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DRV2510-Q1: Output abnormal issue

Zirui Su
Expert 5340 points
Part Number: DRV2510-Q1
Other Parts Discussed in Thread: DRV2604, DRV2624

Hi team,

Customer reported to me an abnormal output issue. Here is the waveform test result and I collected their schematic design:

1. Pin 6 waveform:

2. Pin 11 waveform:

3. Pin 12 waveform:

Customer schematic:

Software configuration: (just config 0x03 register to be 0x20)

When we read back the register value, we could see the 0x01 register value not fixed, the read back value  is not fixed, it may be 0x00 or 0x08.

Could you please kindly check the information above especially the schematic and software configuration of DRV2510Q1? Thank you!

  • 0
    TI__Genius 16840 points

    Hi Jerry,

    thank you for the detailed explanation.

    I think that in this case the output over current protection is being tripped (register 0x01 = 0x08). I suspect this is because of capacitors C137,C138. since this part is a Class D amplifier its not suited to drive a capacitive load, because the fast PWM edges will cause high dV/dt current into the decoupling capacitors on the output.

    these capacitors can be removed to test this. If the customer wishes to use decoupling capacitors in this way they can add inductance, such as a ferrite bead in the place of R160, R154 this will limit the sharp current spikes

    Regards,

    Arthur

  • 0 in reply to Arthur Brown
    TI__Expert 5340 points

    Hi Arthur,

    Thanks for your reviewing. Besides, I also collect the customer load spec, could you please kindly take a look at this to see whether DRV2510Q1 is ok to drive the load? Do you mean we could remove C137 and C138, at the same time use ferrite bead replace R160 and R154 to do the test? What is your recommendation of the ferrite bead? Thank you again.

    BHS1324-11-08H6.5-01规格书-1.pdf

  • 0 in reply to Zirui Su
    TI__Genius 16840 points

    Hi Jerry,

    C137,138 populated , FB in R160,154 - OK

    C137,138 populated, 0 ohm in R160,154 - Not OK

    And the DRV2510 can drive that load it is all within spec. however what is the desired application? is this for Audio, or for only haptic feedback?

    If this is for only vibration(haptics) than a part such as DRV2604/ DRV2624 might be more suitable. since this actuator has a steep resonance peak the DRV2624/04 could use the auto resonance algorithm to maximize vibration and minimize power consumption

    These parts can also be controller entirely through I2C or hardware trigger.

    Regards,
    Arthur