Interface device
Disclosed is an interface device capable of simultaneously connecting an audio device and charger to an electronic device. An interface device may enable an electronic device with a single USB type-C connector but no analog audio jack to connect to both an audio device and a charger through the USB type-C connector. The interface device may provide automated quick charging when connected with the charger but not with the audio device.
1. An interface device, comprising:
a first plug of a first universal serial bus (USB) type;
a first receptacle of the first USB type;
an analog audio jack; and
a connection circuit configured to connect the first plug to at least one of the first receptacle and the analog audio jack, to supply a first power level at a first charging current from a power supply to an electronic device when the power supply is connected to the first receptacle while a plug of an audio device is connected to the analog audio jack and the first plug is connected with the electronic device, and to supply a second power level at a second charging current from the power supply to the electronic device when the power supply is connected to the first receptacle while no plug is connected to the analog audio jack and the first plug is connected with the electronic device,
wherein the first power level is less than the second power level and the first charging current is less than the second charging current wherein the first USB type is a USB type-C, and wherein the first plug of the USB type-C includes a first CC pin and a first VCONN pin, the first receptacle of the USB type-C includes a second CC pin and a second VCONN pin, and wherein the second charging current is for quick charging, wherein the analog audio jack includes a DET 1 terminal, and wherein the connection circuit includes at least one or more switches for connecting the first CC pin and the first VCONN pin to the DET 1 terminal, connecting any one of the second CC pin and the second VCONN pin to a pull-down resistor while connecting the first CC pin and the first VCONN pin to the DET 1 terminal, or connecting the first VCONN pin to the second VCONN pin, wherein the at least one or more switches include a first switch connected between a CC 1 line connected with the first CC pin of the first plug and the DET 1 terminal of the analog audio jack to switch on or off, a second switch connected between a CC 2 line connected with the first VCONN pin of the first plug and the DET 1 terminal of the analog audio jack to switch on or off, a third switch connected between the CC 2 line connected with the first VCONN pin of the first plug and the CC 2 line connected with the second VCONN pin or between the CC 1 line connected with the first CC pin of the first plug and the CC 1 line connected with the second CC pin of the first receptacle to switch on or off, and a fourth switch connected between the CC 2 line connected with the second VCONN pin of the first receptacle and the pull-down resistor or between the CC 1 line connected with the second CC pin of the first receptacle and the pull-down resistor to switch on or off.
2. The interface device of claim 1 , wherein when the first plug is connected to a first electronic device, the first receptacle is in a non-connected state, and the audio device is connected to the analog audio jack, the third switch and the fourth switch are switched off, and the first switch and the second switch are switched on to electrically connect the first electronic device to the analog audio jack.
3. The interface device of claim 1 , wherein when the first plug is connected to a first electronic device, a charger is connected to the first receptacle, and the audio device is connected to the analog audio jack, the third switch and the fourth switch are switched off, and the first switch and the second switch are switched on to electrically connect the first electronic device to the analog audio jack and to electrically connect the first electronic device to the charger.
4. The interface device of claim 1 , wherein when the first plug is connected to a first electronic device, a charger is connected to the first receptacle, and the analog audio jack is in a non-connected state, the third switch is switched on, and the first switch, the second switch, and the fourth switch are switched off to electrically connect the first electronic device to the charger.
5. The interface device of claim 1 , further comprising:
a first housing including the first plug of the first USB type;
a second housing including the first receptacle of the first USB type and the analog audio jack; and
a cable connecting the first housing with the second housing.
6. The interface device of claim 1 , further comprising:
a second plug of the first USB type connected with the first receptacle; and
a power plug connected with the second plug configured to, when connected to an external power source, deliver power from the external power source to the second plug.
7. The interface device of claim 1 , further comprising:
a second plug of the first USB type connected with the first receptacle; and
a battery pack connected with the second plug configured to provide power to the second plug.