CN108448877A - A kind of communication means of Switching Power Supply and its secondary side to primary side - Google Patents

A kind of communication means of Switching Power Supply and its secondary side to primary side Download PDF

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Publication number
CN108448877A
CN108448877A CN201810293178.8A CN201810293178A CN108448877A CN 108448877 A CN108448877 A CN 108448877A CN 201810293178 A CN201810293178 A CN 201810293178A CN 108448877 A CN108448877 A CN 108448877A
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CN
China
Prior art keywords
power supply
switching power
controller
coupled
encoded signal
Prior art date
Application number
CN201810293178.8A
Other languages
Chinese (zh)
Inventor
陈超
汪虎
谢宜忠
张美玲
彭灯明
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上海新进半导体制造有限公司
上海新进芯微电子有限公司
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Application filed by 上海新进半导体制造有限公司, 上海新进芯微电子有限公司 filed Critical 上海新进半导体制造有限公司
Priority to CN201810293178.8A priority Critical patent/CN108448877A/en
Publication of CN108448877A publication Critical patent/CN108448877A/en

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00Details of apparatus for conversion
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00Conversion of dc power input into dc power output
    • H02M3/22Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33569Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
    • H02M3/33576Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00Details of apparatus for conversion
    • H02M2001/0003Details of control, feedback and regulation circuits
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00Details of apparatus for conversion
    • H02M2001/0003Details of control, feedback and regulation circuits
    • H02M2001/0016Control circuits providing compensation of output voltage deviations using feedforward of disturbance parameter
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00Details of apparatus for conversion
    • H02M2001/0003Details of control, feedback and regulation circuits
    • H02M2001/0016Control circuits providing compensation of output voltage deviations using feedforward of disturbance parameter
    • H02M2001/0019Control circuits providing compensation of output voltage deviations using feedforward of disturbance parameter the disturbance parameter being load current fluctuations

Abstract

This application discloses a kind of Switching Power Supplies, including:The transformer that primary side winding is coupled with the input stage of Switching Power Supply, vice-side winding is coupled with load circuit and auxiliary winding is coupled with feedback terminal;The first controller coupled with vice-side winding;The second controller and power switch coupled with primary side winding;The feedback terminal coupled with second controller;First controller is used to obtain the feedback information on Switching Power Supply pair side;And encode feedback information according to pre-arranged code rule, encoded signal is sent by vice-side winding in the dead time of Switching Power Supply;Feedback terminal is used to pass through auxiliary winding received encoded signal;Second controller is generated corresponding control signal and is switched with driving power for being decoded to encoded signal to obtain feedback information.The application avoids the use of optic coupling element, and cost and design difficulty are low.Disclosed herein as well is a kind of secondary sides in Switching Power Supply to the communication means of primary side, it may have above-mentioned advantageous effect.

Description

A kind of communication means of Switching Power Supply and its secondary side to primary side

Technical field

This application involves switch power technology field, more particularly to the communication party on a kind of Switching Power Supply and its secondary side to primary side Method.

Background technology

Switching Power Supply is the common device in modern power electronics technology, has obtained answering extensively in the production and living of the mankind With.

It is specifically the output and adjusting that voltage is realized using transformer in Switching Power Supply.Stable output electricity in order to obtain Pressure is generally used primary side feedback (Primary Side Regulate, PSR) inverse-excitation type technology by the output detected electricity Pressure feeds back to primary side and is controlled to adjust.

However, the development of progress and the user demand with the relevant technologies, in practical applications, the letter fed back It is more and more to cease content:On the basis of the output voltage that script is fed back, it can also further increase required for load in real time Voltage or the other informations such as electric current, to optimize the output control of Switching Power Supply as much as possible, such as its output power can be made It is adjusted in real time with the charging situation of load.For these information, it is also desirable to a set of effective method so as to by its The primary side side of Switching Power Supply is fed back to, although the method for forming feedback network by optocoupler of the addition with isolation effect can To solve the problems, such as this, but the complexity of equipment cost and space layout can be undoubtedly improved, be unfavorable for the miniaturization of equipment.

