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DRV8803: Jitter in output of DRV8803

Rakeshkumar Yadav
Prodigy 10 points
Part Number: DRV8803

Tool/software:

Hello,

I am using the DRV8803PWPR Quad Low-Side Driver IC.

At output pin i have connected 2.2Kohm resistor and output supply voltage is 24V.

I have placed 100u and 0.1uF capacitor close to IC.

I am getting jitter around 494ns for 100KHz frequency. Why this jitter is coming as my input signal is clean.

How can eliminate this jitter.

  • 0
    TI__Mastermind 19860 points

    Hello,

    The output jitter is from the input edges that are synchronized (sampled) with the internal digital clock. A digital synchronizer is used for further processing within the output control logic. Because of the asynchronous nature of the INx, the edge synchronizer output could see a variance up to two clock periods which renders as output jitter. This is a behavior in many of our brushed-DC motor drivers. This jitter is common when synchronizing asynchronous input signals.

    Best,

    David

  • 0 in reply to David Medis
    Prodigy 10 points

    Hi David,

    How can I eliminate or reduce it is there any way.

    I want quad low side driver for 250KHz frequency with protection for 24V input supply can you suggest any TI?

  • 0 in reply to Rakeshkumar Yadav
    TI__Mastermind 19860 points

    Hello,

    There isn't a way to get rid of this from a device standpoint. It doesn't cause issues in motor driver applications. Are you seeing any issues?

    The DRV8803 on supports PWM frequencies up to 100kHz. 

    The DRV8952 supports up to 200kHz.

    We are still building our portfolio for low-side drivers that can support higher frequencies. What's the timeline for start of production?

    Best,

    David