LTC1700 MCU控制 行動電源 分享 - 行動電源
By Gary
at 2013-11-06T00:28
at 2013-11-06T00:28
Table of Contents
今天幫朋友訂的行動電源收到了
http://i.imgur.com/nqsyYuR.jpg
http://i.imgur.com/VUh28VX.jpg
大小比一比~~
http://i.imgur.com/eKtDAB8.jpg
電路板正面右邊就是這個行動電源的賣點MCU
研究了一下,MCU為 SH79F166A 8bit
充電採用XL4003E1 DC/DC 降壓和MCU 控制進行充電工作
(以充電時發熱元件判斷)
http://i.imgur.com/U1BKsZk.jpg
這裡還有一個有趣功能,通過跳焊點可以調整充電上限電壓跟放電下限電壓
預設是 4.2 / 2.8 剛好適合 ncr18650 使用
http://i.imgur.com/JbwHUQj.jpg
電路板背面可以看到 LTC1700ic 仔細看有一個電容用3D焊接......
進行轉換效率測試.....
http://i.imgur.com/bAXpdaw.jpg
這次使用4線法測試,排除線阻影響
輸出500mA 效率91.48%
1A 效率94.33% 同條件 CXY LTC1700 效率91% AILI 效率85%
1.5A 效率93%
1.8A 效率93%
值得一提的是這棵行動電源輸出電壓很穩定
空載5.11V 500mA 5.06V 1000mA 5.045V 1500mA 5.026V
滿出乎預料的!!本來預測是會比CXY LTC1700稍遜
--
http://i.imgur.com/nqsyYuR.jpg
http://i.imgur.com/VUh28VX.jpg
大小比一比~~
http://i.imgur.com/eKtDAB8.jpg
電路板正面右邊就是這個行動電源的賣點MCU
研究了一下,MCU為 SH79F166A 8bit
充電採用XL4003E1 DC/DC 降壓和MCU 控制進行充電工作
(以充電時發熱元件判斷)
http://i.imgur.com/U1BKsZk.jpg
這裡還有一個有趣功能,通過跳焊點可以調整充電上限電壓跟放電下限電壓
預設是 4.2 / 2.8 剛好適合 ncr18650 使用
http://i.imgur.com/JbwHUQj.jpg
電路板背面可以看到 LTC1700ic 仔細看有一個電容用3D焊接......
進行轉換效率測試.....
http://i.imgur.com/bAXpdaw.jpg
這次使用4線法測試,排除線阻影響
輸出500mA 效率91.48%
1A 效率94.33% 同條件 CXY LTC1700 效率91% AILI 效率85%
1.5A 效率93%
1.8A 效率93%
值得一提的是這棵行動電源輸出電壓很穩定
空載5.11V 500mA 5.06V 1000mA 5.045V 1500mA 5.026V
滿出乎預料的!!本來預測是會比CXY LTC1700稍遜
--
Tags:
行動電源
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at 2013-11-08T19:10
at 2013-11-08T19:10
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