Part Number:DRV8881
Hi all
Would you mind if we ask DRV8881?
There is the description "Table 6. Adaptive Blanking Time Settings over Torque DAC and xVREF Input".
Adaptive blanking time feature automatically scales the minimum drive time with output current.
Therefore,
In case of 1.80us "XREF 2.475 → 3.300 V" and "TORQUE DAC TRQ[1:0] SETTING 0-100%",
with adaptive blanking time feature, blanking time is adjusted within 1.8us, right?
Kind regards,
Hirotaka Matsumoto
Part Number:DRV8307
Hello,
I have developed a dual BLDC motor controller PCB. The PCB design basically implements the DRV8307EVM twice on a single PCB excluding the SN74CBT3244CBTCPW switch network. The BLDC motors have single-ended hall sensors wired to HU-, HV-, and HW- of the DRV8307. HU-, HV-. and HW- are wired to 5v pull-up resistors. HU+, HV+, and HW+ are biased at 2v. Both left and right motors turn from a stopped position. The left motor has A LOT of torque. The motor does not stall when applying my hand acting as a braking force. However, the right motor does not have much torques at all. It does not require much of a hand braking force to stall the motor. The motor will also stall without a braking force at about 70% speed. The motor continues to make a commutation noise (sing) after the motor stalls. The fault LED also comes on. I have verified that all three hall sensors pulse the input.
Any help to solve this problem would be greatly appreciated.
Thank you,
Part Number:DRV2605L
Respected Sir,
I have interfaced DRV2605L module to cypress controller with PWM pin to Drive ERM Motor but Not Able to Drive it . I Configured VCC=3.3 or 5 volt , Ground, EN=VCC, SDA ,SCL , And IN/Trig=PWM pin of Cypress Controller. but Not getting Voltage at the output of DRV2605L Module . I am doing high PWM pin After I2C Configuration between Cypress controller and DRV2605L Module but NOT Able to Drive it. Not Getting Voltage at the output of DRV2605L module . Please give me the steps to Configured the DRV2605L module to Drive ERM Motor.
I have configured following register values of DRV2605L Module. also please give me the steps and required register values and settings to drive ERM motor which is connected to DRV2605l .
0x00= 0x00, 0x01=0x00, 0x02=0x00, 0x03=0x01, 0x04=0x01, 0x05=0x00, 0x06=0x00, 0x07=0x00, 0x08=0x00, 0x09=0x00, 0x0A=0x00, 0x0B=0x00, 0x0C=0x01, 0x0D=0x00, 0x0E=0x00, 0x0F=0x00, 0x10=0x00, 0x11=0x05, 0x12=0x19, 0x13=0xFF, 0x14=0x19, 0x15=0xFF, 0x16=0x3E, 0x17=0x8C, 0x18=0x0C, 0x19=0x6F, 0x1A=0x36, 0x1B=0x93, 0x1C=0x5A, 0x1D=0x60, 0x1E=0x30, 0x1F=0xA0, 0x20=0x00, 0x21=0x00, 0x22=0x00.
Part Number:DRV8702-Q1
Hi,
I've designed a board with this gate driver and the IPG20N10S4L-22, to be driven by independent PWM. However, as soon as it turns on, the nFault triggers, even with nothing on the inputs.
Can you spot any problem with the board?
Thanks,
Federico
Part Number:DRV2604
Is there a way for the driver to "auto-detect" whether there is an LRA or ERM attached to the device?
Is it possible to use the auto calibration feature for this?
Thanks,
Dave
Part Number:DRV2625
Tool/software: Code Composer Studio
Dear,
About RTP Mode , if we send 0x00 1 time, PWM duty 50% is always have? or just once?
between open loop and close loop different?
If any suggestion, Please advise me.
Thanks,
Best regards,
Lawrence.
Part Number:DRV8872-Q1
Hello,
I understand DRV8872-Q1 uses Cu wires, but has DRV8872-Q1 already been qualified for AEC-Q006? If not yet, would you please tell me when it will be?
Best Regards,
Yoshikazu Kawasaki
Part Number:DRV10970
I am using DRV10970 for precision speed control of a three phase BLDC motor (FaullHauber 2610B). The motor has the following specifications:
Motor Torque Constant: 8.8 mNm/A
Rotor Inertia: 7.9 gcm^2
Phase to phase Resistance: 6.97 ohm
Phase to phase Inductance: 486 uH
The voltage provided to the driver is 5V and the exact configuration can be seen in the schematic attached.
Current Limit : 100mA
Retry Time = 250ms
Fig. 1: Schematic of DRV 10970
During our preliminary testing, it was observed that if we toggle FR (Direction Reversal) pin when the motor was running braked instantly (Dynamic Braking). According to the datasheet, the driver should brake the motor based on the BRKMOD setting and then reverse direction which we were able to observe correctly.
We intend an extended use of the FR pin for speed control since the PWM has a resolution of 0.4% duty cycle and has a deadband in the region +-10% duty cycle. We were planning to overcome this limitation by applying either a 100% or a floating voltage to PWM pin and applying a PWM signal to the FR pin to modulate motor speed keeping the BRKMOD to dynamic braking. Plan was to achieve low motor rpm and fine control by toggling FR at a suitable frequency like a Class-A chopper. We attempted the same at a wide range of frequencies, 100Hz to 50kHz. At 100 Hz the motor didn’t respond to duty cycles above 0 and 100%, effectively in high and low states for FR. At higher frequencies, the RPM stayed constant in one direction from duty cycles 0 to 30(for 50 KHz) and in other direction from a Duty Cycle of 70 to 100 but didn’t respond in the intermediate range.
