在航天等空间产品中使用的分布式供电系统中，总体电路一般只提供27~30 V的直流一次电源，各单机产品大多采用DC/DC模块将该一次电源转换为所需的二次电源，并实现一次地与二次地的隔离。分析了INTERPOINT公司的DC/DC模块的输入端反接后，输入电压对DC/DC模块、电源保护滤波电路及负载的影响，通过仿真与验证试验，得出电源模块输入端反接后单机产品中电源保护电路发生作用，对产品中负载无影响，可以继续使用。电源模块失效分析对航天产品中电源模块中出现类似的故障后的处理提供了参考。
上传时间： 2013-11-05
上传用户：kangqiaoyibie
本书内容翔实、精炼，介绍了进行电源设计必须了解的几乎所有相关的知识，包括以下几个方面。 拓扑概述——常用的15种拓扑；功率开关管的最大电流应力和最大电压应力；对于有确定的输入输出电压、输出功率的功率开关管，最佳拓扑的选择；最佳拓扑的选择；最佳功率开关管的选择。 高频磁原理——铁氧体磁心磁带、集肤效应和邻近效应损耗。 变压器设计——与频率、磁密度、铁心面积和绕线面积以及拓扑有关的函数公式推导；磁心、线圈、变压器总损耗，以及温升的计算；使用常用拓扑的变压器设计实例。 直流电流偏置电感设计——导通直流偏置电流的电感设计。 磁放大器、缓冲器的设计以及谐振变换器。 反馈环稳定性。 主要拓扑的精确波形。 本书第二版增加了该领域内目前最受关注的关于电流的章节，包括功率因数校正、荧火灯使用的高频镇流器和笔记本电脑设计的低输入电压电源。 内容简介本书从最基本的开关变换器分析入手，系统地阐述开关电源电路（设计）的功率转换和脉宽调制原理、驱动电路与闭环反馈的稳定性及磁性元件的设计原则；对各功率变换器器件的参数选择和变换器各部分波形进行了定量分析；利用闭环反馈振荡机理，详细讨论了开关电源电流、电压环反馈系统的稳定性；论述高频开关电源在功率因数校正技术、软开关技术，以及电子镇流器技术等方面的最新动态和发展趋势。内容上不仅对各功率变换器的原理有详尽、系统的论述，同时给出多种新型的拓扑及对应电路反馈环的设计实例。 本书可以作为学习、研究高频开关电源的高校师生的教材，也可作为从事开关电源设计、开发的工程师的设计参考资料。
标签： Switching_Power_Supply_Design Second_Edition 开关电源设计
上传时间： 2013-11-21
上传用户：13788529953
基于高频谐振电路研制的高压脉冲电容器充电电源, 采用IGBT 构成电源的软开关电路和闭环变频控制充电电流的方式。对输出端负载大范围变化引起的谐振频率漂移, 采用微调开关时间, 保证了变换器开关零切换, 显著降低了导通、关断时IGBT 的损耗.
上传时间： 2014-12-24
上传用户：aeiouetla
开关电源（直流变换器）的类型很多，从输入输出有无隔离角度，开关电源主回路可以分为隔离式与非隔离式两大类型。这两种类型中又各自包含有不同的电路拓扑种类。每种结构都有各自的特点，适用于不同的应用场合，下边将对各种开关电源拓扑结构简要叙述和比较。
上传时间： 2013-11-20
上传用户：cjh1129
Linear Technology offers a variety of devices that simplifyconverting power from a USB cable, but the LTC®3455represents the highest level of functional integration yet. The LTC3455 seamlessly manages power flowbetween an AC adapter, USB cable and Li-ion battery,while complying with USB power standards, all from a4mm × 4mm QFN package. In addtion, two high efficiencysynchronous buck converters generate low voltage railswhich most USB-powered peripherals require. TheLTC3455 also provides power-on reset signals for themicroprocessor, a Hot SwapTM output for poweringmemory cards as well as an uncommitted gain blocksuitable for use as a low-battery comparator or an LDOcontroller. The PCB real estate required for the entire USBpower control circuit and two DC/DC converters is only225mm2.
上传时间： 2013-11-02
上传用户：名爵少年
完全替代原装国半DC-DC产品LM2596系列产品，性价比优势！
上传时间： 2013-10-24
上传用户：moshushi0009
DC/DC 升压IC：The FP6291 is a current mode boost DC-DC converter. Its PWM circuitry with built-in 0.25 Ω power MOSFET make this regulator highly power efficient. The internal compensation network also minimizes as much as 6 external component counts. The non-inverting input of error amplifier connects to a 0.6V precision reference voltage and internal soft-start function can reduce the inrush current. The FP6291 is available in the SOT23-6L package and provides space-saving PCB for the application fields.
上传时间： 2013-11-07
上传用户：3294322651
Automobile electronic systems place high demands ontoday’s DC/DC converters. They must be able to preciselyregulate an output voltage in the face of wide temperatureand input voltage ranges—including load dump transientsin excess of 60V and cold crank voltage drops to 4V. Theconverter must also be able to minimize battery drain inalways-on systems by maintaining high effi ciency over abroad load current range. Similar demands are made bymany 48V nonisolated telecom applications, 40V FireWireperipherals and battery-powered applications with autoplug adaptors. The LT3437’s best in classperformancemeets all of these requirements in a small thermallyenhanced 3mm × 3mm DFN package.
上传时间： 2013-10-15
上传用户：stampede
To this day, Power over Ethernet (PoE) continues to gainpopularity in today’s networking world. The 12.95Wdelivered to the Powered Device (PD) input supplied bythe Power Sourcing Equipment (PSE) is a universal supply.Each PD provides its own DC/DC conversion from anominal 48V supply, thus eliminating the need for a correctvoltage wall adapter. However, higher power devicescan not take advantage of standard PoE because of itspower limitations, and must rely on a large wall adapteras their primary supply. The new LTC4268-1 breaks thispower barrier by allowing for power of up to 35W for suchpower-hungry 2-pair PoE applications. The LTC4268-1provides a complete solution by integrating a high powerPD interface control with an isolated fl yback controller.
上传时间： 2014-12-24
上传用户：jasson5678
Many telecommunications and computing applicationsneed high effi ciency step-down DC/DC converters thatcan operate from a very low input voltage. The highoutput power synchronous controller LT3740 is idealfor these applications, converting input supplies rangingfrom 2.2V to 22V to outputs as low as 0.8V with loadcurrents from 2A to 20A. Applications include distributedpower systems, point-of-load regulation and conversionof logic supplies.
上传时间： 2013-11-05
上传用户：zhf01y
