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RE: DRV8894 the register of sense signal for the transfer

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Hi Matsumoto-san,

Would you please provide the revision and data of the datasheet?
Is this datasheet written in Japanese?

This may take some time to research.

RE: DRV8702D-Q1: Vdrain impacting current regulation ?

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The image didn't post properly. Can you please try reattaching it?

DRV8702D-Q1: Vdrain impacting current regulation ?

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Part Number: DRV8702D-Q1

Does the level of Vdrain have an effect on sensitivity of internal current regulation amplifier ?

For zero current and 5.5<Vdrain<12V, Voltage at SO pin is 480mV.

For zero current and Vdrain<5V, Voltage at SO pin is 200mV less.

Motor not spinning at Vdrain<5V, but value will be used for 0A reference.

Please explain relationship Vdrain - SO Voltage for this range of Vdrain.

RE: DRV8308: Any non-admin GUI for DRV8308

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Christina,

Here is the workaround:

1) Download runtime from http://software-dl.ti.com/ccs/non-esd/gui_composer/runtime/gcruntime-2.0.6-windows-installer.exe 

The one from the link above will contain an .exe named “gcruntime-2.0.6-windows-installer.exe”.

2)      Run the DRV GUI installer.

3)      Choose appropriate application and runtime locations, but avoid spaces in the runtime path name.

4)     When you see the following screen during installation, select the “Install from file” option, press the browse icon to the far left of this, and located the runtime installer named “gcruntime-2.0.6-windows-installer.exe”.  Your screen should look similar to the screen capture below(except actual runtime installer version)

5)      Press next and follow the instructions to complete the installation.

Regards,

-Adam

RE: 1xPWM mode logic check please...

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Min-Su,

Please check the high-side FET Gate and Source. I think you will find that some times when the gate signal is high, the source is also at the same high level which makes VGS = 0, the FET is OFF.

Regards,

-Adam

RE: BOOSTXL-DRV8305EVM: SPI kommunikation reponse always zero

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Uwe,

Have you checked if the MCU has an internal pull down for SDO?

Can you disconnect everything on SDO except the pull-up resistor and using a high impedance probe, check for output on SDO?

Regards,

-Adam

BOOSTXL-DRV8305EVM: SPI kommunikation reponse always zero

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Part Number: BOOSTXL-DRV8305EVM

Hello,
I have problems with the SPI communication. The timings were set according to data sheet. The SDO signal always goes to "zero" during transmission. Wake was set to logical 1. PVDD to 12V. See Scope. Evalboard is LAUCHXL2-570LC43.

1 = SCLK, 2 = SDI, 3 = SCS, 4 = SDI

Why do I receive no valide data?

Thanks

Uwe

RE: DRV8323: Driving Parallel-Connected MOSFETs

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Christian,

1. Yes this is correct, since one FET may take more current than the other, it is easier to balance this with resistors at the Gate pin. The other reason is that we want to dampen potential ringing.
2. Usually gate resistors are less than 10 ohms.
3. With the small resistance, this shouldn't be an issue.
4. These are not needed but can be added if additional slew rate control is needed.

Regards,

-Adam

RE: DRV8350: DRV8350H Availability

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David,

Let me check with the team.

Regards,

-Adam

DRV8350: DRV8350H Availability

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Part Number: DRV8350

Hello,

Are there any production samples available for the DRV8350H as of yet?

Thank you,

David

RE: DRV8894 the register of sense signal for the transfer

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Hi Rick,

I'm Sonoki colleague of Hirotaka. I sent DRV8894 datasheet via private message. Please let me discuss off line.

Best Regards,
Sonoki

RE: UC1625-SP: output of the PWM Amp/Comparator (EA_Voh)

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Dear Daniel,
thanks for your answer, I am also misunderstanding about this two points.

1, I have read the ''Radiation (ELDRS)Test Report'', the parameter 'EA VOH' have max limit (6V) and Min limit (3.6V). Dose that means the device works well when we get the output 3.8V during -55℃.
2, Can I validate the parameter 4.2V? If I want to get the 4.2V output, is there any suggestions about the circuit configuration or parameter set ?

The output is not a Logic output, but I do not understand this parameter very well.

Thanks,
Xiu

UC1625-SP: output of the PWM Amp/Comparator (EA_Voh)

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Part Number: UC1625-SP

The output of the  PWM Amp/Comparator  (EA_Voh)  is only about 3.95V,  expecially during -55℃  the output voltage is about  3.82V which can not reach to 4.2V as the datasheet shows. Is there any test  or apllycation  details suggestion?

RE: DRV8323: Driving Parallel-Connected MOSFETs

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Dear Adam,

Thanks again for your support. I'll install the resistors and make pictures of the voltage across them to check the current sharing. I understand that the sum of both currents should still have the rectangular waveform of Idrive amplitude presented in the data sheet, is that correct?

Best regards,

Cristian

RE: DRV8323: Gate driver fault

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Hi Adam,

thank you for the information.

I got feedback from my customer:

in our case it is not a matter of Tdrive. The FET is switched on proper.

But during operation the gate voltage drops, due to very high currents in the system, and causes a GDF error of the DRV.

We think the voltage level is still high enough for save operation of the FET.

Without knowing the exact voltage level, at which the DRV trips the GDF-error, it is difficult for us to decrease the gate voltage drop to a save level.

Regards,

Stani


DRV8323: Gate driver fault

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Part Number: DRV8323

Hello,

my customer is currently doing a design with our DRV8323 and they get GDF-errors and need to know, at which voltage level of Vgs, these errors are recognized from the DRV.

They could not find anything about that in the datasheet. Could you please provide this information.

regards,

Stani

RE: DRV8703-Q1: DRV8703-Q1

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 though DRV8703 32 PIN IC  is accompanied with 5 thermal  vias for dissipation, my PCB board is getting more heat. 

so my question is how many thermal vias  cab be used apart from given thermal vias?

DRV8703-Q1: DRV8703-Q1

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Part Number: DRV8703-Q1

hi,

question related to design, so how many vias can be used in and around mosfet ic DRV8703-Q1.

PLEASE GIDE US WITH PROPER INFORMATION

RE: BOOSTXL-DRV8305EVM: SPI kommunikation reponse always zero

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Uwe,

Did you try the experiment I mentioned?

Regards,

-Adam

RE: DRV8880: Noise hearing on run and holding condition at DRV8880

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Hi David,

I have not heard from you in some time. I hope your issue has been resolved, and am closing this post for now.

If you have further questions, please reply to the post. If the post is locked, please select "Ask a related question".
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