Dear team,
Tests found that the DRV8889-Q1 cannot diagnose open circuit faults below -30 degrees Celsius, but it can still drive the motor. (Open circuit can be diagnosed at room temperature.)
The low temperature of -30 degrees is lower than the under-temperature warning threshold TUTW[-25 -10 5]. How to explain this problem?
Hi, Team
Hope you are doing well!
I have one question about our DRV8908-Q1:
The Pin15 of our DRV8908-Q1 is NC, is there any risk to connect the NC Pin to GND?
(Based on the data sheet, it says "Not connected".)
Best Regards
I am working on a project where I plan to use the DRV8870 motor driver to control multiple motors (14 DC brushed motors) in a single direction. I intend to connect the DRV8870's OUT1 to the input pins of 14 motors, using a shared trace for all motor inputs. Each motor's output pin will then connect to the drain of an individual MOSFET, with the source of each MOSFET connecting back to the DRV8870's OUT2. Only one motor is to be operated at a time, and thus only one MOSFET will be active at a time.
For my application, I will not require bidirectional control of the motors, and I plan to permanently set the IN2 pin low to disable the reverse direction. I have a few questions regarding this setup:
Thank you
Hi TI
I use DRV8714 driver a MOS(parameter shows at below picture)，but the rise time of gate isn't meet calculation.
Qgd = 9nC，Vsupply=16VDC，IDRVP_x=1111b = 62 mA (2.3 mA)，Trise=Qgd / IDRVP_x=9nC / 62mA=145ns，but my test Trise is 470ns.
My requirement is decrease Trise as much as possible，is there any method？
Hi!
I'm experiencing some problems reading the bus current from MCT8329 in a full custom application.
Reading Sys_Status1 returns the correct bus voltage. However when I read Sys_Status3 the DC_BUS_CURR is much too low (yes I divided by 256). I'm wondering in what way the MCT knows about the current in the system. It must be measured by the voltage drop over the shunt?! In my application the shunt is 750uR. So there must be a register, to set the shunt value for correct calculation inside the MCT. But this register doesn't exist (at least in the datasheet). I don't assume, that the MCT use some sophisticated algorithms to determine the real value of Rshunt....
So how do I calculate the correct bus current from DC_BUS_CURR for an arbitrary RShunt?
Kind regards,
Jonas
Hello,
I am testing DRV8329AEVM with LAUNCHXL-F280049C. I was able to spin the motor using an example program for the BLDC trap drive but I have an issue sensing the phase current. The output of the DRV8329A seems to be always stuck around 0.4V regardless of the motor phase current. See the plot below.
Would you be able to let me know what might be going on here?
Currently with the EVAL firmware pulled from the EVM's site, everything has compiled correctly. The only issue is when using the DRV8353Rx GUI, there seems to be no action happening. Following the DRV8353Rx-EVMInstaSPIN SoftwareQuickStartGuide instructions, the Controller state goes online, the Estimator State goes through different transitions, the Trajectory Reference goes up to the Speed Reference, but a Speed Error of the same RPM matches it qualifying for 0 RPMs. I have 31V powering the board with a 7A current limit, but current has yet to get above 0A. I'm not sure what else needs to be changed to the firmware or the hardware setup to get this moving.
Regarding the NC pin (15pin) on page 10 of the data sheet "drv8906-q1.pdf", it is written as "Not connected", but is it okay to use it with the terminal grounded to GND?
Hi Team,
My customer came to me with some questions on our DRV8323HRTAR for their design.
They found that the direction of the current in the shunt resistor reverses with each positive edge of the three Hall signals. This behavior does not occur with the negative edge:
They are using the DRV8323HRTAR with the 1xPWM mode.
Can you help me to understand this behavior? Are they doing something wrong? How can they solve this problem?
Thanks!
BR,
Alfred
The customer want to reduce cost when control the Motor using full bridge.
They want to eliminate GHy and GLx MOSFET because they do not need reverse operation of the MOTOR.
So whether it is available?
Besides, Can we float GLx/SLx and GHy DRAINY pin?
