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參數(shù)資料
| 型號： | L497 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | HALL EFFECT PICKUP IGNITION CONTROLLER |
| 中文描述： | 霍爾效應(yīng)皮卡點火控制器 |
| 文件頁數(shù)： | 8/11頁 |
| 文件大?。?/td> | 106K |
| 代理商： | L497 |
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(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L-497 | 制造商:RHOMBUS-IND 制造商全稱:Rhombus Industries Inc. 功能描述:VERTICAL MOUNTED TOROID |
| L4970 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:10A SWITCHING REGULATOR |
| L4970A | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 5.1 to 40V Step-Down RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| L4970A | 制造商:STMicroelectronics 功能描述:IC SWITCHING REG 10A 4970 |
| L4970HT | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Voltage-Mode SMPS Controller |
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