DRV8870 - the maximum frequency in case of 100% Duty
Hi allWould you mind if we ask DRV8870?The datasheet P4 shows as the follow;If the PWM frequency is 200 kHz, the usable duty cycle range is 16% to 84%.Our customer would like to use 100% Duty.How much...
View ArticleDC_CAL pin and DC_CAL register of SPI in DRV8301
Hi!In the datasheet of DRV8301, section 7.3.2, paragraph 4, it is stated that:"To minimize DC offset and drift overtemperature, a calibration method is provided through either the DC_CAL pinor SPI...
View ArticleBLDC kits
Can anyone suggest an EVM kit for a 12 V BLDC sensorless motor which has very low inductance and 30k RPM?I want to design an application where the fan regains its speed in case I obstruct it from...
View ArticleDRV8711 EVM - Pulls down voltage on power supply from 24V to 7V when I enable...
I am having trouble troubleshooting my DRV8711EVM board. My bench top power supply drops from 24V to 7V as soon as I send the enable signal to the driver over SPI. Iam worried that the DRV8711 IC...
View ArticleWhy can't I access info about DRV91670
I can't seem to access the datasheet for the DRV91670. Do I need to request special access?
View ArticleRamp UP Ramp Down using PWM for DRV8842(TMS320F28075)
Hello,I am working on TMS320F28075 and i am generating a PWM of 7KHz and i am getting analog input signal(0-3.3V) to my ADC channel(12 bit).According to the input signal(ADC) i am varying my PWM from...
View Articledrv8301
what are the necessary thing that i have to do with DRV8301 to run it with default setting correctly.Correctly running means all the pins voltages(AVDD,DVDD,GVDD) are correct and getting output at the...
View ArticleRelay Driver IC ULN2003V12 Failure
Hello ,I have a msp430 based application where 7 Relays are driving 7 contactors which inturn drive loads consisting of several capacitor banks & motor.The coil resistance is about 1200 ohm of...
View ArticleHow to enable direct PWM mode on BOOST-DRV8711 via f28069m piccolo launchpad?
I am unclear how to set the the PWMMODE bit in the OFF register I have read through the user guide and the data sheet for the DRV8711 however I was unable open the firmware supplied in CCSv5 or CCSv6I...
View ArticleDRV10983 Abnormal lock detect current limit error
We are currently developing a 24V 40W motor integrated to DRV10983 based motor driver. We are expressing a strange issue with DR10983 giving lock detection current limit error.We have configured the...
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How to control DRV8332 using PWM_H PWM_L
Hi everyone!What a wonderful day to develope!but I have some problem.We designed motor driver using DRV8332. But I just confuse how to connect Tiva (TM4C123GH6PM) PWM pin to DRV8332.I've already...
View ArticleCan the output of two 15-amp motor drivers be hooked up in series to achieve...
I had a cheap motor driver that I bought on kynix. You can see product details here.I was planning to use this motor driver to power my robot, which uses two 24v wheelchair motors. Then I connected...
View ArticleHow to detect motor stall using DRV8860 drive stepper
Hi Champs,My customer is using DRV8860 to drive 2 stepper motors in home air-conditioner indoor unit. Recently they have a new requirement of detecting motor stalling, then stop the motor. They want to...
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TIDA-00771 BLDC drive questions
1. What is R11 in the below pic used for? How to determine the value of R11?2. What's R6 and R7 used for? How to determine the value.Thanks.
View ArticleDRV110 some question
Hello,Our customer use the DRV110, have some questions.A) about KEEP pin voltageHow much the maximum voltage of the KEEP pin after reach 100mV?B) about CINIt is recommended 1uF minimum for the CIN.If...
View ArticleDRV8711 Rate for changing the stepper mode
We want to use the DRV8711 in several microstepping modes to drive a motor with 400 steps!I wonder, how often we can change the microstepping mode e.g. from 1/256 to 1/64 in 1 second (or with which...
View Articledrv8301
Is use of current shunt ampilfier is necessary to use DRV8301 in OCP current limit mode?
View ArticleDRV110 accuracy
Hello,Our customer have a question about the accuracy of IPEAK, IHOLD, tKEEP and fPWM.It is mentioned the accuracy of IPEAK and IHOLD on the datasheet. Is it applicable when the customer use the RPEAK...
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DRV8823 SPI motor driver
Dear Sir Do we have other SPI motor driver ??The SPEC is similar with L6474HTR
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DRV8881P About current wavefrom at 1-2 phase
Hi,My customer is using DRV8881PEVM and customer motor. Then, he has a issue.Please see the below picture. This is current waveform.Motor operates at 1-2 phase. Do you know the reason of red circle of...
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