CN201156709Y - Electric power adapter and portable electronic apparatus - Google Patents
Electric power adapter and portable electronic apparatus Download PDFInfo
- Publication number
- CN201156709Y CN201156709Y CNU2008200040992U CN200820004099U CN201156709Y CN 201156709 Y CN201156709 Y CN 201156709Y CN U2008200040992 U CNU2008200040992 U CN U2008200040992U CN 200820004099 U CN200820004099 U CN 200820004099U CN 201156709 Y CN201156709 Y CN 201156709Y
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- Prior art keywords
- rectifier diode
- diode group
- power supply
- bridge rectification
- rectification circuit
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Abstract
The utility model discloses a power adapter, which is characterized by comprising a power connector and a serial half-bridge rectification circuit. The serial half-bridge rectification circuit is connected with an AC power supply through the power connector so as to rectify the AC voltage of the AC power supply. Thus the utility model discloses a portable electronic device. The power adapter overcomes the defect of inefficient EFT resistance in the prior art. Without increasing the costs, the power adapter improves the EFT resistance of the power adapter, reduces the failure rate of the products, and enhances the stability of the circuit.
Description
Technical field
The utility model relates to technical field of electronic equipment, particularly relates to a kind of power supply adaptor and portable electric appts.
Background technology
Power supply adaptor is the power supply conversion equipment of small portable electronic device and electronic apparatus, generally is made up of shell, power connector and rectification circuit, can be divided into by its output type exchanging output type and direct current output type; Can be divided into Direct Plug-In and Table top type by connected mode.Power supply adaptor extensively is matched in the electronic equipments such as phone composite aircraft, game machine, language playback device, walkman, notebook, cell phone.Switch power source adapter is not owing to there is Industrial Frequency Transformer, so volume and weight is all very little, has only 20～30% of linear power supply, and the power transistor of switch power source adapter is operated on off state, so the power consumption on the transistor is little, the transformation efficiency height be generally 60～70%, and linear power supply has only 30～40%.
Switch power source adapter mainly comprises input line filter, input rectifying filter, converter, output rectifier filter, control circuit, protective circuit.Their function is: the input line filter: eliminate from electrical network, the interference as the switch of the startup of motor, electrical equipment, thunderbolt etc. produce also prevents that the high-frequency noise that Switching Power Supply produces from spreading to electrical network simultaneously.Input rectifying filter: the electrical network input voltage is carried out rectifying and wave-filtering, for converter provides direct voltage.Converter: the key component that is Switching Power Supply.It becomes high-frequency ac voltage to dc voltage conversion, and plays the effect that output and input electrical network are isolated.Output rectifier filter: the high-frequency ac voltage rectifying and wave-filtering of converter output is obtained the direct voltage that needs, also prevent the interference of high-frequency noise simultaneously to load.Control circuit: detect output dc voltage, and itself and reference voltage are compared, amplify.The pulse duration of modulating oscillator, thus the control change device is to keep the stable of output voltage.Protective circuit: when Switching Power Supply generation overvoltage, overcurrent short circuit, protective circuit quits work with protection load and power supply itself Switching Power Supply.
In order to solve problems such as the floating ground voltage of power supply adaptor, leakage current, prior art adopts the half-bridge rectification circuit to carry out rectification between interchange input front end (220V) and back level low-voltage circuit usually, as shown in Figure 1, is half-bridge rectification circuit structure chart in the prior art.
