Mark Philip Felipe said: Switching at 20-40Khz and use an 8 bit value to determine the duty cycle. Since this is closed loop servo application, the output may theoretically change back and forth (CW or CCW) every 1 ms (or 1000 uS). In reality, the mechanical…
Part Number: DRV8871 Other Parts Discussed in Thread: DRV8870 , DRV8876
Hi,
We've selected the DRV8871 chip to drive the 12V 4W latching solenoid: DSML-0630-12C.
However, we noticed in this topic here on TI forum that the DRV8871 is listed as not supporting…
Part Number: DRV8871 hi all,
i use in my design DRV8871 and sample an overshoots on the IN1 and IN2 pins in the moment that i connect the supply (all other pins are unconnected).
how it is possible? some has an idea?
BR,
Itzi
Thank you very much Ryan. In my case, I am using Adafruit DRV8871 (which uses the TI driver DRV8871). I think that pin "PGND" and "GND" are already internally connected in the breakout board, as per this schematic (available here )…
Part Number: DRV8871 Hello,
We are using the DRV8871 to drive a brushed DC motor using motor with the following settings:
* Load = Brushed DC motor
* VM = 40V
* Frequency = 5kHz
* In1 duty = varies between 10% and 100%
* In2 duty = 0%
* Imot = Between…
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…
Part Number: DRV8871 Other Parts Discussed in Thread: DRV8876
The way to measure load current: we insert high precision 1 ohm resistor between PGND pin and PCB ground。Then we amplifier the voltage signal across 1 ohm res and measure it by ADC.
The issue…
Part Number: DRV8871 Other Parts Discussed in Thread: DRV8210EVM , DRV8251A
The way to measure load current: we insert high precision 1 ohm resistor between PGND pin and PCB ground。Then we amplifier the voltage signal across 1 ohm res and measure it…
Hello Sherry,
1. I think so, but the customer needs to try and confirm.
2. The 0.5 ohm shunt resistor should support up to 1.4 A output current. We want to keep the voltage across GND to PGND above -0.7 V to avoid current flowing back through the FET…
Part Number: DRV8871 Other Parts Discussed in Thread: DRV8870 , DRV8872 Hi,
Because of the supply problem, I consider replacing DRV8871 with DRV8870 in mass production. Discarding the IChip feature is acceptable. I wonder if it's theoretically feasible…