CN102739061B - Power supply method, power supply circuit and electronic equipment - Google Patents
Power supply method, power supply circuit and electronic equipment Download PDFInfo
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- CN102739061B CN102739061B CN201210210990.2A CN201210210990A CN102739061B CN 102739061 B CN102739061 B CN 102739061B CN 201210210990 A CN201210210990 A CN 201210210990A CN 102739061 B CN102739061 B CN 102739061B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The invention discloses a power supply method, a power supply circuit and electronic equipment. The power supply circuit is connected with a rectification module in the electronic equipment. The electronic equipment has a working state and a standby state. The power supply circuit comprises a control module, a conversion module and a feedback module, wherein the control module is connected with the rectification module; the conversion module is connected with the control module and used for converting working voltage which is supplied by the rectification module into output voltage which can be used by at least one electrical module in the electronic equipment; the feedback module is connected with the control module; and when the electronic equipment is in the standby state, the feedback module generates a feedback signal and sends the feedback signal to the control module, and the control module controls the output power of the conversion module to be reduced on the basis of the feedback signal, so the power supply circuit enters a standby mode.
Description
Technical field
The application relates to field of power systems, particularly a kind of method of supplying power to, power supply circuits and electronic equipment.
Background technology
Along with the development of science and technology, electronic technology have also been obtained development at full speed, and the kind of electronic product also gets more and more, and people have also enjoyed the various facilities that scientific development brings.Present people can pass through various types of electronic equipment, enjoy along with scientific development bring comfortable life.
Such as, along with the development of electronic technology, LCD TV starts to appear in the life of people more and more with its advantage such as high-environmental, low energy consumption, brought seeing and hearing enjoyment, and the performance of power supply to LCD TV has conclusive effect.As shown in Figure 1, Fig. 1 is the system architecture diagram of power supply in prior art, in prior art, the power supply of LCD TV all can comprise a power control factors control (PFC, PowerFactor Correction) circuit, to improve power factor value (PF value) and harmonic factor, then change-over circuit (LLC circuit or other change-over circuits) is being connect again afterwards to power to the mainboard of LCD TV and display drive circuit, be in the power consumption of holding state to reduce LCD TV simultaneously, also need to use special stand-by circuit, just can reach the target of LCD TV low-power consumption when standby.
But present inventor is in the process realizing invention technical scheme in the embodiment of the present application, find that above-mentioned technology at least exists following technical problem:
System architecture is complicated: in prior art, the input voltage of power supply first through special pfc circuit, then just will be powered to mainboard and display drive circuit by change-over circuit;
Also need to use special stand-by circuit, system architecture is very complicated, and the cost of system is also relatively high simultaneously.
Summary of the invention
The embodiment of the present application, by providing a kind of method of supplying power to, power supply circuits and electronic equipment, solves the technical problem of the system architecture complexity of power supply in prior art.
The embodiment of the present application provides a kind of power supply circuits, be connected with the rectification module in an electronic equipment, described electronic equipment comprises operating state and holding state, described power supply circuits comprise: control module, be connected with described rectification module, described control module specifically comprises: flyback driving chip, described flyback driving chip first pin HV pin is connected with described rectification module by the first resistance, second pin of described flyback driving chip leads to AC pin to be crossed the second resistance and is connected with described rectification module, the three-prong FB pin of described flyback driving chip is connected with feedback module, the ground pin ground connection of described flyback driving chip, 4th pin VCC power pin of described flyback driving chip is connected with modular converter, regulon, comprise the first pin, second pin and the 3rd pin, wherein, described first pin is connected with the 5th pin DRV pin of described flyback driving chip, described second pin is connected with described modular converter, and described 3rd pin is connected with the 6th pin CS pin of described flyback driving chip, wherein, described flyback driving chip is specially N800 chip, and described modular converter is transformer, and the electric current of described transformer is I=U*ton/L, and wherein, ton is the time that switch is connected at every turn, and L is the inductance of transformer, and U is input voltage,
Described modular converter, is connected with described control module, and the operating voltage for being provided by rectification module is converted to can for the output voltage of at least one electricity consumption module in described electronic equipment; Described feedback module, is connected with described control module; Wherein, when described electronic equipment is in described holding state, described feedback module generates a feedback signal and sends to described control module, the power output that described control module controls described voltage transformation module based on described feedback signal reduces, thus makes described power supply circuits enter standby mode.
