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RE: DRV8308 Mysterious Short
I don't know if you'll get anything from a picture of the physical board, especially because I can only take it with a crappy flip phone camera. Here are pictures of the PCB in Altium. The...
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RE: DRV8308 Mysterious Short
I realized while looking at this that my probing was incorrect. I was testing the wrong pins. It seems that pins 5,6 and 1 are all directly connected, which means there is a short through both FETs...
View ArticleRE: DRV8308 Mysterious Short
Hi Jon, Did you check the Pin 1 designator of the IRF7103 package against your silk pin 1 designator? If the MOSFETs were populated incorrectly then the body diode of each MOSFET in the package would...
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RE: DRV8308 Mysterious Short
MOSFET on PCB. Pin 1 designator is definitely matched with silk. All three look the same.
View ArticleRE: DRV8308 Mysterious Short
Hi Jon, Thanks for the image. I would suggest you try removing each MOSFET package and measuring the VCC_MOT and GND resistance. This will allow you to determine if one of the MOSFETs has been damaged....
View ArticleDRV8308 Mysterious Short
Hi,I am using the DRV8308 to control some sensored brushless DC motors. I have followed the application schematic in the datasheet closely. Here is my schematic from my...
View ArticleRE: Problem with (DRV8701 + MOSFET) connected to a DC motor load
Hi Sugandar, Can you confirm the GHx switches from 0 to 9.5V with respect to GND? This should be with respect to the SHx pins. Can you try using a resistor of 100 ohms to 1k instead of the motor? Can...
View ArticleProblem with (DRV8701 + MOSFET) connected to a DC motor load
Dear TI team,I have used your DRV8701E IC to build my DC motor(18V~40V, 10A, 820N) Full bridge control using NXP MOSFET (PSMN014-40YS) .I have used your DRV8701 evaluation board as circuit reference...
View ArticleRE: DRV8818 Ichop
Hi Wilson, It is possible to change the full scale current at only STEP ANGLE as 45degree and 225degree. Is this correct and just design? The customer wants to know that. Regards, Naoki Aoyama
View ArticleDRV8818 Ichop
Hello,Our customer uses the DRV8818, with half step mode.The customer wants to control the current of the motor while keep some state.So, they change the value of the VREF voltage while keep some...
View ArticleRE: DRV8711EVM Schematic
Hi BobWe use Altium to do the EVM design. You can find all the hardware source files in the EVM page.Best regards,
View ArticleDRV8711EVM Schematic
Please could you advise the drawing package used to draw the schematics for the EVM, is it Eagle?Thanks
View ArticleRE: InstaSPINT Motor Control Solutions for BLDC Halbach electric motor -...
Hi Murat, Are there any specifications provided with the motor? What is the motor voltage and current? Did the customer provide any information regarding controlling the motor?
View ArticleRE: driver a 5 coil micromotor ( that have coil in a delta mode )
Hi Giovanni, The images did not appear. Can you resend the images of the motor?
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driver a 5 coil micromotor ( that have coil in a delta mode )
Hello.for my nephew who has a micro drone quad,as well as repair she asked me to improve it.The average life of a brush motor is really short.He does not want another toy, he wants to improve what he...
View ArticleRE: InstaSPINT Motor Control Solutions for BLDC Halbach electric motor -...
Hi Rick, the motor can be operated at a maximum current of 13 Amperes and needs a voltage supply between 4.4V to 45V. The customer and also the TI support team told me that the motor could be...
View ArticleInstaSPINT Motor Control Solutions for BLDC Halbach electric motor - Service...
Dear Ladies and Gentleman,The electric motor, a customer gave us, looks like the motor in the patent US 7,598,646 B2 (www.google.ch/.../US7598646)and comprises the following parts:a) a first...
View ArticleRE: DRV8881E / nFAULT
Hi Yaita-san, nFAULT pin should be pulled up to mcu VCC (3.3 or 5V typically). You are correct. nFAULT will be Hi-Z when VM continues to drop. There is a point the internal logic cannot control the...
View ArticleRE: motor driver for universal motor
Hi David,Please look HERE and HERE These are good evaluation platforms that can be modified for the customer needs.
View Articlemotor driver for universal motor
Hi,Customer would like to use universal motor with DC310V, 500W, 5kg torque, 30rpm~10,000rpm.Do we have proper driver solution? FET as well.Thanks.
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