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參數(shù)資料
| 型號(hào)： | UC3844AD |
| 廠商： | MICROSEMI CORP-ANALOG MIXED SIGNAL GROUP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | CURRENT MODE PWM CONTROLLER |
| 中文描述： | 1 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO14 |
| 封裝： | ROHS COMPLIANT, PLASTIC, SOIC-14 |
| 文件頁(yè)數(shù)： | 6/8頁(yè) |
| 文件大?。?/td> | 463K |
| 代理商： | UC3844AD |
High peak currents associated with capacitive loads necessi-
tate careful grounding techniques. Timing and bypass capaci-
tors should be connected close to pin 5 in a single point
ground. The transistor and 5k potentiometer are used to sam-
ple the oscillator waveform and apply an adjustable ramp to
pin 3.
Shutdown of the UC1842 can be accomplished by two meth-
ods; either raise pin 3 above 1V or pull pin 1 below a voltage
two diode drops above ground. Either method causes the out-
put of the 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
pin 1 and/or 3 is removed. In one example, an externally
latched shutdown may be accomplished by adding an SCR
which will be reset by cycling V
CC
below the lower UVLO
threshold. At this point the reference turns off, allowing the
SCR to reset.
UC1842/3/4/5
UC2842/3/4/5
UC3842/3/4/5
OUTPUT SATURATION CHARACTERISTICS
ERROR AMPLIFIER OPEN-LOOP
FREQUENCY RESPONSE
OPEN-LOOP LABORATORY FIXTURE
SHUT DOWN TECHNIQUES
6
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相關(guān)PDF資料 |
PDF描述 |
|---|---|
| UC3844ADM | CURRENT MODE PWM CONTROLLER |
| UC3844AM | CURRENT MODE PWM CONTROLLER |
| UC3842AD | CURRENT MODE PWM CONTROLLER |
| UC3842ADM | CURRENT MODE PWM CONTROLLER |
| UC3842AM | CURRENT MODE PWM CONTROLLER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UC3844AD | 制造商:Texas Instruments 功能描述:Pulse Width Modulation (PWM) Controller 制造商:Texas Instruments 功能描述:IC, CURRENT MODE PWM CTRL, 25V, SOIC-14 |
| UC3844AD1 | 功能描述:開(kāi)關(guān)變換器、穩(wěn)壓器與控制器 RO 511-UC3844BD 9/04 RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開(kāi)關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| UC3844AD8 | 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 |
| UC3844AD8 | 制造商:Texas Instruments 功能描述:PWM CONTROLLER SMD 3844 SOIC8 |
| UC3844AD8 | 制造商:Texas Instruments 功能描述:IC CURRENT MODE PWM CTRL 25V 8-SOIC 制造商:Texas Instruments 功能描述:IC, CURRENT MODE PWM CTRL, 25V, 8-SOIC |
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