DRV2625: driving two linear vibrators

Adam Daluga

Part Number: DRV2625

Hello,

I was looking to use the DRV2625 to drive two tied together linear vibrators at the same time. Do you foresee (or have you seen) and downsides/concerns doing this?

Best,

Adam

over 5 years ago

0 Luis Fernando Rodriguez S. over 5 years ago

TI__Guru* 84915 points

Hi, Adam,

We recommend to drive 1 LRA per driver. You can drive two LRAs with some limitations, as the device would need to be used in open-loop mode.

You can refer to this previous post for further information. It applies to the DRV2625 too.

https://e2e.ti.com/support/motor-drivers/f/38/p/693082/2555599#2555599

Let me know if you have questions or comments on this.

Best regards,
Luis Fernando Rodríguez S.

0 Adam Daluga over 5 years ago in reply to Luis Fernando Rodriguez S.

TI__Expert 6385 points

Thanks Luis,

Then what haptic driver IC solution or configuration do I need to use to driver two linear vibrators simultaneously with those benefits supported?

0 Luis Fernando Rodriguez S. over 5 years ago in reply to Adam Daluga

TI__Guru* 84915 points

Hi, Adam,

Unfortunately, we don't have a single IC solution to support two LRA with the benefits explained in the e2e thread that I mentioned. All our LRA drivers share a similar closed-loop architecture and it cannot be used with multiple loads. As mentioned before, the only solution would be to use the haptics driver in open-loop mode, but its behavior is limited. Two ICs would be needed to handle two LRAs with those benefits.

Best regards,
Luis Fernando Rodríguez S.

Motor drivers

Motor drivers forum

DRV2625: driving two linear vibrators