选用敦泰的FT6610,做了几套方案与大家共享.
1:市电220V,驱动30个LED草帽灯,输出电流19.3mA,具有76%的效率,所需元器件少:
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2:市电220V,隔离方案,具有0.995的功率因数和0.09的谐波:
500) {this.resized=true; this.width=500; this.alt='这是一张缩略图,点击可放大。\n按住CTRL,滚动鼠标滚轮可自由缩放';this.style.cursor='hand'}" onclick="if(!this.resized) {return true;} else {window.open('http://u.dianyuan.com/bbs/u/77/2704741242197727.jpg?x-oss-process=image/watermark,g_center,image_YXJ0aWNsZS9wdWJsaWMvd2F0ZXJtYXJrLnBuZz94LW9zcy1wcm9jZXNzPWltYWdlL3Jlc2l6ZSxQXzQwCg,t_20');}" onmousewheel="return imgzoom(this);">
500) {this.resized=true; this.width=500; this.alt='这是一张缩略图,点击可放大。\n按住CTRL,滚动鼠标滚轮可自由缩放';this.style.cursor='hand'}" onclick="if(!this.resized) {return true;} else {window.open('http://u.dianyuan.com/bbs/u/77/2704741242197736.jpg?x-oss-process=image/watermark,g_center,image_YXJ0aWNsZS9wdWJsaWMvd2F0ZXJtYXJrLnBuZz94LW9zcy1wcm9jZXNzPWltYWdlL3Jlc2l6ZSxQXzQwCg,t_20');}" onmousewheel="return imgzoom(this);">
3:市电220V,输出电压85V,电流200mA,效率91%:
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4:市电110V,输出电压50V,电流200mA,效率90%:
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相关FT6610信息,请访问:
http://www.focaltech-systems.com/display.asp?id=81
随贴附上FT6610的自动计算软件:
2704741242198332.xls