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DC-DC 转换效率的测量

Other Parts Discussed in Thread: TPS51124

工作遇到的问题,我们使用TI电源芯片TPS51124实现19伏转换5伏,需要测量转换效率。

我们现有的做法:

单独启用TPS51124芯片,测试输入电压/输入电流;输出电压/输出电流。输出电流使用电子负载恒流模式。

请问有什么比较精确的测量方法?

谢谢!