CN105099202B - A kind of method of supplying power to, power supply circuit and electronic equipment - Google Patents
A kind of method of supplying power to, power supply circuit and electronic equipment Download PDFInfo
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- CN105099202B CN105099202B CN201510438459.4A CN201510438459A CN105099202B CN 105099202 B CN105099202 B CN 105099202B CN 201510438459 A CN201510438459 A CN 201510438459A CN 105099202 B CN105099202 B CN 105099202B
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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
This application discloses a kind of method of supplying power to, power supply circuit and electronic equipment, power supply circuit is connect with the rectification module in an electronic equipment, and the electronic equipment includes working condition and standby mode, and the power supply circuit includes：Control module is connected with the rectification module；Conversion module is connected with the control module, and the operating voltage for providing rectification module is converted at least one electricity consumption module uses in the electronic equipment output voltage；Feedback module is connected with the control module.
Description
The application be propose on 06 25th, 2012 entitled " a kind of method of supplying power to, power supply circuit and electronics are set
It is standby " Chinese invention patent application 201210210990.2 divisional application.
Technical field
This application involves field of power systems, more particularly to a kind of method of supplying power to, power supply circuit and electronic equipment.
Background technology
With the continuous development of science and technology, electronic technology has also obtained development at full speed, and the type of electronic product is also got over
Come more, people have also enjoyed the various facilities that scientific development is brought.Present people can be set by various types of electronics
It is standby, enjoy the comfortable life brought with scientific development.
For example, with the continuous development of electronic technology, LCD TV the advantages that its high-environmental, low energy consumption to start more next
Occur in people's lives, having brought seeing and hearing enjoyment more, and power supply has decision to the performance of LCD TV
The effect of property.As shown in Figure 1, Fig. 1 is the system architecture diagram of power supply in the prior art, the power supply of LCD TV is all in the prior art
Can include that a power control factors control（PFC, Power Factor Correction）Circuit, to improve power factor value
（PF values）And harmonic wave factor, then followed by conversion circuit（LLC circuits or other conversion circuits）With to LCD TV
Mainboard and display drive circuit power supply, while in order to reduce the power consumption that LCD TV is in standby, it is also necessary to using special
Stand-by circuit can be only achieved the target of LCD TV low-power consumption when standby.
But present inventor has found above-mentioned technology extremely during inventive technique scheme in realizing the embodiment of the present application
It has the following technical problems less：
System architecture is complicated：The input voltage of power supply will first pass through dedicated pfc circuit in the prior art, then could lead to
Conversion circuit is crossed to power to mainboard and display drive circuit；
It also needs to use dedicated stand-by circuit simultaneously, system architecture is sufficiently complex, and the cost of system is also relatively high.
Invention content
The embodiment of the present application solves in the prior art by a kind of method of supplying power to of offer, power supply circuit and electronic equipment
The technical problem of the system architecture complexity of power supply.
The embodiment of the present application provides a kind of power supply circuit, is connect with the rectification module in an electronic equipment, the electronics is set
Standby includes working condition and standby mode, and the power supply circuit includes：Control module is connected with the rectification module, the control
Molding block specifically includes：Flyback driving chip, flyback driving chip the first pin HV pins by first resistor with it is described
Rectification module is connected, and the logical AC pins of the second pin of the flyback driving chip cross second resistance and are connected with the rectification module,
The third pin FB pins of the flyback driving chip are connected with the feedback module, the ground pin of the flyback driving chip
Ground connection, the 4th pin VCC power pins of the flyback driving chip are connected with the conversion module；Adjusting unit, including the
One pin, second pin and third pin, wherein the 5th pin DRV of first pin and the flyback driving chip is managed
Foot is connected, and the second pin is connected with the conversion module, the 6th pipe of the third pin and the flyback driving chip
Foot CS pins are connected；Wherein, the input variable of the flyback driving chip includes：Power frequency input, the sampling input of power frequency steamed bun wave
With the feed back input of late-class circuit, the conversion module is a transformer, and the electric current of the transformer is I=U*ton/L,
In, ton is the time that switch is connected every time, and L is the inductance of transformer, and U is input voltage；
Conversion module is connected with the control module, and the operating voltage for providing rectification module is converted to for institute
State the output voltage that at least one electricity consumption module uses in electronic equipment；Feedback module is connected with the control module.
