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CCS/DRV2625: "data to be played" of DRV2625
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DRV2511Q1EVM: DC input bias network required to establish the input common mode operating voltage
Part Number:DRV2511Q1EVM
Hi
I'm wanting to know whether the DRV2511Q1 requires a common mode bias voltage be established at IN+ and IN-.
I've got a circuit someone else designed where they have AC coupled a differential signals to IN+ and IN- of the DRV2511Q1, without any bias network to establish the DC operating point.
I see the gain resistors set what I assume is the differential mode input resistance. Does this also set the DC input impedance to ground, or are these high impedance nodes?
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DRV8305-Q1: Watchdog Fault
Part Number:DRV8305-Q1
Dear, Sir.
The datasheet described on once the watchdog fault occurred DRV8305-Q1& gate driver are put
into a safe state. However, the detail of the safe state is not explained the detail .
I wonder the safe state means the Standby mode on Figure 16. Operating States?
Please give your advice.
Best Regards,
H. Sakai
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DRV8305-Q1: 6-PWM Mode
Part Number:DRV8305-Q1
Dear, Sir.
My customer would like to all high-sdie FETs= OFF & all low-side FET's=ON itilizing
6-PWM mode.
I think;
INHA=0, INHB=0, INHC=0 & INLA=1, INLB=1, INLC1 setting could be met with ther
expectation, but I would like to dpuble-confirm.
Please give your advice.
Best Regards,
H. Sakai
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CCS/DRV2625: Actuator whose resistance value decreases at resonance frequency
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DRV8824: DRV8824 & DRV8825 THERMAL DATA
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DRV8832: DRV8832: No "Fault' report during a stall condition
Part Number:DRV8832
Hi James,
Nice to meet here!
Question related to Vilim & “Fault” report, need your helps.
As you described, “the device must hit the Vilim threshold for every PWM cycle within the 275 ms time frame for the fault to report (this is the tilim spec)”, from which can deduce that the voltage of Risense during stall status should present the waveform like as PWM cycle. The following scope waveform is captured from problem which cannot trigger “fault” report. But it likely meet the requirement you described.
"Hit the Vilim" means the high level of the votage of the Risense must be more than 200mv, regardless of low level of the voltage. Could you help elaberate the process of trigger "Fault" report? Recently, encoutering the problem: no "fault" report duing a stall condition. It's urgent for us to solve.
Best regards,
Qingfeng, Yuan
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DRV8412: DRV8842 minimum motor voltage
Part Number:DRV8412
Hello,
we have to design a stepper motor driver for a two phase motor which has winding resistance of 1 Ohm and operating voltage of 2.4 Volt.
Among the vast variety of driver ICs offered by Texas, is DRV8412 suitable? Is it the best choice? In order to reduce driver dissipation (DRV8412 has 0.1 Ohm ON resistance) bridge mosfets could be paralleled, but still with significant internal dissipation.
Many thanks
Vasco
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BOOSTXL-DRV8305EVM: High voltage BLDC driver
Part Number:BOOSTXL-DRV8305EVM
Hi,
I will need to design a controller of high voltage BLDC. I have purchase the BOOSTXL-DRV8305EVM and LAUNCHXL-F28027F evaluation board to make use of the FOC to control my motors. I am used to the FOC but now I will need a 200VDC controller to control higher power motors. I am planning to use 80V battery to power my motor but just to provide future potential of driving higher power motor, I am going for a 200VDC controller. I have looked through the TI's brushless DC motor drivers but none are capable of up to 200VDC.
note that :
1) I am planning on using the LAUNCHXL-F28027F design.
2) I am a beginner at design BLDC controller.
3) I am designing 200VDC rated BLDC controller.
My questions are:
1) From the reference design BOOSTXL-DRV8305EVM, if I replace DRV8305 three phase driver with 3 half bridge UCC27714 and design my own current sense, will the FOC still work? The FOC is really easy to use, but I am not sure if it will work for any kind MOSFET drivers.
2) The FOC provide feedback speed information. Is the information calculated from the voltage sense and current sense?
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Motor Driver with voltage booster
Hi, i am working with battery powered water flow controller project and i listed the hardware part my design in below,
1. 6V rechargeable battery,
2. IR Transceiver,
3. 8pin microcontroller,
4. TI L293 DIP-16 Motor driver,
5. 9V Latching solenoid,
For this design we directly power all logic circuit including microcontroller except solenoid because solenoid controlled through L293 by 30ms and 40 ms latching pulse. To latch and unlatch the solenoid we are boosting voltage from 5V to 9V through voltage booster circuit. This all circuits makes bigger design also in high cost to make it compact "we need motor or solenoid driver which contains option of driving and voltage booster". I checked the online but i got on part details about DRV8808 but it is too much big but we need voltage booster with h-bridge driver kindly give your product support.
