CN103313003B - Readiness control circuit and television set - Google Patents
Readiness control circuit and television set Download PDFInfo
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- CN103313003B CN103313003B CN201310167931.6A CN201310167931A CN103313003B CN 103313003 B CN103313003 B CN 103313003B CN 201310167931 A CN201310167931 A CN 201310167931A CN 103313003 B CN103313003 B CN 103313003B
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Abstract
The present invention relates to field of power supplies, it is provided that a kind of readiness control circuit and television set.A kind of readiness control circuit, including the EMI filtration module being sequentially connected with, rectification filtering module, transformer module, output rectification filter module, the input termination power of EMI filtration module, the output terminating load of output rectification filter module, PWM control module；Also include: voltage stabilizing feedback module, energy-storage module, voltage comparison module, standby signal input module, standby control module.Readiness control circuit provided by the present invention, when standby, PWM control module is in discontinuous operation state, can automatic batch-type be energy-storage module momentary charge, is load supplying afterwards for a long time by energy-storage module, and its circuit is simple, low cost；Relative to the normally open of the PWM control module of prior art, its power consumption is lower, can the most only maintain the power consumption of a display lamp.
Description
Technical field
The present invention relates to appliance circuit field, particularly relate to intermittent power supply low-power consumption standby control circuit and
Television set.
Background technology
Along with the development of society, awareness of saving energy is increasingly paid attention to by extensive consumer.And television set, computer,
Air-conditioning, all there is higher stand-by power consumption, according to investigations, every year because of electricity in the power supply of the multiple electric equipment such as refrigerator
The electric energy electricity charge that the stand-by power consumption of device equipment is lost have nearly hundred million yuan.
And the electric appliance standby circuit of existing " discontinuous operation pattern " uses relay, CPU controls, super electricity
The circuit modules such as appearance, relatively costly, circuit is complicated, and safety is wayward, and relay switch is short for service life
Etc. shortcoming；Additionally, use " Zero-power-consumption standby pattern " although appliance circuit standby power power consumption drop to connect
Nearly zero, but mix complete machine, it is impossible to make the proper device operation such as standby indicating lamp, infrared remote receiver.
In sum, there is circuit complexity in the stand-by circuit of prior art, safety is wayward, cost is high,
Or the shortcoming such as standby indicating lamp, infrared remote receiver even load cisco unity malfunction.
Summary of the invention
It is an object of the invention to provide a kind of readiness control circuit, it is intended to solve the stand-by circuit of prior art
There is circuit complexity, safety is wayward, cost is high, or standby indicating lamp, infrared remote receiver even load are not
Can the normal shortcoming such as work.
To this end, the present invention is by the following technical solutions:
A kind of readiness control circuit, including the EMI filtration module being sequentially connected with, rectification filtering module, transformation
Device module, output rectification filter module, the input termination power of described EMI filtration module, described output is whole
The output terminating load of stream filtration module；Also include the PWM control controlling the duty of described transformer module
Molding block, the starting up of described PWM control module terminates the outfan of described EMI filtration module, opens
OFF signal output the termination controlled end of described transformer module, power input connect the of described transformer module
Two power output ends；
Described readiness control circuit also includes:
The galvanic Voltage Feedback described output rectification filter module exported controls mould to described PWM
Block and the voltage stabilizing feedback module of output voltage regulation signal, the input of described voltage stabilizing feedback module terminates described output
The outfan of rectification filtering module, feedback output end connect the feedback input end of described PWM control module；
For the energy-storage module of described load supplying, the input of described energy-storage module terminates described output rectification filter
The outfan of module, output terminating load；
The supply voltage and the described voltage regulation signal that described energy-storage module are powered described load compare
Relatively, and according to comparative result output control signal voltage comparison module, the first of described voltage comparison module
The input termination voltage regulation signal outfan of described voltage stabilizing feedback module, the second input terminate described energy-storage module
Outfan；
The standby signal input module of output standby signal；
The described control signal exported according to described voltage comparison module controls the work of described PWM control module
Make the standby control module of state, the input of described standby control module all with described voltage comparison module and
The outfan of described standby signal input module connects, the standby signal of the output described PWM control module of termination
Control end.
