DRV8825 heating up when connected with the motor
Hello allI am designing a stepper motor kit for students using DRV8825. I powered up the trainer kit with 12V, 2A, the datasheet says that the operating current should be 8mA maximum, but i don't think...
View Articlespeed and position measurement using quadrature incremental encoder using eZdsp
how can i use dsp eZdspf28335 to measure speed and position of rotor of PMSM using incremental quadrature encoder that produces ABZ signals ?any resources or references to look in ?also how can i use...
View ArticleDRV8301-HC-C2
Purchased the kit called DRV8301-HC-C2 from Mouser - maybe old stock!I have spent lots of hours trying to figure out what I am doing wrong since I can not get this to work. Have printed lost of...
View ArticleDRV10983
what's the different between DRV10983RWPR and DRV10983ZPWPR ?i mean "RWPR" and "ZRWPR"thank you.
View ArticleDRV8301 SPI I/O Sequence question
Ok, I'm getting unexpected responses from the DRV8301 on our board.I see in the DRV reference manual:"When nSCS is asserted high, any signals at the SCLK and SDI pins are ignored and SDO is forced into...
View ArticleDRV8301 SPI Write seems not to update registers
I seem to be having issues updating the control registers in my DRV8301.First reads on the registers: Status 1=0, Status 2=1, Control 1=0, Control 2=0.I then send the command word 0x1013 to the DRV....
View Articledrv8307: Hall sensor mess
Hello.First, please pardon my noobness, i am very new to motors and hall effect sensors and many things that can seem basic to most. Still learning.I am trying to pilot a motor (salvaged from laser...
View ArticleDRV8307: datasheet mismatch schematics. What for?
Hi.While reading datasheet (april 2014) of DRV8307, i spotted a difference between two schematics and i wondered the reason for that.See diagram 9.2, page 22: S1 on FET is wired to motor phases and S2...
View ArticleDRV8303 3ed current sense
Hi.I see in the evaluation boards that they implement the 3ed current sense with external OPAMPs.Why didn't the 3ed current sense was integrated into the DRV8303?Thank you.David.
View ArticleClik here to view.
DRV8833 shows weird waveform
Hi,I'm using DRV8833 to create waveform likecoil A: __|---|__|---|__|---|__coil B:|---|__|---|__|---|__|---But the result is quite unexpected.It doesn't stay high and low but ticks high for 3 times and...
View ArticleClik here to view.
DRV8711 start noise. Can I control the start point?
I use DRV8711 and I control the stepping motor.I set resistor.So current wave form is good.but I have one problem.If left start point , sound is noise.but right start point, sound is clear. Can I...
View ArticleDRV10983
i need some help with motor driver.1. Do you have any good idea to measure ambient temperature of a IC ? How to calculation the junction temperature when we know ambient temperature? 2. infrared...
View ArticleClik here to view.
BLDC PWM Configuration with DRV8301 High side FET switching vs Low and High...
Has anyone tried to switch both the high and low side FETs in the configuration from page 14 of the DRV8301 datasheet? Did you notice temperature difference? More efficient?
View ArticleDRV11873 DataSheet Qustions
HiDRV11873 4 Questions.1) It's written on Figure1 and 3 of page7 of data seat (SLWS237A) with "100% Duty". Can PWM input be input to Duty 100% ?2) It's revolving to 20000rpm by Duty 100% in...
View Articleconstant current function for DRV8837
Does DRV8837 have constant current function?Please let me know/
View ArticleQuestions of DRV10983
the following questions are the new questions we get from our customer.1. we want to know how to forecast and calculate the junction temperature in actual measurement? A data from results is like this....
View ArticleLatching relay driver
Hi,Can I drive a latching relay coil with 2 inverted outputs of ULN2003V12PWR?
View ArticleDRV11873 startup phase
Team,Can you check what phase is startup phase of DRV11873?W or V or U? or It depends on other factor like motor location?
View ArticleBLDC motor driver selection
Hello,I want to drive this brushless DC motor - http://www.ebay.com/itm/181589976209?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT . Will DRV11873 BLDC motor driver work with it? Or...
View ArticleDRV8850 eagle lib
Hi,I am using Eagle to create a design with the DRV8850. I haven't managed to find any Eagle library for the DRV8850, is there such a library freely available? If not, I will make this component in...
View Article