RE: Need help on DRV8711
Hi Rick, Reset is low Sleep is high I used 12V power and there's 0 current. I put a breakpoint after enable and used oscilloscope, the writing outputs are correct, I set register 0 in the beginning and...
View ArticleRE: Need help on DRV8711
Hi Esme, Have you tried reading a register to confirm the bits are changing? What are the voltages on VINT, V5, and VCP? Can you send your schematic?
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Need help on DRV8711
Hi,I'm trying to use Infineon XMC4500 F100K1024 to drive DRV8711, but it won't start.This is what I saw on oscilloscope after I wrote 0000 1001 0110 to register 0x3h(I also sent commands to other...
View ArticleRE: DRV8844 "backward powered" problem
Hi Riccardo, Thank you for the additional information. I thought I had seen something similar yesterday, but had not been able to narrow down what I had done. I am in contact with the designer to get...
View ArticleRE: DRV8711 RDIR
Hello,Could you clarify whether the DRV8711 can cause the asymmetry? I already wrote about several reasons why the asymmetry cannot be explained by the motor completely. We observe that already after...
View ArticleRE: Need help on DRV8711
Yes, the bits are changing. VINT is 2.55V, V5 is 5.75V, VCP is 23V
View ArticleRE: Need help on DRV8711
I constructed the circuits as indicated www.ti.com/.../slvu967.pdf I didn't connect the 3.3V,pot, nSTALL, nFAULT, BIN1 and BIN2 to anything though Also I connected SCS pin to GPIO, so I can manually...
View ArticleRE: DRV10983 BLDC Motor Driver
Hi Binoy,DRV10983 needs to be tuned (different register setting needs configuration) to work with different motors. There is tuning guide and GUI available to help tune parametersGUI is under software...
View ArticleDRV10983 BLDC Motor Driver
HiI am using TI BLDC Celing Fan board. http://www.ti.com/tool/TIDA-00386Motor is not rotating in my case. Is there any configuration is required through I2C for analog speed controlling?. please give...
View ArticleRE: False Readings of LM628
Thanks Rick. I'd like to add something else. I've just done another experiment. I fed one of an experimental rotary incremental encoder lines (A or B signal) to the LM628. Then I connected the other...
View ArticleFalse Readings of LM628
Hello Everyone,I use the LM628 as a counter to read pulses from incremental quadrature encoders. Then it sends the value of the instantaneous position to an HC11 to close a position control loop. The...
View ArticleRE: Need help on DRV8711
Hi Esme, Thanks for the confirmation of bits changing and the voltages. There are a few more items to check. Please disconnect the motor, and enable the device using the ENBL in register 0. Do not...
View ArticleRE: DRV 10983 EVM
Jayant,Can you turn off the close loop current limit and see whether duty cycle limiting around 40% goes away?I saw that you already have disabled the mechanical AVS, pleas leave it turned off while...
View ArticleDRV 10983 EVM
This is for Mr. Milan Rajane.I have used the EVM and am not able to write on to EEPROM. Upon clicking of eeWrite message displayed is " make sure power supply is higher than 22V" even though it is...
View ArticleRE: DRV8821 voltage rise time
Hi Reuben, Can you provide a scope capture of the DRV8821 V3P3 during power up?
View ArticleDRV8821 voltage rise time
Hi Champs,I need to clarify for a customer if there is a specified supply voltage rise-time for the DRV8821.They have problems on the field and found the DRV8821 in a lock up state. After they...
View ArticleDRV8844 "backward powered" problem
Hello. I need help about a strange problem I'm facing with the DRV8844.In some applications is possible that the controlled DC motor gets mechanically turned, while power is not supplied to the control...
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