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TMS570LS1224: - code example for DRV3205?

July 10, 2018, 12:23 am
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Part Number: TMS570LS1224

Team,

I have seen the below video:
https://training.ti.com/programming-drv3205-q1-automotive-gate-driver-evm
https://training.ti.com/drv3205-q1-automotive-gate-driver-introduction-state-machine-and-faults
and read the below post:
https://e2e.ti.com/support/applications/motor_drivers/f/38/p/643045/2372484#2372484

-Where can the TMS570 side src code of the DRV3205 GUI/firmware be found?
-Can you please list me the TMS570 target SW (SDK, version,..etc) that is needed to be installed and the name/location of the DRV3205 example available?
- I did not find any information in the TIREX. Does it means that there are no public documentation for this?
-Is there an optimized Motor control lib like for C2000?

Thanks in advance,

Anthony

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RE: BOOSTXL-DRV8323RS: More labs supported for the BOOSTXL-DRV8323RS in next MotorWare?

July 16, 2018, 9:28 am
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Hi Lucas,

We do not have the intent to broaden lab support from our end.

In terms of the feasibility of adding the driver support to another lab, you will need to follow the steps outlined in the user's guide for successful import into CCS.

I will investigate the process and get back to you if there are additional modifications needed.

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BOOSTXL-DRV8323RS: More labs supported for the BOOSTXL-DRV8323RS in next MotorWare?

July 16, 2018, 7:50 am
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Part Number: BOOSTXL-DRV8323RS

As of right now there are only 6 MotorWare labs supported for the BOOSTXL-DRV8323RS as per the Quick Start Guide. Is there intent to broaden support for more labs? I could really use the support for Lab10e (Flying Start). If not, is it easy to adapt the Labs for the BOOSTXL-DRV8323RS?

-Lucas

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RE: TMS570LS1224: - code example for DRV3205?

July 16, 2018, 10:54 am
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Hi Alex,

As mentioned above, the DRV3205 is intended for automotive functional safety applications, and these applications usually involve advanced non-disclosure agreements and restrictions. Please start by requesting datasheet access for the DRV3205 at the following link:
www.ti.com/.../swlicexportcontrol.tsp

Thanks,
Garrett
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DRV10983: calculating in/out power

July 16, 2018, 2:19 pm
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Part Number: DRV10983

Team, 

How can my customer calculate power in or out of the DRV10983?

It looks like there should be a relationship between the speed command and actual speed but I have been unable to figure it out.

Thanks

Viktorija

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RE: BOOSTXL-DRV8323RS: More labs supported for the BOOSTXL-DRV8323RS in next MotorWare?

July 16, 2018, 2:48 pm
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MotorControl SDK will add support for the upcoming DRV8320 Boosterpack. The SDK is on-track to be released towards the end of this year. It will include a flying start example using the DRV8320, which should make for a pretty easy transition to a DRV8323 example. Otherwise, using the existing Motorware 18 examples, you should be able to modify the HAL and other drivers to add DRV8323RS support for existing F2802x/F2806x Launchpads

Sean
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RE: BOOSTXL-DRV8323RS: More labs supported for the BOOSTXL-DRV8323RS in next MotorWare?

July 16, 2018, 4:13 pm
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Hector, Sean,

Thank you very much for your time. I already have experience using the DRV8320H Boosterpack with trapezoidal control. I'm glad to hear that i'll be able to give it FOC capabilities through InstaSpin and MotorWare later this year. It looks like the easiest solution for now would be to utilize the DRV8305 Boosterpack as it is compatible with all of the MotorWare labs out of the box and can handle the voltage/current necessary for my application. The application is an e-scooter that utilizes the InstaSpin technology for maximum efficiency and smooth operation of the motor. This will be my course of action unless you have a better recommendation.

-Lucas
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RE: DRV8881: DRV8881P (R1 and R2 value)

July 16, 2018, 5:03 pm
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Hi Farinaz,

R1 and R2 are calculated based on the VREF voltage needed to achieve the desired current with the specified resistor.

Example: To achieve 2A using 250mOhm resistor, you will need VREF to be 3.3V. VREF = Itrip * 6.6 * .25 Ohm, or 3.3V.

Once you know what the VREF voltage should be, you then create a resistor divider using R1/R2 to adjust the current. I suggest you use a footprint for both R1 and R2. For 2A Itrip, you can use a 0 Ohm resistor for R1.
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DRV8881: DRV8881P (R1 and R2 value)

July 16, 2018, 3:50 pm
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Part Number: DRV8881

Hi,

I am working on schematic of DRV8881P motor driver and I had question about R1 and R2. I have 250mOhm current sense resistor, 2 Ahm current by using equation (1) of data sheet. How can I find the value of R1 and R2?

