Hello, in the use of TPS65270, LX pin voltage waveform appears a high pulse, schematic and waveform see attachment, especially to everyone for help, thank you!
KW X:
亲;这是典型电源线退耦不良或PCB布线错误波形,建议传PCB图看看。
Vental Mao:
你的R1064和R1059太大了,10ohm以内就可以了。输出电容22uF就够了
还有你在测试波形时,是用probe的最小环路么
再上传一下你的PCB,用的是4层板么
Johnsin Tao:
回复 Vental Mao:
HI
直接用0欧姆, 再测测看。
注意LX PAD的layout,