NJM3771 Datasheet, PDF (1/9 Pages) New Japan Radio – DUAL STEPPER MOTOR DRIVER

NJM3771
DUAL STEPPER MOTOR DRIVER
s GENERAL DESCRIPTION
The NJM3771 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 NJM3771 contains a clock oscillator, which is common
for both driver channels; a set of comparators and flip-flops
imple menting the switching control; and two H-bridges with
internal recirculation diodes. Voltage supply requirements are
+5 V for logic and +10 to +45 V for the motor. Maximum
output current is 650 mA per channel.
s PACKAGE OUTLINE
NJM3771D2 NJM3771E3
s FEATURES
• Dual chopper driver
• 650 mA output current per channel
• Selectable slow/fast current decay for improved high-
speed microstepping
• Specially matched to Dual DAC NJU39610
• Packages DIP22 / EMP24(Batwing) / PLCC28
NJM3771FM2
s BLOCK DIAGRAM
Phase ₁
CD₁ V_R1
C₁
NJM 3771
V_CC
V
CC
–
+
+
–
+
–
–
+
RC
+
–
E₁
RQ
S
Logic
Logic
SQ
R
Phase ₂
CD₂ V_R2
C₂
GND
E₂
M _A1
M _B1
V_MM1
V_MM2
M _B2
M _A2
Figure 1. Block diagram