DRV 8432 parallel mode malfunction
I am using the drv 8432 in the parallel mode. I am NOT driving a motor but an inductive coil (L=470 uH and R = 0.4 ohm). I am using this IC to apply a specific voltage pattern to the coil and recycle...
View ArticleDRV8711Evaluation Module - included stepper motor
Hi, I have ordered a DRV8711 evaluation module. Can someone please provide me with a specification of the 'included stepper motor'?
View ArticleDRV8301-RM48-KIT Low Speed Running Problem
I am using the 8301-RM48 motor kit.When I run Project "RM48L952_foc_encoder_speed" for speed control of the motor.When I set the reference speed to be "0.05", which is "172rpm", the motor is still...
View ArticleImplementing DRV8313
Hi All,I'm Developing a product to drive the BLDC Fan using DRV8313. I bought DRV8313EVM and been exploring it for a while. i want to realize it on the product, but I've got some queries before i do...
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PMSM rotor position estimation with Sliding mode observer
In ti application document,they use Sliding mode current observer to estimate rotor position.Sliding Mode Current Observer equations as follow Z=k*sign()Then the document says that"Estimated back emf...
View ArticleVREF goes low 200 mV without motor connections
We are have problem with drv8432 VREF goes low without any motion or motor connectionWe replace a digital [pot and we put AGND a 64.9K resistor , also we added a 4.3K pull down resistor to RESET_AB and...
View ArticleImportance of RESET pins of DRV8432
Hello. I designed a driver board with the IC DRV8432 to run a stepper motor. Can anyone please explain to me the use of the pins RESET_AB & RESET_CD?I designed a board without using these pins....
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12V to 42V power boast converter.
Hello, I am looking to design a control system to automate a material testing rig (see below). ...A motor will be attached to the screw on the right side of the machine, and turn to fatigue the sample...
View ArticleIssue with QPOSMAX setting in F2803XQEP.H
Hi,I've been working on a project spinning a custom PMSM using FOC at low rpm using an quadrature incremental encoder to give electrical theta and velocity information.To cut a long story short, I was...
View ArticleNEMA17 BLDC/PMSM 55W Motor
• Hello everyone, I will buy a kit ( DRV8312-69M-KIT), but first I would like to know more about the motor which is included on it (1 NEMA17 BLDC/PMSM 55W Motor). Can I choose between BLDC and PMSM?• I...
View ArticleUsing TMDSHVMTRPFCKIT as a grid connected inverter
Dear all, We need a three-phase grid connected inverter controlled with one of TI C2000 MCUs, preferably F28335. I found the three-phase motor drive Developer's Kit TMDSHVMTRPFCKIT which we can use as...
View ArticleDRV8801 nFault when Motor start
Hi!I meet a strange problem about DRV8801. When I apply PWM signal (20kHZ, 50% duty cycle) to the Enable pin of DRV8801, the nFault pin keeps outputing a periodic waveform (about 600Hz, with only 30us...
View Articledrv8301 current sense amplifiers
Hi,in all applications I saw the current sense resistor is connected to SNx and SPx is connected to gnd.Is there any problem to connect the resistor to SPx and SNx to GND?Is the amplifier input stage a...
View ArticleDRV8811 Spec change question
I noticed that Revision H of the DRV881 data sheet changed the Digital pin voltage range absolute maximum voltage from Vcc (Data sheet revision G) to 7 volts. Does this mean that I can safely run the...
View ArticleDRV8823 Current ratings total or per H-Bridge?
Hello, looking through the datasheet of the DRV8823 / DRV8823-Q1, I couldn't find any information on weather the 1.8A current rating is per H-Bridge or total for the chip? I basically need to drive 2...
View ArticleDRV8301 Bootstrap Capacitor Sizing
Hi, the DRV8301 datasheet specifies that the bootstrap caps be sized at 0.1uF. However, I am driving five FETs per phase leg (30 in total), which means a larger total gate charge - about 250nC. In the...
View ArticleDRV8302 3D STEP model needed
Does anyone have a 3D STEP file of the DRV8302 part that includes the heat sink pad?
View ArticleDRV8711 Motor voltage
Hello,I have a question regarding DRV8711 predriver for stepper motors. It clearly states that this device operates from 8V, which I guess is due to the fact it needs ~10V for MOSFETs gates.However, I...
View ArticleDRV8301LS12kit - Analog input
Hi,I am Trying to use the Ext-IA-FB and Ext-IB-FB pins 19 and 69 of DIM100 for measuring some analog signals.I removed the R133 and R134 resistance in the DRV kit ( refering schematic drawing RevD of...
View ArticleDRV8844 dead time
Hello,My customer uses the DRV8844.He has some questions about the dead time and switching characteristics.Q1) How about a variation of dead time and deglitch time due to the temperature from -40 to...
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