It can be seen that using the Switching Power Supply of which kind of low cost, to need feedack from secondary side feedback by various To primary side, and arrangement space is saved simultaneously and then reduces design difficulty, be the important skill solved required for those skilled in the art Art problem.

Invention content

The application's is designed to provide a kind of Switching Power Supply of low cost, and secondary side is to the communication means of primary side, with Just it needs feedack from secondary side feedback to primary side by various, and saves arrangement space simultaneously and then reduce design difficulty.

In order to solve the above technical problems, this application provides a kind of Switching Power Supplies, including:

Transformer has the primary side winding coupled with the input stage of the Switching Power Supply, the secondary side coupled with load circuit Winding and the auxiliary winding coupled with feedback terminal;

The first controller coupled with the vice-side winding;

The second controller and power switch coupled with the primary side winding;

The feedback terminal coupled with the second controller;

First controller is used to obtain the feedback information on Switching Power Supply pair side;And it will according to pre-arranged code rule The feedback information is encoded, and encoded signal is sent by the vice-side winding in the dead time of the Switching Power Supply;

The feedback terminal is used to receive the encoded signal by the auxiliary winding;

The second controller generates corresponding for being decoded to the encoded signal to obtain the feedback information Control signal to drive the power switch.

Optionally, the feedback information includes following any one or arbitrary combination:

Current value, cut-off signals, Restart Signal needed for voltage value, load needed for load.

Optionally,

The dead time follows after the secondary side turn-on time of the Switching Power Supply, and the secondary side of the Switching Power Supply is led The logical time follows after the primary side turn-on time of the Switching Power Supply.

Optionally, in the dead time and the secondary side turn-on time, the power switch cut-off.

Optionally, the pre-arranged code rule is binary coding rule.

Optionally, first controller is specifically used for:

In the dead time of the Switching Power Supply, according to the encoded signal by turn to the vice-side winding input pulse Signal;The signal frequency of the pulse signal is related to the size of data of encoded signal corresponding data position.

Optionally, first controller is specifically used for:

In the dead time of the Switching Power Supply, according to the encoded signal by turn to the vice-side winding input pulse Signal;The pulse width of the pulse signal is related to the size of data of encoded signal corresponding data position.

Optionally, first controller is specifically used for:

According to the break-make for the controlled tr tube that the encoded signal cascade control is coupled with the vice-side winding, so as to institute It states vice-side winding and inputs the pulse signal;The controlled tr tube is being closed the season vice-side winding formation current path.

Optionally, the controlled tr tube is the secondary side rectification metal-oxide-semiconductor coupled with the vice-side winding.

Optionally, the controlled tr tube is in parallel with the secondary side rectification metal-oxide-semiconductor for being coupled in the vice-side winding.

Optionally, first controller is the secondary side commutation controller coupled with the vice-side winding.

Present invention also provides another Switching Power Supplies, including:

Transformer;

Feedback terminal, in the dead time of the Switching Power Supply, coding letter to be received from the secondary side of the transformer Number;

The primary side in the transformer is arranged in detection circuit, for being decoded to the encoded signal, and generates corresponding Control signal;

Driving circuit is coupled with the detection circuit, for the original according to control the signal driving and the transformer The power switch of side coupling.

Optionally, the feedback terminal is coupled with the auxiliary winding of the transformer;

The feedback terminal is specifically used for:

By the auxiliary winding encoded signal is received from the secondary side of the transformer.

Present invention also provides secondary sides in a kind of Switching Power Supply to be applied to and the Switching Power Supply to the communication means of primary side First controller of the vice-side winding coupling of middle transformer, including:

Obtain the feedback information on Switching Power Supply pair side;

The feedback information is encoded according to pre-arranged code rule;

Encoded signal is sent by the vice-side winding in the dead time of the Switching Power Supply;In order to make with the change The feedback terminal of the auxiliary winding coupling of depressor receives the encoded signal by the auxiliary winding, and then enables and the feedback The second controller of terminal coupling is decoded the encoded signal to obtain the feedback information, and generates corresponding control Power switch of the signal to drive the primary side winding with the transformer to couple.

