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L293D-Current Driver: Features

The L293D is a quadruple high-current half-H driver that operates within a supply voltage range of 4.5 V to 36 V, providing bidirectional drive currents of up to 600 mA per channel. It features internal ESD protection, thermal shutdown, and is designed for driving inductive loads like motors and relays. The device includes separate logic and power supply terminals to minimize power dissipation and is characterized for operation from 0 to 70 degrees Celsius.

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9 views3 pages

L293D-Current Driver: Features

The L293D is a quadruple high-current half-H driver that operates within a supply voltage range of 4.5 V to 36 V, providing bidirectional drive currents of up to 600 mA per channel. It features internal ESD protection, thermal shutdown, and is designed for driving inductive loads like motors and relays. The device includes separate logic and power supply terminals to minimize power dissipation and is characterized for operation from 0 to 70 degrees Celsius.

Uploaded by

manikantha.gopalasetty
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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L293D- Current Driver

Features
 Wide Supply-Voltage Range: 4.5 V to 36 V
 Separate Input-Logic Supply
 Internal ESD Protection
 Thermal Shutdown
 High-Noise-Immunity Inputs
 Functionally Similar to SGS L293 and SGS L293D
 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)

Description
The L293 and L293D 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.
All inputs are TTL compatible. 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. When an
enable input is high, the associated drivers are enabled and their outputs are active and in
phase with their inputs. When the enable input is low, those drivers are disabled and their
outputs are off and in the high-impedance state. With the proper data inputs, each pair of
drivers forms a full-H (or bridge) reversible drive suitable for solenoid or motor
applications. On the L293, external high-speed output clamp diodes should be used for
inductive transient suppression.

A VCC1 terminal, separate from VCC2, is provided for the logic inputs to minimize
device power dissipation. The L293 and L293D are characterized for operation from 0 to
70 degree Celsius.
This chip contains 4 enable pins. Each enable pin corresponds to 2 inputs. Based on the
input values given, the device connected to this IC works accordingly.

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