A3982
DMOS Stepper Motor Driver with Translator
Functional Block Diagram
0.1 μF
0.22 μF
CP1
CP2
VREG
ROSC
VDD
REF
Current
Regulator
Charge
Pump
OSC
VCP
0.1 μF
DMOS Full Bridge
VBB1
DAC
Translator
DAC
OUT1A
OUT1B
PWM Latch
Blanking
Mixed Decay
SENSE1
VBB2
STEP
DIR
Gate
Drive
RS1
DMOS Full Bridge
RESET
MS1
Control
Logic
OUT2A
OUT2B
PWM Latch
Blanking
Mixed Decay
ENABLE
SENSE2
RS2
VREF
Allegro MicroSystems, Inc.
2
115 Northeast Cutoff, Box 15036
26184.28B
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com