Optionally, the conversion module specifically includes：First primary coil, the first end of first primary coil and institute
It states control module to be connected, the second end ground connection of first primary coil；Second primary coil, the of second primary coil
One is connected with the rectification module, and the second end of second primary coil is connected with the control module；First secondary coil,
The first end of first secondary coil is grounded, and the second end of first secondary coil is connected with the first output interface；Second
The first end of secondary coil, the second subprime coil is connected with the second output interface, the second end of the second subprime coil
It is connected with the feedback module.
Optionally, the feedback module is specially：Photoelectrical coupler, the photoelectrical coupler specifically include the first diode
It is connected at least one electricity consumption module with the anode of the first triode, first diode, first diode
Cathode is grounded, and the emitter ground connection of first triode, the collector of first triode is connected with the control module；
Wherein, when the electronic equipment is in the standby mode, light that first diode is sent out weakens so that described the
The collector current of one triode weakens, to generate the feedback signal and be sent to the control module.
The embodiment of the present application provides a kind of electronic equipment, and the electronic equipment includes：Display screen, including operating mode with wait for
Machine pattern；Mainboard is connected with the display screen；Rectification module, for converting input voltage into operating voltage；Power supply circuit,
The input terminal of the supply current is connected with the rectification module, the output end of the output circuit respectively with the display screen and
The mainboard is connected, when the display screen be in the operating mode, the power supply circuit the first output voltage of output and the
Two output voltages, first output voltage are used for the mainboard, and second output voltage is used for the display screen,
When the display screen is in the standby mode, the power supply circuit exports the first output voltage, is used for the mainboard；Its
In, the power supply circuit includes：Control module is connected with the rectification module, and the control module specifically includes：Flyback drives
Chip, flyback driving chip the first pin HV pins are connected by first resistor with the rectification module, and the flyback is driven
Second pin AC pins of dynamic chip are connected by second resistance with the rectification module, the third pipe of the flyback driving chip
Foot FB pins are connected with the feedback module, the ground pin ground connection of the flyback driving chip, the flyback driving chip
4th pin VCC power pins are connected with the conversion module；Unit is adjusted, including the first pin, second pin and third are drawn
Foot, wherein first pin is connected with the 5th pin DRV pins of the flyback driving chip, the second pin and institute
It states conversion module to be connected, the third pin is connected with the 6th pin CS pins of the flyback driving chip；Wherein, described anti-
Swash driving chip input variable include：The feed back input of power frequency input, power frequency steamed bun wave sampling input and late-class circuit, it is described
Conversion module be a transformer, and the electric current of the transformer be I=U*ton/L, wherein ton be switch connect every time when
Between, L is the inductance of transformer, and U is input voltage；Conversion module is connected with the control module, is used for the operating voltage
Be converted to first output voltage and second output voltage；Feedback module is connected with the control module.
Optionally, the conversion module specifically includes：First primary coil, the first end of first primary coil and institute
It states control module to be connected, the second end ground connection of first primary coil；Second primary coil, the of second primary coil
One is connected with the rectification module, and the second end of second primary coil is connected with the control module；First secondary coil,
The first end of first secondary coil is grounded, and the second end of first secondary coil is connected with the first output interface；Second
The first end of secondary coil, the second subprime coil is connected with the second output interface, the second end of the second subprime coil
It is connected with the feedback module.
Optionally, the feedback module is specially：Photoelectrical coupler, the photoelectrical coupler specifically include the first diode
It is connected with the power device with the anode of the first triode, first diode, the cathode ground connection of first diode,
The emitter of first triode is grounded, and the collector of first triode is connected with the control module；Wherein, in institute
When stating display screen and being in the standby mode, the light that first diode is sent out weakens so that first triode
Collector current weakens, to generate the feedback signal and be sent to the control module.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages：
1, come as a result of flyback driving chip while realizing power factor controlling function and idle function, it is possible to
Power frequency supply after rectification is converted without power frequency electrolytic capacitor directly to circuit of reversed excitation power supply so that the system of power supply
Framework very simple, corresponding system cost also decrease.
2, reflect the loading condition of circuit output end as a result of feedback module, if the load reduction of output end,
Feedback module generates feedback signal to control module, and control module controls the output power drop of conversion module based on feedback signal
It is low, low-power consumption target when so as to reach standby.
3, since the adjusting unit in control module has frequency jittering function, electromagnetic interference can be reduced（EMI,
Electromagnetic Interference）Peak value when test, passes through Electromagnetic Interference Test.
