• State Resolved
  • Locked Locked
  • Replies 3 replies
  • Answers 1 answer
  • Subscribers 39 subscribers
  • Views 459 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.

TIDA-010208: TIDA-010208 Sch connect point question

Chao Fu Chen
Intellectual 1170 points
Part Number: TIDA-010208
Other Parts Discussed in Thread: BQ77216, BQ76952, , BQ769142, BQ76942

Hi Team,

My customer is interesting in BMS application , so he refer to this reference design.

But he still have some question wonder to ask about the SCH some of connect seems is wrong and the SCH not final revision that he can not to do by themselves.

The first is SCH page 2 FUSE , FUSE_AFE and FUSE_MCU is the same way to trigger FUSE to stop the system to protection , but only the FUSE MCU have the diode D29. Is the FUSE _ AFE didn't need ?

The second is our block diagram has show the BQ77216 , but the SCH did not show on there. where is it ?

The third is TLV70433 input have two way that we display red word to said on the SCH(5V and AFE_5V) , but only can see the 5V on there. Is it correct ?

The final is why the cell 10 to cell16 input need the 0ohm resistor to short it ? and the cell7 to cell5 also do the same. Is it means this design only used 4cell ? or anything else ?

I discuss with customer engineer leader today .We think this SCH seems not the final vision , so we'll see some part is lost and some connect have some wrong on this SCH.

Could you please provide the final one or complete SCH ? Thanks!

Eddie   

  • 0
    TI__Expert 3356 points

    Hi Eddie,

    The sch on ti.com is the final version, please see my comments for your questions: 

    The first is SCH page 2 FUSE , FUSE_AFE and FUSE_MCU is the same way to trigger FUSE to stop the system to protection , but only the FUSE MCU have the diode D29. Is the FUSE _ AFE didn't need ?

    Ryan: FUSE_AFE doesn't require a diode, since the maximum rating of FUSE pin of BQ76952 is much higher than 3.3V (MCU output), another reason is that BQ76952 uses FUSE pin to detect if fuse is triggered by any external signals, a diode will block BQ76952 sensing these signals. 

    The second is our block diagram has show the BQ77216 , but the SCH did not show on there. where is it ?

    Ryan: In TIDA-010208, BQ77216 EVM is used to perform the secondary protections, I didn't draw the BQ77216 on the main board sch since I believed that the EVM sch is good enough. I have claimed this in TIDA-010208 design guide: www.ti.com/.../tiduey5.pdf

    The third is TLV70433 input have two way that we display red word to said on the SCH(5V and AFE_5V) , but only can see the 5V on there. Is it correct ?

    Ryan: Please refer Page1 of the sch, there is a diode between AFE_5V and 5V. The diode is to make sure MCU is powered by DC/DC 5V when working in normal mode, it can help to improve the power consumption in normal mode. 

    The final is why the cell 10 to cell16 input need the 0ohm resistor to short it ? and the cell7 to cell5 also do the same. Is it means this design only used 4cell ? or anything else ?

    Ryan: TIDA-010208 could cover BQ76942, BQ769142 and BQ76952 testing by modifying these 0ohm resisters, I created a table to describe how to modify these resisters in TIDA-010208 user guide: www.ti.com/.../tiduey5.pdf

    Please click "This resolved my issue" if no more questions. Thanks.

    Best Regards,

    Ryan Tan

  • 0 in reply to Ryan Tan
    TI__Intellectual 1170 points

    Hi Ryan,

    Thanks your comment in detail , i will translate to me costumer.

    And then they will follow this sch to design his own board to test, If they find any issue on his made board state.

    Could I sent the email or call from you by internal ? 

    Eddie

  • +1 in reply to Chao Fu Chen
    TI__Expert 3356 points

    Hi Eddie, 

    Of course. Always happy to help.

    Please click "This resolved my issue" if no more questions. Thanks.

    Best Regards,

    Ryan Tan