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  • RE: DRV8871: PWM and bidirectional control of DC motor

    Mark Philip Felipe said: Switching at 20-40Khz and use an 8 bit value to determine the duty cycle. Since this is closed loop servo application, the output may theoretically change back and forth (CW or CCW) every 1 ms (or 1000 uS). In reality, the mechanical…
    • Answered

  • DRV8871: Can it drive a latching solenoid?

    Resolved
    Part Number: DRV8871 Other Parts Discussed in Thread: DRV8870 , DRV8876 Hi, We've selected the DRV8871 chip to drive the 12V 4W latching solenoid: DSML-0630-12C. However, we noticed in this topic here on TI forum that the DRV8871 is listed as not supporting…
    • Resolved

  • DRV8871: DRV8871

    Part Number: DRV8871 hi all, i use in my design DRV8871 and sample an overshoots on the IN1 and IN2 pins in the moment that i connect the supply (all other pins are unconnected). how it is possible? some has an idea? BR, Itzi
    • Answered

  • RE: DRV8871: In which PIN to apply PWM signal in DRV8871?

    Resolved
    Thank you very much Ryan. In my case, I am using Adafruit DRV8871 (which uses the TI driver DRV8871). I think that pin "PGND" and "GND" are already internally connected in the breakout board, as per this schematic (available here )…

  • DRV8871: Hot Swap / No Load Failure

    Part Number: DRV8871 Hello, We are using the DRV8871 to drive a brushed DC motor using motor with the following settings: * Load = Brushed DC motor * VM = 40V * Frequency = 5kHz * In1 duty = varies between 10% and 100% * In2 duty = 0% * Imot = Between…

  • DRV8871: Start-up current is too large

    Part Number: DRV8871 Other Parts Discussed in Thread: DRV8870 , hi team: my customer use DRV8871 and DRV8870 to evaluate the BDC ,but check with the DRV8871EVM board, we found this issue: 1.The normal starting current waveform is as shown in the figure…

  • DRV8871: How to measure load current for DRV8871

    TI Thinks Resolved
    Part Number: DRV8871 Other Parts Discussed in Thread: DRV8876 The way to measure load current: we insert high precision 1 ohm resistor between PGND pin and PCB ground。Then we amplifier the voltage signal across 1 ohm res and measure it by ADC. The issue…

  • DRV8871: How to measure load current of DRV8871

    TI Thinks Resolved
    Part Number: DRV8871 Other Parts Discussed in Thread: DRV8210EVM , DRV8251A The way to measure load current: we insert high precision 1 ohm resistor between PGND pin and PCB ground。Then we amplifier the voltage signal across 1 ohm res and measure it…
    • Answered

  • RE: DRV8871-Q1: coil load and current sense

    Resolved
    Hello Sherry, 1. I think so, but the customer needs to try and confirm. 2. The 0.5 ohm shunt resistor should support up to 1.4 A output current. We want to keep the voltage across GND to PGND above -0.7 V to avoid current flowing back through the FET…
    • Answered

  • DRV8871: Replacing DRV8871 with DRV8870 in mass production.

    Resolved
    Part Number: DRV8871 Other Parts Discussed in Thread: DRV8870 , DRV8872 Hi, Because of the supply problem, I consider replacing DRV8871 with DRV8870 in mass production. Discarding the IChip feature is acceptable. I wonder if it's theoretically feasible…
    • Resolved

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