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DRV2667: Question about DRV2667

Chase Jeong
Mastermind 9745 points

Part Number: DRV2667
Other Parts Discussed in Thread: DRV2700, DRV2665

Dear TI experts,

My customer have questions about DRV2667.

1. In the description, max output voltage is 200V.

-> Can it make the output voltage from 0V to 180V? (should not go to negative voltage.)

2. What is differences among DRV2667, DRV2665 and DRV2700?

(I just found that DRV2667 and DRV2665 are pin to pin compatible, and DRV2700 does not support I2C.)

Please check these issues. Thanks.

Best regards,

Chase

  • 0
    TI__Genius 17695 points

    Our expert will feedback you next working day.

  • 0 in reply to Shenghao Ding
    Mastermind 9745 points

    Dear Shenghao,

    Please let me know if there are any updates about the question above.

    Best regards,

    Chase

  • 0 in reply to Chase Jeong
    TI__Expert 7340 points

    1) No. The peak to peak to voltage is 200V. The boost max voltage is 105V. A higher external boost voltage achieve the 0-200V output for single-ended configuration.

    2)  While all three share the same boost/amplifier architectures, they differ mainly in digital control features and memory.

    • DRV2667: The most featured, it includes I2C control, a waveform synthesizer, and 2-kB of internal waveform memory for storing/recalling haptic waveforms.
    • DRV2665: Pin-to-pin compatible with the DRV2667, but does not have the internal waveform memory or the synthesizer found in the DRV2667. It is controlled via analog input or I2C commands for real-time streaming, but cannot store custom waveforms on-chip.
    • DRV2700: Does not support I2C; it is analog-input-only. It is a fully differential driver but relies on external input signals for waveform generation.
  • 0 in reply to Hailong Chen
    Mastermind 9745 points

    Dear Hailong,

    Thank you for your support.

    1. DRV2667 can make max voltage up to 105V. So it can make output voltage from -95V to 105V because peak to peak voltage is 200V. -> Am I right?

    2. Do you have any ideas to make external boost voltage up to 200V for single ended configuration?

    2-1. In this case, will the output voltage be 0V to 200V?

    Best regards,

    Chase

  • 0 in reply to Chase Jeong
    TI__Expert 7340 points

    Not exactly. While the DRV2667 can achieve a 200 Vpp (peak-to-peak) output, it does so through a differential output (OUT+ and OUT-) rather than a negative voltage swing.When OUT+ is at 100V and OUT- is at 0V, the difference is +100V. When they flip, the difference is -100V. This provides the 200 Vpp across your actuator without the device ever generating a true negative voltage relative to ground.

    If you truly need a 200V single-ended swing, you would typically need a different architecture, such as:

    • High-Voltage Operational Amplifier: A dedicated high-voltage op-amp capable of 200V+ rails.
    • Discrete Driver: A custom circuit using high-voltage MOSFETs and a dedicated 200V boost controller.
    • Transformer-Based Driver: Using a lower-voltage driver and a step-up transformer to reach higher single-ended peaks.