Optionally, described modular converter specifically comprises: the first primary coil, and the first end of described first primary coil is connected with described control module, the second end ground connection of described first primary coil; Second primary coil, first of described second primary coil is connected with described rectification module, and the second end of described second primary coil is connected with described control module; First secondary coil, the first end ground connection of described first secondary coil, the second end of described first secondary coil is connected with the first output interface; Second subprime coil, the first end of described second subprime coil is connected with the second output interface, and the second end of described second subprime coil is connected with described feedback module.
Optionally, described feedback module is specially: photoelectrical coupler, described photoelectric coupling implement body comprises the first diode and the first triode, the positive pole of described first diode is connected with at least one electricity consumption module described, the minus earth of described first diode, the grounded emitter of described first triode, the collector electrode of described first triode is connected with described control module; Wherein, when described electronic equipment is in described holding state, the light that described first diode sends weakens, and the collector current of described first triode is weakened, thus generates described feedback signal and send to described control module.
The embodiment of the present application provides a kind of electronic equipment, and described electronic equipment comprises: display screen, comprises mode of operation and standby mode; Mainboard, is connected with described display screen; Rectification module, for being converted to operating voltage by input voltage; Power supply circuits, the input of described supply current is connected with described rectification module, the output of described output circuit is connected with described mainboard with described display screen respectively, when described display screen is in described mode of operation, described power supply circuits export the first output voltage and the second output voltage, described first output voltage is for described mainboard, described second output voltage is for described display screen, when described display screen is in described standby mode, described power supply circuits export the first output voltage, for described mainboard; Wherein, described power supply circuits comprise: control module, be connected with described rectification module, described control module specifically comprises: flyback driving chip, described flyback driving chip first pin HV pin is connected with described rectification module by the first resistance, second pin AC pin of described flyback driving chip is connected with described rectification module by the second resistance, the three-prong FB pin of described flyback driving chip is connected with feedback module, the ground pin ground connection of described flyback driving chip, the 4th pin VCC power pin of described flyback driving chip is connected with modular converter; Regulon, comprise the first pin, second pin and the 3rd pin, wherein, described first pin is connected with the 5th pin DRV pin of described flyback driving chip, described second pin is connected with described modular converter, and described 3rd pin is connected with the 6th pin CS pin of described flyback driving chip; Wherein, described flyback driving chip is specially N800 chip, and described modular converter is transformer, and the electric current of described transformer is I=U*ton/L, and wherein, ton is the time that switch is connected at every turn, and L is the inductance of transformer, and U is input voltage; Described modular converter, is connected with described control module, for described operating voltage being converted to described first output voltage and described second output voltage; Described feedback module, is connected with described control module; Wherein, when described electronic equipment is in holding state, described feedback module generates a feedback signal and sends to described control module, and the power output that described control module controls described modular converter reduces, thus makes described power supply circuits enter standby mode.
Optionally, described modular converter specifically comprises: the first primary coil, and the first end of described first primary coil is connected with described control module, the second end ground connection of described first primary coil; Second primary coil, first of described second primary coil is connected with described rectification module, and the second end of described second primary coil is connected with described control module; First secondary coil, the first end ground connection of described first secondary coil, the second end of described first secondary coil is connected with the first output interface; Second subprime coil, the first end of described second subprime coil is connected with the second output interface, and the second end of described second subprime coil is connected with described feedback module.
Optionally, described feedback module is specially: photoelectrical coupler, described photoelectric coupling implement body comprises the first diode and the first triode, the positive pole of described first diode is connected with power device, the minus earth of described first diode, the grounded emitter of described first triode, the collector electrode of described first triode is connected with described control module; Wherein, when described display screen is in described holding state, the light that described first diode sends weakens, and the collector current of described first triode is weakened, thus generates described feedback signal and send to described control module.
The one or more technical schemes provided in the embodiment of the present application, at least have following technique effect or advantage:
1, realize power factor controlling function and idle function owing to have employed flyback driving chip simultaneously, convert so the power frequency supply after rectification can be powered directly to circuit of reversed excitation without power frequency electrochemical capacitor, make the system architecture of power supply very simple, corresponding system cost also decreases.
2, owing to have employed feedback module to reflect the loading condition of circuit output end, if the load reduction of output, then feedback module generates and feeds back signal to control module, and the power output that control module controls modular converter based on feedback signal reduces, thus low-power consumption target when can reach standby.
3, because the regulon in control module has frequency jittering function, peak value when electromagnetic interference (EMI, Electromagnetic Interference) is tested can be reduced, pass through Electromagnetic Interference Test smoothly.
