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PDF GS-D200 Data sheet ( Hoja de datos )
| Número de pieza | GS-D200 | |
| Descripción | 2/2.5A BIPOLAR STEPPER MOTOR DRIVE MODULES | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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GS-D200
GS-D200S
2/2.5A BIPOLAR STEPPER MOTOR DRIVE MODULES
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
GS-D200
GS-D200S
Phase
Current
(A)
1.0 nom.
(0.5 to 2.0)
2.0 nom.
(0.5 to 2.5)
Voltage
Drop
(V)
4.1 max.
2.5 max.
Supply
Voltage
(V)
10 to 46
5.0±5%
12 to 40
5.0±5%
June 1994
1/17
1 page  
GS-D200/GS-D200S
PIN DESCRIPTION
Pin Function
1 GND1
2 Sync
3 Reset
4 Half/Full
5 Home
6 Stepclk
7 CW/CCW
8 Oscillator
9 Ioset
10 Control
11 Enable
12 Vss
13 GND2
14 D
15 C
16 B
17 A
18 Vs
Description
Return path for the logic signals and 5V supply.
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.
Asynchronous reset input. An active low pulse on this input preset the internal logic to the
initial state (ABCD=0101).
Half/Full step selection input.
When high or unconnected the half step operation is selected.
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.
The motor is moved one step on the rising edge of this signal.
Direction control input. When high or unconnected clockwise rotation is selected. Physical
direction of motor rotation depends also on windings connection.
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.
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.
Logic input that allows the phase current decay mode selection. When high or
unconnected the slow decay is selected.
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.
5V supply input. Maximum voltage must not exceed 7V.
Return path for the power section.
D output.
C output.
B output.
A output.
Module and motor supply voltage.
Maximum voltage must not exceed the specified values.
5/17
5 Page 
GS-D200/GS-D200S
USER NOTES
Supply Voltage
The recommended operating maximum supply
voltage must include the ripple voltage for the Vs
rail, and a 5V±5% for the Vss line is required.
The two supply voltages must to be correctly se-
quenced to avoid any possible erroneous position-
ing of the power stages. The correct power-up and
power-down sequences are:
Power-up
1) Vss (5V) is applied with Enable = Low
2) Vs (the motor supply voltage)
is applied
3) Enable is brougth High
Power-down 1) Enable is brougth Low
2) Vs is switched off
3) Vss is switched off.
Case Grounding
The module case is internally connected to pin 1
and 13. To obtain additional effective EMI shield,
the PCB area below the module can be used as an
effective sixth side shield.
Thermal Characteristics
The case-to-ambient thermal resistance of the GS-
D modules is 5°C/W. This produces a 50°C tem-
perature increase of the module surface for 10W of
internal dissipation.
According to ambient temperature and/or to power
dissipation, an additional heatsink or forced venti-
lation may be required. (See derating curves).
Supply Line Impedance
The module has an internal capacitor connected
accross the supply pins (18 and 13) to assure the
circuit stability. This capacitor cannot handle high
values of current ripple, and would be permanently
damaged if the primary energy source impedance
is not adequate.
The use of a low ESR, high ripple current 470µF
capacitor located as close to the module as possi-
ble is recommended. Suitable units are the SPRA-
GUE type 672D, the SPRAGUE 678D, the RIFA
type PEG 126 or any equivalent unit. When space
is a limitation, a 22µF ceramic multilayer capacitor
connected across the module input pins must be
used.
Module Protections
The GS-D200 outputs are protected against occa-
sional and permanent short-circuits of the output
pin to the supply voltage. The GS-D200S outputs
are also protected against short circuits to ground
and to another output. When the current exceeds
the maximum value, the output is automatically
disabled.
The GS-D200S protection is of the latching type,
i.e. when an overload condition is detected the
unit outputs are disabled. To restart the opera-
tions it is necessary to disable the unit (pin
11=Low) or to switch off the supply voltage for at
least 100ms.
Motor Connection
The motor is normally quite far from the module and
long cables are needed for connection. The use of
a twisted pair cable with appropriate cross section
for each motor phase is recommended to minimize
DC losses and RFI problems.
Unused Inputs
All the GS-D200 and GS-D200S logic inputs have
an internal pull-up, and they are high when uncon-
nected.
Phase Current Programming
The output current of the GS-D200 is factory set to
1A while the GS-D200S has a standard 2A value.
The phase current value can be changed by con-
necting an appropriate resistor between pin 9 and
ground or Vss (see fig. 14). In the first case the
phase current will decrease, in the latter it will
increase.
The maximum phase current must be limited to 2A
for the GS-D200 and 2.5A for the GS-D200S to
avoid permanent damage to the module.
GS-D200 phase current programming:
I>1A
I<1A
Ri
=
10
0.993
−I
⋅ I−
1
=
kΩ
Ri ≥ 8.2 kΩ
Rd
=
1
−
I
0.993
⋅
I
=
kΩ
GS-D200S phase current programming:
I>2A
I<2A
Ri
=
10 − 0.33 ⋅ I
0.473 ⋅ I − 1
=
kΩ
Ri ≥ 50 kΩ
⋅Rd
=
3.03
−
I
1.43
= kΩ
I
11/17
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet GS-D200.PDF ] | |
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