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DRV8306: after some actions DRV8306 damaged means nBRAKE and PWM and DIR pin connect to GND

December 15, 2019, 10:06 pm
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Part Number: DRV8306

I asked my question in https://e2e.ti.com/support/motor-drivers/f/38/t/863824 but my problem is not resolved yet.

I want to know is it a common problem in DRV8306?

in the datasheet mentioned this pin pull down with 100k resistor. it seems strange result that I see after some efforts this pins connect to GND. it's ok at first but after long test this problem happened. power supply of IC is 24V and I have 5V enable and PWM,DIR and BRAKE have 3.3V in high logic with iso742. Vds and IDRIVE are HI-Z..

if anybody had a same experience I would be grateful know about it.

best wishes 

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DRV3245Q-Q1: DRV3245Q-Q1 Datasheet

December 11, 2019, 12:26 am
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Part Number: DRV3245Q-Q1

I am looking for the complete data sheet for DRV3245-Q1. Could you share it?

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DRV8873: DVDD Maximum current

December 16, 2019, 9:57 am
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Part Number: DRV8873

Dears,

Need to supply few parts with the DVDD internal regulator.

Have seen 2 op-Amp on the dev. board  supplied that way for a total of 1.1mA.

What's the maximum current that can be sourced from the DRV8873H DVDD Pin?

Regards,

Olivier Schrevens

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DRV10975: Failed to update DRV10975 EEPROM

December 16, 2019, 6:13 pm
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Part Number: DRV10975

Hi Team,

The customer designed a brushless motor driver board using DRV10975, and the parameters in the EEPROM need to be modified. Referring to Figure 7 in the SLVUAA5 document, he used the IIC command to modify the value in 0X20, and the modified value was displayed when read after modification. After the power is turned on, the value in the address returns to the default value. Power supply voltage is 22.5VDC.

Thanks.

Annie

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DRV2511-Q1: Question about gain

December 16, 2019, 9:34 pm
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Part Number: DRV2511-Q1

Hi all,

I have a question about the gain. Is this parameter for voltage, for example the constant input of IN+=2.5V and IN-=2.4V makes the average of OUT+ - OUT- = 1V by PWM if gain setting is 20dB?

Regards,
RYO

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DRV8873SEVM: Drv8873S software driver issue

October 28, 2021, 1:27 am
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Part Number: DRV8873SEVM

Hi team,

1. After the SPI is written to the register, the motor stops only after 1-minute driving, and the data returned by SDO is a fixed round-back. The customer would like to know what's the reason for that and is there any files for reference.

2. For SPI drive, write registers IC1:0X0445;IC2:0X06EC;IC3:0X0840;IC4:0XC01C Return value: 0X4051;0XC00C;0XC040;The chip no longer outputs after 0X4000. What's the problem?

Could you please help to check this?

Thanks!

Best Regards,

Cherry

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DRV3245Q-Q1: DRV3245Q-Q1

October 28, 2021, 2:20 am
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Part Number: DRV3245Q-Q1

In the datasheet 8.3.5.5 it  describle"The DRV3245Q-Q1 contains integrated three-phase comparators, each of which monitors the motor phasebbvoltage at the SHx pin against the supply voltage at the VDRAIN pin. Each comparator is switching at 75% and 25%, or 50% of the VDRAIN voltage." I have confused. I want to ask how does  the DRV3245CQPHPRQ1 internal module " Phase Comparators " works? Could you provide some relevant examples or calculation design documents for reference?

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DRV8873: HPWPR

October 28, 2021, 2:42 am
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Part Number: DRV8873

Hi team,

The customer has the following questions:

1. During the test, the chip was always broken occasionally and could not be used again. Please help to analyze whether there was a problem in the peripheral circuit design.

2. During the test, it was detected that the surface temperature of the motor drive chip reached 91℃. Is the temperature inside the chip already overheated? And cause chip damage

3. pwm_out1 is the control PWM output by MCU, and pwm_back is the PWM returned by the motor drive chip. In the test process, when pwm_out1 is 100% duty cycle, the maximum load current is occasionally 5A, generally about 4A. However, the overcurrent protection threshold is set to 6A. In this case, the nfault2 foot is pulled down by about 70ms in a cycle.This will not damage the chip because of overcurrent protection too many times.

Could you help to resolve the case? Thanks!
Best Regards,
Cherry
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DRV8718-Q1: Could you please help to provide us the reference schematic design

October 28, 2021, 3:36 am
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Part Number: DRV8718-Q1

Hi team,

My customer Yanfeng Technology is evaluating our DRV8718SQ1 and I have applied EVM for them, while we do not see the typical application reference schematic design. Could you please help to provide us some DRV8718Q1 typical application and schematic for customer reference? Since there are some parameters values are missing and we may need some detailed typical schematic design for customer use, so we need your help for this, thank you very much!

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DRV8323R: Motor making sound noise

October 28, 2021, 4:21 am
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Part Number: DRV8323R

Hello,

We are using DRV8323RS with 1 PWM mode. From our design we are able to run a BLDC motor, but from the same design we are running a different BLDC motor then it is running but it is making sound noise. And we have noticed one more thing, for the same duty cycle of PWM there is speed difference of around 10-20 RPM in Clockwise and anticlockwise and sound difference is also there. 

So, what parameter I can change for Resolving this issue?

For your reference I am attaching Phase waveform image and video of rotating motor.

