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參數(shù)資料
| 型號： | UC3842N |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SMPS Controller |
| 中文描述： | 1 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDIP8 |
| 封裝： | DIP-8 |
| 文件頁數(shù)： | 7/11頁 |
| 文件大小： | 96K |
| 代理商： | UC3842N |
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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|---|---|
| UC3843 | SMPS Controller |
| UC3843AD | SMPS Controller |
| UC3843D | SMPS Controller |
| UC3842D1 | SMPS Controller |
| UC3844-D08-T | HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UC3842N | 制造商:Fairchild Semiconductor Corporation 功能描述:DC/DC Converter (DC-DC) / Switching Regu |
| UC3842NG4 | 功能描述:電流型 PWM 控制器 Current-Mode PWM Controller RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| UC3842P | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Current Mode PWM Controller |
| UC3842Q | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| UC3842QTR | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Current-Mode SMPS Controller |
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