5V supply circuit of intelligence heating rod

The utility model discloses a 5V supply circuit of intelligence heating rod, including the 220V alternating current, TL431 reference voltage source U3, optoelectronic coupler U1, SD6832 chip U2, diode D1, diode D3, diode D4, diode D6, diode D7, diode D8, diode D9, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance R15, resistance R16, resistance R17, resistance R18, resistance R19, electric capacity C2, electric capacity C9, electric capacity C10, transformer T1, transformer T2, inductance L1, the utility model discloses with low costs, output 5V voltage stabilization, and circuit structure is simple, long service life, and the interference killing feature is strong. 本实用新型公开了智能加热棒的5V供电电路，包括220V交流电、TL431基准电压源U3、光电耦合器U1、SD6832芯片U2、二极管D1、二极管D3、二极管D4、二极管D6、二极管D7、二极管D8、二极管D9、电阻R1、电阻R2、电阻R3、电阻R4、电阻R5、电阻R6、电阻R7、电阻R15、电阻R16、电阻R17、电阻R18、电阻R19、电容C2、电容C9、电容C10、变压器T1、变压器T2、电感L1，本实用新型成本低、输出5V电压稳定，且电路结构简单，使用寿命长，抗干扰能力强。