RE: DRV8814 fails when enabled
Hi Rune, The DRV8840 mentioned in the post you found may be a better choice for parallel mode than the DRV8842. This has the same PH/EN interface as well as the same decay modes. Sorry for the confusion.
View ArticleRE: DRV104PWPR THERMAL ANALYS
Hi John,It was my pleasure to assist you.Regards, ThomasPA - Linear Applications Engineering
View ArticleRE: DRV8814 fails when enabled
No problem, thanks for the prompt replies. I was just hoping that I had made an obvious design-flaw somewhere that I could correct. I will switch to the DRV8840.
View ArticleClik here to view.
DRV8814 fails when enabled
Hi TI.I have made a prototype board with the DRV8814 with the purpose of driving a high-frequency resistive circuit (a circuit that requires a >80kHz bipolar square wave input, +/-36V, 1.5A). I have...
View ArticleRE: DRV8811E 1/2 step operation
Hi Noda, Yes. For DRV8881E, we need PH and EN together to control the current ON/OFF and direction. Usually we use EN low for the 0% Iout. TRQ is more likely used for changing the current level and...
View ArticleDRV8811E 1/2 step operation
HelloI have question about 1/2 step operation of DRV8881P.Fig25 of DRV8881 datasheet mentions 1/2 step operation of DRV8881P.How about DRV8881E?I worry how to setting about the state of 0% Iout. (EN?...
View ArticleRE: DVR8301 SPI NOISE
Hi Nick thank you very much for your reply , i will try to check it again . if you say there not supposed to be a problem , i assume i am doing something wrong. by the way , what do you mean by -...
View ArticleDVR8301 SPI NOISE
Hii am using the dvr8301 to drive bldc motor (pwm frequency is 20khz)i think that the spi communication is making the motor little bit more shaky(i am working with very low rpm so i thinks its more...
View ArticleRE: DRV8842 Resoldered 100Hz output
Hi Igor, What output is this? What is the VM voltage? What is the state of the input pins? Are you sure the powerpad is connected? The device should not transition to -9V, so this is confusing.
View ArticleRE: DRV8842 Resoldered 100Hz output
Hello Rick, this is the motor output. The motor voltage is 24V, and the Input pins are both Low. I am not sure the powerpad is connected, because i cannot measure it. But i am quite confident that it...
View ArticleClik here to view.
DRV8842 Resoldered 100Hz output
Hello Team!I made a wrong connection to the DRV8842 IC and blew it up, so I wanted to replace it manually. I Dissoldered the broken chip with a hot air soldering tool, which was complicated because of...
View ArticleRE: Intefacing EK-TM4C123GXL with DRV8305 Evaluation Board
Hi Guarav,Can you provide some waveform captures of the motor outputs?Do you see any activity at all?This will help narrow down if the driver is not properly configured or we have an issue with the...
View ArticleIntefacing EK-TM4C123GXL with DRV8305 Evaluation Board
We are facing some issues while interfacing DRV8305 with EK-TM4C123GXL board.We have interfaced this with SPI on EK-TM4C123GXL board with single PWM operation mode of DRV8305. but we are not getting...
View ArticleRE: DVR8301 SPI NOISE
Mark,My statement is that I see and have not seen any reason the SPI bus would interfere with the gate drive outputs.The only item I could think of is if the SPI bus was changing the PWM_MODE setting...
View ArticleRE: DRV8301 supply current versus transistor total charge
Since PVDD2 supplies the buck regulator, is there any 3.3V devices that consume more power when the motor is switching? This might explain some of the current.Yes, it is expected the current will...
View ArticleDRV8301 supply current versus transistor total charge
Hello everyone,I am working on a desing with DRV8301.It works fine but I experience the circuit is warmer than expected.The plan is to drive 3 or more Mosfets in parallel.I have more prototypes and I...
View ArticleRE: DRV8308 Bad Commutation in SINE mode
RE, I am now having some luck with sine mode but I still have some way to go. If you please, could you tell me how the DRV8308 does the startup? I'm guessing that the DRV' starts in open loop PWM mode...
View ArticleClik here to view.
DRV8308 Bad Commutation in SINE mode
The DRV8308 register setup I am using is shown below.The mode is 120 deg commutatioin with single Hall (BASIC = 0, ENSINE=0)This runs the motor perfectly over a wide speed range. LOCKn active after...
View ArticleRE: DRV8870 / IVM, IVM(sleep) at VM=16V
Hello RE san,Thank you for the reply.Figure 3 is typical value for IVM(sleep)Could you please let me know the maximum value of IVM and IVM(sleep)?Best Regards,Ryuji Asaka
View Article