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LM25118: LM25118输出24V,空载正常,带负载不正常

Part Number:LM25118

 电路图如下,输入20v,输出24v,空载正常,负载500ma左右时,输出电压从24v到13v来回变化,不知道什么原因,尝试过调小输出电容,修改限流电阻,修改comp阻容参数均无效果,求指导

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Taylor:

您好,

已经收到了您的案例,调查需要些时间,感谢您的耐心等待。

,

meng zhang:

感谢,麻烦尽快,这里调试急需解决

,

meng zhang:

我试过了调整电感大小,调整输出电容大小,调整频率。现在看电压低了就启动不起来,能听到电感声音。电压超过20v能正常工作。负载电流大概1a左右

,

Links:

遗憾的是,原理图的分辨率太低,无法识别零部件号等细节。

当输出压降出现时,您能否提供一些示波器图(显示5-8个切换和5-10ms):

– VIN / VOUT

-电感器的两侧

– COMP / SS

-电感器电流(如果可能)

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Hebrew
Polish

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Hindi
Portuguese

Catalan
Hmong Daw
Romanian

Chinese Simplified
Hungarian
Russian

Chinese Traditional
Indonesian
Slovak

Czech
Italian
Slovenian

Danish
Japanese
Spanish

Dutch
Klingon
Swedish

English
Korean
Thai

Estonian
Latvian
Turkish

Finnish
Lithuanian
Ukrainian

French
Malay
Urdu

German
Maltese
Vietnamese

Greek
Norwegian
Welsh

Haitian Creole
Persian

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