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Universal serial bus (USB) charger circuit

A charger and circuit technology, applied in the field of circuits, can solve the problems of high failure rate and easy damage, and achieve the effect of practical function and simple structure

Inactive Publication Date: 2013-05-08
苏州工业园区华锐装饰工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

MP3 and MP4 chargers used as daily necessities have the characteristics of high failure rate and easy damage because they are directly connected to 220V high voltage

Method used

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  • Universal serial bus (USB) charger circuit

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Embodiment Construction

[0013] The present invention will be specifically described below in conjunction with the accompanying drawings and specific embodiments.

[0014] combine figure 1 As shown, a USB charger circuit of the present invention includes a transformer T, two transistors Q1-Q2, four capacitors C1-C4, six diodes D1-D6 and seven resistors R1-R7,

[0015] One end of the power input end is connected in series with the resistor R7 and then connected to the emitter of the transistor Q1, and the other end of the power input end is connected in series with the diode D6 and the resistor R6, and then connected to the collector of the transistor Q1 and the base of the transistor Q2, and the base of the transistor Q1 A diode D5 is connected in series between the collector of the transistor Q2, a resistor R4 is connected in series between the base of the transistor Q1 and the emitter of the transistor Q2, a resistor R5 is connected in series between the emitter of the transistor Q1 and the emitter ...

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Abstract

The invention relates to a universal serial bus (USB) charger circuit comprising a transformer, two audions, four capacitors, six diodes and seven resistors, wherein after being in serial connection with the seventh resistor, an input end of a power supply is connected with an emitting electrode of the first audion; after being in serial connection with the sixth diode and the sixth resistor, the other end of the input end of the power supply is connected with a collector electrode of the first audion and a base electrode of the second audion; a base electrode and the collector electrode of the first audion are in parallel connection with a first voltage input portion of the transformer; the base electrode and a collector electrode of the second audion are in parallel connection with a second voltage input portion of the transformer; a voltage output portion of the transformer is in parallel connection with a serial connection circuit of the first diode and the first resistor; and two ends of the voltage output portion are connected to output end ports. The charging circuit is used for the USB charger circuit, and is simple in structure, practical in function and suitable for popularization in a market.

Description

technical field [0001] The invention relates to the field of circuits, in particular to a USB charger circuit. Background technique [0002] USB charger kit, also known as MP3 / MP4 charger, input AC160-240V, 50 / 60Hz, rated output: DC5V250mA. MP3 and MP4 chargers used as daily necessities are directly connected to 220V high voltage, so they have the characteristics of high failure rate and easy damage. Contents of the invention [0003] In order to overcome the deficiencies of the above technologies, the present invention provides a USB charger circuit with low failure rate. [0004] The present invention is achieved through the following technical solutions: [0005] A USB charger circuit, including a transformer, two triodes, four capacitors, six diodes and seven resistors, [0006] One end of the power input end is connected in series with the seventh resistor and then connected to the emitter of the first triode, and the other end of the power input end is connected i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00
Inventor 张海虹
Owner 苏州工业园区华锐装饰工程有限公司
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