The shortcoming of prior art is that the anti-EFT of above-mentioned half-bridge rectification circuit (Electrical fast transient burst, Electrical Fast Transient/Burst (EFT) immunity to interference) ability is not enough.Because common a kind of glitch in electric and electromechanical equipment is produced by inductance components such as relay, motor, transformers, in general, these devices are somes that system forms, and often therefore disturb to produce in the inside of system.Electrical fast transient (eft) is to produce when being disconnected by the inductive load in the circuit.Be characterized in a series of pulse, so it is bigger to the influence of circuit.A series of pulse can produce cumulative effect at the input of circuit in the loop, makes the amplitude of interference level finally surpass the noise gate of circuit.On this mechanism, the cycle of pulse train is short more, and then the influence to circuit is big more.Because when each the pulse close proximity in the pulse train, the input capacitance of circuit does not have time enough discharge, just begins new charging again, is easy to the level that reaches higher, buries in oblivion normal input signal.When the inductive load switching system disconnects, can produce transient state harassing and wrecking (EFT) at the breakpoint place, this transient state harassing and wrecking are made up of a large amount of pulses.Measurement to the 220V power line shows, the amplitude of this impulse train at 100V between thousands of volts, concrete size is by the electrical characteristics of the switch contact (speed of opening as the contact, voltage withstand class when the contact disconnects, the mechanism of contact arc extinguishing etc.) decision, pulse repetition frequency is at 1kHz～1MHz, for individual pulse, its rising edge is in nanosecond, pulse duration tens nanoseconds to several milliseconds between.The non-constant width of the spectrum distribution of this harassing and wrecking signal, high-speed digital circuit is relatively more responsive to it, is harassed easily.
Be illustrated in figure 2 as in the prior art oscillogram of alternating voltage after the superimposed pulse, when alternating voltage at positive half cycle, no matter pulse is just or negative, the voltage after the stack is through rectifier diode, by capacitor filtering, clamper; When alternating voltage at negative half period, pulse train for just, superimposed voltage is lower than pulse amplitude, requires lower to diode; Ill-conditioned when negative half period, pulse train are peak value for negative and alternating voltage when alternating voltage, negative voltage and negative pulse stack make the reverse requirement of withstand voltage of rectifier bridge improve greatly, and general device is difficult to bear this high voltage and burns.
In realizing the utility model embodiment process, utility model inventor finds that there are the following problems at least in the prior art: because negative voltage and negative pulse stack may produce very large surge voltage, meeting punctures it owing to the reverse withstand voltage too low of diode, thereby can't guarantee the reliability of power supply adaptor.
The utility model content
Problem to be solved in the utility model provides a kind of power supply adaptor and portable electric appts, to solve the defective of the anti-Electrical Fast Transient/Burst (EFT) immunity to interference of power supply adaptor (EFT) scarce capacity in the prior art, reduces the damage of product rate.
For achieving the above object, the utility model embodiment provides a kind of power supply adaptor on the one hand, comprise a power connector and a tandem half-bridge rectification circuit, described tandem half-bridge rectification circuit links to each other with AC power by described power connector, and the alternating voltage of described AC power is carried out rectification.
On the other hand, the utility model embodiment also provides a kind of portable electric appts, comprises power supply adaptor:
Described power supply adaptor comprises a tandem half-bridge rectification circuit;
Described power supply adaptor carries out rectification by described tandem half-bridge rectification circuit to the voltage of AC power, exports to late-class circuit.
The technical scheme of the utility model embodiment has the following advantages, because adopt tandem half-bridge rectification circuit, principle by series aiding connection diode dividing potential drop, can effectively reduce the EFT impact that single diode bears, so overcome the defective of the anti-EFT scarce capacity of power supply adaptor in the prior art, and then obviously do not increased under the condition of cost, reached the anti-EFT ability of raising power supply adaptor, reduce the damage of product rate, improve the effect of circuit stability.
Description of drawings
Fig. 1 is a half-bridge rectification circuit structure chart in the prior art;
Fig. 2 is the oscillogram of alternating voltage after the superimposed pulse in the prior art;
Fig. 3 is the tandem half-bridge rectification circuit structural representation of being made up of the series diode group among the utility model embodiment one;
Fig. 4 is the tandem half-bridge rectification circuit structural representation that is composed in series by the half-bridge rectification circuit among the utility model embodiment two.
Fig. 5 is the structural representation of a kind of portable electric appts among the utility model embodiment three.
