Hello, we are running a high-speed vacuum motor with FOC and were considering moving from a 3 shunt system to a single shunt design.
What are the tradeoffs here? Are there any performance tradeoffs (efficiency, noise, torque ripple)?
Compared with DRV8889, DRV8899's register CTRL5 becomes reserved.
Hi TI
For Open Load，PVDD=16V.
I measure VSHx=15.200V and VGHx=15.000V. Why VSHx have 0.8V voltage drop, VGHx have 1V voltage drop?(respect to PVDD)
I measure VSHy=0.517V and VGHy=0.502V. Why VSHy have 0.517V voltage drop, VGHy have 0.502V voltage drop?(respect to GND)
You give comment, that different comes from diode-drop shown on block diagram.
Why voltage drop difference? VSHx have 0.8V voltage drop respect to PVDD, but VSHy have 0.517V voltage drop respect to GND， why there is 0.5V difference？
Hi E2E,
We want to design a vibration motor application.
The motor requires a sine wave control signal of 160~200Hz 12Vrms.
Our schematic diagram is as follows:
We tried to configure 0x03 00h(20dB 400KHz) mode, but failed.
How should we configure the input PWM IN+/- from MCU 5V PWM? Is the LPF circuit need to be modified?
Best Regards
Dear TI Expert Team,
I am currently working on a project using the MCT8329A, for this project I would need to be able to know the firmware version of the chips.
After some searching in the Technical Reference I could not find any mention of a firmware or any way to check it.
Could you plese let me know if there is any way to know the firmware running on a chip or if that isn't possible, is the firmware frozen or will it be updated/changed?
Kind regards,
Simon Calvini
Dear TI team
I am trying to connect my MCT8329EVM using MCT8329A-GUI in both web and software version. It gets connected but as soon as try to read or write on EEPROM registers, the GUI pops up an error and the hardware is disconnected. I am sharing the screen recording of the issue.e2e.ti.com/.../Device-not-connecting.mp4
Hello team,
My customer is claiming that their DRV8434SEVM is not recognized by the GUI.
The GUI was installed properly, and I have checked that the software is running properly.
However, when they connected DRV8434SEVM, the GUI doesn't recognize the EVM, and says not connected.
Does this GUI require internet connection?
Is there any common mistakes when connecting EVM to PC?
Best Regards,
Kei Kuwahara
Hello - I am exploring solutions for a 200 watt nominal sensorless BLDC application - I am just looking for some guidance to narrow down the parts that I need to compare.
The application is automotive, 24vdc, precise speed regulation is not required,
Hey Folks,
What drives this requirement internally and what is the effect of pulling these pins to 1.8V when VDD is disconnected?
Thanks!
Cameron
Team,
In case that Itrip set at low current, such as 100mA, and TOFF set to 0, the Ivalley can be calculated as follows;
Ivalley = 19mA + 99% * 100mA = 118mA
Ivalley is greater than Itrip. What happens at this kind of cases?
Thanks,
Nobuhiko Wasa
I'm using a DRV8212 to control a motor in a handheld surgical instrument. When you press the button on the handle, a voltage regulator (9.2V nominal) is enabled. Once the power good output goes high, one of the DRV8212's inputs is pulled low while the other continues to be pulled high, and the motor spins. When the button is released, both outputs are pulled high, and the DRV8212 brakes the motor. There is a secondary switch that keeps the motor on until it finishes a complete rotation. The two switches are connected to a fault-tolerant OR-ing circuit that enables the voltage regulator.
The problem I'm seeing is that sometimes the DRV8212 is going into a strange state where it no longer responds to the input signals and its outputs produce small pulses every 1.5mS. Power cycling the chip seems to be the only way out of this state. Unplugging the motor has no effect and the DRV8212 is still in the bad state when the motor is plugged back in, so I don't believe it's an overcurrent problem. When it's in the failed state, IN1 is high, IN2 is low and the outputs are both doing those small pulses every 1.5mS. The bad state is rare, but has shown up on occasion in the O.R. I've been able to get it to happen by quickly pressing and releasing the button repeatedly over five minutes or more.
I've scoured the datasheet, app notes and forums for a symptom like this but have found nothing relevant. The complete schematic is below. Help would be much appreciated.
Dan
hi,
Q1：Is there a register that can read the speed mode or torque mode status？
Q2：Why is it useless to change PWM control when the motor loses control in speed mode when modifying SPEED-LOOD0DIS=1 torque mode?
