24 V

5 V

10 k

Ω

VCC1

VCC2

Control A

Control B

4, 5, 12, 13

GND

Thermal

Shutdown

Motor

16

8

3

6

11

14

4Y

3Y

2Y

1Y

1,2EN

1A

2A

3,4EN

3A

4A

15

10

9

7

2

1

L293, L293D

www.ti.com

SLRS008D – SEPTEMBER 1986 – REVISED JANUARY 2016

9 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component

specification, and TI does not warrant its accuracy or completeness. TI’s customers are

responsible for determining suitability of components for their purposes. Customers should

validate and test their design implementation to confirm system functionality.

9.1 Application Information

A typical application for the L293 device is driving a two-phase motor. Below is an example schematic displaying

how to properly connect a two-phase motor to the L293 device.

Provide a 5-V supply to VCC1 and valid logic input levels to data and enable inputs. VCC2 must be connected to a

power supply capable of supplying the needed current and voltage demand for the loads connected to the

outputs.

9.2 Typical Application

Figure 6. Two-Phase Motor Driver (L293)

9.2.1 Design Requirements

The design techniques in the application above as well as the applications below should fall within the following

design requirements.

1. VCC1 should fall within the limits described in the Recommended Operating Conditions.

2. VCC2 should fall within the limits described in the Recommended Operating Conditions.

3. The current per channel should not exceed 1 A for the L293 (600mA for the L293D).

9.2.2 Detailed Design Procedure

When designing with the L293 or L293D, careful consideration should be made to ensure the device does not

exceed the operating temperature of the device. Proper heatsinking will allow for operation over a larger range of

current per channel. Refer to the Power Supply Recommendations as well as the Layout Example.

Copyright © 1986–2016, Texas Instruments Incorporated

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