Embodiment
The utility model provides a kind of power supply adaptor, comprises a power connector and a tandem half-bridge rectification circuit, and this tandem half-bridge rectification circuit links to each other with AC power by power connector, and the alternating voltage of AC power is carried out rectification.This tandem half-bridge rectification circuit comprises forward rectifier diode group, negative sense rectifier diode group and bridges at filter capacitor between the above-mentioned two diode groups, and forward rectifier diode group is connected power connector and late-class circuit respectively with negative sense rectifier diode group.This forward rectifier diode group and negative sense rectifier diode group are made up of two or more diode series aiding connections respectively, also can replace with the high diode of one or more reverse breakdown voltages respectively.And above-mentioned tandem half-bridge rectification circuit can replace by connecting with two or more half-bridge rectification circuits, reaches identical effect.
Below in conjunction with drawings and Examples, embodiment of the present utility model is described in further detail:
As shown in Figure 3, be the utility model embodiment one, use two diodes to form forward rectifier diode group and negative sense rectifier diode group respectively, and use the filter capacitor bridge joint, form tandem half-bridge rectification circuit, thereby realized the increase of puncture voltage by the method for diode series connection dividing potential drop, improved the ability of the anti-EFT of circuit, reduced the damage of product rate.
The tandem half-bridge rectification circuit of present embodiment has used four diodes, consistent with the employed number of diodes of widely used bridge heap rectification circuit (full bridge rectifier) in the prior art, cost does not obviously increase, but the anti-EFT ability of circuit has increased by one times, has effectively reduced the damage of product rate.
As shown in Figure 4, be the utility model embodiment two, with two half-bridge rectification circuit series connection, the tandem half-bridge rectification circuit that has replaced the diode among the utility model embodiment one to be composed in series, thereby can realize the increase of puncture voltage by the connect method of dividing potential drop of diode equally, improve the ability of the anti-EFT of circuit, reduced the damage of product rate.
The tandem half-bridge rectified current circuit of present embodiment has used four diodes and two filter capacitors, consistent with the employed number of diodes of widely used bridge heap rectification circuit (full bridge rectifier) in the prior art, filter capacitor quantity increases by one, cost changes little, but the anti-EFT ability of circuit has increased by one times, filter effect is also more obvious, has effectively reduced the damage of product rate, has improved the power adaptation effect.
It is pointed out that in addition series diode group of the present utility model also can replace with the bigger single diode of puncture voltage, reaches effect similarly.
Series diode group among the above-mentioned utility model embodiment or half-bridge rectification circuit polyphone quantity are two; but in actual application; for the rectification effect that reaches requirements at the higher level or for satisfying the application demand of some special occasions; also can use a plurality of diodes to be composed in series series diode group or series connection half-bridge rectification circuit group, such improvement also should belong to protection range of the present utility model equally.
As shown in Figure 5, be the utility model embodiment three, a kind of portable electric appts comprises:
A power supply adaptor 1 and a late-class circuit 2 that contains tandem half-bridge rectification circuit 11.
The alternating voltage that contains 1 pair of AC power of power supply adaptor of tandem half-bridge rectification circuit 11 carries out rectification, to late-class circuit 2 outputs.
Wherein, the configuration mode of the tandem half-bridge rectification circuit among the configuration mode of the tandem half-bridge rectification circuit 11 in the power supply adaptor 1 and the utility model embodiment one and the embodiment two is consistent, and present embodiment is narrated no longer separately.
By using the technical scheme of the utility model embodiment, adopt tandem half-bridge rectification circuit, realized principle by series aiding connection diode dividing potential drop, the effect that the EFT that the single diode of effective reduction bears impacts, thereby overcome the defective of the anti-EFT scarce capacity of power supply adaptor in the prior art, and then obviously do not increased under the condition of cost, reached the anti-EFT ability of raising power supply adaptor, reduce the damage of product rate, improve the effect of circuit stability.
The above only is a preferred implementation of the present utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (10)
1, a kind of power supply adaptor, it is characterized in that, comprise a power connector and a tandem half-bridge rectification circuit, described tandem half-bridge rectification circuit links to each other with AC power by described power connector, and the alternating voltage of described AC power is carried out rectification.
