A DC-DC converter includes a voltage conversion circuit boosting a voltage of a DC power supply and supplying the voltage to a load, a bypass circuit provided in parallel to the voltage conversion circuit, a drive circuit turning on and off a switching element of the bypass circuit, and a controller outputting a control signal for controlling the voltage conversion circuit and the drive circuit. The logistics assembly includes a logistics strip configured to be coupled to an inside surface the sidewall of the trailer and a splicing plate configured to be coupled to an outside surface the sidewall of the trailer. to 20 C and under elevated humidity. A confirmation message is automatically sent in a similar manner back to the pre-paid payment server. Through vias extend through the package body and the first die side buildup dielectric layer, the through vias being electrically connected to the first die side circuit pattern. Apart from the granulated sugar component, the remaining ingredients of the chocolate-based fat system are conched in the usual manner in keeping with chocolate production techniques.