參數(shù)資料
型號: UC3845
廠商: 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)
文件頁數(shù): 7/11頁
文件大小: 96K
代理商: UC3845
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
UC3845A 制造商:TI 制造商全稱:Texas Instruments 功能描述:Current Mode PWM Controller
UC3845A-BW 制造商:FCI 制造商全稱:First Components International 功能描述:Current Mode PWM Controller Low Start-Up and Operating Current
UC3845AD 功能描述:電流型 PWM 控制器 Current Mode RoHS:否 制造商:Texas Instruments 開關(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
UC3845AD1 功能描述:電流型 PWM 控制器 RO 511-UC3845BD 9/04 RoHS:否 制造商:Texas Instruments 開關(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
UC3845AD1013TR 制造商:STMicroelectronics 功能描述: