双DC-DC变换器
上传时间： 2013-10-23
上传用户：woshiayin
发现并证明了在设计多路大电流DC-DC变换器时,如果对每个工作模块进行有效隔离可避免自激情况发生。这个发现可更好地指导设计大电流多路DC-DC变换器。
上传时间： 2013-10-23
上传用户：stst
电源管理芯片选用思考 • 选用生产工艺成熟、品质优秀的生产厂家产品; • 选用工作频率高的芯片,以降低成本周边电路的应用成本; • 选用封装小的芯片,以满足便携产品对体积的要求; • 选用技术支持好的生产厂家,方便解决应用设计中的问题; • 选用产品资料齐全、样品和DEMO 申请用易、能大量供货的芯片; • 选用产品性能/价格比好的芯片;
上传时间： 2014-01-12
上传用户：s363994250
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
Advancements in board assembly, PCB layout anddigital IC integration have produced a new generationof densely populated, high performance systems. Theboard-mounted point-of-load (POL) DC/DC power suppliesin these systems are subject to the same demandingsize, high power and performance requirements asother subsystems. The rigorous new POL demands aredifficult to meet with traditional controller or regulatorICs, or power modules.
上传时间： 2014-12-24
上传用户：lbbyxmraon
A number of conventional solutions have been available forthe design of a DC/DC converter where the output voltageis within the input voltage range—a common scenarioin Li-Ion battery-powered applications—but none werevery attractive until now. Conventional topologies, suchas SEPIC or boost followed by buck, have numerousdisadvantages, including low effi ciency, complex magnetics,polarity inversion and/or circuit complexity/cost. TheLTC®3785 buck-boost controller yields a simple, effi cient,low parts-count, single-converter solution that is easyto implement, thus avoiding the drawbacks associatedwith traditional solutions.
上传时间： 2013-10-21
上传用户：ljt101007
Speed and accuracy don’t always go hand-in-handin DC/DC converter systems—that is, until now. TheLTC3811 is a dual output, fi xed frequency current modeDC/DC switching regulator controller designed for one oftoday’s most demanding power supply applications: highcurrent, low voltage processor core supplies.
上传时间： 2013-11-21
上传用户：aix008
The LTM4601 DC/DC μModule regulator is a completehigh power density stepdown regulator for up to 12Acontinuous (14A peak) loads. The device is housed ina small 15mm ¥ 15mm ¥ 2.8mm LGA surface mountpackage, thus the large power dissipation is a challengein some applications. This thermal application note willprovide guidelines for using the μModule regulator inambient environments with or without air fl ow. Loadcurrent derating curves are provided for several inputvoltages and output voltages versus ambient temperatureand air fl ow.
上传时间： 2013-10-19
上传用户：bakdesec
摘要:简述了在系统可编程电源管理芯片ispPAC-POWER1208的结构、功能和开发环境PAC-De2signer,给出了基于该器件的多电压系统的电源管理应用实例,并主要讨论了电源时序管理和监控的实现,比较了对供电异常情况处理的两种方法,同时简要介绍了设计仿真。该器件可使多电压供电系统的设计大为简化,缩短开发时间。 关键词:可编程逻辑器件;电源管理;多电压供电;时序
上传时间： 2013-12-29
上传用户：zyt
When a system designer specifies a nonisolated dc/dc powermodule, considering the needed input voltage range isequally as important as considering the required performanceattributes and features. Generally, nonisolated moduleshave either a narrow or a wide input voltage range. Narrowinputmodules typically have a nominal input voltage of3.3, 5, or 12 V. For systems that operate from a tightlyregulated input bus—such as those that do not use batterybackup—a narrow-input module is often adequate sincethe input remains fairly stable.Offering greater flexibility, wide-input modules operatewithin a range of 7 to 36 V, which includes the popular12- or 24-V industrial bus. This enables a single module tobe used for generating multiple voltages. These modulesare ideal for industrial controls, HVAC systems, vehicles,medical instrumentation, and other applications that usea loosely regulated distribution bus. In addition, systemspowered by a rectifier/battery charger with lead-acidbattery backup almost always require wide-input modules.System designers who choose power supplies may wantto take a close look at the latest generation of wide-inputdc/dc modules.
标签： Wide-input modules offer dc
上传时间： 2014-12-24
上传用户：dragonhaixm
