Method for providing power to an electronic device
First Claim
Patent Images
1. A method for providing power through a USB port of an electronic device comprising:
- connecting a power supply having a variable power supply voltage to the USB port of the electronic device including at least one data line;
emulating a personal computer (PC) host system by selectively coupling one of a plurality of host ID standard circuits to the at least one data line such that the electronic device believes that the power supply is a legacy PC host system, wherein the plurality of host ID standard circuits include;
(a) four resistors arranged as two parallel dividers between the power supply voltage and ground;
(b) two resistors arranged as a single divider between the power supply voltage and ground; and
(c) a shorting switch;
retrieving at least one descriptor from the electronic device;
identifying the maximum voltage level to be provided to the electronic device from the at least one descriptor; and
setting the power supply voltage to the maximum voltage level.
1 Assignment
0 Petitions
Accused Products
Abstract
A method for providing power through a USB port of an electronic device includes connecting a power supply to a USB port of an electronic device, emulating a personal computer (PC) host system such that the electronic device believes that the power supply is a PC host system, retrieving at least one descriptor from the electronic device, identifying the electronic device from the at least one descriptor, and setting a charging voltage based upon the identity of the electronic device.
-
Citations
20 Claims
-
1. A method for providing power through a USB port of an electronic device comprising:
-
connecting a power supply having a variable power supply voltage to the USB port of the electronic device including at least one data line; emulating a personal computer (PC) host system by selectively coupling one of a plurality of host ID standard circuits to the at least one data line such that the electronic device believes that the power supply is a legacy PC host system, wherein the plurality of host ID standard circuits include;
(a) four resistors arranged as two parallel dividers between the power supply voltage and ground;
(b) two resistors arranged as a single divider between the power supply voltage and ground; and
(c) a shorting switch;retrieving at least one descriptor from the electronic device; identifying the maximum voltage level to be provided to the electronic device from the at least one descriptor; and setting the power supply voltage to the maximum voltage level. - View Dependent Claims (2, 3, 4, 5)
-
-
6. A method for providing power through a USB port of an electronic device comprising:
-
connecting a power supply including digital logic and having a variable power supply voltage to the USB port of the electronic device including at least one data line; emulating a personal computer (PC) host system using the digital logic to selectively couple one of a plurality of host ID standard circuits to the at least one data line such that the electronic device believes that the power supply is a PC host system, wherein the plurality of host ID standard circuits include;
(a) four resistors arranged as two parallel dividers between the power supply voltage and ground;
(b) two resistors arranged as a single divider between the power supply voltage and ground; and
(c) a shorting switch;retrieving at least one descriptor via the USB port from the electronic device via the at least one data line; identifying a maximum voltage level to be provided to the electronic device from the at least one descriptor; and setting a charging voltage of the power supply to the maximum voltage level. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13)
-
-
14. The method for providing power through a USB port of an electronic device comprising:
-
connecting a power supply including digital logic to the USB port of the electronic device, wherein the USB port includes a VBUS power line, a D−
data line and a D+ data line, and a GND ground line;emulating a personal computer (PC) host system using the digital logic to selectively couple one of a plurality of host ID standard circuits to the D−
data line and the D+ data line such that the electronic device believes that the power supply is a PC host system, wherein the plurality of host ID standard circuits include;
(a) four resistors arranged as two parallel dividers between the VBUS power line and the GND ground line;
(b) two resistors arranged as a single divider between the VBUS power line and the GND ground line; and
(c) a shorting switch;retrieving at least one descriptor via the USB port from the electronic device, wherein the descriptor includes one or more of a Vendor Identification Number (VID), a Product Identification Number (PID), and a code in a text descriptor field; identifying a maximum voltage level to be provided to the electronic device from the at least one descriptor; and setting a charging voltage of the power supply to the maximum voltage level. - View Dependent Claims (15, 16, 17, 18, 19, 20)
-
Specification