Part Number: DRV8871EVM Hello,
I am trying to get the DRV8871EVM to work in my application. I am pulsing IN1 200us followed by IN2 200us from a 3.3V MCU. VM is set to 15V. I am using a scope across a load connected to OUT1 and OUT2. I am having clean…
Part Number: DRV8871EVM Other Parts Discussed in Thread: DRV8871 Hi,
I have a DRV8871 Evaluation board and I am using external PWM and was wondering if the full 0% to 100% duty cycle range can be used if the PWM frequency is 100khz.
The reason I ask…
Hello Gowri,
Based on the data shared by you ITRIP = 1.5 A which is the output current limit setting. This will not be the current flowing through the RLIM resistor. The current through the resistor will be very small. You can measure the maximum voltage…
Hello Toubib,
Are you using the DRV8871evm or are you using a custom PCB for these tests. I recommend trying the same experiments on an evm to rule out any layout issues. How quickly does it heat up? What are your control signals during that time (waveforms…
Hi Adrian,
My suggestion is to have as much separation between the noisy high power traces and the sensitive low voltage signals to prevent noise coupling. The picture below shows a layout example.
If you have the time, I suggest replacing the 24V…
Part Number: DRV8871 Other Parts Discussed in Thread: DRV8870 , hi team:
my customer use DRV8871 and DRV8870 to evaluate the BDC ,but check with the DRV8871EVM board, we found this issue:
1.The normal starting current waveform is as shown in the figure…
Hi Rachel,
What do you consider extended periods of time?
Does the motor continue to operate at 9W during this time?
Extended operation of the device depends primarily on the ambient temperature and the PCB 's ability to act as a heatsink.
Please…
Hi David,
- Is soldering the thermal pad compulsory when connecting 35V to VM power supply?
Yes, it is. We recommend this pad is soldered to the board ground.
- Does TI also sell an adapter board for this IC?
We do not sell an adapter board…
Part Number: DRV8871 Hi,
We are designing a DC-Motor controller using DRV8871. Our DC Motor is rated 12V 150mA.
Our questions are, 1) Is it recommend to add external flyback diodes between the Motor Driving OUT1 & OUT2 pins of DRV8871? Or DRV8871…
