APM-420A  电源模块  可以实现宽频调制隔离及多种保护等功能

APM-420A 电源模块是一种可以直接贴装在印刷电路板上的电源供应器，其特点是为专用集成电路（ASIC）、数字信号处理器 (DSP)、微处理器、存储器、现场可编程门阵列 (FPGA) 及其他数字或模拟负载提供供电。

APM-420A 电源模块按变换方式一般分为AC转DC或DC转DC。随着科技的发展，电源体积趋向模块化和小型化，于是出现了电源模块。其集成度最高，将开关电源的主要电路集成在芯片中，可以实现宽频调制隔离及多种保护等功能。

APM-420A 电源模块具有小体积、高集成度、高性价比和最佳性能指标，只需要最简的外围电路，配上少量分立式元件即可使用。当产品设计需更改时，只需并联或替换电源模块即可。

由于模块式结构的优点甚多，APM-420A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、航空航天等领域。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。

选择合适的电源模块需要考虑以下因素：

额定功率：一般建议使用功率是模块电源额定功率的30~80%。

工作频率：一般工作频率越高，输出纹波噪声就更小，但对元器件材料的要求也就越高，所以效率越高价格也就越贵。

功率损耗和效率：一般输出功率一定条件下，模块损耗越小，则效率越高，温升就低，寿命更长。

封装形式：在一定功率条件下体积要尽量小，保证系统安全可靠，具有可扩展性。

温度范围：一般有商品级、工业级、军用级选用，考虑实际需要的工作温度范围，从中选择，不同温度等级所用到的材料和工艺不同，不同等级价格相差较大。

隔离电压：高的隔离电压可以保证电源模块更小的漏电流，更高的安全性、可靠性、EMC特性。

APM-420A  电源模块  可以实现宽频调制隔离及多种保护等功能

The APM-420A power module is a power supply that can be mounted directly on a printed circuit board and is characterized by providing power for application-specific integrated circuits (ASics), digital signal processors (DSPS), microprocessors, memory, field programmable gate arrays (FPgas), and other digital or analog loads.

The APM-420A power module is divided into AC to DC or DC to DC according to the conversion mode. With the development of science and technology, the volume of power supplies tends to be modular and miniaturized, so there is a power module. The main circuit of the switching power supply is integrated in the chip, which can realize the functions of broadband modulation isolation and a variety of protection.

APM-420A power module has small size, high integration, high cost performance and the best performance indicators, only the simplest peripheral circuit, with a small number of discrete components can be used. When the product design needs to be changed, just parallel or replace the power module.

Because of the advantages of modular structure, APM-420A module power supply is widely used in switching equipment, access equipment, mobile communication, microwave communication, optical transmission, router and other communication fields and automotive electronics, aerospace and other fields. 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 supplies has exceeded the primary power supply.

Consider the following factors when selecting the right power module:

Rated power: The recommended power is 30~80% of the rated power of the module power supply.

Operating frequency: The higher the general operating frequency, the smaller the output ripple noise, but the higher the requirements for components and materials, so the higher the efficiency, the more expensive the price.

Power loss and efficiency: under certain conditions of general output power, the smaller the module loss, the higher the efficiency, the lower the temperature rise, and the longer the life.

Package form: under certain power conditions, the volume should be as small as possible to ensure that the system is safe and reliable and has scalability.

Temperature range: Generally have commodity grade, industrial grade, military grade selection, considering the actual need of the working temperature range, from which to choose, different temperature grades used in different materials and processes, different grades of the price difference is large.

Isolation voltage: High isolation voltage can ensure smaller leakage current of the power module, higher safety, reliability, and EMC characteristics.