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TPS54360: 关于noswitching supply current的问题

Part Number: TPS54360

在数据手册中,关于无开关电流的解释是在FB端口断开反馈回路,加0.9V电压,测量输入电流,即可得到该电流值。我想请问一下,这个测试环境是在外围电路存在时仅断开反馈回路的情况下吗?需要连接负载吗,这个电流参数和直接在空载时测量输入电流有什么区别呢?