CN202496005U - Standby low power consumption circuit and set-top box - Google Patents
Standby low power consumption circuit and set-top box Download PDFInfo
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- CN202496005U CN202496005U CN2012201165243U CN201220116524U CN202496005U CN 202496005 U CN202496005 U CN 202496005U CN 2012201165243 U CN2012201165243 U CN 2012201165243U CN 201220116524 U CN201220116524 U CN 201220116524U CN 202496005 U CN202496005 U CN 202496005U
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Abstract
The utility model discloses a standby low power consumption circuit and a set-top box. The standby low power consumption circuit comprises a main circuit unit, a plurality of functional circuit units and a plurality of controllable switch circuit units. The control end of each controllable switch circuit unit is respectively connected with a low power consumption control signal output terminal of the main circuit unit. The current outflow end of each controllable switch circuit unit is respectively connected with one of the functional circuit units, while the current inflow end of each controllable switch circuit unit is respectively connected with a power supply unit which provides power for the connected functional circuit unit. The standby low power consumption circuit provided by the utility model has the advantages of simple structure, low cost and strong versatility, and can be widely applied to set-top boxes with various different circuit schemes and other electrical products.
Description
Technical field
The utility model belongs to electric and electronic technical field, specifically, relates to a kind of standby low consumption circuit and has the STB of this circuit.
Background technology
Flourish along with the DTV cause, China becomes DTV STB production, manufacturing and use first big country.In order to advocate the theory of national energy savings, low carbon emission reduction, the power problems of STB more and more receives people's attention." STB efficiency limit value and efficiency grade " standard of national promotion and implementation on July 1 in 2011 has been done clear and definite regulation to the set-top box standby power consumption.In order to improve the performance of STB, require STB to realize the technical goal of stand-by power consumption less than 1W.
For realizing the standby low-power consumption, adopted various forms of standby low consumption circuits in the existing STB, under holding state, cut off the power supply of most of module, realize the standby low-power consumption.But existing standby low-power consumption circuit structure is complicated, and versatility is not strong, has increased the product circuit design difficulty, has prolonged product development cycle, and circuit cost is higher, thereby has increased product cost.
Summary of the invention
The purpose of the utility model is to provide a kind of simple in structure, highly versatile, standby low consumption circuit that cost is low.
For realizing above-mentioned technical purpose, the utility model adopts following technical scheme to be achieved:
A kind of standby low consumption circuit; Comprise main circuit unit and several function circuit unit; Also include several gate-controlled switch circuit units; The control end of each gate-controlled switch circuit unit connects a low power consumption control signal output terminal of said main circuit unit respectively; The electric current outflow end of each gate-controlled switch circuit unit connects one of them functional circuit unit respectively, and the electric current of gate-controlled switch circuit unit inflow end is connected with the power supply circuits unit that supplies power for the functional circuit unit that it was connected.
Aforesaid standby low consumption circuit; For realizing that less components and parts constitute the gate-controlled switch circuit; Said gate-controlled switch circuit unit includes first gate-controlled switch and second gate-controlled switch; The control end of first gate-controlled switch connects the low power consumption control signal output terminal of said main circuit unit through current-limiting resistance; Its electric current flows into end and connects said power supply circuits unit through resistance pressure-dividing network on the one hand, and the part divider resistance in resistance pressure-dividing network connects the control end of second gate-controlled switch on the other hand, its electric current outflow end ground connection; The electric current of second gate-controlled switch flows into end and connects said power supply circuits unit, and its electric current outflow end is connected with the said functional circuit unit of supplying power through the power supply circuits unit.
Aforesaid standby low consumption circuit; For further simplifying circuit structure; Said resistance pressure-dividing network comprises first divider resistance and second divider resistance of series connection, and first divider resistance, one end is connected with said power supply circuits unit, and the other end connects second divider resistance; The electric current of said first gate-controlled switch flows into end and is connected with the other end of second divider resistance, and then connects the control end of said second gate-controlled switch through second divider resistance.
Aforesaid standby low consumption circuit, for the electric current to the input function circuit unit carries out filtering, the electric current outflow end of said second gate-controlled switch is also through the first filter circuit ground connection.
