Description
The L293D is a monolithic, high-voltage, high-current, four-channel motor driver designed to accept standard DTL or TTL logic levels and drive inductive loads such as relays, solenoids, DC motors, and bipolar stepper motors. It acts as a current amplifier, taking low-current control signals from a microcontroller and providing the higher current necessary to operate motors.
The IC contains two integrated H-bridge circuits. Each pair of channels is equipped with an enable input, allowing for independent control of two motors. The design includes internal clamp diodes to protect against voltage spikes from inductive loads and features separate supply inputs for the logic and the motors, facilitating operation at different voltage levels.
Note: Product images are for illustrative purposes only. Please refer to the official datasheet for detailed pinouts, timing requirements, and application circuits.
Features
- Dual H-Bridge: Capable of driving two DC motors simultaneously in forward and reverse directions.
- Output Capability: 600mA output current per channel (1.2A peak, non-repetitive).
- Logic Compatibility: High-noise-immunity inputs compatible with DTL/TTL levels; logical “0” input up to 1.5V.
- Protection: Includes internal clamp diodes, thermal shutdown, and ESD protection.
- Independent Control: Enable pins allow for easy PWM speed control and output disabling (high-impedance state).
- Voltage Range: Wide operating supply voltage range (4.5V to 36V).
Benefits
- Simplifies motor control hardware by integrating two H-bridges into a single package.
- Internal flyback diodes protect the circuit from inductive kickback, reducing the need for external components.
- Flexible power management through separate logic and motor supply pins.
- Robust performance in high-noise environments typical of industrial and robotics applications.
Applications
- DC Motor Direction and Speed Control
- Bipolar Stepper Motor Drivers
- Relay and Solenoid Actuation
- Robotics and Small Automation Projects
- Switching Power Transistors
Package Includes
- 1 x L293D Motor Controller/Driver (PowerDIP-16)
Specifications
| Parameter | Specification |
|---|---|
| Product Name | L293D |
| Device Type | Dual H-Bridge Driver |
| Package / Case | PowerDIP-16 |
| Operating Voltage | 4.5V to 36V |
| Max Output Current | 600mA per channel |
| Operating Temperature | -40°C to 130°C |
| Dimensions (L × W × H) | 19.20 × 7.97 × 3.26 mm |
