CN102404625A - Set-top box and standby control method thereof - Google Patents

Set-top box and standby control method thereof Download PDF

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Publication number
CN102404625A
CN102404625A CN2011103537768A CN201110353776A CN102404625A CN 102404625 A CN102404625 A CN 102404625A CN 2011103537768 A CN2011103537768 A CN 2011103537768A CN 201110353776 A CN201110353776 A CN 201110353776A CN 102404625 A CN102404625 A CN 102404625A
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China
Prior art keywords
master chip
width
power supply
resistance
pulse
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CN2011103537768A
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CN102404625B (en
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许生明
郭先概
陈烨
高伟
李登彪
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BEIJING CYCLE CENTURY TECHNOOGY CO., LTD.
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BEIJING CYCLE CENTURY DIGITAL TECHNOLOGY Co Ltd
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Abstract

The invention discloses a set-top box and a standby control method thereof. The set-top box comprises a switch, a power supply unit and a converting circuit, wherein the switch comprises a master chip with a plurality of units; the power supply unit is used for directly outputting voltage to the units, which are related to the standby state, in the master chip and used for outputting voltage to the units, which are not related to the standby state, in the master chip through the switch; the converting circuit is used for changing the voltage output by the power supply unit according to the width of an output impulse of the master chip; the master chip is used for switching off the switch when the set-top box is to be standby and for adjusting the width of the output impulse; and when the system is aroused, the switch is switched on, and the width of the output impulse is restored. The invention can further reduce the power consumption of a main board in the standby state under the premise that the functions of normal working and standby arousing of the set-top box are met.

