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DRV8305: Some problem while driving BLDC motor using DRV8305 and MSP430G2553.
Part Number: DRV8305Hello sir,I have used DRV8305 and an MSP430G2553 controller to drive BLDC. It runs almost perfectly but at some point of time BLDC motor internally make a sound for a second and...
View ArticleRE: DRV8305: DRV8305 nFAULT Low
Hi Robert, I'm glad you were able to remove the fault. For the new issue of not being able to toggle the GHC, a have a couple questions: 1.) Does replacing R1008 solve this issue? Are you sure the...
View ArticleRE: DRV8301: DRV8301 PWM not working
Hi Suraj, With no MOSFETs connected, the device will go into "Current Limit Mode" when the gate signals are enabled because the VDS differential is greater than the VDS threshold set with the OC_ADJ...
View ArticleRE: DRV8301: DRV8301 heats up a lot if buck is enabled
Hi Suraj, The inductor must be connected to the buck in order for it to operate correctly. I would recommend disconnecting all external loads from the VCC buck output and checking the following...
View ArticleRE: Looking for driver for a Single Phase Brushless (BLDC) Motor
Hi Josh, The DRV8701 Gate driver would be a good for this application, I would recommend following the reference design suggestion that you posted. This gate driver is best suited for the current level...
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Looking for driver for a Single Phase Brushless (BLDC) Motor
Hello all,I am a design engineer and just starting a new project. I have done some research and it seems that what I am trying to do is quite possible, but probably not the most common. I am working on...
View ArticleRE: How can I terminate floating voltage of PVDD port?
Hi Nam, Sang-il, Sorry for the delay. We were not to duplicate your findings. When GVDD and VDD = 12V, the outputs were measured to be 560mV. PVDD was measured to be 330mV. PVDD is following the OUT_x...
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How can I terminate floating voltage of PVDD port?
Hi,Even above condition, (DRV8332 in reset and PVDD off)the power indicator LED remain on in low brightness.I could observe the floating voltage (almost 2~3V) at point of arrow.How can I terminate...
View ArticleRE: DRV8303: DRV8303 Flow Through Drive of High and Low Side FETs
TI,Do you have an update as to why the DRV8303 (and DRV8301) have this undesired behavior of shoot-though, caused by a narrow pulse out of the low-side gate drive output?
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DRV8303: DRV8303 Flow Through Drive of High and Low Side FETs
Part Number: DRV8303We are using theTMS320F28069MPZT and the DRV8303 and have a problem with the GLx (lower gate output drive) spiking up when there is a transition on the GHx signal (high side gate...
View ArticleRE: Full Bridge Driver for a 100 V DC motor
Hi Daniel,I will look into them.Thanks,Marc
View ArticleRE: DRV8301: DRV8301 heats up a lot if buck is enabled
Hi Phil, Thank you for your answer, I'll try this and report results here. Thank you again!!
View ArticleRE: DRV8301: DRV8301 PWM not working
Hi Phil, Thank you for enlightening me about this mode. I'll try this out and report results here. Thank you again!!
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RE: DRV8305: Some problem while driving BLDC motor using DRV8305 and...
Thank you. Below are some problems which I face while doing experiment with Motor.1. In REVERSE (clockwise) direction It works fine (Very less amount of jerk in a motor) but when I load motor through...
View ArticleRE: DRV8432: Vreg=0.48v
Hi Mak, With the inputs configured as stated, the outputs should be disabled. Have you measured resistances between PVDD, GVDD, VDD, VREG, BST_x and GND? Is it possible to slowly raise the voltage on...
View ArticleDRV8432: Vreg=0.48v
Part Number: DRV8432I am using DRV8432 first time for a motor control application.Gvdd=vdd=12v,Pvdd=12v.I am working in 1PFB mode.M0=0,M1=Vreg,M3=0.RESET_CD=0v.Reset_AB=NC.PWM_B and PWM_B=0.After power...
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RE: DRV8305: Some problem while driving BLDC motor using DRV8305 and...
Hi Dinesh,It is difficult to determine what is occurring without the hall inputs and the other phase.Please focus on the circled area if possible. It appears there may be a missing commutation...
View ArticleRE: DRV8303: DRV8303 Flow Through Drive of High and Low Side FETs
Hi Steve, I apologize for the delay in response and appreciate your patience. 1.) Have you tried increasing the DTC resistor value in your design? I saw that you said you've tried increasing deadtime,...
View ArticleRE: DRV8303: DRV8303 Flow Through Drive of High and Low Side FETs
Phil,1) The DTC resistor (pin 3) is the value that I increased. As it was increased, the flow through spike moved with the increased time.2) I tried pull down resistors down to 250 ohms, with no...
View ArticleRE: BOOSTXL-ULN2003: Selection of BoosterPack and LaunchPad for Stepper Motor
Hello Andres,Unfortunately, I don't believe that either of the boosterpacks that you mentioned will work for your application.The BOOSTXL-ULN2003 is meant for simple, relatively low current (500mA max)...
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