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DRV8350: Therman Pad connect to GND?
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DRV3245Q-Q1: SPI faults: clk and addr. Looks fine on oscope.
Part Number:DRV3245Q-Q1
Hello!
I have been helping a customer debug DRV3245 issues. They are seeing a SPI_clk_fault somewhat randomly. I asked them to rewrite the program so that it would read the 0x01 then read IC Status 2 register repeatedly until a fault occurs. When the IC Status 2 register changes a trigger happens (ch4) so that we can capture it on the oscope. In the picture below you can see that there was a SPI_CLK_FAULT triggered by the read of 0x01 but if you count the clock pulses there are 16 so doesnt seem like the fault should trigger...not to mention that the DRV3245 returns responses even though there is a supposed SPI fault.
Then sometimes we see a SPI_ADDR_FAULT and SPI_CLK_FAULT occur like below. Again the DRV3245 returns with a response but the fault is triggered even though it looks the same as the other times the read occured:
We also checked chip select to make sure there was nothing weird going on and that looks fine too. Two pictures below - first is zoomed out and the second is zoomed in on CS to check timing:
I'm out of guesses at this point it does seem to throw a fault randomly even though nothing looks wrong with the communication. Any guidance is appreciated!
Regards,
Kevin
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DRV8873-Q1: EMC
Part Number:DRV8873-Q1
Customer asked if "TI has a recommended output protection scheme that will ensure DRV8873 passes CE mark immunity testing (EN60730)? Surge, ESD, EFT, etc.”
I did point out that the “DRV8873 integrates a spread spectrum clocking feature for both the internal digital oscillator and internal charge pump. This feature combined with output slew rate control minimizes the radiated emissions from the device.”
Please advise.
Thanks,
Mark
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DRV10983: DRV10983-Q1
Part Number:DRV10983
Hi,
I have a PCB that uses the DRV10983-Q1 chip. The Motor rotates when VCC and GND are applied. But the RPMs is probably in the 10-15 range instead of the expected 30,000 RPM. Changing the Vcc between 6.2V to 12.3V causes the motor rotation speed to change but the rotation is again in the same range as above. My guess is that the SCL, and SDA pins (i.e. I2C pins for the chip) have to be set using the GUI interface for the chip. Is that correct? Need help or input.
Also after downloading the DRV109xx EVM on my desktop, the tool invokes the user to download LVRTE2014f2std.exe (i.e. Unable to locate the LABVIEW Run-Time Engine executable even though it has been downloaded in the same folder). After downloading the executable it still complains about the same thing. So I am not sure what I am missing.
I watched the video from Innocent Irakoze, and Chris Clearman but have been unable to reach them. If anyone from TI could provide support in this regard that would be extremely helpful.
Thanks
Mohammad
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DRV8312: DRV8312 schematic and ADC pins
Part Number:DRV8312
Hello,
I am using DRV8312-C2-KIT and run the BLDC_Sensored program with F28069 .
In the schematic "SCH Rev C ,PCB Rev D" of the DRV8312 Evaluation Board . ADC-B1 and ADC-B4 are connected together and couple other paires as well to create the IA-FB,IB-FB,IC-FB . What is the porpuse of connecting two ADC together if it is not simutanoustly sampling and using as a differential mode ! ?
I know F28069 dont support defferential mode either!
Thanks
Ash
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CCS/DRV8703-Q1EVM: DRV8703-Q1EVM
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DRV8703-Q1: Independent Control
Part Number:DRV8703-Q1
Dear, Sir.
My customer's system has the multiple high-side & low-side driver circuit
and these are configred by discrete. So I am looking for the solution insead
of the discrete. I found the independent control function on DRV8703-Q1.
Please give your advice.
1. Is it possible to realize the indevidual resistive & inductive loads driving
by high-side & low-side using DRV8703-Q1?
2. Is it possible to use one current shunt amp for focused one load?
3. I wonder some protection would be activated under this kind of usage?
Best Regards,
H. Sakai
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DRV8711: footprint drawing
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DRV8837: Short-circuit protection
Part Number:DRV8837
Hi,Team
I need some help on the current limit for the DRV8837. Here is the problem description.
My application for DRV8837 is shown as below.R1 is not used. VCC=4V，IN1 and nSLEEP is pull high by VCC, A PWM signal (4V,50%Duty) is provided to IN2.
OUT1 is short to OUT2 .The captures are shown as below.
VM=2.5V,PWM 50KHz
VM=2.5V,PWM 10KHz
VM=1.5V,PWM 10KHz
There are my questions:
1. When OUT1 is short to OUT2,is the device protected by OCP?
2. If the OCP is occurred, why is OCP released so fast(PWM50KHz:6.3us; PWM10KHz:9.2us)?
3. Why is the time between pulse to pulse(IOUT) changed following PWM frequency?
Thanks!
Jason wei
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DRV8302: DRV8302 Three Phase Gate Driver With Dual Current Shunt Amplifiers and Buck Regulator – Hardware Controlled datasheet (Rev. C)
Part Number:DRV8302
hello Sir
in the typical application block diagram mentioned in page number 21 of the article mentioned above i want to know more about the MCU. is only ADC is used or other blocks are also used in the connection?
it would be helpfull if i get more information about it
thanking you,
Divya
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DRV8704: Reading the Status register
Part Number:DRV8704
Hey Im new to motor drive controllers. I have tried configuring the registers for DRV8704. code works fine.
I get a fault signal from the controller whenever i connect motor. But when there is no load connected i measure the correct voltage at the output pins, also i get no fault indication in my board.
I am stuck in reading the status register. I dont know why the fault occurs. If I could read the status register then i can proceed to finding the solution.
