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TPS65400: TPS65400 VREF Configuration in Fusion Digital Power Designer tool

Jonathan Geronga
Expert 7930 points
Part Number: TPS65400
Other Parts Discussed in Thread: USB2ANY

Hi Team,

Our customer is having trouble below to configure the default Vref voltage of the device TPS65400 regulator in hid customer board using the Fusion Digital Power  Designer tool 
1. TPS65400RGZR IC employed on one of the design boards reads a wrong I2C address for a resistor value of 82KOhm.

2. The default Vref voltage is 1.355V instead of 0.8V. I did try to program the IC to default values but of no use though the tool fusion digital power designer tool says successful in storing to NVM.

Here's what the customer has done to configure TPS65400 VREF:
- connect the device, the tool recognizes the device with the right I2C address
- then customer click on the option - click to configure device followed by changing the write protect mode to 0X00
- change the Vref to what's required- write to hardware and then store config to NVM
- It says saving device config(RAM) to flash memory
- but customer sees the default value even post configuration of the device

Let me know if you need more clarification with the customer inquiry.

Thanks.

Jonathan


  • 0
    TI__Genius 15135 points

    Hi, Jonathan 

    1. The issue happened on EVM or customer board??  

    I ever verified the fusion tool on EVM, it can write/change register successfully by importing .csv file. And I also remember I could change register value manually.  

    I attach a procedure for your reference.

    And suggest to take a try on another board.  

    2. And suggest to change I2C address, set I2C ADDR resistor (22.1kohm), then test again. 

    3. If customer is testing EVM by USB2ANY, there is another file: Fusion verify for TPS65400 report, in page 5, we should set EN2,EN3,EN4 enable on. 

    Fusion verify for TPS65400 report.pptx

    Fusion import csv file.docx