2, power supply adaptor according to claim 1, it is characterized in that, described tandem half-bridge rectification circuit comprises forward rectifier diode group, negative sense rectifier diode group and filter capacitor, described forward rectifier diode group is connected described power connector and late-class circuit respectively with negative sense rectifier diode group, described filter capacitor bridge joint described forward rectifier diode group and negative sense rectifier diode group.
3, as power supply adaptor as described in the claim 2, it is characterized in that described forward rectifier diode group and negative sense rectifier diode group are made up of two or more diode series aiding connections respectively.
4, as power supply adaptor as described in the claim 2, it is characterized in that described forward rectifier diode group and negative sense rectifier diode group can replace with the high diode of one or more reverse breakdown voltages respectively.
5, power supply adaptor according to claim 1 is characterized in that described tandem half-bridge rectification circuit can be connected with two or more half-bridge rectification circuits and be replaced.
6, a kind of portable electric appts comprises power supply adaptor, it is characterized in that,
Described power supply adaptor comprises a tandem half-bridge rectification circuit;
Described power supply adaptor carries out rectification by described tandem half-bridge rectification circuit to the voltage of AC power, exports to late-class circuit.
7, as portable electric appts as described in the claim 6, it is characterized in that, described tandem half-bridge rectification circuit comprises forward rectifier diode group, negative sense rectifier diode group and filter capacitor, described forward rectifier diode group is connected described power connector and late-class circuit respectively with negative sense rectifier diode group, described filter capacitor bridge joint described forward rectifier diode group and negative sense rectifier diode group.
8, as portable electric appts as described in the claim 7, it is characterized in that described forward rectifier diode group and negative sense rectifier diode group are made up of two or more diode series aiding connections respectively.
9, as portable electric appts as described in the claim 7, it is characterized in that described forward rectifier diode group and negative sense rectifier diode group can replace with the high diode of one or more reverse breakdown voltages respectively.
10, as portable electric appts as described in the claim 6, it is characterized in that described tandem half-bridge rectification circuit can be connected with two or more half-bridge rectification circuits and be replaced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200040992U CN201156709Y (en) | 2008-02-04 | 2008-02-04 | Electric power adapter and portable electronic apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200040992U CN201156709Y (en) | 2008-02-04 | 2008-02-04 | Electric power adapter and portable electronic apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201156709Y true CN201156709Y (en) | 2008-11-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200040992U Expired - Lifetime CN201156709Y (en) | 2008-02-04 | 2008-02-04 | Electric power adapter and portable electronic apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201156709Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103795110A (en) * | 2014-01-21 | 2014-05-14 | 超威电源有限公司 | Gel battery charging adapter |
-
2008
- 2008-02-04 CN CNU2008200040992U patent/CN201156709Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103795110A (en) * | 2014-01-21 | 2014-05-14 | 超威电源有限公司 | Gel battery charging adapter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: HUAWEI DEVICE CO., LTD. Free format text: FORMER NAME: SHENZHEN HUAWEI TECHNOLOGY CO. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 518129 Longgang District, Guangdong, Bantian HUAWEI base B District, building 2, building No. Patentee after: Huawei Device Co., Ltd. Address before: 518129 Longgang District, Guangdong, Bantian HUAWEI base B District, building 2, building No. Patentee before: Shenzhen Huawei Communication Technology Co., Ltd. |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20171109 Address after: Metro Songshan Lake high tech Industrial Development Zone, Guangdong Province, Dongguan City Road 523808 No. 2 South Factory (1) project B2 -5 production workshop Patentee after: HUAWEI terminal (Dongguan) Co., Ltd. Address before: 518129 Longgang District, Guangdong, Bantian HUAWEI base B District, building 2, building No. Patentee before: Huawei Device Co., Ltd. |
|
| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20081126 |
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| CX01 | Expiry of patent term |