參數(shù)資料
型號(hào): UC3842D1
廠(chǎng)商: FAIRCHILD SEMICONDUCTOR CORP
元件分類(lèi): 穩(wěn)壓器
英文描述: SMPS Controller
中文描述: 1 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO8
封裝: SOP-8
文件頁(yè)數(shù): 7/11頁(yè)
文件大?。?/td> 96K
代理商: UC3842D1
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
UC3844-D08-T HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS
UC3844L-S08-T HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS
UC3844-S08-R HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS
UC3844-S08-T HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS
UC3845-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
UC3842D1X 功能描述:電流型 PWM 控制器 Current Mode PWM Control IC RoHS:否 制造商:Texas Instruments 開(kāi)關(guān)頻率:27 KHz 上升時(shí)間: 下降時(shí)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
UC3842D8 功能描述:電流型 PWM 控制器 Current Mode RoHS:否 制造商:Texas Instruments 開(kāi)關(guān)頻率:27 KHz 上升時(shí)間: 下降時(shí)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
UC3842D-8 制造商:Texas Instruments 功能描述:Current Mode PWM Controller 1A 8-Pin SOIC Tube
UC3842D8G4 功能描述:電流型 PWM 控制器 Current-Mode PWM Controller RoHS:否 制造商:Texas Instruments 開(kāi)關(guān)頻率:27 KHz 上升時(shí)間: 下降時(shí)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
UC3842D8TR 功能描述:電流型 PWM 控制器 Current-Mode PWM Controller RoHS:否 制造商:Texas Instruments 開(kāi)關(guān)頻率:27 KHz 上升時(shí)間: 下降時(shí)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