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A power supply

A technology of power supply and telephone, applied in the field of power supply, can solve the problems of high current and impractical realization of LED flash driver

Inactive Publication Date: 2008-02-06
CAP XX LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This results in LED flash drivers having to support very high currents and making implementations impractical in small portable applications such as cell phones

Method used

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Examples

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Embodiment Construction

[0186] Referring to Figures 1 and 2, respective power supplies 1 and 20 are provided, each for powering a load in the form of a flash drive circuit 4 for a digital camera (not shown). Each power supply comprises supercapacitive means in the form of supercapacitors 8 for powering the circuit 4 . A regulator unit in the form of an inductive regulator 10 charges the supercapacitor 8 .

[0187] Each power supply comprises an input 5 for connection to a power source in the form of a lithium-ion battery 6 . Alternative power sources are used in other embodiments, including but not limited to alternative battery types.

[0188] In the embodiment of FIG. 1 , the regulator 10 is connected in series with the battery 6 and together they are connected in parallel with the ultracapacitor 8 , whereas in the embodiment of FIG. 2 the ultracapacitor 8 is connected in series with the battery 6 .

[0189] The regulator unit limits the charging current of the supercapacitor to a predetermined v...

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PUM

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Abstract

A power supply (1) for powering a load, the load being in the form of a flash driver circuit (4) for a digital camera (not shown). The power supply includes a supercapacitive device, in the form of a supercapacitor (8), for powering circuit (4). A regulator unit, in the form of an inductive regulator (10), charges supercapacitor (8).

Description

technical field [0001] The present application relates to power supplies, in particular to power supplies for powering at least one load. [0002] The present invention was developed primarily for use with portable electronic devices such as cellular telephones having an onboard digital camera with a flash, and is described below with reference to this application. It will be appreciated that the present invention is not limited to this particular field of application, but is also applicable to other portable electronic devices such as PDAs, laptops, digital cameras, MP3 players, or other Other computing devices, whether portable or not, at more than one rated voltage with corresponding peak power requirements. The invention is also applicable to high-power devices such as hybrid electric vehicles and electric vehicles. Background technique [0003] Portable electronic devices include an on-board power source for powering electronic circuits contained within the device. T...

Claims

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Application Information

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IPC IPC(8): H05B37/02H02M9/04G03B15/05
Inventor T·史密斯P·马尔斯
Owner CAP XX LTD