Thanks in advance

Regards

Imran Aftab

e2e.ti.com/.../WhatsApp-Video-2021_2D00_10_2D00_11-at-9.15.27-PM-_2800_1_2900_.mp4

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DRV2625: Current consumption

October 28, 2021, 4:41 am
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Part Number: DRV2625
Other Parts Discussed in Thread: DRV2605L,

Hi Team,

I would like to know the current consumption when active.

In DRV2605L, I(BAT_AV) is mentioned.

Please let me know the value under similar conditions.

Best Regards,

Kenji

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DRV8803: OCP fault

October 28, 2021, 4:50 am
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Part Number: DRV8803

Hi Team,

The customer are using DRV8803 in one our project for low side drive to control fan and recently found the system shows fault error .Based on the datasheet tocp deglitch time 3.5microsec.

Can you help to explain on peak /rms current duration ? They are driving 2 fans in each chip with fan rated current 560mA.

Please reference the fan for peak current waveform and schematic as below. It seems the fault not trigger even peak current 2.52A for 560microseconds. Thank you.

 

Best regards,

Mike

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Alternative to Allegro part number A3938

October 28, 2021, 5:43 am
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Other Parts Discussed in Thread: DRV8306, MCT8316A

Would you be able to recommend a best-fit alternative to Allegro part number A3938? We are using the REF input on the A3938 to control the motor, versus the PWM input. So that method/feature of setting the load current would be essential to minimize software impact.

I evaluated the DRV8306 but it does not have that current control feature.

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DRV8350H-EVM: The MSP430 development board is properly debugged online, but each time the emulator is powered up, reset is required to operate, or the SBWTDIO (EZFET_SBW_RST) interface is touched by other development board interfaces, the program can run a

October 28, 2021, 8:16 am
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Part Number: DRV8350H-EVM
Other Parts Discussed in Thread: MSP430F5529, LP-MSP430FR2476, DRV8350,

I have developed a new board used to driver BLDC, It mainly used DRV 8350  and  MSP430F5529,  but I don't use the onboard emulator but use the EZ_FET emulator from LP-MSP430FR2476 DEVEOPMENT kit. when debugging ,I only use the SBWTDIO / SBWTCK  and  GND. During Online debugging it is normal ,the motor can run as I want ,everything is ok. but after disconnect  EZ fet emulator, and repower the board, The board needs to RESET to run. Why?

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DRV8830: Drive status during a stall condition

October 28, 2021, 8:48 am
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Part Number: DRV8830

Hello,

In the datasheet of the IC in question (DRV8830) we have section 7.3.3, specifically bellow quoted paragraph which describes the driver behaviour during a stall event.

If the current limit condition persists for some time, it is likely that a fault condition has been encountered, such as the motor being run into a stop or a stalled condition. An overcurrent event must persist for approximately 275 ms before the fault is registered. After approximately 275 ms, a fault signaled to the host by driving the FAULTn signal low and setting the FAULT and ILIMIT bits in the serial interface register. Operation of the motor driver will continue

It is unclear to me though if the driver remains functional, thus pumping current into the DC motor, after the stall event is detected.
The last afirmation "Operation of the motor driver will continue."  seems to indicate so, but does it refer to the driving stage (H-bridge) being automatically switched-off after stalling detection occurs?

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DRV110: Out pin duty cycle less than 1%

October 28, 2021, 10:36 am
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Part Number: DRV110
Other Parts Discussed in Thread: UCC37322

I'm using the DRV110 in a design to drive a 120VDC solenoid in Peak and Hold operation.

When I increase the I_hold set point, the OUT gives me something that I don't expect: A long pulse followed by many very short pulses (less than 1 us) at 20kHz.

Is there a reason for this duty cycle of less than 1%  It does not seem to agree with the datasheet.

In the pictures below, yellow is OUT and Green is the voltage between the solenoid and Mosfet as shown in the schematic below

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MCF8316AEVM: connetivity

October 28, 2021, 5:05 pm
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Part Number: MCF8316AEVM
Other Parts Discussed in Thread: MCF8316A

Hi, support team

My customer has the questions as follow:

when I try to connect it goes out and tries but comes back with "cannot read address 0x20AA" then disconnects.
What can I do? It seems like the 430 isn't wanting to talk. D6 is red
the other side of the board shows a fault LED. D2


Thanks so much.

Best regards,
Yuki

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DRV8428: symbol, footprint, 3D modeling

October 28, 2021, 5:23 pm
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Part Number: DRV8428

Hi,

Could you provide symbol, footprint, 3D modeling of below devices?

DRV8428PPWPR, DRV8425PPWPR, DRV8426PPWPR

Thanks.

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DRV8320: Recovery time of nFault pin .

October 28, 2021, 6:53 pm
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Part Number: DRV8320

Hi team,

I'd like to know about the recovery time of nFault pin.

In the case of the auto-recovery fault such as UVLO,
how long does it take for the nFault pin to be Hi-Z after the state is restored?

Sincerely.
Kengo.

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UC2637: Looking at Design Files and Wondering...

October 29, 2021, 12:42 am
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Part Number: UC2637
Other Parts Discussed in Thread: TIDA-00320,

Hello,

I currently have a UC2637N and I was looking at the datasheet. I found this photo/diagram:

...

Now...I was thinking that this driver could be used as is/without another motor driver. Is this a fact or was I confused?

And where it states in the photo/diagram "Speed Control," am I supposed to supply a knob of some kind or is that just referencing what it actually is doing?

Seth

P.S. I am trying to use this driver, the UC2637N while testing, w/ a BeagleBone Black or other familiar board from beagleboard.org. 

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