Overview
The TEA3718DP, produced 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 TEA3718DP specifically comes in a Power DIP 12+2+2 package. It features 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 |
| Logic Input Voltage (VIH, VIL) | 2, 0.8 | V |
| Current Control Range | 5 to 1500 | mA |
| Thermal Resistance (Rth(j-a)) | 45 | °C/W |
Key Features
- Half-step and full-step mode: Supports both half-step and full-step operation for flexible motor control.
- Bipolar drive of stepper motor: Ensures maximum motor performance by driving the motor in bipolar mode.
- Built-in protection diodes: Provides inherent protection against back-EMF and other transient conditions.
- Wide voltage range: Operates over a wide voltage range of 10 to 50 V, making it versatile for various applications.
- Thermal overload protection: Includes thermal protection mechanisms to prevent overheating and ensure reliable operation.
- Alarm output: Features an alarm output that becomes low when the junction temperature reaches a critical level.
- Current control: Allows current levels to be selected in steps or varied continuously.
Applications
The TEA3718DP is designed 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 precision machinery. The IC's ability to handle unstabilized motor supply voltages and its built-in protection features make it a robust choice for demanding environments.
Q & A
- What is the primary function of the TEA3718DP IC?
The primary function of the TEA3718DP 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 IC?
The TEA3718 IC is available in several package options, including Power DIP 12+2+2, SO20, and Multiwatt 15.
- What is the voltage range for the TEA3718DP?
The TEA3718DP operates over a voltage range of 10 to 50 V.
- Does the TEA3718DP support half-step and full-step modes?
Yes, the TEA3718DP supports both half-step and full-step modes for stepper motor control.
- What kind of protection does the TEA3718DP offer?
The TEA3718DP offers built-in protection diodes and thermal overload protection.
- How is the current control managed in the TEA3718DP?
The current levels in the TEA3718DP can be selected in steps or varied continuously.
- What is the purpose of the alarm output in the TEA3718DP?
The alarm output becomes low when the junction temperature reaches a critical level, indicating an alarm condition.
- What is the recommended operating temperature range for the TEA3718DP?
The recommended operating temperature range for the TEA3718DP is 0 to 70°C.
- Can the TEA3718DP handle unstabilized motor supply voltages?
Yes, the TEA3718DP is designed to handle unstabilized motor supply voltages.
- What are some typical applications for the TEA3718DP?
The TEA3718DP is typically used in industrial automation, medical devices, and precision machinery where precise and reliable motor control is required.
