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5.1W非调光，高效，非隔离Buck LED驱动参考设计报告
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1 Introduction
This document describes a cost effective power supply utilizing the LYTSwitchTM-0 family
（LYT0006D） in a highly compact buck topology.
This power supply operates over an input voltage range of 90 VAC to 132 VAC. The DC
bus voltage is high enough to support a 38 V output when using a buck topology. In a
buck converter the output voltage must always be lower than the input voltage. The
output voltage is also limited by the maximum duty cycle of the LYTSwitch-0， which also
requires the input voltage to be larger than the output voltage.
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