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PDF EDE12400 Data sheet ( Hoja de datos )
| Número de pieza | EDE12400 | |
| Descripción | BI-POLAR CHOPPER STEPPER MOTOR CONTROL MODULE | |
| Fabricantes | E-Lab | |
| Logotipo |  |
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E-Lab Digital
Engineering, Inc.
EDE12400
Features
BI-POLAR CHOPPER STEPPER MOTOR CONTROL MODULE
Test 1
• Develops maximum possible motor torque by using
dual coil-current sensing & control loop circuits
• Allows use of drive voltage beyond rated motor
specification for enhanced torque & speed
• Chopper drive circuitry is current adjustable up to
2 Amps/coil using dual internal 5W sense resistors
• Motor supply voltage 0V to 46V
• Integral heatsink system and thermal potting
compound eliminate need for an auxiliary heatsink
or fan
• Eight internal 3A Schottky clamp diodes and large
filter capacitors for enhanced noise suppression
• Two modes of current chopping provide efficient
operation of both large and small stepper motors
• Internally generated voltage source for easily
setting maximum coil current
• Primary drive circuit thermal overload protection
• Standard 24 pin DIP pin spacing for easy PCB
placement & prototyping
• Threaded mounting coupler allows secure mount
to PCB in rugged applications
• Chopping frequency generated internally;
externally generated frequency may also be used
Overview
The EDE12400 stepper motor control module offers
designers a compact, reliable stepper motor control
system. Engineered with internal and external
heatsinks and a highly thermally conductive potting
compound, the need for cooling fans (known for short
lifetimes) or a large heatsink plate is eliminated. An
integrated chopper drive circuit safely provides the
maximum motor torque for a given drive voltage,
even one many times over the manufacture-specified
voltage, offering tremendous torque and speed
improvements over traditional stepper motor control
circuits. Maximum coil current is easily set using a
potentiometer or voltage divider, and can be
dynamically adjusted. The highly efficient design of
the EDE12400 drive circuitry combined with its unique
PowerCube™ package makes it the ideal motor
control solution for nearly any application.
Specification Summary
Max. motor voltage 46V
Max. current 2 Amps per coil
Full/half stepping and direction control
Complete stepper motor control unit
Based on the proven L297/L298™ chipset
Typical Applications
CNC / Milling Machines
Robotics
Industrial Equipment
Remote-Positioning Equipment
Scientific Apparatus
Valve Controls
Module Pinout
1 page  
E-Lab Digital Engineering, Inc.
EDE12400
removed from the coil until the next chopper cycle (at 20KHz, the PWM period is 50us). Because the maximum
module current is 2 Amps per coil, care should be taken to ensure that the maximum voltage applied to the
Vref input is 1 Volt; otherwise current will exceed 2 Amps per coil and damage to the module may occur. To
aid in usage, a 1V output (pin 9) is available to drive a voltage divider or potentiometer. Using this 1V signal (as
opposed to +5V or more) ensures that the Vref current control input stays within the 0-1 Volt range. A simple
voltage divider arrangement uses two resistors in series with one end connected to the 1V output from the
module and the other end to ground. The connection point between the two resistors is then connected to the
Vref input as the input voltage for the current limit. As an example, to limit current flow to .5 Amps (500mA) per
coil one would need to place a voltage of 0.25V onto the Vref pin. This may be accomplished using a 5K and
a 20K resistor is series, with the 5K resistor connected to ground on one end. A potentiometer may also be used
as a voltage divider; one end connected to the 1V output of the module, the other to Ground, and the wiper
to the module’s Vref input. This arrangement is illustrated in Figure One.
Figure Two: Internal 297-298 Connection Block Diagram
As illustrated by Figure Two, connection to the internal current sense resistors is available externally to the
module at pin 18, the ‘0.5 Ohm GND’ pin. Ordinarily, when using the internal sense resistors, Sense Out A (pin
22) is connected to Sense In 1 (pin 21), Sense Out B (pin 20) is connected to Sense In 2 (pin 19), and 0.5 Ohm
GND (pin 18) is connected to GND. If the use of external sense resistors is desired instead (for instance, to
reduce power consumption), one leg of each of the two external sense resistors should be connected to Sense
Out A and Sense Out B with the other two legs grounded. The 0.5 Ohm GND (pin 18) should be left floating,
and Sense In 1 & Sense In 2 should be connected to sense Out A & Sense Out B, respectively. Care should be
taken to ensure that if external resistors are used they are capable of carrying the maximum coil current.
www.elabinc.com
5
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet EDE12400.PDF ] | |
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