anson5479 2015-7-25 01:22
48元！公牛USB插线板测试：相当赞[28P]
[size=4]49元的小米USB插线板备受大家的好评，当然这也给同行带来了竞争压力，作为反击，公牛也推出了首款三口USB插线板，并且价格比小米还便宜一块钱，摆明了要死磕啊。 到底公牛的这个插线板如何呢？一起来看看充电头的评测，整体来说公牛的这款插线板外形跟小米的那款相似度很高，当然做工都很不错，非常值得买入。 虽然没有线补，但内部的一体铜带、微动开关、同步整流电路、智能识别应有尽有。测试纹波低、效率过80%、支持110V电网，各方面性能全面。如果没有小米搅局，一直比较高冷的公牛，如此配置的插线板不可能48元还包邮的。
公牛插线板的开箱：
[/size][align=center][size=4][url=http://img1.mydrivers.com/img/20150724/8a5c258c911e47eeb7012bba166f86e2.jpg][img]http://img1.mydrivers.com/img/20150724/s_8a5c258c911e47eeb7012bba166f86e2.jpg[/img][/url][/size][/align][size=4][/size][align=center][size=4][url=http://img1.mydrivers.com/img/20150724/180889223a884de9b80d7a047300c93a.jpg][img]http://img1.mydrivers.com/img/20150724/s_180889223a884de9b80d7a047300c93a.jpg[/img][/url][/size][/align][size=4][/size][align=center][size=4][url=http://img1.mydrivers.com/img/20150724/2ed37068f12d46dbb71683d83d3d990d.jpg][img]http://img1.mydrivers.com/img/20150724/s_2ed37068f12d46dbb71683d83d3d990d.jpg[/img][/url][/size][/align][size=4][/size][align=center][size=4][url=http://img1.mydrivers.com/img/20150724/799a23d6410349c49822655de62aab5c.jpg][img]http://img1.mydrivers.com/img/20150724/s_799a23d6410349c49822655de62aab5c.jpg[/img][/url][/size][/align][size=4][/size][align=center][size=4][url=http://img1.mydrivers.com/img/20150724/536b3b2072f44b6f96d64b1fdc1b2f15.jpg][img]http://img1.mydrivers.com/img/20150724/s_536b3b2072f44b6f96d64b1fdc1b2f15.jpg[/img][/url][/size][/align][size=4][/size][align=center][size=4][url=http://img1.mydrivers.com/img/20150724/268702320ccd4e7c9f6b2044e9a4c470.jpg][img]http://img1.mydrivers.com/img/20150724/s_268702320ccd4e7c9f6b2044e9a4c470.jpg[/img][/url][/size][/align][size=4][/size][align=center][size=4][url=http://img1.mydrivers.com/img/20150724/b001479f5c6b4e2e99bf840e76a85105.jpg][img]http://img1.mydrivers.com/img/20150724/s_b001479f5c6b4e2e99bf840e76a85105.jpg[/img][/url][/size][/align][size=4][/size][align=center][size=4][url=http://img1.mydrivers.com/img/20150724/85e714aedadb4f9ea37d630f4d93c979.jpg][img]http://img1.mydrivers.com/img/20150724/s_85e714aedadb4f9ea37d630f4d93c979.jpg[/img][/url][/size][/align][size=4][/size][align=center][size=4][url=http://img1.mydrivers.com/img/20150724/15323369428f485dae14c2cf9f2cbfe0.jpg][img]http://img1.mydrivers.com/img/20150724/s_15323369428f485dae14c2cf9f2cbfe0.jpg[/img][/url][/size][/align][align=center][size=4]
[/size][/align]
[size=4][/size][align=center][size=4][url=http://img1.mydrivers.com/img/20150724/eecf9640141c4ace950d1bfb1a440542.jpg][img]http://img1.mydrivers.com/img/20150724/s_eecf9640141c4ace950d1bfb1a440542.jpg[/img][/url][/size][/align][size=4][/size][align=center][size=4][url=http://img1.mydrivers.com/img/20150724/d96731d64da64ef5b8da4344258dbe22.jpg][img]http://img1.mydrivers.com/img/20150724/s_d96731d64da64ef5b8da4344258dbe22.jpg[/img][/url][/size][/align][size=4][/size][size=4][b]实际测试环节：[/b][/size]
[size=4][/size][align=center][size=4][url=http://img1.mydrivers.com/img/20150724/e6eee9a4c9bb462697ca0c27db090bbe.jpg][img]http://img1.mydrivers.com/img/20150724/s_e6eee9a4c9bb462697ca0c27db090bbe.jpg[/img][/url][/size][/align][size=4][/size][align=center][size=4][url=http://img1.mydrivers.com/img/20150724/5ef66566362641f0a5e72b89542b0b9b.jpg][img]http://img1.mydrivers.com/img/20150724/s_5ef66566362641f0a5e72b89542b0b9b.jpg[/img][/url][/size][/align][size=4][/size][align=center][size=4][url=http://img1.mydrivers.com/img/20150724/cc14fcafcc7a4acdb9afa86abc2aa0d4.jpg][img]http://img1.mydrivers.com/img/20150724/s_cc14fcafcc7a4acdb9afa86abc2aa0d4.jpg[/img][/url][/size][/align][size=4][/size][align=center][size=4][url=http://img1.mydrivers.com/img/20150724/1f76f707c82441acae2643687a2cd7ec.png][img]http://img1.mydrivers.com/img/20150724/s_1f76f707c82441acae2643687a2cd7ec.png[/img][/url]
