CN102395016A - Control circuit structure for realization of low power standby in set-top box device - Google Patents
Control circuit structure for realization of low power standby in set-top box device Download PDFInfo
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- CN102395016A CN102395016A CN2011103753555A CN201110375355A CN102395016A CN 102395016 A CN102395016 A CN 102395016A CN 2011103753555 A CN2011103753555 A CN 2011103753555A CN 201110375355 A CN201110375355 A CN 201110375355A CN 102395016 A CN102395016 A CN 102395016A
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Abstract
The invention relates to a control circuit structure for realization of low power standby in a set-top box device. The control circuit structure comprises a one-chip microcomputer, a power supply control circuit, an infrared signal connection circuit and a panel connection circuit. The power supply control circuit, the infrared signal connection circuit and the panel connection circuit are connected with the one-chip microcomputer that is connected with a main CPU unit of a set-top box. The main CPU unit is connected with the infrared signal connection circuit. And the power supply control circuit is connected with a system module and a power supply module of the set-top box. According to the invention, by utilizing the control circuit structure for realization of low power standby in a set-top box device, a system module is controlled to be closed by a power supply control circuit when the set-top box device is in a standby mode; and only operation of the control circuit structure is maintained. Therefore, it is realized that the standby power of the whole device is less than 1W, so that the national standard is met as well as energy conservation and environmental protection are realized; moreover, the control circuit structure of the set-top box device has advantages of simple structure, low cost, and wide application range, wherein the control circuit structure is used for realizing low power standby.
Description
Technical field
The present invention relates to the circuit structure technical field, particularly the readiness control circuit technical field of structures specifically is meant the control circuit structure that realizes low power standby in a kind of set-top box device.
Background technology
Along with constantly popularizing of digital television techniques, set-top box device can provide user's HDTV program and other service content, has greatly expanded the entertainment life of TV user, receives consumer's welcome, becomes a kind of very common home appliance.When the user does not use; The general long-time holding state that is in of STB, but the standby power of set-top box device in the market is higher, and power consumption is bigger during the standby; Therefore do not reach energy conservation and environment protection, more can't reach about the request of national standard of set-top box standby power less than 1W.
In view of newly-designed product and the product that is about to shipment at present can not satisfy the requirement of standby less than 1W.The standby key control motherboard power supply of the utility model device through remote controller realized the complete machine standby less than 1W, and through remote controller to treat that switch changes awake, realize energy-conservation and request of national standard.
Summary of the invention
The objective of the invention is to have overcome above-mentioned shortcoming of the prior art; A kind of standby power that can effectively hang down STB is provided, makes it less than 1W, thereby make the standby power of STB satisfy national standard; Energy-conserving and environment-protective; And simple in structure, with low cost, range of application realizes the control circuit structure of low power standby comparatively widely in the set-top box device.
In order to realize above-mentioned purpose, realize in the set-top box device of the present invention that the control circuit structure of low power standby has following formation:
Set-top box device comprises power module and system module, and described system module has main CPU unit, and described power module is connected in described main CPU unit.The control circuit structure that realizes low power standby in this set-top box device comprises single-chip microcomputer, power control circuit, infrared signal connecting circuit and panel connecting circuit; Described power control circuit, infrared signal connecting circuit and panel connecting circuit all are connected in described single-chip microcomputer; Described single-chip microcomputer also connects described main CPU unit; Described main CPU unit also connects described infrared signal connecting circuit, and described power control circuit also is connected between described system module and the described power module.
Realize in the control circuit structure of low power standby in this set-top box device; Described power control circuit comprises first triode and metal-oxide-semiconductor; The emitter of described first triode is communicated with the grid of described metal-oxide-semiconductor through a dropping resistor; The enable signal that the base stage of described first triode connects described single-chip microcomputer sends pin; The grounded collector of described first triode, the source electrode of described metal-oxide-semiconductor connects the output of described power module, and the drain electrode of described metal-oxide-semiconductor connects the main CPU unit of described system module.
Realize in the control circuit structure of low power standby in this set-top box device; Described system module also comprises DC-DC control circuit and low-dropout linear voltage-regulating circuit, and described power module is connected described main CPU unit through described DC-DC control circuit in proper order with low-dropout linear voltage-regulating circuit.
Realize in the control circuit structure of low power standby in this set-top box device; Described power control circuit also comprises the enable signal output, and described enable signal output connects the enable signal input of described DC-DC control circuit and low-dropout linear voltage-regulating circuit respectively.
