DRV2624: Powering vibration motors using DRV2624 and signal generator

Brendan Lin

Part Number: DRV2624
Other Parts Discussed in Thread: DRV2603, DRV8601

Tool/software:

Hi, please pardon my ignorance, I am not an electrical engineer by trade. I am prototyping a variety of linear resonance actuator vibration motors, which need to be powered by AC, at about 2 V_rms, current levels between 50 mA and 200 mA, and frequencies between 70 and 240 Hz. I have a function generator that is able to produce my desired frequency and voltage. I am having trouble producing enough current to power the motors. I tested the function generator at 2.00 V_rms and measured a current of 31.9 mA.

How can I amplify the current to around 200 mA while maintaining the voltage and frequency?

Thank you very much!

7 months ago

0 Hailong Chen 7 months ago

TI__Expert 3480 points

Brendan,

Thanks for reaching out. It seems your function generator cannot support the current you need. Our DRV2624 can support your device given the info you provided.

If you haven't, feel free to order an EVM at https://www.ti.com/tool/DRV2624EVM-CT to test it out.

Best,

Hailong

0 Brendan Lin 7 months ago in reply to Hailong Chen

Prodigy 10 points

Hi Hailong,

Thanks for this info. Would you recommend any of the other drivers, or is DRV2624 the best for my application? I am hoping for the simplest solution possible, which would require the least additional circuitry/configuration. I see other options such as DRV2603.

Thanks!

0 Hailong Chen 7 months ago in reply to Brendan Lin

TI__Expert 3480 points

Brendan,

TI's simplest solution for LRA would be DRV8601. It also has the lowest cost and require the least additional circuitry.The DRV8601 drives up to 400 mA from a 3.3-V supply, which is sufficient for your current requirement.

Best,

Hailong

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DRV2624: Powering vibration motors using DRV2624 and signal generator