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參數(shù)資料
| 型號(hào)： | L497B |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 模擬信號(hào)調(diào)理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDIP16 |
| 封裝： | DIP-16 |
| 文件頁(yè)數(shù)： | 9/11頁(yè) |
| 文件大?。?/td> | 474K |
| 代理商： | L497B |
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Figure 2 : SRC : Icoil Failure and Time Dependence of Active Region.
Figure 3 : Permanent Conduction Protection.
HJ : Input signal
IC : Coil current
VCM : Voltage on capacitor CSRC.
DST : Percentage of imposed desaturation time.
PERMANENT CONDUCTION PROTECTION
(fig. 3)
The permanent conduction protection circuit moni-
tors the input period, charging CP with a costant cur-
rent when the sensor signal is high and discharging
it when the sensor signal is low. If the input remains
high for a time longer than TP the voltage across CP
reaches an internally fixed value forcing the slow de-
crease of coil current to zero. A slow decrease is
necessary to avoid undesired sparks. When the in-
put signal goes low again CP is swiftly discharged
and the current control loop operates normally.
The delay time TP is given by :
TP (sec) = 18 CP R7
Where R7 is the biasing resistor on pin 12 (in K) and
Cp the delay capacitor at pin 9 (in
F).
L497
7/11
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L497D1 | 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 Hall Effect Control RoHS:否 制造商:STMicroelectronics 產(chǎn)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(fēng)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(guān)頻率:300 KHz 最大功率耗散: 最大工作溫度:+ 125 C 安裝風(fēng)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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