Description

A kind of STB and standby controlling method thereof
Technical field
The present invention relates to the cable TV field, be specifically related to a kind of STB and standby controlling method thereof.
Background technology
In conventional use, adopt single-chip microcomputer stand-by circuit control set-top box standby and arousal function, but the single-chip microcomputer standby can only respond the application of traditional IR remote controller, can't satisfy the intelligent terminal user and use the wireless application that waits remote controller of 2.4G.In the circuit that uses the master chip standby; Because the power consumption of high capacity power supply under holding state is difficult to control; Independent master chip GPIO (General Purpose Input Output, general input) Opportunity awaiting control for linear exists the too high problem of mainboard stand-by power consumption.
The processing scheme of existing master chip standby mainly comprises:
A kind of method is to be the independent designing power supply of the module of master chip stand-by operation, and this power supply all is assurance work under any state, as shown in Figure 1, and in this scheme, the electric power system structure is divided into two parts, connects master chip and peripheral circuit respectively:
The one, the normal power supply unit guarantees the normal operation of system's each item function.In normal operating conditions, this partial circuit is opened.Under holding state, this part is closed by master chip.
The 2nd, the standby power supply unit, this part is in the stable power-supplying state always.When system need get into holding state, close the normal power supply unit by master chip, keep stable power-supplying by the standby power supply unit this moment, guaranteeing that master chip can wake control up in the normal response outside, wakes up or button wakes up like remote controller.
The shortcoming of this solution is to need extra electric power system, to guarantee the normal operation of system, has improved the overall applicability cost of system.
Also have a kind of method as shown in Figure 2, the normal power supply unit connects the part unit in master chip and the peripheral circuit through switch, also directly connects other unit in master chip and the peripheral circuit in addition; Utilize master chip to carry out switch control, open or close the said switch on the external power supply path; Behind response Opportunity awaiting control for linear signal, master chip is closed said switch, to reach the power supply of closed portion unit under the holding state, reduces the purpose of power consumption; After closing said switch; A part of unit relevant with wake-up signal in master chip and the peripheral circuit is still supplied power by the normal power supply unit; When the response wake-up signal, master chip just can be opened the said switch on the external power supply path, thereby guarantees the operate as normal of each functional module.
This circuit relies on switch (being generally metal-oxide-semiconductor) control stand-by power consumption merely; Under the standard of the standby that requires less than 1W; Under the not high situation of some power supply chip efficient, emergent power is critical or surpass the situation of code requirement sometimes for the power under the holding state.
Summary of the invention
The technical problem that the present invention will solve is how under the prerequisite that satisfies STB operate as normal and standby wakeup function, further reduces the power consumption of mainboard under holding state.
In order to address the above problem, the invention provides a kind of STB, comprising:
Switch, comprise the master chip of a plurality of unit;
Power supply unit is used for directly to the said master chip unit output voltage relevant with holding state, and through said switch in said master chip and the unit output voltage that has nothing to do of holding state;
Also comprise: change-over circuit is used for changing according to the width of said master chip output pulse the height of the voltage of said power supply unit output;
Said master chip is used for when preparing standby, closing said switch, and the width of adjustment output pulse; When waken system, open said switch, and recover the width of output pulse.
Further, described STB also comprises:
Peripheral circuit;
Said power supply unit also is used for direct to the said peripheral circuit unit output voltage relevant with holding state, and passes through the unit output voltage that said switch has nothing to do with holding state in said peripheral circuit.
Further, it is wide that said master chip will export the width accent of pulse when preparing standby.
Further, the width of adjusted pulse can make the voltage of power supply unit output reduce, and enough holding states use down.
Further, said power supply unit comprises power supply chip and peripheral circuit thereof;
Said change-over circuit is meant according to the height that the width of said master chip output pulse changes the voltage of said power supply unit output:
Said change-over circuit changes the equivalent resistance of said power supply chip feedback pin according to the width of said master chip output pulse.
Further, said change-over circuit comprises:
First, second, third, fourth resistance and electric capacity;
Wherein, after said first, second, third resistance is connected successively, be connected between the feedback pin of pulse output pin and power supply chip of master chip;
Said the 4th resistance one end is connected on the tie point of first, second resistance other end ground connection;
Said electric capacity one end is connected on the tie point of second, third resistance other end ground connection.
Further, the parameter of said first, second, third resistance is respectively 0R, 20K/1%, 309K/1%; Be connected the tie point of first, second resistance and the 4th resistance between the ground, parameter is 20K/1%, and is connected the tie point of second, third resistance and first electric capacity between the ground, and parameter is 0.1 μ F
