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參數(shù)資料
| 型號(hào)： | UC3844 |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | Fixed Frequency Current-Mode PWM Controller.(固定頻率電流型PWM控制器(開(kāi)啟門(mén)限電壓：16V，關(guān)門(mén)限電壓：10V）) |
| 中文描述： | 固定頻率電流模式PWM控制器。（固定頻率電流型脈寬調(diào)制控制器（開(kāi)啟門(mén)限電壓：16V的關(guān)門(mén)限電壓：10V時(shí)）） |
| 文件頁(yè)數(shù)： | 1/12頁(yè) |
| 文件大小： | 91K |
| 代理商： | UC3844 |
2000 Fairchild Semiconductor International
www.fairchildsemi.com
Rev. 5.0
Features
Low Start Up Current
Maximum Duty Clamp
UVLO With Hysteresis
Operating Frequency Up To 500KHz
Description
The UC3842/UC3843/UC3844/UC3845 are fixed fre-
quency current-mode PWM controller. They are specially
designed for Off - Line and DC-to-DC converter applica-
tions with minimum external components. These inte-
grated 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 Ideally suited for driving a power
MOSFET. Protection circuity Includes built in under-volt-
age lockout and current limiting. TheUC3842 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 UC3844and UC3845 can operate with 50% duty cycle.
8-DIP
14-SOP
1
1
Internal Block Diagram
UC3842/UC3843/UC3844/UC3845
SMPS Controller
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| UC3846N | SMPS Controller |
| UC3846 | SMPS（Switch-Mode Power Suppy) Controller(開(kāi)關(guān)模式電源控制器) |
| UC3854AJ | Low voltage CMOS quad bus buffers (3-state) with 5 V tolerant inputs |
| UC3854AL | Analog IC |
| UC3854AQ | Low voltage CMOS dual 2 to 4 decoder/demultiplexer |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UC3844/D | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:High Performance Current Mode Controller |
| UC3844_06 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:High Performance Current Mode Controllers |
| UC3844_11 | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS |
| UC3844A | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Current Mode PWM Controller |
| UC3844A-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 |
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