NJM3772
DUAL STEPPER MOTOR DRIVER
s
GENERAL DESCRIPTION
The NJM3772 is a stepper motor driver, which circuit is
especially developed for use in microstepping applications in
conjunction with the matching dual DAC (Digital-to-Analog
Converter) NJU39610.
The NJM3772 contains a clock oscillator, which is common
for both driver channels, a set of comparators and flip-flops
implementing the switching control, and two H-bridges with
internal recirculation diodes. Voltage supply requirements are
+5 V for logic and +10 to +45V for the motor. Maximum output
current is 1000mA per channel.
s
PACKAGE OUTLINE
NJM3772D2
NJM3772FM2
s
FEATURES
•
Dual chopper driver
• 1000mA continuous output current per channel
• Specially matched to the Dual DAC NJU39610
• Packages
DIP22 / PLCC28
s
BLOCK DIAGRAM
Phase
1
V
R1
C
1
V
MM1
E
1
NJM3772
V
CC
V
—
+
CC
R
S
Q
M
A1
Logic
M
B1
V
BB1
+
—
V
BB2
M
B2
Logic
M
A2
RC
+
—
S
R
Q
Phase
2
V
R2
C
2
GND
V
MM2
E
2
Figure 1. Block diagram
NJRC [ NEW JAPAN RADIO ]