Present invention also provides secondary sides in another Switching Power Supply to the communication means of primary side, is applied to and switch electricity The second controller of the primary side winding coupling of transformer in source, including:

The feedback terminal coupled with the auxiliary winding of the transformer is received to examine in the dead time of the Switching Power Supply The encoded signal measured;Wherein, the encoded signal is that the first controller coupled with the vice-side winding of the transformer is obtaining After taking the feedback information on Switching Power Supply pair side and being encoded according to pre-arranged code rule, sent out by the vice-side winding The encoded signal sent;

The encoded signal is decoded to obtain the feedback information;

Generate power switch of the corresponding control signal to drive the primary side winding with the transformer to couple.

Switching Power Supply provided herein includes:Transformer has the original coupled with the input stage of the Switching Power Supply Side winding, the vice-side winding coupled with load circuit and the auxiliary winding coupled with feedback terminal;With the vice-side winding coupling The first controller closed;The second controller and power switch coupled with the primary side winding;It is coupled with the second controller The feedback terminal;Wherein, first controller is used to obtain the feedback information on Switching Power Supply pair side;And according to pre- If coding rule encodes the feedback information, sent out by the vice-side winding in the dead time of the Switching Power Supply Send encoded signal;The feedback terminal is used to receive the encoded signal by the auxiliary winding;The second controller is used In being decoded to the encoded signal to obtain the feedback information, and corresponding control signal is generated to drive the power Switch.

As it can be seen that compared with the prior art, Switching Power Supply provided herein passes through the dead time in Switching Power Supply It is interior, the encoded signal that feedback information encodes is sent using vice-side winding by the first controller of secondary avris, and by The second controller of primary side side is decoded the encoded signal that feedback terminal receives, and completes feedback information by secondary side to primary side Feedback procedure, and then scientific and effective adjusting can be carried out to the output of Switching Power Supply using feedback information.Due to the application It avoids having used light-coupled isolation device, therefore not only without increasing equipment cost, but also also saves device layout space, reduce Design difficulty.The communication means of secondary side to primary side equally has above-mentioned advantageous effect in Switching Power Supply provided herein.

Description of the drawings

In order to illustrate more clearly of the technical solution in the prior art and the embodiment of the present application, below will to the prior art and Attached drawing to be used is needed to make brief introduction in the embodiment of the present application description.Certainly, the attached drawing in relation to the embodiment of the present application below A part of the embodiment in only the application of description is not paying creativeness to those skilled in the art Under the premise of labour, other attached drawings can also be obtained according to the attached drawing of offer, the other accompanying drawings obtained also belong to the application Protection domain.

A kind of circuit structure diagram for Switching Power Supply that Fig. 1 is provided by the embodiment of the present application;

A kind of oscillogram for the feedback voltage in Switching Power Supply work period that Fig. 2 is provided by the embodiment of the present application;

The signal waveforms that secondary side is communicated to primary side in a kind of dead time that Fig. 3 is provided by the embodiment of the present application;

The signal waveforms that secondary side is communicated to primary side in another dead time that Fig. 4 is provided by the embodiment of the present application;

The circuit structure diagram for another Switching Power Supply that Fig. 5 is provided by the embodiment of the present application;

The circuit structure diagram for another Switching Power Supply that Fig. 6 is provided by the embodiment of the present application;

The flow chart of primary side feedback method in a kind of Switching Power Supply that Fig. 7 is provided by the embodiment of the present application;

The flow chart of primary side feedback method in another Switching Power Supply that Fig. 8 is provided by the embodiment of the present application.

Specific implementation mode

The core of the application be to provide a kind of low cost Switching Power Supply and its secondary side to primary side communication means, so as to It needs feedack from secondary side feedback to primary side by various, and saves arrangement space simultaneously and then reduce design difficulty.

