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TDC1000-BSTEVM

Lars Jentsch
Prodigy 70 points
Other Parts Discussed in Thread: UCC27531, TDC1000

Hello


This morning the TDC1000-GASEVM with TDC1000-BSTEVM arrived.

I already use the the TDC1000-GASEVM with an ultrasonic transducer, so firmware update etc. was no problem.

But I can't get the booster-board to work...the tx signals are there the Vdd1_EN and Vdd2_EN signals are there depending on the time enter in the setup window...so everything fine.

After a while i realized that R7,R10,C5,R17,R19 and C9 are not equipped. That means there will never be any vdd to both UCC27531 ?

Looking to the sniu026 document i realized its the same in the picture on page 17 but the text for C5/R7 and C9/R17 have interchanged ?

Any suggestions? Can I close R10 and R19 with solder ?

Thanks LJ

  • 0
    Prodigy 70 points
    Addition:
    I found it the problem here is that i have to set the booster power enable to 1000ms or a least to very big values to get the ~30V maybe that is because the AVDD is 3.6V and not 5V?
    With 1000ms i have about 27V and it is still rising.
  • 0 in reply to Lars Jentsch
    TI__Expert 4725 points

    Lars,

    R19 shouldn't be populated.  The purpose of Q1/Q2 and Q3/Q4 are to remove power from the UCC parts U2/U3 after transducer excitation is complete to tristate the U2/U3 driver output which allows the TDC1000 to receive the echo.

    First make sure you've downloaded the latest GUI (ver 1.2.3.0) and the matching firmware (ver 1.43) from here: http://www.ti.com/tool/tdc1000-tdc7200evm

    Make sure the "Continuous Trigger Mode" is selected on the TDC1000 tab (green Toggle switch).

    Make sure HV Boost Enable EN is checked.

    Enter a value of 65535 in "Enable Period" box. I maximum of approximately 65ms is possible with firmware. If you need longer you can Remove R4 and add R3 back in the on the BSTEVM board to always enable the HV boost circuit.

    For the 30V, you can check that on TP2 of the TDC1000-BSTEVM PCB.

    -regards,