Clik here to view.
DRV8305 instability at high-current, fast turn-ON
It seems the stability of the output is related to the dv/dt of the drain-source voltage on the FET. Using registers5 and 6 to set the current levels higher, there is significant ringing on the output...
View ArticleRE: DRV8704 SPI Interface
Hi Josef, When SCS is low, the SDATO output is inactive. This is also true of the DRV8711, a device that is similar.
View ArticleDRV8704 SPI Interface
Dear Motor Driver Team,we want to use the DRV8704 on an SPI Interface with multiple slaves.For this it needs to be ensure that SPI-SDATO output of DRV8704 is high-impedance when SPI-SCS is...
View ArticleRE: DRV 8307 GATE Current capacity
Hi Dinesh, Sorry for the delay. The filter and compensator in the DRV8308 are both designed to compensate for the two-pole open loop response of the motor. Without the filters included in the feedback...
View ArticleRE: Motor position control example
Hi, Do you have a target application in mind? Are you interested in all motor types (brushed, brushless, stepper)?
View ArticleClik here to view.
DRV8303 gate output problems
I'm using a DRV8303 to turn on 6 IRFB3077PBF transistors that control a sensored BLDC motor. Everything is wired up on a breadboard with the DRV8303 mounted on its own breakout board. When I run the...
View ArticleRE: DRV8305 Ringing
Hi Will, Another question: Where are the measurements taken for the gate measurements (on the pin side of the resistor or the FET side of the resistor)?
View ArticleDRV8305 Ringing
Please advise on the customer feedback and questions below: We are using the DRV8305 FET driver and are having some issues with it. Here is a summary of what we are seeing on the TI DRV8305 part.If we...
View ArticleRE: Motor position control example
I don't have a target application in mind. In regards to motor types, I would like to start out with one I can easily obtain and experiment with (to understand motor position control).
View ArticleRE: Motor position control example
I would suggest you start with a stepper motor. It has finite repeatable movements as long as the current requirements are met. There are many places where you can find stepper motors and evaluation...
View ArticleMotor position control example
Hello, I am beginning to look into motor position control.Should I start out with a stepper?Any recommendations?
View ArticleClik here to view.
Device suggestion
Hola,We have a Megapixel Motorized Zoom lens as below：[View:/cfs-file/__key/communityserver-discussions-components-files/38/YT2812DB.ICR_2D00_JZ_2D00_6._2800DB56AC992900_.pdf:1230:0]And we need a...
View ArticleRE: DRV8850 PWM micro pin count
Hi Ian, Unfortunately, there is not an elegant way to drive the DRV8850 with two IO lines. There may still be a less elegant method. Are you using both DRV8850 devices at the same time? If not, can you...
View ArticleDRV8850 PWM micro pin count
Hello,I am looking at designing in 2x DRV8850 into a product to replace an Allegro A3906. I need more current drive and the inbuilt LDO would be good too. The A3906 has 2 inputs (IN1, IN2) to control...
View ArticleRE: DRV8871 startup
Hello Rick-san,Thank you for your comment.Pease see attached file, there are two circuits for driving two different motors.In their measurement, the motors had not driven with Rilim=39k ohm, but they...
View ArticleRE: GND and GVDD_C connection on DRV8332
Hi Michael,The DRV8432EVM is very similar to the DRV8332. Technical documents (schematics and gerbers) for it can be found at www.ti.com/.../drv8432evm[quote user="Michael Levin45"]1. What is the best...
View ArticleRE: DRV110 minimum ON time
The solution to reduce noise on the EN pin is to put a 10uF capacitor after the bridge rectifier and 10 pF cap from EN pin to ground.
View ArticleDRV110 minimum ON time
Hello team,Is there a minimum ON time sepc for OUT pin voltage on DRV110 device?In one of the design I observed, as input voltage was increased, pulse width/frequency at OUT pin remained constant but...
View ArticleRE: DRV8871 startup
Hi Sato-san,Thank you for the scope captures.Is there a capacitor across the motor terminal? Is this causing the current spike?[quote user="Hiroshi Sato"]The customer want to know how to use DRV8871...
View Article