CN201477462U - Expansive flows steady voltage circuit and television with expansive flows steady voltage circuit - Google Patents
Expansive flows steady voltage circuit and television with expansive flows steady voltage circuit Download PDFInfo
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- CN201477462U CN201477462U CN200920175804XU CN200920175804U CN201477462U CN 201477462 U CN201477462 U CN 201477462U CN 200920175804X U CN200920175804X U CN 200920175804XU CN 200920175804 U CN200920175804 U CN 200920175804U CN 201477462 U CN201477462 U CN 201477462U
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Abstract
The utility model discloses an expansive flows steady voltage circuit and a television with the expansive flows steady voltage circuit, which relates to the technology of electronic circuits, and leads circuits to achieve steady voltage and increases the ability of current output. The utility model comprises a circuit input end and a circuit output end, and further comprises a steady voltage device and an expanding export current device which is connected with the steady voltage device, and the steady voltage device and the expanding export current device are respectively connected on the circuits between the circuit input end and the circuit output end. Voltage signals which are input by the circuit input end output needed steady voltage and expanding export current after passing through the steady voltage device and the expanding export current device. The expansive flows steady voltage circuit is substantially used in the television, and further is used in all electric equipment which need to be supplied power by a steady voltage expansive circuit.
Description
Technical field
The utility model relates to electronic circuit technology, relates in particular to a kind of televisor that expands the stream mu balanced circuit and have this expansion stream mu balanced circuit.
Background technology
On the televisor master control borad, master chip generally needs specific DC voltage to be its power supply, and the DC voltage that like this voltage conversion circuit need be set provides power circuit in the televisor converts the required specific voltage of master chip to and is its power supply.In present TV set circuit.Voltage conversion circuit adopts the voltage stabilizing integrated chip to realize usually, and for example 78XX series voltage stabilizer is used in many places in TV set circuit.78XX series integrated regulator is the integrated regulator of the output constant voltage used always, and output voltage has specifications such as 5V, 6V, 9V, 12V, 15V, 18V, 24V, and maximum output current is 1.5A.Current-limiting protection, overheating protection and overvoltage crowbar are contained in its inside.As LM7805, output voltage is constant 5V.
The inventor states in the process of voltage stabilizing in realization, finds that power supply has only 12V output in the small size LCD TV, does not have 5V output, if with LM7805 5V is arrived in the 12V voltage stabilizing, the load power consumption stream of 5V is greater than 1 ampere, and load is too heavy, the voltage stabilizer heating is serious, the load capacity deficiency.
Summary of the invention
The utility model embodiment provides a kind of televisor that expands the stream mu balanced circuit and have this expansion stream mu balanced circuit, makes circuit increase the output current ability when realizing voltage stabilizing.
For achieving the above object, the utility model adopts following technical scheme:
A kind of expansion stream mu balanced circuit comprises circuit input end and circuit output end; Also comprise stable-pressure device and be attached thereto the expansion output current device that connects that described stable-pressure device and expansion output current device are connected on the circuit between described circuit input end and the described circuit output end; The voltage signal of described circuit input end input is exported the burning voltage of demand and is enlarged output current through described stable-pressure device with after enlarging the output current device.
Preferably, described expansion output current device comprises first triode and second triode; The base stage of described first triode connects described stable-pressure device and connects described circuit input end by biasing resistor, and collector connects the base stage of second triode, and emitter connects described circuit input end; The base stage of described second triode connects the collector of first triode, and emitter connects described circuit output end, and collector connects described circuit input end.
Preferably, described first triode is the positive-negative-positive triode, and described second triode is a NPN type triode.
Preferably, described stable-pressure device comprises a voltage stabilizer and discrete first electrochemical capacitor, second electrochemical capacitor, the input end of described voltage stabilizer connects the base stage that enlarges first triode in the output current device and connects first electrochemical capacitor, output terminal connects described circuit output end and connects second electrochemical capacitor, the other end ground connection of described first electrochemical capacitor and second electrochemical capacitor.
