Hi ,
I would like to know how is the control scheme for the MOTOR or where can i get the block diagram for this refference design.(DRV8353RH)
Thanks
Rohit
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DRV8353Rx-EVM kit Refference design files
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RE: DRV101: DRV101T
None of these work for our existing PCBs. We need the Through Hole version. We will have to redesign the PCBs whish will require all that work plus require re-certification of UL, CSA and CE.
$$$$ Not good!
$$$$ Not good!
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DRV101: DRV101T
Part Number: DRV101
We use the DRV101T (TO-220-7) PWM Driver in three (3) of our instruments. I just discovered it id in the "Life Buy" phase. Is there a direct replacement for this IC in the TO-220 package?
Thank you,
Bruce Blizzard
Engineering Manger
Ted Pella, Inc.
bruce_blizzard@tedpella.com
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RE: DRV8711: Stepper motor make noise and excessive heat.
Hi Haroon,
Please answer my prior questions.
1) What are your register settings? --> (Specifically what is the torque setting)
2) Have you monitored the current through the stepper motor? --> (Please provide a scope capture of the current through one phase of the stepper and the STEP pulse, or the voltage across the sense resistors and the STEP pulse. Zoom out until one full electrical cycle is shown.)
3) What is the sense resistor value used (are all 5 sense resistors populated)?
Questions 1 and 3 help determine if you have the proper current setting for the motor.
If you have the DRV8711EVM, please use it to determine if the operation is the same on both your custom board and the DRV8711EVM. If the operation is different, you can perform A/B comparisons to find the difference.
Please answer my prior questions.
1) What are your register settings? --> (Specifically what is the torque setting)
2) Have you monitored the current through the stepper motor? --> (Please provide a scope capture of the current through one phase of the stepper and the STEP pulse, or the voltage across the sense resistors and the STEP pulse. Zoom out until one full electrical cycle is shown.)
3) What is the sense resistor value used (are all 5 sense resistors populated)?
Questions 1 and 3 help determine if you have the proper current setting for the motor.
If you have the DRV8711EVM, please use it to determine if the operation is the same on both your custom board and the DRV8711EVM. If the operation is different, you can perform A/B comparisons to find the difference.
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DRV8350: DRV8350H
Part Number: DRV8350
Please can you tell me when the 32 pin DRV8350H will be available for production.
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DRV3245Q-Q1: CRC execution
Part Number: DRV3245Q-Q1
Hello all,
I am learning that the DRV3245 can execute Configuration Data CRC, SPI CRC and EEPROM CRC Check. Since the CRC involve executing an algorithm and no CPU is described in the architecture description, I wonder whether the CRC calculation is intended being performed by HW (e.g. logical gates, latches, etc.) or there is some SW component somewhere doing that.
Thanks ahead for any reply.
Regards
-Marco
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DRV8320: Thermal and power dissipation
Part Number: DRV8320
Customer using DRV8320H with 8KHz switching freq, the case temperature of the device is about 70-degree. However, when switching freq is increased up to 50KHz. The case temp goes up to 100degree above, it violating the design temp limit.
1. How to improve it and keep 50KHz?
2. Is there any simulator to calculate the power dissipation of the DRV8320H?
3. Is DRV8320H suited with this application? What other suited device is suggested?
application: 36V DC Bus Screw Driver
Power: 150W,avg
Regards,
Brian
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RE: DRV10970: Extended break mode
Dmitry,
Sorry for the delay in response. I can not come up with an easy solution using DRV10970 to keep the device in brake and keep it awake once the PWM signal is taken to 0.
I assume they are looking for an integrated power stage? Does the solution need to be sinusoidal or is trapezoidal ok?
Thanks,
Brian
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DRV10970: Extended break mode
Part Number: DRV10970
Team,
One of my customers has a mechanism in their system that they’d like to remain locked using the BLDC motor – they were hoping to keep the DRV10970 in Brake Mode (Shorting all Phases to GND)
From what it looks like this Motor driver enters sleep mode after approximately 1.2 ms of PWM hitting 0. They have no control over this timing and would like to know if we have any suggestions to solve this condition or if there're other BLDC motor drivers that don't have this timing scheme.
Regards,
Dmitry
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RE: DRV8816: DRV8816 strange voltage shape of voltage over R SENSE
Hi Wojciech,
It has been some time since we last heard from you. We are assuming you have resolved your issue, and are closing the post.
If you need further assistance, please reply to the post or select "Ask a related question" if the post is locked.
