• State Resolved
  • Locked Locked
  • Replies 4 replies
  • Subscribers 99 subscribers
  • Views 703 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

66AK2E05: K2E evm power supply

Shreenidhi Patil
Expert 4126 points
Part Number: 66AK2E05
Other Parts Discussed in Thread: TPS544B20, TPS544C25

Hello team ,

Please help me out with the query shown below in the mail chain

 

Can we go use the TPS544B20 with the K2E EVM

 

 

1) K2E EVM uses TPS544C25 power module to provide SoC CVDD supply. This module supports both VCNTL and PMBus interface for AVS implementation but the efficiency of this power module is less(max up to 89%).

 

2) We want to support alternative part TPS544B20 for CVDD power supply generation which can provides better efficiency (max up to 92%) but this part only support PMBus mode for AVS implementation.

 

3) We have design sch such that we can support both TPS544C25 and TPS544B20 using some resistor mounting options.

  • 0
    TI__Guru**** 161600 points
    Hi,

    I'm looking into this. I'll post my feedback shortly.

    Best Regards,
    Yordan
  • 0
    TI__Mastermind 42545 points

    Hi Shreenidhi,

    The first major difference between the TPS544C25 and the TPS544B20 is the amount of current supported by both parts. The TPS544C25 can support up to 30A while the TPS544B20 can only support 20A. Have you used the power consumption model to determine the necessary current needed for your design?

    I do not see the difference in efficiency that you stated in the current data sheets for these parts. In fact, for a 1V output the TPS544C25 appears to be slighly more efficient operating between 90% to 87% between 12A and 20A using a 12V Vin. The TPS544B20 is operating between 88% and 86% in the same conditions. 

    The TPS544B20 appears to support the same type of AVS interface as the TPS544C25. I'm not sure why you think that it only supports PMBus but there is software in the releases for K2E that supports SmartReflex class0 with temperature compensation using an I2C interface connected to the PMBus. 

    Regards,

    Bill

  • 0 in reply to Bill Taboada
    TI__Expert 4126 points
    Thank you bill

    So based on the explanation I am assuming you are saying
    We can use both dc/dc with k2e
  • 0 in reply to Shreenidhi Patil
    TI__Mastermind 42545 points

    Hi Shreenidhi,

    If your settings in the power consumption model shows that the K2E will draw less then 20A then both parts can be used.

    Regards,

    Bill