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need help for LM96551 power supply

kuda wu
Prodigy 190 points

Dear sir,

I have to choose LM96551 as my ultrasound HV pulser, but power supply for LM96551 VNN, VPP and VSUB, I can't find any document or reference designs.

Who can help me to make recommendations? Thanks so much.

                                                                                          kuda

  • 0
    TI__Genius 15975 points

    Hi kuda,

    The LM96551 ultrasound HV pulser supply sequence should be started with the VSUB being the most negative potential.

    The recommended sequence of power-up & power voltages is (This sequence is required to prevent the part getting blowed up):

    The power voltages are based on the Absolute Max. Ratings in the datasheet.

    1. VSUB = -65V (it can be as high as -55V with the condition being VPP not being more than +50V)

    2. VNN = -50V

    3. VLL = 3V

    5. VDN & VDD (you can choose to power up VDN before VDD) = -10V & +10V (respectively)

    6. Last VPP = +50V

    Similarly the power down sequence should be the reverse order:

    1. VPP

    2. VDD & VDN

    3. VLL

    4. VNN

    5. Last VSUB

    The collateral for the reference designs will be made available when  you buy the boards at http://www.ti.com/tool/tx-sdk-v1.

    Thanks,

    Rohit