GS-D200
GS-D200S
2/2.5A BIPOLAR STEPPER MOTOR DRIVE MODULES
June 1994
1/17
FEATURES
Wide supply voltage range
Full/Half step drive capability
Logic signals TTL/CMOS compatible
Programmable motor phase current and chopper
frequency
Selectable Slow/Fast current decay
Synchronization for multimotor applications
Remote shut-down
Home position indication
DESCRIPTION
The GS-D200 and the GS-D200S are drive mod-
ules that directly interface a microprocessor to a two
phase, bipolar, permanent magnet stepper motors.
The phase current is chopper controlled, and the
internal phase sequence generation reduces the
burden of the controller and it simplifies software
development.
The GS-D200 uses bipolar power outputs while the
GS-D200S has powermos outputs to significantly
reduce both commutation and conduction losses.
A further benefit offered by the GS-D200S is the
complete protection of the outputs against any type
of shorts.
SELECTION CHART
Type
Ordering
Number
Phase
Current
(A)
Voltage
Drop
(V)
Supply
Voltage
(V)
GS-D200
1.0 nom.
(0.5 to 2.0)
4.1 max.
10 to 46
5.0
5%
GS-D200S
2.0 nom.
(0.5 to 2.5)
2.5 max.
12 to 40
5.0
5%
2/17
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
Vs
DC Supply Voltage (pin 18)
GS-D200
GS-D200S
48
42
V
V
Vss
DC Logic Supply Voltage (pin 12)
7
V
Tstg
Storage Temperature Range
40 to +105
C
Tcop
Operating Case Temperature Range
20 to +85
C
ELECTRICAL CHARACTERISTICS (T
A
= 25
C and V
S
=24V unless otherwise specified)
Symbol
Parameter
Test Conditions
Value
Unit
Min
Typ
Max
Is
Quiescent Supply Current
Pin 18
20
mA
Iss
Quiescent Logic Supply Current
Pin 12 Vss=5V
60
mA
Vi
Input Voltage
Pin
3,4,6,7,10,11
Low
High
2
0.8
Vss
V
V
Ii
Input Current
Pin
3,4,6,7,10,11
Vi=Low
Vi=High
0.6
10
mA
A
Vsat
Source/Sink Saturation Voltage(GS-D200)
Pin
14,15,16,17
Io=1A
1.8
V
Vsat
Source/Sink Saturation Voltage(GS-D200S)
Pin
14,15,16,17
Io=2A
1.8
V
IoL
Current Limit Intervention
GS-D200S
5
A
fc
Chopper Frequency
17
kHz
tclk
Stepckl Width
Pin 6 (See fig. 1)
0.5
s
ts
Set Up Time
"
1
s
th
Hold Time
"
1
s
tr
Reset Width
"
1
s
trclk
Reset to Clock Set Up Time
"
1
s
Figure 1: Signals Timing
GS-D200/GS-D200S
5/17
PIN DESCRIPTION
Pin
Function
Description
1
GND1
Return path for the logic signals and 5V supply.
2
Sync
Chopper oscillator output.
Several modules can be synchronized by connecting together all Sync pins. This pin can
be used as the input for an external clock source.
3
Reset
Asynchronous reset input. An active low pulse on this input preset the internal logic to the
initial state (ABCD=0101).
4
Half/Full
Half/Full step selection input.
When high or unconnected the half step operation is selected.
5
Home
When high, this output indicates that the internal counter is in its initial state (ABCD=0101).
This signal may be used in conjunction with a mechanical switch to ground or with open
collector output of an optical detector to be used as a system home detector.
6
Stepclk
The motor is moved one step on the rising edge of this signal.
7
CW/CCW
Direction control input. When high or unconnected clockwise rotation is selected. Physical
direction of motor rotation depends also on windings connection.
8
Oscillator
The chopper oscillator timing, internally fixed at 17kHz, can be modified by connecting a
resistor between this pin and Vss or a capacitor between this pin and Gnd1.
The oscillator input must be grounded when the unit is externally synchronized.
9
Ioset
Phase current setting input. A resistor connected between this pin and Gnd1 or Vss,
allows the factory setted phase current value (1A for GS-D200 and 2A for GS-D200S) to
be changed.
10
Control
Logic input that allows the phase current decay mode selection. When high or
unconnected the slow decay is selected.
11
Enable
Module enable input. When low this input floats the outputs enabling the manual
positioning of the motor. Must be LOW during power-up and down sequence, HIGH during
normal operation.
12
Vss
5V supply input. Maximum voltage must not exceed 7V.
13
GND2
Return path for the power section.
14
D
D output.
15
C
C output.
16
B
B output.
17
A
A output.
18
Vs
Module and motor supply voltage.
Maximum voltage must not exceed the specified values.
GS-D200/GS-D200S
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