Realize in the control circuit structure of low power standby in this set-top box device; Described infrared signal connecting circuit comprises infrared signal receiver and booster circuit; The input of described booster circuit connects the described infrared signal receiver of drawing together, and the output of described booster circuit connects described single-chip microcomputer and main CPU unit respectively.
Realize in the control circuit structure of low power standby in this set-top box device; Described booster circuit comprises second triode, the 3rd triode and the 4th triode; Described second transistor base connects described infrared signal receiver; The emitter of described second triode connects the base stage of described the 3rd triode and the 4th triode respectively; The emitter of described the 3rd triode and the 4th triode is connected described single-chip microcomputer and main CPU unit respectively, the equal ground connection of collector electrode of described second triode, the 3rd triode and the 4th triode.
Realize in the control circuit structure of low power standby in this set-top box device; Described panel connecting circuit comprises front panel chip for driving, charactron, light-emitting diode and on & off switch; Described front panel chip for driving connects described charactron, light-emitting diode and on & off switch respectively, and described front panel chip for driving also connects described single-chip microcomputer.
Adopted the control circuit structure that realizes low power standby in the set-top box device of this invention; Because it comprises single-chip microcomputer, power control circuit, infrared signal connecting circuit and panel connecting circuit; Described power control circuit, infrared signal connecting circuit and panel connecting circuit all are connected in described single-chip microcomputer; Described single-chip microcomputer also connects described main CPU unit; Described main CPU unit also connects described infrared signal connecting circuit, and described power control circuit also is connected between described system module and the described power module.Thereby when the set-top box device standby, can close, only keep the operation of this control circuit structure through power control circuit control system module; Realize that the complete machine standby power is lower than 1W; Satisfy national standard, energy-conserving and environment-protective, and realize control circuit structure simple in structure of low power standby in the set-top box device of the present invention; With low cost, range of application is comparatively extensive.
Description of drawings
Fig. 1 is a structural representation of realizing the control circuit structure of low power standby in the set-top box device of the present invention.
Fig. 2 is a wiring schematic diagram of realizing single-chip microcomputer 1-10 pin in the control circuit structure of low power standby in the set-top box device of the present invention.
Fig. 3 is a wiring schematic diagram of realizing single-chip microcomputer 11-20 pin in the control circuit structure of low power standby in the set-top box device of the present invention.
Fig. 4 is a circuit diagram of realizing infrared signal connecting circuit in the control circuit structure of low power standby in the set-top box device of the present invention.
Fig. 5 is a circuit diagram of realizing power control circuit in the control circuit structure of low power standby in the set-top box device of the present invention.
Fig. 6 is a circuit diagram of realizing panel connecting circuit in the control circuit structure of low power standby in the set-top box device of the present invention.
Fig. 7 is a circuit diagram of realizing infrared receiving terminal in the control circuit structure of low power standby in the set-top box device of the present invention.
Embodiment
In order more to be expressly understood technology contents of the present invention, the special following examples of lifting specify.
See also shown in Figure 1ly, be to realize in the set-top box device of the present invention the structural representation of the control circuit structure of low power standby.
In one embodiment; Set-top box device comprises power module and system module; Described system module has main CPU unit; Described power module is connected in described main CPU unit; The control circuit structure that realizes low power standby in this set-top box device comprises single-chip microcomputer, power control circuit, infrared signal connecting circuit and panel connecting circuit, and described power control circuit, infrared signal connecting circuit and panel connecting circuit all are connected in described single-chip microcomputer, and described single-chip microcomputer also connects described main CPU unit; Described main CPU unit also connects described infrared signal connecting circuit, and described power control circuit also is connected between described system module and the described power module.
In a kind of more preferably execution mode; Described power control circuit comprises first triode and metal-oxide-semiconductor; The emitter of described first triode is communicated with the grid of described metal-oxide-semiconductor through a dropping resistor; The enable signal that the base stage of described first triode connects described single-chip microcomputer sends pin; The grounded collector of described first triode, the source electrode of described metal-oxide-semiconductor connects the output of described power module, and the drain electrode of described metal-oxide-semiconductor connects the main CPU unit of described system module.
