Proper Connection and Powering of STEVAL-IPMM15B Setup

[Vishal_Dhakshinamurthy]

Dear Team,

I am currently working on a motor control project using the STEVAL-IPMM15B, NUCLEO-G474RE, and X-NUCLEO-IHM09M2 evaluation boards.

After referring to the user manuals, I connected the boards as per my understanding and powered the system with the following supplies:

• 375 VDC and 20 VDC to the STEVAL-IPMM15B

• 12 VDC to the VIN pin of the NUCLEO-G474RE

Upon powering the setup, I observed that the NUCLEO-G474RE was drawing approximately 0.9 A, and the onboard LDO temperature rose to around 95°C, as observed using a thermal camera. To prevent any potential damage, I immediately powered off the system and disconnected all the boards.

Subsequently, I tested the NUCLEO-G474RE independently using STM32CubeProgrammer, and the board programs and operates normally when used standalone.

At this stage, I would appreciate your guidance on:

1. The correct interconnection between STEVAL-IPMM15B, NUCLEO-G474RE, and X-NUCLEO-IHM09M2

2. The recommended power supply scheme, including appropriate voltage levels and power entry points

3. Any precautions or configuration steps required before powering the complete system

4. The initial firmware or example project recommended for safely bringing up the motor

Your support will be very helpful in ensuring a correct and safe setup for my application.

Thank you for your time and assistance. I look forward to your guidance.

Best regards,
Vishal

[GMA]

Hello @Vishal_Dhakshinamurthy,

Did you try using the 5V_STLK setup instead of the power supply input from VIN?

[Vishal_Dhakshinamurthy]

Hello @GMA,

I have tried powering the board using the 5V_STLK supply. Upon doing so, the LD4 LED, which indicates a high current draw condition, turns ON.

[GMA]

Hello @Vishal_Dhakshinamurthy,

Without STEVAL-IPMM15B connected, selecting 5V_STLK with JP5, and USB connected, is the LD4 LED on?
With a standard NUCLEO-G474RE functional board, LD3 should be turned on.

[Vishal_Dhakshinamurthy]

Hello @GMA 

Without STEVAL-IPMM15B connected, LD4 LED is turned off. And as you told LD3 is turned on.

[GMA]

Hello @Vishal_Dhakshinamurthy,

Then you have to inspect all connections for possible shorts or miswiring on STEVAL-IPMM15B and NUCLEO-IHM09M2.
Try using another power board if possible.

[Vishal_Dhakshinamurthy]

Hi @GMA 

As of now I checked powering and programming the board with 5V_VIN, 5V_STLK, 5V_CHRG without connecting the STEVAL-IPMM15B, Nucleo board works fine. So, is there any checking protocol for STEVAL-IPMM15B.

[GMA]

Hello @Vishal_Dhakshinamurthy,

Check whether connector #1 pins are correctly aligned for all boards
- NUCLEO-G474RE to X-NUCLEO-IHM09M2 via morpho connector.
- X-NUCLEO-IHM09M2 to STEVAL-IPMM15B connection via conductor flat cable.
Did you have made some HW changes?

[Vishal_Dhakshinamurthy]

Dear @GMA,

As per your instructions, I reviewed the board carefully using the datasheet and user manual to check for any hardware-related issues. During this review, I identified that one of the jumper plugs was mistakenly connected between 5V and GND on the Hall sensor pins. After removing this jumper, I was able to successfully program the controller board with the power board connected.

However, I am now facing a new issue. When attempting to run the motor using Motor Pilot or Profiler, the system reports a driver protection fault. To investigate further, I measured the fault indication pins and observed the following values:

• CIN: 0.007 V

• SD: 0.325 V

Kindly assist us in understanding the cause of this driver protection error and suggest the appropriate checks or corrective actions to resolve it.

Thank you very much for your continued support.