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參數(shù)資料
| 型號(hào)： | UC3844 |
| 廠(chǎng)商： | 意法半導(dǎo)體 |
| 英文描述： | Current Mode PWM Controller(電流模式PWM控制器) |
| 中文描述： | 電流模式PWM控制器（電流模式的PWM控制器） |
| 文件頁(yè)數(shù)： | 7/11頁(yè) |
| 文件大?。?/td> | 96K |
| 代理商： | UC3844 |
Figure9 :
OpenLoop Test Circuit.
Highpeakcurrentsassociatedwithcapacitiveloads
necessitate careful grounding techniques. Timing
and bypasscapacitors should be connectedclose
to pin5 in a singlepointground.The transistorand
5K
potentiometerareusedtosampletheoscillator
waveformand applyan adjustableramp to pin 3.
Figure10 :
ShutdownTechniques.
Shutdownof the UC2842 can be accomplishedby
twomethods; eitherraisepin3 above1V orpull pin
1 below a voltage two diode drops above ground.
Either method cause the output of the PWM com-
parator to be high (refer to block diagram). The
PWMlatch is reset dominant so that the outputwill
remain low until the next clock cycle after theshut-
downconditionatpins1and/or3isremoved.Inone
example, an externally latched shutdown may be
accomplishedby addingan SCRwhichwillbereset
bycyclingV
i
belowthelowerUVLOthreshold.Atthis
pointthereferenceturnsoff,allowingtheSCRtore-
set.
UC2842/3/4/5-UC3842/3/4/5
7/11
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UC3844/D | 制造商:未知廠(chǎng)家 制造商全稱(chēng):未知廠(chǎng)家 功能描述:High Performance Current Mode Controller |
| UC3844_06 | 制造商:ONSEMI 制造商全稱(chēng):ON Semiconductor 功能描述:High Performance Current Mode Controllers |
| UC3844_11 | 制造商:UTC-IC 制造商全稱(chēng):UTC-IC 功能描述:HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS |
| UC3844A | 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:Current Mode PWM Controller |
| UC3844A-BW | 制造商:FCI 制造商全稱(chēng):First Components International 功能描述:Current Mode PWM Controller Low Start-Up and Operating Current |
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