CN202548687U - Electronic device and control circuit thereof - Google Patents
Electronic device and control circuit thereof Download PDFInfo
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- CN202548687U CN202548687U CN2012200866477U CN201220086647U CN202548687U CN 202548687 U CN202548687 U CN 202548687U CN 2012200866477 U CN2012200866477 U CN 2012200866477U CN 201220086647 U CN201220086647 U CN 201220086647U CN 202548687 U CN202548687 U CN 202548687U
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- voltage
- circuit
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Abstract
The utility model discloses an electronic device, which comprises a first load, a second load and a control circuit, wherein the first load is connected in series with the second load through a first one-way connection element; the control circuit comprises a first switching unit, a second switching unit and a sampling control module; the first load is connected in series with the first one-way connection element and then is connected in parallel with the first switching unit; and the first one-way connection element is connected in series with the second load and then is connected in parallel with the second switching unit. The sampling control module is connected in parallel to the two ends of a branch consisting of the first load and the second load for sampling input voltage of the first load and the second load, and then a control signal is output through an output end of the electronic device to control connection or disconnection of the first switching unit and the second switching unit, so that a branch constituted by the first load and the second switching unit is connected in parallel with a branch constituted by the first switching unit and the second load, or the first load is connected in series with the second load through the first one-way connection element. According to the control circuit provided by the utility model, the connection mode of the two loads can be switched, so that the same electronic device is suitable for different input voltages.
Description
Technical field
The utility model relates to a kind of electronic installation and control circuit thereof.
Background technology
At present a lot of electronic products all need external power supply, and each electronic product also all can have strict requirement to external power source voltage scope, and promptly external power supply can not surpass the voltage range of electronic product.If the user does not know or does not have and tends to this electronic product is caused damage, even possibly produce unpredictable danger in strict accordance with requiring use or extraneous line voltage to uprise suddenly.In addition; Different input voltages; The civil power of the civil power of Chinese 220V and U.S. 110V for example, to a kind of electronic product, LED (light emitting diode for example; Light-Emitting Diode) luminous efficacy of lighting device has bigger influence, promptly is not suitable for two or more different input voltages with a kind of LED lighting device.Therefore, how, make with a kind of electronic product and be applicable to different input voltages, become hope in the anxious problem that will solve treated of the manufacturer of global marketing product through a kind of control circuit of design.
The utility model content
In view of this, be necessary to provide a kind of control circuit, to address the above problem.
A kind of control circuit; Be used to switch the connection status of one first load and one second load; This first load is connected with this second load through one first unidirectional breakover element; This control circuit comprises first switch element, second switch unit and a controlling of sampling module, and this first load and this first unidirectional breakover element series connection back are parallelly connected with this first switch element, and this first unidirectional breakover element and this second load series connection back are parallelly connected with this second switch unit; This controlling of sampling module is connected in parallel on the branch road two ends that are made up of first load and second load; This controlling of sampling module comprises that an output terminal is connected to the control end of first switch element and second switch unit; Be used for the input voltage of first load and second load is sampled; And satisfy first at sampled voltage and export one first control signal when pre-conditioned; Control the equal conducting of this first switch element and second switch unit, make the branch road that constitutes by first load that is inserted and second switch unit parallelly connected with the branch road that constitutes by first switch element and second load; This controlling of sampling module also satisfies second at sampled voltage and exports one second control signal when pre-conditioned, controls this first switch element and second switch unit and all breaks off, and first load is connected with second load through the first unidirectional breakover element.
Also be necessary to provide a kind of electronic installation.
