vnh5019 output voltage Issue

[CapnKernel]

I bought 3 and all 3 were defective in all different ways..  So I basically stopped using this part.   Maybe it will work if you reduce pwm frequency but it will then make audible noise.

Did you try VNH2SP30 modules, or  VNH5019?

I bought 3 VNH2SP30, two from China sellers, and one from a reputable hobbyist place here in Australia.  All three were faulty - they either didn't work, or only worked in one direction.  (The Australian sourced one looked exactly the same as the China ones, so I think they were just reselling).

I have bought 16 VNH5019 modules (single channel version) in three orders from this company:

 https://www.aliexpress.com/item/4000046778315.html

I've tested eight VNH5019 (some from all three orders) and all have worked fine.

I suspect most of the VNH2SP30 from China are faulty.  Three scenarios:

1. They are "pulls".  They may have been recycled from old cars, as these were intended as power window drivers.  
   
   
2. They failed ST's QC, and were sold off as working in only one direction, but these have been returned to the market by unscrupulous sellers as grade A.
   
   
3. They were part of an unofficial run at the plant ST had their chips made at, and these were sold out the back door.
   

I lived in Shenzhen for three years, and I saw a lot of dodgy things like this.  Her's a good discussion:

  https://www.bunniestudios.com/blog/?page_id=1022

Mention of VNH2SP30 in the PyPilot code stands as a tacit approval of this device, but anyone who tries the VNH2SP30 is almost certainly on the road to failure.  This doesn't seem a good idea.

What if we replaced VNH2SP30 in the code with VNH5019?