| 基于NCP1207与UC3844的双管反激变换器比较 |
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| 引用本文： | 丁泳鑫,丁秀华,龚春英.基于NCP1207与UC3844的双管反激变换器比较[J].电力电子技术,2009,43(7). |
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| 作者姓名： | 丁泳鑫 丁秀华 龚春英 |
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| 作者单位： | 南京航空航天大学,江苏,南京,210016 |
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| 摘 要： | 高频、高效、高密度是目前电源技术的发展趋势。对基于NCP1207和UC3844的双管反激变换器的电路结构,工作原理及性能作了详细的比较,并进行实验验证。结果表明,基于NCP1207准谐振芯片的准谐振反激变换器利用开关管两端的电容与变压器初级的漏感产生谐振,并通过适当的控制实现了开关管在电压谷底开通,减小了开关损耗,提高了变换器的效率,比基于UC3844的反激变换器的效率高出2%~3%。
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| 关 键 词： | 变换器/DC/DC变换器 双管反激 准谐振 控制芯片 |
Comparison of Dual Switch Flyback DC/DC Converters based on NCP1207 and UC3844 |
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| DING Yong-xin,DING Xiu-hua,GONG Chun-ying.Comparison of Dual Switch Flyback DC/DC Converters based on NCP1207 and UC3844[J].Power Electronics,2009,43(7). |
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| Authors: | DING Yong-xin DING Xiu-hua GONG Chun-ying |
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| Affiliation: | Nanjing University of Aeronautics & Astronautics;Nanjing 210016;China |
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| Abstract: | Now the development of the power supply trends to high frequency,high efficiency and high definition.The circuit structure,operation principle and performance of dual switch flyback DC/DC converters based on NCP1207 and UC3844 are compared and verified.The result proves that a novel flyback converter using quasi-resonant technology with NCP1207 is developed.When the converter operates in discontinuous conduction mode(DCM),the switch can turn on atquasi-resonant valley by using the resonant between capacitor... |
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| Keywords: | converter/DC/DC converter dual switch flyback quasi-resonance control chip |
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