This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TPS54260 输出异常

Other Parts Discussed in Thread: TPS54260

Hi TI FAE:

     你好!TPS54260在使用过程中有些问题,请帮忙看看:     

1,之前版本使用4层板块,该电路在10~46V间,VCC负载3.3W,VCC=5.1V可正常输出。现为现PCB板更改为2层板,对应的布局不变,现出现10~32V时,空载电压均正常,负载3.3W时VCC输出5.1V正常,大于32V,5.1V会往下掉,电压调至2.6V,这个是为什么?

2、将R62电阻值更换为100K,对应的开关1Mhz左右,部分的VCC输出不良品可恢复至正常,另一部产品负载3.3W时VCC还是输出不良,这个是为什么?