Circuit and method for realizing power-off by pressing SSB button in Limphome

The circuit comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a triode Q55 and a triode Q57, one end of the resistor R1 is grounded, the other end of the resistor R1 is connected with the resistor R2, one end of the resistor R3 is grounded, the other end of the resistor R3 is connected with the resistor R4, the two ends of the resistor R1 are connected with a switch SSB1 in parallel, the two ends of the resistor R3 are connected with a switch SSB2 in parallel, and the switch SSB2 is connected with the triode Q55. On the basis of an original scheme, controllable power-off can be achieved by adding part of passive devices, long-press SSB power-off can be achieved by adjusting and increasing R284, 4819 and C598 values at the same time, the long-press time can be adjusted to be more than 3 seconds, and convenience and safety of products are improved. 本发明公开了一种实现Limphome下按SSB按钮下电的电路，包括电阻R1、电阻R2、电阻R3、电阻R4、三极管Q55和三极管Q57，所述电阻R1的一端接地，电阻R1的另一端连接电阻R2，电阻R3的一端接地，电阻R3的另一端连接电阻R4，电阻R1的两端并联有开关SSB1，电阻R3的两端并联