4, since Multiple coil output may be used in conversion module, conversion module can export all kinds of secondary DC to DC electricity
Source（DC-DC）, including light emitting diode（LED, Light Emitting Diode）Driving, Cold Cathode Fluorescent fluorescent tube (CCFL,
Cold Cathode Fluorescent Lamp）Driving or other drivings etc..
Description of the drawings
Fig. 1 is the system architecture diagram of the application power supply in the prior art；
Fig. 2 is the method for supplying power to flow chart provided in one embodiment of the application；
Fig. 3 is the Organization Chart of the power supply circuit provided in one embodiment of the application；
Fig. 4 is the functional block diagram of the electronic equipment provided in one embodiment of the application；
Fig. 5 is the first voltage oscillogram handled through over commutation provided in one embodiment of the application；
Fig. 6 is the circuit diagram of the power supply circuit provided in one embodiment of the application.
Specific implementation mode
The embodiment of the present application solves in the prior art by a kind of method of supplying power to of offer, power supply circuit and electronic equipment
The technical problem of the system architecture complexity of power supply.
Technical solution in the embodiment of the present application is the technical problem for the system architecture complexity for solving above-mentioned power supply, overall to think
Road is as follows：
Power factor controlling function and idle function are realized by using circuit of reversed excitation simultaneously, it is possible to after rectification
Power frequency supply is converted without power frequency electrolytic capacitor and directly to circuit of reversed excitation power supply so that the system architecture of power supply is very simple
It is single.
In order to make the application the technical staff in the technical field be more clearly understood that the application, below in conjunction with the accompanying drawings,
Technical scheme is described in detail by specific embodiment.
Embodiment one：
It the present embodiment provides a kind of method of supplying power to, applies on an electronic equipment, electronic equipment includes at least working condition
And standby mode, as shown in Fig. 2, Fig. 2 is the flow chart of method of supplying power to provided in this embodiment, this method includes：
Step S1：Obtain an input voltage；
Step S2：Rectification processing is carried out to input voltage, obtains first voltage；
Step S3：When electronic equipment is in running order, first voltage is turned by the power supply circuit in electronic equipment
It is changed at least one output voltage at least one electricity consumption module for being input to electronic equipment；It is in standby in electronic equipment
When, control power supply circuit is in standby mode.
The present embodiment provides a kind of power supply circuits, as shown in figure 3, Fig. 3 is the framework of power supply circuit provided in this embodiment
Figure, the power supply circuit are connect with the rectification module in an electronic equipment, and electronic equipment includes working condition and standby mode, power supply
Circuit includes：Control module 301, is connected with rectification module；Conversion module 302 is connected with control module 301, is used for rectification
The operating voltage that module provides 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 standby, feedback module 304 generates a feedback letter
Number and be sent to control module 301, the output power that control module 301 controls conversion module 302 based on feedback signal reduces, from
And power supply circuit is made to enter standby mode.
The present embodiment also provides a kind of electronic equipment, referring to FIG. 4, Fig. 4 is the work(of electronic equipment provided in this embodiment
Energy module map, electronic equipment include：Display screen 401, including operating mode and standby mode；Mainboard 402, with 401 phase of display screen
Even；Rectification module 403, for converting input voltage into operating voltage；Power supply circuit 404, the input terminal of power supply circuit with it is whole
Flow module is connected, and the output end of output circuit is connected with display screen and mainboard respectively, when display screen is in operating mode, power supply
The first output voltage of circuit output and the second output voltage, the first output voltage are used for mainboard, and the second output voltage is for display
Screen uses, and when display screen is in standby mode, power supply circuit exports the first output voltage, is used for mainboard.
Below in conjunction with Fig. 3, Fig. 3 and Fig. 4, the specific implementation process to the method for supplying power to of the offer in embodiment one and confession
Circuit, electronic equipment concrete operating principle describe in detail.
Method of supplying power to provided in this embodiment can be applied in above-mentioned power supply circuit and electronic equipment, in following description
In, it will be by taking electronic equipment be LCD TV as an example, to be described in detail.
A kind of method of supplying power to provided in this embodiment, is applied on an electronic equipment, and electronic equipment includes at least work shape
State and standby mode, including step：
Step S1：Obtain an input voltage.
Specifically, in the present embodiment, S1 is specially：The input voltage for LCD TV operation is obtained, in reality
Can power to LCD TV so that LCD TV can be run in.