In further preferred embodiment; Described system module also comprises DC-DC control circuit and low-dropout linear voltage-regulating circuit, and described power module is connected described main CPU unit through described DC-DC control circuit in proper order with low-dropout linear voltage-regulating circuit.Described power control circuit also comprises the enable signal output, and described enable signal output connects the enable signal input of described DC-DC control circuit and low-dropout linear voltage-regulating circuit respectively.
At another kind more preferably in the execution mode; Described infrared signal connecting circuit comprises infrared signal receiver and booster circuit; The input of described booster circuit connects the described infrared signal receiver of drawing together, and the output of described booster circuit connects described single-chip microcomputer and main CPU unit respectively.
In further preferred embodiment; Described booster circuit comprises second triode, the 3rd triode and the 4th triode; Described second transistor base connects described infrared signal receiver; The emitter of described second triode connects the base stage of described the 3rd triode and the 4th triode respectively; The emitter of described the 3rd triode and the 4th triode is connected described single-chip microcomputer and main CPU unit respectively, the equal ground connection of collector electrode of described second triode, the 3rd triode and the 4th triode.
In preferred execution mode; Described panel connecting circuit comprises front panel chip for driving, charactron, light-emitting diode and on & off switch; Described front panel chip for driving connects described charactron, light-emitting diode and on & off switch respectively, and described front panel chip for driving also connects described single-chip microcomputer.
In practical application, realize in this set-top box device of the present invention that the control circuit structure of low power standby comprises single chip machine controlling circuit, infrared signal connecting circuit, power control circuit and panel connecting circuit.
Wherein, single chip machine controlling circuit like Fig. 2 and shown in Figure 3, adopts the STM8S103F type MCU chip of ST.Wherein, J15 can be provided at sequence of threads and insert and to write, and is convenient to debugging and volume production.PIN10 and PIN19-20 pin are used to control the output of DC-DC, LDO, metal-oxide-semiconductor.Normal boot-strap is output as high level, and each road power supplys of EN pin output such as control DC-DC, LDO are supplied power to system.The PIN14 pin connects infrared remote control through circuit and receives head, is used to receive control of remote controller.Behind the code value that receives standby, MCU puts low level with PIN10 and PIN19-20 pin, turn-offs system power supply, only MCU and the panel demonstration work of complete machine this moment, and Overall Power Consumption is less than 1W.The PIN15-17 pin is connected the panel display chip together with host CPU, is used for coming demonstration time and standby indicating lamp through software after the standby.The PIN11-12 pin is the I2C pin, is used for communicating by letter with master chip, and the realization time such as obtains, promptly wakes up at function.
The infrared signal connecting circuit, as shown in Figure 4, this circuit is realized the remote signal that receives is divided into two-way, gives master chip and MCU respectively.Utilize the inverter functionality of triode saturation condition, with twice anti-phase of signal, the smooth realization 5V that boosts separately satisfies the transfer function of signal like clockwork.
Power control circuit, as shown in Figure 5, after single-chip microcomputer receives the code value of standby, the control corresponding pin is put low level, realize not output voltage such as DC-DC, LDO, metal-oxide-semiconductor.DC-DC, LDO are owing to there is special EN pin can realize the shutoff and the opening function of voltage smoothly.And the control principle of metal-oxide-semiconductor is: normal boot-strap EN signal is a high level, realizes the BE conducting because the base stage B of triode Q7 is higher than emitter E, with the direct ground connection of collector electrode C pin.The voltage of the grid G pin of PMOS pipe is dragged down by dropping resistor R200, realizes that the voltage of grid G is lower than source S, thus the SG conducting, and power supply is used for system's power supply by source S to drain D.Receive when single-chip microcomputer behind the code value of standby the anti-phase of corresponding PIN pin, the EN signal is put low level.The BE of triode Q7 by, the collector electrode C of triode Q7 is put sky, and the grid G of PMOS pipe is suspended from 12V, SG by, export with shutoff voltage.
The panel connecting circuit, as shown in Figure 6, form by front panel chip for driving CT1668,4 charactrons, infrared receiving terminal, light-emitting diode and touch-switchs etc.Single-chip microcomputer is realized the demonstration of charactron and LED through SPI control CT1668.The infrared receiving terminal circuit is as shown in Figure 7, and the remote signal that receives is passed to single-chip microcomputer.
