi-finished product.

Update log:

2022.8.19 PCB and shell design completed, waiting to apply for sample verification

2022.8.30 The first version is available but it can only be used under USB2.0, so the differential pair needs to be re-arranged.

working principle:

Through RTL9210 bridging, devices with USB interface can use U.2 hard disks with NVME protocol through USB interface

The power supply part is directly connected to an external power supply that supports PD12V, and the 12v is tricked out through CH224K to power the hard drive.

Some hard drives also require 3.3v power supply in addition to 12v. Because the required current is small, AMS1117-3.3 is used to step down the voltage directly.

Features:

It supports PD to draw power. If you have a portable power bank, it can be used in emergencies when there is no external power supply.

(I originally wanted to add a lithium battery to it, but later I gave up considering that the U.2 hard drive is relatively hot when reading and writing and the PCB area is not enough)

Reading and writing can reach 1000MB/S (a PCIE3.0 disk of less than 1T is enough)

The back of the case has slots for attaching heat sinks

The volume is not very large (75*140*24)

Cheap (if you're willing to take the time to solder it yourself)

Precautions:

It is recommended to choose 1.0 for plate thickness

It is recommended to open the steel mesh for hand welding

The bridge connection should be a bit hot, so we can only test it in detail after we get the sample.

It is not recommended to use dismantled IC products (I bought one, but none of the five pieces worked)

Remember to update the firmware, SPI FLASH must be soldered (see attachment for firmware)