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  • DRV8840: Resistor between VCP & VM

    Jade Han
    Jade Han
    TI Thinks Resolved
    Part Number: DRV8840 Tool/software: Hello team, From below example circuit from datasheet, may I ask: 1. What is the role of the 1Mohm resistor between VCP and VM? 2. Is this resistor absolutely neccessary, or could we design circuit without this 1Mohm…
    • 3 months ago
    • Motor drivers
    • Motor drivers forum
  • DRV8840: What would be the correct setup for filtering output peaks in BDC motor drive?

    Joonas Hollo
    Joonas Hollo
    Part Number: DRV8840 Tool/software: Hi, We have found out that applying some capacitance to DRV8840 Out parallel to BDC motor makes startup peaks lower. However sometimes we still encounter nFAULT to activate. In current design we cannot nRESET the DRV…
    • 5 months ago
    • Motor drivers
    • Motor drivers forum
  • DRV8840: Current regulation does not work

    Tony Bauer
    Tony Bauer
    Part Number: DRV8840 Tool/software: Hi Forum, i've used the DRV8840 in a recent design and cannot get it to work. I've tested two different boards, both were manufactured by a professional company so soldering is not an issue. I've used two…
    • 7 months ago
    • Motor drivers
    • Motor drivers forum
  • RE: DRV8840: FAULT bit occurs right after motor is running

    Murugavel4637
    Murugavel4637
    Hi Joonas, Joonas Hollo said: Just to note that I was using one (1) Ohm not 10 Ohms in first current measurements. Sorry about my oversight with this. Joonas Hollo said: Overall, I think that this OVP might be the case we are facing. So need to consider…
    • 7 months ago
    • Motor drivers
    • Motor drivers forum
  • DRV8840: OCP time tolarence

    Joyce Gao
    Joyce Gao
    TI Thinks Resolved
    Part Number: DRV8840 Hi expert, How long is DRV8840 OCP time described in datasheet? I didn't find such spec in datasheet. In another thread: (+) DRV8840: maximum OCP current and OCP decision timing - Motor drivers forum - Motor drivers - TI E2E support…
    • over 1 year ago
    • Motor drivers
    • Motor drivers forum
  • Answered
  • DRV8840: DRV8840 Has No Output

    oguzhan altun
    oguzhan altun
    Resolved
    Part Number: DRV8840 Hi I use DRV8840PWP on my design. But i have no voltage at the output. You can see my sch below. - I see 3v3 correctly at the nSleep, nReset, Phase and Enable pins. ( As i apply ) - I se 3v3 correctly at the V3P3OUT. - I see about…
    • Resolved
    • over 2 years ago
    • Motor drivers
    • Motor drivers forum
  • DRV8840: OCP doesn’t work at the condition of 6A and 8ms

    Shinichi Inoue
    Shinichi Inoue
    Part Number: DRV8840 Dear Specialists, My customer is encountering the same situation. I would be grateful if you could advise. --- According to the related thread, the conditions for an overcurrent event are commented as current >6A 3.75us±30%.…
    • over 1 year ago
    • Motor drivers
    • Motor drivers forum
  • DRV8840: volt ampere characteristic curve

    kevin.huang_FJXM
    kevin.huang_FJXM
    TI Thinks Resolved
    Part Number: DRV8840 HI Teams: What equipment and fixtures are required for testing the volt ampere characteristic curve of DRV8840?
    • over 2 years ago
    • Motor drivers
    • Motor drivers forum
  • Answered
  • DRV8840: DRV8840PWP Current Control

    oguzhan altun
    oguzhan altun
    Resolved
    Part Number: DRV8840 Hello I want to use DRV8840PWP on my project. However i do not want to use Current set inputs pins of DRV8840PWP. ( I0-I1-I2-I3-I4 / 23-24-25-26-27 ). I will not use current regulation. So i tied ISENSE pin to GND and VREF pin to V3P3. …
    • Resolved
    • over 2 years ago
    • Motor drivers
    • Motor drivers forum
  • Answered
  • DRV8840: The State of nFAULT while nRESET is Low

    Shinichi Inoue
    Shinichi Inoue
    Resolved
    Part Number: DRV8840 Dear Specialists, The customer is considering DRV8840 and has questions. I would be grateful if you could advise. • What is the state of nFAULT while nRESET is low? Is it in a high impedance state? • If the error condition persists…
    • Resolved
    • over 2 years ago
    • Motor drivers
    • Motor drivers forum
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