Hi Team
Please tell me about unused pin processing of DRV8343-Q1.
It has a circuit configuration in which one of the three half bridges is unused.
The datasheet contains the following information:
"If a half-bridge is not used, the gate pins (GHx and GLx) can stay unconnected and the sense pins (SHx and DLx) can be tied directly or with a resistor to GND."
However, the following description is in the past E2E.
1) INHx/INLx - tie to GND or float
2) Tie GHx to SHx
3) Tie DLx, GLx, and SLx together
Which connection is better?
Please tell me if the data sheet references are different.
best regards
manabu
Hello team,
I just want to know the reason of delete the "Inductive AVS" section in the datasheet from Datasheet revision "F".
Would you let me know the reason?
Thank you so much.
Hello Team,
customer see leakage current sinking into OUT pins even when tri-state.
Is there a specification available for this current?
Background: There is a supercap storage behind this driver and this leakage will dis-charge the cap.
Many Thanks
Josef
Hi BLDC team,
I am looking at the datasheet of this IC.
Typically, when talking about the rpm of the motor, below calculation is used, as per my understanding.
This picture is taken from MCT8316A Tuning Guide.
I would like to know how this calculation applies for this IC.
With 1x PWM control, and several "MODES" are set for this IC, I would like to know what variables affect the actual frequency in the calculation.
At the same time, what would be the maximum rpm for this IC?
Thanks,
Luke
"I would like to receive a review on whether there are any issues with the MOSFET selection for driving the motor and if there are any errors in the circuit configuration."
Hi team,
My customer is evaluating DRV8243SQRHLRQ1 in their project and met below question, could you please help review and give some comments? Thank you!
When the customer debugs the DRV8243S-Q1, the motor will operate normally with a drive current of 1A, but the IPROPI pin is always 0V. Could you please help understand why this is happening?
Below are their schematic and code.
e2e.ti.com/.../device_5F00_8243.c
e2e.ti.com/.../device_5F00_8243.h
Regards,
Ivy
Hi,
We are using the DRV8432 driver for years to control two L-C tank resonators, one for each Full Bridge. As known DRV8432 is obsolete and we are looking for an alternative.
The main advantage for us is that the full bridge of DRV8432 could be manage with very low voltage, in our case 1.5Vdc which is within the range according to the datasheet: 0 - 52.5Vdc.
There are some alternatives but they have a min. voltage of 4.5V - 5.5V, which is no valid for us. I read the FAQ post https://e2e.ti.com/support/motor-drivers-group/motor-drivers/f/motor-drivers-forum/1256603/faq-what-are-the-best-alternate-devices-for-drv8432 but they have this min voltage lockout.
Our design requires 9 - 10A current, so in order to minimize the power losses and temperature we are evaluating the BOOSTXL-DRV8230x which includes the DRV8320 and the CSD88584Q5DC NMOS power block. They work really good at 24Vdc and high current, but the driver also has a minim of 6V operation, so we cannot work at 1.5Vdc.
This driver uses a Vdrain pin to sense the limit current. As described in the datasheet this pin must be connected to the DRAIN of MOSFETs (CSD88584Q5DC) and I read in the forums is it not recommended to separate this connection due internal performance (I was thinking to separate them to achieve the 1.5Vdc in the half bridge).
So my concern are:
1. If there are some full or half bridge driver which operates from 0 to >30V and 9 - 10A. DRV8412 driver is not enough for our application in terms of current and temperature.
2. If not, there are any alternative using a separate driver + Mosfet as used in BOOSTXL-DRV8230x? Can I modify the recommended this topology to work within the range 1.5 to >30Vdc?
Thanks.
Joaquim.
Dear TI,
I have the problem to getting started with the DRV10975EVM.
OS: Windows 10
After the successful installtion of the USB2ANY interface, I stuck with the right installation of the old LabView version 2014 which provides only the runtime from LabView.
After the successful installation of the old version of LabView 2014, I call DRV109xx EVM.exe and will get:
Sorry is written in german.
I use already the right Version 2014 and I don't have any other Tools from NI installed.
Can somebody give me the solution, how can I set the Motor parameter inside of the DRV10975 via I2C without using LabView?
Or tell me, what is wrong, why my Version dosen't fit the Setup (Version 3.3.4.0) from TI? I was also testing the LabView Version 2010 without success.
I took also in account that ticket here:
But this dosen't solve my problem as well.
Thank you in advance.
Best
Ulf