Unlock instant, AI-driven research and patent intelligence for your innovation.

Power supply control circuit, electronic apparatus and charging method thereof

A technology for power control circuits and electronic instruments, applied in battery circuit devices, secondary battery charging/discharging, instruments, etc.

Inactive Publication Date: 2009-01-28
SEIKO EPSON CORP
View PDF4 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is impossible to set the same electronic instrument as the charging source or charging object

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Power supply control circuit, electronic apparatus and charging method thereof
  • Power supply control circuit, electronic apparatus and charging method thereof
  • Power supply control circuit, electronic apparatus and charging method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0054] Embodiments of the present invention will be described in detail below using drawings.

[0055] The embodiments described below are not limited to the content of the present invention described in the scope of the claims, and all the configurations described in the embodiments are not limited to elements essential to the configuration of the present invention.

[0056] One embodiment of the present invention relates to a power supply control circuit for an electronic instrument with a USB interface, wherein, when the electronic instrument is set at the slave side of USB data transmission and is in a normal operation mode, the power control circuit controls the power supply of the USB power line, A power supply from a rechargeable battery, or an external power supply to a data transfer control circuit for controlling USB data transfer; To charge the battery, the power control circuit supplies power from the USB power cord to the rechargeable battery of the electronic ins...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

When an electronic instrument Q is in normal operating mode and set to be slave, power from a rechargeable battery or an external power source is supplied to a data transfer control circuit, and when the electronic instrument Q is in charge mode and set to be slave, power from VBUS is supplied thereto to charge a rechargeable battery. When an external power source can be used in charge mode, power from the external power source is supplied to the rechargeable battery instead of from VBUS. When an electronic instrument P is in normal operating mode and set to be master, power from a rechargeable battery or an external power source is supplied to the data transfer control circuit and the electronic instrument Q; and when the electronic instrument P is in charge mode and set to be master, power from the rechargeable battery or the external power source is supplied to the electronic instrument Q through the VBUS in order to charge a rechargeable battery of the electronic instrument Q. In charge mode, the supply of power to the data transfer control circuit is either turned off or an energy-saving mode is set.

Description

technical field [0001] The invention relates to a power supply control circuit, an electronic instrument, and a charging method thereof. technical background [0002] In portable electronic devices such as mobile phones, it is very common to use battery power. To charge its rechargeable battery (rechargeable battery, or secondary battery), a dedicated AC adapter or charger must be used. Moreover, such AC adapters or chargers cannot be applied to other types of portable electronic devices (products of other companies or products produced by themselves) in many cases. Therefore, when going out with a variety of portable electronic instruments, it is necessary to carry a plurality of AC adapters or chargers, which is very inconvenient for the user. [0003] On the other hand, in recent years, the Universal Serial Bus (USB) as an interface standard for connecting a personal computer (hereinafter referred to as PC) to its external devices has been rapidly introduced to the mark...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04M1/00H04B7/26G06F1/26G06F1/32G06F3/00H01M10/44H02J7/00
CPCY02E60/12G06F1/3237Y02B60/1221H02J7/0054G06F1/263H02J2007/006G06F1/3203H02J7/0055G06F1/324Y02B60/1292G06F1/266Y02B60/1217H02J2207/30H02J2207/40H02J7/342Y02D10/00
Inventor 松田邦昭大下俊
Owner SEIKO EPSON CORP