DRV8432 output state in CBC mode?
Hello, I chose to use the DRV8432 for driving a couple BDC motors with an H-bridge configuration. I have it set up that for each motor, one side of the bridge is always set low while the opposite side...
View ArticleDRV8837 over aggressive OCP?
I am using a DRV8837 with this DC gearmotor. There are some problems with this and I think this might be related to the OCP.I have tried various different ways of driving the DRV8837, for example...
View ArticleDRV8412 help
Hello, I'm disty of Japan area.Please help me.Please tell me about <DRV8312DDWR/DRV8332DKD/DRV8412DDWR>If it becomes the case of the following,Will IC fail? No problem?Before power supply voltage...
View ArticleDRV 8824 Decay input port fault
Hello,Have a weird problem and I can not find the cause.We use a drv8824 with pin 19 (decay) loose so it's in mix mode. It's already happened a few times that the decay input is faulty. The driver is...
View ArticleNeed DRV8811 Basic Help
I have been experimenting with the DRV8811 EVM board driving a Applied Motion HT17-275 Stepper Motor. I am looking for guidance on how to get the maximum torque out of the stepper motor. Right now, I...
View ArticleReplacement recommendation of A4953(Allegro)
Hi~Our customer will use A4953(Allegro motor driver).Application is Robot Cleaner.Our customer want TI Replacement information.Can you recommend TI replacement device?We attached A4953 datasheet.Please...
View ArticleAbout Vref accuracy of DRV8840
The 5-th page of the datasheet of DRV8840 has the following statements."Operational at VREF between 0 V and 1 V, but accuracy is degraded"Please teach me why the accuracy of Vref degrade.Moreover, is...
View ArticleACI Motor Control Graph view
Dear Friend,I'm trying to rotate the AC Induction Motor with code imported from Control-suit.Everything is done except for the graph in CCS.Can anyone suggest me the properties of the graph: Start...
View ArticleDRV8301: OC @ no load
Hello,We found out that skipping the motor driver's load (resistance or DC motor) from the output leads to driver OVER-CURRENT state.It looks like the driver needs a minimum load.Is this a known...
View Articledrv8823 read isense
hi, i tried to read the opamp-amplified isense Signal of a drv8823 with an mcu in order to detect stepper blocking. my oscilloscope Shows me this isnt working, because of the 50khz chopping algorithm...
View ArticleDRV8814. Measuring motor current
Hi.I am trying to measure the current trough a brushed dc-motor in order to calculate the torque of the motor.I am using DRV8814 driver with 0.235 Ohm sense-resistor attatched from ISENSE to GND. VREF...
View ArticleDRV8837 Questions
I have a customer interested in the DRV8837 and he has the following questions:Is there any startup time requirement when you take the device out of SLEEP mode (i.e. must you wait a certain length of...
View ArticleDRV8811 Questions--new user
I have been experimenting with the DRV8811 EVM board driving a Applied Motion HT17-275 Stepper Motor. I am looking for guidance on how to get the maximum torque out of the stepper motor. Right now, I...
View ArticleSpeed measurement computation
Hello everyone, I'm using a TMS320 microcontroller, with a PMSM motor, using a FOC control with TI functions. Sometimes, when my motor is at the beginning of movement, the system is a little bit...
View ArticleChoosing FETs for DRV8711
Hello,I'm designing a controller board for stepper motors using DRV8711 pre-driver and I'm trying fo find the cheapest way.The controlled motors are small, consuming about 1A at 12V, so I don't need a...
View ArticleBulk Caps on the DRV8412 GVDD/VDD Pins
Hello,I have a query related to the VDD/GVDD pins on the DRV8412 motor controller. I have a 47uF as well as a 100n decoupling cap by the VDD pin. I'm also using 4x 1uF caps by each of the GVDD pins....
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DC Brushed Motor Drivers components
Hi,Iam finding the DC Brushed motor drivers. here is my requirements,1.> I need to control 24 DC brushed DC motors, is there any technique or any Driver which can handle 24 motors.2.>I need to...
View ArticleDRV8301 current limit
I need some help understanding the best way to implement current limiting with the DRV8301 or DRV8302. I need to resolve a plan tomorrow, if possible.From the DRV8301 EVM, it appears that TI's...
View ArticleDRV8834 cad file
I'm looking all over for a drv8834 .bxl file. Does anybody know where I can find it?If the file is not available, does anyone know the process or a good tutorial for creating a schematic file to be...
View ArticleDRV8432 dead time between PWMH and PWML
We are using for signals to control DRV8432 from a DSPPWMH1 to PWM_APWML1 to PWM_BPWMH2 to PWM_CPWML2 to PWM_DTo prevent current shoot-through, some amount of time must be provided between the...
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