The present invention also provides a kind of standby controlling method of STB, and said STB comprises master chip at least, and said method comprises:
When preparing standby, stop the unit output voltage that in master chip, has nothing to do with holding state; The width of adjustment master chip output pulse;
When waken system, recover the width of master chip output pulse, and recover in master chip and the irrelevant unit output voltage of holding state;
Change the height of the voltage of unit output relevant with holding state in master chip according to the width of adjusted output pulse.
Further, the width of said adjustment master chip output pulse is meant that the width that master chip is exported pulse transfers wide.
Further, the width of adjusted pulse can make the voltage of power supply unit output reduce, and enough holding states use down.
Technical scheme of the present invention can dynamically be adjusted supply power voltage; Under the prerequisite that satisfies STB operate as normal and standby wakeup function; Further reduce the power consumption of mainboard under holding state, can satisfy the standard of national radio and television departments, can behind system wake-up, guarantee normal operating voltage simultaneously.Technical scheme of the present invention.Prioritization scheme of the present invention can be implemented in through four resistance and an electric capacity and reduce core operational voltage under the holding state; Reduce the purpose of stand-by power consumption; Minimizing is to the power consumption requirement of large power, electrically source plate under holding state; Simple novel, with low cost, can be widely used in the control of CPU standby.
Description of drawings
Fig. 1 is the sketch map of one of processing scheme of existing master chip standby;
Fig. 2 is two a sketch map of the processing scheme of existing master chip standby;
Fig. 3 is the schematic block diagram of the STB of embodiment one;
Fig. 4 is the circuit diagram of the STB object lesson of embodiment one.
Embodiment
To combine accompanying drawing and embodiment that technical scheme of the present invention is explained in more detail below.
Need to prove that if do not conflict, each characteristic among the embodiment of the invention and the embodiment can mutually combine, all within protection scope of the present invention.
Embodiment one, a kind of STB, as shown in Figure 3, comprising:
Switch, comprise the master chip of a plurality of unit;
Power supply unit is used for directly to the said master chip unit output voltage relevant with holding state, and through said switch in said master chip and the unit output voltage that has nothing to do of holding state;
Said master chip is used for when preparing standby, closing said switch, and the width of adjustment output pulse; When waken system, open said switch, and recover the width of output pulse;
Change-over circuit is used for changing the voltage that said power supply unit is exported according to the width of said master chip output pulse.
In the present embodiment; Said STB can also comprise peripheral circuit; Said power supply unit also is used for direct to the said peripheral circuit unit output voltage relevant with holding state, and passes through the unit output voltage that said switch has nothing to do with holding state in said peripheral circuit.
In the present embodiment, the said unit relevant with holding state comprises the assurance master chip can wake each unit of control up in the normal response outside, can think to be exactly in the prior art, each unit that when standby, still need be held open in master chip/peripheral circuit; Other unit is and the irrelevant unit of holding state.
In the present embodiment, power supply control comprises two parts content:
The one, the GPIO control of cutting off the power supply is closed said switch by master chip before standby, thereby closes all and the irrelevant power pack of holding state, reduces system power dissipation;
The 2nd, PWM (Pulse width modulation; Pulse width modulation) voltage control is adjusted the pulse duration that PWM exports by master chip before standby, after handling through said change-over circuit; Can reduce the operating voltage of master chip under the holding state, thereby reach the purpose that reduces power consumption.Before response remote controller waken system, master chip is adjusted the PWM output pulse width once more and is become original state, after handling through said change-over circuit, provides the operating voltage of master chip also to revert to original state, the full speed running of recovery system.
The digital signal that present embodiment utilizes master chip to send through simple hardware circuit, is modulated into the equivalent load resistance of power supply feedback point, and the height of control master chip core operational voltage reaches the purpose of controlling power consumption.GPIO and PWM through master chip control Collaborative Control to reduce the power consumption of complete machine under holding state, have effectively remedied the too high problem of power consumption under the independent use GPIO control situation.Because the kernel power consumption of master chip is excessive, through reducing the core operational voltage under the holding state, guarantee the operate as normal of master chip under holding state simultaneously, can effectively reduce the unmanageable problem of master chip stand-by power consumption.
In the present embodiment, the width of master chip adjustment/recovery output pulse can realize through the control impuls width modulation circuit, this pulse width modulation circuit can but be not limited to a chip; The width of adjustment/recovery output pulse also can be considered the frequency of adjustment/recovery output pulse.
In the present embodiment, said master chip will be exported the width of pulse and transfer wide when preparing standby; Transfer wide amplitude (transfer in other words wide after width) according to power supply unit and the used components set of change-over circuit, the width of adjusted pulse should be able to make the voltage of power supply unit output reduce, and enough holding states use down.
