Hi Matsumoto-san,
Correct. The DRV8870 is more expensive per channel. But only one channel is required to operate the motor.
The DRV8870 VREF can be adjusted to raise or lower the current limit of the DRV8870.
Also signals need to be controlled at the inputs of the device.
We will continue to check into the your question on configuring the DRV8843.
Correct. The DRV8870 is more expensive per channel. But only one channel is required to operate the motor.
The DRV8870 VREF can be adjusted to raise or lower the current limit of the DRV8870.
Also signals need to be controlled at the inputs of the device.
We will continue to check into the your question on configuring the DRV8843.