A kind of electronic installation comprises first load, second load and a control circuit, and this first load is connected with this second load through one first unidirectional breakover element, and this control circuit is used to switch the connection status of one first load and one second load.This control circuit comprises first switch element, second switch unit and a controlling of sampling module; This first load and this first unidirectional breakover element series connection back are parallelly connected with this first switch element, and this first unidirectional breakover element and this second load series connection back are parallelly connected with this second switch unit; This controlling of sampling module is connected in parallel on the branch road two ends that are made up of first load and second load; This controlling of sampling module comprises that an output terminal is connected to the control end of first switch element and second switch unit; Be used for the input voltage of first load and second load is sampled; And satisfy first at sampled voltage and export one first control signal when pre-conditioned; Control the equal conducting of this first switch element and second switch unit, make the branch road that constitutes by first load that is inserted and second switch unit parallelly connected with the branch road that constitutes by first switch element and second load; This controlling of sampling module also satisfies second at sampled voltage and exports one second control signal when pre-conditioned, controls this first switch element and second switch unit and all breaks off, and first load is connected with second load through the first unidirectional breakover element.
The control circuit of the utility model; Through the sampling comparison module voltage at input load two ends is sampled, again sampled voltage and preset threshold voltage are compared, and control the conducting and the disconnection of electronic switch according to comparative result; Switch the connected mode of two loads; Thereby correspondingly the voltage at control load two ends is in the allowed band, and makes and to be applicable to different input voltages with a kind of electronic installation, reaches the purpose that improves power utilization efficient and power factor.
Description of drawings
Fig. 1 is applied to the structure principle chart in the LED electronic installation for a kind of control circuit that the utility model provides.
The structure principle chart of a kind of control circuit that Fig. 2 provides for the utility model first embodiment.
The structure principle chart of a kind of control circuit that Fig. 3 provides for the utility model second embodiment.
The main element symbol description
| |
100、100’ |
| |
10 |
| |
20、20’ |
| |
201 |
| The controlling of |
202、202’ |
| |
2021 |
| |
2022、2022’ |
| Generating circuit from reference voltage | 2023 |
| |
203 |
| The |
204 |
| |
30 |
| |
301 |
| |
302 |
| First divider resistance | R1 |
| Second divider resistance | R2 |
| The voltage sample point | P |
| Unidirectional breakover element | D1、D3 |
| Three terminal regulator | D2 |
| Anode tap | A |
| Reference edge | R |
| Cathode terminal | C |
| Output terminal | A0、A’0 |
| First input end | A1 |
| Second input end | A2 |
Following embodiment will combine above-mentioned accompanying drawing to further specify the utility model.
Embodiment
See also Fig. 1, a kind of electronic installation 100 comprises power supply 10, control circuit 20 and load 30, and wherein, this control circuit 20 is connected in parallel on the two ends of load 30.In this embodiment, this load 30 comprises first load 301 and second load 302, and this first load 301 is connected with this second load 302 through a unidirectional breakover element D1.In this embodiment, this electronic installation 100 is a LED electronic installation, and this first load 301 and second load 302 are respectively LED lamp string, and these two sections LED lamp strings have the LED light-emitting component of an equal number series connection.
This control circuit 20 is used to switch the connection status of first load 301 and second load 302, and this control circuit 20 comprises rectification circuit 201, controlling of sampling module 202, first switch element 203 and second switch unit 204.Wherein, two input ends of rectification circuit 201 are connected to the output terminal of external power supply 10, and two output terminals of rectification circuit 201 are connected to the two ends of load 30.This first load 301 and this unidirectional breakover element D1 series connection back are parallelly connected with this first switch element 203, and this unidirectional breakover element D1 and this second load 302 series connection backs are parallelly connected with this second switch unit 204.This controlling of sampling module 202 is connected in parallel between two output terminals of this rectification circuit 201; This controlling of sampling module 202 comprises that an output terminals A 0 is connected to the control end of first switch element 203 and second switch unit 204; This controlling of sampling module 202 is used for the input voltage of load 30 is sampled; Again sampled voltage and a preset threshold voltage are compared, and control the conducting and the disconnection of this first switch element 203 and second switch unit 204 according to comparative result.