1A输出，纹波73mV，频率30KHz[/size][/align][size=4][/size][align=center][size=4][url=http://img1.mydrivers.com/img/20150724/0c6f2f37c96743ac8a5ec59cda8fce7c.png][img]http://img1.mydrivers.com/img/20150724/s_0c6f2f37c96743ac8a5ec59cda8fce7c.png[/img][/url]
2A输出，纹波79mV，频率36KHz[/size][/align][size=4][/size][align=center][size=4][url=http://img1.mydrivers.com/img/20150724/f9720b3db4c144e2bbb1919029c5d9b3.png][img]http://img1.mydrivers.com/img/20150724/s_f9720b3db4c144e2bbb1919029c5d9b3.png[/img][/url]
可以看出，随着输出电流的增加，纹波没有明显的增加，都是70mV多，100mV以下纹波的电源就算优秀的了，标准要求是不大于200mV，频率随着电流的增加而增大，和其他大部分电源一样。[/size][/align][size=4][/size][align=center][size=4][url=http://img1.mydrivers.com/img/20150724/9ffd5f4629854c6aac9f53a246f85bfd.jpg][img]http://img1.mydrivers.com/img/20150724/s_9ffd5f4629854c6aac9f53a246f85bfd.jpg[/img][/url]
220V输入 空载电压：5.02V，看来公牛还是比较保守的。[/size][/align][size=4][/size][align=center][size=4][url=http://img1.mydrivers.com/img/20150724/ca80ede27d1a40c69071a1d591c6da7a.jpg][img]http://img1.mydrivers.com/img/20150724/s_ca80ede27d1a40c69071a1d591c6da7a.jpg[/img][/url]
1A输出，效率76.3%，属于中等水平吧，算不上优秀。[/size][/align][size=4][/size][align=center][size=4][url=http://img1.mydrivers.com/img/20150724/e950d0c6546a41d9af5bd79a2e792696.jpg][img]http://img1.mydrivers.com/img/20150724/s_e950d0c6546a41d9af5bd79a2e792696.jpg[/img][/url]
2A输出，效率79.1%[/size][/align][size=4][/size][align=center][size=4][url=http://img1.mydrivers.com/img/20150724/3272227adc374c1fb55c910ccdd4fbca.jpg][img]http://img1.mydrivers.com/img/20150724/s_3272227adc374c1fb55c910ccdd4fbca.jpg[/img][/url]
3A输出，效率79.0%[/size][/align][size=4][/size][align=center][size=4][url=http://img1.mydrivers.com/img/20150724/b9a526680d484e00a5ad41d56194ceb1.jpg][img]http://img1.mydrivers.com/img/20150724/s_b9a526680d484e00a5ad41d56194ceb1.jpg[/img][/url]
过载输出，效率76.0%，在输出加了1.25欧姆的电阻，进行过载测试，没有限流保护，而是降压了。[/size][/align][size=4][/size][align=center][size=4][url=http://img1.mydrivers.com/img/20150724/a5bd867ba2ec404dafb93d9e8d6787e3.jpg][img]http://img1.mydrivers.com/img/20150724/s_a5bd867ba2ec404dafb93d9e8d6787e3.jpg[/img][/url]
110V输入 1A输出，效率81.3%，效率同样属于中上等水品。[/size][/align][size=4][/size][align=center][size=4][url=http://img1.mydrivers.com/img/20150724/85b4b429c9ec4327a2669812feb6e337.jpg][img]http://img1.mydrivers.com/img/20150724/s_85b4b429c9ec4327a2669812feb6e337.jpg[/img][/url]
2A输出，效率82.0%[/size][/align][size=4][/size][align=center][size=4][url=http://img1.mydrivers.com/img/20150724/5f90c12be17148208f939a2f35eb443d.jpg][img]http://img1.mydrivers.com/img/20150724/s_5f90c12be17148208f939a2f35eb443d.jpg[/img][/url]
3A输出，效率80.1%[/size][/align][size=4][/size][align=center][size=4][url=http://img1.mydrivers.com/img/20150724/1b7942fd4d1a4c0a8022094454839861.jpg][img]http://img1.mydrivers.com/img/20150724/s_1b7942fd4d1a4c0a8022094454839861.jpg[/img][/url]
过载输出，效率76.5%[/size][/align][size=4][/size][align=center][size=4][url=http://img1.mydrivers.com/img/20150724/9d528dd8fe5c403a8a9404be2b24217c.png][img]http://img1.mydrivers.com/img/20150724/s_9d528dd8fe5c403a8a9404be2b24217c.png[/img][/url]
纹波上，小载时，小米小于公牛，大载时，小米大于公牛，总体来说不相上下。效率上，公牛稍微低于小米。做工非常好，很正规线材和插头，还用了奢侈的电子开关，各种保护。[/size][/align][size=4]
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Marble_Yang 2015-7-25 05:54
usb的供电效率相信不是很多人考虑购买的因素。电源这种东西没人会反复比较指标。工业设计好口碑好是最重要的。公牛卖的是口碑，小米卖的是人气
fengdousaonian 2015-7-27 21:35
[quote]原帖由 [i]Marble_Yang[/i] 于 2015-7-25 05:54 发表 [url=http://174.127.195.202/bbs/redirect.php?goto=findpost&pid=109767536&ptid=6396172][img]http://174.127.195.202/bbs/images/common/back.gif[/img][/url]
usb的供电效率相信不是很多人考虑购买的因素。电源这种东西没人会反复比较指标。工业设计好口碑好是最重要的。公牛卖的是口碑，小米卖的是人气 [/quote]
公牛其实很差的。。靠广告和营销的
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