交错并联式双管正激变换器外文资料翻译

交错并联式双管正激变换器外文资料翻译内容摘要：

stitute a significant advantage switching power supply, etc. American PI (with) pany in Power in the mid 1990s first launched the new high frequency switching Power supply chip, known as the top switch Power, with low cost, simple circuit, higher efficiency. The first generation of products launched in 1994 represented TOP100/200 series, the second generation product is the TOPSwitch debuted in 1997 Ⅱ . The above products once appeared showed strong vitality and he greatly simplifies the design of 150W following switching power supply and the development of new products for the new job, also, high efficiency and low cost switch power supply promotion and popularization created good condition, which can be widely used in instrumentation, notebook puters, mobile phones, TV, VCD and DVD, perturbation VCR, mobile phone battery chargers, power amplifier and other fields, and form various miniaturization, density, on price can pete with the linear manostat AC/DC power transformation module. Switching power supply to integrated direction of future development will be the main trend, power density will more and more big, to process requirements will increasingly high. In semiconductor devices and magic materials, no new breakthrough technology progress before major might find it hard to achieve, technology innovation will focus on how to improve the efficiency and focus on reducing weight. Therefore, craft level will be in the position of power supply manufacturing higher in. In addition, the application of digital control IC is the future direction of the development of a switch power. This trust in DSP for speed and antiinterference technology unceasing enhancement. As for advanced control method, now the individual feels haven39。 t seen practicability of the method appears particularly strong,perhaps with the popularity of digital control, and there are some new control theory into switching power supply. （ 1） The technology: with high frequency switching frequencies increase, switch converter volume also decrease, power density has also been boosted, dynamic response improved. Small power DC DC converter switch frequency will rise to MHz. But as the switch frequency unceasing enhancement, switch ponents and passive ponents loss increases, highfrequency parasitic parameters and highfrequency EMI and so on the new issues will also be caused. （ 2） Soft switching technologies: in order to improve the efficiency of nonlinearity of various soft switch, mutation technical application and hygiene, representative of soft switch technology is passive and active soft switch technology, mainly including zero voltage switch/zero current switch (ZVS/ZCS) resonance, quasi resonant, zero voltage/zero current pulse width modulation technology (ZVS/ZCS PWM) and zero voltage transition/zero current transition pulse width modulation (PWM) ZVT/ZCT technical, etc. By means of soft switch technology can effectively reduce switch loss and switch stress, help converter transformation efficiency （ 3） Power factor correction technology (IC simplifies PFC). At present mainly divided into IC simplifies PFC technology passive and active IC simplifies PFC technology using IC simplifies PFC technology two kinds big, IC simplifies PFC technology can improve AC DC change device input power factor, reduce the harmonic pollution of power grid. （ 4） Modular technology. Modular technology can meet the needs of the distributed power system, enhance the system reliability. （ 5） Low output voltage technology. With the continuous development of semiconductor manufacturing technology, microprocessor and portable electronic devices work more and more low, this requires future DC DC converter can provide low output voltage to adapt microprocessor and power supply requirement of portable electronic devices People in switching power supply technical fields are edge developing related power electronics device, the side of frequency conversion technology, development of switch between mutual promotion push switch power supply with more than two year growth toward light, digital small, thin, low noise and high reliability, antiinterference direction. Switching power supply can be di。