RE: DRV8303: DRV8303 Flow Through Drive of High and Low Side FETs
Hi Steve, We will investigate, but this may take a few days. What are the register settings used? What FETs are being used on your board?
View ArticleRE: DRV8711: Stepper Driver - Current Waveform Has Double Peaks
Hi Omacitin, Please examine the DIR pin and the nFAULT pin. The 1/2 step is strange because the current appears to be 0, 100% and 50%. The indexer is 0, 71% and 100%. What register settings are you...
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RE: DRV8711: Stepper Driver - Current Waveform Has Double Peaks
Hi Rick,Thanks for getting back to me so quickly.I checked the DIR pin on the scope, and saw no significant noise. It was switching only when the motor changed directions, as it should.The nFAULT pin...
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DRV8711: Stepper Driver - Current Waveform Has Double Peaks
Part Number: DRV8711Hey E2E,I recently got a DRV8711 stepper driver board up and running. Today I hooked the stepper motor up to a scope with a current probe, because I was noticing some bad vibration...
View ArticleRE: Stepper motor driver IC Select
Hi Rick, Thank you for your reply. I will ask the customer what you asked. Q1: But The max output current for DRV8711 is 400mA in the datasheet. It cannot achieve 2.5A or 3A. Does this have any...
View ArticleRE: Blown DRV 8801
Hi Igor, With V3P3OUT at 1.2V, the internal logic is not fully operational. Something is causing the problem with one device but not the second. V3P3OUT should be 3.3V as you observed on the working...
View ArticleRE: How can I set the register of DRV8711
Hi user4849193, What is the VM voltage? What is the sense resistor value? What register settings are you using? Is the nFAULT output set? Can you provide current waveforms?
View ArticleRE: BOOSTXL-DRV8301: DRV8301 simulation model
Hi Johari, This post may help: e2e.ti.com/.../1247395
View ArticleBOOSTXL-DRV8301: DRV8301 simulation model
Part Number: BOOSTXL-DRV8301I am working with DRV8301 IC, I would like to create the simulation model of DRV8301 IC such as in simulink or PSIM etc. Is there any available information about this. Thanks.
View ArticleRE: DRV8871: Current sense monitoring measurement from the DRV8871 using the...
Hi Michael, It is not possible. The DRV8870 and DRV8872 (both without internal current sensing) have the ability to monitor H bridge current using external sense resistors.
View ArticleDRV8871: Current sense monitoring measurement from the DRV8871 using the ILIM...
Part Number: DRV8871Hi ,I was wondering if it is possible to monitor the H bridge current if I also connect a high impedance OP AMP (in series with the limit resistor ILIM pin) ??RegardsMichael
View ArticleRE: DRV8711: Stepper Driver - Current Waveform Has Double Peaks
Hi Omacitin, I have not seen current being regulated like this before. What is the VM voltage and current limit of the power supply? Can you provide the full step current scope captures? Please report...
View ArticleRE: Blown DRV 8801
Hi Rick, I lifted the V3P3OUT pin from the board and I am still having ~1.2V on that pin, which is now in the air. The layout is the same as in the working chip and the used external components too....
View ArticleRE: DRV8303: DRV8303 Flow Through Drive of High and Low Side FETs
FETS: TI CSD18540Q5BSeries Gate Resistance: 10 ohmsPVDD: 48VControl 1: 0x0542Control 2: 0x0000Gate drive peak current: 0.25 APWM mode: 6 InputsOCP mode: current limitOC adjustment: Vds 0.730 VOC/TW...
View ArticleRE: Blown DRV 8801
Hi Igor, Do you have the 0.47uF capacitor connected to V3P3OUT when the pin is lifted? This capacitor is needed to maintain the voltage.
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Blown DRV 8801
Hello,I have a circuit using two DRV8841 and one DRV8801 fed by a 24V 10A chinese DC switching power supply. I have one 4A DC Motor connected to each DRV8841, 8801 is unused at the moment. The DRV8801...
View ArticleRE: DRV8881: DRV8881P Fault trigger
Hi Katy, The simplest method to create a fault is to lower VM to approximately 5.5V. This will trigger an undervoltage fault. If you are trying to create a specific fault, a different procedure may be...
View ArticleRE: DRV8881: DRV8881P Fault trigger
Thank you for your quick response, Rick. My problem is that I can't decrease the voltage to the driver without decreasing the voltage to the entire board. Any other ways to do this?
View ArticleRE: DRV11873: Problems of design by DRV11873
Hi Shaw,We need couple of more things from your side to analyze this problem : - Can you please share Phase current waveform during the instance this problem occurs ?- Do yo see any problem while...
View ArticleRE: DRV8881: DRV8881P Fault trigger
Hi Katy, I was afraid the easy way would not work. So the next methods can be found in Table 7. 1) Overcurrent -- either short the outputs or connect the output going high to gnd or the output going...
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