In order to which technical solutions in the embodiments of the present application is more clearly and completely described, below in conjunction with this Shen Attached drawing that please be in embodiment, technical solutions in the embodiments of the present application are introduced.Obviously, described embodiment is only Some embodiments of the present application, instead of all the embodiments.Based on the embodiment in the application, those of ordinary skill in the art The every other embodiment obtained without making creative work, shall fall in the protection scope of this application.

Referring to FIG. 1, a kind of circuit structure diagram for Switching Power Supply that Fig. 1 is provided by the embodiment of the present application, includes mainly:

Transformer T, have the primary side winding L1 coupled with the input stage of Switching Power Supply, the secondary side that is coupled with load circuit around The group L2 and auxiliary winding L3 coupled with feedback terminal;

The first controller coupled with vice-side winding L2;

With the primary side winding L1 second controllers coupled and power switch S;

The feedback terminal coupled with second controller;

First controller is used to obtain the feedback information on Switching Power Supply pair side;And according to pre-arranged code rule by feedback information It is encoded, encoded signal is sent by vice-side winding L2 in the dead time of Switching Power Supply;

Feedback terminal is used to pass through auxiliary winding L3 received encoded signals;

Second controller for being decoded to encoded signal to obtain feedback information, and generate corresponding control signal with Driving power switch S.

Specifically, it is specifically using devices, the Switching Power Supplies that the embodiment of the present application is provided such as optocouplers in order to avoid increasing Using the first controller coupled with vice-side winding L2 come carry out feedback information transmission and using feedback terminal and with primary side around The second controller of L1 couplings is organized to carry out the reception of feedback information.

As previously mentioned, feedback information mentioned here can be the various information for needing to feed back to primary side.As a kind of excellent Embodiment, feedback information is selected to can specifically include but be not limited to following any one or arbitrary combination:Voltage value needed for load, Current value, cut-off signals, Restart Signal needed for load.Certainly, those skilled in the art can also according to practical situations and Demand voluntarily selects some other feedback information and realization is arranged, and this embodiment of the present application is not limited thereto.

Usually, in Switching Power Supply pair avris, the first controller coupled with vice-side winding L2 can pass through load circuit Above-mentioned feedback information is got, still, for mutually isolated secondary avris and primary side side, needs to set certain rule of communication Realize the transmission of feedback information.Specifically, in the Switching Power Supply that the embodiment of the present application is provided, the first controller is being got After described feedback information, feedback information can be encoded according to pre-arranged code rule, to obtain encoded signal, with Just it is sent.

It is easily understood that the encoded signal generated after feedback information is encoded can be advised according to described pre-arranged code It is then decoded again, to restore to obtain the feedback information of script.As for pre-arranged code mentioned here rule, art technology Personnel can voluntarily select and be arranged realization, such as common binary coding etc., the application in Digital Signal Processing can be selected Embodiment is not limited thereto.

As previously mentioned, the feedback procedure of feedback information needs to set certain rule of communication, described rule of communication in addition to Further include how sending and how receiving outside how being encoded including feedback information.In switch electricity provided herein In source, the first controller is specifically the transmission that encoded signal is carried out in the dead time of Switching Power Supply.Usually, switch electricity The work period in source can be divided into three phases, respectively primary side turn-on time, secondary side turn-on time and dead time.

Referring to FIG. 2, the feedback voltage in a kind of Switching Power Supply work period that Fig. 2 is provided by the embodiment of the present application The oscillogram of Vfb.As shown in Fig. 2, described dead time (i.e. " the IIIth stage ") is followed in the conducting of the secondary side of Switching Power Supply Between after (i.e. " the IIth stage "), and the secondary side turn-on time of Switching Power Supply follow Switching Power Supply primary side turn-on time (i.e. " stage i ") after.In dead time, the power switch S cut-offs coupled with primary side winding L1 in Switching Power Supply, so, just In the case of often, the feedback voltage Vfb that feedback terminal is detected by auxiliary winding L3 is in low level state.Therefore, this Shi Ruo utilizes vice-side winding L2 incoming coded signals, will necessarily cause the variation of magnetic flux in transformer T, so that being in originally The feedback voltage Vfb of low level state also generates response, so as to the received encoded signal from feedback voltage Vfb.Moreover, utilizing Dead time carries out the transmission of feedback information, and the normal work to Switching Power Supply in primary side turn-on time can also be avoided to cause It influences.

