Power conversion circuit and circuit board

1. A power conversion circuit to convert a voltage from one voltage level to another, comprising:

an input port;

an output port, the input port of the power conversion circuit being an output port of one power conversion circuit previous in sequence to the power conversion circuit, the output port of the power conversion circuit being an input port of one power conversion circuit next in sequence to the power conversion circuit;

a main body circuit;

a first solder bridge arranged between the input port of the power conversion circuit and the main body circuit of the power conversion circuit; and

a second solder bridge arranged between the output port of the power conversion circuit and the main body circuit of the power conversion circuit.

2. The power conversion circuit as described in claim 1 , wherein the first solder bridge comprises a first terminal and the second terminal spaced from the first terminal, the second solder bridge comprises a third terminal and a fourth terminal spaced from the third terminal, the first terminal is electrically connected to the input port, the second terminal is electrically connected to the main body circuit, the third terminal is electrically connected to the output port, and the fourth terminal is electrically connected to the main body circuit.

3. The power conversion circuit as described in claim 1 , wherein when the first solder bridge and the second solder bridge are open, the connection between the input port and the main body circuit and the connection between the output port and the main body circuit are cut off.

4. The power conversion circuit as described in claim 1 , wherein when the first solder bridge and the second solder bridge are closed, the input port, the main body circuit, and the output port are electrically connected to each other.

5. The power conversion circuit as described in claim 1 , wherein when the first solder bridge and the second solder bridge are open, the input port is connected to a DC power supply to receive a predetermined voltage, and the voltage and the current of the power conversion circuit is tested by a multimeter.

6. The power conversion circuit as described in claim 2 , wherein when the first terminal and the second terminal are disconnected from each other, and third terminal and the fourth terminal are disconnected from each other, the second terminal is connected to a positive output terminal of a DC power supply to receive a predetermined voltage provided by the DC power supply, the third terminal is connected to the positive terminal of a multimeter and the fourth terminal is connected to the negative terminal of the multimeter, thus the voltage and the current of the power conversion circuit is tested by the multimeter.

7. A circuit board comprising:

a plurality of power conversion circuit, each of the power conversion circuit being to convert a voltage from one voltage to another, each of the power conversion circuit comprising:

an input port;

an output port, the input port of the power conversion circuit being an output port of one power conversion circuit previous in sequence to the power conversion circuit, the output port of the power conversion circuit being an input port of one power conversion circuit next in sequence to the power conversion circuit;

a main body circuit;

a first solder bridge arranged between the input port of the power conversion circuit and the main body circuit of the power conversion circuit; and

a second solder bridge arranged between the output port of the power conversion circuit and the main body circuit of the power conversion circuit.

8. The circuit board as described in claim 7 , wherein the first solder bridge comprises a first terminal and the second terminal spaced from the first terminal, the second solder bridge comprises a third terminal and a fourth terminal spaced from the third terminal, the first terminal is electrically connected to the input port, the second terminal is electrically connected to the main body circuit, the third terminal is electrically connected to the output port, and the fourth terminal is electrically connected to the main body circuit.

9. The circuit board as described in claim 7 , wherein when the first solder bridge and the second solder bridge are open, the connection between the input port and the main body circuit and the connection between the output port and the main body circuit are cut off.

10. The circuit board as described in claim 7 , wherein when the first solder bridge and the second solder bridge are closed, the input port, the main body circuit, and the output port are electrically connected to each other.

11. The circuit board as described in claim 7 , wherein the first solder bridge and the second solder bridge are fixed to the circuit board.

12. The circuit board as described in claim 7 , wherein when the first solder bridge and the second solder bridge are open, the input port is connected to a DC power supply to receive a predetermined voltage provided by the DC power supply, and the voltage and the current of the power conversion circuit are tested by a multimeter.

13. The circuit board as described in claim 8 , wherein when the first terminal and the second terminal are disconnected from each other, and the third terminal and the fourth terminal are disconnected from each other, the second terminal is connected to the positive output terminal of a DC power supply to receive a predetermined voltage from the DC power supply, the third terminal is connected to the positive terminal of a multimeter and the fourth terminal is connected to the negative terminal of the multimeter, thus the voltage and the current of the power conversion circuit is tested by the multi-meter.