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MCT8316A: MCT8316A

Part Number: MCT8316A

Tool/software:

Hi,

We just got the second layout of the board which having 3 MCT8316A IC's on board

The 1st board was for evaluation only, the 2nd round is the 1st operational layout candidate

There is minor circuit change regarding the MCT8316A schematic between the 1st to the 2nd board

Mainly:

1. Removing the external buck option peripherical components and change the FB_BK schematic accordantly

2. Removing  speed/ DIR wiring to the MCU (important to mention that fully success driving all 3 motors with I2C thru I2C MUX implemented in the 1st board)

3. The pin28 (Speed/WAKE) tied all 3 MCT8316A together to one MCU pin. 

4. DIR pin is floating (but we tied it to GND, don't help) 

5. DRVOFF pin is floating (but we tied it to GND, don't help) 

In the new board, no any I2C communication, we can't observe even ACK from the MCT8316

The motor try/ short start to rotate and stop and vise versa

The fault indication is active

The DACOUT2/SOX (pin 36) 3V output

can you please advise

BR  

Shachar