Aforesaid standby low consumption circuit, said first filter circuit includes a filter capacitor, and an end of filter capacitor connects the electric current outflow end of said second gate-controlled switch, other end ground connection.
Aforesaid standby low consumption circuit; Said first gate-controlled switch is the NPN triode; Said second gate-controlled switch is a PMOS pipe, and the base stage of NPN triode connects the low power consumption control signal output terminal of said main circuit unit through current-limiting resistance, and its collector electrode connects said power supply circuits unit through said resistance pressure-dividing network on the one hand; Part divider resistance in resistance pressure-dividing network connects the grid of PMOS pipe, its grounded emitter on the other hand; The source electrode of PMOS pipe connects said power supply circuits unit, and its drain electrode is connected with the said functional circuit unit of supplying power through the power supply circuits unit.
Aforesaid standby low consumption circuit for the smooth conducting that guarantees triode with end, also is parallel with clamp resistance between the base stage of said NPN triode and the emitter.
Aforesaid standby low consumption circuit impacts to the PMOS pipe for preventing current transients, also is parallel with second filter capacitor between the grid of said PMOS pipe and the source electrode.
Aforesaid standby low consumption circuit, for ease of the output of signal with to the gate-controlled switch circuit control, the low power consumption control signal output terminal of said main circuit unit is the GPIO terminal of main circuit unit.
The utility model also provides a kind of STB simultaneously, comprises mainboard, and mainboard is provided with each described standby low consumption circuit in the aforesaid right requirement 1 to 9.
Compared with prior art; The advantage and the good effect of the utility model are: the discrete components and parts of the utility model utilization are built the standby low consumption circuit; Realize the low-power consumption of system under the situation that in the standby process, keeps main circuit unit not cut off the power supply, guaranteed that standby wakeup starts fast.Whole standby low-power consumption circuit structure is simple, and cost is lower, and versatility is stronger, can be widely used in can reducing the product design difficulty in the products such as STB of various different circuit arrangements, shortens product development cycle.
After the embodiment in conjunction with advantages the utility model, other characteristics of the utility model and advantage will become clearer.
Description of drawings
Fig. 1 is the structured flowchart of an embodiment of the utility model standby low consumption circuit;
Fig. 2 is the structured flowchart of another embodiment of the utility model standby low consumption circuit;
Fig. 3 is the circuit theory diagrams of an embodiment of gate-controlled switch circuit unit among Fig. 1 and Fig. 2.
Embodiment
Below in conjunction with accompanying drawing the embodiment of the utility model is carried out detailed description.
Please refer to Fig. 1, this is shown in Figure 1 to be the structured flowchart of an embodiment of the utility model.
This embodiment is example with the STB; The STB mainboard is provided with main circuit unit 11 and n functional circuit unit; Functional circuit unit 141 respectively as shown in Figure 1, functional circuit 142 ..., functional circuit unit 14n, utilize these circuit units to realize the circuit function of STBs.Power consumption during for the realization set-top box standby satisfies relevant stand-by power consumption requirement; On mainboard, also be provided with n gate-controlled switch circuit unit; Each gate-controlled switch circuit unit includes control end, electric current flows into end and electric current outflow end; Wherein, Its control end connects a low power consumption control signal output terminal of main circuit unit 11, and its electric current outflow end connects one of them functional circuit unit respectively, and its electric current inflow end is connected with the power supply circuits unit that supplies power for the functional circuit unit that it was connected.
Specifically; The control end of gate-controlled switch circuit unit 131 connects a low power consumption control signal output terminal of main circuit unit 11; Its electric current flows into end and connects power supply circuits unit 121, and its electric current outflow end connection needs the functional circuit unit 141 through 121 power supplies of power supply circuits unit; The control end of gate-controlled switch circuit unit 132 connects another low power consumption control signal output terminal of main circuit unit 11; Its electric current flows into end and connects power supply circuits unit 122, and its electric current outflow end connection needs the functional circuit unit 142 through 122 power supplies of power supply circuits unit; The control end of gate-controlled switch circuit unit 13n connects another low power consumption control signal output terminal of main circuit unit 11; Its electric current flows into end and connects power supply circuits unit 12n, and its electric current outflow end connection needs the functional circuit unit 14n through power supply circuits unit 12n power supply.
After main circuit unit 11 receives the standby signal that the user sends through remote controller or set top box operations panel; Main program in the main circuit unit 11 is closed all unwanted software modules; Get into true standby mode; Master chip in the main circuit unit 11 does not cut off the power supply, but current sinking is minimum, makes system works in the simplest state.Simultaneously; Each gate-controlled switch circuit unit that main circuit unit 11 is extremely connected through its low power consumption control signal output terminal output control signal corresponding; Controlling each gate-controlled switch circuit unit breaks off; Thereby cut off power supply circuits that the gate-controlled switch circuit unit connected and the electric current between the functional circuit unit, each functional circuit unit quits work fully, thereby reach the purpose of standby low-power consumption.
After master chip in the main circuit unit 11 of not outage received the standby wakeup signal, main circuit unit 11 was replied normal mode of operation fast.Simultaneously; Main circuit unit 11 to each the gate-controlled switch circuit unit that is connected, is controlled each gate-controlled switch circuit unit conducting through its low power consumption control signal output terminal output control signal corresponding, makes power supply circuits be communicated with functional circuit unit; The electric current that power supply circuits provide flows in the function corresponding circuit unit smoothly; Each functional circuit unit is started working, and complete machine gets into normal operating condition, has realized that standby wakes up fast.
Shown in Figure 2 is the structured flowchart of another embodiment of the utility model standby low consumption circuit.N the gate-controlled switch circuit unit that the standby low consumption circuit of this embodiment also includes main circuit unit 21, a m power supply circuits unit, a n functional circuit unit and is connected with each functional circuit unit, and m < n.Compare with first embodiment of Fig. 1; There are two differences in this Fig. 2 embodiment: one of which; Power supply circuits unit corresponding a plurality of functional circuit unit, for a plurality of functional circuit unit provide operating current, thereby; Accordingly, a power supply circuits unit can be connected with a plurality of gate-controlled switch circuit.Its two, n gate-controlled switch circuit unit all is connected with the same low power consumption control signal output terminal of main circuit unit 21, under the control of the low power consumption control signal of this control signal output ends output, opens or closes synchronously.
For instance, as shown in Figure 2, a low power consumption control signal output terminal of main circuit unit 21 is connected to gate-controlled switch circuit unit 231,232 is total to n unit until 23n control end respectively.Power supply circuits unit 221 provides operating current for functional circuit unit 241 and functional circuit unit 242 simultaneously, thereby the electric current of gate-controlled switch circuit unit 231 flows into end and connects power supply circuits unit 221, its electric current outflow end linkage function circuit unit 241; The electric current of gate-controlled switch circuit 232 flows into end and also connects power supply circuits unit 221, its electric current outflow end linkage function circuit unit 242.All the other annexations can saidly be analogized according to above-mentioned, do not launch one by one at this.The standby low consumption circuit operation principle of this Fig. 2 embodiment and process can be with reference to above-mentioned descriptions to Fig. 1 embodiment.
The gate-controlled switch circuit unit can adopt the structure of various different circuit forms to realize; Realization principle is the state that guarantees under the different control signals that the low power consumption control signal output part of main circuit unit 1 is exported, can work in disconnection or conducting, thereby realization lets the electric current of power supply circuits unit stop to the functional circuit unit circulation or normally flows into functional circuit unit.
Fig. 3 shows the circuit theory diagrams of an embodiment of gate-controlled switch circuit unit in Fig. 1 and Fig. 2 structured flowchart.
As shown in Figure 3, these circuit theory diagrams adopt two-stage gate-controlled switch and part capacitance resistance component to realize, can use less components and parts and simple circuit to realize the above-mentioned functions of gate-controlled switch circuit unit.The particular circuit configurations and the course of work are following:
Circuit includes a NPN triode Q13 and a PMOS pipe Q7, constitutes the two-stage gate-controlled switch.The base stage B of triode Q13 through current-limiting resistance R193 connect main circuit unit the low power consumption control signal output terminal, be its GPIO terminal, can not damage with base stage B and the emitter E of protection triode Q13 because of rush of current.The collector electrode C of triode Q13 on the one hand the resistance pressure-dividing network through resistance R 94 and resistance R 101 series connection formations be connected as the power supply circuits unit+the 5V power supply; The grid G that connects PMOS pipe Q7 on the other hand through one of them divider resistance R101, and the grounded emitter of triode Q13.Source S connections+5V the power supply of PMOS pipe Q7, and its drain D is connected with power supply 5V through the+functional circuit unit that the 5V power supply is supplied power.
When the GPIO of main circuit unit terminal output low level, triode Q13 ends, and its collector electrode C is a high level; At this moment, resistance R 94 does not have electric current to flow through with resistance R 101 basically, does not reach the dividing potential drop purpose; Therefore, there is not pressure reduction between the source S of PMOS pipe Q7 and the grid G utmost point, so; PMOS pipe Q7 turn-offs, and+5V power supply is cut off to the power supply of 5V power supply, and the function corresponding circuit unit quits work.
When the GPIO of main circuit unit terminal output high level, triode Q13 conducting, its collector electrode C is a low level; At this moment, there is electric current to flow through on resistance R 94 and the resistance R 101, reaches the purpose of dividing potential drop.Resistance through these two divider resistances of choose reasonable; Make between the source S of PMOS pipe Q7 and grid D, to form pressure reduction, and satisfy its turn-on condition, so; PMOS pipe Q7 conducting; + 5V power supply is normally to 5V power supply power supply, and electric current flows to functional circuit unit, the functional circuit unit operate as normal smoothly from+5V power supply.
In this embodiment, the drain D of PMOS pipe Q7 also is connected with capacitor C 209, and this capacitor C 209 is as filter capacitor, and other end ground connection is to carry out filtering to the electric current after the conducting.In addition, between the source S of PMOS pipe Q17 and grid G, be parallel with the second filter capacitor C33, with the transition of conducting moment PMOS managed Q7 and impact turn-offing to prevent electric current.And, between the base stage B of triode Q13 and emitter E, also be parallel with clamp resistance R138, to guarantee triode Q13 conducting successfully and to end, guarantee whole gate-controlled switch circuit control reliability.
Need to prove, to those skilled in the art, in the foregoing description except that adopt NPN triode Q13 and PMOS pipe Q7 as gate-controlled switch formation two-stage controlled, also can adopt the controlled tr tube of other types to realize.Except that adopting the independent electric capacity of C209 to carry out the filtering, also can also adopt structure such as capacitance-resistance filter to constitute filter circuit and carry out filtering.The foregoing description is not done the qualification like Fig. 2 to these circuit structures.
Above embodiment only in order to the technical scheme of explanation the utility model, but not limits it; Although the utility model has been carried out detailed explanation with reference to previous embodiment, for the person of ordinary skill of the art, still can make amendment to the technical scheme that previous embodiment is put down in writing, perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of relevant art scheme break away from the spirit and the scope of the utility model technical scheme required for protection.
Claims (10)
1. standby low consumption circuit; Comprise main circuit unit and several function circuit unit; It is characterized in that; Also include several gate-controlled switch circuit units; The control end of each gate-controlled switch circuit unit connects a low power consumption control signal output terminal of said main circuit unit respectively, and the electric current outflow end of each gate-controlled switch circuit unit connects one of them functional circuit unit respectively, and the electric current of gate-controlled switch circuit unit inflow end is connected with the power supply circuits unit that supplies power for the functional circuit unit that it was connected.
2. standby low consumption circuit according to claim 1; It is characterized in that; Said gate-controlled switch circuit unit includes first gate-controlled switch and second gate-controlled switch; The control end of first gate-controlled switch connects the low power consumption control signal output terminal of said main circuit unit through current-limiting resistance; Its electric current flows into end and connects said power supply circuits unit through resistance pressure-dividing network on the one hand, and the part divider resistance in resistance pressure-dividing network connects the control end of second gate-controlled switch on the other hand, its electric current outflow end ground connection; The electric current of second gate-controlled switch flows into end and connects said power supply circuits unit, and its electric current outflow end is connected with the said functional circuit unit of supplying power through the power supply circuits unit.
