DRV8818_15 Datasheet, PDF (9/31 Pages) Texas Instruments – DRV8818 Stepper Motor Controller IC

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8.2 Functional Block Diagram
DRV8818
SLVSAX9D – SEPTEMBER 2011 – REVISED JANUARY 2015
VCC
VCC
VGD
LS Gate
Drive
Internal Logic
Regulator and
References
LS Gate
Drive
Low Side Gate
Drive
VCC
VREF
ENABLEn
Charge
Pump
CP1
HS Gate
Drive
VM
CP2
VCP
VM
+
VM
VM
VMA
RESETn
SLEEPn
STEP
Motor Driver
A
AOUT1
AOUT2
+
Stepper
Motor
-
+
-
DIR
USM0
USM1
RESETn
Control
Logic/
Indexer
ISENA
VM
VMB
SRn
VCC _HOMEn
DECAY
Motor Driver
B
BOUT1
BOUT2
RCA
RCB
Thermal
Shut
Down
ISENB
GND
PPAD
GND
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