Part Number: DRV8301
I need to realize a safe torque off function (STO) with the DRV8301. Can I turn off the voltage on pin PVDD1 (29) while the three half bridges remain powered? The following image illustrates my approach:
What are the maximum ratings of the pins GH_x, BST_x, SH_x and GL_x in general and regarding PVDD1. In the datasheet I have not found any specifications.
Are there any other issue I will have to consider?
Part Number: DRV8870
Hi,
I am using DSPIC33EP512 MCU to control the PWM output of DRV8870. When set the duty cycle to any level between 1-100% to PWM control IN1 or IN2 of DRV8870, the output of Out1 or Out2 is not matching with the PWM i set. Ex: If i set it 100%, the output is around 28%. If I only control IN1 or IN2 as On or Off, the Out1 and Out2 voltage are as expected.
I am using CCS C compiler IDE version 5.064, and the control. With the same control i tested to PWM control a mosfet gate, and the duty cycle come out as expected.
[View:/cfs-file/__key/communityserver-discussions-components-files/38/DRV8870-Circuit.pdf:1230:0]
Part Number: DRV8301
Hi All,
I am using the DRV8301 in a design. I soldered only the components necessary for 3.3V output and see a 3.3V output that gets noisier with an increase of the VBUS voltage. When I connect a 100 ohm resistor, the DRV8301 makes a buzzing or humming sound, even with VBUS at 12V. Is this problem recognizable to anyone?
Thanks,
Angela
Part Number: DRV8818
Hi,
I am trying to swap this in as a replacement for an older stepper driver, but we were using a 6V supply for that one, the max limit says 5.5V, and I am mesuring around 5.6V-5.7V at the board. Does anyone know if this will cause an issue where some of our commands would not work? The jog up a small amount command is only working about 10% of the time.
Thanks,
Cory
Part Number: DRV10983
1. I m looking forward to use DRV10983 to control BLDC motor. Can somebody tell me what is the criteria to choose a controller to support the driver?
2. Can somebody suggest me a cheap controller for the same task?
Hi, I'm looking to create a battery powered application that drives a motor. Only one motor, only one control, like this:
But mine is different. The whole application runs on a Li-Ion battery, so I only have 3.3V for the microcontroller. So my max Vgs is 3.3 V. Similarly, my motor will be fed by 3.3 V. The motor will draw around 300 mA. So to not have too much of a voltage drop on the MOSFET, I'd like the Rds to be sub-ohm with a Vgs of 3.3 V while passing 300 mA. I've tested almost a dozen transistors whose datasheet looks promising, but I always see a Vds of 0.6 - 1V, which kills the performance of the motor.
Are there any MOSFETs that have a very low (ideally ~100 mOhm) Rds with a Vgs of 3.3 and with an Id of 300 mA?
Thanks.
Hi Rick Duncan
Thank you for your advice.
Is monitoring the mv voltage the chip's vm pin?
If so, can I configure a simple constant voltage (about 30V) circuit on the VM pin to avoid high voltage on the VM pin?
I understand that this is not related to the difference in MOSFET supply voltage.
We are working to reduce spikes on the motor side for the anode spikes on the SHx pin.
Our circuit is GH, the resistance to GL path is 0 ohm.
However, a small overshoot occurs when the MOSFET is turned on and off.
This appears as noise on the supply power of the entire circuit.
You may be busy, but I would like some advice.
Part Number: DRV8701
Thank you for your response.
I developed a motor drive using the drv8701p.
It is used in electric cars for children.
Sometimes, however, the drv8701p chip fires.
Where it occurs is concentrated in the VM portion of the drv8701p.
I need your help.
[View:/cfs-file/__key/communityserver-discussions-components-files/38/POWERPACK_5F00_EVL_2D00_1_2D00_4.pdf:1230:0]
Part Number: DRV3201-Q1
Hello,
Please correspond following question and request from customer.
2nd Stage Gain Drift vs. temperature.
Could you supply the graph that shows the relationship between Temperature and Gain Drift like Figure 36 and 37 of page48 for each Gain 1, 2, 3, 4.
Shift Buffer Offset Drift.
2-1. Datasheet has Shift Voltage Offset (+/-5mV) of Shift Buffer.
Does this +/-5mV include temperature offset drift?
2-2. Please advise amount of temperature offset drift.
Best Regards.
Part Number: DRV8308
Hi everybody,
I am working with a DRV8308 and i have achieved to make it work quite well, but still want to solve an issue which happens at low speeds.
I am controlling a motor which is inside a mechanic reductive thing and this mechanic thing is coupled to a load. This load is 100N of resistive torque, right?
When the motor tries to move, it does but it must do at more than 250rpm otherwise it starts moving but only during a few seconds (less than a turn).
Please how can i adjust or tune the registers so i can make it work at 200rpm?
The registers setting is:
0x00-------24577
0x01-------1
0x02-------1204
0x03-------57218
0x04-------687
0x05-------12289
0x06-------33168
0x07-------300
0x08-------200
0x09-------500
0x0A-------62040
0x0B-------3500
By the way i am not sure what is the importance of the poles and zeros. Can anybody explain it a litte bit?
Thanks and best regards
Hi,
I'm using a hub motor with 24V and 25A maximum current. what driver will work for that current and voltage.Please suggest me some motor driver controller ic and it should be non-programmable.
Thanks & Regards
rohit
Hello Team,
Do we have a device similar to MLX90805? I have attached datasheet here.[View:/cfs-file/__key/communityserver-discussions-components-files/38/MLX90805.pdf:1230:0]
One of my customer is looking for alternate for this.
Regards,
Mahendra