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QVicor的DC-DC转换器具有哪些保护设计？
AEach converter type could be differences. Generally the common protection features are output short ciruit, output current limit, output over voltage, input undervotlage and over voltage, thermal shutdown, etc.
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Q提高DC-DC转换效率需要注意的关键要素？
AIf the question is about designing a converter wth high efficiency, then the switching action is the key. The switching loss would be most important. How to reduce the switching loss? There are too many trade-offs to consider. The point is how to turn on/off the FETs with minimum loss? ZVS or ZCS or both.
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Q能效比能达多高？
A 请问您是否是指电源效率？要看具体的规格。Vicor产品的ZVS和ZCS控制有最低的开关损耗，可以实现较高效率。
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Q电源输入电压骤降导致的电源输出跟着降低，怎么处理后端电路使输出电源稳定
AWhy the output drops? Is it due to the loss of energy supplied by the source? If yes, then obviously you need energy to solve the problem. Where will be the energy come from?
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QDC-DC电源模块进行设计时，在减少纹波电压需要注意的关键点？
AReduce the high frequency circuit loops (both common mode and differential mode) using bypassing capcitors close to the converter. Then apply proper input and output filters.
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QVicor DC-DC 电源模块目前支持最大的输出功率？
A Vicor产品大部分产品支持并联扩容，可以灵活增大输出功率。具体可以按输入输出规则咨询工程师。
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QVicor DC-DC 电源模块需要另外自行加散热器吗？
AGenerally yes. You need proper heatsinking to keep the temperature at a reasonable level.
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Q为什么需要DC-DC模块电源？
A 模块化的产品可以降低设计难度，减少项目的测试验证时间和可靠性问题，加速产品开发周期。
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QVicor的模块化DC-DC主要应用领域是什么？
A Vicor电源模块在通信系统，数据中心，铁路，机器人，ATE，测试测量设备，能源管理，航空航天等各类高可靠性高性能场景都有广泛的应用。
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Q是否有关于DC-DC系统设计的优势说明或应用案例？
A 可以关注Vicor官网或者微信公众号，有更多案例可以参考。
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Q你们的集成DC/DC的数字隔离效率能做到多少？
A 非稳压的等比例变换器BCM可以到98%左右的效率。稳压的DCM VIA封装的最高到96%。
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QDC-DC 前后级电容选型是依照什么规律来的？ 现在都是加个钽电容，一个大电容，一个小电容！
A 输入端的可以参考Vicor官网的DCM user guider，里面有对输入滤波电路的理论分析和计算。输出端主要考虑控制器的环路稳定性和纹波要求。一般陶瓷电容主要是为了吸收高频噪声。
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QDC-DC电源模块有什么常见故障，怎么解决？
AThe common failure is due to: inadequate thermal design, without transient and surge protection, stability issue due to interation with source impedance, etc. You need to understand what is the nature of failure and address it accordingly.
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QDC-DC输出纹波噪声偏大该怎么办？
AYou need to understand why the ripple was higher firstly. If your PCB layout and noise bypassing scheme has been already good, then the ripple is due to the converter itself, and you can only add further output filter to suppress it down.
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QDCDC的模块化的优势是什么？单独设计和模块化设计的区别在哪里？
AYou can refer to this seminar video that it pointed out some advantages of using modular converters over designing a converter from the beginning using discrete solution.
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Q模块启动后，输出电压偏低怎么办？
AYou need to undertand why the output was low firstly. Was it due to too much load? Was it due to your source was unawarenessly blocked? Was it due to some components were failed sinking the output current? Was it due to the enable/disable fuction was not proper?
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QDC/DC模块频繁烧毁该怎么解决？是怎么回事？
AIf you are sure your input protection was already enough to supress any possible transients and surges, the themal design was enough, nothing wrong with your schematic and components applied, the source impedance was low enough, the load interaction with the converter was proper, then it could be due the the converter was not good enough, otherwise you need to re-think of the above possilbities.
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Q同类厂商也有做这个的，你们和他们比有什么优势
A Vicor是模块电源行业领导者。在效率、功率密度、产品可靠性都有很大优势。同时有丰富的辅助设计工具可以使用。应用覆盖范围广泛。
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Q如何选择DC/DC模块电源封装形式？
A 主要考虑系统的结构和尺寸。满足尺寸要求和散热要求。
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Q多个模块化电源的并联，输入端（即上一级的DCDC的负载端）的电容都是并联的，那么如果很多个DCDC的电容并联，会不会影响上一层级的电源的负载电容的参数选择？
AThis is an important point to consider. Each downstream converter will present some capacitance and negative impedance to the upstream converter output.
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