Part of the reason is the compliance requirements. You need to pay quite a bit of money to USB-IF if you want to make anything USB and this is recurring as far as I know. There's also the other things like tests for EMC and ESD and whatnot. It either needs a big player to step up (you can use the same USB-IF membership for some tens of thousands of devices) or there should be a big enough market to support a smaller scale designer/manufacturer.
dheera|1 year ago