Using the isolation features of transformer itself, the first controller can be sent by vice-side winding L2 in dead time Encoded signal is transmitted encoded signal, in the form of transformer flux energy so that feedback terminal passes through auxiliary winding L3 Carry out received encoded signal, and sends it to the first controller coupled with feedback terminal.Process with coding is on the contrary, the first control Device processed is decoded encoded signal using described pre-arranged code rule, obtains the feedback information of transmission, therefrom understands switch The correlation circumstance of power supply pair avris load etc., and then corresponding control signal is generated with driving power switch S, to split powered-down The output in source carries out scientific and effective adjusting.

It should be noted that in Switching Power Supply provided herein, various ways may be used in the first control implement body Encoded signal is sent, is led to for example, some switch elements or active device can be utilized to form in vice-side winding L2 electric current Road etc., those skilled in the art can voluntarily select according to practical situations and be arranged realization, the embodiment of the present application to this simultaneously Without limiting.

As it can be seen that in the Switching Power Supply that the embodiment of the present application is provided, by the dead time of Switching Power Supply, by secondary side First controller of side sends the encoded signal that feedback information encodes using vice-side winding L2, and by primary side side Second controller is decoded the encoded signal that feedback terminal receives, and completes feedback of the feedback information by secondary side to primary side Journey, and then scientific and effective adjusting can be carried out to the output of Switching Power Supply using feedback information.Since the application avoids using Light-coupled isolation device, thus not only without increasing equipment cost, but also also save device layout space, it is difficult to reduce design Degree.

Switching Power Supply provided herein, on the basis of the above embodiments:

As a kind of preferred embodiment, pre-arranged code rule is binary coding rule.

Specifically, as previously mentioned, carry out feedback information coding when, first control implement body can be used common two into Coding rule processed transmits feedback information with the digital signal being made of 0 and 1.

As a kind of preferred embodiment, the first controller is specifically used for:

In the dead time of Switching Power Supply, according to encoded signal by turn to vice-side winding L2 input pulse signals;Pulse The signal frequency of signal is related to the size of data of encoded signal corresponding data position.

Specifically, the first controller, specifically can be on vice-side winding L2 when sending encoded signal using vice-side winding L2 Generate a series of pulse signals, wherein each pulse signal corresponds to a data bit of encoded signal, and each pulse signal Signal frequency in other words gap periods can be related to the size of data of corresponding data position.

Referring to FIG. 3, the signal that secondary side is communicated to primary side in a kind of dead time that Fig. 3 is provided by the embodiment of the present application Oscillogram.Wherein, upper column is the oscillogram of pulse signal MDS a series of, and lower column is feedback voltage corresponding with pulse signal MDS The oscillogram of Vfb.

As shown in figure 3, successively there are three bar pulses in pulse signal MDS, wherein the interval time between the first two Interval time between second and third is shorter.Therefore, also successively occur at the time of corresponding in feedback voltage Vfb Cubic response, also, preceding interval time twice is shorter, and second is longer the interval time between third time.Lead to as a result, Spend signal frequency or perhaps interval time, you can realize the identification in encoded signal 0 and 1.And as specially 0 and 1 point Do not set great signal frequency, can voluntarily be selected to be arranged by those skilled in the art, the embodiment of the present application to this and without It limits.

As a kind of preferred embodiment, the first controller is specifically used for:

In the dead time of Switching Power Supply, according to encoded signal by turn to vice-side winding L2 input pulse signals;Pulse The pulse width of signal is related to the size of data of encoded signal corresponding data position.

