L293中文资料德州仪器数据手册PDF规格书

1 Features

1• Wide Supply-Voltage Range: 4.5 V to 36 V

• Separate Input-Logic Supply

• Internal ESD Protection

• High-Noise-Immunity Inputs

• Output Current 1 A Per Channel (600 mA for

L293D)

• Peak Output Current 2 A Per Channel (1.2 A for

L293D)

• Output Clamp Diodes for Inductive Transient

Suppression (L293D)

2 Applications

• Stepper Motor Drivers

• DC Motor Drivers

• Latching Relay Drivers

3 Description

The L293 and L293D devices are quadruple high-

current half-H drivers. The L293 is designed to provide bidirectional drive currents of up to 1 A at

voltages from 4.5 V to 36 V. The L293D is designed

to provide bidirectional drive currents of up to 600-mA

at voltages from 4.5 V to 36 V. Both devices are

designed to drive inductive loads such as relays, solenoids, DC and bipolar stepping motors, as well as

other high-current/high-voltage loads in positive-

supply applications.

Each output is a complete totem-pole drive circuit,

with a Darlington transistor sink and a pseudo-

Darlington source. Drivers are enabled in pairs, with

drivers 1 and 2 enabled by 1,2EN and drivers 3 and 4

enabled by 3,4EN.

The L293 and L293D are characterized for operation

from 0°C to 70°C.