DRV2605L: Current Consumption is High

Hi, please check out the DRV2624/25. These devices are designed for low-power applications like wearables.

If you need a leaded package, then DRV2605L is the only option with the VSSOP package. 

I'm not sure I understand your findings on the current consumption.. In general, when not in use, put the device in Standby and consume <7uA. The current consumed by the device in Active mode is <0.65mA.

The device current when driving an output signal in LRA or ERM mode is <3.5mA -- I'm pretty sure this is in open loop for testing purposes. The output is a class-D signal at 90% duty cycle -- so near max output voltage when supplied by 3.6V.

Hi Kelly,

Thanks for the quick response , really appreciated.

Okay I understood that the Closed loop current will be lower than the 3.5mA. Just want to understand that which current has been shown in the figure 10 ?

As My LRA part needs 170-200mA max as per the spec so the internal H-bridge is able to provide this right ? As I am unable to derive this from the Datasheet of DRV2605L.

What about the Electrical / Mechanical noise observation when Vibration in LRA because in ERM we are feeling the more noise when vibration increases ? Is driver helps in this noise reduction ? If yes then how ? I can see some noise filters are they referring to this noise ?

In terms of the cost are there any low cost part than the DRV2605L or DRV2624/25 ? 

Regards,

Mahammadirfan Saiyed

Hi,

We'll take a look at your latest inputs and come back with further comments early next week. Please allow for some time during the holidays.

Best regards,
-Ivan Salazar
Applications Engineer

Hi,

I see how this plot can be confusing. Both of these lines are in closed loop and include the actuator current as well as the quiescent current (full supply current). There is a typo here. The "ERM Mode, RL = 25Ω..." is actually LRA mode, hence the RMS voltage. 

You can drive this LRA, but you may need to disable closed-loop per the Vybronics website. The load current will be a product of the impedance and the voltage you drive.

As for noise considerations, consider how the LRA is mounted to the product.. There is not much TI can do here. In general, when the LRA is driven with higher voltage, the noise can increase.

These products will be out best solution. As for cost, you can work with your sales representative on cost if the volume is significant. 

Dear Kelly,

Thanks for your feedback.

I want to understand more on below , from where do you found this details ? Because I want to use the driver for closed loop functionality to derive the accuracy. 

"You can drive this LRA, but you may need to disable closed-loop per the Vybronics website. The load current will be a product of the impedance and the voltage you drive."

Regards,

Mahammadirfan Saiyed