Preferably, described voltage stabilizer is three-terminal voltage-stabilizing integrated regulator or low pressure difference linear voltage regulator.
A kind of televisor comprises and expands the stream mu balanced circuit that described expansion stream mu balanced circuit comprises circuit input end and circuit output end; Also comprise stable-pressure device and be attached thereto the expansion output current device that connects that described stable-pressure device and expansion output current device are connected on the circuit between described circuit input end and the described circuit output end; The voltage signal of described circuit input end input is exported the burning voltage of demand and is enlarged output current through described stable-pressure device with after enlarging the output current device.
Preferably, described expansion output current device comprises first triode and second triode; The base stage of described first triode connects described stable-pressure device and connects described circuit input end by biasing resistor, and collector connects the base stage of second triode, and emitter connects described circuit input end; The base stage of described second triode connects the collector of first triode, and emitter connects described circuit output end, and collector connects described circuit input end.
Preferably, described first triode is the positive-negative-positive triode, and described second triode is a NPN type triode.
Preferably, described stable-pressure device comprises a voltage stabilizer and discrete first electrochemical capacitor, second electrochemical capacitor, the input end of described voltage stabilizer connects the base stage that enlarges first triode in the output current device and connects first electrochemical capacitor, output terminal connects described circuit output end and connects second electrochemical capacitor, shown in the other end ground connection of first electrochemical capacitor and first electrochemical capacitor.
Preferably, described voltage stabilizer is three-terminal voltage-stabilizing integrated regulator or low pressure difference linear voltage regulator.
Compared with prior art, collector with the positive-negative-positive triode in the utility model is connected with the base stage of NPN type triode, the connected mode of this kind Darlington makes that the enlargement factor of triode is the product of two triode enlargement factors, thereby high electric current gain amplifier is provided; And the transmitter of NPN type triode is directly connected to the output of circuit, can effectively increase the output current of circuit; And there is feedback circuit the inside of stable-pressure device, makes the voltage of output do not expanded the influence of flowing mu balanced circuit, keeps required constant voltage.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, the accompanying drawing of required use is done to introduce simply in will describing embodiment below, apparently, accompanying drawing in describing below only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the electrical block diagram of the preferential embodiment of the utility model.
Embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
The utility model provides a kind of televisor that expands the stream mu balanced circuit and have this expansion stream mu balanced circuit, expand the stream mu balanced circuit and comprise circuit input end and circuit output end, also comprise stable-pressure device and be attached thereto the expansion output current device that connects that described stable-pressure device and expansion output current device are connected on the circuit between described circuit input end and the described circuit output end; The voltage signal of described circuit input end input is exported the burning voltage of demand and is enlarged output current through described stable-pressure device with after enlarging the output current device.
In order to save televisor complete machine cost, simplify circuit structure, the utility model is formed expansion stream mu balanced circuit with discrete component again, and its concrete circuit structure is as shown in Figure 1.
Referring to Fig. 1, the utility model comprises circuit input end Uin, circuit output end Uout, the first triode VT1, the second triode VT2 and voltage stabilizer IC1; Be connected with the first triode VT1, the second triode VT2 and voltage stabilizer IC1 between circuit input end Uin and the circuit output end Uout.
Wherein, the base stage of the described first triode VT1 connects the input end Vin of described voltage stabilizer IC1, and connects described circuit input end Uin by biasing resistor R1, and collector connects the base stage of the second triode VT2, and emitter connects described circuit input end Uin; The described conducting of stating the first triode VT1 mainly realizes by adjusting biasing resistor R1 with disconnection.The base stage of the described second triode VT2 connects the collector of the first triode VT1, and emitter connects described circuit output end Uout, and collector connects described circuit input end Uin.The described first triode VT1 is the positive-negative-positive triode, and the described second triode VT2 is a NPN type triode.
