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LM2587ADJ 12V转48V问题

Other Parts Discussed in Thread: LM2587

ti工程师:

     你好!我用LM2587ADJ 12V升24V,12V升48V,升24V的输出带1A负载,除了发热,峰峰值为600mV以为再工作正常。但升48V的,带0.1A左右的负载,电路就有响声,而且用示波器测试出现了锯齿波,负载增大到0.5A时,响声更大,而且锯齿波的幅值也随着增大,示波器显示峰峰值3.4V,不知为何,是我电感太小还是我的肖特基二极管SS36使用不当?