CN101437126A - Power supply control method, circuit and television set - Google Patents
Power supply control method, circuit and television set Download PDFInfo
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- CN101437126A CN101437126A CNA2008101832762A CN200810183276A CN101437126A CN 101437126 A CN101437126 A CN 101437126A CN A2008101832762 A CNA2008101832762 A CN A2008101832762A CN 200810183276 A CN200810183276 A CN 200810183276A CN 101437126 A CN101437126 A CN 101437126A
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Abstract
The embodiment of the invention discloses a method for controlling power supply and a circuit thereof, and a television with the power supply control circuit, which relate to the technical field of television circuit, and realize a standby circuit with lower cost and low power consumption through improving the standby circuit inside the television. The power supply control circuit provided by the embodiment of the invention comprises an NPN type triode and a voltage regulator diode, wherein an emitter of the NPN type triode is connected with the low-voltage output end of a power supply device; a collector and a base of the NPN type triode are connected with the high-voltage output end of the power supply device; a negative electrode of the voltage regulator diode is connected with the base of the NPN type triode, while a positive electrode is connected to the ground; and the low-voltage output end is used for supplying electricity for CPU. The power supply control circuit provided by the embodiment of the invention is suitable for reducing standby power consumption of the television under the condition of increased lower cost.
Description
Technical field
The present invention relates to the TV set circuit technical field, the television set that relates in particular to a kind of method for controlling power supply, circuit and have this power-supplying circuit.
Background technology
In order to guarantee that electric equipment can accurately receive the remote-controlled start-up signal when the standby, must make that the supply power voltage of host CPU remains unchanged in the movement circuit, this just makes switching power circuit also in running order always when standby.
The stand-by power consumption of present television set is not all accomplished very low, and the stand-by power consumption of general television set is all more than 5W; That is to say that even the user has been arranged to holding state with TV, equally still there is bigger power consumption in the stand-by circuit of TV inside, has caused the waste of the energy.
A kind of stand-by circuit is disclosed in patent 200420097941.3, it comprises switch transformer and MCU, road output at described switch transformer is connected with a power supply switch circuit, under the situation of electrical equipment operate as normal, is the MCU power supply by the output of described power supply switch circuit; When electrical equipment is in holding state, utilize the reference voltage output end of switch transformer to power for MCU; Use this circuit, stand-by power consumption can reach below the 5W, but this circuit structure complexity, and the cost increase is bigger, is unfavorable for applying in household appliances.
Summary of the invention
Embodiments of the invention provide a kind of method for controlling power supply, circuit and have the television set of this power-supplying circuit, realize the low-power consumption standby circuit of lower cost by the stand-by circuit that improves television set inside.
For achieving the above object, embodiments of the invention adopt following technical scheme:
A kind of method for controlling power supply, comprise: between the low-voltage output of power supply device and high-voltage output end, introduce a NPN type triode and a voltage stabilizing didoe, the emitter of described NPN type triode connects described low-voltage output, collector electrode connects described high-voltage output end, and base stage connects described voltage stabilizing didoe; The base voltage of described NPN type triode is clamped down at a fixed voltage value output voltage values of described fixed voltage value described low-voltage output during and by described voltage stabilizing didoe greater than the output voltage values of described low-voltage output under the holding state less than operate as normal;
When operate as normal, the base voltage of described NPN type triode is lower than emitter voltage, and the not conducting of described NPN type triode is the CPU power supply by described low-voltage output; When holding state, the base voltage of described NPN type triode is higher than emitter voltage, and the conducting of described NPN type triode is the CPU power supply by described high-voltage output end by described NPN type triode.
A kind of power-supplying circuit comprises NPN type triode and voltage stabilizing didoe; The emitter of described NPN type triode is connected to the low-voltage output of power supply device, and its collector electrode and base stage all are connected to the high-voltage output end of power supply device; The negative pole of described voltage stabilizing didoe is connected to the base stage of described NPN type triode, plus earth; Described low-voltage output is used to the CPU power supply.
Further, the power-supplying circuit that provides of the embodiment of the invention has following characteristics:
At described low-voltage output output voltage values is 12V, when described high-voltage output end output voltage values is 26V, the scope of choosing of described voltage stabilizing didoe voltage stabilizing value for (6V, 12V);
At described low-voltage output output voltage values is 15V, when described high-voltage output end output voltage values is 65V, the scope of choosing of described voltage stabilizing didoe voltage stabilizing value for (3V, 15V).
