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https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/990721/tps53681-when-the-first-power-on-no-configuration-is-the-output-no-voltage
第一次上电时、没有配置、输出是否为无电压？
它是通过 PMBus 配置的吗？
两个通道的默认值均为0.5V、可由 PMBus 通过 MFR_SPECIFIC_11命令进行配置。
