Datasheet

Phase current control L6474
30/52 Doc ID 022529 Rev 3
Figure 12. Fast decay tuning during the falling steps
7.4 Torque regulation (output current amplitude regulation)
The output current amplitude can be regulated in two ways: writing the TVAL register or
varying the ADCIN voltage value.
The EN_TQREG bit (CONFIG register) sets the torque regulation method. If this bit is high,
ADC_OUT prevalue is used to regulate output current amplitude (see Section 9.1.8).
Otherwise the internal analog to digital converter is at the user’s disposal and the output
current amplitude is managed by the TVAL register (see Section 9.1.4).
The voltage applied to the ADCIN pin is sampled at fS frequency and converted in an NADC
bit digital signal. The analog to digital conversion result is available in the ADC_OUT
register.
&ALLINGSTEP

ST
FASTDECAY
T
&!,,
&!,,?34%0
&ALLINGSTEP

ST
FASTDECAY
T
&!,,
&!,,?34%0

ND
FASTDECAY
T
&!,,
&!,,?34%0
4IME
REFERENCECURRENT