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USB (universal serial bus) charging circuit

A charging circuit, USB interface technology, applied in battery circuit devices, circuit devices, current collectors, etc., can solve the problem of not supporting USB interface charging

Inactive Publication Date: 2012-12-05
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Many electronic consumer products that support USB interface charging, such as mobile phones, MP3 and digital cameras, can be charged through the computer's USB interface. However, most computers do not support USB interface charging when they are in the S5 state

Method used

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  • USB (universal serial bus) charging circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] Please refer to figure 1 , the USB charging circuit 100 of the present invention is applied to a computer (not shown in the figure), and a preferred embodiment of the USB charging circuit 100 includes a switch SW, a resistor R1, a USB interface 90 and a power selection module 80 .

[0013] The switch SW includes a first terminal and a second terminal, the first terminal of the switch SW is connected to a standby power supply 5V_STBY through a resistor R1, and the second terminal of the switch SW is grounded.

[0014] The USB interface 90 includes a power terminal. The power selection module 80 includes first to fourth ends, the first end of the power selection module 80 is connected to the first end of the switch SW, the second end, the third end and the fourth end of the power selection module 80 are respectively connected to A pair of 5-volt power supplies 5V_DUAL, a standby power supply 5V_SB and the power supply end of the USB interface 90; when the switch SW is in...

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PUM

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Abstract

A USB (universal serial bus) charging circuit comprises a switch, a first standby power source, a first power source, a second standby power source, a USB interface and a power selection module comprising a first end, a second end, a third end and a fourth end. A first end of the switch is connected with the first standby power source through a first resistor, a second end of the switch is grounded, the first end of the power selection module is connected with the first end of the switch, and the second end, the third end and the fourth end of the power selection module are connected with the first power source, the second standby power source and the USB interface respectively. The USB charging circuit enables the USB interface to be capable of supplying charging voltage at arbitrary operating states of a computer.

Description

technical field [0001] The invention relates to a USB charging circuit. Background technique [0002] Many electronic consumer products that support USB interface charging, such as mobile phones, MP3 and digital cameras, etc., can be charged through the USB interface of the computer. However, most computers do not support USB interface charging when they are in the S5 state. Contents of the invention [0003] In view of the above, it is necessary to provide a USB charging circuit that can provide a charging voltage in any working state of the computer. [0004] A USB charging circuit, comprising: [0005] A switch, including a first terminal and a second terminal, the first terminal of the switch is connected to a first standby power supply through a first resistor, and the second terminal of the switch is grounded; [0006] A USB interface, including a power terminal; and a power selection module, including first to fourth terminals, the first end of the power selection...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00
CPCH02J7/00H02J7/0072H02J7/0052H02J2007/0062H02J7/007182
Inventor 涂一新周海清熊金良
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD