LV8726TA Datasheet, PDF (26/40 Pages) ON Semiconductor – Stepper Motor Pre-Driver

Fast decay current control
STEP
Set current
LV8726TA
Set current
Coil current
Blanking Time
Fchop
PW M(Chopping) period
Current mode CHARGE
FAST
CHARGE
Figure 37. Fast Decay Rising Slope
FAST
STEP
Set current
C oil current
B lankin g Tim e
PW M (C hopping) period
Set current
Fchop
Current m ode CHARG E
FAST
B la nkin g Tim e
FA S T
Figure 38. Fast Decay Falling Slope
CHARGE
FA S T
When a coil current reached the set current, external
MOSFETs are repeated Charge mode-> Fast decay mode
according to PWM period. The coil current is controlled
constant-current by repeating two modes.
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