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News

新闻资讯

如何选择好的电源适配器?

2021-09-15

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  随着智能设备功能的不断增加,其电量消耗也开始越来越快。人们开始习惯于随身携带便携式充电器或电源适配器。对于很多人来说,对于电源适配器的概念只停留在充电器的阶段,但实际上电源适配器是一种变压器,被大量应用在充电器上。对于电源适配器不熟悉的人往往需要面对的,是采用哪种电源适配器来进行充电。

  电源适配器的参数多种多样,因此并不能随意使用适配器来进行充电。在选择电源适配器之前,首先要确定三个适配条件。

  第一、适配器的接口与设备匹配;

  第二、输出电压必须与负载(移动设备)的额定输入电压相同,或者在负载(移动设备)可承受的电压范围,否则,可能烧毁负载(移动设备);

  第三、电源适配器的输出电流应等于、大于负载(移动设备)的电流,以提供足够的电力;下面就来对上述的三条适配条件进行分析。

  第一、不匹配的接口在没有专业知识的情况下千万不要乱插,否则会发生危险。

  第二、对于为什么需要电压一致,从原理上讲是这样的——电压不足,不足以驱动负载,电池无法正常充电,说的通俗点就是供不应求。

  第三、对于为什么需要这样的电流配置,这要涉及到电路的原理,大家都知道电源是有内阻的,内阻越大损耗越大。因此厂家在生产这个适配器的时候就会根据内阻大小,确定空载输出电压在一定范围内,而电压临界值对应的电流临界值即为我们看到的电流标称值,电流标称值越大说明适配器带载能力越好。所以选择电流略大的适配器不但不会伤害电池,反而会让充电变得更快。

这里是占位文字

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