Similarly, the first controller, specifically can be on vice-side winding L2 when sending encoded signal using vice-side winding L2 Generate a series of pulse signals, wherein each pulse signal corresponds to a data bit of encoded signal, and each pulse signal Pulse width in other words action time can be related to the size of data of corresponding data position.

Referring to FIG. 4, the letter that secondary side is communicated to primary side in another dead time that Fig. 4 is provided by the embodiment of the present application Number oscillogram.Wherein, upper column is the oscillogram of pulse signal MDS a series of, and lower column is feedback corresponding with pulse signal MDS electricity Press the oscillogram of Vfb.

As shown in figure 4, successively there are three bar pulses in pulse signal MDS, wherein the pulse of second bar pulse Width is relatively shorter than the pulse width of first and third bar pulse.Therefore, in feedback voltage Vfb also at the time of corresponding Successively there is cubic response, also, the amplitude of the second secondary response is smaller, and it is larger with the amplitude of third secondary response for the first time. As a result, by the way that different pulse widths or perhaps action time is arranged, you can realize the identification in encoded signal 0 and 1.And Great pulse width is set separately as specially 0 and 1, can voluntarily be selected to be arranged by those skilled in the art, the application is real Example is applied to be not limited thereto.

As a kind of preferred embodiment, the first controller is specifically used for:

According to the break-make for the controlled tr tube Q that encoded signal cascade control is coupled with vice-side winding L2, so as to secondary side around Group L2 input pulse signals;Controlled tr tube Q is being closed seasonal vice-side winding L2 formation current paths.

As previously mentioned, in Switching Power Supply provided herein, the first control implement body can be by switch element come shape At the current path of vice-side winding L2.As shown in Figure 1, the output end of the first controller can be with the control terminal of controlled tr tube Q Connection, to control the break-make of controlled tr tube Q.Wherein, controlled tr tube Q accesses the vice-side winding L2 of transformer T, closes Vice-side winding L2 will be enabled to form the close access of electric current when conjunction.

As a kind of preferred embodiment, controlled tr tube Q is the secondary side rectification metal-oxide-semiconductor coupled with vice-side winding L2.

Specifically, in order to further save components' placement space reduction design difficulty, what the embodiment of the present application was provided In Switching Power Supply, described controlled tr tube Q can be selected specifically to original pair side rectification metal-oxide-semiconductor in Switching Power Supply pair avris, That is, secondary side rectification metal-oxide-semiconductor to be multiplexed with to the controlled tr tube Q for transmitting feedback information.

As a kind of preferred embodiment, controlled tr tube Q be coupled in vice-side winding L2 secondary side rectification metal-oxide-semiconductor mutually simultaneously Connection.

Specifically, since the secondary side rectification metal-oxide-semiconductor in vice-side winding L2 may be the big metal-oxide-semiconductor of some sizes, work( It consumes larger.So in the Switching Power Supply that the embodiment of the present application is provided, the controlled tr tube Q can be that in addition addition is set The smaller pipe of the size set, and be in parallel with secondary side rectification metal-oxide-semiconductor.

Referring to FIG. 5, the circuit structure diagram for another Switching Power Supply that Fig. 5 is provided by the embodiment of the present application.Wherein, it opens It is described secondary side rectification metal-oxide-semiconductor to close pipe G, and the controlled tr tube Q for being used to send coding information is connected in parallel on secondary side rectification metal-oxide-semiconductor The both ends of G.

Similarly, referring to FIG. 6, the circuit structure diagram for another Switching Power Supply that Fig. 6 is provided by the embodiment of the present application. Wherein, it is specifically as follows for sending the controlled tr tube Q of coding information and is connected in parallel on the switching tube at the both ends diode D, and two poles Pipe D is equally accessed in the close access of vice-side winding L2.

Certainly, those skilled in the art can also realize the transmission of encoded signal, the application using other various ways It is not limited thereto.

As a kind of preferred embodiment, the first controller is the secondary side commutation controller coupled with vice-side winding L2.