Further, the power-supplying circuit that the embodiment of the invention provides has following characteristics: described power-supplying circuit also comprises first resistance, described first resistance is between the emitter of described low-voltage output and described NPN type triode, and perhaps described first resistance is between the collector electrode of described high-voltage output end and described NPN type triode.
Further, the power-supplying circuit that the embodiment of the invention provides has following characteristics: described power-supplying circuit also comprises second resistance, and described second resistance is between the base stage of described high-voltage output end and described NPN type triode.
Further, the power-supplying circuit that the embodiment of the invention provides has following characteristics: described power-supplying circuit also comprises first electric capacity, and described first electric capacity, one end connects the base stage of described NPN type triode, an end ground connection; Perhaps described first electric capacity, one end is connected to the base stage of described NPN type triode, an end ground connection by a resistance.
Further, the power-supplying circuit that the embodiment of the invention provides has following characteristics: described power-supplying circuit also comprises diode, and described diode cathode connects described low-voltage output, and negative pole connects the emitter of described NPN type triode.
Further, the power-supplying circuit that the embodiment of the invention provides has following characteristics: described power-supplying circuit also comprises second voltage stabilizing didoe, and the described second voltage stabilizing didoe negative pole connects the emitter of described NPN type triode, plus earth; The scope of choosing of the described second voltage stabilizing didoe voltage stabilizing value for (12V, 14V).
Further, the power-supplying circuit that the embodiment of the invention provides has following characteristics: described power-supplying circuit also comprises second electric capacity, and described second electric capacity, one end connects the emitter of described NPN type triode, an end ground connection.
A kind of television set, this television applications above-mentioned power-supplying circuit, and the power supply device of described power-supplying circuit is the switching mode power supply transformer multichannel rectifying output circuit in the television set.
The method for controlling power supply that the embodiment of the invention provides, circuit and have the television set of this power-supplying circuit, this power-supplying circuit is applied in the middle of the stand-by circuit of television set, in the past stand-by circuit is improved, make that the voltage of its switching mode power supply transformer output can drop to 1/2 under the normal condition even lower when television set enters holding state, the standby power of circuit has dropped to below the 5W, thereby has realized reducing the purpose of complete machine stand-by power consumption; Compared with prior art, the low-power consumption the when stand-by circuit of application embodiment of the invention power-supplying circuit not only can be realized standby, and also circuit structure is simple, convenient realization, and with respect to existing stand-by circuit, its cost increase seldom is beneficial to marketing.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, 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 control circuit figure in the embodiment of the invention one;
Fig. 2 is the concrete application of circuit shown in Figure 1 in the television set stand-by circuit;
Fig. 3 is the control circuit figure in the embodiment of the invention two;
Fig. 4 is the concrete application of circuit shown in Figure 3 in the television set stand-by circuit.
Embodiment
In order to realize the low-power consumption standby circuit of lower cost by the stand-by circuit that improves television set inside, the embodiment of the invention provides a kind of method for controlling power supply, circuit and has had the television set of this power-supplying circuit.Method for controlling power supply, circuit that the embodiment of the invention is provided below in conjunction with accompanying drawing and the television set with this power-supplying circuit are described in detail.
The method for controlling power supply that the embodiment of the invention provides, comprise: between the low-voltage output of power supply device and high-voltage output end, introduce a NPN type triode and a voltage stabilizing didoe, the emitter of described NPN type triode connects described low-voltage output, collector electrode connects described high-voltage output end, and base stage connects described voltage stabilizing didoe; The base voltage of described NPN type triode is clamped down at a fixed voltage value output voltage values of described fixed voltage value described low-voltage output during and by described voltage stabilizing didoe greater than the output voltage values of described low-voltage output under the holding state less than operate as normal;
When operate as normal, the base voltage of described NPN type triode is lower than emitter voltage, and the not conducting of described NPN type triode is the CPU power supply by described low-voltage output; When holding state, the base voltage of described NPN type triode is higher than emitter voltage, and the conducting of described NPN type triode is the CPU power supply by described high-voltage output end by described NPN type triode.
The method for controlling power supply that the embodiment of the invention provides, in the past stand-by circuit is improved, by introducing a NPN type triode and a voltage stabilizing didoe, be implemented under the normal operation with under the holding state and be the power supply of electrical equipment cpu circuit by different power output ends, make that the voltage of its switching mode power supply transformer output can drop to 1/2 under the normal condition even lower when television set enters holding state, the standby power of circuit has dropped to below the 5W, thereby has realized reducing the purpose of complete machine stand-by power consumption.
With a plurality of specific embodiments power-supplying circuit provided by the invention is described in detail below.
Embodiment one:
As shown in Figure 1, a kind of implementation of the power-supplying circuit that provides for the embodiment of the invention, described power-supplying circuit comprises NPN type triode Q and voltage stabilizing didoe D1; The emitter of described NPN type triode Q is connected to low-pressure end (described low-pressure end is provided by the low-voltage output of power supply device), and its collector electrode and base stage are connected to high-pressure side (described high-pressure side is provided by the high-voltage output end of power supply device); The negative pole of described voltage stabilizing didoe D1 is connected to the base stage of described NPN type triode, plus earth; Described low-pressure end is used to the host CPU power supply.
In circuit shown in Figure 1, also comprise current-limiting resistance R1, R2 and capacitor C 1; Described current-limiting resistance R1 is serially connected between the collector electrode of low-pressure end and described NPN type triode Q; Described current-limiting resistance R2 is serially connected between the base stage of high-pressure side and described NPN type triode Q; Described capacitor C 1 one ends connect the base stage of described NPN type triode Q, an end ground connection, and its effect is filtering.
Fig. 2 is the concrete application of circuit shown in Figure 1 in the television set stand-by circuit, the power-supplying circuit that provides for the embodiment of the invention of the part in the frame of broken lines wherein, the low-voltage output of described power supply device and high-voltage output end are provided by television set switch inside power transformer multichannel rectifying output circuit.
Under the situation of television set operate as normal, the voltage of described low-pressure end (place of 12V-1 shown in Fig. 2 node) remains on about 12V, and could guarantee like this provides normal working voltage for the host CPU partial circuit of back; The supply power voltage of sound power amplifier is general higher about 26V in television set, and we can be with the supply power voltage of the sound power amplifier high-pressure side as above-mentioned power-supplying circuit.At this moment, can normally play a role, so the voltage stabilizing value of voltage stabilizing didoe D1 is chosen scope and be should be that (6V 12V), chooses the voltage stabilizing didoe that the voltage stabilizing value is 9.1V in the present embodiment in order to make voltage stabilizing didoe.Under the situation of television set operate as normal, because the voltage stabilizing value of voltage stabilizing didoe D1 is 9.1V, then the base stage of triode Q (the B utmost point) voltage also is 9.1V, and emitter (the E utmost point) voltage of triode Q is 12V at this moment, so not conducting of triode V542.
When television set switches to holding state, in order to reduce stand-by circuit power consumption under the holding state, the voltage of described high-pressure side and low-pressure end is all reduced to original half, the voltage that is high-pressure side becomes about 12V, the voltage of low-pressure end becomes about 6V, at this moment voltage still remains on 9.1V to the base stage of triode Q (the B utmost point), and the emitter of triode Q (the E utmost point) voltage becomes 6V, triode Q conducting; Because the conducting of triode Q, the emitter voltage of triode Q is subjected to the influence of high-pressure side voltage, and voltage is clamped to 12V herein, thereby can guarantee to be the host CPU power supply.
The power-supplying circuit that the embodiment of the invention provides, this power-supplying circuit is applied in the middle of the stand-by circuit of television set, in the past stand-by circuit is improved, when the voltage that enters holding state, the output of its switching mode power supply transformer at television set drops to 1/2 under the normal condition, still can guarantee the normal power supply of host CPU, and this moment stand-by circuit power consumption about 5W; Compared with prior art, though using the stand-by circuit of embodiment of the invention power-supplying circuit be not clearly aspect the reduction power consumption, but its circuit structure is simple, the convenient realization, with respect to the existing stand-by circuit that stand-by power consumption can be controlled at equally about 5W, its cost increase seldom is beneficial to marketing.
Embodiment two:
As shown in Figure 3, the another kind of implementation of the power-supplying circuit that provides for the embodiment of the invention, described power-supplying circuit comprises NPN type triode Q and voltage stabilizing didoe D1; The emitter of described NPN type triode Q is connected to low-pressure end (described low-pressure end is provided by the low-voltage output of power supply device), and its collector electrode and base stage are connected to high-pressure side (described high-pressure side is provided by the high-voltage output end of power supply device); The negative pole of described voltage stabilizing didoe D1 is connected to the base stage of described NPN type triode, plus earth; Described low-pressure end is used to the host CPU power supply.