In a particular application, that is, to rectification module shown in Fig. 3 it powers, while being also to be set to electronics shown in Fig. 4
Rectification module 403 in standby is powered.
Step S2：Rectification processing is carried out to input voltage, obtains first voltage.
Specifically, in the present embodiment, S2 is specially：Input voltage is carried out by the rectification module in LCD TV
Rectification is handled, and obtains first voltage, in practical applications, can carry out rectification processing to the alternating current of input, be passed through
Treated pulsating dc voltage.
In a particular application, the waveform of pulsating dc voltage can be oscillogram as shown in Figure 5, herein Rectified alternating current
The oscillogram of pressure be rectification module be bridge rectifier when oscillogram, herein the oscillogram of pulsating dc voltage be commonly called as " steamed bun
Wave ", those skilled in the art are apparent from, by different rectifier systems get the oscillogram of pulsating dc voltage is
Different, those skilled in the art can select suitable rectification processing mode, such as according to the needs of actual conditions
Halfwave rectifier, full-wave rectification etc..
Step S3：When electronic equipment is in running order, first voltage is turned by the power supply circuit in electronic equipment
It is changed at least one output voltage at least one electricity consumption module for being input to electronic equipment；It is in standby in electronic equipment
When, control power supply circuit is in standby mode.
Specifically, when electronic equipment is in running order, by the power supply circuit in electronic equipment by first voltage
At least one output voltage at least one electricity consumption module for being input to electronic equipment is converted to, that is, is carried through this embodiment
First voltage is converted to and is input at least one of LCD TV electricity consumption mould by the conversion module 302 in the power supply circuit of confession
At least one input voltage of block can be converted to first voltage needed for the display screen of LCD TV in the present embodiment
The required voltage of voltage and mainboard wanted.
In the present embodiment, as shown in figure 3, power supply circuit specifically includes：Control module 301, is connected with rectification module；Turn
Block 302 is changed the mold, is connected with control module 301, the operating voltage for providing rectification module is converted to can be in electronic device
The output voltage that at least one electricity consumption module 303 uses；Feedback module 304, is connected with control module.
Referring to FIG. 6, Fig. 6 is the circuit diagram of the power supply circuit provided in the present embodiment, control module 301 may include：
First pin of flyback driving chip, flyback driving chip is connected by first resistor with rectification module, flyback driving chip
Second pin is connected by second resistance with rectification module, and the third pin of flyback driving chip is connected with feedback module, flyback
The ground pin of driving chip is grounded, and the 4th pin of flyback driving chip is connected with conversion module；Adjust unit, including first
Pin, second pin and third pin, wherein the first pin is connected with the 5th pin of flyback driving chip, second pin with
Conversion module is connected, and third pin is connected with the 6th pin of flyback driving chip.
In the concrete application of the present embodiment, flyback driving chip can be specifically N800 chips, the first of N800 chips
Pin can be HV pins, and HV pins can be connected with rectification module, and the second pin can be AC pins, AC pins can with it is whole
Flow module is connected, and third pin can be FB pins, and FB pins can be connected with feedback module 304, and the 4th pin can be VCC
Power pin, VCC pins can be connected with conversion module 302, and it can be specifically metal oxide layer-semiconductor-field to adjust unit
Imitate transistor（MOSFET, Metal-Oxide-Semiconductor Field-Effect Transistor）, the metal-oxygen
It includes 3 pins to change layer-semiconductor-field-effect transistor, is three electricity of metal oxide layer-semiconductor-field-effect transistor respectively
Pole：G (grid), S (source electrode) and D (drain electrode), wherein the poles G are connected with the 5th pin DRV pins of N800, the poles D and conversion module
302 are connected, and the poles S are connected with the 6th pin CS pins of N800 chips, and in a particular application, metal-oxide-semiconductor drain electrode can be in voltage waveform
Valley conduction, with reduce MOS and pay side diode Wen Sheng, improve efficiency.It of courses, in practical applications, this field
Those of ordinary skill can also select other electronic devices with said function to combine to replace this implementation according to actual conditions
The control module introduced in example.
