做了一个样板,用TPS23750 为主控芯片,目标是输出12V 1A,可是,焊接好,输出是19V,空载,什么原因?初次做电源,请教问题,谢谢!
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.
做了一个样板,用TPS23750 为主控芯片,目标是输出12V 1A,可是,焊接好,输出是19V,空载,什么原因?初次做电源,请教问题,谢谢!
Weiming,
TPS23750是满足802.3AF标准的PD芯片,可实现隔离与非隔离的方案,请问是使用BUCK还是FLYBACK的拓扑?如果是FLYBACK,电压偏高的话,那么要检查下变压器的设计是否正确?匝数是否过多?如果是BUCK的话,可通过调节电阻得到12V。