Overview
The TEA3718SDP, manufactured by STMicroelectronics, is a bipolar monolithic integrated circuit designed to control and drive the current in one winding of a bipolar stepper motor. This IC is part of a family of stepper motor drivers that include various package options such as Power DIP, SO20, and Multiwatt 15. The circuit integrates an LS-TTL compatible logic input, a current sensor, a monostable, and an output stage with built-in protection diodes. Two TEA3718 ICs, along with a few external components, can form a complete control and drive unit for LS-TTL or microprocessor-controlled stepper motor systems.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (VSS, VS) | 10 - 50 | V |
| Output Current (Im) | 0.020 - 1.2 | A |
| Ambient Temperature (Tamb) | 0 - 70 | °C |
| Junction Temperature (Tj) | -55 to +150 | °C |
| Input Voltage (VI) | -0.5 to 15 | V |
| High Level Input Voltage (VIH) | 2 | V |
| Low Level Input Voltage (VIL) | 0.8 | V |
| Thermal Resistance (Rth(j-c)) | 11 (Power DIP), 3 (Multiwatt 15), 16 (SO20) | °C/W |
| Thermal Resistance (Rth(j-a)) | 45 (Power DIP), 40 (Multiwatt 15), 60 (SO20) | °C/W |
Key Features
- Bipolar Drive: Provides maximum motor performance by driving the stepper motor in bipolar mode.
- Half-step and Full-step Mode: Supports both half-step and full-step operation for versatile motor control.
- Built-in Protection Diodes: Includes protection diodes to safeguard the IC from potential damage.
- Wide Voltage Range: Operates over a wide voltage range of 10 to 50 V.
- Current Control: Allows current levels to be selected in steps or varied continuously from 5 to 1500 mA.
- Thermal Overload Protection: Features thermal overload protection to prevent overheating.
- Alarm and Pre-alarm Outputs: Provides alarm and pre-alarm outputs for monitoring and managing thermal conditions.
Applications
The TEA3718SDP is intended for use in various stepper motor control systems, including those controlled by LS-TTL logic or microprocessors. It is suitable for applications requiring precise and reliable motor control, such as in industrial automation, medical devices, and other precision motion control systems.
Q & A
- What is the primary function of the TEA3718SDP IC?
The primary function of the TEA3718SDP IC is to control and drive the current in one winding of a bipolar stepper motor. - What are the different package options available for the TEA3718?
The TEA3718 is available in Power DIP, SO20, and Multiwatt 15 packages. - What is the operating voltage range of the TEA3718SDP?
The operating voltage range is 10 to 50 V. - What is the maximum output current of the TEA3718SDP?
The maximum output current is 1.2 A. - Does the TEA3718SDP have built-in thermal protection?
Yes, it features thermal overload protection and alarm/pre-alarm outputs. - Can the TEA3718SDP operate in both half-step and full-step modes?
Yes, it supports both half-step and full-step operation. - What is the purpose of the alarm and pre-alarm outputs?
The alarm and pre-alarm outputs are used to monitor and manage thermal conditions, indicating when the junction temperature reaches critical levels. - How is the current level controlled in the TEA3718SDP?
The current level can be selected in steps or varied continuously from 5 to 1500 mA. - Is the TEA3718SDP RoHS compliant?
Yes, the TEA3718SDP is RoHS compliant. - What are some typical applications of the TEA3718SDP?
Typical applications include industrial automation, medical devices, and other precision motion control systems.