Above-mentioned detailed composition that is detailed and clearly illustrating control module 301, next introduces the detailed of conversion module 302
It is thin to constitute, with continued reference to FIG. 6, conversion module 302 can be specifically a transformer T800 includes：First primary coil, the
The first end of one primary coil is connected with control module 301, the second end ground connection of the first primary coil；Second primary coil, the
The first end of two primary coils is connected with rectification module, and the second end of the second primary coil is connected with control module 301；For the first time
Grade coil, the first end ground connection of the first secondary coil, the second end of the first secondary coil are connected with the first output interface；Second
Grade coil, the first end of second subprime coil are connected with the second output interface, the second end and feedback module of second subprime coil
304 are connected.In the present embodiment, the coil design that conversion module 302 uses can export the display screen demand of LCD TV
Voltage, audio power amplifier demand voltage, standby and mainboard demand voltage, in practical applications, those skilled in the art are also
Output voltage can be adjusted to meet the output voltage of actual needs according to actual conditions.
Above clearly illustrate the detailed composition of conversion module 302 in detail, in detail below introduce feedback module
304 detailed composition, with continued reference to FIG. 6, feedback module 304 is specially photoelectrical coupler, including：First diode and first
The anode of triode, the first diode is connected at least one electricity consumption module, the cathode ground connection of the first diode, the first triode
Emitter ground connection, the collector of the first triode is connected with control module 301, wherein is in standby in electronic equipment
When, the light that the first diode is sent out weakens so that the collector current of the first triode weakens, to generate feedback signal simultaneously
It is sent to control module 301.Of course, those skilled in the art the concrete function for having understood feedback module 304 with
Afterwards, feedback module 304 can also be replaced using other electronic components with said function according to actual conditions.
Above-mentioned part describes control module 301, the detailed composition of conversion module 302, feedback module 304 in detail respectively,
Control module 301, the specific engagement process of conversion module 302, feedback module 304 is described below.
With continued reference to FIG. 6, the input variable of the N800 chips in control module 301 may include：Power frequency input, power frequency
The feed back input of steamed bun wave sampling input and late-class circuit, power supply circuit provided in this embodiment realizes PFC functions, and there are two types of sides
Method：
The first, as reference using the steamed bun wave after industrial frequency rectifying, this steamed bun wave passes through N800 chips to this circuit of reversed excitation
Calculation process after peak level signal as current-mode control, be still same-phase synchronous with the sine wave of input just
String steamed bun wave, each current peak for flowing through flyback transformer are limited by it；In this way, the envelope of current waveform is as and defeated
Enter sine wave of the AC synchronous with phase, to realize PFC.
Second, due to flowing through electric current I=U*ton/L of transformer T800, wherein ton be switch connect every time when
Between, L is the inductance of transformer T800, and after transformer T800 is designed, L is a fixed value, if keeping each switch
The MOS turn-on times ton in period is constant, then electric current I is just only related with input voltage U；And without electrolysis electricity after this circuit rectifies
Hold, so voltage U is still a sinusoidal steamed bun wave, control loop design makes the high frequency within the time of a power frequency period
The turn-on time of switch is constant so that input current waveform follows input voltage waveform naturally, to realize power factor school
Just.
In S3, method further includes, and when electronic equipment is in standby, control power supply circuit is in standby mode,
Specifically, it can refer to the load reduction of the output end of power supply circuit when electronic equipment is in standby, that is, use
The power of electric module 303 reduces, then the feedback module 304 of power supply circuit generates feedback signal to control module 301, control module
301 output powers for controlling conversion module 302 based on feedback signal reduce, so as to reach when LCD TV is in standby
Low-power consumption target.
Specifically, the N800 chips in control module 301 also have the function of frequency hopping, and the FB pins of N800 chips can
The feedback information of the transmission of feedback module 304 is got, the output power of control transformer T800 reduces, such as in transformer T800
The electricity consumption module of output end when being in standby, the current decay of the first diode in feedback module 304 is flowed through, so
The light that one diode is sent out weakens, so that collector current weakens in the first triode in feedback module 304, to
The N800 chips for generating feedback signal and being sent in control module 301, N800 chips control metal-oxide according to feedback signal
The turn-on time of layer-semiconductor-field-effect transistor has reached to reduce the output power of conversion module 302 at LCD TV
In the low-power consumption target of standby mode.
The embodiment of the present application one provides a kind of power supply circuit, is connect with the rectification module in an electronic equipment, electronic equipment
Including working condition and standby mode, power supply circuit specifically includes：Control module 301, is connected with rectification module；Conversion module
302, it is connected with control module, the operating voltage for providing rectification module is converted to can at least one use in electronic device
The output voltage that electric module 303 uses；Feedback module 304 is connected with control module 301；Wherein, it is in standby in electronic equipment
When state, feedback module 304 generates a feedback signal and is sent to control module 301, and control module 301 is controlled based on feedback signal
The output power of voltage transformation module 302 processed reduces, so that power supply circuit enters standby mode.
