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Original question:

TPSI3050-Q1: schematic review

TPSI3050: tps3050 and tpsi3050s

lin liu
Prodigy 50 points

Part Number: TPSI3050

Hi I reviewed the TPSI3050 datasheet and forum. I have aquestion aboat tpsi3050 and tpsi3050s.

Can I understand it as meaning that tpsi3050/tpsi3050s all can be used to keep the MOS in continuous conduction?

  TPSI3050S: VDDP supplies power to the isolated VDDH. Control the ON/OFF state of the MOS transistor through the EN  logic level.

  TPSI3050: EN PIN  supplies power to the isolated VDDH and VDDP. Control the ON/OFF state of the MOS transistor through the EN threshold voltage(6.5V) .

  Is the above content correct? I have based this design on it and created the relevant switch schematic diagram. Could you please help me review schematic diagram?

image.png

 

 

  • 0
    TI__Expert 8931 points

    Hello Lin,

    Thanks for joining E2E and reaching out to our team!

    lin liu said:

    TPSI3050S: VDDP supplies power to the isolated VDDH. Control the ON/OFF state of the MOS transistor through the EN  logic level.

      TPSI3050: EN PIN  supplies power to the isolated VDDH and VDDP. Control the ON/OFF state of the MOS transistor through the EN threshold voltage(6.5V) .

    Both TPSI3050 and TPSI3050S can receive power like this, I recommend using TPSI3050 in your application since TPSI3050S only sends single VDRV pulse when EN goes high. TPSI3050 will keep VDRV high when EN is high.

    I illustrated suggested sch changes below. Can you share whether you need to pass emissions compliance testing (like CISPR 25 or CISPR 32) for your application? If yes, need to recommend additional components.

  • 0 in reply to Tilden Chen
    Prodigy 50 points

    Hi Tilden,

    We don't need to pass emissions compliance testing (like CISPR 25 or CISPR 32).OK,I will  modify it according to your suggestions.

    do you have the 48V(transient 100V) single high side gate driver(sink/source 1A current) recommendation? We need non-isolated and non-current detected.

     

  • 0 in reply to lin liu
    TI__Expert 8931 points

    Hi Lin,

    Thanks for your reply. 

    I help support solid-state relay products (TPSI devices), let me try to find someone to help you with high-side gate driver.

  • 0 in reply to Tilden Chen
    TI__Intellectual 2780 points

    Hi Lin,

    We do not have any purely high side non-isolated drivers in our portfolio, however there are methods to use our low-side drivers as a high-side driver (outlined in this FAQ). 

    Thanks,

    Annabelle