4, because modular converter can adopt Multiple coil to export, modular converter can export all kinds of secondary DC-DC power supply (DC-DC), comprise light-emitting diode (LED, Light Emitting Diode) drive, Cold Cathode Fluorescent fluorescent tube (CCFL, Cold Cathode Fluorescent Lamp) drive or other drive etc.
Accompanying drawing explanation
Fig. 1 is the system architecture diagram of power supply in the application's prior art;
The method of supplying power to flow chart of Fig. 2 for providing in the application one embodiment;
The Organization Chart of power supply circuits of Fig. 3 for providing in the application one embodiment;
The functional block diagram of electronic equipment of Fig. 4 for providing in the application one embodiment;
First voltage oscillogram through over commutation process of Fig. 5 for providing in the application one embodiment;
The circuit diagram of power supply circuits of Fig. 6 for providing in the application one embodiment.
Embodiment
The embodiment of the present application, by providing a kind of method of supplying power to, power supply circuits and electronic equipment, solves the technical problem of the system architecture complexity of power supply in prior art.
Technical scheme in the embodiment of the present application is the technical problem of the system architecture complexity solving above-mentioned power supply, and general thought is as follows:
By using circuit of reversed excitation to realize power factor controlling function and idle function simultaneously, convert so the power frequency supply after rectification can be powered directly to circuit of reversed excitation without power frequency electrochemical capacitor, make the system architecture of power supply very simple.
In order to make the application the technical staff in the technical field more clearly understand the application, below in conjunction with accompanying drawing, by specific embodiment, technical scheme is described in detail.
Embodiment one:
The present embodiment provides a kind of method of supplying power to, and be applied on an electronic equipment, electronic equipment at least comprises operating state and holding state, and as shown in Figure 2, Fig. 2 is the flow chart of the method for supplying power to that the present embodiment provides, and the method comprises:
Step S1: obtain an input voltage;
Step S2: carry out rectification process to input voltage, obtains the first voltage;
First voltage transitions is at least one output voltage of at least one the electricity consumption module being input to electronic equipment by the power supply circuits in electronic equipment by step S3: when electronic equipment is in running order; When electronic equipment is in holding state, controls power supply circuits and be in standby mode.
The present embodiment provides a kind of power supply circuits, as shown in Figure 3, Fig. 3 is the Organization Chart of the power supply circuits that the present embodiment provides, these power supply circuits are connected with the rectification module in an electronic equipment, electronic equipment comprises operating state and holding state, power supply circuits comprise: control module 301, is connected with rectification module; Modular converter 302, is connected with control module 301, and the operating voltage for being provided by rectification module is converted to can at least one electricity consumption module 303 uses in electronic device output voltage; Feedback module 304, is connected with control module; Wherein, when electronic equipment is in holding state, feedback module 304 generates a feedback signal and sends to control module 301, and the power output that control module 301 controls modular converter 302 based on feedback signal reduces, thus makes power supply circuits enter standby mode.
The present embodiment also provides a kind of electronic equipment, please refer to Fig. 4, and Fig. 4 is the functional block diagram of the electronic equipment that the present embodiment provides, and electronic equipment comprises: display screen 401, comprises mode of operation and standby mode; Mainboard 402, is connected with display screen 401; Rectification module 403, for being converted to operating voltage by input voltage; Power supply circuits 404, the input of power supply circuits is connected with rectification module, the output of output circuit is connected with mainboard with display screen respectively, when display screen is in mode of operation, power supply circuits export the first output voltage and the second output voltage, and the first output voltage is for mainboard, second output voltage is for display screen, when display screen is in standby mode, power supply circuits export the first output voltage, for mainboard.
Below in conjunction with Fig. 3, Fig. 3 and Fig. 4, the specific works principle of the specific implementation process of the method for supplying power to provided in embodiment one and power supply circuits, electronic equipment is described in detail.
The method of supplying power to that the present embodiment provides can be applied in above-mentioned power supply circuits and electronic equipment, in the following description, will take electronic equipment as LCD TV is example, is described in detail.
A kind of method of supplying power to that the present embodiment provides, be applied on an electronic equipment, electronic equipment at least comprises operating state and holding state, comprises step:
Step S1: obtain an input voltage.
Specifically, in the present embodiment, S1 is specially: obtain the input voltage being used for LCD TV and running, in actual applications, can be power to LCD TV, LCD TV can be run.
In a particular application, namely power to the rectification module shown in Fig. 3, be also power to the rectification module 403 in the electronic equipment shown in Fig. 4 simultaneously.
