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參數(shù)資料
| 型號： | L497B |
| 廠商： | 意法半導體 |
| 英文描述： | HALL EFFECT PICKUP IGNITION CONTROLLER |
| 中文描述： | 霍爾效應皮卡點火控制器 |
| 文件頁數(shù)： | 8/11頁 |
| 文件大?。?/td> | 106K |
| 代理商： | L497B |
OTHER APPLICATION NOTES
DUMP PROTECTION
Loaddump protectionmust be implemented by an
externalzenerif this functionis necessary.In fig.4
DZ
2
protects the driver stage, the connection be-
tweenpin 6 and 7 protectsthe output transistor of
pin6.MoreoverDZ
1
protectsboththepowersupply
input(pin 3) and Hall-effectsensor.
Resistor R
4
isnecessaryto limitDZ
1
currentduring
loaddump.
OVERVOLTAGELIMITATION
The external darlingtoncollectorvoltage is sensed
bythe voltagedivider R
2
, R
3
. Thevoltagelimitation
increasesrisingR
2
or decreasingR
3
.
Due to the active circuit used, an R
o
C
o
seriesnet-
work is mandatory for stability during the high vol-
tagecondition.
R
o
C
o
values dependon the darlingtonused in the
application.
Moreover the resistor R
13
is suggested to limit the
overvoltage even when supply voltage is discon-
nectedduringthe highvoltagecondition.
REVERSEBATTERYPROTECTION
Dueto thepresenceof externalimpedanceat pin6,
3, 16, 15 L497 is protectedagainstreverse battery
voltage.
NEGATIVESPIKEPROTECTION
If correct operation is requested also during short
negativespikes,thediodeD
S
andcapacitorC
s
must
beused.
Figure4 :
ApplicationCircuit.
L497
8/11
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相關代理商/技術參數(shù) |
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|---|---|
| L497D1 | 功能描述:馬達/運動/點火控制器和驅動器 Hall Effect Control 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 |
| L4981 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:L4981 功率因數(shù)校正集成電路 |
| L4981A | 功能描述:功率因數(shù)校正 IC Very High Power RoHS:否 制造商:Fairchild Semiconductor 開關頻率:300 KHz 最大功率耗散: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Reel |
| L4981A | 制造商:STMicroelectronics 功能描述:POWER FACTOR CORRECTOR 4981 DIP20 |
| L4981A_01 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:POWER FACTOR CORRECTOR |
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