Similarly, design difficulty is reduced for the purposes of further saving components' placement space, it is described in the application First controller is specifically as follows the secondary side commutation controller of Switching Power Supply pair avris.That is, by secondary side commutation controller in dead zone Time carries out coding and the transmission of feedback information as the first controller.

Certainly, those skilled in the art can not also select secondary side commutation controller, but in addition add other controls Device is dedicated for the transmission of feedback information, and this embodiment of the present application is not limited thereto, and those skilled in the art can be voluntarily It selects and realization is set.

Present invention also provides another Switching Power Supplies, including:

Transformer;

Feedback terminal is used in the dead time of Switching Power Supply, from the secondary side received encoded signal of transformer;

The primary side in transformer is arranged in detection circuit, for being decoded to encoded signal, and generates corresponding control letter Number;

Driving circuit is coupled with detection circuit, for driving the power coupled with the primary side of transformer according to control signal Switch.

On this basis, as a kind of preferred embodiment, feedback terminal is coupled with the auxiliary winding of transformer;

Feedback terminal is specifically used for:

By auxiliary winding from the secondary side received encoded signal of transformer.

As it can be seen that the Switching Power Supply that the embodiment of the present application is provided, is received from secondary side using the dead time of Switching Power Supply and is compiled Code signal, and then pair is realized come the power switch of adjusting control Switching Power Supply primary side side according to the information got after decoding Feedback regulation of the side to primary side.Since what the application utilized is the isolation coupling characteristic of transformer itself, and avoid having used light Coupling element, therefore can effectively save components' placement space and reduce design difficulty and cost.

Referring to FIG. 7, the communication party of secondary side in a kind of Switching Power Supply that Fig. 7 is provided by the embodiment of the present application to primary side The flow chart of method is applied to the first controller coupled with the vice-side winding L2 of transformer T in Switching Power Supply, including following step Suddenly:

Step 71:Obtain the feedback information on Switching Power Supply pair side.

Step 72:Feedback information is encoded according to pre-arranged code rule.

Step 73:Encoded signal is sent by vice-side winding L2 in the dead time of Switching Power Supply;In order to make and transformation The feedback terminal of the auxiliary winding L3 coupling of device is enabled and being coupled with feedback terminal by auxiliary winding L3 received encoded signals Second controller is decoded encoded signal to obtain feedback information, and generates corresponding control signal to drive and transformer Primary side winding coupling power switch.

Referring to FIG. 8, the stream of the primary side feedback method in another Switching Power Supply that Fig. 8 is provided by the embodiment of the present application Cheng Tu is applied to the second controller coupled with the primary side winding L1 of transformer T in Switching Power Supply, includes the following steps:

Step 81:The feedback terminal coupled with the auxiliary winding L3 of transformer is received to examine in the dead time of Switching Power Supply The encoded signal measured;Wherein, encoded signal is that the first controller coupled with the vice-side winding L2 of transformer T is obtaining switch The feedback information on power supply pair side and after being encoded according to pre-arranged code rule, the encoded signal sent by vice-side winding L2.

Step 82:Encoded signal is decoded to obtain feedback information.

Step 83:Corresponding control signal is generated to drive the power switch coupled with the primary side winding L1 of transformer T.

As it can be seen that in Switching Power Supply provided herein in secondary side to the communication means of primary side, by Switching Power Supply In dead time, the encoded signal that feedback information encodes is carried out using vice-side winding L2 by the first controller of secondary avris Send, and the encoded signal that feedback terminal receives be decoded by the second controller of primary side side, complete feedback information by Secondary side and then can carry out scientific and effective adjusting using feedback information to the feedback procedure of primary side to the output of Switching Power Supply. Since the application avoids having used light-coupled isolation device, not only without increasing equipment cost, but also device cloth is also saved Office space, reduces design difficulty.

In Switching Power Supply provided herein secondary side to the communication means of primary side specific implementation mode with retouched above The Switching Power Supply stated can correspond reference, just repeat no more here.

