AMIS-30511 Datasheet, PDF (17/28 Pages) ON Semiconductor – Micro-Stepping Motor Driver

V_COIL
div2
div4
Ssh
AMIS−30511
Sh
Csh
buf
Ch
SLA−pin
Icoil = 0
PWMsh
PWMsh
Icoil = 0
SLAT
V_COIL
SLAT
NOT (Icoil = 0)
SLA−pin
last sample
is retained
V_BEMF
t
retain last sample
previous output is kept at SLA pin
t
SLAT = 1 ≥ SLA−pin is “transparent” during
V_BEMF sampling @ Coil Current Zero
Crossing. SLA−pin is updated “real−time”.
SLAT = 0 ≥ SLA−pin is not “transparent” during V_BEMF
sampling @ Coil Current Zero Crossing. SLA−pin is
updated when leaving current−less state.
Figure 11. Timing Diagram of SLA−pin
http://onsemi.com
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