DRV8830 current limit
HelloI have a problem with the current limit circuit of the DRV8830. In order to simplify the problem I have connected the output of the drive on a variable resistor Rload. The drive is powered with a...
View ArticleDRV8308 EVM - speed control
I'm using DRV8308EVM with GUIComposer (DRV8308EMV_GUI v1.1) in combination with a 3-phase BLDC motor (1 magnetic pole pair)The "PWM Modes" works all fine. In the "Clock Frequency Mode" I'm able to...
View ArticleClik here to view.
DRV8828EVM / Decay mode Frame
Hi Team, I'd like to ask about GUI of DRV8828EVM.I think selection of ①/② and ③ are both selection of "Decay Mode", so I think these are overlapped.What is the purpose of selecting ③(Decay Mode Frame)...
View ArticleDRV8834 Pinout query
Hi All,I am using part DRV8834 in one of my application,I have below query,Refer Figure 11 of the DRV8834 datasheet. What is the function of Coil A Enable and Coil B Enable. Can this be used to power...
View ArticleDRV8412 without PWM
Hello,I want to drive two brushed DC motors (about 3A RMS each) using DRV8412 with basic left/right/stop control, no PWM. There is a section in the datasheet named "Bootstrap Capacitor Under Voltage...
View ArticleDriving Stepper Motors
HiI am working on a new industrial control and using the TLC5940 to drive a 2-digit, 7-segment display which works OK: I am also considering driving 3 small stepper motors (current draw about 100mA...
View ArticleDRV8841 and DRV8843 Full Torque function at Half Step driving
HiMy customer is considering the motor driver, they're the candidate of ON-Semi LV8702V.LV8702V: http://www.onsemi.jp/pub_link/Collateral/ENA2121-D.PDFThey need Full Torque at Half Step driving as most...
View ArticleAnyone Knows about a high speed stepper driver from ti?
Hello Everyone,I am using DRV8711 for driving my stepper motors. I am able to successfully rotate the motor at a speed of max 800 RPM. I want a driver which can drive my motor at even higher speed. So...
View ArticleDRV8307 Using Motor > 32V
I am wondering if it is possible to use the DRV8307 with a motor >32 VDC.I would like to use a BLDC motor driven at rectified 230 VAC (nominally 207 VDC).The external switches (preferably IGBTs)...
View ArticleClik here to view.
Modification of DRV8301-69M-KIT Voltage Feedback Circuits (Its VdcBus_kV...
Hello, I would like to modify the voltage feedback circuits on DRV8301-69M-KIT to fit the voltage range for my DC24V Motor.I understand that Originally DRV8301-69M-KIT is set to operate DC48V motor...
View ArticleClik here to view.
DRV8825 Current Glitch
Hi, I'm having a problem with the DRV8825 that I don't understand. In the plot plot below, you can see phase A and B currents and also the step signals. The IDLEY signal isn't important. The DECAYY...
View ArticleClik here to view.
DRV8813 / about parasitic diode of internal FET
Hi Team, My customer put Zenor Diode on VM to prevent VM rising because the phase current could be charging back the supply(VM) when the motor is running along with huge mechincal vibration. In this...
View ArticleClik here to view.
PMSM rotor position estimation with Sliding mode observer
In ti application document,they use Sliding mode current observer to estimate rotor position.Sliding Mode Current Observer equations as follow Z=k*sign()Then the document says that"Estimated back emf...
View ArticleDRV11873 - Motor stops around 7200rpm
Hello,My customer has a question about DRV11873.[Q]They want to use the device to control the motor at around 7200rpm,but the motor always stops at around 7200rpm.It can control the motor at around...
View ArticleBOOSTXL with hall effect magnetic sensor possible?
I'm looking at the BOOSTXL / LaunchPad board and was wondering if the voltage input on the BOOSTXL board can be used for HALL sensor signal as well? If not, can someone recommend for small...
View ArticleDRV8711EVM - MSP430 source code
anybody have source code for msp430 mounted on this board ?
View ArticleDRV 8432
Hi Ryan, we are using the PWM Motor driver DRV 8432 for motor controlling (DC-motors 24V/100VA) in a door control system for railway equipment.The following question is safety-related important:Is...
View ArticleDRV8711EVM output pulse width too narrow
We have built a new 2-phase motor and are having problems using the DRV8711EVM board to control the motor. We're getting very narrow 5us pulses with a duty cycle of 18% (37kHz) out of the DRV8711EVM...
View ArticleDRV8805 APPLICATION CIRCUIT
Hello,Could you please provide the application circuit for DRV8805?
View ArticleDRV8301 Default value of control register
HiMy customer is using DRV8301. He want to know default value of control register.Could you tell me the default value of following register. - GATE_CURRENT <- 0x00 or 0x01 or 0x10 or 0x11? -...
View Article