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Part Number: L298

 

 

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Description: TheL298isanintegratedmonolithiccircuitina15- eadMultiwattandPowerSO20packages.Itisa ighvoltage,highcurren...


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L298 General Description


TheL298isanintegratedmonolithiccircuitina15- eadMultiwattandPowerSO20packages.Itisa ighvoltage,highcurrentdualfull-bridgedriverde- igne toacceptstandardTTLlogiclevelsanddrive nductiveloadssuchasrelays,solenoids,DCand teppingmotors.Twoenableinputsareprovidedto nableordisablethedeviceindependentlyofthein- utsignals.Theemittersofthelowertransistorsof achbridgeareconnectedtogetherandthecorre- pondingexternalterminalcanbeusedforthecon-nectionofanexternalsensingresistor.Anadditional upplyinputisprovidedsothatthelogicworksata owervoltage.

L298 Maximum Ratings

Symbol
Parameter
Value
Unit
VS
PowerSupply
50
V
VSS
LogicSupplyVoltage
7
V

VI,Ven
InputandEnableVoltage
-0.3to7
V
IO
PeakOutputCurrent(eachChannel)
CNonRepetitive(t=10s)
CRepetitive(80%on-C20%off=10ms)
CDCOperatioon
3
2.5
2
A
A
A
Vsens
SensingVoltage
-1to2.3
V
Ptot
TotalPowerDissipation(Tcase =75C)
25
W
Top
JunctionOperatingTemperature
-25to130

Tstg,Tj
StorageandJunctionTemperature
-40to150

L298 Features

.OPERATINGSUPPLYVOLTAGEUPTO46V
.TOTALDCCURRENTUPTO4A
.LOWSATURATIONVOLTAGE
.OVERTEMPERATUREPROTECTION
.LOGICAL!0!INPUTVOLTAGEUPTO1. HIGHNOISEIMMUNITY)

L298 Typical Application

Fig6showsabidirectionalDCmotorcontrolSche- aticDiagramforwhichonlyonebridgeisneeded. heexternalbridgeofdiodesD1toD4ismadeby ourfastrecoveryelements(trr  200nsec)that ustbechosenofaVFaslowaspossibleatthe orstcaseoftheloadcurrent.

Thesenseoutputvoltagecanbeusedtocontrolthe urrentamplitudebychoppingtheinputs,ortopro- ideovercurrentprotectionbyswitchinglowtheen- bleinput.

Thebrakefunction(Fastmotorstop)requiresthat heAbsoluteMaximumRatingof2Ampsmust everbeovercome.

Whentherepetitivepeakcurrentneededfromthe oadishigherthan2Amps,aparalleledconfigura- ioncanbechosen(SeeFig.7).

Anexternalbridgeofdiodesarerequiredwhenin- uctiveloadsaredrivenandwhentheinputsofthe Carechopped;Shottkydiodeswouldbepreferred.

L298 Connection Diagram

L298 Connection Diagram

L298 datasheet

L298
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  • Datasheet: L298
  • File Size: 189547 KB
  • Manufacturer: STMICROELECTRONICS [STMicroelectronics]
  • Click here to Download

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