DRV8842_15 Datasheet, PDF (8/27 Pages) Texas Instruments – DC Motor Driver IC

DRV8842
SLVSAB8F – MAY 2010 – REVISED DECEMBER 2015
7.2 Functional Block Diagram
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3.3V
V3P3OUT
VM
LS Gate
Drive
3.3V
VREF
VREF
V3P3OUT
Internal
VCC
Low Side
Gate
Drive
PHASE
ENBL
I0
I1
I2
I3
I4
DECAY
nRESET
nSLEEP
Control
Logic/
Indexer
nFAULT
Thermal
Shut
Down
Charge
Pump
CP1
HS Gate
Drive
VM
CP2
VM
VCP
VM
VM
VM
+ _Additional
Bulk Cap
OUT1
OUT1
Motor Driver
BDC
+
Stepper
Motor
-
OUT2
OUT2
ISEN
ISEN
GND
PPAD
GND
7.3 Feature Description
7.3.1 PWM Motor Driver
The DRV8842 contains one H-bridge motor driver with current-control PWM circuitry. A block diagram of the
motor control circuitry is shown in Figure 5.
8
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