Large current sense on drv8332
Hello,Im using DRV8332 the datasheet have schematic and written on it max Voltage on current sense is 100mv , but i need to add bigger current sense resistor to get more voltage to my poor adc...
View ArticleRE: Large current sense on drv8332
Hi Ahmed, We still need to following the rules of 100mV of current sense. So you can using external Opamp to scale the voltage. The following hardware can be a good example of doing this....
View ArticleRE: DRV8301: PVDD voltage and DC link voltage
Hi OliverWe recommanded use the same voltage source for PVDD and motor bus. There is Vds sense function need the voltages the same. Also there is MIN requirement for the bus as well as PVDD.Best regards,
View ArticleDRV8301: PVDD voltage and DC link voltage
Hi,I am using the DRV8301-69m-kit. We want to test drives with DC link voltages as small as 2 V. For this reason, we modified the board by supplying the PVDD1-3 by an external voltage source of 16 V.We...
View ArticleDRV11873 and few questions about it
Hello,First of all, I'll write a short description of problem origin. I work and study the same time. I am writing my master thesis at university and I want to use DRV11873 in the thesis to drive BLDC...
View ArticleRE: DRV11873 DIY made eval board and motor driving - PROBLEM
Thank you for answers! 1. I did. It worked again, but with a problem. I used 6.8 kΩ instead of 3.3kΩ resistor and finally got it moving again. Why was taht a problem? The first PCB I made was working...
View ArticleDRV11873 DIY made eval board and motor driving - PROBLEM
Hello,I am working on a project with DRV11873.I made my own DRV11873 board to test the IC.In the movie below you can see 2 soldered boards - it's like the evaluation board of DRV119873, but split into...
View ArticleRE: DRV11873 and few questions about it
Hi Sebastian, Our experts have been notified and should reply soon.
View ArticleRE: DRV8842 nFault Status
Hi Kevin, Thanks for the additional information. When the driver begins switching the TEC it will require a large amount of instantaneous current. Any stray inductance between the power supply and...
View ArticleRE: DRV8301: PVDD voltage and DC link voltage
Dear Wilson, is it possible to disable the Vds sense function? Or would any other hardware modification allow motor bus voltages which are below the PVDD source voltage? If not, can you recommend...
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RE: DRV8842 nFault Status
Hi Phil,Thank you for your valuable information. I have already put a 470uF Bulk capacitance, it helps smooth the circuit. Now I find out if I increase the VREF value from 3.3V to 7V, the output...
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RE: DRV8711 Register 1 Bit 10 Issues
Sorry forgot to add waveform. See attached.I should also add that I've confirmed the SPI write into Bits [11:0] are working all properly in ALL other registers except register 1.
View ArticleRE: DRV8842 nFault Status
Hi,,,i am a new user. As per my experience i am agree with this thing that the OCP on the device has a tblank time associated with it that the driver will ignore the current sense resister voltage....
View ArticleRE: DRV8711 Register 1 Bit 10 Issues
Hi Ernest, We have not seen this behavior before. I will test on our side and get back to you. A couple questions for my debug: 1.) What is the state of SLEEPn during this testing? 2.) What is the VM...
View ArticleRE: DRV8842 nFault Status
Thank you for your information! That makes a lot of sense for the differences between TEC module and Motor.
View ArticleRE: DRV8711 Register 1 Bit 10 Issues
Also, just to confirm, are you able to see changes in bits 8 and 9 between read and write functions? If the device is reset does this register come up as the proper default value?
View ArticleRE: DRV8711 Register 1 Bit 10 Issues
1) Whether SLEEPn=0 or SLEEPn=1 makes no difference, I tested both. 2) Vm=24 V. In regards to the general "is stuff working...", yes it is. This design is fairly far along. We have been running motors...
View ArticleRE: DRV8711 Register 1 Bit 10 Issues
Hi Ernest, It was brought to my attention that this is a documented error on our part. There is currently a change request being processed for the datasheet. The bit is properly written and the back...
View ArticleRE: DRV8711 Register 1 Bit 10 Issues
Great! This should be put in some sort of errata or documentation. I tried scanning the E2E forums but guess I missed that post. Thanks so much huge time saver.
View ArticleDRV8711 Register 1 Bit 10 Issues
Hello TI,We are having an issue with our DRV8711 Register 0x01 Bit 10. This is very bad for us since I'm planning on using the Internal Stall Detect feature. *NOTE: Bit 10, not Bit 11* (I am aware...
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