Present invention also offers a kind of television set including above-described readiness control circuit.
The readiness control circuit that the present invention provides, when entering holding state, is load supplying by energy-storage module.
Now, when voltage comparison module detects the supply voltage of energy-storage module less than the lower limit set, output
Signal controls PWM control module and is operated, thus is charged for energy-storage module；Work as voltage comparison module
When the supply voltage of energy-storage module being detected higher than the higher limit set, output signal controls PWM control module
Quit work, be now load supplying by energy-storage module.Therefore, readiness control circuit provided by the present invention,
When standby, PWM control module is in discontinuous operation state, can automatic batch-type be to fill energy-storage module moment
Electricity, is load supplying afterwards for a long time by energy-storage module, and its circuit is simple, low cost；Relative to existing
The normally open of the PWM control module of technology, its power consumption is lower, can the most only maintain the merit of a display lamp
Consumption.
Accompanying drawing explanation
The schematic block circuit diagram of the readiness control circuit that Fig. 1 provides for the embodiment of the present invention；
The circuit theory schematic diagram of the readiness control circuit that Fig. 2 provides for the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with drawings and the specific embodiments, the present invention is described in further detail.
With reference to Fig. 1, the schematic block circuit diagram of the readiness control circuit that the embodiment of the present invention provides.
A kind of readiness control circuit, including the EMI filtration module 2 being sequentially connected with, rectification filtering module 3, becomes
Depressor module 4, output rectification filter module 5, the input termination power 1 of EMI filtration module 2, export whole
The output terminating load 6 of stream filtration module 5；Also include the PWM controlling the duty of transformer module 4
Control module 7, the starting up of PWM control module 7 terminates the outfan of EMI filtration module 2, switch
Signal output part connects the controlled end of transformer module 4, power input connects the second source of transformer module 4
Outfan；
Readiness control circuit also includes: galvanic Voltage Feedback output rectification filter module 5 exported
To PWM control module 7 and the voltage stabilizing feedback module 8 of output voltage regulation signal, voltage stabilizing feedback module 8 defeated
Enter to terminate the outfan of output rectification filter module 5, that feedback output end connects the feedback of PWM control module 7 is defeated
Enter end；For the energy-storage module 9 of load 6 power supply, the input termination output rectification filter module 5 of energy-storage module 9
Outfan, output terminating load 6；The supply voltage that load 6 is powered by energy-storage module 9 and voltage stabilizing
Signal compares, and according to the voltage comparison module 10 of comparative result output control signal, voltage ratio relatively mould
The first input end of block 10 connects the voltage regulation signal outfan of voltage stabilizing feedback module 8, the second input termination energy storage mould
The outfan of block 9；The standby signal input module 11 of output standby signal；Defeated according to voltage comparison module 10
The control signal gone out controls the standby control module 12 of the duty of PWM control module 7, Opportunity awaiting control for linear
The input of module 12 all outfans with voltage comparison module 10 and standby signal input module 12 are connected,
The standby signal of output termination PWM control module 7 controls end.With reference to Fig. 2, the embodiment of the present invention provides
The circuit theory schematic diagram of readiness control circuit.