In this embodiment; When sampled voltage satisfies first pre-conditioned; When for example being lower than this preset threshold voltage; This controlling of sampling module 202 is controlled this first switch element 203 and the 204 equal conductings of second switch unit through its output terminals A 0 output one first control signal, makes the branch road that is made up of first load 301 that is inserted and second switch unit 204 parallelly connected with the branch road that is made up of first switch element 203 and second load 302; When sampled voltage satisfies second pre-conditioned; When for example being higher than this preset threshold voltage; This controlling of sampling module 202 outputs one second control signal; Control this first switch element 203 and second switch unit 204 and all break off, first load 301 is connected with second load 302 through unidirectional breakover element D1.Like this, same electronic installation 100 is promptly applicable to different input voltages.
In one embodiment, as shown in Figure 2, this controlling of sampling module 202 comprises sample circuit 2021 and comparator circuit 2022, and wherein, this sample circuit 2021 is connected in parallel on the two ends of load 30.In this embodiment; This sample circuit 2021 comprises the first divider resistance R1 and the second divider resistance R2 of series connection; The connected node of this first divider resistance R1 and the second divider resistance R2 constitutes a voltage sample point P, is used for the input voltage of load 30 is sampled.This comparator circuit 2022 comprises a three terminal regulator D2; The reference edge R of this three terminal regulator D2 is connected with the voltage sample point P of this sample circuit 2021 through a unidirectional breakover element D3; The anode tap A ground connection of this three terminal regulator D2, cathode terminal C is connected to the control end of first switch element 203 and second switch unit 204.This three terminal regulator D2 compares sampled voltage and its internal reference voltage of the voltage sample point P that this reference edge R obtains, and according to comparative result this first control signal of output and this second control signal.In this embodiment; This three terminal regulator D2 is three terminal regulator TL431; This preset threshold voltage is made as with the internal reference voltage of this three terminal regulator D2 and equates; The sampled voltage that obtains as the reference edge R of this three terminal regulator D2 is during less than the internal reference voltage of this three terminal regulator D2, and this three terminal regulator D2 exports this first control signal, controls this first switch element 203 and 204 conductings of second switch unit; Otherwise then this second control signal of this three terminal regulator D2 output is controlled this first switch element 203 and 204 disconnections of second switch unit.
In another embodiment; As shown in Figure 3; This controlling of sampling module 202 ' comprises sample circuit 2021, generating circuit from reference voltage 2023 and comparator circuit 2022 ', and wherein, this comparator circuit 2022 ' comprises the first input end A1 and the second input end A2; The first input end A1 of this comparator circuit 2022 ' is connected to the voltage sample point P of this sample circuit 2021, is used to obtain the sampled voltage of this voltage sample point P.This generating circuit from reference voltage 2023 is used to produce this preset threshold voltage, and exports the second input end A2 of comparator circuit 2022 to.This comparator circuit 2022 ' compares the sampled voltage and this preset threshold voltage that obtain, and according to comparative result this first control signal of output and this second control signal.In this another embodiment, when the sampled voltage of this voltage sample point P during less than this preset threshold voltage, this comparator circuit 2022 ' is exported this first control signal, controls this first switch element 203 and 204 conductings of second switch unit; Otherwise then this comparator circuit 2022 ' is exported this second control signal, controls this first switch element 203 and 204 disconnections of second switch unit.In this another embodiment, this comparator circuit 2022 ' can adopt a voltage comparator, and like LM393 or LM358 etc., this first input end A1 and the second input end A2 be in normal phase input end and the inverting input of corresponding voltage comparer respectively.
Be appreciated that this first switch element 203 and second switch unit 204 all can adopt metal-oxide-semiconductor or transistor etc.
In order to understand the principle of work of the control circuit that the utility model provides better; Be input as example with the 220V interchange; The voltage detecting point is made as 1/2 place of input rated voltage, and promptly when the voltage of input when being 1/2 times of rated voltage, the voltage of this voltage sample point P equates with preset threshold voltage.When the voltage of importing was between 0 ~ 1/2 input rated voltage scope, sampled voltage was less than threshold voltage, and controlling of sampling module 202 is exported first control signal, two equal conductings of switch element, the SP of two sections LED lamps; When input voltage after greater than 1/2 rated voltage, sampled voltage is greater than threshold voltage, controlling of sampling module 202 outputs second control signal, two switch elements break off simultaneously, and the connected mode of two LED lamp strings is switched to series connection.