In power-supplying circuit shown in Figure 3, also comprise current-limiting resistance R1, R2, capacitor C 1, C2, voltage stabilizing didoe D2 and diode D3; Described current-limiting resistance R1 is serially connected between the collector electrode of high-pressure side and described NPN type triode Q; Described current-limiting resistance R2 is serially connected between the base stage of high-pressure side and described NPN type triode Q; Described capacitor C 1 one ends connect high-pressure side, and an end ground connection is played the effect of filtering; Described voltage stabilizing didoe D2 negative pole connects the emitter of described NPN type triode Q, and plus earth is used for stablizing the supply power voltage of CPU partial circuit; The anodal low-pressure end that connects of described diode D3, negative pole connects the emitter of described NPN type triode Q; Described capacitor C 2 one ends connect the emitter of described NPN type triode Q, and an end ground connection is played the effect of filtering.
Fig. 4 is the concrete application of circuit shown in Figure 3 in the television set stand-by circuit, the power-supplying circuit that provides for the embodiment of the invention of the part in the frame of broken lines wherein, the low-voltage output of described power supply device and high-voltage output end are provided by television set switch inside power transformer multichannel rectifying output circuit.
Under the situation of television set operate as normal, the voltage of described low-pressure end (place of 15V shown in Fig. 4 node) remains on about 15V, and could guarantee like this provides normal working voltage for the host CPU partial circuit of back; The voltage of described high-pressure side (place of 65V shown in Fig. 4 node) remains on about 65V.At this moment, can normally play a role, so the voltage stabilizing value of voltage stabilizing didoe D1 is chosen scope and be should be that (3V 15V), chooses the voltage stabilizing didoe that the voltage stabilizing value is 8.2V in the present embodiment in order to make voltage stabilizing didoe.Under the situation of television set operate as normal, because the voltage stabilizing value of diode D1 is 8.2V, then the base stage of triode Q (the B utmost point) voltage also is 8.2V, and this moment is because the effect of low-pressure end and diode VD515, the emitter of triode Q (the E utmost point) voltage clamp is to 14V, so not conducting of triode Q.
When television set switches to holding state, in order to reduce stand-by circuit power consumption under the holding state, the voltage of described high-pressure side and low-pressure end is all reduced to original 1/4, the voltage that is high-pressure side becomes about 15V, the voltage of low-pressure end becomes about 3V, at this moment voltage still remains on 8.2V to the base stage of triode Q (the B utmost point), and the emitter of triode Q (the E utmost point) voltage drops to 3V, triode Q conducting; Because the conducting of triode Q, the emitter voltage of triode Q is subjected to the influence of high-pressure side voltage, and voltage is clamped to 14V herein, thereby can guarantee to be the host CPU power supply.
The power-supplying circuit that the embodiment of the invention provides, this power-supplying circuit is applied in the middle of the stand-by circuit of television set, in the past stand-by circuit is improved, in the time of when the voltage that enters holding state, the output of its switching mode power supply transformer at television set drops to operate as normal 1/4, still can guarantee the normal power supply of host CPU, and the power consumption of stand-by circuit can be reduced to below the 2.5W at this moment; Compared with prior art, the stand-by circuit of application embodiment of the invention power-supplying circuit drops to stand-by power consumption lower, and its circuit structure is simple, convenient realization, and the cost increase seldom is beneficial to marketing.
The present invention also provides the television set with above-mentioned power-supplying circuit, and the power supply device of described power-supplying circuit is by the switching mode power supply transformer multichannel rectifying output circuit in this television set.
The television set that the embodiment of the invention provides, above-mentioned power-supplying circuit is applied in the middle of the stand-by circuit of television set, in the past stand-by circuit is improved, make that the voltage of its switching mode power supply transformer output can drop to 1/2 under the normal condition even lower when television set enters holding state, the standby power of circuit can drop to below the 2.5W, thereby has realized reducing the purpose of complete machine stand-by power consumption; Low-power consumption when television set provided by the invention not only can be realized standby, and its internal circuit is simple in structure, convenient realization, the cost increase seldom is beneficial to marketing.
The above; only be the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion by described protection range with claim.
Claims (10)
1, a kind of method for controlling power supply, it is characterized in that, comprise: between the low-voltage output of power supply device and high-voltage output end, introduce a NPN type triode and a voltage stabilizing didoe, the emitter of described NPN type triode connects described low-voltage output, collector electrode connects described high-voltage output end, and base stage connects described voltage stabilizing didoe; The base voltage of described NPN type triode is clamped down at a fixed voltage value output voltage values of described fixed voltage value described low-voltage output during and by described voltage stabilizing didoe greater than the output voltage values of described low-voltage output under the holding state less than operate as normal;
When operate as normal, the base voltage of described NPN type triode is lower than emitter voltage, and the not conducting of described NPN type triode is the CPU power supply by described low-voltage output; When holding state, the base voltage of described NPN type triode is higher than emitter voltage, and the conducting of described NPN type triode is the CPU power supply by described high-voltage output end by described NPN type triode.
