Power supply having power saving mode
View Patent ↗A removably connected power supply for supplying external power to an electronic product. An output unit supplies power to the electronic product. A switching unit selects whether to supply the power to the output unit, and a switching apparatus turns on the switching unit in response to being connected with the electronic product and turns off the switching unit in response to being disconnected from the electronic product. The switching apparatus includes a switch which performs a switching operation in response to the connection or disconnection with the electronic product from the output unit. A switching element controls operation of the switching unit in response to the operation of the switch. Thus, the power supply is operated in a power saving mode and unnecessary power consumption and damage caused by voltage or current spikes are prevented.
1. A removably connectable power supply for supplying power to an electronic product, comprising:
an output unit which supplies the power to the electronic product and includes a photo coupler;
a switching unit which selects whether to supply the power to the output unit; and
a switching apparatus which turns on the switching unit when the output unit is connected with the electronic product and turns off the switching unit when the output unit is disconnected from the electronic product, the switching apparatus including contacts separable from a ground terminal of the removably connectable power supply when the removably connectable power supply is connected to the electronic product to supply power to the output unit;
wherein the switching apparatus activates the photo coupler when the output unit is disconnected from the electronic product in order to interrupt power to the output unit.
2. The power supply of claim 1 , wherein the switching apparatus comprises:
a switch which performs a switching operation in response to connection or disconnection of the electronic product and the output unit, and
a switching element which controls the operation of the switching unit in response to the operation of the switch.
3. The power supply of claim 2 , wherein the switching element is a a photo transistor.
4. The power supply of claim 2 , wherein:
the switch is disposed at a power supply terminal of the output unit, and
upon the disconnection of the power supply and the output unit, the switching element is turned on and the operation of the switching unit is interrupted, thus interrupting the power to the output unit.
5. The power supply of claim 2 , wherein:
the switch is disposed at a power supply terminal of the output unit, and
upon the connection of the power supply and the output unit, the switching element is turned off and the switching unit is operated, thus the power is supplied to the output unit.
6. The power supply of claim 4 , wherein:
the switch is operable to be grounded with the ground terminal of the output unit in response to the output unit being disconnected from the electronic product.
7. The power supply of claim 5 , wherein the switch is operable to disconnect from the ground terminal of the output unit in response to the output unit being connected with the electronic product.
8. A removably connectable power supply for supplying power to an electronic product, comprising:
an output unit which supplies the power to the electronic product;
a switching unit which selects whether to supply the power to the output unit; and
a switching apparatus which turns on the switching unit when the output unit is connected with the electronic product and turns off the switching unit when the output unit is disconnected from the electronic product;
wherein the output unit emits light in response to disconnecting the removably connectable power supply from the electronic product to interrupt power to the output unit.