CN204481701U - Household electrical appliances power supply adaptor - Google Patents
Household electrical appliances power supply adaptor Download PDFInfo
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- CN204481701U CN204481701U CN201520173904.4U CN201520173904U CN204481701U CN 204481701 U CN204481701 U CN 204481701U CN 201520173904 U CN201520173904 U CN 201520173904U CN 204481701 U CN204481701 U CN 204481701U
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Abstract
The utility model relates to a kind of power supply adaptor, particularly a kind of household electrical appliances power supply adaptor, comprise power supply chip U1, ac power input end is connected with rectification unit input, described rectification unit output is connected with filter unit input, and described filter unit output is connected with No. 5 pins of power supply chip U1 with the series circuit of resistance R2 by resistance R1; Described filter unit output is connected with transformer T1 input by peak absorbing unit, described transformer T1 output is connected with EMC filter unit, described peak absorbing unit drains with metal-oxide-semiconductor Q1 and is connected, described metal-oxide-semiconductor Q1 grid is connected with No. 6 pins of power supply chip U1 by discharge cell, and described metal-oxide-semiconductor Q1 source electrode is connected with No. 4 pins of switching power source chip U1 by antibomb unit.After adopting said structure, output voltage can be made to keep stable by antibomb unit, protection household appliances avoid internal wiring high voltage short circuit.
Description
Technical field
The utility model relates to a kind of power supply adaptor, particularly a kind of household electrical appliances power supply adaptor.
Background technology
Power supply adaptor is the power supply conversion equipment of small portable electronic device and electronic apparatus, is generally made up of shell, power transformer and rectification circuit, can be divided into exchange output type and direct-current-output type by its output type; Direct Plug-In and Table top type can be divided into by connected mode.Extensively be matched in the equipment such as phone composite aircraft, game machine, language playback device, walkman, notebook computer, cell phone.
Household electrical appliances also need to use power supply adaptor in the course of the work, when household appliances are subject to abnormal operation, easily cause the situation of household appliances internal wiring high voltage short circuit.
Summary of the invention
The utility model technical issues that need to address are to provide a kind of household electrical appliances power supply adaptor.
For solving above-mentioned technical problem, household electrical appliances power supply adaptor of the present utility model comprises power supply chip U1, ac power input end is connected with rectification unit input, described rectification unit output is connected with filter unit input, and described filter unit output is connected with No. 5 pins of power supply chip U1 with the series circuit of resistance R2 by resistance R1; Described filter unit output is connected with transformer T1 input by peak absorbing unit, described transformer T1 output is connected with EMC filter unit, described peak absorbing unit drains with metal-oxide-semiconductor Q1 and is connected, described metal-oxide-semiconductor Q1 grid is connected with No. 6 pins of power supply chip U1 by discharge cell, and described metal-oxide-semiconductor Q1 source electrode is connected with No. 4 pins of switching power source chip U1 by antibomb unit.
Further, be connected with anti-lightning strike unit between described ac power input end and rectification unit, described anti-lightning strike unit comprises piezo-resistance VZ1 and fusible link F1; Described fusible link F1 one end is connected with ac power input end, and the other end is connected with rectification unit, and described piezo-resistance VZ1 is connected in parallel on rectification unit input.
Further, described filter unit is the parallel circuits of electric capacity C1 and electric capacity C2.
Further, described peak absorbing unit is the buffer be made up of resistance R6, electric capacity C7 and diode D1, the positive pole of described diode D1 is connected with the drain electrode of metal-oxide-semiconductor Q1, and the negative pole of described diode D1 is connected with filter unit output with the series circuit of electric capacity C7 by resistance R3.
Further, described discharge cell comprises resistance R10 and diode D3, the positive pole of described diode D3 is connected with the grid of metal-oxide-semiconductor Q1, and the negative pole of described diode D3 is connected with No. 5 pins of switching power source chip U1, described diode D3 two ends parallel resistance R10.
Further, described EMC filter unit is the π type filter circuit of electric capacity C9, electric capacity C12 and inductance L 2 composition.
Further, voltage jump limiting unit is connected with between described EMC filter unit and transformer T1 output, described voltage jump limiting unit comprises diode D9, resistance R20 and electric capacity C20, the output of described transformer T1 is connected with the positive pole of diode D9, the two ends of described diode D9 are parallel with the series circuit of resistance R20 and electric capacity C20, and the negative pole of described diode D9 is voltage jump limiting unit output.
Further, described antibomb unit is the parallel circuits of resistance R13, resistance R14, resistance R12 and voltage-stabiliser tube ZD1, the source electrode of described metal-oxide-semiconductor Q1 passes through the parallel circuits ground connection of resistance R13, resistance R14, resistance R12 and voltage-stabiliser tube ZD1, and the source electrode of described metal-oxide-semiconductor Q1 is connected with No. 4 pins of power supply chip U1 by resistance R9; The grid of described metal-oxide-semiconductor Q1 is by resistance R15 ground connection.