Voltage stabilizing feedback module 8 includes optocoupler IC7, amplifier U1A, stabilivolt ZD1, resistance R74, resistance
R75, resistance R77, resistance R87, resistance R88, resistance R90 and resistance R91；
The outfan of output rectification filter module 5 passes sequentially through resistance R74, resistance R75, resistance R77 connect
Ground, the outfan of output rectification filter module 5 also passes sequentially through resistance R91, resistance R88 ground connection；Amplifier
The outfan of U1A passes sequentially through resistance R87 and resistance R90 and connects the outfan of output rectification filter module 5,
The anti-phase input terminating resistor R91 of amplifier U1A and the public connecting end of resistance R88, amplifier U1A same
Phase input connecting resistance R74 and the public connecting end of resistance R75；The negative electrode connecting resistance R74 of stabilivolt ZD1
Public connecting end, plus earth with resistance R75；The 1 foot connecting resistance R87 and resistance R90 of optocoupler IC7
Public connecting end, 2 feet connect the outfan of amplifier U1A, 3 foot ground connection, 4 feet as voltage stabilizing feedback module 8
Feedback output end；The public connecting end of resistance R91 and resistance R74 is as the input of voltage stabilizing feedback module 8
End；The public connecting end of resistance R75 and resistance R77 is as the output end of pressure-stabilizing of voltage stabilizing feedback module 8.
Energy-storage module 9 includes the storage capacitor C63 being connected between output rectification filter module 5 and ground, energy storage
The minus earth of electric capacity C63, positive pole are simultaneously as the input of energy-storage module 9 and outfan.
Voltage comparison module 10 includes resistance R73, resistance R78, resistance R84, resistance R89, amplifier U2B
And diode D16；
First end of resistance R89 passes through resistance R84 as the second input, second end of voltage comparison module 1
Ground connection；Second end of anti-phase input terminating resistor R89 of amplifier U2B, in-phase input end are as voltage ratio relatively
The first input end of module 1；The negative electrode of diode D16 is as the outfan of voltage comparison module 1, anode
The outfan of amplifier U2B is connect by resistance R78；Resistance R73 be connected to amplifier U2B outfan and
Between in-phase input end.
The anode of the output terminating diode D17 of standby signal input module 11, the negative electrode of diode D17
Connect the input of standby control module 12.
Readiness control circuit also includes detecting the power failure detection circuit 13 of power supply 1 whether power-off, outage detection electricity
The outfan of input termination EMI filtration module 2 on road 13, the power-off of output termination PWM control module 7
Test side.
Power failure detection circuit 13 includes resistance R23 and resistance R31；
The outfan of EMI filtration module 2 passes sequentially through resistance 23, resistance R31 ground connection, resistance 23 and electricity
The public connecting end of resistance R31 is as the outfan of power failure detection circuit 13.
PWM control module 7 includes PWM controller IC8 and optocoupler IC5, the type of PWM controller IC8
Number it is MIP006；
The LS pin of PWM controller IC8 is managed as outage detection end, the OUT of PWM control module 7
Foot as the switching signal outfan of PWM control module 7, VCC pin as PWM control module 7
Power input, VIN pin is as starting up's end of PWM control module 7, OFF pin conduct
The standby signal of PWM control module 7 controls end, OFF pin connects Opportunity awaiting control for linear mould by described optocoupler IC5
The outfan of block 12, FB pin are as the feedback input end of PWM control module 7.
In the embodiment of the present invention, amplifier U1A, amplifier U2B, stabilivolt ZD1 be model be AP4310
Accurate voltage stabilizing adjusts the integrated amplifier of chip internal and stabilivolt.
Below in conjunction with Fig. 2, the operation principle of the readiness control circuit that the embodiment of the present invention provides is made furtherly
Bright.
The pressure sampling circuit that anti-phase input terminating resistor R91 and R88 of amplifier U1A is constituted, homophase inputs
Termination pull-up resistor R74 provides reference voltage for its input；Voltage stabilizing feedback module 8 is by output rectification filter mould
After the voltage of block 5 is sampled by resistance R91 and R88 dividing potential drop, the most defeated after inputing to amplifier U1A judged result
Go out to feed back to PWM control module 7, adjust the dutycycle of the pwm signal of PWM control module 7 output
Make the voltage stabilization that transformer module 4 exports.
