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寻求输入5V或12V,输出功率达到40W,电压不低于25V的芯片或者电路。
你可以考虑LM3481, TPS43060, LM5122等方案
也可以借助TI工具webench辅助你设计
Hi
建议用12供电,因为这样MOS的电流比较小,你可以选择一些内置MOS的芯片,例如TPS55340: http://www.ti.com/product/tps55340
HI
借助webench仿真得到电路:
虽然芯片Pin脚看来比较多,但是电路比较简单,内置MOS也节约了比较的空间。