After adopting said structure, output voltage can be made to keep stable by antibomb unit, protection household appliances avoid internal wiring high voltage short circuit.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Fig. 1 is the circuit theory diagrams of the utility model household electrical appliances power supply adaptor.
In figure: 1 is anti-lightning strike unit, 2 is rectification unit, and 3 is filter unit, and 4 is peak absorbing unit, and 5 is voltage jump limiting unit, and 6 is EMC filter unit, and 7 is discharge cell, and 8 is antibomb unit
Embodiment
As shown in Figure 1, household electrical appliances power supply adaptor of the present utility model comprises power supply chip U1, ac power input end is connected with rectification unit 2 input, described rectification unit 2 output is connected with filter unit 3 input, and described filter unit 3 output is connected with No. 5 pins of power supply chip U1 with the series circuit of resistance R2 by resistance R1.Described filter unit 3 output is connected with transformer T1 input by peak absorbing unit 4, described transformer T1 output is connected with EMC filter unit 6, described peak absorbing unit drains with metal-oxide-semiconductor Q1 and is connected, described metal-oxide-semiconductor Q1 grid is connected with No. 6 pins of power supply chip U1 by discharge cell 7, and described metal-oxide-semiconductor Q1 source electrode is connected with No. 4 pins of switching power source chip U1 by antibomb unit 8.
Further, be connected with anti-lightning strike unit 1 between described ac power input end and rectification unit, described anti-lightning strike unit comprises piezo-resistance VZ1 and fusible link F1; Described fusible link F1 one end is connected with ac power input end, and the other end is connected with rectification unit, and described piezo-resistance VZ1 is connected in parallel on rectification unit input.
Further, described filter unit is the parallel circuits of electric capacity C1 and electric capacity C2.
Further, described peak absorbing unit is the buffer be made up of resistance R6, electric capacity C7 and diode D1, the positive pole of described diode D1 is connected with the drain electrode of metal-oxide-semiconductor Q1, and the negative pole of described diode D1 is connected with filter unit output with the series circuit of electric capacity C7 by resistance R3.
Further, described discharge cell comprises resistance R10 and diode D3, the positive pole of described diode D3 is connected with the grid of metal-oxide-semiconductor Q1, and the negative pole of described diode D3 is connected with No. 5 pins of switching power source chip U1, described diode D3 two ends parallel resistance R10.
Further, described EMC filter unit is the π type filter circuit of electric capacity C9, electric capacity C12 and inductance L 2 composition.
Further, voltage jump limiting unit 5 is connected with between described EMC filter unit and transformer T1 output, described voltage jump limiting unit comprises diode D9, resistance R20 and electric capacity C20, the output of described transformer T1 is connected with the positive pole of diode D9, the two ends of described diode D9 are parallel with the series circuit of resistance R20 and electric capacity C20, and the negative pole of described diode D9 is voltage jump limiting unit output.
Further, described antibomb unit is the parallel circuits of resistance R13, resistance R14, resistance R12 and voltage-stabiliser tube ZD1, the source electrode of described metal-oxide-semiconductor Q1 passes through the parallel circuits ground connection of resistance R13, resistance R14, resistance R12 and voltage-stabiliser tube ZD1, and the source electrode of described metal-oxide-semiconductor Q1 is connected with No. 4 pins of power supply chip U1 by resistance R9; The grid of described metal-oxide-semiconductor Q1 is by resistance R15 ground connection.When product is subject to abnormal operation, under causing product Inner portion circuit high voltage short circuit Qing Condition, the D/S pole short circuit of such as metal-oxide-semiconductor Q1, operationally there is the high pressure of more than 600V in D/S interpolar, a loop can be formed between input voltage-T1-Q1-R10 during short circuit, big current can be produced instantaneously, resistance R12/R13/R14 can generate heat instantaneously when the impact being subject to instantaneous large-current, body is caused to burst, the sound of blasting, simultaneously because blast can cause the eruption of part fragment and motlten metal, for avoiding causing this phenomenon, adopt the mode at R12/R13/R14 position shunt regulator tube ZD1, under product short circuit Qing Condition, voltage-stabiliser tube ZD1 is flow backwards, big current in loop is directly put on current protection part fusible link F1.Safer protection is reached by the normal cutoff of fusible link F1.The danger such as high temperature or foreign matter splashing can not be caused because of high voltage short circuit when guaranteeing the abnormal operation of product.
