CN106159922A - Active X capacitor discharge control circuit - Google Patents
Active X capacitor discharge control circuit Download PDFInfo
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- CN106159922A CN106159922A CN201510201516.7A CN201510201516A CN106159922A CN 106159922 A CN106159922 A CN 106159922A CN 201510201516 A CN201510201516 A CN 201510201516A CN 106159922 A CN106159922 A CN 106159922A
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- transducer
- processor
- couples
- electric capacity
- active
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Abstract
The present invention proposes a kind of active X capacitor discharge control circuit, it is characterised in that this circuit includes: a power input, an X electric capacity, a synchronous rectifier, a transducer, a detecting voltage unit, a processor and a power output end.This X electric capacity is formed with this power input and couples, and this synchronous rectifier is formed with this X electric capacity and couples, and this transducer is formed with this synchronous rectifier and couples, and this processor and this power output end, this transducer and a detecting voltage unit are formed and couple.Wherein, this transducer has a switch element, and this processor is formed with this switch element of this transducer further and couples, and when this processor receives the numerical value of this detecting voltage unit less than second limits value, this processor exports a signal makes this electric power stored by X electric capacity discharge by this switch element.
Description
Technical field
The invention relates to a kind of active X capacitor discharge control circuit, and can in particular to one
Reduce circuitry components and the circuit framework of loss.
Background technology
When designing the power supply unit of big wattage, front end the most all can add EMI circuit makes product pass through peace
Rule specification, therefore the X electric capacity within EMI is when AC power-off, in order to avoid user gets an electric shock, all can be again
A big resistance in parallel, when its advantage is AC power-off, can make X electric capacity repid discharge, and shortcoming is then to increase
System loss.In order to overcome this shortcoming, the known practice is for adding a Relay circuit, by the one of big resistance
End connects with X electric capacity, and the other end is connected with the normal-closed end of Relay, and when AC inputs, Relay is switched to
Normally opened end, the biggest resistance does not constitutes loop and reduces loss；When AC power-off, Relay switches back into normally closed
End, now X electric capacity and big resistance constitute loop, make the X electric capacity can repid discharge.But, pursue now
Under the trend of low cost, the increase of any assembly or the loss of usefulness produce and are all possible to influence whether competition
Advantage.
Therefore, inventor is in view of the disappearance of known techniques, for solving known problem, is to think and the meaning of improvement
Read, propose the technology of a solution.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of active electric discharge capacitor control circuit, utilizes conversion
Switch element in device replaces known discharge resistance, thereby reduces assembly and the loss of Circuits System.
For reaching above-mentioned or other purpose, the present invention proposes a kind of active X capacitor discharge control circuit, and it is special
Levy and be that this circuit includes: a power input, an X electric capacity, a synchronous rectifier, a transducer,
One detecting voltage unit, a processor and a power output end.This X electric capacity is formed with this power input
Coupling, this synchronous rectifier is formed with this X electric capacity and couples, and this transducer is formed with this synchronous rectifier and couples,
This processor and this power output end, this transducer and a detecting voltage unit are formed and couple.Wherein, this turn
Parallel operation has a switch element, and this processor this switch element with this transducer further is formed and couples,
And when this processor receives the numerical value of this detecting voltage unit less than second limits value, this processor is defeated
Going out a signal makes this electric power stored by X electric capacity discharge by this switch element.
In sum, voltage quasi position determines that producing signal makes this X electricity to utilize processor to judge by the present invention
Hold and discharge by this switch element, and thereby reduce the big resistance needed for prior art and can reach reduction
The purpose of loss.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of present pre-ferred embodiments.
Detailed description of the invention
For above and other objects of the present invention, feature and advantage can be become apparent, cited below particularly preferably
Embodiment, and coordinate institute's accompanying drawings, it is described in detail below.
Referring to shown in Fig. 1, it is the circuit diagram of present pre-ferred embodiments.The present invention proposes one
Active X capacitor discharge control circuit, comprising: a power input (10), an X electric capacity (12),
One synchronous rectifier (13), a transducer (14), a detecting voltage unit (15), a processor (16)
And a power output end (11).This X electric capacity (12) is formed with this power input (10) and couples, should
Synchronous rectifier (13) is formed with this X electric capacity (12) and couples, this transducer (14) and this synchronous rectification
Device (13) is formed and couples, this processor (16) and this power output end (11), this transducer (14) and
One detecting voltage unit (15) is formed and couples.Furthermore, this transducer (14) can have a switch list further
Unit (140), and this processor (15) further with this switch element (140) shape of this transducer (14)
One-tenth couples.
