Power Switching Method for TV and Set Top Box ----- Power Supply Controller

Power Switching Method for TV and Set Top Box, Power Supply Controller Keywords: power switching method for television and set top box Nowadays, there are now a digital overall conversion work, and after conversion, the client is configured to configure a digital TV set top box. In this way, each time you use a TV, in addition to operating the power switch for the TV, you have to operate the power switch of the set-top box, especially when the position of the set-top box is not very convenient, it is very inconvenient. Here, a method of making a power outlet of a set-top box and a television switch can be described well to solve the problem. As shown in the drawings, the production circuit is mainly composed of the following three parts. 1. Current Transformer The function of the current transformer is to detect the current signal of the power circuit when the television is working, and can be restructured by a small power transformer of about 2 to 3VA. For the sake of simplicity, here: find a home leakage switch, remove the zero sequence current transformer inside (generally the transformer is not damaged, can be utilized), then use plastic single or multi-strand (wire cross section by TV The working current of the machine is determined, wore around 20 to 30, as the original winding, the specific number of turns is determined by the number of turns of the original side of the transformer, but is not required. In order to detect if the new windings are required, the primary winding struts can be connected to the power supply line, and the sub-voltage is measured with the multimeter, and there is 4V left and right. 2. Rectifier filter circuit The rectifier filter circuit adopts the simplest half-wave rectification in the drawings. If the voltage supplied from the subsideral side of the current transformer is low, it is not enough to drive the latter rectifier to change the half-wave rectification to half wave pressure rectification. Generally, small solid state relays have 3 to 10 mA of currents that can be driven. 3. AC solid state relay AC solid state relay is a two-way thyristor, a pressure of 500 V, a light coupling drive. The communication solid state relay of the current 1a can satisfy the load requirements of the set top box. Since the simple components are rare, the circuit component assembly can be pressed, find a slightly internal space, can load the multi-purpose power outlet of the circuit component, transform the structure inside the socket, then press the circuit to connect the socket, use it Convenient. Similarly, the method can also be used on the TV receiver and its equipment.

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