Triode has the effect of amplified current, make the output current of circuit increase, make output power of circuit increase, improve the carrying load ability of circuit, and adopt the connected mode of Darlington between this first triode VT1 and the second triode VT2, the connected mode of this kind Darlington makes that the enlargement factor of triode is the achievement of two triode enlargement factors, thereby high electric current gain amplifier is provided; And the transmitter of NPN type triode is directly connected to the output of circuit, can effectively increase the output current of circuit.
Stable-pressure device among the utility model embodiment comprises a voltage stabilizer IC1 and the discrete first electrochemical capacitor C1, the second electrochemical capacitor C2, the input end Vin of described voltage stabilizer IC1 connects base stage that enlarges the first triode VT1 in the output current device and the positive pole that connects the first electrochemical capacitor C1, output end vo ut connects described circuit output end Uout and connects the positive pole of the second electrochemical capacitor C2, the other end ground connection of the first electrochemical capacitor C1, the second electrochemical capacitor C2.This first electrochemical capacitor C1 and the second electrochemical capacitor C2 play filtering voltage regulation, and the inside of voltage stabilizer IC1 is provided with feedback circuit, and the voltage of output is not expanded the influence of stream mu balanced circuit, keeps required constant voltage.
The voltage stabilizer IC1 of present embodiment is three-terminal voltage-stabilizing integrated regulator or LDO (low dropoutregulator, low pressure difference linear voltage regulator); Wherein, described three-terminal voltage-stabilizing integrated regulator is specifically as follows but is not limited to 78XX series voltage stabilizer; Voltage stabilizer with this principle of stabilized voltage is the integrated regulator of the output constant voltage used always; the scope of its output voltage is more extensive; specifications such as 5V, 6V, 7V, 8V, 9V, 12V, 15V, 18V, 24V for example; satisfy different constant voltage demands; simultaneously because the inside of this series voltage stabilizer has current-limiting protection circuit, overheating protection circuit and overvoltage crowbar; can guarantee the serviceable life of this device, avoid because the process and the cost of the replacing device of the complexity that such device failure causes.
The circuit that the utility model provides is not only applicable to televisor, and is applicable to that all need voltage stabilizing to expand the electric equipment of current circuit power supply.
The above; it only is embodiment of the present utility model; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the variation that can expect easily or replacement all should be encompassed within the protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion by described protection domain with claim.
Claims (10)
1. one kind is expanded the stream mu balanced circuit, comprise circuit input end and circuit output end, it is characterized in that, also comprise stable-pressure device and be attached thereto the expansion output current device that connects that described stable-pressure device and expansion output current device are connected on the circuit between described circuit input end and the described circuit output end; The voltage signal of described circuit input end input is exported the burning voltage of demand and is enlarged output current through described stable-pressure device with after enlarging the output current device.
2. expansion stream mu balanced circuit according to claim 1 is characterized in that described expansion output current device comprises: first triode and second triode;
The base stage of described first triode connects described stable-pressure device and connects described circuit input end by biasing resistor, and collector connects the base stage of second triode, and emitter connects described circuit input end;
The base stage of described second triode connects the collector of first triode, and emitter connects described circuit output end, and collector connects described circuit input end.
3. expansion stream mu balanced circuit according to claim 2 is characterized in that described first triode is the positive-negative-positive triode, and described second triode is a NPN type triode.
4. expansion stream mu balanced circuit according to claim 1 and 2 is characterized in that described stable-pressure device comprises: a voltage stabilizer and discrete first electrochemical capacitor, second electrochemical capacitor; The input end of described voltage stabilizer connects the base stage that enlarges first triode in the output current device and connects first electrochemical capacitor, output terminal connects described circuit output end and connects second electrochemical capacitor, the other end ground connection of described first electrochemical capacitor and second electrochemical capacitor.
5. expansion stream mu balanced circuit according to claim 4 is characterized in that described voltage stabilizer is three-terminal voltage-stabilizing integrated regulator or low pressure difference linear voltage regulator.
