Hi James,
Is this a new board or the BOOSTXL-DRV8320H?
Which GH and GL signal have you captured?
What does the SH pin look?
Did you try operating the device with no load to confirm the outputs are correct?
Please consider re-enabling the VDS protection. If you are debugging a new board, disabling protection could allow undesired operation.
Part Number: DRV8320
Test Conditions:
System VCC 14V
Mode pin connect to Gnd
Idrive pin connect 18K to VCC 3.3V
VDS pin connect to VCC 3.3V
Use 6x PWM do 6-step block commutation spin function (reference below table), DRV8320H immediately damage for just start spin motor .Replace new one test again still damage .Please help to comment on this, thanks !
H1 | H2 | H3 | GHU | GLU | GHV | GLV | GHW | GLW |
1 | 0 | 1 | PWM | L | L | L | L | H |
1 | 0 | 0 | L | L | PWM | L | L | H |
1 | 1 | 0 | L | H | PWM | L | L | L |
0 | 1 | 0 | L | H | L | L | PWM | L |
0 | 1 | 1 | L | L | L | H | PWM | L |
0 | 0 | 1 | PWM | L | L | H | L | L |
Hi Rick,
I think you are right. This could be caused by the current limit. The OC_ADJ resistor used is 100K.
The topology to drive the chip is the same as the one shown in Figure 11 of the datasheet.
The parallel capacitor used between the two channels is 6.8uF.
Part Number: DRV8703-Q1
Dear, Sir.
The design at my customer side using DRV8703-Q1 is proceeding well.
So they have started the reviewing of protection functiions which DRV8703-Q1 has.
I would like to make sre as followings to make clear answers against them
Please give your advice.
1. GDF.
High-side & Low-side FET Gate deriving voltage are defined on DS.
Are there the voltage threshold on each to judge error or normal after tDRIVE?
2. OTW .
1) I wonder the temperatre measurement on the chip would be just 1 point & it
used for OTW & TSD?
If taht true, OTW happened, then TSD happened would be reasonable senario?
2) For clear OTW bit, the writing CLR_FLT bit was needed?
3. TSD.
Is it possible to clarify the max. value of TSD?
Too higher temperature will create other concern such as degradation.
4. SPI I/F Diagnostic.
The customer is considering the method to realize SPI I/F diagnostic on DRV8703-Q1.
1) ADRS 0x02, LOCK bits will be 011 or 110. They considering to write 000 on this
resister & read out 0x02 to be all 0.
Is it no problem to write 000 on ADRS 0x02 LOCK bits?
2) Personally, /FAULT pin check => Write 1 to CL_FLT bit => Read ADRS 0x00=all 0,
This way would be safer to avoid miss-setting of resister. How do you think?
3) Please give your advice if you have better idea.
Best Regards,
H. Sakai
Part Number: DRV8711
Hi
We are going to control Stepper Motor using Direct PWM method in DRV8711. So, we need to set different current values in each coil. In datasheet, there is given single Torque register. How can I set different current (90 Deg phase shift) in both coils?
Regards
R.Sivasuryan
Hi,
I would like to know if there are any Stepper motor Gate drivers that provide PWM mode of driving the along with internal current control and microstepping option
Thanks,
Regards,
B.Janani
Part Number: DRV8825
Hi, above is the sch,
MODE0 MODE1 MODE2 ------> High
DECAY ------------------------------> High
ENABLE --------------------------->LOW
----------------------------------------------------------------------------------------------------------------------------
Drive 42 stepper motors
1. when use +12V power supply
AVREF/BVREF adjustment voltage is lower than 0.5V, the motor can work,
When the regulation voltage is greater than 0.5V,,, start the motor, the motor will not work, at this time nFault is low
2. When use +24V power supply
The AVREF/BVREF adjustment voltage is lower than 1.1V , the motor can work,
When the adjustment voltage is greater than 1.1V, start the motor , it does not work. At this time, nFault is low.
both the 12V or 24V power supply, the motor speed can not exceed 200rpm.
What is the cause of this problem and how is it handled?
Hi Rick
In the functional block diagram, it is showing there are two Torque DACs. Can you let me know the number of Torque DAC in DRV8711 in PWM input mode for driving stepper motor.
Thanks and regards,
R.Sivasuryan
Part Number: DRV8313
HI,
I have been successful driving a DRV8313 with multi wheel robotics using Gimbal motors like the small ones found on quad copters. Currently I use an ESP32 and a table array to create the waveforms needed for the drv8313. This works ok but I would like to try and improve the smoothness of the drive and increase speed and torque.
I guess I am looking to measure some BACK EMF of the motor coils and use it to adjust the phase skew in an attempt to reduce some cogging.
Im looking for advice suggestions for components to have some sensor feedback to a Microcontroller.
I could probably write the software if I had a general idea of how to also setup the hardware. I have a number of free input GPOI0 pins to read voltages.
Any how i have looked through most of the internet for quite some time to get to this point but I am stuck
Any help greatly appreciated also if you ask questions I will try to be quite to respond.
Cheers
Adam
Hello Sakai-san,
My responses are in blue.
1. GDF.
Are there the voltage threshold on each to judge error or normal after tDRIVE?
JL: I do not currently have voltage threshold error data available for the GDF feature. The purpose of the GDF is mainly to detect shorts from GHx or GLx to GND, SHx, or VM. Is the customer concerned by a particular condition that makes them ask for this data?
2. OTW .
1) I wonder the temperatre measurement on the chip would be just 1 point & it used for OTW & TSD? If that true, OTW happened, then TSD happened would be reasonable senario?
JL: TSD occurs at higher temperatures than OTW. OTW only indicates that the device is near TSD. If the device heats further, it will shut down.
2) For clear OTW bit, the writing CLR_FLT bit was needed?
JL: The OTW bit should clear when the device temperature reduces.
3. TSD.
Is it possible to clarify the max. value of TSD? Too higher temperature will create other concern such as degradation.
JL: Some of our other gate drive devices specify TSD to 185C. That is my initial guess for an upper limit, but I can investigate further if needed. Since the DRV8703-Q1 is a gate driver, it will likely not have a significant amount of self-heating. This device likely will only experience an overtemperature condition if the ambient temperature or nearby devices exceed 150C.
4. SPI I/F Diagnostic.
The customer is considering the method to realize SPI I/F diagnostic on DRV8703-Q1.
1) ADRS 0x02, LOCK bits will be 011 or 110. They considering to write 000 on this register & read out 0x02 to be all 0. Is it no problem to write 000 on ADRS 0x02 LOCK bits?
JL: There is no problem writing 000 to the LOCK bits. The register map in the datasheet provides the following description to confirm this: “Writing any sequence other than 110b has no effect when unlocked.”
2) Personally, /FAULT pin check => Write 1 to CL_FLT bit => Read ADRS 0x00=all 0. This way would be safer to avoid miss-setting of register. How do you think?
JL: The Fault Status Register is read-only. You will not accidentally set this register. If you clear all the faults before you read the fault register, then you won’t know what fault occurred.