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DRV8803: Using DRV8803 or DRV8860 as digital output in PLC IO module

Part Number: DRV8803
Other Parts Discussed in Thread: DRV8860, DRV8955

Dear experts,

My customer is looking for PLC digital output IO module design that requires 24Vinput and each channel 500mA current ability. When I promote our DRV8803, they mentioned in our 4ch output, if one channel's output load is error and working abnormally, the other channels would also stop working. Is that understanding correct? Because in their system, they want that if one channel report error, the rest channels should not be influenced by this situation. 

Do you have any suggestions? Is DRV8860 the same concern?

  • Hi Zoe,

    The DRV8803 and DRV8860 disable all output channels if OCP (overcurrent) error is detected in any half-bridge. The DRV8955 is a good alternative to the 8803 and 8860 with the added benefit of only the Channel experiencing OCP becoming disabled, all others will continue normal operation.

    Recommend the DRV8955 and let me know if they have any question.

    Regards,

    Pablo Armet

  • Hi Pablo,

    Just saw this post and was curious.
    The DRV89xx datasheet (-12 specifically for 12x outputs) has OCP; and mentions each channel is controlled individually in overcurrent events.
    Is my understanding correct on these parts?

    What current can DRC8912 handle if all outputs were working at the same time at full load?

    Regards,
    Darren

  • Hi Darren,

    You are correct the DRV89xx multi channel drivers will disable only the affected half-bridge during OCP fault. When all outputs are paralleled, the driver an handle up to 6-A peak.

    Regards,

    Pablo Armet