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DRV8847: DRV8847 break down due to induced EMF
Part Number:DRV8847
Hi Team,
My customer has a issue as below:
1. DRV8847 is used to drive a BDC and two air valve with independent H bridge as below.
2. When the system was power-off, using hand to rotate the BDC, it got 35V peak induced EMFand the device broke down (VM-GND impedance is 0) . test points were OUT1/OUT2 - GND, waveform as below.
3. so the question is does OUT1/OUT2 can only sustain maximum voltage @ 18V (which is the max stress of the power supply)? How we can solve this issue?
Thanks a lot
Yang
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DRV10983-Q1: DRV10983-Q1 :Equation motor velocity constant at Full load for delta or star conection BLDC motor
Part Number:DRV10983-Q1
Hi All
Pls help me , I need to know equation is below support delta or star connection of BLDC motor .
refer DRV10983-Q1 tuning guide (SLVUAV9 ).
Motor velocity constant = ( Vcc-(Maximum current X resistance X Sqrt (3))) / maximum motor speed (full load )
Bestregard
Prarinya
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DRV8872: nFault Signal active when iTrip is reached ?
Part Number:DRV8872
Is the nFault signal active when ITrip is reached or only when one or more Protection features (UVLO, OCP, TSD) are active ?
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DRV8323: seperate supply for DRV8323
Part Number:DRV8323
DRV8323 cannot drive normal Level FETs in case the DC link has gone down to e.g. 7V
What would happen in case we would build in a step-up Converter to Supply the IC with minimum 13V?
In that case we would have enough Voltage to allow operation of the normal Level FETs.
But then we have the problem that the PIN VM of the IC is higher than the PIN VDRAIN.
è Will it cause some issue e.g diodes conducting in the Chip
è Will VDC monitoring work?
(Please visit the site to view this file)
Best wishes,
Olrik
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DRV11873: loss of lock
Part Number:DRV11873
There is however an issue I’ve experienced during our tests - the DRV11873 consistently enters into a false locked rotor state beyond a certain motor speed, regardless of the Vcc voltage and motor current draw. I’ve come across an application note (attached) on the Ti website detailing this particular problem, relating to the internal sampling frequency of the DRV11873. Some workarounds are suggested in the document, however none of them are suitable with our application.
I understand it has been sometime since we purchased the EVM boards, so I’m wondering whether you’re aware of any revised versions of the DRV11873 devices that have been released since? If not, I would be very grateful if you could put me in touch with someone who would be able to help. Your assistance with this matter would be invaluable as I am very much a fan of Ti!
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UC2625: UC2625 Average Current Sensing
Part Number:UC2625
Hello,
I'm looking to implement average current sensing with the UC2625 because using the pulse-by-pulse sensing seems to be limiting the needed in-rush current to my motor.
I see that Figure 8 in the datasheet states Figure D (shown below) can achieve average current sensing with the addition of the diodes and R_D. In my schematic below I've added the 6 low-side circulating diodes and extra current sense resistor. The rest of the circuitry minus this addition has been tested and verified without these extra components.
I have two questions:
- Is this a correct implementation of what the datasheet is referring to? I'm having trouble seeing how this will allow average current sensing.
- will this now allow the motor to receive the in-rush current that it needs?
Thanks in advance for the support!
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DRV8323: Truth Table for 3x PWM Mode
Part Number:DRV8323
Hi,
GHx and SHx output "high" and GLx outputs "low" even if setting INHx and INLx to low when setting ENABLE pin from low to high and changing PWM mode from "6x PWM mode" to "3x PWM mode" via SPI interface with DRV8323S after power-on.
So, could you please tell me how to place SHx in Hi-Z when setting INHx and INLx to low as the following table 3 ?
Best regards,
Kato
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BOOSTXL-DRV8323RH: CAL, ENABLE pin connection?
Part Number:BOOSTXL-DRV8323RH
Hi,
I have a question about hardware interface.
How Should I connect those pins(CAL, ENABLE, DIR, BRAKE, FAULT) with MCU?
CAL, ENABLE, DIR, BRAKE pins are input and FAULT is output.
Q1) Is it need pull-up resistor or pull-down resistor?
Q2) If I use two DRV8323 with one MCU, ENABLE and CAL pins can be shared?
Q3) If CAL pin is not used, how can it designed? (no connect or pull-down?)
Thanks.
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DRV10983: technic for parameterless motor driver
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DRV110: DRV110 Accuracy
Part Number:DRV110
The datasheet does not specify accuracy of the current regulation when using external setting components. Also, the datasheet does not specify the accuracy of Tkeep. Is more information available?
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