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PDF KIS-3R33S Data sheet ( Hoja de datos )
| Número de pieza | KIS-3R33S | |
| Descripción | Module KIS-3R33S core chips | |
| Fabricantes | ETC | |
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【F.H.应用笔记】KIS-3R33S 应用
【F.H.应用笔记】KIS-3R33S 应用
F.H.
2012-4-13
目录
1.概述................................................................................................................................................... 2
1.1 主要技术参数：....................................................................................................................2
1.2 其他技术参数：....................................................................................................................2
1.3 极限参数：............................................................................................................................2
1.4 主要特性：............................................................................................................................2
2.典型应用与内部原理....................................................................................................................... 3
2.1 典型应用：............................................................................................................................3
2.2 内部原理：............................................................................................................................3
3.设计要点........................................................................................................................................... 4
3.1 分压电阻：............................................................................................................................4
3.2 电感：....................................................................................................................................4
3.3 外部自举：............................................................................................................................4
4.模块应用........................................................................................................................................... 5
4.1 模块结构：............................................................................................................................5
4.2 应用注意：............................................................................................................................5
4.3 更改为 5V 输出：.................................................................................................................5
4.4 负压原理：............................................................................................................................6
4.5 负电源的升压：....................................................................................................................7
4.6 正负电源：............................................................................................................................7
4.7 低电压负压：........................................................................................................................8
4.8 隔离电源：............................................................................................................................8
4.9 欠压保护+恒压恒流： .........................................................................................................9
4.10 简单版恒压恒流：..............................................................................................................9
4.12 带电流采样放大的恒流源：............................................................................................10
第 1 页 共 10 页
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4.模块应用
4.1 模块结构：
【F.H.应用笔记】KIS-3R33S 应用
4.2 应用注意：
应用时需要分清输入输出引脚，不能跟原先一样接，会不稳定的。
模块无输入时，输出会有灌电流，需要加二极管。
4.3 更改为 5V 输出：
1）原始是 25.5K、10K 分压，输出 0.925V*（25.5K+10K）/10K=3.28V
2）改 1：原始有 3.3K 至 FB，则可以 FB 至 GND 再接 10K 电阻，
输出 0.925V*(25.5K+(10K//13.5K))/ (10K//13.5K)=5.03V
3）改 2：51K 电阻拆掉，换上一个 330K 的电阻
输出 0.925V*(（51K//330K)+10K)/ 10K=5.01V
4）原电路输出端有稳压管，最好去掉，5V 下会有 mA 级漏电。
第 5 页 共 10 页
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| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet KIS-3R33S.PDF ] | |
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