Although the foregoing describe embodiment of the present utility model; but those skilled in the art are to be understood that; these only illustrate; various changes or modifications can be made to present embodiment; and not deviating from principle of the present utility model and essence, protection range of the present utility model is only defined by the appended claims.
Claims (8)
1. a household electrical appliances power supply adaptor, it is characterized in that: comprise power supply chip U1, ac power input end is connected with rectification unit input, described rectification unit output is connected with filter unit input, and described filter unit output is connected with No. 5 pins of power supply chip U1 with the series circuit of resistance R2 by resistance R1; Described filter unit output is connected with transformer T1 input by peak absorbing unit, described transformer T1 output is connected with EMC filter unit, described peak absorbing unit drains with metal-oxide-semiconductor Q1 and is connected, described metal-oxide-semiconductor Q1 grid is connected with No. 6 pins of power supply chip U1 by discharge cell, and described metal-oxide-semiconductor Q1 source electrode is connected with No. 4 pins of switching power source chip U1 by antibomb unit.
2. according to household electrical appliances power supply adaptor according to claim 1, it is characterized in that: be connected with anti-lightning strike unit between described ac power input end and rectification unit, described anti-lightning strike unit comprises piezo-resistance VZ1 and fusible link F1; Described fusible link F1 one end is connected with ac power input end, and the other end is connected with rectification unit, and described piezo-resistance VZ1 is connected in parallel on rectification unit input.
3. according to household electrical appliances power supply adaptor according to claim 1, it is characterized in that: described filter unit is the parallel circuits of electric capacity C1 and electric capacity C2.
4. according to household electrical appliances power supply adaptor according to claim 1, it is characterized in that: described peak absorbing unit is the buffer be made up of resistance R6, electric capacity C7 and diode D1, the positive pole of described diode D1 is connected with the drain electrode of metal-oxide-semiconductor Q1, and the negative pole of described diode D1 is connected with filter unit output with the series circuit of electric capacity C7 by resistance R3.
5. according to household electrical appliances power supply adaptor according to claim 1, it is characterized in that: described discharge cell comprises resistance R10 and diode D3, the positive pole of described diode D3 is connected with the grid of metal-oxide-semiconductor Q1, the negative pole of described diode D3 is connected with No. 5 pins of switching power source chip U1, described diode D3 two ends parallel resistance R10.
6. according to household electrical appliances power supply adaptor according to claim 1, it is characterized in that: described EMC filter unit is the π type filter circuit of electric capacity C9, electric capacity C12 and inductance L 2 composition.
7. according to household electrical appliances power supply adaptor according to claim 6, it is characterized in that: between described EMC filter unit and transformer T1 output, be connected with voltage jump limiting unit, described voltage jump limiting unit comprises diode D9, resistance R20 and electric capacity C20, the output of described transformer T1 is connected with the positive pole of diode D9, the two ends of described diode D9 are parallel with the series circuit of resistance R20 and electric capacity C20, and the negative pole of described diode D9 is voltage jump limiting unit output.
8. according to household electrical appliances power supply adaptor according to claim 1, it is characterized in that: described antibomb unit is the parallel circuits of resistance R13, resistance R14, resistance R12 and voltage-stabiliser tube ZD1, the source electrode of described metal-oxide-semiconductor Q1 passes through the parallel circuits ground connection of resistance R13, resistance R14, resistance R12 and voltage-stabiliser tube ZD1, and the source electrode of described metal-oxide-semiconductor Q1 is connected with No. 4 pins of power supply chip U1 by resistance R9; The grid of described metal-oxide-semiconductor Q1 is by resistance R15 ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520173904.4U CN204481701U (en) | 2015-03-25 | 2015-03-25 | Household electrical appliances power supply adaptor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520173904.4U CN204481701U (en) | 2015-03-25 | 2015-03-25 | Household electrical appliances power supply adaptor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204481701U true CN204481701U (en) | 2015-07-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520173904.4U Expired - Fee Related CN204481701U (en) | 2015-03-25 | 2015-03-25 | Household electrical appliances power supply adaptor |
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| Country | Link |
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| CN (1) | CN204481701U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019015624A1 (en) * | 2017-07-19 | 2019-01-24 | Huawei Technologies Co., Ltd. | Three-level voltage bus apparatus and method |
-
2015
- 2015-03-25 CN CN201520173904.4U patent/CN204481701U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019015624A1 (en) * | 2017-07-19 | 2019-01-24 | Huawei Technologies Co., Ltd. | Three-level voltage bus apparatus and method |
| CN110771026A (en) * | 2017-07-19 | 2020-02-07 | 华为技术有限公司 | Three-level voltage bus apparatus and method |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150715 Termination date: 20200325 |
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| CF01 | Termination of patent right due to non-payment of annual fee |