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Current measurement with STM32L562QE-DK

c_dev05
Associate III

Hello,

I want to use the STM32L562QE-DK board to measure the current for my own developed PCBA. There is a connector CN20 that can be used for this purpose as written in the schematic for the board:

  • Output connector to supply and measure external target:
  • PIN 1: GND
  • PIN 2: Voltage source, current is not measured, it is not a copy of ourput voltage
  • PIN 3: Output with current measurement
  • PIN 4: Output voltage copy with 150R protection serial resistor, current is not measured

But there is no voltage on Pin 3? And in the user manual for the board I also did not find anything.

Where can I find documentation how to configure the board for this purpose?

Thanks,

Wolfgang

1 ACCEPTED SOLUTION

Accepted Solutions
c_dev05
Associate III

I found the solution by analyzing the schematic.

External current measurement:

  • connect USB cable to CN16
  • open JP2; onboard MCU not supplied
  • close JP7; supply CN20 external supply connector
  • connect external device to CN20; pins 1 (GND) und 3 (3.3V or 1.8V depending on jumper)
  • use STM32CubeMonitor-Power to measure current

Wolfgang

View solution in original post

1 REPLY 1
c_dev05
Associate III

I found the solution by analyzing the schematic.

External current measurement:

  • connect USB cable to CN16
  • open JP2; onboard MCU not supplied
  • close JP7; supply CN20 external supply connector
  • connect external device to CN20; pins 1 (GND) und 3 (3.3V or 1.8V depending on jumper)
  • use STM32CubeMonitor-Power to measure current

Wolfgang