Due to the wide variety of booster chips, the choice of booster chips is somewhat difficult for novices. Which parameters should I refer to? What kind of parameters do the various parameters play on the circuit? In this article, Xiaobian will introduce a faster method for selecting DC-DC boost chips.
The first thing to determine is the input and output voltage. In general, the DC-DC input voltage range is wider, but it is still as close as possible to the actual input value, which can achieve higher efficiency. Secondly, whether to isolate the output, according to the design needs, generally the first-stage power supply is better isolated, and the internal is used for different voltage levels, and the non-isolated type can be used to reduce the cost.
Of course, if used as an input or output isolation device, such as opto-isolators that require power supply on both sides. Also look at the ripple and electromagnetic compatibility performance, the general industrial application to choose IEC three levels is enough. Finally, look at the efficiency, the higher the efficiency, the smaller the board's energy consumption, the important thing is that the heat is also small.
From the simplicity of the structure and the surrounding circuit, the DC-DC boost chip can be divided into three types, namely PWM, PWF, and charge pump.
In this paper, Xiao Bian gives a convenient and fast DC boost chip quick selection idea. Through this idea, novices can quickly select the boost chip, which greatly speeds up the design progress. Not only that, designers can also adjust according to the ideas in the text, to the contrary.
Speakers with working frequency response range from 500~5000Hz are called mid range speakers.
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