It has been some time since we last heard from you. We are assuming you have resolved your issue, and are closing the post.
If you need further assistance, please reply to the post or select "Ask a related question" if the post is locked.
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DRV8816: DRV8816 strange voltage shape of voltage over R SENSE
Part Number: DRV8816
Hallo!
I am using DRV8816 EVM to test the DRV8816 motordriver IC. I want to use the VPROPI pin to control the current through the motor ( i know that it is not measuring anything during fast and slow decay). I have added a RC filter (6k2 1nF) and disconnected the on-board MCU to use my Synergy s124 for generating PWM (20Khz). The vpropi signal however was far from block shape of the PWM. I wanted to see how much influence the motor has on the signal so i replaced it with a resistor. The measurments can be find on the picture.
upper signal - VPROPI
lower signal - R SENSE
VPROPI cant keep up with the PWM, i blamed the build in opamp but i also measured the voltage across R SENSE and its not a block either. Could someone explain to me what is causing that delay?
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RE: DRV8353RH-EVM: Compatibility with LAUNCHXL-F28379D
Imanol,
Unfortunately the DRV8353RH-EVM is not compatible with the launchpad family. Only the included adapter board is compatible.
This being said, the included MCU breakout board has similar features to a launchpad, is there something you are unable to do using it? We can help.
Regards,
-Adam
Unfortunately the DRV8353RH-EVM is not compatible with the launchpad family. Only the included adapter board is compatible.
This being said, the included MCU breakout board has similar features to a launchpad, is there something you are unable to do using it? We can help.
Regards,
-Adam
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DRV8832: DRV8832 FAULTn output pullup
Part Number: DRV8832
Dear TI Support Team,
is it possible to pull the FAULTn pin to 24V with a 10k pullup resistor?
Best regards,
Wolfgang
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RE: DRV8350: DRV8350H
Kevin,
I am asking my team and will get back to you tomorrow.
Regards,
-Adam
I am asking my team and will get back to you tomorrow.
Regards,
-Adam
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RE: DRV8320: Thermal and power dissipation
Brian,
I am working on this and will get back to you tomorrow.
Regards,
-Adam
I am working on this and will get back to you tomorrow.
Regards,
-Adam
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RE: DRV10970: Extended break mode
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RE: DRV8323R: DRV** + CSD**
Sam,
1. Let me ask about this.
2. Yes that is correct.
3. Rsense should be selected such that the current sense amp can read it and stays within it's operating range. This being said, it does have isolation.
4. The VDS monitoring is an internal feature that cannot be used externally.
5. The DRV8306EVM measures 2.2in by 2.9in. Our newer designs all have their Altium files on TI.com where you can see the full board files including dimensions.
Regards,
-Adam
1. Let me ask about this.
2. Yes that is correct.
3. Rsense should be selected such that the current sense amp can read it and stays within it's operating range. This being said, it does have isolation.
4. The VDS monitoring is an internal feature that cannot be used externally.
5. The DRV8306EVM measures 2.2in by 2.9in. Our newer designs all have their Altium files on TI.com where you can see the full board files including dimensions.
Regards,
-Adam
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RE: DRV11873: Driver is not responding for PWM for 68ms
Onkar,
Thanks for the extra pictures.
How does the current sensor fit into your system? Are you placing a shunt in series with each of the phases and using 3 current sensors?
Thanks,
Brian
Thanks for the extra pictures.
How does the current sensor fit into your system? Are you placing a shunt in series with each of the phases and using 3 current sensors?
Thanks,
Brian
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DRV11873: Driver is not responding for PWM for 68ms
Part Number: DRV11873
Hi,
We have designed current control circuitry for BLDC motor. We are using ' DRV11873 ' in it.Our circuitry senses current (We are using 'lmp8646' current sensor for sensing phase current) from three phases of BLDC motor then rectified output of current sensor is given to the ' BUCK ' controller (TL2575HV - ADJ) and PWM output of buck controller is given to the driver.
Issue Facing in testing :- Driver is not switching for nearly 68ms even if PWM input given to it . which can be seen from inserted scope wave forms.
Blue - PWM input to DRV11873 (50kHz frequency, 98% duty cycle)
Violet - rectified output from current sensor(proportional to the phase current of BLDC
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RE: DRV8323R: DRV** + CSD**
Thanks Adam,
- I will wait for your answer in regard to question 1.
- Can we use CSD88584 + DRV8323 in an arrangement similar to the attached one? Among other reasons....(Please visit the site to view this file)this will allow us to use higher bus voltage
Regards
Sam
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