Part Number: DRV8662
Now we are using your DRV8662. The operating frquencies are about 500Hz or less according to your recommendation contdion.
The output voltage is 200V.
I want to operate it at higher frequency, eg. 1KHz.
To tell the truth, I already tiried it and found no problem.
We are going to drivie it not continuously, but at intervals.
Do you have any experiences or opitinos about it?
But in this case internal body diodes will be in reverse bias so how charge pump can be shorted to ground ?
S.M.,
I just asked my colleague and the CCS/motorware does not support switched reluctance motors. As seen in your post here from March 2019, we do not currently support them.
Regards,
-Adam
Part Number: BOOSTXL-DRV8301
Dear sir,
REcently I got the LAunch pad and BoostXL DRV8301. I have to drive SRM Motor. But there was no communication between Launch pad and Boostxl chip.
Except what pwm generated at the microcontroller pins, we could literally understand anything.What is the way out? How to troubleshoot wheteher the board is working?
Fault LED is glowing.
But , nothing i could understand.Is there any troubleshooting manual to understand the Boot xl drv 8301?
Is it mandatory to make SPI working. The biggest problem is the eexample program given in CCs for PM sensor less is all the more confusing and not working. There are two flags which never gets set also
Can you send any sample code to concentrate its function alone without using SPI ?
We are not able to concentrate on our actual problem than concentrating and wasting time.
Please throw some light
thanking you
Warm regards,
S.M.Sundari
Hi Nagasawa-san,
The user.h file contains definitions for multiple motors. Are you correctly selecting which motor definition you're using when compiling? Above where the "USER_MOTOR_xx" parameters are all listed, there are a number of lines that look like
#define USER_MOTOR motor_model_number
All but one of these lines will be commented out. Can you check and make sure the un-commented motor model is the same motor model that you are changing the max current setting for?
Thanks,
Garrett
Part Number: DRV8305-Q1EVM
Dear support team
I want to change USER_MOTOR_MAX_CURRENT of Lab02b project.
So I changed USER_MOTOR_MAX_CURRENT in user.h file , rebuild project and load .out file.
But motor max current is not changed in GUI and max speed is not decreased.
Please help about it.
Regards
Tomohiro Nagasawa
Onkar,
The VGS clamp will conduct the charge pump voltage out to the SHx node if the SHx node is shorted to GND and damage the internal charge pump components.
As designed, if the VGS clamp sees more than ~16V, it will break down and conduct to save the external FET from damage. Since the SHx node would be at 10V and the VCP at 20V usually, when the SHx node is shorted to GND, the VGS clamp sees 20V differentially and will conduct.
Regards,
-Adam
Part Number: DRV8306
I'm using DRV8306 in my motor control application. I am facing issue during measurement of voltage across inline sense resistor. When I connect the reference terminal of probe to switch node, charge pump fails and driver enters into fault mode.This results into permanent failure of charge pump and no further switching observed at CPL and CPH pins after this incident. I am interested to know reason behind this.
Hi, Pengfei,
Please take a look at my answers below and let me know if you have additional questions or comments.
1.- Yes, the double resonance frequency can be supported by the DRV2605. However, it must be configured manually in open-loop mode. The closed-loop mode will try to sense the correct resonant frequency and there could be risk to select 160Hz or 320Hz. In open-loop mode, the frequency is configured by the user. We have a guide document that could help to configure the DRV2605 manually:
http://www.ti.com/general/docs/lit/getliterature.tsp?baseLiteratureNumber=slor114&fileType=zip
2.- There's around 120 effects that can be used individually or in sequence. The DRV2605 library offers the capability to handle each effect as the user requires. We don't have a document that explains each of all these effects. However, the DRV2605EVM and the Haptics Control Console can be used for analysis purposes. The Control Console can be easily used to configure each effect on the board.
3.- I'm not familiarized with the PWM vibration waveforms, but we can provide the DRV2603EVM-CT Source Codes. The integrated MSP430xx microcontroller features a PWM output which is used for these purposes. All the .h and .c files are located in this link:
http://www.ti.com/general/docs/lit/getliterature.tsp?baseLiteratureNumber=sloc268&fileType=zip
4.- Could we check this question via email or E2E chat?
Best regards,
Luis Fernando Rodríguez S.
Part Number: DRV2605
Hi Guys
Our customer wants to use our DRV2605, there are a few of questions below:
1. The motor used by the customer is a dual axis instead of a single axis. Can we support the vibration effect of the double resonant frequency(160Hz and 320Hz)? Mainly use 160Hz. Is it possible to adjust the resonance frequency to 160 Hz by calibration; How to perform this type of calibration?
