Four Channel Push-Pull Driver

 

 

General Description

The LM18293 is designed to drive DC loads up to one amp.

Typical applications include driving such inductive loads as

solenoids, relays and stepper motors along with driving

switching power transistors and use as a buffer for low level

logic signals. The four inputs accept standard TTL and DTL

levels for ease of interfacing. Two enable pins are provided

that also accept the standard TTL and DTL levels. Each

enable controls 2 channels and when an enable pin is dis-

abled (tied low), the corresponding outputs are forced to the

TRI-STATEÉ condition. If the enable pins are not connected

(i.e., floating), the circuit will function as if it has been en-abled. Separate pins are provided for the main power supply

(pin 8), and the logic supply (pin 16). This allows a lower

voltage to be used to bias up the logic resulting in reduced

power dissipation. The chip is packaged in a specially de-signed 16 pin power DIP. The 4 center pins of this package

are tied together and form the die paddle inside the pack-

age. This provides much better heat sinking capability than

most other DIP packages available. The device is capable

of operating at voltages up to 36 volts.

 

 

 

Features

1A output current capability per channel

Pin for pin replacement for L293B

Special 16 pin power DIP package

36 volt operation

Internal thermal overload protection

Logical ``0'' input voltage up to 1.5 volts results in high

noise immunity

 

 

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