Step S2: carry out rectification process to input voltage, obtains the first voltage.
Specifically, in the present embodiment, S2 is specially: carry out rectification process by the rectification module in LCD TV to input voltage, obtain the first voltage, in actual applications, can be that rectification process is carried out to the alternating current of input, obtain pulsating dc voltage after treatment.
In a particular application, the waveform of pulsating dc voltage can be oscillogram as shown in Figure 5, the oscillogram that the oscillogram of pulsating dc voltage is rectification module herein when being bridge rectifier, the oscillogram of pulsating dc voltage is commonly called as " steamed bun ripple " herein, those of ordinary skill in the art easily knows, get the oscillogram of pulsating dc voltage is different by different rectifier systems, those of ordinary skill in the art can according to the needs of actual conditions, select suitable rectification processing mode, as halfwave rectifier, full-wave rectification etc.
First voltage transitions is at least one output voltage of at least one the electricity consumption module being input to electronic equipment by the power supply circuits in electronic equipment by step S3: when electronic equipment is in running order; When electronic equipment is in holding state, controls power supply circuits and be in standby mode.
Specifically, when electronic equipment is in running order, be at least one output voltage of at least one the electricity consumption module being input to electronic equipment by the first voltage transitions by the power supply circuits in electronic equipment, modular converter 302 in the power supply circuits namely provided by the present embodiment, it is at least one input voltage of at least one the electricity consumption module be input in LCD TV by the first voltage transitions, in the present embodiment, can be by the voltage of the first voltage transitions required for the display screen of LCD TV and the voltage required for mainboard.
In the present embodiment, as shown in Figure 3, power supply circuits specifically comprise: control module 301, is connected with rectification module; Modular converter 302, is connected with control module 301, and the operating voltage for being provided by rectification module is converted to can at least one electricity consumption module 303 uses in electronic device output voltage; Feedback module 304, is connected with control module.
Please refer to Fig. 6, the circuit diagram of power supply circuits of Fig. 6 for providing in the present embodiment, control module 301 can comprise: flyback driving chip, first pin of flyback driving chip is connected with rectification module by the first resistance, second pin of flyback driving chip is connected with rectification module by the second resistance, the three-prong of flyback driving chip is connected with feedback module, the ground pin ground connection of flyback driving chip, and the 4th pin of flyback driving chip is connected with modular converter; Regulon, comprises the first pin, the second pin and the 3rd pin, and wherein, the first pin is connected with the 5th pin of flyback driving chip, and the second pin is connected with modular converter, and the 3rd pin is connected with the 6th pin of flyback driving chip.
In the embody rule of the present embodiment, flyback driving chip can be specifically N800 chip, first pin of N800 chip can be HV pin, HV pin can be connected with rectification module, second pin can be AC pin, AC pin can be connected with rectification module, three-prong can be FB pin, FB pin can be connected with feedback module 304, 4th pin can be VCC power pin, VCC pin can be connected with modular converter 302, regulon can be specifically metal-oxide layer-semiconductor-field-effect transistor (MOSFET, Metal-Oxide-Semiconductor Field-Effect Transistor), this metal-oxide layer-semiconductor-field-effect transistor comprises 3 pins, three electrode: G (grid) of metal-oxide layer-semiconductor-field-effect transistor respectively, S (source electrode) and D (drain electrode), wherein, G pole is connected with the 5th pin DRV pin of N800, D pole is connected with modular converter 302, S pole is connected with the 6th pin CS pin of N800 chip, in a particular application, metal-oxide-semiconductor drain electrode can at the valley conduction of voltage waveform, to reduce the temperature rise of MOS and pair limit diode, raise the efficiency.Of course, in actual applications, those of ordinary skill in the art can also according to actual conditions, and the electronic device combination selecting other to have said function replaces the control module introduced in the present embodiment.
Above-mentionedly in detail clearly illustrate the detailed formation of control module 301, next the detailed formation of modular converter 302 is introduced, please continue to refer to Fig. 6, modular converter 302 can be specifically that a transformer T800 comprises: the first primary coil, the first end of the first primary coil is connected with control module 301, the second end ground connection of the first primary coil; Second primary coil, the first end of the second primary coil is connected with rectification module, and the second end of the second primary coil is connected with control module 301; First secondary coil, the first end ground connection of the first secondary coil, the second end of the first secondary coil is connected with the first output interface; Second subprime coil, the first end of second subprime coil is connected with the second output interface, and the second end of second subprime coil is connected with feedback module 304.In the present embodiment, the coil design that modular converter 302 have employed can export display screen demand voltage, audio power amplifier demand voltage, the standby and mainboard demand voltage of LCD TV, in actual applications, output voltage according to actual conditions, can also be adjusted to the output voltage that can meet actual needs by those of ordinary skill in the art.