In sum, this first switch element 203 is controlled by instant supply voltage all with this second switch unit 204: when instant supply voltage is low, and first switch element 203 and the 204 equal conductings of second switch unit, the SP of two sections LED lamps; When instant voltage was higher, first switch element 203 all broke off with second switch unit 204, two sections LED lamp string series connection.
The control circuit of the utility model; Through the sampling comparison module voltage at input load two ends is sampled, again sampled voltage and preset threshold voltage are compared, and control the conducting and the disconnection of electronic switch according to comparative result; Switch the connected mode of two sections LED lamp strings; Thereby correspondingly the voltage at control load two ends is in the allowed band, and makes and to be applicable to different input voltages with a kind of electronic installation, reaches the purpose that improves power utilization efficient and power factor.
Claims (10)
1. control circuit; Be used to switch the connection status of one first load and one second load; This first load is connected with this second load through one first unidirectional breakover element; It is characterized in that: this control circuit comprises first switch element, second switch unit and a controlling of sampling module, and this first load and this first unidirectional breakover element series connection back are parallelly connected with this first switch element, and this first unidirectional breakover element and this second load series connection back are parallelly connected with this second switch unit; This controlling of sampling module is connected in parallel on the branch road two ends that are made up of first load and second load; This controlling of sampling module comprises that an output terminal is connected to the control end of first switch element and second switch unit; Be used for the input voltage of first load and second load is sampled; And satisfy first at sampled voltage and export one first control signal when pre-conditioned; Control the equal conducting of this first switch element and second switch unit, make the branch road that constitutes by first load that is inserted and second switch unit parallelly connected with the branch road that constitutes by first switch element and second load; This controlling of sampling module also satisfies second at sampled voltage and exports one second control signal when pre-conditioned, controls this first switch element and second switch unit and all breaks off, and first load is connected with second load through the first unidirectional breakover element.
2. control circuit as claimed in claim 1 is characterized in that, this controlling of sampling module comprises a sample circuit and a comparator circuit, and this sample circuit is connected in parallel on the branch road two ends that are made up of first load and second load.
3. control circuit as claimed in claim 2; It is characterized in that; This sample circuit comprises first divider resistance and second divider resistance of series connection; Connected node between this first divider resistance and second divider resistance constitutes voltage sample point, is used for the input voltage of first load and second load is sampled.
4. control circuit as claimed in claim 3; It is characterized in that this comparator circuit comprises a three terminal regulator, the reference edge of this three terminal regulator is connected with the voltage sample point of this sample circuit; Anode tap ground connection; Cathode terminal is connected to the control end of first switch element and second switch unit, and this three terminal regulator compares sampled voltage and its internal reference voltage of the voltage sample point that this reference edge obtains, and according to comparative result this first control signal of output and this second control signal.
5. control circuit as claimed in claim 3; It is characterized in that this comparator circuit adopts a voltage comparator, comprise the first input end and second input end; The first input end of this comparator circuit is connected to the voltage sample point of this sample circuit, is used to obtain the sampled voltage of this voltage sample point; This controlling of sampling module also comprises generating circuit from reference voltage; Be used to produce a threshold voltage; And export second input end of comparator circuit to; This comparator circuit compares the sampled voltage and this threshold voltage that obtain, and according to comparative result this first control signal of output and this second control signal.
6. an electronic installation comprises first load, second load and a control circuit, and this first load is connected with this second load through one first unidirectional breakover element, and this control circuit is used to switch the connection status of one first load and one second load; It is characterized in that: this control circuit comprises first switch element, second switch unit and a controlling of sampling module; This first load and this first unidirectional breakover element series connection back are parallelly connected with this first switch element, and this first unidirectional breakover element and this second load series connection back are parallelly connected with this second switch unit; This controlling of sampling module is connected in parallel on the branch road two ends that are made up of first load and second load; This controlling of sampling module comprises that an output terminal is connected to the control end of first switch element and second switch unit; Be used for the input voltage of first load and second load is sampled; And satisfy first at sampled voltage and export one first control signal when pre-conditioned; Control the equal conducting of this first switch element and second switch unit, make the branch road that constitutes by first load that is inserted and second switch unit parallelly connected with the branch road that constitutes by first switch element and second load; This controlling of sampling module also satisfies second at sampled voltage and exports one second control signal when pre-conditioned, controls this first switch element and second switch unit and all breaks off, and first load is connected with second load through the first unidirectional breakover element.