MCT8316AEVMを確認させてください。
GUI上の手順に従って動かそうとしたのですが、エラー表示はないのにモーターが駆動しない現象が発生しました。
e2e.ti.com/.../Question_2800_MCT8316AEVM_2900_-20240510.xlsx
詳細は添付のExcelに記載しておりますのでご確認ください。
Dear Team,
Absolute maximum rating of nSLEEP pin of DRV8424 is VVM (max).
Recommended operating condition of VI (Logic level input voltage) is 5.5V (max)
Electrical characteristics of LOGIC-LEVEL (nSLEEP), VIN is 1.5V (min) to 5.5V (max).
When the input voltage to the nSLEEP is higher than 5.5V, but lower than VM=24V, what operation mode does the DRV8424 become?
My customer is evaluating the DRV8424RGER with VM=24V.
Under M0=M1=0 for Full step setting, the DRV8424RGER operates Full step normally with nSLEEP > 5.5V.
However under M0=M1=1 for 1/8 step setting, the DRV8424RGER does not operate 1/8 setp with nSLEEP > 6.9V, the DRV8424RGER operates Full step. If nSLEEP < 6.5V, the DRV8424RGER operates 1/8 step normally. Why does the DRV8424RGER not opearate 1/8 step under nSLEEP > 6.9V and M0=M1=1? The DRV8424RGER operates what mode?
Thank you.
Best Regards,
Koshi Ninomiya
Hello team,
My customer is considering DRV8231 for driving solenoid.
My customer is wondering which decay mode should they use, slow decay (Brake) or fast decay (coast)?
I understand the benefit of fast decay becuase it will decay faster, but is there any benefits of chosing slow decay instead?
If there is no benefit in choosing slow decay, I will tell my customer to use fast decay.
Best Regards,
Kei Kuwahara
hi Expert,
i want ask two question about DRV8889-Q1
first, customer find the register 0X0A is 0X03 not the default, why happen this condition
Second , how to do the Stall Detection, csutomer want to test the Stall detection, but they don't know how to set up hardware and software。
Dear TI team:
I have written to RAM register to change configure data, but it doesn't takes effect at the first motor start-up. While at the twice motor start-up, it works.
Why this occurs? And how i can make the register works at the first motor start-up after register writes?
The flow is a example to describe my operation steps:
1) I write MOTOR_STARTUP1(84H) register by I2C communication, to configure ALIGN_TIME=1(=50 ms);
2) I control the motor rotated and then stop.
3) I write MOTOR_STARTUP1(84H) register, to configure ALIGN_TIME=2(=100 ms);
4) I control the motor rotate, and measured the real align-time is 50 ms, not 100 ms. But I read back the MOTOR_STARTUP1(84H) register, which the ALIGN_TIME=2(=100 ms);
5) I stopped the motor , and rotate it again. Now I measured the align-time is 100 ms.
Hello Team,
I am trying to spin a motor using DRV10983 EVM, behavior is as shown. Seems EVM tries to "Align" but never switches to "Go"
Attached is a video, as well as motor configuration file used in the GUI.
Thanks,
Mohamed
e2e.ti.com/.../EVM-No_5F00_Spin.mp4e2e.ti.com/.../Motor-Config.csv
Hi TI
When I use DRV8714 in my design，I developed Offline Short Circuit and Open Load Detection (OOL and OSC) function now.
I find a strange phenomenon, which is when I enable EN_DRV and disable EN_OLSC again, Vds status do not be cleared, which is still staty last status.
My step is
1. Seting IC_CTRL1 as 0x56(disable EN_DRV and enable EN_OLSC),
2. Setting OLSC_CTRL1 as 0x99
3. Read VDS_STAT1 is 0x66.
4. Seting IC_CTRL1 as 0x96(enable EN_DRV and disable EN_OLSC)
5. Read VDS_STAT1 is 0x66.(I think it should be 0x00)
Hi Team,
Due to footprint is so complicated, TPSM861257EVM have Gerber file?
Have you guys been able to roll out the new version of the EVM which does not have the fault that did not allow the EVM to be operated above 48V.??