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RE: DRV2625: Initialization time
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DRV2625: Initialization time
Part Number: DRV2625
Hi Team,
my customer is interested in using the DRV2625. After a meeting one question came up where we need clarification from the experts.
- How long does it take until the Initialization Procedure described at 9.3.1 in the datasheet is finished. Background is that the application is battery operated. In order to safe battery life it could be considered that the DRV2625 will be turned off completely. So how long would it take until the Initialization is finished and the actuator can be driven with a waveform the library.
- Do the DRV2625 and the DRV2605 differentiate in this department
Please let me know what your thoghts are on this. Looking forward for your answers.
Kind regards
Dierk Bronner
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RE: DRV120: Max current into STATUS pin
Hi EE User 52,
Given that the DRV120 STATUS pin is guaranteed to output below 0.3V at 2mA, I recommend using a max current of 2mA. I believe it can handle more current, perhaps 5mA, but the maximum output low voltage would scale up to 0.75V, which may not be acceptable for your application.
Please let me know if you have any further questions.
Best,
Grant
Given that the DRV120 STATUS pin is guaranteed to output below 0.3V at 2mA, I recommend using a max current of 2mA. I believe it can handle more current, perhaps 5mA, but the maximum output low voltage would scale up to 0.75V, which may not be acceptable for your application.
Please let me know if you have any further questions.
Best,
Grant
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RE: DRV8886AT: Cannot drive above 600mA
Hello Rick,
Thank you for your prompt response.
1. I am measuring current at the supply. Using a Fluke 115 handheld DMM.
2. 1 oz copper on top and bottom of PCB, 2 layer board. I have about 110 square mm of copper on the top layer (Red in picture). I have 6 vias underneath the chip and about 250 square mm on the bottom layer (Blue in picture).
3. nFAULT pin remains at 5V. I have a 10k pull-up resistor to DVDD. I monitored this pin with an oscilloscope to make sure it does not have any faults while running.
Some additional thoughts I have as I am looking into this.
1. I have ENABLE and nSLEEP tied together. I constantly have my clock signal running.
I see in the datasheet sections 7.4 "The tWAKE time must elapse before the outputs change state after wake-up."
Also "TI recommends to keep the STEP pin logic low when coming out of nSLEEP or when applying power."
Just wanted to point this out in case you think it plays a part in my issue.
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RE: DRV2510Q1EVM: Powering the board
That is my setup, the LEDs are as described, I am using the GUI.
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RE: DRV120: Max current into STATUS pin
Thanks for the reply Grant. My thought was to use the open-drain STATUS pin to drive an LED by sinking enough current. When the DRV120 is driving a solenoid, the LED would be lit. 5mA at 0.75V could work if I choose the right LED & bias to a high enough voltage. Thank again.
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RE: DRV120: Max current into STATUS pin
Hi EE User 52,
Yes, the STATUS pin should be able to drive an LED. I would not recommend going above 5mA. Please note that the absolute maximum voltage on the status pin is 7V, thus I recommend powering the LED from a 6V or less supply. Additionally, note that the STATUS pin pulls down during normal operation and is high-impedance during a fault condition or when EN is low.
Best,
Grant
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DRV120: Max current into STATUS pin
Part Number: DRV120
What is the max current into the STATUS pin when its pulldown FET is active? Datasheet only mentions 2mA as Test Condition in VOL spec.
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RE: DRV8886AT: Cannot drive above 600mA
Hi Nathan,
Measuring the current at the power supply does not indicate the current through the windings. If you are not seeing the nFAULT pin going low, the current should be 2A peak (1.4A RMS) through each winding.
If you need to confirm current is being regulated properly, a current probe (not a DMM) will provide this information. Another short term method is to add a .1Ohm resistor in series with your winding, and measure the voltage across the resistor.
Measuring the current at the power supply does not indicate the current through the windings. If you are not seeing the nFAULT pin going low, the current should be 2A peak (1.4A RMS) through each winding.
If you need to confirm current is being regulated properly, a current probe (not a DMM) will provide this information. Another short term method is to add a .1Ohm resistor in series with your winding, and measure the voltage across the resistor.
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DRV8886AT: Cannot drive above 600mA
Part Number: DRV8886AT
I am using the DRV8886AT to drive a Sure Step STP-MTR-23055D : 2.8A rated Bipolar Stepper.
With other Stepper Controllers I can run this motor at 2.8A with a 24V supply. With the DRV8886AT, I am only able to get 600mA maximum with a 24V supply.
I am using 15k for RREF, TRQ 100%, 1/8 step size, and DECAY is floating. I have tried various Decay modes and haven't noticed a significant difference.
