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A3977 pin for pin with DRM8811?

Jamaal_Charles
Genius 3245 points
Other Parts Discussed in Thread: DRV8811, DRV8818

Hello,

I wanted to confirm that the DRV8811 is a pin for pin replacement for the A3977.  I think AOUT2 and BOUT1 are swapped between the 2 parts.  Is that correct?

Thank you

  • 0
    TI__Guru 71526 points

    From the A3997 datasheet:              and the DRV8811 datasheet:

    4 DMOS H Bridge 1 Output A              4 O Bridge A output 1

    11 DMOS H Bridge 2 Output A          11 O Bridge B output 1

    18 DMOS H Bridge 2 Output B           18 O Bridge B output 2

    25 DMOS H Bridge 1 Output B           25 O Bridge A output 2

    As well, XRef shows:

    A3977 A3977SLP-T DRV8811 DRV8811PWP
    		ACTIVE 1.9A Bipolar Stepper Motor Driver with On-Chip 1/8 Microstepping Indexer (Step/Dir Ctrl) S: Direct Replacement

    no functions are swapped, just the naming convention.

  • 0 in reply to LeonardEllis
    TI__Guru** 114905 points
    Hi Jaamal,

    In addition to the DRV8811, the DRV8818 is pin compatible with higher current but a lower voltage rating.