Datasheet

Phase current control L6480
40/75 DocID023278 Rev 4
bit is low, the compensation is disabled and the internal analog to digital converter is at the
user’s disposal; the sampling rate is always equal to PWM frequency.
7.6 Winding resistance thermal drift compensation
The higher the winding resistance the greater the voltage to be applied in order to obtain the
same phase current.
The L6480 integrates a register (K_THERM) which can be used to compensate phase
resistance increment due to temperature rising.
The value in the K_THERM register (Section 9.1.15 on page 49) multiplies duty cycle value
allowing the higher phase resistance value to be faced.
The compensation algorithm and the eventual motor temperature measurement should be
implemented by microcontroller firmware.