肖特基二极管是什么?

肖特基二极管也是二极管,那么就是一种具有单向导电性的器件.只是其最显著的特点为反向恢复时间极短,所以其多用作高频、低压、大电流整流二极管、续流二极管、保护二极管.希望可以帮到你.

目前通用的电子元器件基本上都有帖片封装的了.
肖特基二极管21DQ04对应的帖片型号：SS24/A、B240/A、SK24/A等等
用钽电容体积更小些,钽电容的封装与容量可参考厂家的资料：
至于电阻,20欧姆,电流500毫安左右,功率就是：P=0.5*0.5*20=5W.
如果连续电流是500毫安,至少选择10W的功率电阻,并注意散热；如果平均电流很小,而电大电流是500毫安,选用5W的功率电阻.但功率电阻是没有帖片的.
（保护部分用怎么大功率的电阻,为何不用电流或电压采样用电子保护装置?）

所有的整流二极管的反向击穿电压都高于5V,肖特基二极管常见型号的反向击穿电压一般为20-200V.选取器件时要看电路的峰值电压值来选取二极管的反向击穿电压（耐压）,一般来讲,耐压越高的二极管的正向压降要比耐压低的大一些,所以大电流工作的电路尽量选用耐压值低（正向压降小）的.至于二极管的整定电流值的选择,常规就要看安装空间和安装形式来选,越大越好.从理论上选,那么就要看需整定电路的占空比,工作频率以及耦合电感峰值电流的大小来选取二极管的整定电流大小,一般保险起见为计算值的2-3倍的富余量为佳.

Micrel Inc. (Micrel Inc.) Before the introduction of two wide input range of comprehensive integrated Schottky diode switches and a new boost regulator MIC2605 and MIC2606, two facilities were operating frequency of 1.2MHz (MIC2605) and 2MHz
(MIC2606), can provide less than 0.5A switch current, is the latest introduction of Micrel MIC2601 / 2 product line to add equipment, dedicated to TV tuners, broadband communications, thin film transistor liquid crystal display (TFT-LCD) bias supply, is the output regulator, single-ended primary inductance converters, DSL applications and local boost regulators.
MIC2605 / 6 is a combination of wide input range (4.5-20V) integrated switching and Schottky diodes boost regulator, the output voltage up to 40V. Both devices are suitable for a wide variety of applications. 0.5A switch and Schottky diode integrated designers bring many important benefits, including high power density, fewer external components and lower material costs. In addition to ease of use has strong things, these two devices can provide up to 2MHz PWM frequency, and with high efficiency.
The use of small ceramic capacitors, equipment to enhance the stability, so that the equipment has fewer external components, as well as lower costs related materials. Both solutions for small footprint devices, performance is stable 2mm × 2mm MLF (R) -8 lead-free product portfolio