Abstract: A device for controlling a charging voltage, includes: a voltage drop unit configured to drop a voltage by a preset magnitude; a voltage comparison unit configured to compare a charging voltage of a battery with a first reference voltage and to output a path selection signal through an output terminal; a first path configured to connect the battery to a charging power supply; a second path configured to connect the battery to the charging power supply, with the voltage drop unit being interposed between the battery and the charging power supply; and a path selector configured to select one from the first path and the second path according to the path selection signal.

Abstract: A device for controlling a charging voltage, includes: a voltage drop unit configured to drop a voltage by a preset magnitude; a voltage comparison unit configured to compare a charging voltage of a battery with a first reference voltage and to output a path selection signal through an output terminal; a first path configured to connect the battery to a charging power supply; a second path configured to connect the battery to the charging power supply, with the voltage drop unit being interposed between the battery and the charging power supply; and a path selector configured to select one from the first path and the second path according to the path selection signal.

Abstract: A fly back transformer comprises a horizontal output section; a low-voltage bobbin forming a first coil; a high-voltage bobbin forming a second coil having high-voltage coil layers and high-voltage rectifier diodes connected in series between upper terminal pins and lower terminal pins; a focusing pack having a PCB being printed with an adjustable resistor, and a focus input terminal; a bleeder resistor detachably fixed in position to the high-voltage bobbin and electrically connected with a high-voltage terminal of the high-voltage bobbin and the focus input terminal; and a focus-drawing wire disposed between the first and the last of the high-voltage coil layers, and having one end connected to draw a voltage generated between the high-voltage terminal and a low-voltage terminal of the high-voltage bobbin and the other end connected with the focus input terminal.

Abstract: A fly back transformer comprises a horizontal output section; a low-voltage bobbin forming a first coil; a high-voltage bobbin forming a second coil having high-voltage coil layers and high-voltage rectifier diodes connected in series between upper terminal pins and lower terminal pins; a focusing pack having a PCB being printed with an adjustable resistor, and a focus input terminal; a bleeder resistor detachably fixed in position to the high-voltage bobbin and electrically connected with a high-voltage terminal of the high-voltage bobbin and the focus input terminal; and a focus-drawing wire disposed between the first and the last of the high-voltage coil layers, and having one end connected to draw a voltage generated between the high-voltage terminal and a low-voltage terminal of the high-voltage bobbin and the other end connected with the focus input terminal.