DRV8880_15 Datasheet, PDF (13/48 Pages) Texas Instruments – DRV8880 2-A Stepper Motor Driver With AutoTune™

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7.2 Functional Block Diagram
VM
0.1 µF
VM
0.47 µF
VCP
VM VM
Power
0.1 µF
CPH
CPL
Charge
Pump
10 mA
0.47 µF
V3P3
3.3-V LDO
+
0.1 µF bulk
AutoTune
STEP
DIR
ENABLE
nSLEEP
ATE
TRQ[1:0]
M[1:0]
DECAY[1:0]
TOFF
Control
Inputs
V3P3
V3P3
V3P3
Core Logic
Indexer
VREF
nFAULT
Analog
Input
Output
Protection
Overcurrent
Undervoltage
Thermal
GND GND PPAD
DRV8880
SLVSD18A – JUNE 2015 – REVISED JULY 2015
VM
Off-
time
PWM
Gate
Drive
VM
+
VREF
TRQ[1:0]
-
4
SINE DAC
1/Av
AOUT1
+
AOUT2 _-
Step
Motor
+-
AISEN
RSENSE
VM
Off-
time
PWM
Gate
Drive
VM
BOUT1
BOUT2
+
VREF
TRQ[1:0]
-
4
SINE DAC
1/Av
BISEN
RSENSE
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