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DRV2605L: Design questions

Che Wen Yeh
Expert 1260 points

Part Number: DRV2605L
Other Parts Discussed in Thread: DRV2625, DRV2605

Hi Teams,

1.Do you have any recommended motor vendors/specifications/models for the DRV2605L?

2.What are the main applications of the DRV2605L? We plan to use it in a game controller—do you have any other recommended models?

3.Is f(LRA) the operating frequency of the motor?

4.What is the vibration frequency range of the motors that the DRV2605L can drive?

  • +1
    TI__Genius 11152 points

    Hi,

    1. This driver is compatible with most LRAs or ERMs designed for haptics. We do not have a specific list of actuators. In general, you should look for actuators within the limits of the device, VDD (2V - 5.2V), Impedance >8Ω, resonance 125-300Hz. 

    2. The DRV2605L is capable down to 2V, so this is typically seen in applications requiring lower voltage batteries. Otherwise, the DRV2605 or DRV2625 device can be considered. All of these devices are broadly used across the haptics space.

    3. The f(LRA) is the auto-resonance tracking frequency range - the range that is supported in closed-loop mode for LRA applications. 

    4. The open-loop frequency range is much wider. The PWM input can be 10kHz to 250kHz and the output frequency is this value divided by 128. So the open-loop range is roughly 78Hz to 2kHz. Most LRAs are in the 90-150Hz range - this is the typical haptic range for the best response.