L6470H - STMicroelectronics

L6470H 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 50V, but it's recommended to keep it below 40V for reliable operation.
• How do I properly set the current sense resistors (R Sense) for the L6470H?
  The value of the current sense resistors (R Sense) depends on the maximum current 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 active-low enable input that allows the L6470H to be enabled or disabled. When ENN is low, the device is enabled, and when ENN is high, the device is disabled. This pin can be used to shut down the device when not in use to reduce power consumption.
• How do I configure the L6470H for microstepping mode?
  To configure the L6470H for microstepping mode, set the M0, M1, and M2 pins according to the desired microstepping resolution (e.g., full-step, half-step, quarter-step, etc.). The specific configuration depends on the desired microstepping mode and the application requirements.
• What is the maximum frequency of the clock input (CLK) pin?
  The maximum frequency of the clock input (CLK) pin is 500 kHz. However, the recommended frequency is typically lower, around 100 kHz to 200 kHz, to ensure reliable operation and minimize noise sensitivity.