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US 2008/0303486 A1Published application
Apparatuses and methods for detecting power source
AssigneeO2Micro, Inc.
InventorsHan-Jung Kao, Guoxing Li, Ya-Tung Kao, Wei Zhang
Life of this patent
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Abstract
A charger includes a detection pin, a voltage divider, and a comparator. The detection pin can couple the charger to a power source via a first data line. The voltage divider and the comparator are coupled to the detection pin. The voltage divider divides a power voltage provided by the power source and provides a detection voltage at the detection pin. The comparator compares the detection voltage with a predetermined reference voltage and identifies a type of the power source according to the comparing.
Claims23
A charger comprising:
- a detection pin operable for coupling said charger to a power source via a first data line;
- a voltage divider coupled to said detection pin and operable for providing a detection voltage at said detection pin by dividing a power voltage provided by said power source;
- and
- a first comparator coupled to said detection pin and operable for identifying a type of said power source by comparing said detection voltage with a first predetermined reference voltage.
1 more element
A method for detecting a power source, comprising:
- coupling a power source to a detection pin of a charger via a first data line;
- dividing a power voltage received from said power source to a detection voltage at said detection pin;
- comparing said detection voltage with a first predetermined reference voltage;
- and
- identifying a type of said power source according to a result of said comparing with said first predetermined reference voltage.
2 more elements
A system comprising:
- a power source for providing a power voltage;
- a USB client for receiving said power voltage and for exchanging data with said power source;
- and
- a charger coupled to said power source and said USB client via a first data line and operable for identifying a type of said power source by monitoring a detection voltage on said first data line and comparing said detection voltage with a first predetermined reference voltage and for identifying a type of said USB client by monitoring said detection voltage on said first data line and comparing said detection voltage with a second predetermined reference voltage.
1 more element
Dependencies are inferred from the claim text.