In the present embodiment, said power supply unit can but be not limited to a power supply chip and peripheral circuit thereof;
Said change-over circuit can be meant according to the voltage that the width of said master chip output pulse changes said power supply unit output:
Said change-over circuit changes the equivalent resistance of said power supply chip feedback pin according to the width of said master chip output pulse.
In the present embodiment, said change-over circuit specifically can comprise:
First, second, third, fourth resistance and electric capacity;
Wherein, after said first, second, third resistance is connected successively, be connected between the feedback pin of pulse output pin and power supply chip of master chip;
Said the 4th resistance one end is connected on the tie point of first, second resistance other end ground connection;
Said electric capacity one end is connected on the tie point of second, third resistance other end ground connection.
In the object lesson of present embodiment, said master chip comprises the built-in chip PWM1 that can carry out PWM, and said change-over circuit is given in this chip output pulse;
Said power supply unit comprises power supply chip and peripheral circuit thereof, shown in dotted line top among Fig. 4; The dotted line below is depicted as said change-over circuit, comprises first, second, third resistance that is connected on successively between chip PWM1 and the power supply chip pin 4, and parameter is respectively 0R, 20K/1%, 309K/1%; Be connected the tie point of first, second resistance and the 4th resistance between the ground, parameter is 20K/1%, and is connected the tie point of second, third resistance and first electric capacity between the ground, and parameter is 0.1 μ F;
The pin one of said power supply chip, 3,6 ground connection; Pin two connects the first high level VDD, and through second electric capacity (22 μ F) ground connection; Pin 5 is through the 5th resistance (22K) and the 3rd electric capacity (2.2nF) ground connection of series connection; Pin one 0 connects the second high level VDD2 through the 8th resistance (10K); Pin 4 links to each other with pin 7,8,9 with inductance (1.5 μ H/4A) through the 6th resistance (37.4K/1%) for the feedback pin, and through the 7th resistance (87.5K/1%) ground connection, also connects said the 3rd resistance in addition; Wherein, also through the 4th, the 5th electric capacity (the being 22 μ F) ground connection of parallel connection, the voltage on this tie point is the output voltage V DD_CORE_AO of power supply unit to the tie point between the 6th resistance and the inductance.
The digital pulse signal that the left side is sent by master chip in last figure; Analog signal after the right side is for conversion; After inserting the circuit among Fig. 2 among Fig. 1; The part that increases newly (Fig. 2) can equivalence be the resistance of certain numerical value, thereby the resistance that changes the power supply chip feedback point distributes, and reaches the purpose of adjustment output voltage.
Under the normal operating conditions, master chip is A through the width that built-in chip PWM1 sends pulse, and through among the figure behind the change-over circuit, the equivalent resistance of control power supply chip feedback pin is set in normal working voltage A1 with the output voltage V DD_CORE_AO of power supply unit.
The external control unit sends the standby operation signal to master chip.After master chip receives the standby operation signal, related application in difference shutdown signal processing unit, the memory cell; Close each road peripheral hardware power supply through metal-oxide-semiconductor, close master chip and partly supply power, change power supply state, reduce power consumption; In addition, master chip adjustment output pulse frequency, the width adjustment of chip PWM1 being sent pulse is B; Behind change-over circuit among the figure; The equivalent resistance of adjustment power supply chip feedback pin, the output voltage V DD_CORE_AO that reduces power supply unit are to B1, thus reduction master chip kernel supply power voltage; Also just reduced the kernel power consumption, guaranteed also that simultaneously kernel still can operate as normal under holding state;
The external control unit is after the master chip transmission wakes control signal up; Master chip adjustment output pulse frequency returns to A with the width of the pulse on the chip PWM1, behind change-over circuit among the figure; The equivalent resistance of control power supply chip feedback pin; The output voltage V DD_CORE_AO of power supply unit is returned to normal working voltage A1, thereby improve the kernel supply power voltage, recover kernel and supply power to normal working voltage; Master chip is opened each road peripheral hardware power supply through metal-oxide-semiconductor in addition, recovers all power supplies of master chip, recovers all peripheral hardware power supplies, and master chip restarts each application program, the normal operation of recovery system.
Embodiment two, a kind of standby controlling method of STB, and said STB comprises master chip at least, said method comprises:
When preparing standby, stop the unit output voltage that in master chip, has nothing to do with holding state; The width of adjustment master chip output pulse;
When waken system, recover the width of master chip output pulse, and recover in master chip and the irrelevant unit output voltage of holding state;
Change the height of the voltage of unit output relevant with holding state in master chip according to the width of adjusted output pulse.
In the present embodiment, the width of said adjustment master chip output pulse is meant that the width that master chip is exported pulse transfers wide.
In the present embodiment, the width of adjusted pulse can make the voltage of power supply unit output reduce, and enough holding states use down.
Other realizes that details can be referring to embodiment one.
Certainly; The present invention also can have other various embodiments; Under the situation that does not deviate from spirit of the present invention and essence thereof; Those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of claim of the present invention.