7. electronic installation as claimed in claim 6 is characterized in that, this controlling of sampling module comprises a sample circuit and a comparator circuit, and this sample circuit is connected in parallel on the branch road two ends that are made up of first load and second load.
8. electronic installation as claimed in claim 7; It is characterized in that; This sample circuit comprises first divider resistance and second divider resistance of series connection; Connected node between this first divider resistance and second divider resistance constitutes voltage sample point, is used for the input voltage of first load and second load is sampled.
9. electronic installation as claimed in claim 8; It is characterized in that this comparator circuit comprises a three terminal regulator, the reference edge of this three terminal regulator is connected with the voltage sample point of this sample circuit; Anode tap ground connection; Cathode terminal is connected to the control end of first switch element and second switch unit, and this three terminal regulator compares sampled voltage and its internal reference voltage of the voltage sample point that this reference edge obtains, and according to comparative result this first control signal of output and this second control signal.
10. electronic installation as claimed in claim 8; It is characterized in that this comparator circuit adopts a voltage comparator, comprise the first input end and second input end; The first input end of this comparator circuit is connected to the voltage sample point of this sample circuit, is used to obtain the sampled voltage of this voltage sample point; This controlling of sampling module also comprises generating circuit from reference voltage; Be used to produce a threshold voltage; And export second input end of comparator circuit to; This comparator circuit compares the sampled voltage and this threshold voltage that obtain, and according to comparative result this first control signal of output and this second control signal.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200866477U CN202548687U (en) | 2012-03-09 | 2012-03-09 | Electronic device and control circuit thereof |
| TW101205047U TWM438072U (en) | 2012-03-09 | 2012-03-21 | Electronic device and its control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200866477U CN202548687U (en) | 2012-03-09 | 2012-03-09 | Electronic device and control circuit thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202548687U true CN202548687U (en) | 2012-11-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200866477U Expired - Fee Related CN202548687U (en) | 2012-03-09 | 2012-03-09 | Electronic device and control circuit thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN202548687U (en) |
| TW (1) | TWM438072U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105517243A (en) * | 2016-01-13 | 2016-04-20 | 合肥云杉光电科技有限公司 | LED (light emitting diode) automatic-control serial and parallel circuit for alternating current direct-drive LED and method |
| CN106793253A (en) * | 2016-11-24 | 2017-05-31 | 深圳市明微电子股份有限公司 | A kind of LED linear constant-current drive circuit and LED light device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101582450B1 (en) * | 2015-08-13 | 2016-01-21 | 주식회사 실리콘웍스 | Lighting apparatus |
-
2012
- 2012-03-09 CN CN2012200866477U patent/CN202548687U/en not_active Expired - Fee Related
- 2012-03-21 TW TW101205047U patent/TWM438072U/en not_active IP Right Cessation
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105517243A (en) * | 2016-01-13 | 2016-04-20 | 合肥云杉光电科技有限公司 | LED (light emitting diode) automatic-control serial and parallel circuit for alternating current direct-drive LED and method |
| CN106793253A (en) * | 2016-11-24 | 2017-05-31 | 深圳市明微电子股份有限公司 | A kind of LED linear constant-current drive circuit and LED light device |
| CN106793253B (en) * | 2016-11-24 | 2018-12-28 | 深圳市明微电子股份有限公司 | A kind of LED linear constant-current drive circuit and LED light device |
Also Published As
| Publication number | Publication date |
|---|---|
| TWM438072U (en) | 2012-09-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121121 Termination date: 20130309 |