NJM3775 Datasheet, PDF (1/10 Pages) New Japan Radio – DUAL STEPPER MOTOR DRIVER

NJM3775
DUAL STEPPER MOTOR DRIVER
s GENERAL DESCRIPTION
The NJM3775 is a switch-mode (chopper), constant-
current driver with two channels: one for each winding
of a two-phase stepper motor. NJM3775 is equipped
with a Disable input to simplify half-stepping operation.
The NJM3775 contains 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, including recirculation diodes.
Voltage supply requirements are + 5 V for logic and +
10 to + 45 V for the motor. Maximum output current is
750mA per channel.
s PACKAGE OUTLINE
NJM3775D2 NJM3775E3
NJM3775FM2
s FEATURES
• Dual chopper driver
• 750 mA continuous output current per channel
• Digital filter on chip eliminates external filtering components
• Packages DIP22 / PLCC28 / EMP24(batwing)
s BLOCK DIAGRAM
Phase ₁
Dis₁ V_R1
C₁
NJM3775
V_CC
V_CC
—
+
E₁
RQ
S
Logic
+
—
RC
Logic
+
SQ
R
—
Phase ₂
Dis ₂ V_R2
C₂
GND
E₂
Figure 1. Block diagram
M _A1
M _B1
V_MM1
V_MM2
M _B2
M _A2