和之前论坛有个问题现象非常相似,TPS5430 低压9V可以正常启动,高压10V以上启动不起来
10V以上启动输出0.6V左右,芯片不工作。
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Hi
轻载下呢? 或者更换饱和电流更大的功率电感?
同时建议你确认一下layout,建议严格参考datasheet,注意功率回路尽量小,这个会印象带载能力。对于降压芯片而言,输入电压越高,功率电感峰值电流越大。