In detail clearly illustrate the detailed formation of modular converter 302 above, the detailed formation introducing feedback module 304 detailed below, please continue to refer to Fig. 6, feedback module 304 is specially photoelectrical coupler, comprise: the first diode and the first triode, the positive pole of the first diode is connected with at least one electricity consumption module, the minus earth of the first diode, the grounded emitter of the first triode, the collector electrode of the first triode is connected with control module 301, wherein, when electronic equipment is in holding state, the light that first diode sends weakens, the collector current of the first triode is weakened, thus generate feedback signal and send to control module 301.Of course, those of ordinary skill in the art, after the concrete function having understood feedback module 304, can also, according to actual conditions, use other electronic devices and components with said function to replace feedback module 304.
Above-mentioned part describes the detailed formation of control module 301, modular converter 302, feedback module 304 respectively in detail, introduces the concrete engagement process of control module 301, modular converter 302, feedback module 304 below.
Please continue to refer to Fig. 6, the input variable of the N800 chip in control module 301 can comprise: power frequency inputs, the sampling of power frequency steamed bun ripple inputs and the feed back input of late-class circuit, and the power supply circuits that the present embodiment provides realize PFC function two kinds of methods:
The first, this circuit of reversed excitation adopts the steamed bun ripple after industrial frequency rectifying as a reference, this steamed bun ripple after the calculation process of N800 chip as the peak level signal of current-mode control, the synchronous sinusoidal steamed bun ripple of its sine-wave synchronous remaining and input, each flows through the current peak of flyback transformer all by its restriction; Like this, the envelope of current waveform is the sine wave of the synchronous homophase with input AC, thus achieves power factor correction.
The second, owing to flowing through the electric current I=U*ton/L of transformer T800, wherein, ton is the time that switch is connected at every turn, L is the inductance of transformer T800, and after transformer T800 designs, L is a fixed value, if keep the MOS ON time ton of each switch periods constant, then electric current I is just only relevant with input voltage U; And after this circuit rectifies, there is no electrochemical capacitor, so voltage U remains a sinusoidal steamed bun ripple, control loop design makes the ON time of the HF switch within the time of a power frequency period constant, make input current waveform naturally follow input voltage waveform, thus achieve power factor correction.
In S3, method also comprises, when electronic equipment is in holding state, control power supply circuits and be in standby mode, specifically, can refer to when electronic equipment is in holding state, the load reduction of the output of power supply circuits, the power reduction of namely electricity consumption module 303, then the feedback module 304 of power supply circuits generates and feeds back signal to control module 301, the power output that control module 301 controls modular converter 302 based on feedback signal reduces, thus can reach low-power consumption target when LCD TV is in standby.
Specifically, N800 chip in control module 301 also has the function of frequency hopping, the FB pin of N800 chip can get the feedback information of feedback module 304 transmission, the power output of control transformer T800 reduces, such as when the electricity consumption module of the output of transformer T800 is in holding state, flow through the current decay of the first diode in feedback module 304, so the light that the first diode sends weakens, thus collector current in the first triode in feedback module 304 is weakened, thus generate feedback signal and send to the N800 chip in control module 301, N800 chip controls the ON time of metal-oxide layer-semiconductor-field-effect transistor according to feedback signal, thus reduce the power output of modular converter 302, reach the low-power consumption target that LCD TV is in holding state.
The embodiment of the present application one provides a kind of power supply circuits, is connected with the rectification module in an electronic equipment, and electronic equipment comprises operating state and holding state, and power supply circuits specifically comprise: control module 301, is connected with rectification module; Modular converter 302, is connected with control module, and the operating voltage for being provided by rectification module is converted to can at least one electricity consumption module 303 uses in electronic device output voltage; Feedback module 304, is connected with control module 301; Wherein, when electronic equipment is in holding state, feedback module 304 generates a feedback signal and sends to control module 301, and control module 301 reduces based on the power output of feedback signal control voltage modular converter 302, thus makes power supply circuits enter standby mode.
