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Charger detection method and circuit

A detection method and detection circuit technology, which are applied in battery circuit devices, data exchange chargers, current collectors, etc., can solve problems such as increasing the charging time of electronic devices and detecting errors in the detection process.

Active Publication Date: 2016-08-10
FAIRCHILD SEMICON SUZHOU +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, many manufacturers retain some proprietary charging mechanisms that may be misdetected by the BC1.2 compliance scheme detection process
In many instances, misidentifying the type of charging mechanism translates to the charger being utilized at a reduced operating current, thereby increasing the charging time of the electronic device

Method used

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  • Charger detection method and circuit
  • Charger detection method and circuit
  • Charger detection method and circuit

Examples

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Embodiment Construction

[0015] The present inventors have recognized systems and methods (among others) for detecting proprietary chargers (i.e., portable electronic devices such as cell phones, palmtops, mobile media players, tablet tablets, portable navigation devices, etc., specific chargers) or PS / 2 ports, while still being compatible with the BC1.2 compliance scheme. In some examples, the systems and methods can differentiate between different voltage levels or resistance values ​​on the charging pins to detect the type of charger or make a switch between the SDP device (or dedicated charger) and the PS / 2 port. distinction, while still being compatible with the BC1.2 compatibility scheme.

[0016] figure 1 An example of a system 100 including an electronic device 105 and a charger 110 is generally shown. In an example, the electronic device 105 may include a socket 115 configured to connect the charger 110 to the electronic device 105 with a cable 117 and a plug 116 . In some examples, elect...

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Abstract

This application relates to a charger detection method and circuit. In an example, a method of classifying possible chargers connected to a port of an electronic device may include: detecting a possible charger connected to a USB compliant port of the electronic device; applying a pull-down current to the USB compliant port to provide a first test voltage on each of the first and second data lines; and if a pull-down voltage is used, each of the first and second data lines If the first test voltage on is not between the first threshold and the second threshold, execute the first detection process of the USB battery charging 1.2 compatible scheme.

Description

technical field [0001] Apparatus and methods are provided for detecting devices connected to ports, in particular apparatus and methods for detecting and classifying chargers connected to ports. Background technique [0002] Broadly speaking, there is a recent trend towards standardization of external ports on electronic devices, such as data ports or charging ports. In many electronic devices, such as mobile electronic devices, a single port (eg, Universal Serial Bus USB) can be configured as a data port, a charging port, or a data and charging port. Also there are many different types of charging ports (eg with different power capacities). The battery charging standard "USB Battery Charging 1.2 Compliant Scheme (Revision 1.0)" (herein referred to as "BC1.2 Compliant Scheme") defines several types of charging ports, including Dedicated Charging Port (DCP), Charging Downstream Port (CDP) and Standard Downstream Port (SDP). [0003] However, many manufacturers retain some ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/00G01R31/00
CPCH02J7/00H02J7/00034H02J7/00045
Inventor N·加涅奥斯卡·弗雷塔斯C·克莱恩T·戴格尔D·理查德森
Owner FAIRCHILD SEMICON SUZHOU