Wherein, this power input (10) mainly provides the power source of integrated circuit, this power output end
(11) after then being changed via integrated circuit by electric power, output to other circuit or loads.This X electric capacity (12)
Being to store the electric power provided by this power input (10), this synchronous rectifier (13) can be by original
Alternating electromotive force is converted into direct current power.This transducer (14) can be switch type converter, as boost converter,
Step-down controller or the assembly of other equivalence, thereby increase by electric power according to demand or downgrade,
This switch element (140) in this transducer (14) can be then transistor (MOSFET) or other equivalence
Assembly.This processor (16) can be microprocessor (MCU) or other equivalent elements.
Furthermore, this processor (16) can have stage control function, when this detecting voltage unit (15)
When providing different voltage signal to this processor (16), this processor (16) is by control news different for output
Number.According to for the present embodiment, first receive this detecting voltage unit (15) when this processor (16)
When numerical value is less than first limits value, this transducer of stopping (14) is operated by this processor (16), thereby may be used
Maintain the basic running of integrated circuit.Then, the numerical value detected when this detecting voltage unit (15) is the lowest
During in the first limits value previously counted to the second limits value, this processor (16) makes exporting a signal
This electric power stored by X electric capacity (12) discharges by this switch element (140).And this signal be with
Fixed frequency exports, until this processor (16) cannot continue executing with function.Therefore X electric capacity (12) is stored up
The electric power deposited also will remain little, even if therefore user touches unintentionally the meaning that circuit also can be avoided getting an electric shock
Outer generation.
Although the present invention is disclosed above with preferred embodiment, so it is not limited to the present invention, any ripe
Practise this those skilled in the art, without departing from the spirit and scope of the present invention, when making a little change and retouching, because of
It is that claim is defined in the range of standard that this protection scope of the present invention is worked as.
Claims (5)
1. an active X capacitor discharge control circuit, it is characterised in that this circuit includes:
One power input；
One X electric capacity, it is formed with this power input and couples；
One synchronous rectifier, it is formed with this X electric capacity and couples；
One transducer, it forms with this synchronous rectifier and couples, and this transducer has a switch element；
One detecting voltage unit, it is formed with this transducer and couples；
One processor, it forms with this synchronous rectifier, this transducer and this detecting voltage unit and couples, and
This processor is formed with this switch element of this transducer further and couples；And
One power output end, it is formed with this transducer and couples；
Wherein, when this processor receives the numerical value of this detecting voltage unit less than second limits value, at this
Reason device exports a signal makes this electric power stored by X electric capacity discharge by this switch element.
Active X capacitor discharge control circuit the most as claimed in claim 1, it is characterised in that this processor receives
When numerical value to this detecting voltage unit is less than first limits value, this processor is by this transducer of stopping
Running, and this first limits value is more than this second limits value.
Active X capacitor discharge control circuit the most as claimed in claim 2, it is characterised in that this transducer is for cutting
Change formula transducer.
Active X capacitor discharge control circuit the most as claimed in claim 3, it is characterised in that this switch element is
MOSFET。
Active X capacitor discharge control circuit the most as claimed in claim 4, it is characterised in that this processor is micro-
Processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510201516.7A CN106159922A (en) | 2015-04-22 | 2015-04-22 | Active X capacitor discharge control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510201516.7A CN106159922A (en) | 2015-04-22 | 2015-04-22 | Active X capacitor discharge control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106159922A true CN106159922A (en) | 2016-11-23 |
Family
ID=57347051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510201516.7A Pending CN106159922A (en) | 2015-04-22 | 2015-04-22 | Active X capacitor discharge control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106159922A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108964430A (en) * | 2017-05-25 | 2018-12-07 | 中兴通讯股份有限公司 | The charging method and device of Switching Power Supply |
| US10355600B1 (en) | 2018-10-29 | 2019-07-16 | Chicony Power Technology Co., Ltd. | Power converter |
| CN110247540A (en) * | 2019-04-23 | 2019-09-17 | 苏州博创集成电路设计有限公司 | The input filter capacitor charge/discharge control circuit of non-coupled formula and the control method for using the circuit |
-
2015
- 2015-04-22 CN CN201510201516.7A patent/CN106159922A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108964430A (en) * | 2017-05-25 | 2018-12-07 | 中兴通讯股份有限公司 | The charging method and device of Switching Power Supply |
| US10355600B1 (en) | 2018-10-29 | 2019-07-16 | Chicony Power Technology Co., Ltd. | Power converter |
| CN110247540A (en) * | 2019-04-23 | 2019-09-17 | 苏州博创集成电路设计有限公司 | The input filter capacitor charge/discharge control circuit of non-coupled formula and the control method for using the circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20161123 |