Overview
The L293D, also known as L293DN in some packaging variants, is a monolithic integrated high voltage, high current four-channel driver designed by Unitrode (now part of Texas Instruments). This device is capable of accepting standard DTL or TTL logic levels and driving inductive loads such as relays, solenoids, DC and stepping motors, and switching power transistors. It features a wide supply-voltage range from 4.5 V to 36 V and includes separate input-logic supply, enabling operation at a lower voltage if necessary. The L293D is suitable for use in switching applications at frequencies up to 5 kHz and is available in various packages, including PDIP 16 and SO-20 surface mount configurations.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Current Capability per Channel | 600 mA | A |
| Peak Output Current (non-repetitive) per Channel | 1.2 A | A |
| Supply Voltage Range | 4.5 V to 36 V | V |
| Logic Input Voltage | Up to 1.5 V (High Noise Immunity) | V |
| Enable Facility | Yes, drivers enabled in pairs | |
| Internal Clamp Diodes | Yes | |
| Operating Temperature Range | -40°C to 150°C | °C |
| Package Types | PDIP 16, SO-20 |
Key Features
- Internal clamp diodes for protection against back-EMF.
- 600 mA output current capability per channel.
- Enable facility with drivers enabled in pairs.
- 1.2 A peak output current (non-repetitive) per channel.
- Logical '0' input voltage up to 1.5 V for high noise immunity.
- Overtemperature protection.
- Wide supply-voltage range from 4.5 V to 36 V.
- Separate input-logic supply.
Applications
The L293D is versatile and can be used in a variety of applications, including:
- Driving relays and solenoids.
- Controlling DC and stepping motors.
- Switching power transistors.
- Automotive and industrial control systems.
- Robotics and automation projects.
- Arduino and other microcontroller projects for motor control.
Q & A
- What is the L293D used for?
The L293D is used to drive inductive loads such as relays, solenoids, DC and stepping motors, and switching power transistors. - What is the output current capability of the L293D?
The L293D has an output current capability of 600 mA per channel. - What is the peak output current of the L293D?
The peak output current (non-repetitive) of the L293D is 1.2 A per channel. - What is the supply voltage range of the L293D?
The supply voltage range of the L293D is from 4.5 V to 36 V. - Does the L293D have internal clamp diodes?
Yes, the L293D includes internal clamp diodes for protection against back-EMF. - How are the drivers enabled in the L293D?
The drivers in the L293D are enabled in pairs using enable inputs (1,2EN and 3,4EN). - What is the operating temperature range of the L293D?
The operating temperature range of the L293D is from -40°C to 150°C. - Can the L293D be used with Arduino?
Yes, the L293D can be used with Arduino for controlling DC motors and other inductive loads. - What are the package types available for the L293D?
The L293D is available in PDIP 16 and SO-20 surface mount packages. - Does the L293D have overtemperature protection?
Yes, the L293D includes overtemperature protection.
