810-099175-012 LAM 电源接口板模块

810-099175-012一般来说，这类模块称为负载 (POL) 电源供应系统或使用点电源供应系统 (PUPS)。由于模块式结构的优点甚多，因此模块电源广泛用于交换设备、接入设备、移动通讯、微波通讯以及光传输、路由器等通信领域和汽车电子、航空航天等。

810-099175-012尤其近几年由于数据业务的飞速发展和分布式供电系统的不断推广,模块电源的增幅已经超出了一次电源。模块电源具有隔离作用，抗干扰能力强，自带保护功能，便于集成。随着半导体工艺、封装技术和高频软开关的大量使用,模块电源功率密度越来越大,转换效率越来越高,应用也越来越简单。

电源模块

810-099175-012人们在开关电源技术领域是边开发相关的电力电子器件，边开发开关变频技术，两者相互促进推动着开关电源每年以超过两位数字的增长率向着轻、小、薄、低噪声、高可靠、抗干扰的方向发展。开关电源可分为AC/DC和DC/DC两大类，DC/DC变换器现已实现模块化，且设计技术及生产工艺在国内外均已成熟和标准化，并已得到用户的认可，但AC/DC的模块化，因其自身的特性使得在模块化的进程中，遇到较为复杂的技术和工艺制造问题。以下分别对两类开关电源的结构和特性作以阐述

810-099175-012 DC/DC变换是将可变的直流电压变换成固定的直流电压，也称为直流斩波。斩波器的工作方式有两种，一是脉宽调制方式Ts不变，改变ton(通用)，二是频率调制（

（1）Buck电路——降压斩波器，其输出平均电压U0小于输入电压Ui，极性相同。

（2）Boost电路——升压斩波器，其输出平均电压U0大于输入电压Ui，极性相同。

（3）Buck－Boost电路——降压或升压斩波器，其输出平均电压U0大于或小于输入电压Ui，极性相反，电感传输。

（4）Cuk电路——降压或升压斩波器，其输出平均电压U0大于或小于输入电压Ui，极性相反，电容传输。还有Sepic、Zeta电路。

810-099175-012 上述为非隔离型DC-DC变换器电路，隔离型DC-DC变换器有正激电路、反激电路、半桥电路、全桥电路、推挽电路。

810-099175-012 当今软开关技术使得DC/DC发生了质的飞跃，美国VICOR公司设计制造的多种ECI软开关DC/DC变换器，其最大输出功率有300W、600W、800W等，相应的功率密度为(6.2、10、17)W/cm3，效率为（80～90）%。日本TDK-Lambda公司最新推出的一种采用软开关技术的高频开关电源模块RM系列，其开关频率为（200～300)kHz，功率密度已达到27W/cm3，采用同步整流器（MOSFET代替肖特基二极管），使整个电路效率提高到90%。

810-099175-012 LAM 电源接口板模块

810-099175-012 In general, such modules are called load (POL) power supply systems or point-of-use power supply systems (PUPS). Because of the advantages of the modular structure, the module power supply is widely used in switching equipment, access equipment, mobile communication, microwave communication, optical transmission, routers and other communication fields and automotive electronics, aerospace and so on.

810-099175-012 Especially in recent years due to the rapid development of data services and the continuous promotion of distributed power supply systems, the increase of module power supply has exceeded the primary power supply. The module power supply has the function of isolation, strong anti-interference ability, built-in protection function, easy to integrate. With the extensive use of semiconductor technology, packaging technology and high-frequency soft switches, the power density of module power supplies is increasing, the conversion efficiency is becoming higher and higher, and the application is becoming simpler and simpler.

Power module

810-099175-012 People in the field of switching power supply technology is the development of related power electronic devices, and the development of switching frequency conversion technology, the two promote each other to promote the switching power supply with a growth rate of more than two digits each year toward light, small, thin, low noise, high reliability, anti-interference direction. Switching power supply can be divided into AC/DC and DC/DC two categories, DC/DC converter has been modular, and the design technology and production process at home and abroad have been mature and standardized, and has been recognized by users, but the modularization of AC/DC, because of its own characteristics in the process of modularization, encounter more complex technology and process manufacturing problems. The structure and characteristics of the two types of switching power supplies are described below

810-099175-012 DC/DC conversion is to convert the variable DC voltage into a fixed DC voltage, also known as DC chopper. There are two ways of working the chopper, one is the pulse width modulation mode Ts unchanged, changing ton(universal), the other is frequency modulation (universal).

(1) Buck circuit - buck chopper, the output average voltage U0 is less than the input voltage Ui, the polarity is the same.

(2) Boost circuit - boost chopper, the output average voltage U0 is greater than the input voltage Ui, the polarity is the same.

(3) Buck-Boost circuit - Buck or Boost chopper, the output average voltage U0 is greater than or less than the input voltage Ui, the polarity is opposite, inductive transmission.

(4) Cuk circuit - buck or boost chopper, the output average voltage U0 is greater than or less than the input voltage Ui, the polarity is opposite, capacitive transmission. There are also Sepic and Zeta circuits.

810-099175-012 The above is a non-isolated DC-DC converter circuit, and the isolated DC-DC converter has forward circuit, flyback circuit, half-bridge circuit, full-bridge circuit and push-pull circuit.

810-099175-012 Today's soft switch technology makes DC/DC a qualitative leap, VICOR company design and manufacture of a variety of ECI soft switch DC/DC converter, its maximum output power is 300W, 600W, 800W, etc., the corresponding power density is (6.2, 10, 17)W/cm3, The efficiency is (80 ~ 90) %. Japan TDK-Lambda company recently launched a soft switching technology of high-frequency switching power module RM series, its switching frequency is (200 ~ 300)kHz, the power density has reached 27W/cm3, the use of synchronous rectifier (MOSFET instead of Schottky diode), so that the entire circuit efficiency increased to 90%.