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    Answered

  • RE: DRV8837: Parallel use

    Resolved
    Hi Ryan, Thanks for your reply. Our customers' EE is toothbrush. The space of PCB is limited. They have made their DRV8837EVM and plan to test. Here is their schematic. They use M_PWM1 to control both DRV8837. Will it still have the risk of shoot…
    • Answered

  • DRV8837EVM: DRV8837 PWM problem

    Resolved
    Part Number: DRV8837 IN1 : PWM duty 80%, IN2 : PWM duty 0% / 400hz Why is the IN2 and OUT2 different?? I think the back EMF is a problem... right?
    • Resolved

  • RE: DRV8837: Improper charge-discharge cycle on the load side

    Hi Ryan, With regards to the DRV8837C, I think the Rds has an additional role to play as well. The issue here is not only with the fast rise time but the fast charging of the coil, and I believe, the 8837C does not charge the coil as fast as the 8837…
    • Answered

  • RE: DRV8837: Does it make sense to apply a PWM to the sleep pin?

    Resolved
    Gordon, Please see the following video: https://training.ti.com/motor-interfaces-and-pwm-frequencies Also, in section 7.3 of the datasheet there is a truth table. I would recommend operating the motor in either a drive state (CW or CCW) or a BRAKE state…

  • DRV8837EVM IN1

    Other Parts Discussed in Thread: DRV8837EVM , DRV8837 Connected Launchpad MSP430G2 to DRV8837EVM to test PWM. Current running through IN1 and IN2 when power is applied via USB or 3V to J1. Reproduce: Connect DRV8837EVM IN1 and GND to Launchpad MSP430G2 P1…
    • Answered

  • DRV8837EVM PWM

    Resolved
    Other Parts Discussed in Thread: DRV8837 , DRV8837EVM Working to understand INx PWM interface on DRV8837. 3V to VM and GND. Hooked up Launchpad MSP430G2 P1.6 to DRV8837EVM IN1. Set max PWM frequency to 250 kHz. Shouldn't the motor rotate clockwise? I'm…
    • Resolved

  • RE: CCS/MSP430G2131: usb fet was not connected error

    no i am not using msp fet ,i am tried to to use USB cable to debugging i have only that option. i am using only msp430g2131 board to debugging,not G2553. custom board am not using in this case , i am using DRV8837evm . after connecting the DRV8837evm…

  • RE: DRV8837: Swiching noise in DRV8837 simulation

    Hi Vladislavas, It was confirmed that there is an issue with the spice model that is causing the spikes to appear at the output. Unfortunately, this is a problem that will not be able to be fixed at this moment. If you want to test and evaluate the DRV8837…

  • RE: DRV8837: how brake process work

    ear Pablo, thanks for your reply. from drv8837 datasheet, in brake mode , both input1 and input2 should be high. but in complementary pwm mode ,i think that if input 1 is high, then input 2 should be low, vice versa. if it is this case ,i don't think…

  • RE: DRV8837: motor is blocked, How to solve these problems in the intelligent door lock?

    Hi user, To select the sense resistor, you need to determine a voltage across the sense resistor that, when amplified by a current shunt amplifier, the amplifier's output is acceptable voltage for the receiving ADC of an MCU (e.g. sense resistor sees…

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