DRV8701: over current protection of high side FET
Part Number: DRV8701We would like to use the DRV8701. The question is: The built-in "overcurrent monitor" protects especially the high side FET. We require at least two different cut-off limits for our...
View ArticleRE: DRV8871: Motor current measurement with DRV8871
Hi Franz, Your question has been replied to here: e2e.ti.com/.../2227639
View ArticleDRV8871: Motor current measurement with DRV8871
Part Number: DRV8871Hello,We would like to use the DRV8871. Because we want to use multiple motors synchronously with different chips, we need to measure the actual integral motor current. If we want...
View ArticleRE: DRV8305: reference voltage of VCPH charge pump
Hi Yamamoto-san, Your customer's concept is correct. For the DRV8305, the charge pump uses two flying caps when PVDD is below 18V. There is additional circuitry to control the internal FETs and voltage...
View ArticleDRV8305: reference voltage of VCPH charge pump
Part Number: DRV8305Dear all,I would like to make sure about VCPH charge pump voltage just in case.What voltage deos VCPH charge pump reference to? Is it PVDD?Best regards,
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RE: DRV110: Current unexpectedly changes with voltage to solenoid
Hi Travis,Unfortunately, couldn't get all of them on the same scope. But did Vout/gate and Vsense on one, then showed the voltage difference across the current sense resistor (0.03 ohm). We did a...
View ArticleRE: DRV595: Startup voltage issue
Hi Lixing, Are you following the start-up sequencing from the datasheet? "To ensure proper operation on power up, wait 10ms after PVCC and AVCC are stable before using the analog inputs, IN– and IN+....
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RE: DRV110: Current unexpectedly changes with voltage to solenoid
Thanks for the scope shots Matt!The Vout waveform confirms my belief from earlier- the MOSFET you are using is not achieving the rise time necessary for proper operation, as evidenced by the curved...
View ArticleRE: DRV110: Current unexpectedly changes with voltage to solenoid
Thank you very much Travis! I'll make these mods and post results...
View ArticleRE: DRV8839: MOTOR VIBRATION WHEN OPERATE 100% DUTY CYCLE
Hi Chintan, Can you provide scope captures of OUT1 and OUT2 when the vibration occurs? Also have you tried running the motor directly connected to a power supply? Does the motor vibrate at 3.3V?
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DRV8839: MOTOR VIBRATION WHEN OPERATE 100% DUTY CYCLE
Part Number: DRV8839Hello Sir,Good Morning,Task : PWM based Motor Drive using Motor Driver ICAs above mention project we working, we are facing issue of MOTOR Vibration while motor operate at 100% duty...
View ArticleRE: DRV595: Startup voltage issue
Hi Alex,Thanks a lot for your reply. Looks like we do not have the delay and this could cause issue. We will try again.Here are some more questions regarding the part:1. Will the driver limit duty...
View ArticleRE: How to rotate BLDC motor Counter-clock wise which is bundled with...
Hi , I need help to rotate the motor counter clock wise , I use sprc179, can you please write me the code to rotate it at 30 deg counterclock wise. TMS320f2812(Please visit the site to view this video)
View ArticleHow to rotate BLDC motor Counter-clock wise which is bundled with DRV8312-C2...
Dear Sir/Madam, i have studied datasheet of DRV8312 chip which explains the six commutation steps of BLDC motor. There is Figure 11 on Page 16 of datasheet which...
View ArticleDRV8837: two questions about DRV8837
Part Number: DRV8837Now，I am using DRV8837 drving a 3.6V/1.8A motor ，but a period of time later，I will drive a 12V/2A motor，Can I use two DRV8837 in parallel?At the same time，DRV8837 is controlled by...
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RE: DRV8839: MOTOR VIBRATION WHEN OPERATE 100% DUTY CYCLE
Hello Rick, Thanks for your reply.Below attached image describe signal between output 1 and output 2.We checked with 3.3v power supply to motor directly then vibration is same as 100% duty cycle.
View ArticleDRV8842: Motor reverses direction when stopped
Part Number: DRV8842Hello, I am interfacing a DC motor with MSP430G2553 microcontroller using DRV8842. I am using current regulation with I[4....0] = 00001 i.e 5% relative current.1.With...
View ArticleRE: DRV8837: two questions about DRV8837
Hello user4968441,This would not be recommended for this device. For the 12V/2A motor please use another device rated to handle your specs, you can look at our portfolio here.The DRV8837 is rated to...
View ArticleRE: DRV8842: Motor reverses direction when stopped
Hello th133,Are you using the DRV8842 EVM or your own designed board?Having bout IN low should just stop the device (slow decay) if you are using our EVM.Also, what sense resistor value are you using?...
View ArticleRE: DRV8839: MOTOR VIBRATION WHEN OPERATE 100% DUTY CYCLE
Hi Chintan, If the motor vibration is present when connected directly to the power supply, please work with the motor vendor to determine the reason.
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