| 摘要 |
<p>A power source control circuit, a power supply device, and a control method for the same are provided to output direct current voltages by setting a second direct current voltage having a potential relationship with a setting level of a first direct current voltage. A power supply device includes a controller(20), first to third DC/DC converters(30,40,50). The controller includes an interface controller(21), fourth resistors(REG0 to REG3), an adder(22), and a register(REG2). The interface controller(21) is connected with a bus(B1). The bus(B1) is connected with an external device. The interface controller(21) is connected to the four resistors(REG0 to REG3). The first register(REG0) is connected to the first DC/DC converter(30) and the third DC/DC converter(50). The first DC/DC converter(30) includes a main switching transistor(FET1), a sync side switching transistor(FET2), a chalk coil, and a capacitor. The main switching transistor(FET1) is connected at a drain to an input terminal, so that a direct current input voltage is applied to the main switching transistor(FET1) through the input terminal.</p> |
