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3v稳压电源如何设计？

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3v稳压电源如何设计？

浏览：48次 | 提问时间： 08-01 05:26

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5个答案

骑士先森 08-01 05:26

三端稳压器和稳压二极管的区别在于，三端稳压器是集成芯片，内部有放大、补偿、反馈环节，稳压性能优秀。稳压二极管在需要小电流稳压器的情况下可构成并联稳压器，但稳压效果不是很好，只是能用，输出电流稍大就那个限流电阻的价格都超过稳压芯片。  ASM1117和LM1117没什么差别，只是生产厂家不同，一样可以用。如果有一款LM317（就我所知，LM317没有定压输出的）定压3.3V的三端稳压，是可以输入直接接5V输出就可以直接得到3.3V。

我的霸道妳才愛 08-01 05:35

利用电容通交阻直，通高频阻低频的性质，将通过整流桥的平稳直流中的交流成分滤除，从而得到比较平滑的直流电压。

凉人 08-01 05:43

你好，最低输出稳压值是5伏。所以推荐可调的三端稳压电路LM317。。

Snger 08-01 05:51

本设计通过变压、整流、滤波、稳压四部分来完成。首先利用变压器将220V交流电降到6V，经过二极管整流，电容的滤波得到平稳直流电压，再利用三极管的放大作用提高负载电流，并在电路中使用电压深度负反馈，从而达到稳定输出的目的，利用稳压管的反向击穿来提供三极管基极电压，通过改变电路参数使电路输出达到3V稳定值。

劫心人自梦中苏醒 08-01 06:00

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