參數(shù)資料
型號: UC3844D1X
廠商: FAIRCHILD SEMICONDUCTOR CORP
元件分類: 穩(wěn)壓器
中文描述: 1 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO8
封裝: SOIC-8
文件頁數(shù): 9/20頁
文件大?。?/td> 248K
代理商: UC3844D1X
file:///D|/fair/pdf/UC3844D1.html
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Product Folders and
Datasheets
Application
notes
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UC3844D1
SMPS Controller
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Contents
General description
The UC3842/UC3843/UC3844/UC3845
are fixed frequency current-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
ideally suited for driving a power
MOSFET. Protection circuity Includes
built in under-voltage lockout and
current limiting. 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.
Features
q
Low Start Up Current
q
Maximum Duty Clamp
q
UVLO With Hysteresis
q
Operating Frequency Up To 500KHz
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Datasheet
file:///D|/fair/pdf/UC3844D1.html (1 of 2) [10/7/02 11:27:53 AM]
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相關PDF資料
PDF描述
UC3842D1X
UC3845D1X
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UC3844DX
UC3845DX
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