SLVSE65C July 2018 – December 2023 DRV8847
PRODUCTION DATA
Refer to the PDF data sheet for device specific package drawings
The torque scalar is used to dynamically adjust the output current through a digital input pin, TRQ. This torque scalar decreases the trip reference value of the output current to 50% (whenever the TRQ pin is pulled-high). A torque scalar can be used to scale the holding torque of the stepper motor. For the I2C device variant (DRV8847S), this feature is implemented through an I2C register.
When the TRQ pin is pulled-low (or the TRQ bit is reset in the DRV8847S device variant), the trip current is calculated using Equation 2.
When the TRQ pin is pulled-high (or the TRQ bit is set in the DRV8847S device variant), the trip current is calculated using Equation 3.