NJM3771 데이터 시트보기 (PDF) - Japan Radio Corporation
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NJM3771 Datasheet PDF : 9 Pages
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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 VR1
C1
NJM 3771
VCC
V
CC
–
+
+
–
+
–
–
+
RC
+
–
E1
RQ
S
Logic
Logic
SQ
R
Phase 2
CD2 VR2
C2
GND
E2
M A1
M B1
VMM1
VMM2
M B2
M A2
Figure 1. Block diagram
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