I am using Arduino IDE. The function i tried to read the status register is as follows,
uint16_t PMDC::STATUS()
{
uint16_t STATUS_reg = 0xF000;
PORTB |= (1 << SS_DRIVE);
PORTB &= ~(1 << SS);
SPDR = (STATUS_reg >> 8);
delay(1);
//while(!(SPDR&(1<<SPIF)));
Serial.println(SPDR,HEX);
SPDR = (STATUS_reg);
delay(1);
Serial.println(SPDR,HEX);
PORTB &= ~(1 << SS_DRIVE);
PORTB |= (1 << SS);
}
I tried to print the register value in serial moitor after writing the read bits. Am i wrong in doing that??
Sample code for reading the register may be very much useful.
Thanks you for the reply.
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DRV8838: Output protection
Part Number:DRV8838
I’m checking the DRV8838 datasheet as the d
Product design is in progress and I can’t find any note about ESD protection on the motor outputs. Our motor is going to work at 10V but I can’t find TVS that clamps at 10V but 12V, at the same time 12V is on the Maximum ratings of the DRV8838 and I don’t know if has already internally built in ESD protection because there is no information about that on the datasheet. Can you or anyone at your team help on that?
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DRV8704EVM: Does DRV8704EVM can work with 24V, 30A motor?
Part Number:DRV8704EVM
Hello,
I want to buy DRV8704EVM to control DC motor 24V, 30A with Peak Motor Current 80A.
Have you tested the board with the motor with working current like that?
I read spec of Mofet in the DRV8704EVM and it can work.
But the DRV8704EVM doesn't have heatsink or some thing like that, does it can work with 24V 80A without heatsink? If not which heatsink you recommend in this case?
Thanks
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Linux/DRV2624: waveform binary assembling/disassembling method
Part Number:DRV2624
Tool/software: Linux
Hi sirs,
I'm Chase from Google TW SEG and I focus on haptics SW part.
I'm Chase from Google TW SEG and I focus on haptics SW part.
In the DRV2624 spec(SLOS893B –SEPTEMBER 2014–REVISED SEPTEMBER 2016), I found that we could add some pre-defined waveforms to the haptics chip.
May I know is there any application manual/example to show the detail steps for how to assemble/disassemble waveform binary?
8.6.9 Waveform Setup and Playback
Playback of a haptic effect can occur in RTP mode or by using the waveform sequencer.
Playback of a haptic effect can occur in RTP mode or by using the waveform sequencer.
Many thanks,
Chase
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UCC27531: Just Blown up a UCC27531 driver and don't know why, or how to fix the design
Part Number:UCC27531
I've just blown up a UC27531 and I am at a loss as to the reason why. It's the first time I have used this driver so I have no experience with it at all.
The circuit :-
The "Pump" PWM signal is driven from an MSP430F2013 port, at 25 kHz with a duty cycle of 14 to 100 %
+Vbat is a 12V battery, and the pump draws 5A pk. The motor is brushless with an internal controller of unknown design. It has been tested successfully on a commercial PWM driver.
I have been testing the program/cicuit with a resistive load, but it failed withing seconds of turning it on. The MOSFET is fine, but the driver output is shorted to ground, I am at a loss as to the exact mechanism that killed the 2.5/5A device, but I assume it has something to do with the gate - drain Miller capacitance of Q2 and my lack of gate current limitation. I am surprised that the gate current could reach beyond 2.5A though, but admit that i did not do any calculations, in part because I don't know how.
I went to some trouble to follow the layout suggestions. In particular, the source and return traces (U3 - Q2) are parallel and their lengths are minimised. Similarly for the onboard traces to the pump.
Can someone explain the failure and suggest the design procedure that I should have used to prevent it?
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DRV8303: Mistakes in datasheet
Part Number:DRV8303
Hey Texas instruments, please check DRV8303 datasheet typical application schematic. There are few mistakes in schematic. Check SO2 and SO1 output RC filters. And C phase connection to DRV8303 is wrong. Here is link to datasheet : www.ti.com/.../drv8303.pdf
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DRV8320: DRV8320H Motor Hums but does not spin.
Part Number:DRV8320
Hi,
I'm having problems with DRV8320H. Motor hums but does not spin.
I am running with following settings..
* Supply Voltage 12.5V@24A.
* 1x PWM with MODE pin floating.
* PWM / I/O controlling from Arduino.
* IDRIVE and VDS are pulled up to DVDD with 18K resistor.
* Motor resistance between each phase is 0.3 Ohm.
* Motor configured as Delta Winding.
Thanks,
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I'm looking to drive a low voltage, low amperage motor, and I'm wondering if TI has any applicable nMOS transistors
Part Number:CSD88539ND
Chris Bull replied to my question, however, I realized:
I would be using the MC33033 to drive this as there are no 4 phase ready made CONTROLLER designs from TI hence can't use drv8303. (looks like mc33033 is the only 4 phase controller design as the DRV8303 recommended is 3-phase). So, I assume I can connect directly from MC33033 to 88539ND?
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CSD88539ND: 88539nd
Part Number:CSD88539ND
I have a 4 phase motor but not sure how to determine whether I need a half wave or full wave controller. There are 4 outputs going to the 4 coils in one config so 4 wires and in the other config, in addition there is another output going to the neutral i.e. where the 4 coils are joined together, so 5 wires in all.
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DRV8303: Inline current shunt
Part Number:DRV8303
In the datasheet in section 7.3.2, it says that "The DRV8303 includes two high performance current shunt amplifiers to accurate low-side, inline current measurement." However, in the functional block diagram in section 7.2 of the datasheet, the shunt resistors are implemented as a low-side current sense resistor only.
Inline current measurement is not mentioned anywhere else in the document, does that mean it is not currently supported or would the DRV8303 be able to support putting the shunt resistors inline with the motor phases?
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