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LM3421: boost效率优化提高

Part Number: LM3421
Other Parts Discussed in Thread: LM3423,

设计规格:输入电压12V,输出36V/1.1A和48V/1.1A,原理图见附件。现在测试36V部分效率90%;48V部分效率88%。请问效率还有没有优化空间,给点优化建议。我看规格书效率可以到93-95%。

我按照snva416a-AN-2011 LM3423 Boost 2 Layer Evaluation Board.pdf搭电路测试,效率也才88-89%,不知道是什么原因。

望解答,谢谢。

lm3421-boost.pdf