In the present embodiment, control module specifically comprises: flyback driving chip, flyback driving chip first pin is connected with rectification module by the first resistance, second pin of flyback driving chip is connected with rectification module by the second resistance, the three-prong of flyback driving chip is connected with feedback module, the ground pin ground connection of flyback driving chip, the 4th pin of flyback driving chip is connected with modular converter; Regulon, comprises the first pin, the second pin and the 3rd pin, and wherein, the first pin is connected with the 5th pin of flyback driving chip, and the second pin is connected with modular converter, and the 3rd pin is connected with the 6th pin of flyback driving chip.
In the present embodiment, modular converter specifically comprises: the first primary coil, and described in, the first end of the first primary coil is connected with described control module, the second end ground connection of described first primary coil; Second primary coil, first of described second primary coil is connected with described rectification module, and the second end of described second primary coil is connected with described control module; First secondary coil, the first end ground connection of described first secondary coil, the second end of described first secondary coil is connected with the first output interface; Second subprime coil, the first end of described second subprime coil is connected with the second output interface, and the second end of described second subprime coil is connected with described feedback module.
In the present embodiment, feedback module is specially: photoelectrical coupler, photoelectric coupling implement body comprises the first diode and the first triode, the positive pole of the first diode is connected with at least one electricity consumption module, the minus earth of the first diode, the grounded emitter of the first triode, the collector electrode of the first triode is connected with control module; Wherein, when electronic equipment is in holding state, the light that the first diode sends weakens, and the collector current of the first triode is weakened, thus generates feedback signal and send to control module.
Because the part at front describing method is described in detail in conjunction with the concrete structure of power supply circuits, so succinct in order to specification, just repeat no more at this.
The embodiment of the present application provides a kind of electronic equipment, and electronic equipment comprises: display screen, comprises mode of operation and standby mode; Mainboard, is connected with display screen; Rectification module, for being converted to operating voltage by input voltage; Power supply circuits, the input of supply current is connected with rectification module, the output of output circuit is connected with mainboard with display screen respectively, when display screen is in mode of operation, power supply circuits export the first output voltage and the second output voltage, and the first output voltage is for mainboard, second output voltage is for display screen, when display screen is in standby mode, power supply circuits export the first output voltage, for mainboard.
In the present embodiment, power supply circuits comprise: control module, are connected with rectification module; Modular converter, is connected with control module, for operating voltage being converted to the first output voltage and the second output voltage; Feedback module, is connected with control module; Wherein, when electronic equipment is in holding state, feedback module generates a feedback signal and sends to control module, and the power output that control module controls modular converter reduces, thus makes power supply circuits enter standby mode.
In the present embodiment, control module specifically comprises: flyback driving chip, flyback driving chip first pin is connected with rectification module by the first resistance, second pin of flyback driving chip is connected with rectification module by the second resistance, the three-prong of flyback driving chip is connected with feedback module, the ground pin ground connection of flyback driving chip, the 4th pin of flyback driving chip is connected with modular converter; Regulon, comprises the first pin, the second pin and the 3rd pin, and wherein, the first pin is connected with the 5th pin of flyback driving chip, and the second pin is connected with modular converter, and the 3rd pin is connected with the 6th pin of flyback driving chip.
In the present embodiment, modular converter specifically comprises: the first primary coil, and the first end of described first primary coil is connected with described control module, the second end ground connection of described first primary coil; Second primary coil, first of described second primary coil is connected with described rectification module, and the second end of described second primary coil is connected with described control module; First secondary coil, the first end ground connection of described first secondary coil, the second end of described first secondary coil is connected with the first output interface; Second subprime coil, the first end of described second subprime coil is connected with the second output interface, and the second end of described second subprime coil is connected with described feedback module.
In the present embodiment, feedback module is specially: photoelectrical coupler, photoelectric coupling implement body comprises the first diode and the first triode, the positive pole of the first diode is connected with power device, the minus earth of the first diode, the grounded emitter of the first triode, the collector electrode of the first triode is connected with control module; Wherein, when display screen is in holding state, the light that the first diode sends weakens, and the collector current of the first triode is weakened, thus generates feedback signal and send to control module.
Due to the power supply circuits that the power supply circuits in the electronic equipment in the present embodiment and preceding sections embodiment provide, in the front detailed construction and the carrying out practically process that have described power supply circuits in detail, so succinct in order to specification, just repeat no more at this.
Technical scheme in above-mentioned the embodiment of the present application, at least has following technique effect or advantage:
1, realize power factor controlling function and idle function owing to have employed flyback driving chip simultaneously, convert so the power frequency supply after rectification can be powered directly to circuit of reversed excitation without power frequency electrochemical capacitor, make the system architecture of power supply very simple, corresponding system cost also decreases.