6. a televisor comprises and expands the stream mu balanced circuit, and described expansion stream mu balanced circuit comprises circuit input end and circuit output end; It is characterized in that, also comprise stable-pressure device and be attached thereto the expansion output current device that connects that described stable-pressure device and expansion output current device are connected on the circuit between described circuit input end and the described circuit output end; The voltage signal of described circuit input end input is exported the burning voltage of demand and is enlarged output current through described stable-pressure device with after enlarging the output current device.
7. televisor according to claim 6 is characterized in that, described expansion output current device comprises first triode and second triode; The base stage of described first triode connects described stable-pressure device and connects described circuit input end by biasing resistor, and collector connects the base stage of second triode, and emitter connects described circuit input end;
The base stage of described second triode connects the collector of first triode, and emitter connects described circuit output end, and collector connects described circuit input end.
8. televisor according to claim 7 is characterized in that, described first triode is the positive-negative-positive triode, and described second triode is a NPN type triode.
9. according to claim 6 or 7 described televisors, it is characterized in that, described stable-pressure device comprises: a voltage stabilizer and discrete first electrochemical capacitor, second electrochemical capacitor, the input end of described voltage stabilizer connects the base stage that enlarges first triode in the output current device and connects first electrochemical capacitor, output terminal connects described circuit output end and connects second electrochemical capacitor, the other end ground connection of described first electrochemical capacitor and second electrochemical capacitor.
10. televisor according to claim 9 is characterized in that, described voltage stabilizer is three-terminal voltage-stabilizing integrated regulator or low pressure difference linear voltage regulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920175804XU CN201477462U (en) | 2009-08-27 | 2009-08-27 | Expansive flows steady voltage circuit and television with expansive flows steady voltage circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920175804XU CN201477462U (en) | 2009-08-27 | 2009-08-27 | Expansive flows steady voltage circuit and television with expansive flows steady voltage circuit |
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| Publication Number | Publication Date |
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| CN201477462U true CN201477462U (en) | 2010-05-19 |
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| CN200920175804XU Expired - Fee Related CN201477462U (en) | 2009-08-27 | 2009-08-27 | Expansive flows steady voltage circuit and television with expansive flows steady voltage circuit |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101887281A (en) * | 2010-06-29 | 2010-11-17 | 海洋王照明科技股份有限公司 | Current increasing and voltage stabilizing circuit |
| CN102025139A (en) * | 2010-11-11 | 2011-04-20 | 苏州合欣美电子科技有限公司 | Current expanding and limiting protection circuit of ecological house |
| CN102681585A (en) * | 2012-06-08 | 2012-09-19 | 黄勇 | Current expansion circuit for low-power integrated voltage stabilizer with three adjustable terminals |
| CN102707758A (en) * | 2012-06-20 | 2012-10-03 | 朱虹 | Current enlarging device of three-end adjustable voltage stabilizing block |
| CN105652948A (en) * | 2014-11-17 | 2016-06-08 | 上海岭芯微电子有限公司 | LDO external expansion circuit and method for manufacturing LDO external expansion structure thereof |
-
2009
- 2009-08-27 CN CN200920175804XU patent/CN201477462U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101887281A (en) * | 2010-06-29 | 2010-11-17 | 海洋王照明科技股份有限公司 | Current increasing and voltage stabilizing circuit |
| CN102025139A (en) * | 2010-11-11 | 2011-04-20 | 苏州合欣美电子科技有限公司 | Current expanding and limiting protection circuit of ecological house |
| CN102681585A (en) * | 2012-06-08 | 2012-09-19 | 黄勇 | Current expansion circuit for low-power integrated voltage stabilizer with three adjustable terminals |
| CN102707758A (en) * | 2012-06-20 | 2012-10-03 | 朱虹 | Current enlarging device of three-end adjustable voltage stabilizing block |
| CN105652948A (en) * | 2014-11-17 | 2016-06-08 | 上海岭芯微电子有限公司 | LDO external expansion circuit and method for manufacturing LDO external expansion structure thereof |
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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: 20100519 Termination date: 20120827 |