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參數(shù)資料
| 型號(hào)： | UC3843A-S08-R |
| 廠商： | UNISONIC TECHNOLOGIES CO LTD |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | CURRENT MODE PWM CONTROL CIRCUITS |
| 中文描述： | 1 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | SOP-8 |
| 文件頁數(shù)： | 7/9頁 |
| 文件大?。?/td> | 106K |
| 代理商： | UC3843A-S08-R |
UC3842A/3843A
LINEAR INTEGRATED CIRCUIT
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
7 of 9
QW-R103-002,D
S HUT DOWN T ECHNIQUES
8
3
3
5
1k
1
Shutdown
To current
Sense resistor
Shutdown
Shutdown UTC
UC3842A
can be accomplished by two methods; either raise pin 3 above 1V or pull Pin 1 below a
voltage two diode drops above ground. Either method caused the output of PWM comparator to be high(refer to
block diagram).The PWM latch is reset dominant so that the output will remain low until the next clock cycle after the
shutdown condition at pins 1 and/or 3 is removed . In one example, an externally latched shut –down may be
accomplished by adding an SCR which be reset by cycling V
CC
below the lower UVLO threshold. At this point the
reference turns off allowing the SCR to reset
.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| UC3843A-S08-T | CURRENT MODE PWM CONTROL CIRCUITS |
| UC3842A-D08-T | CURRENT MODE PWM CONTROL CIRCUITS |
| UC3842G | HIGH PERFORMANCE CURRENT MODE CONTROLLER |
| UC3842G-D08-R | HIGH PERFORMANCE CURRENT MODE CONTROLLER |
| UC3842G-D08-T | HIGH PERFORMANCE CURRENT MODE CONTROLLER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UC3843A-S08-T | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:CURRENT MODE PWM CONTROL CIRCUITS |
| UC3843AY | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
| UC3843B | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:HIGH PERFORMANCE CURRENT MODE CONTROLLERS |
| UC3843BCD1G | 制造商:ON Semiconductor 功能描述: |
| UC3843BD | 功能描述:電流型 PWM 控制器 52kHz 1A Current PWM 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 |
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