3. standby low consumption circuit according to claim 3; It is characterized in that; Said resistance pressure-dividing network comprises first divider resistance and second divider resistance of series connection, and first divider resistance, one end is connected with said power supply circuits unit, and the other end connects second divider resistance; The electric current of said first gate-controlled switch flows into end and is connected with the other end of second divider resistance, and then connects the control end of said second gate-controlled switch through second divider resistance.
4. standby low consumption circuit according to claim 2 is characterized in that, the electric current outflow end of said second gate-controlled switch is also through the first filter circuit ground connection.
5. standby low consumption circuit according to claim 4 is characterized in that, said first filter circuit includes a filter capacitor, and an end of filter capacitor connects the electric current outflow end of said second gate-controlled switch, other end ground connection.
6. according to each described standby low consumption circuit in the claim 2 to 5; It is characterized in that; Said first gate-controlled switch is the NPN triode; Said second gate-controlled switch is a PMOS pipe, and the base stage of NPN triode connects the low power consumption control signal output terminal of said main circuit unit through current-limiting resistance, and its collector electrode connects said power supply circuits unit through said resistance pressure-dividing network on the one hand; Part divider resistance in resistance pressure-dividing network connects the grid of PMOS pipe, its grounded emitter on the other hand; The source electrode of PMOS pipe connects said power supply circuits unit, and its drain electrode is connected with the said functional circuit unit of supplying power through the power supply circuits unit.
7. standby low consumption circuit according to claim 6 is characterized in that, also is parallel with clamp resistance between the base stage of said NPN triode and the emitter.
8. standby low consumption circuit according to claim 6 is characterized in that, also is parallel with second filter capacitor between the grid of said PMOS pipe and the source electrode.
9. according to each described standby low consumption circuit in the claim 1 to 5, it is characterized in that the low power consumption control signal output terminal of said main circuit unit is the GPIO terminal of main circuit unit.
10. a STB comprises mainboard, it is characterized in that, mainboard is provided with each described standby low consumption circuit in the aforesaid right requirement 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201165243U CN202496005U (en) | 2012-03-26 | 2012-03-26 | Standby low power consumption circuit and set-top box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201165243U CN202496005U (en) | 2012-03-26 | 2012-03-26 | Standby low power consumption circuit and set-top box |
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| CN202496005U true CN202496005U (en) | 2012-10-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012201165243U Expired - Lifetime CN202496005U (en) | 2012-03-26 | 2012-03-26 | Standby low power consumption circuit and set-top box |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103065871A (en) * | 2013-01-09 | 2013-04-24 | 深圳市元征软件开发有限公司 | Realizing circuit capable of reducing power consumption of electromagnetic relay |
| CN104270000A (en) * | 2014-09-10 | 2015-01-07 | 深圳市易联技术有限公司 | Thermal printer power supply soft start system for POS machine |
| CN104571028A (en) * | 2014-12-19 | 2015-04-29 | 珠海格力电器股份有限公司 | Energy-saving power supply control system and method |
| CN104752099A (en) * | 2015-03-06 | 2015-07-01 | 深圳怡化电脑股份有限公司 | Drive module of relay |
| CN109391137A (en) * | 2018-12-12 | 2019-02-26 | 哈工大机器人（岳阳）军民融合研究院 | Inhibit the soft starting circuit and method of power surge |
-
2012
- 2012-03-26 CN CN2012201165243U patent/CN202496005U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103065871A (en) * | 2013-01-09 | 2013-04-24 | 深圳市元征软件开发有限公司 | Realizing circuit capable of reducing power consumption of electromagnetic relay |
| CN104270000A (en) * | 2014-09-10 | 2015-01-07 | 深圳市易联技术有限公司 | Thermal printer power supply soft start system for POS machine |
| CN104571028A (en) * | 2014-12-19 | 2015-04-29 | 珠海格力电器股份有限公司 | Energy-saving power supply control system and method |
| CN104752099A (en) * | 2015-03-06 | 2015-07-01 | 深圳怡化电脑股份有限公司 | Drive module of relay |
| CN109391137A (en) * | 2018-12-12 | 2019-02-26 | 哈工大机器人（岳阳）军民融合研究院 | Inhibit the soft starting circuit and method of power surge |
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