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參數(shù)資料
| 型號： | UC3844N |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SMPS Controller |
| 中文描述： | 1 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDIP8 |
| 封裝： | DIP-8 |
| 文件頁數(shù)： | 1/12頁 |
| 文件大?。?/td> | 127K |
| 代理商： | UC3844N |
2002 Fairchild Semiconductor Corporation
www.fairchildsemi.com
Rev. 1.0.1
Features
Low Start up Current
Maximum Duty Clamp
UVLO With Hysteresis
Operating Frequency up to 500KHz
Description
The UC3842/UC3843/UC3844/UC3845 are fixed
frequencycurrent-mode PWM controller. They are specially
designed for Off-Line and DC to DC converter applications
with minimum external components. These integrated
circuits feature a trimmed oscillator for precise duty cycle
control, a temperature compensated reference, high gain
error amplifier, current sensing comparator and a high
current totempole output for driving a Power MOSFET. The
UC3842 and UC3844 have UVLO thresholds of 16V (on)
and 10V (off). The UC3843 and UC3845 are 8.5V(on) and
7.9V (off). The UC3842 and UC3843 can operate within
100% duty cycle. The UC3844 and UC3845 can operate
with 50% duty cycle.
8-DIP
14-SOP
1
1
8-SOP
1
Internal Block Diagram
UC3842/UC3843/UC3844/UC3845
S MPS Controller
* NORMALLY 8DIP/8SOP PIN NO.
* ( ) IS 14SOP PINNO.
* TOGGLE FLIP FLOP USED ONLY IN UC3844, UC3845
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| UC3844D1 | SMPS Controller |
| UC3844 | High Performance Current Mode Controllers(高性能電流模式控制器) |
| UC3845 | Fixed Frequency Current-Mode PWM Controller.(固定頻率電流型PWM控制器(開啟門限電壓：8.5V，關(guān)門限電壓：7.9V）) |
| UC3844 | Fixed Frequency Current-Mode PWM Controller.(固定頻率電流型PWM控制器(開啟門限電壓：16V，關(guān)門限電壓：10V）) |
| UC3846N | SMPS Controller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UC3844NG | 功能描述:電流型 PWM 控制器 52kHz 1A Current PWM w/48% Duty Cycle Max RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 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 |
| UC3844NG4 | 功能描述:電流型 PWM 控制器 Current-Mode PWM Controller RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 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 |
| UC3844P | 制造商:Texas Instruments 功能描述: |
| UC3844Q | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Current-Mode SMPS Controller |
| UC3844QTR | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Current-Mode SMPS Controller |
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