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LM5116外加LM358恒流工作时不稳定

Other Parts Discussed in Thread: LM358, LM5116, LM5117

输入24-70V,输出13.8V7A,用LM5116外加LM358恒流电路,频率150K,恒压工作时系统稳定,恒流时声音大,波形不稳定,下MOS驱动工作一会,停一段时间,频率几百HZ,所以声音很明显,调节358环路没有改变,不知有没有人碰到类似问题?