In the present embodiment, control module specifically includes：Flyback driving chip, the first pin of flyback driving chip pass through
One resistance is connected with rectification module, and the second pin of flyback driving chip is connected by second resistance with rectification module, and flyback is driven
The third pin of dynamic chip is connected with feedback module, the ground pin ground connection of flyback driving chip, and the 4th of flyback driving chip the
Pin is connected with conversion module；Adjust unit, including the first pin, second pin and third pin, wherein the first pin with it is anti-
The 5th pin for swashing driving chip is connected, and second pin is connected with conversion module, third pin and the 6th of flyback driving chip
Pin is connected.
In the present embodiment, conversion module specifically includes：First primary coil, the first end of first primary coil
It is connected with the control module, the second end ground connection of first primary coil；Second primary coil, second primary coil
First be connected with the rectification module, the second end of second primary coil is connected with the control module；First grade
Coil, the first end ground connection of first secondary coil, the second end of first secondary coil are connected with the first output interface；
The first end of second subprime coil, the second subprime coil is connected with the second output interface, and the of the second subprime coil
Two ends are connected with the feedback module.
In the present embodiment, feedback module is specially：Photoelectrical coupler, photoelectrical coupler specifically include the first diode with
The anode of first triode, the first diode is connected at least one electricity consumption module, the cathode ground connection of the first diode, and the one or three
The emitter of pole pipe is grounded, and the collector of the first triode is connected with control module；Wherein, it is in standby in electronic equipment
When, the light that the first diode is sent out weakens so that the collector current of the first triode weakens, to generate feedback signal simultaneously
It is sent to control module.
Concrete structure due to having been combined power supply circuit in the part of preceding description method is described in detail, so
In order to illustrate the succinct of book, details are not described herein again.
The embodiment of the present application provides a kind of electronic equipment, and electronic equipment includes：Display screen, including operating mode and standby mould
Formula；Mainboard is connected with display screen；Rectification module, for converting input voltage into operating voltage；Power supply circuit, supply current
Input terminal be connected with rectification module, the output end of output circuit is connected with display screen and mainboard respectively, and work is in display screen
When operation mode, power supply circuit exports the first output voltage and the second output voltage, and the first output voltage is used for mainboard, and second is defeated
Go out voltage to use for display screen, when display screen is in standby mode, power supply circuit exports the first output voltage, for mainboard makes
With.
In the present embodiment, power supply circuit includes：Control module is connected with rectification module；Conversion module, with control module
It is connected, for operating voltage to be converted to the first output voltage and the second output voltage；Feedback module is connected with control module；
Wherein, when electronic equipment is in standby, feedback module generates a feedback signal and is sent to control module, control module
Controlling the output power of conversion module reduces, so that power supply circuit enters standby mode.
In the present embodiment, control module specifically includes：Flyback driving chip, the first pin of flyback driving chip pass through
One resistance is connected with rectification module, and the second pin of flyback driving chip is connected by second resistance with rectification module, and flyback is driven
The third pin of dynamic chip is connected with feedback module, the ground pin ground connection of flyback driving chip, and the 4th of flyback driving chip the
Pin is connected with conversion module；Adjust unit, including the first pin, second pin and third pin, wherein the first pin with it is anti-
The 5th pin for swashing driving chip is connected, and second pin is connected with conversion module, third pin and the 6th of flyback driving chip
Pin is connected.
In the present embodiment, conversion module specifically includes：First primary coil, the first end of first primary coil with
The control module is connected, the second end ground connection of first primary coil；Second primary coil, second primary coil
First is connected with the rectification module, and the second end of second primary coil is connected with the control module；First secondary wire
Circle, the first end ground connection of first secondary coil, the second end of first secondary coil are connected with the first output interface；The
The first end of secondary stage coil, the second subprime coil is connected with the second output interface, and the second of the second subprime coil
End is connected with the feedback module.
In the present embodiment, feedback module is specially：Photoelectrical coupler, photoelectrical coupler specifically include the first diode with
The anode of first triode, the first diode is connected with power device, the cathode ground connection of the first diode, the hair of the first triode
The collector of emitter grounding, the first triode is connected with control module；Wherein, when display screen is in standby, the one or two
The light that pole pipe is sent out weakens so that the collector current of the first triode weakens, to generate feedback signal and be sent to control
Molding block.
