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A charging detection circuit of appliance device and charging detection method

A technology for charging detection and electrical equipment, which is applied in the field of charging detection control circuits, can solve problems such as the inability to accurately judge power sources, and achieve the effects of shortening charging time and accurate detection

Inactive Publication Date: 2008-01-09
QINGDAO HISENSE MOBILE COMM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

As far as the current market situation is concerned, the output voltage of a general USB power supply and a common charger is about 5.2V, and it is impossible to accurately determine which power supply it is from the voltage value. Therefore, a new design scheme is required to complete the judgment. To meet the fast and safe charging requirements of handheld communication devices

Method used

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  • A charging detection circuit of appliance device and charging detection method
  • A charging detection circuit of appliance device and charging detection method

Examples

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Embodiment 1

[0024] Embodiment 1. This embodiment takes a hand-held mobile communication device—a mobile phone as an example to elaborate on the design concept of the present invention. The data transmission interface is implemented by selecting the common USB data transmission interface on the current mobile phone. Of course, it can also use Other types of data transmission interfaces including at least two data signal terminals are implemented, and the present invention is not limited thereto. The USB data transmission interface may be a current conventional USB interface, or may be realized by using a 5-pin interface XP1 as shown in FIG. 1 or other types of interfaces used to transmit USB data on electrical equipment.

[0025] As shown in Figure 1, pin 1 of the interface XP1 is a power terminal. On the one hand, it is connected to the power circuit inside the mobile phone for DC charging. Specifically, it is connected to the power input terminal Vin of the power management chip N2 in the...

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Abstract

The invention is concerned with the charging detection circuit of the electric machine and the testing method. It is with the data transmission interface that its terminals for power supplies connects the power circuit of the inner of the electric machine where the data signal terminal connects the data transmission loop; the data transmission interface include at least two data signal terminal with the data signal line of each, one meets the voltage upward branch and the other one meets the input interface of the processor; the processor generates the charging detection signal according to the data transmission interface and send it to the power supply to limit the size of the input current with the data transmission interface.

Description

technical field [0001] The invention belongs to the technical field of charging detection, and in particular relates to a charging detection control circuit and a detection method that utilizes an existing data transmission interface on a device to be multiplexed as a common charger interface and detects a charging type. Background technique [0002] While the functions of handheld communication devices are becoming more and more perfect, miniaturization is also a consistent development trend. More and more mobile phones have a USB data transmission function, and the USB power supply of the PC can be used instead of the charger to charge the mobile phone through the USB interface. From the perspective of saving PCB board space and cost, many handheld communication devices use the interface used to transmit USB data as a common charger interface, thus realizing the connection between the charger and the handheld communication device without adding an additional charging inter...

Claims

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Application Information

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IPC IPC(8): H04B1/38G01R31/00
Inventor 毛永新张斌李秀勇杜洋
Owner QINGDAO HISENSE MOBILE COMM TECH CO LTD
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