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基于NCP1014的5W電源適配器設(shè)計(jì)研究與仿真

摘要：為使電源適配器在大電壓范圍內(nèi)仍能保持高效、穩(wěn)定運(yùn)行，采用臨界電流法設(shè)計(jì)了基于NCP1014的5W恒流恒壓（CCCV）電源適配器，實(shí)驗(yàn)和仿真測(cè)得，電源在兩種模式下效率達(dá)80%，負(fù)載電壓紋波小于0.1A，電流紋波小于0.05A，證明設(shè)計(jì)方法正確和OrCAD/PSpice仿真可以作為電源設(shè)計(jì)的輔助工具。 敘詞：恒流恒壓（CCCV） OrCAD/PSPICE 10.5 收斂 瞬態(tài)分析 Abstract：In order to make the adapter with effective and stable operation over a wide voltage range, 5W CCCV(constant current constant voltage) adapter based on NCP1014 was designed with the method of the threshold current condition. The efficiency of the power is up to 80% on both continuous and discontinuous conditions with less 0.1A of the voltage ripple and less 0.03A of current ripple given by experiment and simulation.So the method used is right and the result of the simulation of OrCAD/PSpice can be used as an auxiliary tool for power supply design. Keyword：Constant current constant voltage; OrCAD/PSPICE 10.5; convergence; transient analysis

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