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PBL3717-2N Datasheet

  • PBL3717-2N

  • IC-STEPPER MOTOR DRIVER

  • 8頁

  • ETC

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April 1997
PBL 3717/2
PBL 3717/2
Stepper Motor
Drive Circuit
Description
PBL 3717/2 is a bipolar monolithic circuit intended to control and drive the current in
one winding of a stepper motor.
The circuit 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.
Two PBL 3717/2 and a small number of external components form a complete
control and drive unit for LS-TTL or microprocessor-controlled stepper motor systems.
Key Features
鈥?Half-step and full-step modes.
鈥?Switched mode bipolar constant
current drive.
鈥?Wide range of current control
5 - 1200 mA.
鈥?Wide voltage range 10 - 50 V.
鈥?Designed for unstabilized motor supply
voltage.
鈥?Current levels can be selected in steps
or varied continuously.
鈥?Thermal overload protection.
VCC
Schmitt
Trigger
Phase
I1
I0
VR
&
&
&
&
鈮?
Time
Delay
VMM
VMM
PB
L3
16-pin plastic
batwing DIP
1
1
1
MA
MB
鈮?
28-pin plastic
PLCC package
+
鈥?/div>
+
鈥?/div>
+
鈥?/div>
Output Stage
Monostable
t = 0.69 鈥?R 鈥?C
off
T T
Current Sensor
P
PBL 3717/2
E
L3
B
GND
C
T
Figure 1. Block diagram.
1
71
L
B /2
P 17
37
7/
7/2
71
20-pin SO wide
batwing package
2

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