L293DDWP Half H-bridge Driver
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L293DDWP device package
L293DDWP schematic symbol
Motors are one of the most commonly used electrical devices in the world. They are commonly used in all types of industrial, commercial and consumer electronic applications. In fact, the second industrial revolution was kick started due to the invention of motors and electrical machines. There are many different types of motors such as induction motors, synchronous motors, BLDC motors, servo motors and stepper motors. The stepper motors are very widely used in robotics and automatic machinery. In a stepper motor based system, the control circuit of the motor is of great importance. Without efficient and accurate control, the motor cannot deliver the required performance. The motor driver ICs are commonly used to control the power circuit of the motors. The motor driver ICs simplify the control circuit and provide control signals for driving the motor.
What is L293DDWP？
The L293DDWP is a quadruple high-current half H-bridge driver from Texas Instruments. This driver is a general purpose IC which can be used to drive the inductive loads such as relays, solenoid valves and stepper motors. The input voltage range of this driver is 4.5V to 36V and it is capable of providing 1A bidirectional drive current. All the inputs of this IC are TTL compatible. Each output of the IC consists of a totem-pole drive circuit with a Darlington sink and a pseudo Darlington source. With proper control signals, each driver pair forms a full H-bridge which can be used for motor control applications.
Pin Configuration
The pin configuration of the L293DDWP driver IC is given in the table below:
| Pin name | Pin description |
| Vcc1, Vcc2 | Power supply pins |
| 1,2EN | Driver 1,2 enable |
| 3,4EN | Driver 3,4 enable |
| 1A, 2A, 3A, 4A | Driver outputs |
| 1Y, 2Y, 3Y, 4Y | Driver outputs |
Features
- Supply voltage range of 4.5V to 36V
- Separate input logic supply
- Internal ESD protection
- Thermal shutdown
- High noise immunity inputs
- Output current of 1A per channel
- Peak output current of 2A per channel
- Output clamp diodes for inductive transient suppression
Applications
The applications of L293DDWP driver IC are provided as following:
- Relay control
- Solenoid valve control
- Money handling machines
- Video security cameras
- Printers
- Scanners
- Office equipment
- Factory automation
- Gaming machines
- Robotic applications
Specifications
The major technical specifications of the L293DDWP driver IC are provided as following:
- Voltage supply range: 4.5V to 36V
- Max supply voltage: 36V
- Max drive current: 2A
- Continuous output current: 600mA
- Max junction temperature: 150 degrees
- Continuous power dissipation: 2075mW
How L293DDWP work?
The L293DDWP is a driver IC from Texas Instruments which is widely used for controlling of inductive devices such as stepper motors, DC motors, solenoid valves and relay coils. The IC has a simple control interface and is capable of providing 1A drive current per channel.
The typical application circuit of L293DDWP is shown in the following figure:
L293DDWP application circuit
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