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DRV2603: Overcurrent Protection

K.Yaita
Guru 29690 points
Part Number: DRV2603

Hi Team,

My customer considers to use DRV2603 for ERM driver.
I would like to ask the following.

1)
The datasheet shows the following overcurrent protection feature but I couldn't find typical overcurrent threshold.
(page 8)

Could you tell me where should I see to confirm the threshold value?

2)
Is there any graph such as the following for DRV2603?
x-axis: load current
y-axis: output voltage

Best Regards,
Yaita / Japan disty

  • 0
    TI__Expert 8711 points
    Hi Yaita,

    1. The overcrrent threshold is implied by the minimum load impedance specification, 8 Ohms at 5.2V. This calculates to 650mA and accounts for margin.
    2. This would have to be done for a specific ERM. The way to calculate it would be to add the quiescent current to the load current. Load current would be the output voltage divided by the ERM resistance. I only have data for LRAs.
  • 0 in reply to Kelly Griffin
    Guru 29690 points

    Hi Kelly-san,

    Thank you for your kind support.
    Regarding question 2, could you tell me why we should add the quiescent current to the load current?

    Best Regards,
    Yaita

  • 0 in reply to K.Yaita
    TI__Expert 8711 points
    The quiescent current will account for the current consumption of the device in addition to the load current. The quiescent current is much smaller than the load current and can be ignored in most cases.