Abnormal Kt detect with DRV10983
It can be found in the datasheet that "For any given motor, the integrated value of BEMF during half of an electrical cycle is constant. It is determined by motor velocity constant Kt"Is this the same...
View ArticleRE: Measure the LR time constant with DRV10983
Hi Howard, During Align state when motor is not spinning, essentially constant voltage (fixed duty cycle) is applied across LR of motor. So ripple current should give you good estimation of LR time...
View ArticleMeasure the LR time constant with DRV10983
The DRV10983 tuning guide says that the amplitude of the current ripple represents the LR time constant of the motor, but how can we know the exact time constant? For example, the current ripple in the...
View ArticleRE: DRV8801 VPROPI bandwidth
Hi Jonathan, We will check and get back to you. This may take a few days.
View ArticleDRV8801 VPROPI bandwidth
What is the Bandwidth of the VPROPI output signal?? I'm trying to understand how much it will rolloff my current sense signal. For reference, the external RC that you show in the datasheet has a...
View ArticleRE: DRV110 PWM Signal - FET not coming fully on every time
Hello Jordan,Could you try removing R8 and testing it again, and let us know what the output is.Regards,Ramon
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DRV110 PWM Signal - FET not coming fully on every time
A solenoid driver has been designed using the DRV110 APWR. It is designed to handle a pick current of 10A and a hold current of 0.6A. It is oscillating at 20 kHz and offers a 1s keep time for the pick...
View ArticleRE: high-side and low-side solenoid control
We have moved your post to the appropriate forum.
View ArticleRE: high-side and low-side solenoid control
Hi Jeff, What voltage are you using? The DRV8840 might be a good choice, as it can provide 5A maximum and has current control available through the use of a reference voltage and sense resistor. There...
View ArticleRE: high-side and low-side solenoid control
Supply is 13.8VDC. I will review the DRV8840.
View Articlehigh-side and low-side solenoid control
Is there an application circuit for a 5A capable high-side and low-side solenoid control with 0-3A current control using PWM signal?
View ArticleMotor driver for gas meter
Hi, I am looking for some motor driver part recommendations for a gas meter design. Brushed with FET integrated would be preferred. I would also appreciate any recommendations for a TI design.
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RE: Motor driver for gas meter
Hi Chinnu,Can you provide more information?What is the min and max voltage?What is the current?There are many drivers to choose from. Please see the link:
View ArticleRE: Motor driver for gas meter
Hi Rick, Thanks - Link is very helpful. I will look into DRV8832. Any reference design?
View ArticleRE: Motor driver for gas meter
Hi Chinnu, There is an evaluation module, the DRV8832EVM. The schematics and layout are available online. There is also a reference design based on the DRV8832EVM, www.ti.com/.../TIDA-00141
View ArticleRE: DRV8838 EN pin question
Hi Rich,If we would like to stop the motor by 2 limit switch, the concept design is the motor turns on forward direction(PH = 0), rotates the shaft until hits a limit switch then motor stop ( water...
View ArticleRE: DRV8838 EN pin question
correct the requirement==================================PH signal(PH = 1) to control reverse direction==================================
View ArticleRE: DRV8838 EN pin question
Hi NT,I am not sure the TPS3421 results in the desired operation. Reading the datasheet, it appears both pushbuttons must be pressed for many seconds before a reset pulse is issued.Is that what you...
View ArticleDRV8838 EN pin question
HelloI have question about EN pin of DRV8838, I break(stop) DC motor by using push bottom switch( see diagram as attached)and control direction (forward and reverse) by MCU. When EN pin low and PH...
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