DRV8870 / IVM, IVM(sleep) at VM=16V
Hello, Could you please let me know the IVM, IVM(sleep) value at VM=16V?Best Regards,Ryuji Asaka
View ArticleRE: [DRV8312] Switching problem with high current pulse
Hi Fitz, Could you give a drawing of your question for us to better understand you problem? Also the COMP minitor should have some filter/blanking structure to remove the switching noise caused by...
View ArticleRE: [DRV8312] Switching problem with high current pulse
Hi Wilson, To quickly discuss, I would describe the problem as: Example: When switching line is A->B, phase C is floating. At the beginning, Va, Vb, Vc = 9.5V (all floating). So If I set RESET_A,...
View ArticleRE: Parametrs SPI communication DRV8308
Hi. I ask CPOL(pulse direction), CPHA(phase) signal SCK. On time diagram datesheet is not understand.
View ArticleParametrs SPI communication DRV8308
Hello. What are parameters SPI communication DRV8308(what is level on SCK without impulse(no communication)?; data is sampled on the leading (first) or trailing (last) edge of SCK?). I developmental...
View ArticleRE: [DRV8312] Switching problem with high current pulse
Hi Fitz, Let me assuming this way. Firstly, switch from A->B, floating C. Non-complementary. So in PWM OFF, the current is retaining through AB low side (Slow decay). Then the next commutation, Ex....
View ArticleRE: DRV8850 VPROPI pin voltage..
Hi Ravi, The voltage of VPROPI is just the Iout/2000*R_VPROPI. If you have 3K resister, when Iout = 2A, the voltage seen should be 3V. Must be < (VCC-1V) But to get the wanted output voltage, you...
View ArticleDRV8850 VPROPI pin voltage..
Hi,We are using DRV6650 in our design for motor drive. As per equation VPROPI resister set as 3K for 2.5 A current. we can get voltage as per theory :I*R/2000, but we cannot get voltage. we get only...
View ArticleRE: [DRV8312] Switching problem with high current pulse
Dear Wilson, Yes, the current pulse is not far 1us. It's the parasitic inductance bouncing. I will try to increase the filter for COMP module then inform you the result later. Thank you for your...
View Article[DRV8312] Switching problem with high current pulse
Dear TI's experts,I'm using DRV8312 to do sensorless BLDC algorithm without TI's library. I met a problem with the switching schematic:When a phase is in Hi-Z stage, at the first times working, its...
View ArticleRE: DRV591 part number
Got it, thanks, Stuart! Let us know if you have any further questions. By the way, have you seen our DRV595? It's a higher current version of DRV591! -d2
View ArticleDRV591 part number
On the datasheet for the DRV591 there are different part numbers listed can you tell what the difference is between DRV591VFP and DRV591VFPG4
View ArticleRE: DRV8840 I0~I4 pin voltage level
Hi Shimizu,I think what you see is normal. The 100k pull down internal are not the only impedance to GND, there are other circuits there. Also the 100k is just a named value.For those Ix pins, they are...
View ArticleRE: General getting-started BLDC driving/control questions
Hi Mike, This sounds like quite a challenge. We will contact our experts for their opinions. In general, the InstaSPIN devices do not operate at 5V. When you say 5V, what is the lowest voltage? What...
View ArticleRE: Importing PCB footprint files into SolidWorks
Hi Rick - thanks for providing this information! I'll review the files to make sure I understand the syntax. If I understood correctly the T04 object was defined in the Gerber file and was used for...
View ArticleRE: DRV8840 I0~I4 pin voltage level
The "other" circuits on I0 and I4 actually are some MUX for test. So what we see is normal.Best regards,
View ArticleDRV8840 I0~I4 pin voltage level
HiMy customer is using DRV8840. He has a question about I0~I4 pin voltage level.Please see the attached file. Customer noticed abnormal voltage level of I0 and I4 pin.I0 pin is pulled up 5V through...
View ArticleRE: Importing PCB footprint files into SolidWorks
Hi Brad, The hole locations was taken from the ThruHolePlated.ncd file. I then used a gerber viewer on the DrillDrawing.gbr file to confirm the locations, plus confirm the hole sizes.
View ArticleRE: Need +/- 2.5% speed regulation with DRV10983 on a fractional motor liquid...
Hi Michel, Our experts have been notified and should reply soon.
View ArticleRE: General getting-started BLDC driving/control questions
Possible with sensorless•RPM, for continuous motion, from very slow speed (how slow is the real discussion) to max motor RPM.•Acceleration/deceleration curves. Additionally Possible with hall...
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