2, a kind of power-supplying circuit is characterized in that, comprises NPN type triode and voltage stabilizing didoe; The emitter of described NPN type triode is connected to the low-voltage output of power supply device, and its collector electrode and base stage all are connected to the high-voltage output end of power supply device; The negative pole of described voltage stabilizing didoe is connected to the base stage of described NPN type triode, plus earth; Described low-voltage output is used to the CPU power supply.
3, power-supplying circuit according to claim 1 is characterized in that,
At described low-voltage output output voltage values is 12V, when described high-voltage output end output voltage values is 26V, the scope of choosing of described voltage stabilizing didoe voltage stabilizing value for (6V, 12V);
At described low-voltage output output voltage values is 15V, when described high-voltage output end output voltage values is 65V, the scope of choosing of described voltage stabilizing didoe voltage stabilizing value for (3V, 15V).
4, power-supplying circuit according to claim 1, it is characterized in that, described power-supplying circuit also comprises first resistance, described first resistance is between the emitter of described low-voltage output and described NPN type triode, and perhaps described first resistance is between the collector electrode of described high-voltage output end and described NPN type triode.
5, power-supplying circuit according to claim 1 is characterized in that, described power-supplying circuit also comprises second resistance, and described second resistance is between the base stage of described high-voltage output end and described NPN type triode.
6, power-supplying circuit according to claim 1 is characterized in that, described power-supplying circuit also comprises first electric capacity, and described first electric capacity, one end connects the base stage of described NPN type triode, an end ground connection; Perhaps described first electric capacity, one end is connected to the base stage of described NPN type triode, an end ground connection by a resistance.
7, power-supplying circuit according to claim 1 is characterized in that, described power-supplying circuit also comprises diode, and described diode cathode connects described low-voltage output, and negative pole connects the emitter of described NPN type triode.
8, power-supplying circuit according to claim 1 is characterized in that, described power-supplying circuit also comprises second voltage stabilizing didoe, and the described second voltage stabilizing didoe negative pole connects the emitter of described NPN type triode, plus earth; The scope of choosing of the described second voltage stabilizing didoe voltage stabilizing value for (12V, 14V).
9, power-supplying circuit according to claim 1 is characterized in that, described power-supplying circuit also comprises second electric capacity, and described second electric capacity, one end connects the emitter of described NPN type triode, an end ground connection.
10, a kind of television set is characterized in that, described television set has each described power-supplying circuit in the claim 2 to 9, and the power supply device of described power-supplying circuit is the switching mode power supply transformer multichannel rectifying output circuit in the television set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101832762A CN101437126A (en) | 2008-12-12 | 2008-12-12 | Power supply control method, circuit and television set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101832762A CN101437126A (en) | 2008-12-12 | 2008-12-12 | Power supply control method, circuit and television set |
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| Publication Number | Publication Date |
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| CN101437126A true CN101437126A (en) | 2009-05-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2008101832762A Pending CN101437126A (en) | 2008-12-12 | 2008-12-12 | Power supply control method, circuit and television set |
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| CN (1) | CN101437126A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103425235A (en) * | 2013-08-13 | 2013-12-04 | 佛山市顺德万和电气配件有限公司 | Single chip microcomputer low power consumption standby circuit and control method |
| CN102111595B (en) * | 2009-12-29 | 2014-12-10 | 康佳集团股份有限公司 | Central processing unit (CPU) supply circuit equipment |
| CN107888065A (en) * | 2017-12-22 | 2018-04-06 | 佛山市顺德区美的电热电器制造有限公司 | A kind of dynamic clamp circuit |
| CN110635678A (en) * | 2018-06-25 | 2019-12-31 | 青岛海信电器股份有限公司 | DC-DC variable voltage output circuit and terminal device |
-
2008
- 2008-12-12 CN CNA2008101832762A patent/CN101437126A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102111595B (en) * | 2009-12-29 | 2014-12-10 | 康佳集团股份有限公司 | Central processing unit (CPU) supply circuit equipment |
| CN103425235A (en) * | 2013-08-13 | 2013-12-04 | 佛山市顺德万和电气配件有限公司 | Single chip microcomputer low power consumption standby circuit and control method |
| CN107888065A (en) * | 2017-12-22 | 2018-04-06 | 佛山市顺德区美的电热电器制造有限公司 | A kind of dynamic clamp circuit |
| CN110635678A (en) * | 2018-06-25 | 2019-12-31 | 青岛海信电器股份有限公司 | DC-DC variable voltage output circuit and terminal device |
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Open date: 20090520 |