Adopted the control circuit structure that realizes low power standby in the set-top box device of this invention; Because it comprises single-chip microcomputer, power control circuit, infrared signal connecting circuit and panel connecting circuit; Described power control circuit, infrared signal connecting circuit and panel connecting circuit all are connected in described single-chip microcomputer; Described single-chip microcomputer also connects described main CPU unit; Described main CPU unit also connects described infrared signal connecting circuit, and described power control circuit also is connected between described system module and the described power module.Thereby when the set-top box device standby, can close, only keep the operation of this control circuit structure through power control circuit control system module; Realize that the complete machine standby power is lower than 1W; Satisfy national standard, energy-conserving and environment-protective, and realize control circuit structure simple in structure of low power standby in the set-top box device of the present invention; With low cost, range of application is comparatively extensive.
In this specification, the present invention is described with reference to its certain embodiments.But, still can make various modifications and conversion obviously and not deviate from the spirit and scope of the present invention.Therefore, specification and accompanying drawing are regarded in an illustrative, rather than a restrictive.
Claims (7)
1. realize the control circuit structure of low power standby in the set-top box device; Described set-top box device comprises power module and system module; Described system module has main CPU unit; Described power module is connected in described main CPU unit, it is characterized in that, described control circuit structure comprises single-chip microcomputer, power control circuit, infrared signal connecting circuit and panel connecting circuit; Described power control circuit, infrared signal connecting circuit and panel connecting circuit all are connected in described single-chip microcomputer; Described single-chip microcomputer also connects described main CPU unit, and described main CPU unit also connects described infrared signal connecting circuit, and described power control circuit also is connected between described system module and the described power module.
2. realize the control circuit structure of low power standby in the set-top box device according to claim 1; It is characterized in that; Described power control circuit comprises first triode and metal-oxide-semiconductor; The emitter of described first triode is communicated with the grid of described metal-oxide-semiconductor through a dropping resistor, and the enable signal that the base stage of described first triode connects described single-chip microcomputer sends pin, the grounded collector of described first triode; The source electrode of described metal-oxide-semiconductor connects the output of described power module, and the drain electrode of described metal-oxide-semiconductor connects the main CPU unit of described system module.
3. realize the control circuit structure of low power standby in the set-top box device according to claim 2; It is characterized in that; Described system module also comprises DC-DC control circuit and low-dropout linear voltage-regulating circuit, and described power module is connected described main CPU unit through described DC-DC control circuit in proper order with low-dropout linear voltage-regulating circuit.
4. realize the control circuit structure of low power standby in the set-top box device according to claim 3; It is characterized in that; Described power control circuit also comprises the enable signal output, and described enable signal output connects the enable signal input of described DC-DC control circuit and low-dropout linear voltage-regulating circuit respectively.
5. according to the control circuit structure that realizes low power standby in each described set-top box device in the claim 1 to 4; It is characterized in that; Described infrared signal connecting circuit comprises infrared signal receiver and booster circuit; The input of described booster circuit connects the described infrared signal receiver of drawing together, and the output of described booster circuit connects described single-chip microcomputer and main CPU unit respectively.
6. realize the control circuit structure of low power standby in the set-top box device according to claim 5; It is characterized in that; Described booster circuit comprises second triode, the 3rd triode and the 4th triode; Described second transistor base connects described infrared signal receiver; The emitter of described second triode connects the base stage of described the 3rd triode and the 4th triode respectively, and the emitter of described the 3rd triode and the 4th triode is connected described single-chip microcomputer and main CPU unit respectively, the equal ground connection of collector electrode of described second triode, the 3rd triode and the 4th triode.
7. according to the control circuit structure that realizes low power standby in each described set-top box device in the claim 1 to 4; It is characterized in that; Described panel connecting circuit comprises front panel chip for driving, charactron, light-emitting diode and on & off switch; Described front panel chip for driving connects described charactron, light-emitting diode and on & off switch respectively, and described front panel chip for driving also connects described single-chip microcomputer.
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| CN2011103753555A CN102395016A (en) | 2011-11-23 | 2011-11-23 | Control circuit structure for realization of low power standby in set-top box device |
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| CN2011103753555A CN102395016A (en) | 2011-11-23 | 2011-11-23 | Control circuit structure for realization of low power standby in set-top box device |
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| CN111358355A (en) * | 2018-12-26 | 2020-07-03 | 北京奇虎科技有限公司 | Standby control circuit and sweeping robot |
| CN111857322A (en) * | 2020-06-19 | 2020-10-30 | 海信（山东）冰箱有限公司 | Method and device for reducing standby power consumption of washing machine, washing machine and related equipment |
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Application publication date: 20120328 |