Product selection: BLDC motor driver with and without Hall sensors
I have a prototype of a small BLDC motor, and I'm looking for a driver evaluation kit to get it up and running. The current will be less than 3A, the torque very low, probably less than 0.1 N m. I'm...
View ArticleSetting t_(SAMPLE_TIME) in DRV2605 for haptics/LRA application
We are using the DRV2605 in RTP (8 bits unsigned), closed-loop mode unidirectional, to drive LRAs. This is the first time that we are using the DRV2605. The datasheet is quite extensive and clear,...
View ArticleClik here to view.
drv8308 lock abnormal
I did an experiment with the DRV8308 EVM and I used the clock frequency mode. The clock frequency is set as 100Hz and the commutation is 180degree sine.But the LOCKn signal becomes active(low shown as...
View ArticleDRV8824 power dissipation
Hello,Please see below request from my customer & advise any feedback/recommendations:We are using the DRV8824. I used app note SLVA504 to calculated the motor power dissipated for 25C, 85C and the...
View ArticleClik here to view.
DRV8823 - Motor not moving
Dear experts,I am planning to use a DRV8823 in my project to drive three DC brushed motors and already have problems get it to run on the breadboard.Until now I could not get the motor to drive at...
View ArticleStep sygnals for DRV8711
Greatings! I`m using DRV8711 to control a few stepper motors. My microstep indexer is 16. My stepper motors have 1.8 degrees turn angle. So I need to know if I pass only one pulse to DRV8711 is the...
View ArticleBLDC Motor Back EMF, VM pumping during braking or reversal, capacitor sizing.
Thank for the article "2013/12/13/art-of-stopping-the-motor-vm-pumping" which is most interesting,Is there useful guideline to consider sizing of buffer capacitor to limits voltage.I have 3 phase...
View ArticleClik here to view.
DRV8301 high side switching slowly
Hey,I'm using the DRV8301 in a mtor control application and after a pcb redesign i am experiencing problems with 2 of 3 high side switches.While one pase is switching fine, the other two seem to be...
View ArticleDRV8844 half bridge PWM utilization
Hello,I need to use two PWM bridges to control a solenoid, in order to get the maximum power.I'll use the DRV8844 chip.In the datasheet, it is always shown that OUT1 and OUT2 make one bridge, and OUT3...
View Articlemodelling torque controller PI for PMSM FOC VECTOR CONTROL
GREETINGS.here I have designed on matlab / 2015 vector control (FOC) of PMSM with a speed PI controller and now i would use this speed controller in the torque controller ie instead of having the speed...
View ArticleDRV8301
I wanted to communicate with DRV8301 by using ATMEGA 16 microcontroller. when i send the read command 0x9000 (to read control register 1) the ouput data that i got from SDO pin is 0x0600 but i expected...
View ArticleDRV8313 shoot through
Hello, We’re having a problem with the DRV8313. It looks as if there is shoot through happening.Attached is power point file with 2 screen captures showing the behavior.I can share the schematic with...
View ArticleDRV8303 Transient Less than absolute Minimum Supply Voltage
The AD8303 datasheet lists the absolute minimum Supply Voltage (VPVDD) as -0.300VMy application may expose the input to transients of -0.7V for less than 1ms. Is the -0.300V a steady state...
View ArticleDRV8711 and TMS320F28377S Launchpad- Current Sense Query
Hi,I'm a beginner. I would like to know how current sense can be achieved using DRV8711.It has an internal circuitry that does current sense.Will I be able to read the current sense data through SPI...
View ArticleDRV8701P the data sheet 14PAGE "Table 2. DRV8701P (PWM) Control Interface"
Hi,I have designed a circuit to TI's chips DRV8701PTo control the DRV8701P a microchip seeks to drive the motor. (PWM)DRV8701P the data sheet 14PAGE "Table 2. DRV8701P (PWM) Control Interface"In nSLEEP...
View ArticleDRV10975 tuning: current probe recommendation
The Tuning Guide seems to rely heavily on current measurements. Am I correct in assuming that I really should have a current probe?I bought one for this purpose, but evidently the bandwidth is not...
View ArticleClik here to view.
DRV8301EVM question
Team,I got a request from a customer (email address 1294039604@qq.com) regarding DRV8301EVM: the customer wants to understand the function of SH_A, SL_A, GL_A, SENSE_N1, SENSE_P1. I have copied the...
View ArticleDRV8307 LOCKn active
At what speed is DRV8307 declaring LOCKn signal?Additionally, how long should the speed be constant before the LOCKn signal goes active?There is no mention of these two facts in the DRV8307 datasheet...
View ArticleDRV10983-75 application issue
I have a DRV10983EVM Developer Kit and am having trouble getting the computer software (DRV10983-75) to run. It will open, but none of the menu buttons work in the GUI, and when I click 'run' I...
View ArticleClik here to view.
DRV8885 - VRREF exceeding 1.28V when controlling IFS using a DAC
Hi Team,When controlling chopping current with the DAC (0V to 3.3V), there could be a possibility to apply voltage above VRREF (1.28V). I understand that the device would not properly operate, but,...
View Article