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  • RE: DRV8818: Motor noise caused by driver when hold current is active

    Hi Harm, Have you tried using a different motor or different driver? Does the issue show up? Harm Siebum said: Are you aware of mixed decay problems? Not in this specific case. in some motors and load conditions, it mixed decay may not be the best decay…
    • Answered

  • RE: DRV8818: DRV8818 First step after crossing zero has current oscillation

    Resolved
    Bryan, Current is not oscillating as before, but the tradeoff is higher current ripple. I suspect it is related to the blanking time around the zero current crossover. Some of our parts have "dynamic tblank" as described in the following datasheet.…
    • Answered

  • DRV8818EVM: replace DRV8818 with DRV8811

    Resolved
    Part Number: DRV8818EVM Other Parts Discussed in Thread: DRV8811EVM , DRV8811 , , DRV8818 Hi team, My customer needs DRV8811EVM for evaluation, but cannot find any stock from TI or disty. Can we use DRV8818EVM? It seems possible if we replace DRV8818 chip…
    • Resolved

  • DRV8818: IFS equation

    TI Thinks Resolved
    Part Number: DRV8818 Hi, In the datasheet, on page17, 8.2.2.2, IFS = VREF/(A*Risense) and in example, To achieve IFS = 1.25 A with RSENSE of 0.1 Ω, VREF should be 1.56 V. Is this equation correct? With 1.5V Vref, 0.2Ohm Risense, circuit is limited by…

  • DRV8818: How to set the motor to keep the functionality

    Part Number: DRV8818 Hi team, How do I set the pin to keep the motor functional? i.e. when moving to a specified position, the motor does not move and is applied torque. Could you help resolve this case? Thanks. Best Regards, Cherry

  • DRV8818: Input capacitance

    TI Thinks Resolved
    Part Number: DRV8818 Hello E2E, What is the input capacitance for Step and Dir inputs? Regards, Carlo

  • DRV8818: the maximum continuous output current

    TI Thinks Resolved
    Part Number: DRV8818 Other Parts Discussed in Thread: DRV8434S , DRV8434A Hi team, The customer intends to use use the DRV8818 to drive the stepper motor, and now would like to know the maximum continuous output current of the device, and is this continuous…
    • Answered

  • DRV8818: Stepper motor suffer from low position accuracy

    Resolved
    Part Number: DRV8818 Hi Team, We would like to ask your your help regarding our customer's inquiry below. We have use the stepper motor driver chip to drive a unipolar stepper motor with following specification, Part number: PJB42S33D16 Step Angle…
    • Resolved
    • Answered

  • DRV8818: inconsistent motor speed with fixed step timing in Full-step Mode.

    Resolved
    Part Number: DRV8818 Other Parts Discussed in Thread: DRV8424 Dear Forum, Dear TI Experts, we replaced a stepper motor driver due to EOL notice. On the legacy board, it was used a stepper motor driver from Allegro Micro Systems. A3977SED-T ( Stepper Motor…
    • Resolved
    • Answered

  • DRV8818: Cap value on VCP, CP1 and CP2

    Resolved
    Part Number: DRV8818 Hi Team, One quick question. Regarding the Cap for the CP, datasheet says as below. I understand TI recommends 0.22uF rated value but effective value is varied depending DC biasing, right? So my question is "how much effective value…
    • Resolved

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