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LP5012: 4 driver in same I2C line problem

Nicola Sansotta
Prodigy 60 points
Part Number: LP5012

Tool/software:

Hello,

We are currently using your LP5012 driver on our devices which so far have always worked well.
However, we found ourselves in the situation of having to use 4 LP5012 drivers on the same I2C communication line.

  • Driver 1: ADDR0 = GND & ADDR1 = GND
  • Driver 2 : ADDR0 = GND & ADDR1 = VCC
  • Driver 3 : ADDR0 = VCC & ADDR1 = GND
  • Driver 4 : ADDR0 = VCC & ADDR1 = VCC

We manage to use drivers 1 to 3 correctly, but we can't get driver 4 to work:

We have the same problem on all our PCBs.

We modified the address of the 4th driver with one of the first 3 and it works correctly.

We have modified the address of one of the first 3 drivers with that of the 4th and the driver stops working.

We have tested our software with the LP5012EVM evaluation board with the address of Driver 4 and it responds correctly to our commands.

  1. Have you ever encountered a problem with the Driver 4 address?
  2. Can using 4 drivers on the same I2C line cause a malfunction?

Thank you in advance for your feedback.