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        uc3843 pdf

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        上传日期: 2008-06-16

        上 传 者: 发烧友他上传的所有资料

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        标签:UC(31)
        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.

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