Power supply device
First Claim
1. A power supply device comprising:
- an output voltage setting portion that generates an output voltage setting signal for providing a set value of an output voltage; and
an output voltage control portion that controls to maintain a voltage value of said output voltage at said set value,wherein said output voltage setting portion comprises;
a set value changeover portion that has a plurality of set value changeover switches and turns on/off said set value changeover switches to change the set value of said output voltage;
a storage device that stores information indicating an ON/OFF state appropriate for each set value changeover switch for keeping the voltage value of said output voltage within a specified range; and
a set value changeover switch control portion that controls said set value changeover switches so as to bring each set value changeover switch into a state as indicated by the information stored in said storage device when said output voltage is supplied to the load.
1 Assignment
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Accused Products
Abstract
A power supply device comprises: a voltage converting portion that converts a voltage generated from a power supply portion into an output voltage to be supplied to a load; a voltage divider circuit that generates an output voltage setting signal for providing a set value of the output voltage; a set value changeover portion that turns on/off set value changeover switches to change a voltage divider ratio of the voltage divider circuit to change the set value; a storage device that stores a state appropriate for each set value changeover switch for keeping the value of the output voltage within a specified range; a set value changeover switch control portion that controls the set value changeover switches so as to bring each set value changeover switch into a state as stored in the storage device when the voltage is supplied from the voltage converting portion to the load; and an output voltage control portion that controls the voltage converting portion so as to make zero a deviation between the value of the output voltage and the set value.
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Citations
8 Claims
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1. A power supply device comprising:
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an output voltage setting portion that generates an output voltage setting signal for providing a set value of an output voltage; and an output voltage control portion that controls to maintain a voltage value of said output voltage at said set value, wherein said output voltage setting portion comprises; a set value changeover portion that has a plurality of set value changeover switches and turns on/off said set value changeover switches to change the set value of said output voltage; a storage device that stores information indicating an ON/OFF state appropriate for each set value changeover switch for keeping the voltage value of said output voltage within a specified range; and a set value changeover switch control portion that controls said set value changeover switches so as to bring each set value changeover switch into a state as indicated by the information stored in said storage device when said output voltage is supplied to the load. - View Dependent Claims (2, 3, 7)
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4. A power supply device comprising:
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a voltage converting portion that converts an input voltage supplied from a power supply portion into an output voltage to be supplied to a load; an output voltage setting portion comprising a voltage divider circuit that has an upper resistance and a lower resistance connected in series, and divides a constant DC voltage obtained from a constant-voltage power supply circuit to generate an output voltage setting signal for providing a set value of a voltage value of said output voltage; and an output voltage control portion that controls said voltage converting portion so as to maintain the voltage value of said output voltage at said set value, wherein said output voltage setting portion comprises; a set value changeover portion that has a plurality of set value changeover switches and turns on/off said plurality of set value changeover switches to change a voltage divider ratio of said voltage divider circuit to a different value to change said set value; a storage device that stores information indicating an ON/OFF state appropriate for each set value changeover switch for keeping the voltage value of said output voltage within a specified range; and a set value changeover switch control portion that controls said set value changeover switches so as to bring each set value changeover switch into a state as indicated by the information stored in said storage device when the voltage is supplied from said voltage converting portion to the load. - View Dependent Claims (5, 6, 8)
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Specification