Overview
The E-TEA3718SFP is a bipolar monolithic integrated circuit designed by STMicroelectronics to control and drive the current in one winding of a bipolar stepper motor. This IC is part of a comprehensive solution that, when paired with another E-TEA3718SFP and a few external components, forms a complete control and drive unit for LS-TTL or microprocessor-controlled stepper motor systems.
It features a robust design with built-in protection diodes, thermal overload protection, and the ability to operate in both half-step and full-step modes. The E-TEA3718SFP is versatile, supporting a wide range of current control from 5 to 1500 mA and a wide voltage range from 10 to 50 V, making it suitable for various stepper motor applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (VSS, VS) | 4.75 - 50 | V |
| Output Current (Im) | 0.020 - 1.5 | A |
| Ambient Temperature (Tamb) | 0 - 70 | °C |
| Junction Temperature (TJ) | -55 to +150 | °C |
| Input Voltage (VI) | 0 to 15 | V |
| High Level Input Voltage (VIH) | 2 | V |
| Low Level Input Voltage (VIL) | 0.8 | V |
| Comparator Threshold Voltage (VCH, VCM, VCL) | 390 - 440 | mV |
| Alarm Output Saturation Voltage | 0.8 | V |
| Package Type | SO20 | - |
Key Features
- Half-step and Full-step Mode: Supports both half-step and full-step operation for flexible motor control.
- Bipolar Drive: Provides bipolar drive of the stepper motor for maximum motor performance.
- Built-in Protection Diodes: Includes built-in protection diodes for enhanced reliability.
- Wide Range of Current Control: Allows current control from 5 to 1500 mA.
- Wide Voltage Range: Operates over a wide voltage range from 10 to 50 V.
- Thermal Overload Protection: Features thermal overload protection to prevent overheating.
- Alarm and Pre-alarm Outputs: Includes alarm and pre-alarm outputs for monitoring temperature conditions.
- Current Reduction in Alarm Condition: Reduces current in the motor windings during alarm conditions.
Applications
The E-TEA3718SFP is designed for use in various applications involving bipolar stepper motors, including:
- Industrial Automation: Suitable for controlling stepper motors in industrial automation systems.
- Medical Devices: Can be used in medical devices that require precise motor control.
- Printers and Plotters: Ideal for driving stepper motors in printers, plotters, and other precision printing equipment.
- Robotics and CNC Machines: Used in robotics and CNC machines where accurate and reliable motor control is essential.
Q & A
- What is the E-TEA3718SFP used for?
The E-TEA3718SFP is a bipolar monolithic integrated circuit used to control and drive the current in one winding of a bipolar stepper motor.
- What are the key features of the E-TEA3718SFP?
Key features include half-step and full-step mode, bipolar drive, built-in protection diodes, wide range of current control, and thermal overload protection.
- What is the operating voltage range of the E-TEA3718SFP?
The operating voltage range is from 10 to 50 V.
- What is the maximum output current of the E-TEA3718SFP?
The maximum output current is 1.5 A.
- Does the E-TEA3718SFP have thermal protection?
Yes, it features thermal overload protection and alarm/pre-alarm outputs for monitoring temperature conditions.
- What package types are available for the E-TEA3718SFP?
The E-TEA3718SFP is available in the SO20 package type.
- How does the current reduction work in alarm conditions?
In alarm conditions, the current in the motor windings is reduced according to the RC value and the comparator threshold voltage.
- What are the typical applications of the E-TEA3718SFP?
Typical applications include industrial automation, medical devices, printers and plotters, and robotics and CNC machines.
- How do I configure the input logic for different current levels?
The input logic is configured using the IN0 and IN1 pins, which select the outputs of three comparators to set the current level.
- What is the purpose of the pulse generator in the E-TEA3718SFP?
The pulse generator is a monostable triggered by the comparator output, which helps in regulating the motor current by switching off the power feed to the motor winding during a fixed pulse time.
