Motor drivers forum - Recent Threads

DRV8323: DRV8323 Vds Monitor Blanking Time

Mike Demsher — Mon, 10 Aug 2026 21:02:45 GMT

Part Number: DRV8323

I asked a previous question about how the Vds monitors on the DRV8323 work. Specifically, I wanted to know if the high side Vds monitors turn on immediately when the high side gate starts charging, or if there is some kind of delay. I received an answer that there is a "blanking" time before the high side monitor turns on; however, that information (and the length of that blanking time) wasn't available in the data sheet.

Is there anywhere I can get information on the exact blanking time of the DRV8323?

Thanks,

Mike

DRV8334EVM: DRV8334EVM Fault Status

Jarett Chaine — Mon, 10 Aug 2026 20:33:21 GMT

Part Number: DRV8334EVM
Other Parts Discussed in Thread: DRV8334, LAUNCHXL-F280049C

Hello, I recently purchased the evaluation board for the DRV8334 chip and upon power up I noticed the fault led immediately turned on, which I learned is normal until you pull it out of sleep mode. I am powering the device with a 24V power supply with the current being limited to 300mA (as advised for first time turn on). I am using the DRV8334_Sensored_Trapezoidal_GUI and I am unable to clear the faults. The device connects and flashes the Launchxl-f280049C, but when I toggle nSLEEP to wake up, nothing happens and the fault indicator remains red. I am curious on what steps can I follow to troubleshoot the device as I don't want to potentially damage any subcircuits. It is worth mentioning that I haven't changed the default connectors on J1, J6 and J7; that is, the buck regulator is powered on and supplying the 3.3V rail and the DRV8334 chip is receiving PVVD from PVVD_buck. Thanks in advance for any advice on troubleshooting.

DRV8214: i2c pull-up values FAST/STANDARD clocking rates

Tim Netherwood — Mon, 10 Aug 2026 13:38:35 GMT

Part Number: DRV8214

Hi Team,
Given that there is a pull-down resistor internally on SCL (whose value is unknown?) can we increase the SCL external pull-up 2.2K resistor to minimise current drain and is such an increase limited by the FAST/STANDARD i2c clocking rates.

Thanks

DRV7167: Availability and mass production

Sharath Kumar Selvaraj — Mon, 10 Aug 2026 12:17:34 GMT

Part Number: DRV7167

Hello Team,

I am working as Hardware developer in Hilite GmBH. We are trying to develop GaN based BLDC acctuators and find DRV7167 very interesting. Can you please let me know the current availability since when I tried to order 10 sample I was not able not, please let me know the procedure to order the component now (or provides samples if that is possible) and also about when the part will be available for mass production.

MCF8315A: I2C connection not establishing

Javal Gadher — Mon, 10 Aug 2026 12:09:24 GMT

Part Number: MCF8315A

We are currently facing an issue while attempting to interface the MCF8315A on our custom board with the MCF8315A EVM.

We have established the connection using jumper wires for SCL, SDA, and AGND. However, the MCF8315A IC is not being detected by the Motor Studio GUI.

To troubleshoot, we have verified the following on our end:

Power Rails: Checked AVDD and DVDD; both are within the proper operating range.
Communication Lines: Probed the SCL and SDA signals using an oscilloscope. The waveforms appear normal.

Could you please advise on what might be causing this detection failure or suggest further debugging steps?

DRV8145-Q1: DRV8145SQRXZRQ1

Gilberto Ermacovitch — Mon, 10 Aug 2026 11:55:41 GMT

Part Number: DRV8145-Q1

We are using two DRV8145SQRXZRQ1s in a full bridge configuration to drive a DC motor. After a period of operation, one of the DRV8145SQRXZRQ1s started displaying a persistent TSD alarm. This fault appears during the startup sequence. The FAULT_N pin remains at zero and is not cleared by the CLEAR FAULT command. The FAULT_REGISTER register shows that the TSD flag is set.

Any possible reason for this failure?

Gilberto

MCF8329A: Communication

Dhivya S — Mon, 10 Aug 2026 11:31:35 GMT

Part Number: MCF8329A

Dear TI Team,

We have customized our own PCB which has ATmega2560 as the microcontroller and MCF8329A as the IC, Now with our own GUI, we need to communicate with our board, kindly explain the commands, communication protocols happening in the background and the related registers needed to spin the motor in clockwise and anticlockwise direction, start and stop.

Thankyou

DRV2700: IC recommendation for 100 kHz piezo atomizer driver

Den L — Mon, 10 Aug 2026 11:30:01 GMT

Part Number: DRV2700
Other Parts Discussed in Thread: TUSS4470, DRV2911, DRV2901,

Hi TI team,

We are developing a driver for a piezo mesh atomizer with:

Resonant frequency: 100 ± 5 kHz
Maximum drive voltage: 80 Vpp

We are looking for a TI IC or reference design that supports:

~100 kHz or higher operation
adjustable frequency
ideally automatic resonance tracking
an evaluation board for testing

We found the TUSS4470, but are unsure whether it is suitable for continuous atomizer drive.

