NJM3717 Datasheet, PDF (1/10 Pages) New Japan Radio – STEPPER MOTOR DRIVER

NJM3717
STEPPER MOTOR DRIVER
s GENERAL DESCRIPTION
NJM3717 is a stepper motor diver, which consists of a LS-TTL
compatible logic input stage, a current sensor, a monostable
multivibrator and a high power H-bridge output stage with built-in
protection diodes.
The output current is up to 1200mA. Two NJM3717 and a small
number of external components form a complete control and drive
unit for stepper motor systems.
s PACKAGE OUTLINE
NJM3717D2
NJM3717E2
s FEATURES
• Half-step and full-step modes
• Switched mode bipolar constant current drive
• Wide range of current control 5 - 1200 mA
• Wide voltage range 10 - 50 V
• Thermal overload protection
• Packages DIP16 / PLCC28 / EMP20
s BLOCK DIAGRAM
NJM3717FM2
Phase
I1
I0
VR
GND
V_CC
V_MM
V_MM
Schmitt
Trigger
Time
Delay
1
1
1
MA
MB
&&&&
≥1
≥1
+
–
+
–
+
–
Current Sensor
Output Stage
Monostable
t _off
= 0.69 • R • C
TT
T
E
NJM3717
Figure 1. Block diagram