The power supply circuit provided by the power supply circuit in electronic equipment in this present embodiment, that is, preceding sections embodiment,
The preceding detailed construction for having described power supply circuit in detail and carrying out practically process, so in order to illustrate the succinct of book, herein
It repeats no more.
Technical solution in above-mentioned the embodiment of the present application, at least has the following technical effect that or advantage：
1, come as a result of flyback driving chip while realizing power factor controlling function and idle function, it is possible to
Power frequency supply after rectification is converted without power frequency electrolytic capacitor directly to circuit of reversed excitation power supply so that the system of power supply
Framework very simple, corresponding system cost also decrease.
2, reflect the loading condition of circuit output end as a result of feedback module, if the load reduction of output end,
Feedback module generates feedback signal to control module, and control module controls the output power drop of conversion module based on feedback signal
It is low, low-power consumption target when so as to reach standby.
3, since the adjusting unit in control module has frequency jittering function, electromagnetic interference can be reduced（EMI,
Electromagnetic Interference）Peak value when test, passes through Electromagnetic Interference Test.
4, since Multiple coil output may be used in conversion module, conversion module can export all kinds of secondary DC to DC electricity
Source（DC-DC）, including light emitting diode（LED, Light Emitting Diode）Driving, Cold Cathode Fluorescent fluorescent tube (CCFL,
Cold Cathode Fluorescent Lamp）Driving or other drivings etc..
Obviously, those skilled in the art can carry out the application essence of the various modification and variations without departing from the application
God and range.In this way, if these modifications and variations of the application belong to the range of the application claim and its equivalent technologies
Within, then the application is also intended to include these modifications and variations.
Claims (6)
1. a kind of power supply circuit is connect with the rectification module in an electronic equipment, which is characterized in that the power supply circuit includes：
Capacitance, the capacitance is in parallel with the rectification module, and the capacitance is non-electrolytic capacitor；
Control module is connected with the rectification module, and the control module specifically includes：Flyback driving chip, the flyback are driven
Dynamic chip the first pin HV pins are connected by first resistor with the rectification module, the second pin of the flyback driving chip
AC pins are connected by second resistance with the rectification module, third pin FB pins and the feedback mould of the flyback driving chip
Block is connected, the ground pin of flyback driving chip ground connection, the 4th pin VCC power pins of the flyback driving chip with
Conversion module is connected；
Adjust unit, including the first pin, second pin and third pin, wherein first pin drives with the flyback
5th pin DRV pins of chip are connected, and the second pin is connected with the conversion module, the third pin and it is described instead
The 6th pin CS pins for swashing driving chip are connected；
Wherein, the input variable of the flyback driving chip includes：Power frequency input, power frequency steamed bun wave sampling input and late-class circuit
Feed back input, the conversion module be a transformer, and the electric current of the transformer be I=U*ton/L, wherein ton be open
It closes the time connected every time, L is the inductance of transformer, and U is input voltage；
Conversion module is connected with the control module, and the operating voltage for providing rectification module is converted to for the electricity
The output voltage that at least one electricity consumption module uses in sub- equipment；
Feedback module is connected with the control module.
2. power supply circuit as described in claim 1, which is characterized in that the conversion module specifically includes：
The first end of first primary coil, first primary coil is connected with the control module, first primary coil
Second end ground connection；
The first end of second primary coil, second primary coil is connected with the rectification module, second primary coil
Second end be connected with the control module；
First secondary coil, the first end ground connection of first secondary coil, the second end and first of first secondary coil
Output interface is connected；
The first end of second subprime coil, the second subprime coil is connected with the second output interface, the second subprime coil
Second end be connected with the feedback module.
3. power supply circuit as described in claim 1, which is characterized in that the feedback module is specially：
Photoelectrical coupler, the photoelectrical coupler specifically include the first diode and the first triode, first diode
It is positive to be connected at least one electricity consumption module, the cathode ground connection of first diode, the transmitting of first triode
Pole is grounded, and the collector of first triode is connected with the control module；
Wherein, when the electronic equipment is in standby, light that first diode is sent out weakens so that described the
The collector current of one triode weakens, to generate feedback signal and be sent to the control module, the control module base
The output power of the conversion module is controlled in the feedback signal to be reduced, so that the power supply circuit enters standby mould
Formula.