2. Can our 123 vibration effects be customized? I mean we want to produce a variety of different effects If so, is there any relevant documentation explaining our special effects?
3. If we use DRV2603, can we provide customers with a DRV2603-based program or firmware to generate PWM vibration waveforms?
4. In addition to the handheld device application, is there an application for our product in the gamepad? What brand of handle?
Thanks. Your feedback are very appreciated.
-Pengfei
Hi Jukka,
The jitter at the output comes as result of the input 230 kHz PWM signal and the internal synchronizers. The IC is not designed to operate above 200kHz. The DRV8870 will not be a suitable fit for your application for this reason. I will move this thread to the audio amplifier group. They will be able to further assist you.
Part Number: DRV8870
I'm looking for a replacement for other manufacturer's H-bridge motor driver. I found DRV8870 which I though might work in my application (I'm driving a speaker with a PWM signal). I hacked together a prototype and it works, kind of. With a 230 kHz 50% PWM input, I see some strange jitter at the outputs and this sounds like noise on the speaker. The delay from input going high to output going high varies from 700 ns to 800 ns (at least, I checked about 10 rising edges). I know 230 kHz is slightly higher than the recommended maximum PWM frequency of 200 kHz, but this shouldn't cause jitter at the outputs, I think.
VM=12 V, VREF=3.3 V, RSEN=0 ohm. Both outputs go through a 68 uH inductor to an 8 ohm speaker with capacitors to GND from both speaker terminals.
Is DRV8870 "sampling the inputs" at some internal frequency, causing the jitter I'm seeing? If it is, then I'll have to keep looking for a suitable H-bridge.. the noise I hear on the speaker is too loud to be acceptable.
Hi Matsumoto-san,
Yes, there is some tolerance in the OCP circuit. It is very possible the OCP may not assert at 11A.
The OCP fault can assert as low as 10A, but will typically assert at ~13A.
The OCP maximum current could be as high as 16A.
Part Number: DRV8873
Hi all
Would you mind if we ask DRV8873?
The datasheet shows minimum overcurrent protection trip level is 10A.
How much is the typical value and the maximum value?
As the background of this question, on the customer board, in spite of the condtion 11A@20us, it doesn't operate OCP condtion.
So, we assume that the device has some tolerance.
Kind regards,
Hirotaka Matsumoto
Hi Hector,
VIO in specification table shows typ: 10mV and max 10mV. My customer is asking ma if this means VIO will be within -10mV ~ +10mV or 0 ~ 10mV.
Regards,
Nobuhiko Wasa
Part Number: DRV8702-Q1
Hi team,
Looking at the datasheet, VIO is defined as 5mV typical and 10mV at max. Does this max mean absolute value? If so, VIO should be within -10mV ~ +10mV. Otherwise, what is possible VIO range?
Regards,
Nobuhiko Wasa
Mourad,
I have checked your schematic and I do not see any issues. Have you tried a second board or IC?
Regards,
-Adam
Part Number: DRV8302
I’m' working on the development of a BLDC motor driver and I'm using the DRV8302 as a gate driver
this is my sch and brd
Note: R1 to R6 are all shorted
my configuration:
M_PWM 5V
M_OC 0V
GAIN 0V
OC_ADJ 3V
EN_GATE 5V
but it seems that i have a problem:
- GVDD pin output 0V even when EN_GATE is HIGH
- AVDD and DVDD are 680mV
-it does not draw current when i connect it to the power supply, and i am testing it with no load.
there is no fault:
- nFAULT is High
- nOCTW is High
Hi team,
1. After the SPI is written to the register, the motor stops only after 1-minute driving, and the data returned by SDO is a fixed round-back. The customer would like to know what's the reason for that and is there any files for reference.
2. For SPI drive, write registers IC1:0X0445;IC2:0X06EC;IC3:0X0840;IC4:0XC01C Return value: 0X4051;0XC00C;0XC040;The chip no longer outputs after 0X4000. What's the problem?
Could you please help to check this?
Thanks!
Best Regards,
Cherry
In the datasheet 8.3.5.5 it describle"The DRV3245Q-Q1 contains integrated three-phase comparators, each of which monitors the motor phasebbvoltage at the SHx pin against the supply voltage at the VDRAIN pin. Each comparator is switching at 75% and 25%, or 50% of the VDRAIN voltage." I have confused. I want to ask how does the DRV3245CQPHPRQ1 internal module " Phase Comparators " works? Could you provide some relevant examples or calculation design documents for reference?
