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TPS65131输出±12V纹波噪声过大

Other Parts Discussed in Thread: TPS65131

1、附图是TPS65131评估板的原理图,我的电路是照抄的评估板,现在测试±12V输出电压时,波动很大,有50HZ的工频纹波,纹波峰峰值有2~3V左右,非常不稳,能帮我看看具体是什么原因吗,我测试整改一下;

2、如果要将输出调整成±15V输出,除了分压电阻需要调整以外还需要改动其他的吗?