Could you recommend the most appropriate TI IC/topology for this application?

MCF8329HS-Q1: Question about default offset

Chase Jeong — Mon, 10 Aug 2026 09:17:32 GMT

Part Number: MCF8329HS-Q1

Dear TI experts,

Could you check that the offsets of GATE_DRIVER_FAULT_STATUS is 0h and CONTROLLER_FAULT_STATUS is 2h?

I am asking it because if my customer read this offset, it is read as fixed value.

So I need to check it is not 0h -> E0h and not 2h -> E2h.

Please check this issue. Thanks.

Best regards,

Chase

MCF8329HS-Q1: Question about ISD_SPEED and FG_SPEED_FDBK

Chase Jeong — Mon, 10 Aug 2026 08:48:05 GMT

Part Number: MCF8329HS-Q1

Dear TI experts,

Could you explain the difference between ISD_SPEED and FG_SPEED_FDBK?

I think these 2 registers are about measuring motor speed, but I cannot see specific differences.

and,

If these 2 registers are different, Does ISD_SPEED have some register which is related to BEMF like FG_BEMF_THR?

Best regards,

Chase

MCT8316A-Q1: Please review the schematic of MCT8316A1VQRGFRQ1

Chase Jeong — Mon, 10 Aug 2026 06:16:11 GMT

Part Number: MCT8316A-Q1

Dear TI experts,

My customer made their schematic using MCT8316A1VQRGFRQ1. Could you review this schematic?

MCT8316A-Q1_sch.pdf

Best regards,

Chase

DRV8462EVM: Stall detection

Jeffrey Chung1 — Mon, 10 Aug 2026 02:26:41 GMT

Part Number: DRV8462EVM

Hi Team,

Customer is verifying DRV8462EVM and asked me about quick stall detection. Please check the file below and let me know TI solution.

Stall detection.pdf

Regards,

DRV8305: DRV8305NEPHPRQ1 Recovery After Power Undervoltage / Power Interruption

CHARLES HOWARD — Fri, 07 Aug 2026 20:24:26 GMT

Part Number: DRV8305

Hello,

I am using the DRV8305NE with an external 3-phase MOSFET bridge controlled by a dsPIC33EP128MC504.

I am investigating fault recovery after a power interruption or undervoltage event. During testing, Power drops below the operating threshold and later returns to normal.

My questions are:

Is it necessary to toggle EN_GATE low then high after Power recovers? It seems recommended.
Is a complete SPI register reinitialization required after Power recovery? If not is the RAM correupted?
Are gate-driver registers guaranteed to retain their programmed values during a Power interruption?
What is the recommended recovery sequence to ensure the charge pump, gate-drive circuitry, and fault logic are fully reinitialized?
Are there known conditions where SPI communication appears valid but the gate driver remains disabled?

Current configuration:

DRV8305NE
12-V automotive actuator application
External N-channel MOSFET bridge
SPI interface operating normally before the event

Any recommended recovery timing diagrams or reference implementations would be appreciated.

Thank you. Charles

LMR36503-Q1: Vreg Question

Russell Peterson — Fri, 07 Aug 2026 18:28:55 GMT

Part Number: LMR36503-Q1

What is the country of origin for the Texas Instruments Voltage Regulator pn LMR36503-Q1

DRV8300: High-Side Gate Output (GHx) Not Switching During Bench Test (Single-Phase 4-Switch Inverter)

Josel Go — Fri, 07 Aug 2026 15:48:33 GMT

Part Number: DRV8300

Hi Experts,

I am using the DRV8300 gate driver( 20-pin) currently i am drving the single phase inverter(4 switch and resistive load) but top side gate pulse is not comming it is continues signal with spike as atached in image (green waveform ). however bottom siwtch is generating proper gate signal.

Regards,

Josel

MCF8315A: EVM board new MCF8315C IC change

hemanth chokkapu — Fri, 07 Aug 2026 13:26:27 GMT

Part Number: MCF8315A

After replacing the damaged MCF8315A IC on the MCF8315A EVM board with a new device, the hardware appears to be functioning correctly. All the required supply voltages, including AVDD, BUCK, and DVDD, are present and within the expected range.

However, the D6 LED continues to blink continuously, and communication with the MCF8315A cannot be established. When attempting to program or configure the device, the GUI displays the following error:

"Unable to write. Please check the connection."

Could you please explain the possible reasons for this issue and suggest the appropriate troubleshooting steps or solution?

DRV8212: EMI issue

Jeff YANG — Fri, 07 Aug 2026 09:26:32 GMT

Part Number: DRV8212

Hi,

We are using this IC (DRV8212DSGR) to drive a motor, which is connected to the IC's OUT1 and OUT2 pins.
We have observed EMI emissions in the 75 to 170 MHz range on the spectrum analyzer.
Do you have any schematic or PCB design recommendations to address this issue?

Thanks!

