DRV8821_10 Datasheet, PDF (2/16 Pages) Texas Instruments – DUAL STEPPER MOTOR CONTROLLER/DRIVER

DRV8821
SLVS912C – JANUARY 2009 – REVISED JANUARY 2010
FUNCTIONAL BLOCK DIAGRAM
0.47µF
6.3V
V3P3
Dig.
VCC
ABVREF
ABSTEP
ABDIR
ABENBLn
ABUSM0
ABUSM1
ABDECAY
ABRESETn
CDSTEP
CDDIR
CDENBLn
CDUSM0
CDUSM1
CDDECAY
CDRESETn
I ndexer
Logic
CDVREF
3.3V
Regulator
PWM H-bridge
driver A
PWM H-bridge
driver B
PWM H-bridge
driver C
PWM H-bridge
driver D
Charge
Pump and
Gate Drive
Regulator
VGD VCP
CP1
0.01µF
35V
CP2
+24
VCP
0. 1µF
16V
+24
VM
AOUT1
AOUT2
AISEN
+24
VM
BOUT1
BOUT2
BISEN
+24
VM
COUT1
COUT2
CI SEN
+24
VM
DOUT1
DOUT2
DISEN
OCP
Thermal
Shut down
Oscillator
UVLO
RESET
Step
Motor
Step
Motor
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GND
2
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