DRV2700EVM-HV500: Piezocermic trimorph bending actuator

Basic Load

Hello,

New and not know much about of Piezos, but I have DRV2700EVM-HV500 and got few piezocermic trimorph bending actuator. So can I drive bender with this evaluation board? Bender guide says "It is suggested to use a series resistor. For switching it is suggested to discharge and short-circuit the passive piezo ceramic via a resistor"

4 months ago

0 Sydney Northcutt 4 months ago

TI__Expert 6620 points

Hello,

Could you provide the Bender guide so I can further evaluate?

Regards,
Sydney Northcutt

0 Basic Load 4 months ago in reply to Sydney Northcutt

Prodigy 10 points

Hello,

Thank you for answer. Here is schematic.

0 Sydney Northcutt 4 months ago in reply to Basic Load

TI__Expert 6620 points

Hello,

I believe this is possible and you could try it out. Refer to the image below to see if the output voltage and load current align with your actuators needs, also considering the capacitance and desired drive frequency. This EVM can provide about 1W of drive strength.

Regards,
Sydney Northcutt

0 Basic Load 4 months ago in reply to Sydney Northcutt

Prodigy 10 points

Hello,

Thank you table.

But do I have to drive this bender with DRV2700EVM-HV500 like "monomorph"? Or is it possible diy or buy "switching resistor" for DRV2700EVM-HV500 to drive as should trimorph piezo. Or do I need in more sophisticated control?

0 Sydney Northcutt 4 months ago in reply to Basic Load

TI__Expert 6620 points

Hello,

I think you can connect the bender directly to the EVM. Can you provide a spec sheet, data sheet, or user guide for this bender?

Regards,
Sydney Northcutt

Audio

Audio forum

DRV2700EVM-HV500: Piezocermic trimorph bending actuator