Regards,

Farinaz

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RE: BOOSTXL-DRV8323RS: More labs supported for the BOOSTXL-DRV8323RS in next MotorWare?

July 16, 2018, 6:36 pm
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You can take that course of action, or wait until the SDK by end of this year and utilize Motorcontrol with BOOSTXL-DRV8320RS. Depends on your timeline and application needs.
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DRV10983: DRV10983

July 16, 2018, 10:12 pm
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Part Number: DRV10983

Dear Team,

We are working on BLDC motor & using DRV10983. We are having some queries which are as follows:

  • Our controller works on 5V, the DRV10983 integrated buck/linear regulator gives either 5 or 3.3 V for powering both internal and external circuit.           

            The voltage measured on VREG pin is 3.3V, how can they make it 5V for running there  controller.

  • We want I2C to communicate with DRV10983, can you please share any example code or how to communicate through I2C.
  • Currently, We are  taking help from SLVUAA5 for using I2C communication with DRV.
  • while tuning motor using DRV10983EVM GUI there is an error message displaying <ERR> register writing not successful.

Please help to resolve these above queries.

Thanks & regards,

Hemantha Kumara N K

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RE: DRV8703-Q1: Review of Protection Functions

July 16, 2018, 11:09 pm
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Dear, James-san. 

Thank you so much for your valuable advice. 

Regarding GDF, I will try to explain without clear threshold mentioning. Please help

when the customer would point out that. 

I got additional questions from them. Sorry again, but Please give your advice one more time. 

5. /FAULT & /WDFLT. 

   Which state will be indicated on /FAULT pin & /WDFLT pin during Sleep mode? Hi-Z(OPEN)?

6. /SCS SPI. 

   They would like to /SCS pin tied to GND. is it no problem on SPI communication? 

   tHI_SCS & tSU_SCS are needed? 

Best Regards, 

H. Sakai

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RE: DRV8303: SMT production

July 17, 2018, 1:16 am
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Mr.Rick

Thank you for your advise.
My question is cleared by your advise.

Thanks again.
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DRV8303: SMT production

July 12, 2018, 11:57 pm
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Part Number: DRV8303

I would like to have reflow oven thermal profile for DRV8303.

Could you please advise better condition?

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DRV10987: Spread spectrum modulation control

July 17, 2018, 2:22 am
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Part Number: DRV10987

Hi guys,

i have a question regarding the DRV10987 spread spectrum modulation control functionality.

According to the datasheet, one can set the CONFIG1 Register Bit 15:14 for spread spectrum modulation control as follows:
00: No spread spectrum
01: ±5% dithering
10: ±10% dithering
11: ±15% dithering

For testing, i have attached a current probe into one motor phase, connected it to a spectrum analyzer and captured the following screenshot

  • No SSM -> green trace
  • 15 % dithering -> yellow trace (Similar results can be seen with ±5% dithering and ±10% dithering.)

PWM freq was set to 50 kHz. One can clearly see the peak and its harmonics. However, I would have expected the peaks to more or less disappear and the overall noise level to rise when enabling the SSM.

Any suggestions? Am i doing something wrong? To me, it looks like the PWM frequency is shifted but not increased regarding the bandwidth.

Help is highly appreciated.

Thanks in advance, Jonathan

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RE: DRV8801: VPROPI driven low problem

July 17, 2018, 5:30 am
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Hi Gene,

Yes, overcurrent will cause VPROPI to read 0V. VPROPI is designed to read the current through the resistor to GND.

During an overcurrent event the current flows the opposite direction, causing the voltage to be negative. VPROPI cannot create a negative voltage.
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DRV8801: VPROPI driven low problem

July 17, 2018, 12:44 am
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Part Number: DRV8801

Hi team, 

When using DRV8801, is it right that over current would bring VPROPI pin to low?  What is the cause?

Best regards

Gene

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RE: DRV8872: nFault driven low problem

July 17, 2018, 5:34 am
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Hi Gene,

The DRV8872 has an undervoltage protection similar to the DRV8801.

An undervoltage fault occurs as VM drops below 6.4V maximum. The device is then disabled until VM rises to 6.5V max. Once VM rises above 6.5V, the DRV8881 is re-enabled. Please see section 7.3.12 of the datasheet for details.
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DRV8872: nFault driven low problem

July 17, 2018, 2:05 am
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Part Number: DRV8872

Hi Team,

Compared to DRV8801, there is no VBBNFR for the VBB nFault release, then is it right that VBB>6V then nFault release

Best regards

Gene

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RE: TMS570LS1224: - code example for DRV3205?

July 17, 2018, 8:07 am
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