引脚图标示vin,bst,sw,fb,en是什么意思？一、这是开关电源芯片控制脚标志：1、en 使能脚，一般高电平使芯片工作。2、vin 电源输入3、bs 自升压脚，4、sw 开关控制脚5. Vin ： 稳压前电压输入端 vout ： 稳压后电压输出端 gnd ： 接地（公共端） vin 与gnd 构成电压输入回路，vout 与gnd构成电压输出回路 扩展资料 一、根据 电路图 连接实物图注意点： 1.
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