DRV2605L: Power efficiency of DRV2605L

Poki Huang

Part Number: DRV2605L

Tool/software:

Do DRV2605L have power efficiency information?

I want to estimate VDD current

For example my LRA rated voltage/current is 0.7VrmsAC / 90mArms, the VDD current will be 0.7V*90mA/(VDD*power efficiency)

Thank you

Poki

3 months ago

0 Kelly Griffin 3 months ago

TI__Genius 11062 points

Hi Poki,

I looked back at the data we have on efficiency and below is what I found. I think ~85% is a good value to estimate VDD current for a 0.7Vrms output voltage.

~92-93% efficiency for condition: LRA mode, open-loop, 3.3V to 5.2V, 25ohm load, max output.

0 Poki Huang 3 months ago

Expert 1080 points

Hi Kelly:

So how about close loop efficiency?

Thank you

Poki

0 Kelly Griffin 3 months ago in reply to Poki Huang

TI__Genius 11062 points

Hi Poki,

I wasn't able to find previous data for closed-loop efficiency.

We do have this haptics report: Haptic Energy Consumption (Rev. A)

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DRV2605L: Power efficiency of DRV2605L