Fig.2: 50 KHz – 10 DC at FR
Fig.3: Hall switching Frequency with FR at 10% DC
Fig 4.50 KHz – 70 DC at FR
Fig.5: Hall Switching Frequency with FR at 70% DC
Fig.6: 50 KHz-90%DC on FR
Fig.7: Hall Switching Frequency with FR at 90% DC
In our actual system, a flywheel of significantly higher MOI than the rotor would be attached to the motor shaft and any ripple in the rpm due to the toggling would be significantly reduced. Could you guide or point to what we did wrong, or if we cannot use FR for such implementations?
Part Number:DRV8825
Hi,
We are using stepper motor driver DRV8825 in our project. Schematic for the same is given below.
Thanks,
Indhu N
Part Number:DRV8308EVM
I am having some issues communicating with the DRV8308 on the DRV8308EVM. I want to be able to communicate with the DRV8308 via a SPI interface from a separate microcontroller rather than with the GUI. Currently I have pulled the jumpers and wired in MOSI MISO SCLK and SCS all from a separate micro controller directly to the EVM board. I have also jumped a 5V power to the RESET pin as well as have the jumper in place to pull SMODE LOW. I am unable to read from the 0x2A register which should return a value of 0x18.
Here are my signals.
Part Number:DRV8343-Q1
Hi,
I am working on DRV8343-Q1 and want to set this device to drive BLDC motor.
I have try to send some SPI command and configure it but not able to operate device.
Presently I am working on home made board, In which I have connected LED on output of driver for indication (GLB, GLC).
If I put current sense open will it affect functionality of hardware.
Can someone share minimum hardware configuration required to operate this device with SPI command.
Part Number:DRV8353R
Hi. I am using the DRV8353RH in a high-current motor-control application which requires multiple, paralleled FETs to keep the Rds power dissipation down. Adding the FETs has increased the total gate charge and the math is telling me I need to increase my gate drive beyond what the IC is normally capable of. On the low-side, I think I'm in good shape. Insert a FET driver on the low-side gate lines, power the driver off of VGLS, ensuring the current doesn't exceed the 25mA available, and (conceptually) I'm good to go. The high-side (HS) has me a bit confused, however. Normally, I would expect the HS drive voltage to be referenced to the source of the upper-half N-FET. In this way, we'd always have ~12V to put across Vgs for turn-on. On the DRV8353 however, the charge pump/HS voltage is referenced to the HS FET drains. I suppose this allows the use of only a single charge pump across 3 half-bridges, but I'm at a bit of a loss as how to wedge additional gate drive in here. Any thoughts?
When I tried to install using GUI_Composer_InstaSPINs_F2806xM_install.exe, I found an attched error message.
Part Number:DRV3245Q-Q1
Hi Team,
We are designing DRV3245 PCB
Can I Use 0Ω resistance at current measure input route ?
Can we change CSA output filter parameter from 1K/1nF to 330R/470pF?
Can we choose 25V cap for CP1 and 50V cap for CP2?
I found there is difference on VM supply configuration for DRV8320H and DRV8350H. The VM of the DRV8350H can be configured by either using single supply or dual supply. WHen using the dual supply, the gate drive voltage can be adjusted optimized to reduce the switching losses, right?
Can VM of the DRV8320H be configured to Dual supply also?
My customer would ike to use the DRV8320H for motor application with high freq(50KHz above) due to size constrain, but they worried the dissipation problem by the switching losses would be happened. Any comments?f Thanks.
Regards,
Brian
Part Number:DRV10983-Q1
hello experts,
I have own a DRV10983Q1EWM to evaluate my motor. From help from this forum, I can do open loop and close loop control very well.
https://e2e.ti.com/support/motor-drivers/f/38/t/773710
However, I got stuck at current limit alarm, and the driver will automatically shutdown the motor and restart gain when over current. Even the current is not high
I make a report file, but can not attach. So that I would like to past its content here:
I have some questions:
1. Speed motor report may not exactly. What should I do? may I ignore it?
2. why driver alarm Current limit while actual current is lower than its threshold?
Best regards,
My report file as below:
Picture 1: motor speed report may not exactly, it is far from the true. Over current is happened always at speed setting 280Hz. If increase speed setting to 300Hz, motor will shutdown automatically.
Picture 2: driver configuration
Picture 3: driver configuration
Picture 4: current waveform at phase V of the motor using current sensor ACS712ELC-05B. Voltage output 0à5V corresponding linearly with current input -5A à 5A (zero ampere mean 2.5V output).
From the wave form, we can see that the current is under 1A (the external digital monitor is also show that the average current is 0.8A). But the driver alarm Limit current even driver can run at 2A RMS, 3A max.
Part Number:DRV8825
I drive the motor to rotate a half-circle.
When the motor is running , I set the chopping current to 1.33A,
When the motor stops, I set the chopping current to 0.24A, and in most case, the supply current of 24V is about 0.13A when the motor stops.
But in some cases , the supply current of 24V is about 0.04A when the motor stops.and the motor can be rotated manually wiith few resistance.
what's the reason ?
Then I try the fast decay mode : when the motor stops.,the supply current of 24V is also about 0.04A and the motor can also be rotated manually wiith few resistance.
So I guess maybe the current decreased to 0 during chopping. Would the situation I decribed happen?
So, I plan to incease the chopping current when the motor stops, or I want to try to increase the value of C11. Here is my schematic:(some value is not the same as what I use to test.)
