Dedicated power supply apparatus, terminal, power supply system, and power supply method

Abstract

A dedicated power supply apparatus includes a regulator that receives power from an external power source, two signal lines to which the regulator is connected, and two resistors, each placed between the regulator and an associated one of the two signal lines.

1 - 9 . (canceled) 
     
     
         10 . A electronic device comprising:
 a rechargeable battery;   a connector, the connector comprising:
 a power supply pin for supplying power from an external device and for detecting whether the connector is connected to the external device; 
 a ground pin; and 
 two signal pins for transmitting data between the electronic device and the external device; 
   a controller for controlling charging of the rechargeable battery, the controller being configured to judge whether the external device is a predetermined power supply apparatus based on a state of the two signal pins when the external device is connected to the electronic device via the connector; and control communication with the external device via the connector so that the rechargeable battery is charged by a first current from the external device;   a storage unit; and   a playback unit capable of playing back content data stored in the storage unit by using power of the rechargeable battery,   wherein the controller controls communication with the external device via the connector so that the rechargeable battery is charged by a second current from the external device when the external device is the predetermined power supply apparatus, the second current being greater than the first current.   
     
     
         11 . The electronic device according to claim  1 , wherein the controller determines that the external device is the predetermined power supply apparatus when the two signal pins are shorted with each other. 
     
     
         12 . The electronic device according to claim  1 , wherein the controller determines that the external device is the predetermined power supply apparatus when the two signal pins are floated. 
     
     
         13 . The electronic device according to claim  2 , further comprising a regulator coupled to the two signal pins. 
     
     
         14 . The electronic device according to claim  1 , wherein the controller determines that the external device is the predetermined power supply apparatus when logical statuses of the two signal pins are high. 
     
     
         15 . The electronic device according to claim  1 , wherein the connector includes only the power supply pin, the ground pin, and the two signal pins. 
     
     
         16 . The electronic device according to claim  1 , wherein the rechargeable battery comprises a Lithium ion battery. 
     
     
         17 . The electronic device according to claim  1 , wherein the first current is 100 mA and the second current is 500 mA. 
     
     
         18 . The electronic device according to claim  1 , wherein the content data comprises a MP3 file. 
     
     
         19 . The electronic device according to claim  1 , wherein the connector complies with a USB 2.0 Standard. 
     
     
         20 . The electronic device according to claim  1 , wherein the predetermined power supply apparatus is a dedicated charging apparatus. 
     
     
         21 . The electronic device according to claim  1 , wherein the electronic device goes into suspension when the electronic device is connected to the external device and when an idle state is detected via the connector connected to the external device for a predetermined time.