The voltage of the negative electrode of stabilivolt ZD1 is by inputting to amplifier after resistance R75 and resistance R77 dividing potential drop sample
The in-phase input end of U2B, as the reference voltage of 5 feet of U1B.The cathode voltage of storage capacitor C63 leads to
After crossing resistance R89 and resistance R84 composition pressure sampling circuit, the sampling voltage input of this pressure sampling circuit
Inverting input to amplifier U2B.Resistance R73 is as the feedback resistance of amplifier U2B.Amplifier U2B
The control signal of outfan output passes sequentially through resistance R78, diode D16 connects the defeated of standby control module 12
Enter end.The control signal of amplifier U2B output and the signal co-controlling of standby signal input module 11 output are treated
Machine control module 12.The effect of diode D16 and diode D17 is to ensure that the control that amplifier U2B exports
The signal of signal and standby signal input module 11 output is independent of each other.Standby control module 12 passes through optocoupler
IC5 connect PWM control module 7 standby signal control end, control PWM control module 7 work with stop
Only.
When standby signal input module 11 output low level, now readiness control circuit is entered by open state
Holding state, now storage capacitor C63 supply voltage is sufficient, and the output of amplifier U2B is also low level, now
Act on standby control module 12 for low level and then make PWM control module 7 quit work.Now by storing up
Can electric capacity C63 be standby indicating lamp, infrared remote receiver even load 6 be powered.
After storage capacitor C63 power consumption makes supply voltage be less than the lower limit of setting, amplifier U2B will detect
The supply voltage of storage capacitor C63, less than exporting high level after the lower limit set, is now high level effect
In standby control module 12 and then make PWM control module 7 be operated, charge for storage capacitor C63.
When storage capacitor C63 supply voltage is higher than the higher limit set, amplifier U2B will detect storage capacitor
The supply voltage of C63 is higher than the higher limit set, and amplifier U2B is output as low level, now makees for low level
For standby control module 12 and then make PWM control module 7 quit work.Now by storage capacitor C63
For standby indicating lamp, infrared remote receiver even load 6 is powered.So, this readiness control circuit carries out work repeatedly
Make.
Therefore, the readiness control circuit that the embodiment of the present invention is provided, PWM control module 7 when standby
It is in discontinuous operation state, can automatic batch-type be energy-storage module 9 momentary charge, afterwards by energy-storage module 9
For a long time for load 6 power supply, its circuit is simple, low cost；Mould is controlled relative to the PWM of prior art
The normally open of block, its power consumption is lower, can the most only maintain the power consumption of a display lamp.(PWM controls mould
The power consumption of block normally open is about 200mW, and the batch (-type) of the readiness control circuit that the embodiment of the present invention provides
The PWM control module of work, its power consumption is about 20mW.)
Additionally, in the embodiment of the present invention, power supply 1 is led to by its live wire after electric capacity CX2 and common mode inductance LF3
Cross diode D19, zero line connects together by after diode D18, then is connected to PWM by resistance R38
Starting up's end of control module 7, power firestreak or zero line pass through divider resistance R23 and resistance R31 dividing potential drop
After sampling, dividing potential drop sampled signal is transmitted to PWM control module 7 outage detection end.After pulling out attaching plug
I.e. after power supply 1 power-off, the outage detection end of PWM control module 7 is low level, then EMI filtering
The electric capacity CX2 of module 2 is by diode D19, diode D18, again by resistance R38 transmission to PWM
Starting up's end of control module 7, now electric capacity CX2 is discharged by PWM control module 7.This
Sample both can save the idling consumption of the resistance that prior art is electric capacity CX2 electric discharge, in turn simplify circuit, saves
Cost.
The embodiment of the present invention also provides for a kind of television set including above-described readiness control circuit.
These are only the preferred embodiment of the present invention, be not limited to the present invention, all principles in the present invention it
Interior made any amendment, equivalent and improvement etc., within should be included in the scope of protection of the invention.
