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  • TI Thinks Resolved

UCC21222: Q1

Prodigy 30 points

Replies: 7

Views: 756

Part Number: UCC21222

Dear support,

We are looking for a similar product as UC21222 that have only one specific change:

Instead of the following UVLO behavior:

We need the following behaviour:

Is there any device similar to UC21222 that have opposite outputs in case of UVLO?

Thank you.

  • Hi Abdelaziz,

    Which data sheet did you clip that second table from?

    Best regards,

    Don Dapkus

    Gate Driver Applications Engineering Manager

    Dallas, TX USA

  • In reply to Don Dapkus:

    Hi Don,

    Thank you for your quick reply.

    The second table does not exist in any datasheet, I modify the first table using mspaint to explain what I need.

    I hope there is a device that meet this need.

    Thank you in advance.
  • In reply to abdelaziz Samir:

    Hi Abdelaziz,

    Let me ask my colleague to reply on Monday, Dallas time.

    Best regards,

    Don Dapkus

    Gate Driver Applications Engineering Manager

    Dallas, TX USA

  • In reply to Don Dapkus:

    Hi Abdelaziz,

    It occurred to me later in the day yesterday that this is a very difficult request. If UVLO is tripped, that means the power supply is under spec. I'm not sure how we would drive an output high when the power supply is below spec.

    Is it ok if I reach out to you via the email address you have registered in your my.ti.com account to discuss your requirements further?

    Best regards,

    Don Dapkus

    Gate Driver Applications Engineering Manager

    Dallas, TX USA

  • In reply to Don Dapkus:

    Hi Don,

    Thank you for your feedback.

    For sure you can contact me on my email address.

    Here is our context, we use your device to control a PMSM (Pemanent magnet syncronous machine), and its safe state is an Active Short Circuit, to drive an active short circuit we need to put the OUTA Low and the OUTB = High.

    I agree with you, if the VDD is lost all outputs will go down, My request consern only UVLO on VCCI when VDD is alive.

    The request is if VCCI is lost and VDD is still OK, drive the outputs (OUTA = Low and OUTB = High) or  (OUTA = High and OUTB = Low) this will lead automatically to an active short circuit.

    Do not hesitate to contact me on my email address.

    Thank you.

  • In reply to abdelaziz Samir:

    Hi Abdelaziz,

    Thanks for the additional information. I will contact you via email.

    Best regards,

    Don Dapkus

    Gate Driver Applications Engineering Manager

    Dallas, TX USA

  • In reply to abdelaziz Samir:

    Hi Abdelaziz,

    Thanks for the additional information.

    I will reach out to you via email.

    Best regards,

    Don Dapkus

    Gate Driver Applications Engineering Manager

    Dallas, TX USA

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