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分享一个TPS54295芯片的LED驱动电路和降压电路

Other Parts Discussed in Thread: TPS54295, TPS54332

本设计采用了一片双通道同步降压芯片TPS54295和一片单通道非同步降压芯片TPS54332实现BUCK拓扑的恒压、恒流和负压生成,并提供多种输出调节模式:1PWM调节使能端;2PWM滤波后调节反馈端;3PWM滤波后调节软启动(SS)端;4、调节反馈电阻。其中,负压产生采用了BUCK拓扑到BOOST拓扑的转变,为了评估电源的效率,加入电流检测电路。附件包含原理图和PCB文件。

原理图和PCB.zip