Claims (7)
1. a readiness control circuit, including the EMI filtration module (2) being sequentially connected with, rectifying and wave-filtering mould
Block (3), transformer module (4), output rectification filter module (5), described EMI filtration module (2)
Input termination power (1), the output terminating load (6) of described output rectification filter module (5)；Also
Including the PWM control module (7) of the duty controlling described transformer module (4), described PWM
It is defeated that the starting up of control module (7) terminates the outfan of described EMI filtration module (2), switching signal
Go out to terminate the controlled end of described transformer module (4), power input connects described transformer module (4)
Second source outfan；It is characterized in that,
Described readiness control circuit also includes:
The galvanic Voltage Feedback described output rectification filter module (5) exported is controlled to described PWM
Molding block (7) and the voltage stabilizing feedback module (8) of output voltage regulation signal, described voltage stabilizing feedback module (8)
Input the termination outfan of described output rectification filter module (5), feedback output end connect described PWM control
The feedback input end of molding block (7)；
The energy-storage module (9) powered for described load (6), the input of described energy-storage module (9) terminates institute
State the outfan of output rectification filter module (5), output terminating load (6)；
The supply voltage that described load (6) is powered by described energy-storage module (9) and described voltage stabilizing letter
Number compare, and according to the voltage comparison module (10) of comparative result output control signal, described voltage
The first input end of comparison module (10) connect the voltage regulation signal outfan of described voltage stabilizing feedback module (8),
Two inputs terminate the outfan of described energy-storage module (9)；
The standby signal input module (11) of output standby signal；
The described control signal that standby signal input module exports according to described voltage comparison module (10) controls
The standby control module (12) of the duty of described PWM control module (7), described Opportunity awaiting control for linear mould
The input of block (12) all with described voltage comparison module (10) and described standby signal input module (12)
Outfan connect, output terminate described PWM control module (7) standby signal control end；
Described voltage stabilizing feedback module (8) include optocoupler IC7, amplifier U1A, stabilivolt ZD1, resistance R74,
Resistance R75, resistance R77, resistance R87, resistance R88, resistance R90 and resistance R91；
The outfan of described output rectification filter module (5) pass sequentially through described resistance R74, described resistance R75,
Described resistance R77 ground connection, the outfan of described output rectification filter module (5) also passes sequentially through described resistance
R91, described resistance R88 ground connection；
The outfan of described amplifier U1A passes sequentially through described resistance R87 and described resistance R90 and connects described output
The outfan of rectification filtering module (5), the anti-phase input of described amplifier U1A terminate described resistance R91 and
The public connecting end of described resistance R88, the in-phase input end of described amplifier U1A meets described resistance R74 and institute
State the public connecting end of resistance R75；
The negative electrode of described stabilivolt ZD1 connects described resistance R74 and the public connecting end of described resistance R75, sun
Pole ground connection；
1 foot of described optocoupler IC7 connects described resistance R87 and the public connecting end of described resistance R90,2 feet
Connect the outfan of described amplifier U1A, 3 foot ground connection, 4 feet as the feedback of described voltage stabilizing feedback module (8)
Outfan；
The public connecting end of described resistance R91 and described resistance R74 is as described voltage stabilizing feedback module (8)
Input；
The public connecting end of described resistance R75 and described resistance R77 is as described voltage stabilizing feedback module (8)
Output end of pressure-stabilizing；
Described PWM control module (7) includes PWM controller IC8 and optocoupler IC5, and described PWM is controlled
The model of device IC8 processed is MIP006；
The LS pin of described PWM controller IC8 is examined as the power-off of described PWM control module (7)
Survey end, OUT pin as the switching signal outfan of described PWM control module (7), VCC pin
Power input, VIN pin as described PWM control module (7) control mould as described PWM
Starting up's end of block (7), OFF pin are as the standby signal control of described PWM control module (7)
End processed, OFF pin connect the outfan of described standby control module (12) by described optocoupler IC5, FB manages
Foot is as the feedback input end of described PWM control module (7).
2. readiness control circuit as claimed in claim 1, it is characterised in that described energy-storage module (9) wraps
Include the storage capacitor C63 being connected between described output rectification filter module (5) and ground, described energy electric capacity C63
Minus earth, positive pole is simultaneously as the input of described energy-storage module (9) and outfan.
