Power source control circuit, power supply device, and control method for the same
View Patent ↗A control circuit for a power supply device, a power supply device, and the like are provided in which the power supply device has a plurality of DC/DC converters provided for generating voltage while the mutual relationship of potential between the voltage outputs is maintained. The control circuit 20 in the power supply device 10 which outputs different direct current voltages (VCC, VBGP, and VBGN) includes a voltage setting unit 22 for determining the setting level of a second direct current voltage VBGP which has a potential relationship with the setting level of the first direct current voltage VCC which is one of a plurality of the different direct current voltages.
1. A control circuit for a power supply device which outputs a plurality of direct current voltages different in a voltage level, comprising:
a voltage setting unit to determine a setting level of a second direct current voltage so as to maintain a specified difference in potential between a voltage level of the second direct current voltage and a voltage level of a first direct current voltage which is one of the plurality of the direct current voltages,
wherein the voltage setting unit includes an adder to add a setting level of the first direct current voltage with a difference between the setting level of the first direct current voltage and the setting level of the second direct current voltage.
2. The control circuit for a power supply device according to claim 1 , comprising:
a first direct current voltage data storage to store data of the setting level of the first direct current voltage; and
a voltage difference data storage to store data of the difference between the setting levels.
3. The control circuit for a power supply device according to claim 1 , comprising:
a sum direct current voltage data storage to store data of the setting level of the second direct current voltage determined by the adder of the voltage setting unit.
4. The control circuit for a power supply device according to claim 1 , wherein
a plurality of the voltage setting units are provided and connected so that the setting level of the second direct current voltage determined by one of the plurality of the voltage setting units is delivered as the setting level of the first direct current voltage in another voltage setting unit which is different from the one of the plurality of the voltage setting units.
5. A power supply device for outputting a plurality of direct current voltages which are different in the voltage level, comprising:
a voltage setting unit to determine a setting level of a second direct current voltage so as to maintain a specified difference in potential between a voltage level of the second direct current voltage and a voltage level of a first direct current voltage which is one of the plurality of the direct current voltages,
wherein the voltage setting unit includes an adder to add a setting level of the first direct current voltage with a difference between the setting level of the first direct current voltage and the setting level of the second direct current voltage.
6. The power supply device according to claim 5 , comprising:
a first direct current voltage data storage to store data of the setting level of the first direct current voltage; and
a voltage difference data storage to store data of the difference between the setting levels.
7. The control circuit for a power supply device according to claim 5 , further comprising:
a sum direct current voltage data storage to store data of the setting level of the second direct current voltage determined by the adder of the voltage setting unit.
8. The power supply device according to claim 5 , wherein
a plurality of the voltage setting units are provided and connected so that the setting level of the second direct current voltage determined by one of the plurality of the voltage setting units is delivered as the setting level of the first direct current voltage in another voltage setting unit which is different from the one of the plurality of the voltage setting units.
9. A control method of a power supply device which outputs a plurality of direct current voltages which are different in the voltage level, comprising:
determining a setting level of a second direct current voltage so as to maintain a specified difference in potential between a voltage level of the second direct current voltage and a voltage level of a first direct current voltage which is one of the plurality of the direct current voltages,
wherein the determining includes adding a setting level of the first direct current voltage with a difference between the setting level of the first direct current voltage and the setting level of the second direct current voltage.
10. The control method of a power supply device according to claim 9 , comprising:
when a plurality of setting levels of the second direct current voltage are set, setting one of the plurality of the setting levels of the second direct current voltage as the setting level of the first direct current voltage having a potential relation to setting level of the another one of the second direct current voltages.