Jeff

DRV8434A: How to adjust DRV8434A decay mode ?

user6150974 — Fri, 07 Aug 2026 02:46:15 GMT

Part Number: DRV8434A

The DRV8434A product page on the TI website (https://www.ti.com.cn/tool/cn/DRV8434AEVM) mentions that the device supports adjustable decay modes, including Slow Decay, Mixed Decay, Smart Tune Ripple Control, and Smart Tune Dynamic Decay current regulation schemes. However, I could not find any information about adjusting the decay mode in the DRV8434A datasheet. Could you please provide guidance on how to adjust the decay mode for this device? Thank you.

DRV2605L-Q1: RTP mode function check

Hanbing Xiao — Thu, 06 Aug 2026 15:18:20 GMT

Part Number: DRV2605L-Q1

Hi team

Customer is using RTP mode of DRV2605L-Q1. But they find the vibration performance is not that good.

Could you please have a look?

Below is the motor datasheet.

BLM0512QA-FP181-0SU.pdf

Below is their register configuration.

Below is the output waveform

Could you please have a look and give some suggestion?

Hanbing

MCF8329HS-Q1: EEPROM write operation

Yoshikazu Kawasaki — Thu, 06 Aug 2026 10:45:37 GMT

Part Number: MCF8329HS-Q1
Other Parts Discussed in Thread: MCF8329HSRRYEVM, MCF8329A-Q1, MCF8329HS, MSP430FR2355, MOTORSTUDIO

Hello,

My customer has been struggling on EEPROM write operation on MCF8329HSRRYEVM. Would you please give me your comments for these?

The datasheet says how to write data to EEPROM on page 82, but my customer can't succeed even if they do the same. If I look at the E2E posts on MCF8329A-Q1, I found similar issues and one of them says the application note (www.ti.com/.../slla664.pdf). Does it apply to MCF8329HS -Q1 as well? What would be the reasons why my customer can't write EEPROM even they did power reset?
My customer would like to know how to write data to EEPROM on their boards using the MCF8329HSRRYEVM as well. I think they can do that just like MCF8329A-Q1 does as shown on top page of sllu383a. Would you please tell me exactly how to do that?

Best Regards,

Yoshikazu Kawasaki

DRV8145-Q1: Can I control nSLEEP and DRVOFF(invert) with one signal or connect DRVOFF to GND

Harvey Nie — Thu, 06 Aug 2026 10:03:46 GMT

Part Number: DRV8145-Q1

Hi Ti expert,

In my design (DRV8145-Q1 HW Variant ), off-state diagnostics are disabled, I want to control nSLEEP and DRVOFF(invert) with one signal. But here is needed a reset pulse during wake-up process. I assume it would not affact my software design logic, I don't need standby mode. Or should I connect DRVOFF to GND and only control nSEPLE? Could you give me some advice? Thanks.

Best regards,

Harvey

UCC28180: UCC28180 CCM PFC (1.5kW, 135kHz) – Gate Driver Requirement & Parallel MOSFET Advice for CoolMOS C7

Rahul Patil — Thu, 06 Aug 2026 09:37:00 GMT

Part Number: UCC28180

UCC28180_Driver.docx

DRV8705S-Q1EVM: Request about feasibility of specific operation of DRV8705S

Mahfoudh Bou — Thu, 06 Aug 2026 08:54:10 GMT

Part Number: DRV8705S-Q1EVM

Hello,

We would need your technical support on a TI product: The gate driver: DRV8705S-Q1.(SPI)

*The driver is used to manage two external N-Mosfets (High Side: HS & Low Side: LS): (RDSON=3.3 mΩ) in split HS and LS configuration (with a low side shunt current resistor of 3mΩ) to control a heater load of 2Ω resistance.

**Vbattery=13.5V

*Question:

Is it possible to activate via SPI only the high-side NMOS and not the low-side NMOS , or to activate only the low-side and not the high-side? Will there be any errors related to VGS and VDS reported by the driver? If it's feasible, what operating scenario/configuration should be chosen to ensure operation without driver error reports?

MCF8329EVM: MCF8329A EVM Not Connected

Katsumi Kumazawa — Thu, 06 Aug 2026 08:49:43 GMT

Part Number: MCF8329EVM
Other Parts Discussed in Thread: MOTORSTUDIO,

I supplied 24V to the MCF8329EVM, connected it to my PC via USB (it was recognized as a USB Serial Port (COM5)), and launched MotorStudio v0.1.36, but it wasn't recognized.

The speed/wake pin on connector J9 was 3.3V.

Please tell me how to resolve this.

DRV8714S-Q1EVM: Continuation of DRV8714S-Q1EVM: SO#545947

Kent Liew — Thu, 06 Aug 2026 07:47:05 GMT

Part Number: DRV8714S-Q1EVM

Hi Murugavel,

Good day.

The customer said that "This board is brand new; it was unusable from the start, not after a period of normal use." They tried again based on supplier's response last time but it still was not working. Attached videos for your references.

Kindly please review and advise.

Thanks.

Regards,

Kent