2, owing to have employed feedback module to reflect the loading condition of circuit output end, if the load reduction of output, then feedback module generates and feeds back signal to control module, and the power output that control module controls modular converter based on feedback signal reduces, thus low-power consumption target when can reach standby.
3, because the regulon in control module has frequency jittering function, peak value when electromagnetic interference (EMI, Electromagnetic Interference) is tested can be reduced, pass through Electromagnetic Interference Test smoothly.
4, because modular converter can adopt Multiple coil to export, modular converter can export all kinds of secondary DC-DC power supply (DC-DC), comprise light-emitting diode (LED, Light Emitting Diode) drive, Cold Cathode Fluorescent fluorescent tube (CCFL, Cold Cathode Fluorescent Lamp) drive or other drive etc.
Obviously, those skilled in the art can carry out various change and modification to the application and not depart from the spirit and scope of the application.Like this, if these amendments of the application and modification belong within the scope of the application's claim and equivalent technologies thereof, then the application is also intended to comprise these change and modification.
Claims (6)
1. power supply circuits, are connected with the rectification module in an electronic equipment, and described electronic equipment comprises operating state and holding state, it is characterized in that, described power supply circuits comprise:
Control module, be connected with described rectification module, described control module specifically comprises: flyback driving chip, described flyback driving chip first pin HV pin is connected with described rectification module by the first resistance, second pin AC pin of described flyback driving chip is connected with described rectification module by the second resistance, the three-prong FB pin of described flyback driving chip is connected with feedback module, the ground pin ground connection of described flyback driving chip, the 4th pin VCC power pin of described flyback driving chip is connected with modular converter; Regulon, comprise the first pin, second pin and the 3rd pin, wherein, described first pin is connected with the 5th pin DRV pin of described flyback driving chip, described second pin is connected with described modular converter, and described 3rd pin is connected with the 6th pin CS pin of described flyback driving chip; Wherein, described flyback driving chip is specially N800 chip, and described modular converter is transformer, and the electric current of described transformer is I=U*ton/L, and wherein, ton is the time that switch is connected at every turn, and L is the inductance of transformer, and U is input voltage;
Described modular converter, is connected with described control module, and the operating voltage for being provided by rectification module is converted to can for the output voltage of at least one electricity consumption module in described electronic equipment;
Described feedback module, is connected with described control module;
Wherein, when described electronic equipment is in described holding state, described feedback module generates a feedback signal and sends to described control module, and the power output that described control module controls described modular converter based on described feedback signal reduces, thus makes described power supply circuits enter standby mode.
2. power supply circuits as claimed in claim 1, it is characterized in that, described modular converter specifically comprises:
First primary coil, the first end of described first primary coil is connected with described control module, the second end ground connection of described first primary coil;
Second primary coil, the first end of described second primary coil is connected with described rectification module, and the second end of described second primary coil is connected with described control module;
First secondary coil, the first end ground connection of described first secondary coil, the second end of described first secondary coil is connected with the first output interface;
Second subprime coil, the first end of described second subprime coil is connected with the second output interface, and the second end of described second subprime coil is connected with described feedback module.
3. power supply circuits as claimed in claim 1, it is characterized in that, described feedback module is specially:
Photoelectrical coupler, described photoelectric coupling implement body comprises the first diode and the first triode, the positive pole of described first diode is connected with at least one electricity consumption module described, the minus earth of described first diode, the grounded emitter of described first triode, the collector electrode of described first triode is connected with described control module;
Wherein, when described electronic equipment is in described holding state, the light that described first diode sends weakens, and the collector current of described first triode is weakened, thus generates described feedback signal and send to described control module.
