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UCC27201A: UCC27201 supply currents

Mat!
Prodigy 60 points
Part Number: UCC27201A
Other Parts Discussed in Thread: UCC27201

Hi team,

I have a question about UCC27201 supply currents as described in datasheet page 6.

What is IHBSO (HB to VSS operating current ) ? Is it the leakage operating current between the high-side driver and the low-side driver ?

Because IDDO (VDD operating current) is the supply of the low-side driver and IHBO (Boot voltage operating current) is the supply of the high-side driver.

Here you are a schematic.

BR,

Mathieu

  • 0
    TI__Genius 13445 points

    Hello Mathieu,

    Thanks for reaching out. 

    IHBSO is the HB to VSS quiescent current which typically occurs during the replenishing cycle of the bootstrap capacitor when the low-side FET is on, high-side FET OFF.

    Please let us know if you have additional questions.

    Regards,

    -Mamadou

  • 0 in reply to Mamadou Diallo
    Prodigy 60 points

    Ok, thank you for your quick answer and the detailed description !

    Maybe it depends slightly of duty cycle. I update schematic with two different input signals of 50% duty.

    Do you think it's correct test schematic to characterize supply currents ?

  • 0 in reply to Mat!
    TI__Mastermind 21160 points

    Hello Mat,

    I work with Mamadou supporting half bridge drivers and can help with the question. The schematic you show looks correct regarding characterizing the UCC27201/A operating currents.

    Confirm if this addresses your questions or you can post additional questions on this thread.

    Regards,