- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄361544 > UC3842 (NXP Semiconductors N.V.) Current-mode PWM controller PDF資料下載
參數(shù)資料
| 型號： | UC3842 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Current-mode PWM controller |
| 中文描述： | 電流模式PWM控制器 |
| 文件頁數(shù)： | 7/11頁 |
| 文件大?。?/td> | 96K |
| 代理商： | UC3842 |
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
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| UC3842D | Current-mode PWM controller |
| UC3842N | Current-mode PWM controller |
| UC3843D | CURRENTMODE PWM CONTROLLER |
| UC3843N | CURRENTMODE PWM CONTROLLER |
| UC3844D | CURRENTMODE PWM CONTROLLER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UC3842A | 制造商:FCI 制造商全稱:First Components International 功能描述:High Performance Current Mode Controller |
| UC3842A/D | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:High Performance Current Mode Controller |
| UC3842A_05 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:High Performance Current Mode Controllers |
| UC3842A_07 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:High Performance Current Mode Controllers |
| UC3842A_11 | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:CURRENT MODE PWM CONTROL CIRCUITS |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。