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DRV8876: DRV8876 - Independent Half-Bridge

Part Number: DRV8876

Hello, I'd like to know if can I left unconnected pins VREF, IPROPI, IMODE and PMODE at Independent Half-Bridge connection?

Thanks

Regards

Leandro Schmitz

  • Hi Leandro,

    PMODE can be left unconnected since this sets Independent Half-bridge mode.

    IMODE depends on the desired action when an overcurrent event occurs. Please refer to the second column of Table 6

    Since you do not intend to read IPROPI, it is recommended to connect the IPROPI and VREF as though it is disabled. Please to the following paragraph from section 7.3.2.2 in the datasheet:


    The internal current regulation can be disabled by tying IPROPI to GND and setting the VREF pin voltage greater than GND (if current feedback isn't required) or if current feedback is required, setting VVREF and RIPROPI such that VIPROPI never reaches the VVREF threshold. In independent half-bridge control mode (PMODE = Hi-Z), the internal current regulation is automatically disabled since the outputs are operating independently and the current sense and regulation is shared between half-bridges.