Dual MP5031 with MP4255 Communication Issue

DC-DC Power Converters
1

We have implemented a dual port charging circuit following the typical application on the MP5031 datasheet (figure 24).

We tried with P/Ns MP5031GRE-00A3-Z and MP4255GVE-0000. We put a scope on the I2C bus between the chips and noticed the MP5031GRE-00A3-Z was reaching out to MP4255GVE-0000 on slave address 0x67 and getting no response.

What are the correct part configurations for MP5031 and MP4255 when implementing this design.

2

Hi,

I believe the default address of the MP4255 is 0x61. Try this first and let me know if this works or not.

image

Best,

Tyler