你知(zhi)道(dao)為什么有些標(biao)稱(cheng)電(dian)流很(hen)大，但是充電(dian)速度卻很(hen)慢嗎？那可能是因為的電(dian)源適(shi)配器不帶電(dian)壓補償。

就拿最快(kuai)的(de)“普(pu)充”5V/2A的(de)電源(yuan)(yuan)適配(pei)器(qi)為例，飛天鷹帶電壓補償的(de)PS10F電源(yuan)(yuan)適配(pei)器(qi)可以說是(shi)最快(kuai)的(de)普(pu)充了。

不用(yong)扯什么4.99，5.01V了(le)，USB電(dian)(dian)(dian)(dian)壓(ya)(ya)規(gui)定的(de)(de)是5V正(zheng)負5%也就是4.75V-5.25V。以飛天鷹電(dian)(dian)(dian)(dian)源適配器(qi)為例，這類充電(dian)(dian)(dian)(dian)器(qi)分兩種標稱電(dian)(dian)(dian)(dian)壓(ya)(ya)5.0V 和5.35V，空載電(dian)(dian)(dian)(dian)壓(ya)(ya)都是5V。隨著輸出(chu)電(dian)(dian)(dian)(dian)流(liu)提升(sheng)，5.0V的(de)(de)在(zai)最(zui)高電(dian)(dian)(dian)(dian)流(liu)輸出(chu)時輸出(chu)電(dian)(dian)(dian)(dian)壓(ya)(ya)5.20-5.25V，5.35V在(zai)最(zui)高輸出(chu)電(dian)(dian)(dian)(dian)流(liu)時輸出(chu)電(dian)(dian)(dian)(dian)壓(ya)(ya)5.30-5.35V。

為(wei)什(shen)么要電(dian)(dian)壓(ya)(ya)(ya)補償，為(wei)了減小線路電(dian)(dian)阻造成(cheng)的壓(ya)(ya)(ya)降，就算用細(xi)一些(xie)的電(dian)(dian)源線也(ye)能保證線路輸(shu)出端電(dian)(dian)壓(ya)(ya)(ya)不低(di)于(yu)5V。沒錯，USB充電(dian)(dian)設備在接口電(dian)(dian)壓(ya)(ya)(ya)低(di)于(yu)5V的時候會主動降低(di)充電(dian)(dian)電(dian)(dian)流，這(zhe)也(ye)是為(wei)什(shen)么雜牌(pai)的充電(dian)(dian)器標稱電(dian)(dian)流大但是充電(dian)(dian)慢的原(yuan)因(yin)，沒有電(dian)(dian)壓(ya)(ya)(ya)補償電(dian)(dian)流越大電(dian)(dian)壓(ya)(ya)(ya)越低(di)，電(dian)(dian)壓(ya)(ya)(ya)低(di)主動降低(di)電(dian)(dian)流5.35V主要還(huan)是隨機附贈使用因(yin)為(wei)對設備要求比較高(gao)，有可能造成(cheng)損(sun)壞。

帶電(dian)(dian)壓補償的(de)電(dian)(dian)源(yuan)(yuan)適(shi)配器，才能保持(chi)充電(dian)(dian)速(su)度，才是真正(zheng)的(de)好電(dian)(dian)源(yuan)(yuan)適(shi)配器。