4. an electronic equipment, is characterized in that, described electronic equipment comprises:
Display screen, comprises mode of operation and standby mode;
Mainboard, is connected with described display screen;
Rectification module, for being converted to operating voltage by input voltage;
Power supply circuits, the input of described power supply circuits is connected with described rectification module, the output of described power supply circuits is connected with described mainboard with described display screen respectively, when described display screen is in described mode of operation, described power supply circuits export the first output voltage and the second output voltage, described first output voltage is for described mainboard, described second output voltage is for described display screen, when described display screen is in described standby mode, described power supply circuits export described first output voltage, for described mainboard;
Wherein, described power supply circuits comprise:
Control module, be connected with described rectification module, described control module specifically comprises: flyback driving chip, described flyback driving chip first pin HV pin is connected with described rectification module by the first resistance, second pin AC pin of described flyback driving chip is connected with described rectification module by the second resistance, the three-prong FB pin of described flyback driving chip is connected with feedback module, the ground pin ground connection of described flyback driving chip, the 4th pin VCC power pin of described flyback driving chip is connected with modular converter; Regulon, comprise the first pin, second pin and the 3rd pin, wherein, described first pin is connected with the 5th pin DRV pin of described flyback driving chip, described second pin is connected with described modular converter, and described 3rd pin is connected with the 6th pin CS pin of described flyback driving chip; Wherein, described flyback driving chip is specially N800 chip, and described modular converter is transformer, and the electric current of described transformer is I=U*ton/L, and wherein, ton is the time that switch is connected at every turn, and L is the inductance of transformer, and U is input voltage;
Described modular converter, is connected with described control module, for described operating voltage being converted to described first output voltage and described second output voltage;
Described feedback module, is connected with described control module; Wherein, when described electronic equipment is in holding state, described feedback module generates a feedback signal and sends to described control module, and the power output that described control module controls described modular converter reduces, thus makes described power supply circuits enter standby mode.
5. electronic equipment as claimed in claim 4, it is characterized in that, described modular converter specifically comprises:
First primary coil, the first end of described first primary coil is connected with described control module, the second end ground connection of described first primary coil;
Second primary coil, the first end of described second primary coil is connected with described rectification module, and the second end of described second primary coil is connected with described control module;
First secondary coil, the first end ground connection of described first secondary coil, the second end of described first secondary coil is connected with the first output interface;
Second subprime coil, the first end of described second subprime coil is connected with the second output interface, and the second end of described second subprime coil is connected with described feedback module.
6. electronic equipment as claimed in claim 4, it is characterized in that, described feedback module is specially:
Photoelectrical coupler, described photoelectric coupling implement body comprises the first diode and the first triode, the positive pole of described first diode is connected with power device, the minus earth of described first diode, the grounded emitter of described first triode, the collector electrode of described first triode is connected with described control module;
Wherein, when described display screen is in described holding state, the light that described first diode sends weakens, and the collector current of described first triode is weakened, thus generates described feedback signal and send to described control module.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510438459.4A CN105099202B (en) | 2012-06-25 | 2012-06-25 | A kind of method of supplying power to, power supply circuit and electronic equipment |
| CN201210210990.2A CN102739061B (en) | 2012-06-25 | 2012-06-25 | Power supply method, power supply circuit and electronic equipment |
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| CN201210210990.2A CN102739061B (en) | 2012-06-25 | 2012-06-25 | Power supply method, power supply circuit and electronic equipment |
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| CN201510438459.4A Division CN105099202B (en) | 2012-06-25 | 2012-06-25 | A kind of method of supplying power to, power supply circuit and electronic equipment |
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| CN102739061B true CN102739061B (en) | 2015-07-01 |
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| CN103259992B (en) * | 2013-04-01 | 2016-02-10 | 青岛海信电器股份有限公司 | Standby power circuit and idle method |
| CN107105178B (en) * | 2017-04-20 | 2019-07-02 | 深圳市华星光电技术有限公司 | TV set power |
| CN107492865B (en) * | 2017-08-21 | 2019-11-26 | 深圳创维－Rgb电子有限公司 | A kind of alternating current power failure response circuit and electrical equipment |
| CN107948747B (en) * | 2017-12-07 | 2020-06-23 | 海信视像科技股份有限公司 | Power supply management method and unit and television |
| CN109547721B (en) * | 2018-12-25 | 2021-06-01 | 深圳创维－Rgb电子有限公司 | Television power supply driving device and television |
| CN111724747B (en) * | 2019-03-20 | 2021-10-22 | 海信视像科技股份有限公司 | Display device and power supply starting method |
| CN111009958B (en) * | 2019-12-13 | 2021-04-27 | 漳州科华技术有限责任公司 | Power supply control circuit |
| WO2021185150A1 (en) | 2020-03-18 | 2021-09-23 | 海信视像科技股份有限公司 | Display apparatus and display control method |
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Also Published As
| Publication number | Publication date |
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| CN102739061A (en) | 2012-10-17 |
| CN105099202A (en) | 2015-11-25 |
| CN105099202B (en) | 2018-11-02 |
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Address after: 266100 Zhuzhou Road, Laoshan District, Shandong, No. 151, No. Patentee after: Hisense Video Technology Co., Ltd Address before: 266100 Zhuzhou Road, Laoshan District, Shandong, No. 151, No. Patentee before: HISENSE ELECTRIC Co.,Ltd. |
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