Claims (10)

1. STB comprises:
Switch, comprise the master chip of a plurality of unit;
Power supply unit is used for directly to the said master chip unit output voltage relevant with holding state, and through said switch in said master chip and the unit output voltage that has nothing to do of holding state;
It is characterized in that, also comprise:
Change-over circuit is used for changing according to the width of said master chip output pulse the height of the voltage of said power supply unit output;
Said master chip is used for when preparing standby, closing said switch, and the width of adjustment output pulse; When waken system, open said switch, and recover the width of output pulse.
2. STB as claimed in claim 1 is characterized in that, also comprises:
Peripheral circuit;
Said power supply unit also is used for direct to the said peripheral circuit unit output voltage relevant with holding state, and passes through the unit output voltage that said switch has nothing to do with holding state in said peripheral circuit.
3. STB as claimed in claim 1 is characterized in that:
Said master chip will be exported the width of pulse and transfer wide when preparing standby.
4. STB as claimed in claim 3 is characterized in that:
The width of adjusted pulse can make the voltage of power supply unit output reduce, and enough holding states use down.
5. according to any one of claims 1 to 4 STB is characterized in that:
Said power supply unit comprises power supply chip and peripheral circuit thereof;
Said change-over circuit is meant according to the height that the width of said master chip output pulse changes the voltage of said power supply unit output:
Said change-over circuit changes the equivalent resistance of said power supply chip feedback pin according to the width of said master chip output pulse.
6. STB as claimed in claim 5 is characterized in that, said change-over circuit comprises:
First, second, third, fourth resistance and electric capacity;
Wherein, after said first, second, third resistance is connected successively, be connected between the feedback pin of pulse output pin and power supply chip of master chip;
Said the 4th resistance one end is connected on the tie point of first, second resistance other end ground connection;
Said electric capacity one end is connected on the tie point of second, third resistance other end ground connection.
7. STB as claimed in claim 6 is characterized in that:
The parameter of said first, second, third resistance is respectively 0R, 20K/1%, 309K/1%; Be connected the tie point of first, second resistance and the 4th resistance between the ground, parameter is 20K/1%, and is connected the tie point of second, third resistance and first electric capacity between the ground, and parameter is 0.1 μ F
8. the standby controlling method of a STB, said STB comprises master chip at least, said method comprises:
When preparing standby, stop the unit output voltage that in master chip, has nothing to do with holding state; The width of adjustment master chip output pulse;
When waken system, recover the width of master chip output pulse, and recover in master chip and the irrelevant unit output voltage of holding state;
Change the height of the voltage of unit output relevant with holding state in master chip according to the width of adjusted output pulse.
9. method as claimed in claim 8 is characterized in that:
The width of said adjustment master chip output pulse is meant that the width that master chip is exported pulse transfers wide.
10. method as claimed in claim 9 is characterized in that:
The width of adjusted pulse can make the voltage of power supply unit output reduce, and enough holding states use down.
CN201110353776.8A 2011-11-09 2011-11-09 Set-top box and standby control method thereof Active CN102404625B (en)

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CN104052300A (en) * 2013-03-15 2014-09-17 弗莱克斯电子有限责任公司 No load detection and slew rate compensation
CN104202221A (en) * 2014-08-19 2014-12-10 中兴通讯股份有限公司 Method and device for awakening household interconnected device
CN104252840A (en) * 2014-09-11 2014-12-31 天津三星电子有限公司 Driving circuit
CN106571846A (en) * 2016-10-17 2017-04-19 国动物联网技术(上海)有限公司 LoRa data transmission module and data encryption method
CN110769294A (en) * 2019-12-13 2020-02-07 深圳市通久电子有限公司 Set top box suspension protection device and set top box adopting same
CN112804588A (en) * 2020-12-31 2021-05-14 湖南国科微电子股份有限公司 Set top box operation method, device, equipment and medium

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CN201845300U (en) * 2010-11-19 2011-05-25 东莞市金河田实业有限公司 Zero stand-by power consumption computer power
CN201917839U (en) * 2010-12-08 2011-08-03 四川长虹电器股份有限公司 Automatic maintaining voltage adjusting circuit for PDP (Plasma Display Panel) display screen

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CN101419434A (en) * 2007-10-26 2009-04-29 王海 Capacitive switch power supply with low power consumption standby function
CN201726327U (en) * 2010-04-30 2011-01-26 东莞市艾炜特电子有限公司 Power-supply control circuit for large-size liquid crystal display
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104052300A (en) * 2013-03-15 2014-09-17 弗莱克斯电子有限责任公司 No load detection and slew rate compensation
CN104052300B (en) * 2013-03-15 2018-11-13 弗莱克斯电子有限责任公司 Non-loaded detection and Slew Rate compensation
CN104202221A (en) * 2014-08-19 2014-12-10 中兴通讯股份有限公司 Method and device for awakening household interconnected device
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CN104252840A (en) * 2014-09-11 2014-12-31 天津三星电子有限公司 Driving circuit
CN106571846A (en) * 2016-10-17 2017-04-19 国动物联网技术(上海)有限公司 LoRa data transmission module and data encryption method
CN110769294A (en) * 2019-12-13 2020-02-07 深圳市通久电子有限公司 Set top box suspension protection device and set top box adopting same
CN112804588A (en) * 2020-12-31 2021-05-14 湖南国科微电子股份有限公司 Set top box operation method, device, equipment and medium

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