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DRV2624: Questions of the Maximum Load Current and Current Limit Resistor Design

Wayne Chen (Audio AE)
Genius 15950 points
Part Number: DRV2624

Hi Sirs,

We have two questions need product line's suggestions:

1. What's the maximum load current of the DRV2624? We did not see this specification in the datasheet.
2. If a current limit resistor was placed in series of the LRA. Will it impact close loop performance? If so, what's the maximum resistance we recommended?

Thank you and Best regards,

Wayne Chen
01/11/2017

  • 0
    TI__Genius 10402 points
    Hi Wayne,

    1. The max current can be found from the recommended min resistance at max voltage. At VDD = 5.5V, the driver can output ~5.1V and the recommended minimum resistance is 8Ohms. So max load current is ~640mA.
    2. We do not recommend using a current limiting resistor. This will affect the driving portion of the closed loop operation.
  • 0 in reply to Kelly Griffin
    TI__Genius 10402 points
    Hi Wayne,

    Correction: I should have actually used the "Load impedance threshold for over-current detection" resistance value = 4Ohm. So the max current is actually closer to 1.275A.