My Circuit board has 1.25 mm wide 1 oz copper traces that are 35mm long.
Any thoughts on why I cannot get more current supplied to the motor with this driver?
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RE: DRV8802: DECAY pin
Hello Hamamoto-san,
Let me check with our designers.
Let me check with our designers.
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DRV8802: DECAY pin
Part Number: DRV8802
Hi
I have some question about DECAY pin.
- Is there Pull-up resister or Pull-down resister at this pin?
- If there is, how much is the resister?
Best Regards,
Koji Hamamoto
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RE: DRV8303: Minimum required time for EN_GATE activation when reseting faults
Hello Clément,
I'm following up our design team regarding your question.
I'm following up our design team regarding your question.
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DRV8303: Minimum required time for EN_GATE activation when reseting faults
Part Number: DRV8303
Hi,
When manipulating the EN_GATE signal, we did find in the datasheet the maximum time we should not exceed in order to avoid putting the device in sleep mode.
However, we didn't see any minimum time requirement for this signal to be taken into account when deactivating/activating it to reset internal faults.
Could you please tell us what is the minimum duration required from the pulse to reset internal faults ?
Best Regards,
Clément
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RE: DRV2510Q1EVM: Powering the board
Ken,
DRV2510-Q1 has Class-D output, if there is no signal present at the output (J7) it would mean that the device is not operating. You're not using OUTA and OUTB test-points, correct?
Although if J5 is properly powered and D4 and D5 LEDs are ON, it would mean that the device is operating.
Is there a chance that you could inspect the voltage on pin 2 (EN) of the DRV2510-Q1? It should be at 3V3 to enable the device.
Also pin 8 (STDBY) should be at 0V.
The GUI controls should be Enable = ON, HiZ = OFF.
Best regards,
-Ivan Salazar
Applications Engineer - Low Power Audio & Actuators
DRV2510-Q1 has Class-D output, if there is no signal present at the output (J7) it would mean that the device is not operating. You're not using OUTA and OUTB test-points, correct?
Although if J5 is properly powered and D4 and D5 LEDs are ON, it would mean that the device is operating.
Is there a chance that you could inspect the voltage on pin 2 (EN) of the DRV2510-Q1? It should be at 3V3 to enable the device.
Also pin 8 (STDBY) should be at 0V.
The GUI controls should be Enable = ON, HiZ = OFF.
Best regards,
-Ivan Salazar
Applications Engineer - Low Power Audio & Actuators
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RE: DRV8830: DRV8830 is unable to enter sleep mode
Hi xiaoming,
I haven’t heard back from you, I’m assuming you were able to resolve your issue. If not, just post a reply below (or create a new thread if the thread has locked due to time-out)
I haven’t heard back from you, I’m assuming you were able to resolve your issue. If not, just post a reply below (or create a new thread if the thread has locked due to time-out)
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DRV8830: DRV8830 is unable to enter sleep mode
Part Number: DRV8830
DRV8830 is unable to enter sleep mode when IN1 and IN2 are set to low, the DRV8830 power consumption is still more than 400 uA.
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RE: DRV8305-Q1: Output Short Circuit Reliability Testing
Hi Sakai-san,
Sorry for the delayed response.
We have not been able to determine why the test was not implemented. We are evaluating if this test applies to future devices.
Sorry for the delayed response.
We have not been able to determine why the test was not implemented. We are evaluating if this test applies to future devices.
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DRV8305-Q1: Output Short Circuit Reliability Testing
Part Number: DRV8305-Q1
Dear, Sir.
My customer is considering to apply DRV8305-Q1 for thier system.
Souns like, OEM is requiring AEC-Q100-012 short circuit reliabilty on IC's.
Sorry to ask this kind of matter, but I would like to answer making concensus with
you for them. Please give your advice.
1. I wonder AEC-Q100-012 testing is implemented for DRV8305-Q1?
2. If no, Could you please let me know the reason why no implementation.
For instance, the target device of AEC-Q100-012 is embbed FET & integrated
protection function as IPD(Intelligent Power Device).
DRV8305-Q1 is no embbed FET's.
Best Regards,
H. Sakai
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DRV10987: drv10987
Part Number: DRV10987
I had put in a question on motionfire which mentioned in the specs a 4-phase controller. Got 3 replies, first from Brian Schmidt that said basically he could not help, second from Kiran Kumar who said something like it would be addressed and finally one from A.Vaze that also did not add value only saying he transferred it to another forum. So after 2 weeks no one at TI could answer my basic question!
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