DRV8840: DRV8840 Reset timing
Part Number: DRV8840Dears,Could you please let me know the Min time of nRESET low signal to insure reset DRV8840 internal logic? I can't find this data on datasheet. thanks!We need to driving nRESET...
View ArticleRE: DRV8301: DRV8301 Lock-Up Issue
Phil,Thanks for your response!I will let you know if the customer has any further questions.Thanks again.Richard Elmquist
View ArticleRE: DRV8825: Oscillations on Motor driver IC output
Hi Raju,Is the Keysight scope using a math function and the Agilent using no math? This would explain the negative voltage. It does not explain the difference in current.Can you use the same scope...
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DRV8825: Oscillations on Motor driver IC output
Part Number: DRV8825Hi,We are using DRV8825 IC for driving Peristaltic Pump which is having stepper motor. We designed one fixture to simulate the motor with equivalent inductor and resistance.When we...
View ArticleRE: DRV8308: DRV8308
Thank you Phil, In the next revision of the datasheet I think it would be useful to include this graph. The real speed is within SPEEDTH before the graphic shown with FGOUT signal. Is a resolution...
View ArticleRE: DRV8305: Non-Linear PWM-RPM Relation when using High Frequency PWM
Hey Kursad, Appreciate the indepth information, this is helpful in debug. It looks like the linearity of the speed curve in your application improves with a higher IDRIVE setting. Have you tried using...
View ArticleRE: DRV8308: DRV8308
Hi Javier, The LOOPGAIN is the proportional gain at all frequency range that is applied in the INTEGRAL interval. It is not applied with SPEED gain in the PROPORTIONAL interval. You are correct that...
View ArticleRE: DRV8305: RMS Drive Current
Hi Christopher,The equation shown on page 46 is assuming that all 6 MOSFETs could be switching, like in an application using Field Oriented Control to spin a BLDC. This would be the worst-case stress...
View ArticleRE: BOOSTXL-DRV8323RH: Interfacing PWM Input from Arduino/Raspberry Pi
Hi Phil,Thank you for your feedback. Before we attempted external PWM input, we successfully spun the motor using the EVM attached to Launch Pad dev. board and GUI commanding a PWM signal on 6x PWM...
View ArticleRE: DRV777: Need help selecting a driver chip for unipolar 5V stepper
Hi Paul, The DRV777 is a good choice for your application. The outputs can be paralleled, though you will need a second DRV777 to parallel 2 outputs each. If you are only driving one stepper motor with...
View ArticleDRV777: Need help selecting a driver chip for unipolar 5V stepper
Part Number: DRV777Hi,I need to run the 28 BYJ-48 stepper motor in unipolar mode with a supply voltage of 5V. This stepper is usually driven with ULN2003. However, the ULN2003 may not be the most...
View ArticleRE: DRV8305: RMS Drive Current
Hi Phil, I see, I was planning on starting with 6-step trapezoidal control, but I would like the option to move to FOC to spin the BLDC. I noticed on the DRV832X datasheet that the Ivcp is dependent on...
View ArticleDRV8305: RMS Drive Current
Part Number: DRV8305Hi,I was wondering what limits the RMS Drive current of the gate driver to 30mA? The datasheet mentions that the charge pump limits this, but is it a thermal issue on the charge...
View ArticleRE: DRV8871-Q1: EVM Availability
Hi Jared, There is not a DRV8871-Q1 EVM available. You have two choices: 1) Use the DRV8871 EVM as is. The device is a very good indicator of the function of the DRV8871-Q1. 2) Acquire a DRV8871 EVM...
View ArticleRE: DRV8871-Q1: EVM Availability
Hi Rick, Is the only difference between the DRV8871 and DRV8871-Q1 the thermal limits of the device? Or are there other things I need to be aware of that change between the two? Thank you, Jared
View ArticleRE: BOOSTXL-DRV8323RH: Interfacing PWM Input from Arduino/Raspberry Pi
Hey Rasa,To supply an external PWM signal, you'll need to isolate the MSP430F5529 pin from the EVM. IF you do not do this you run the risk of damaging the MSP430 by back-driving this pin while it's...
View ArticleRE: BOOSTXL-DRV8323RH: Interfacing PWM Input from Arduino/Raspberry Pi
Thank you very much for the detailed response, this is extremely helpful!
View ArticleRE: BOOSTXL-DRV8323RH: Interfacing PWM Input from Arduino/Raspberry Pi
I apologize for troubling you again. What are the differences in this process for the BOOSTXL-DRV8323RS (SPI) version?
View ArticleRE: DRV8871-Q1: EVM Availability
Hi Jared, Thermals (both TSD shutdown temp and package) are slightly different. Also the non-Q1 version has: slightly higher UVLO slightly lower sleep current slightly less overcurrent deglitch time
View ArticleDRV8871-Q1: EVM Availability
Part Number: DRV8871-Q1Hi Team,Is there an EVM available for the DRV8871-Q1? Need one urgently if so.If not, what do you recommend to use to showcase the device?Thanks,Jared
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