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DRV8301: Safe Torque Off function (STO) by disabling PVDD1
Part Number: DRV8301I need to realize a safe torque off function (STO) with the DRV8301. Can I turn off the voltage on pin PVDD1 (29) while the three half bridges remain powered? The following image...
View ArticleRE: DRV8834: About actual waveform at over current protection(OCP)
Hi Luis-san,Thank you for your kind support.I’m looking forward to hearing from you.Regards,Kanemaru
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DRV8834: About actual waveform at over current protection(OCP)
Part Number: DRV8834Hi Team, We understand that the behavior of OCP and H bridges is the following chart.Is my understanding correct? And, our customer would like to know the actual waveform at over...
View ArticleRE: CCS/DRV8885EVM: DRV8885EVM Firmware Bug?
Hi Duncan,Thanks for your reply.I'm fairly sure the byte gets received properly and written to memory, I've modified the serial command handler to read back each read from memory once written and...
View ArticleRE: DRV8825: Oscillations on Motor driver IC output
Dear Rick,In first two waveforms with actual motor, hannel1 is current and channel2 is voltage across the load.In last two waveforms with simulated load, channel2 is voltage and channel3 is current...
View ArticleRE: DRV8301: Safe Torque Off function (STO) by disabling PVDD1
Hi RickOk. I see. Where are these parasitic diodes? Can you show me them in the block diagram?What about the maximum ratings of the pins GH_x, BST_x, SH_x and GL_x? Best regardsThomas
View ArticleRE: DRV8305-Q1: Dead time,ｔDRIVEP/N,Vgs monitor,internal OSC
Hellow Phil-san,I am looking forward to your reply.-Harukawa
View ArticleDRV8305-Q1: Dead time,ｔDRIVEP/N,Vgs monitor,internal OSC
Part Number: DRV8305-Q1[About Dead time]I want to confirm about the dead time of DRV8305-Q1.Q1-1.See attached file(Case 1.pdf).In the case where A(rising edge of INHx) is entered after B(dead time of...
View ArticleRE: DRV8811: Incorrect current regulation
Hi Shimizu-san, We will investigate and reply soon. Can you provide more information? What is the VM voltage? What is the VREF voltage? What is the sense resistor value?
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DRV8811: Incorrect current regulation
Part Number: DRV8811Hi,My customer has a problem.Some DRV8811s cannot regulate the motor current correctly at setting small chopping current.Please see the below waveform.Waveform1 is incorrect...
View ArticleRE: DRV8825: Oscillations on Motor driver IC output
Hi Raju,Sorry, I was not clear in my question. In the simulated load, why does channel 2 go negative?The simulated load appears to be different than the motor. What is the inductance and resistance of...
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DRV8825: Oscillations on Motor driver IC output
Part Number: DRV8825Hi,We are using DRV8825 IC for driving Peristaltic Pump which is having stepper motor. We designed one fixture to simulate the motor with equivalent inductor and resistance.When we...
View ArticleRE: DRV8870: Absolute maximum ratings of VM, OUT1 and OUT2 in case of transient
Hi Matsumoto-san,The absolute maximum and minimum values are listed in the datasheet. Please refer to footnote (1) which details the effect of exposure to absolute maximum conditions.What is the...
View ArticleDRV8870: Absolute maximum ratings of VM, OUT1 and OUT2 in case of transient
Part Number: DRV8870Hi allWould you mind if we ask DRV8870?The datasheet shows Absolute maximum ratings of VM, OUT1 and OUT2 in case of DC.How much is Absolute maximum ratings of VM, OUT1 and OUT2 in...
View ArticleRE: DRV8881EEVM: DRV8881
Tim, I apologize for the very slow reply here. This GUI Application would have been created with GUI Composer v1. I took a look at the manifest and it is dated 2015 which is before GUI Composer v2 came...
View ArticleRE: DRV8871: Using as a transformer driver
Hi Bryan, The DRV8871 may fit your application. There are some items to be aware of: There is no internal watchdog to turn off the outputs if the input clock stops. The dead time is controlled by the...
View ArticleDRV8871: Using as a transformer driver
Part Number: DRV8871I'm designing an H-Bridge circuit to drive a transformer for an unregulated isolated supply (similar to MAX13256). There needs to be dead-time control for the FETs, and overcurrent...
View ArticleRE: DRV8301: DRV8301 Lock-Up Issue
Phil,Thanks for your quick response!Richard Elmquist
View ArticleRE: DRV8881EEVM: DRV8881
Hi Tim, I apologize also for the delay. When you said 400PPS are you referring to 400 PPS at full step? If not what micro step mode is being used?
View ArticleDRV8881EEVM: DRV8881
Part Number: DRV8881EEVMHello-We are trying to adapt the PC code for the DRV8881EEVM so we can increase acceleration and deceleration rates for our motor. Could you please tell us which version of GUI...
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