3. readiness control circuit as claimed in claim 1, it is characterised in that described voltage comparison module (10)
Including resistance R73, resistance R78, resistance R84, resistance R89, amplifier U2B and diode D16；
First end of described resistance R89 is as the second input of described voltage comparison module (1), the second end
By described resistance R84 ground connection；
Anti-phase input termination second end of described resistance R89, the in-phase input end of described amplifier U2B are as institute
State the first input end of voltage comparison module (1)；
The negative electrode of described diode D16 passes through institute as outfan, the anode of described voltage comparison module (1)
State resistance R78 and connect the outfan of described amplifier U2B；
Described resistance R73 is connected between outfan and the in-phase input end of described amplifier U2B.
4. readiness control circuit as claimed in claim 1, it is characterised in that described standby signal input mould
The anode of the output terminating diode D17 of block (11), the negative electrode of diode D17 connects described Opportunity awaiting control for linear mould
The input of block (12).
5. readiness control circuit as claimed in claim 1, it is characterised in that described readiness control circuit is also
Including detecting the power failure detection circuit (13) of described power supply (1) whether power-off, described power failure detection circuit (13)
Input terminate described EMI filtration module (2) outfan, output terminate described PWM control module (7)
Outage detection end.
6. readiness control circuit as claimed in claim 5, it is characterised in that described power failure detection circuit (13)
Including resistance R23 and resistance R31；
The outfan of described EMI filtration module (2) passes sequentially through described resistance 23, described resistance R31 connects
Ground, the public connecting end of described resistance 23 and described resistance R31 is as described power failure detection circuit (13)
Outfan.
7. a television set, it is characterised in that include the Opportunity awaiting control for linear electricity described in any one of claim 1-6
Road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310167931.6A CN103313003B (en) | 2013-05-09 | 2013-05-09 | Readiness control circuit and television set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310167931.6A CN103313003B (en) | 2013-05-09 | 2013-05-09 | Readiness control circuit and television set |
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| Publication Number | Publication Date |
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| CN103313003A CN103313003A (en) | 2013-09-18 |
| CN103313003B true CN103313003B (en) | 2016-10-12 |
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| CN201310167931.6A Active CN103313003B (en) | 2013-05-09 | 2013-05-09 | Readiness control circuit and television set |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104811026A (en) * | 2015-05-27 | 2015-07-29 | 成都德麦科技有限公司 | Switch power supply |
| CN105119490B (en) * | 2015-07-27 | 2018-01-12 | 深圳创维－Rgb电子有限公司 | Voltage x current dual output control circuit and constant voltage constant current power, display device |
| CN107134918A (en) * | 2016-02-29 | 2017-09-05 | 上海鸣志自动控制设备有限公司 | It is a kind of to be used to reduce the control device of power standby power consumption |
| US10015434B2 (en) | 2016-04-22 | 2018-07-03 | Shenzhen Skyworth-Rgb Electronic Co., Ltd | Switched-mode power supply for outputting a steady voltage and current and television including the same |
| CN105813263B (en) * | 2016-04-22 | 2018-06-29 | 深圳创维－Rgb电子有限公司 | Switching Power Supply and television set |
| CN107515658B (en) * | 2016-06-17 | 2019-12-31 | 南宁富桂精密工业有限公司 | Power supply system and power supply method |
| TWI633426B (en) | 2016-06-17 | 2018-08-21 | 新加坡商雲網科技新加坡有限公司 | Power supply system and method |
| CN112938904A (en) * | 2021-03-25 | 2021-06-11 | 东风汽车集团股份有限公司 | Low-power-consumption standby control system and method for vehicle-mounted oxygen generator and storage medium |
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| CN201869299U (en) * | 2010-10-26 | 2011-06-15 | 深圳创维－Rgb电子有限公司 | Standby control circuit and television |
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| CN201869299U (en) * | 2010-10-26 | 2011-06-15 | 深圳创维－Rgb电子有限公司 | Standby control circuit and television |
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