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參數資料
| 型號： | L298HN |
| 廠商： | 意法半導體 |
| 英文描述： | DUAL FULL-BRIDGE DRIVER |
| 中文描述： | 雙全橋驅動器 |
| 文件頁數： | 7/13頁 |
| 文件大小： | 185K |
| 代理商： | L298HN |
Figure7 :
Forhighercurrents,outputscan be paralleled.Takecareto parallelchannel1 with channel4
andchannel2 withchannel3.
APPLICATION INFORMATION (Refer to the block diagram)
1.1.POWEROUTPUT STAGE
TheL298integratestwopoweroutputstages(A;B).
The power output stage is a bridge configuration
and its outputscan drive an inductiveload in com-
monor differenzialmode,dependingon thestateof
the inputs. The current that flows through the load
comes out from the bridge at the senseoutput: an
externalresistor(R
SA
;R
SB
.) allowstodetectthe in-
tensityof this current.
1.2.INPUT STAGE
Eachbridgeis drivenbymeansof fourgatesthein-
putof whichare In1; In2; EnAand In3; In4 ; EnB.
TheIninputssetthebridgestatewhenTheEninput
ishigh;a lowstateoftheEninputinhibitsthebridge.
All the inputsareTTL compatible.
2. SUGGESTIONS
A non inductivecapacitor,usually of 100 nF, must
be foreseenbetween both Vs and Vss, to ground,
asnearaspossibletoGNDpin.Whenthelargeca-
pacitorof the powersupplyis too farfromthe IC, a
second smaller one must be foreseen near the
L298.
The senseresistor,not of a wirewoundtype, must
begroundednearthenegativepoleof Vsthatmust
be nearthe GND pin of the I.C.
Eachinput must be connectedto the source of the
drivingsignalsby meansof a veryshortpath.
Turn-OnandTurn-Off: Beforeto Turn-ONtheSup-
plyVoltageandbeforeto TurnitOFF,theEnablein-
put mustbe driven to the Low state.
3. APPLICATIONS
Fig6 showsa bidirectionalDC motorcontrolSche-
maticDiagram forwhichonlyonebridgeisneeded.
The externalbridge of diodesD1 to D4is made by
four fast recovery elements (trr
≤
200 nsec) that
must be chosen of a VF as low as possible at the
worstcase of the load current.
Thesenseoutputvoltagecanbeusedtocontrolthe
currentamplitudebychoppingtheinputs,or to pro-
videovercurrentprotectionbyswitchinglowtheen-
ableinput.
The brake function (Fast motor stop) requires that
the Absolute Maximum Rating of 2 Amps must
neverbe overcome.
When the repetitivepeak current neededfrom the
loadis higherthan 2 Amps,a paralleledconfigura-
tioncan be chosen(See Fig.7).
An externalbridge of diodes are required when in-
ductiveloadsaredriven and whenthe inputsof the
ICarechopped; Shottkydiodeswouldbepreferred.
L298
7/13
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相關代理商/技術參數 |
參數描述 |
|---|---|
| L298HN | 制造商:STMicroelectronics 功能描述:IC - Full Bridge Driver |
| L298KV | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:DC Motor Controller/Driver |
| L298N | 功能描述:馬達/運動/點火控制器和驅動器 Dual Full Bridge RoHS:否 制造商:STMicroelectronics 產品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| L298N | 制造商:STMicroelectronics 功能描述:MOTOR DRIVER |
| L298P | 功能描述:馬達/運動/點火控制器和驅動器 Dual Full Bridge RoHS:否 制造商:STMicroelectronics 產品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
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