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您好，我按照TI的tps23754参考设计做了一个POE模块，但做好后发现输出电压有4.4V 45.5HZ三角波干扰，请问是环路稳定性问题还是EMI出了问题？谢谢！
附上输出交流分量图
还有忘记说了，当输出电压往下掉的时候，开关电源是停振的，无PWM信号输出给MOS管。而tps23754的CTL引脚出现同频率的方波，附上波形图，黄色是输出交流分量，蓝色是CTL交流分量。
