NJM3774D2 View Datasheet(PDF) - Japan Radio Corporation
Part Name
Description
Manufacturer
NJM3774D2 Datasheet PDF : 9 Pages
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NJM3774
DUAL STEPPER MOTOR DRIVER
s GENERAL DESCRIPTION
The NJM3774 is a switch-mode (chopper), constant-
current driver with two channels: one for each winding of a
two-phase stepper motor. The NJM3774 is equipped with a
TTL level compatible Disable input to simplify half-stepping
operation. The circuit is well suited for microstepping
applications together with the matching dual DAC
NJU39610. In full/half stepping applications, the NJM3517
can be used as a phase generator (translator) to derive the
necessary signals for the NJM3774. The NJM3774 con-
tains a clock oscillator, which is common for both driver
channels, a set of comparators and flip-flops implementing
the switching control, and two output H-bridges. Voltage
supply requirements are +5 V for logic and +10 to +45 V for
the motor. Maximum output current is 1000mA per channel.
s PACKAGE OUTLINE
NJM3774D2 NJM3774FM2
s FEATURES
• Dual chopper driver
• 1000 mA continuous output current per channel
• Specially matched to the Dual DAC NJU39610
• Packages DIP22 / PLCC28
s BLOCK DIAGRAM
Phase 1
Dis1 VR1
C1
NJM3774
VCC
V
CC
–
+
E1
RQ
S
Logic
+
–
RC
Logic
+
SQ
R
–
Figure 1. Block diagram
Phase 2
Dis 2 VR2
C2
GND
E2
M A1
M B1
VMM1
VMM2
M B2
M A2
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