A3906
Low Voltage Stepper and Single/Dual DC Motor Driver
Functional Block Diagram
0.1 μF
0.1 μF
0.1 μF
10 μF
10 V
+5 V +5 V
VBB
GND
SLEEP
Charge Pump
Regulator
Sense2
Sense1
VCP
VBB
FL1
FL2
PWM Latch and
Blanking
Comparator
Bridge 2
PWM Latch and
Blanking
Comparator
Bridge 1
Sense1
VCP
VBB
IN1
IN2
Control Logic
IN3
IN4
Sense2
OUT1A
OUT1B
SENSE1
RS1
OUT2A
OUT2B
SENSE2
RS2
Allegro MicroSystems, Inc.
3
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com