DRV8825 understanding and Thermal Issue
Hi I am using DRV8825 Driver IC , I have few questions listed below :1. I am working on various frequency but stepper motor supports only certain frequency at which the motor rotates. Can you please...
View ArticleRE: DRV8842 goes too fast in nFAULT conditions after start the Motors movements
Hi Michele, The best method to avoid the nFAULT is to understand the cause. From your description, it could be overtemperature conditions. How long does nFAULT assert? Do you have a good thermal...
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RE: DRV8880 GUI install issues
Hi Rick,I did experience problems during installation. I do see that message and the warning : " Error getting URL software-dl.ti.com/.../gcruntime.propertiesI saved the contents of this html file in a...
View ArticleDRV8880 GUI install issues
I'm working on installing the DRV8880 EVM GUI and am not getting very far.I've uninstalled and re-installed several times, and end up with the same "Cannot extract package" message in the JS GUI. I've...
View ArticleRE: DRV8842 goes too fast in nFAULT conditions after start the Motors movements
Hi, Ok. Yes i have a large and good Thermal pad on the PCB. The cycle is very quite (like time) and i continuos monitoring the temperature of the driver, it is very low < 50°C. The short nFAULT...
View ArticleRE: DRV8307: Issues driving a BLDC motor
By the way, the power MOSFETs are the CSD88537ND.
View ArticleRE: DRV8307: Issues driving a BLDC motor
Hello, Could you clarify a couple things for me quickly? 1.) What is the VM voltage you're operating at? 2.) What is time scale of the attached oscilloscope plot in your first post? 3.) Does the motor...
View ArticleRE: DRV8307: Issues driving a BLDC motor
Hi Phil, 1.) What is the VM voltage you're operating at?24V2.) What is time scale of the attached oscilloscope plot in your first post?2.5ms/div3.) Does the motor start spinning while the FAULT pin is...
View ArticleRE: DRV8307: Issues driving a BLDC motor
I just turned on the motor again and, i noticed that it actually makes a sound (very high frequency sound) then a click as if it wanted to turn on but then stop (it was hard to hear because the room...
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RE: DRV8307: Issues driving a BLDC motor
R3 on the schematic (high side fet gate output WHSG) is the only one that transitioning.
View ArticleRE: DRV8307: Issues driving a BLDC motor
Hi, Thanks for the information. The oscilloscope plot shows FAULT going low for 5 ms, which is the fixed delay for an OCP event. An OCP event can be triggered either by the voltage being above the...
View ArticleRE: Apply PWM input to DRV8844 enable and input pins simultaneously?
Hi Otto, There is nothing wrong tying the IN and EN together. The design team says this should work.
View ArticleApply PWM input to DRV8844 enable and input pins simultaneously?
I am using the DRV8844 to drive a high frequency (ultrasonic) shaker. I need fast decay because, driving a coil, this chip will be switched at close to it's data sheet limit. Section 7.3.3 Table 2...
View ArticleRE: DRV8307: Issues driving a BLDC motor
Can you measure the Drain to source voltage across each of the MOSFET's in your circuit during startup?The high side FETs are about 23.3VThe low sides (Q1: 2.8V, Q2: 0.1V, Q3: 1.4V)Can you measure the...
View ArticleRE: DRV8307: Issues driving a BLDC motor
Can you measure the gate voltage for V_LS? Also, are you measure 23.3V between the V_MOT net and each U / V / W net?
View ArticleRE: DRV8307: Issues driving a BLDC motor
Can you measure the gate voltage for V_LS?ULSG: 8.28VVLSG: 9.8VWLSG: 0VAlso, are you measure 23.3V between the V_MOT net and each U / V / W net?Yes they go from 23.3V to ~22, 8V
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RE: DRV8307: Issues driving a BLDC motor
These are the screen capture on WHSG WHSG WHSG
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DRV8307: Issues driving a BLDC motor
Hi there,I'm using the DRV8307 to drive a 24V rated BLDC motor. I was able to drive it using the DRV8307EVM but i'm having some issues when trying to drive the same motor on my board.Below is the...
View ArticleRE: Problem connection with DRV8848EVM and GUI software
Hi Ian, Is the status LED blinking? The blinking LED is an indication the device is receiving power through the USB. Please double check the assigned COM Port. If it is not COM 4, please use the...
View ArticleRE: Problem connection with DRV8848EVM and GUI software
Hi Ian, I also ran across this post in the code composer forum: e2e.ti.com/.../1763219 The DRV8846EVM GUI and DRV8848EVM GUI are very similar.
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