L6470PD datasheet by STMicroelectronics

L6470PD Frequently Asked Questions (FAQs)

• What is the maximum voltage that can be applied to the VM pin?
  The maximum voltage that can be applied to the VM pin is 40V, but it's recommended to keep it below 35V for reliable operation.
• How do I properly set the current sense resistors (R Sense) for optimal performance?
  The value of R Sense should be chosen based on the maximum current rating of the motor and the desired current sense accuracy. A good starting point is to use a value between 0.1 ohm and 1 ohm, and then adjust based on the specific application requirements.
• What is the purpose of the ENN pin, and how do I use it?
  The ENN pin is an enable input that allows the L6470PD to be put into a low-power standby mode. To use it, simply tie ENN to VCC to enable the device, or tie it to GND to disable it.
• How do I configure the L6470PD for microstepping mode?
  To configure the L6470PD for microstepping mode, set the MRES pin to the desired microstepping resolution (e.g. 1/2, 1/4, 1/8, etc.) and ensure that the SYNC pin is tied to GND. Then, use the STEP and DIR pins to control the motor movement.
• What is the purpose of the THERMAL pin, and how do I use it?
  The THERMAL pin is an overtemperature warning output that goes high when the device exceeds a certain temperature threshold. To use it, connect the THERMAL pin to a microcontroller or other monitoring circuit to detect overheating conditions.