4. a kind of electronic equipment, which is characterized in that the electronic equipment includes：
Display screen；
Mainboard is connected with the display screen；
Rectification module, for converting input voltage into operating voltage；
Power supply circuit, the input terminal of the power supply circuit are connected with the rectification module, the output end of output circuit respectively with institute
It states display screen with the mainboard to be connected, in operating mode, the power supply circuit exports the first output voltage and the second output electricity
Pressure, first output voltage are used for the mainboard, and second output voltage is used for the display screen, in standby mode
When, the power supply circuit exports first output voltage, is used for the mainboard；
Wherein, the power supply circuit includes：
Capacitance, the capacitance is in parallel with the rectification module, and the capacitance is non-electrolytic capacitor；
Control module is connected with the rectification module, and the control module specifically includes：Flyback driving chip, the flyback are driven
Dynamic chip the first pin HV pins are connected by first resistor with the rectification module, the second pin of the flyback driving chip
AC pins are connected by second resistance with the rectification module, third pin FB pins and the feedback mould of the flyback driving chip
Block is connected, the ground pin of flyback driving chip ground connection, the 4th pin VCC power pins of the flyback driving chip with
Conversion module is connected；
Adjust unit, including the first pin, second pin and third pin, wherein first pin drives with the flyback
5th pin DRV pins of chip are connected, and the second pin is connected with the conversion module, the third pin and it is described instead
The 6th pin CS pins for swashing driving chip are connected；
Wherein, the input variable of the flyback driving chip includes：Power frequency input, power frequency steamed bun wave sampling input and late-class circuit
Feed back input, the conversion module be a transformer, and the electric current of the transformer be I=U*ton/L, wherein ton be open
It closes the time connected every time, L is the inductance of transformer, and U is input voltage；
Conversion module is connected with the control module, for the operating voltage to be converted to first output voltage and institute
State the second output voltage；
Feedback module is connected with the control module.
5. electronic equipment as claimed in claim 4, which is characterized in that the conversion module specifically includes：
The first end of first primary coil, first primary coil is connected with the control module, first primary coil
Second end ground connection；
The first end of second primary coil, second primary coil is connected with the rectification module, second primary coil
Second end be connected with the control module；
First secondary coil, the first end ground connection of first secondary coil, the second end and first of first secondary coil
Output interface is connected；
The first end of second subprime coil, the second subprime coil is connected with the second output interface, the second subprime coil
Second end be connected with the feedback module.
6. electronic equipment as claimed in claim 4, which is characterized in that the feedback module is specially：
Photoelectrical coupler, the photoelectrical coupler specifically include the first diode and the first triode, first diode
Anode is connected with power device, and the cathode of first diode is grounded, and the emitter of first triode is grounded, and described the
The collector of one triode is connected with the control module；
Wherein, when the display screen is in standby, the light that first diode is sent out weakens so that described first
The collector current of triode weakens, and to generate feedback signal and be sent to the control module, the control module is based on
The output power that the feedback signal controls the conversion module reduces, so that the power supply circuit enters standby mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510438459.4A CN105099202B (en) | 2012-06-25 | 2012-06-25 | A kind of method of supplying power to, power supply circuit and electronic equipment |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210210990.2A Division CN102739061B (en) | 2012-06-25 | 2012-06-25 | Power supply method, power supply circuit and electronic equipment |
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| Publication Number | Publication Date |
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| CN105099202A CN105099202A (en) | 2015-11-25 |
| CN105099202B true CN105099202B (en) | 2018-11-02 |
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| CN201210210990.2A Active CN102739061B (en) | 2012-06-25 | 2012-06-25 | Power supply method, power supply circuit and electronic equipment |
| CN201510438459.4A Active 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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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN113437792A (en) * | 2019-12-13 | 2021-09-24 | 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 |
|---|---|
| CN102739061A (en) | 2012-10-17 |
| CN102739061B (en) | 2015-07-01 |
| CN105099202A (en) | 2015-11-25 |
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Address after: 266100 Zhuzhou Road, Laoshan District, Shandong, No. 151, No. Patentee after: Hisense Visual Technology Co., Ltd. Address before: 266100 Zhuzhou Road, Laoshan District, Shandong, No. 151, No. Patentee before: QINGDAO HISENSE ELECTRONICS Co.,Ltd. |