Duty cycle control of a 3-ph BLDC motor
Hello,I'm working on driving a BLDC motor, in a sensorless mode, with the duty cycle of PWM that I will generate from an external device, with its own algorithm of control. I have seen that the...
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drv8308evm clock frequency mode
hi,we are using drv8308evm board with external SPI interface (from STM32F429 controller). SPI communication is working. All control signals like ENB,CLKIN,RST everything is controlled by STM32F429. we...
View ArticleDRV8835 - PWM controlling the DC motor
Hello Team,Please allow me to ask you a simple question. When driving the DC motor with PWM using in IN/IN mode, I believe you should control the motor repeating FORWARD and COAST, am I correct ? Or,...
View ArticleDRV8412 always in brake
Hi, hopefully this is a simple question.We are evaluating the DRV8412 using the evaluation board (DRV8412EVM) for a haptic/robotic application. Currently setting up a torque controller to test the...
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DRV8870 - ramp rate 2V/us
Hello,In the DRV8870 datasheet page 3, there is the rating of Power Supply voltage ramp rate(VM) as 2V/us.Could you please let me know this meaning?Is this rating applied to above 6.5V of VM which is...
View ArticlePower Supply for DRV8305/DRV8305-Q1 and deadtime setting
Hi TI community,I am wondering if it's possible to use the DRV8305 and DRV8305-Q1 in a 48V application by supplying the three-phase inverter with 48V and using something like a simple shunt voltage...
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DRV8805 / continuous output current
Hi Team,The datasheet shows the following about HTSSOP package.Is it possible to output 2A per channel simultaneously when two channels on?Best Regards,Yaita
View ArticleBLDC controller
Hi,I really need some input. We have developed our own BLDC controller cpmpletely based on the schematics for the DRV8301-HC-EVM. Now there is a problem that OCTW asserts low as soon as the DRV8301 is...
View ArticleLMD18200 for supply Ultrasonic Transducer with AC (30W)
Hello,I am trying to supply Ultrasonic Transducer with AC (30W) through a DC power equipment. To convert the DC to AC I will try to use the LMD18200:The input will be an oscillating signal send to the...
View ArticleDRV8301-HC-C2-KIT SPI interface wiring
Hello everyone,My question concerns the user SPI (J8 header). I would like to know which kind of wires I can use to link to these pins ? Can I use a connector ? If yes, which connector I can use ?Thank...
View ArticleDRV8711 write issue after sleep
I want to share this issue that I recently discovered on DRV8711:if during sleep (SLEEPn forced L) the SPI is used to write 3 or more registers, then after resuming from sleep the first write access is...
View ArticleUse DRV8835 for brushless motor control Y connected A, B, C windings?
I want to drive a brushless DC motor that has Y connected windings, i.e. three phase, call the pins A, B, and C, each pin to a coil with the other legs of each coil all tied together inside the motor....
View Articleproblem phase C use drv 8332
Hi for everyonewhen i used drv8332 I used PWM 40% in phase C , PVDD =24V, but in ,Reset C= 1 and PWMC=0 OUT C = Vgnd->true,but reset c=1 PWMC=1 OUT C =11 V ?? So why I use Pvdd=24V ->OUTC=11V ,...
View ArticleDRV8312 Bulk Capacitance and Over Current Adjust
Customer is considering moving from an ST motor controller to DRV8312. They have the evaluation board controlling their motor.Questions:1. Bulk capacitance. The data sheet does not provide specific...
View ArticleCan I run multiple identical DRV8825 setups in parallel?
I need to run a 6A stepper motor off of a chopper drive. However, I have easy access to your DRV8825 motor drivers on identical breakout boards, and am wondering if I could just use 3 of those in...
View ArticleDRV10975 included Step-down regulator
Hi there,if I don't use the included step-down regulator of the DRV10975 driver, should I let the leave the pins VREG, SW and SWGND floating? Or which minimum wiring would you recommend?Thanks for...
View ArticleDRV8871 Current regulation accuracy
Hi,Could you please tell me how DRV8871 sense motor current for current regulation? I think that it is as overcurrent protection. In other words, It shows DRV8871 senses FET ds voltage.Customer wants...
View Articleregarding the drv8829 EVM issues
Hi,I am working on DRV8829 EVM board getting some issues, In order to check the behavior of the stepper motor I have developed a prototype as DRV8829 EVM.Issues are:* When we power on the supply for...
View ArticleDRV8812 Logic input terminal
Hello,Our customer uses the DRV8812, has a question.Is there a internal pullup/pulldown resistor at the logic input terminal?Regards,Naoki Aoyama
View ArticleHow to drive 6 or more servo motor ?
Hello Friends,I use the TI MSP430G2553 launchpad.I have to drive 6 or more servo motor.I search about it and i found this code. Also I use IAR Embedded Software.#include "msp430g2553.h" // make sure...
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