Each embodiment is described by the way of progressive in the application, the highlights of each of the examples are with other realities Apply the difference of example, just to refer each other for identical similar portion between each embodiment.For method disclosed in embodiment Speech, since it is corresponding with device disclosed in embodiment, so description is fairly simple, related place is referring to method part illustration .

It should be noted that in present specification, the relational terms of such as " first " and " second " etc are used merely to One entity is either operated and is distinguished with another entity or operation, without necessarily requiring or implying these entities or There are any actual relationship or orders between person's operation.In addition, the terms "include", "comprise" or its any other Variant is intended to non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only Including those elements, but also include other elements that are not explicitly listed, or further includes for this process, method, object Product or the intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", It is not precluded in the process, method, article or apparatus that includes the element that there is also other identical elements.

Technical solution provided herein is described in detail above.Specific case used herein is to this Shen Principle and embodiment please is expounded, the explanation of above example is only intended to help understand the present processes and its Core concept.It should be pointed out that for those skilled in the art, in the premise for not departing from the application principle Under, can also to the application, some improvement and modification can also be carried out, these improvement and modification also fall into the protection of the application claim In range.

Claims (15)

1. a kind of Switching Power Supply, which is characterized in that including:
Transformer, have coupled with the input stage of the Switching Power Supply primary side winding, coupled with load circuit vice-side winding, And the auxiliary winding coupled with feedback terminal;
The first controller coupled with the vice-side winding;
The second controller and power switch coupled with the primary side winding;
The feedback terminal coupled with the second controller;
First controller is used to obtain the feedback information on Switching Power Supply pair side;And it will be described according to pre-arranged code rule Feedback information is encoded, and encoded signal is sent by the vice-side winding in the dead time of the Switching Power Supply;
The feedback terminal is used to receive the encoded signal by the auxiliary winding;
The second controller generates corresponding control for being decoded to the encoded signal to obtain the feedback information Signal processed is to drive the power switch.
2. Switching Power Supply according to claim 1, which is characterized in that the feedback information include following any one or Arbitrary combination:
Current value, cut-off signals, Restart Signal needed for voltage value, load needed for load.
3. Switching Power Supply according to claim 1, which is characterized in that
The dead time follows after the secondary side turn-on time of the Switching Power Supply, when the secondary side of the Switching Power Supply is connected Between follow after the primary side turn-on time of the Switching Power Supply.
4. Switching Power Supply according to claim 3, which is characterized in that in the dead time and the secondary side turn-on time It is interior, the power switch cut-off.
5. Switching Power Supply according to claim 1, which is characterized in that the pre-arranged code rule is advised for binary coding Then.
6. Switching Power Supply according to claim 1, which is characterized in that first controller is specifically used for:
In the dead time of the Switching Power Supply, believed by turn to the vice-side winding input pulse according to the encoded signal Number;The signal frequency of the pulse signal is related to the size of data of encoded signal corresponding data position.
7. Switching Power Supply according to claim 5, which is characterized in that first controller is specifically used for:
In the dead time of the Switching Power Supply, believed by turn to the vice-side winding input pulse according to the encoded signal Number;The pulse width of the pulse signal is related to the size of data of encoded signal corresponding data position.
8. Switching Power Supply according to claim 6, which is characterized in that first controller is specifically used for:
According to the break-make for the controlled tr tube that the encoded signal cascade control is coupled with the vice-side winding, so as to the pair Side winding inputs the pulse signal;The controlled tr tube is being closed the season vice-side winding formation current path.
9. Switching Power Supply according to claim 8, which is characterized in that the controlled tr tube be and the vice-side winding coupling The secondary side rectification metal-oxide-semiconductor of conjunction.
10. Switching Power Supply according to claim 8, which is characterized in that the controlled tr tube and be coupled in the secondary side The secondary side rectification metal-oxide-semiconductor of winding is in parallel.
11. the Switching Power Supply according to any of claims 1 to 10, which is characterized in that first controller for institute State the secondary side commutation controller of vice-side winding coupling.
12. a kind of Switching Power Supply, which is characterized in that including:
Transformer;
Feedback terminal is used in the dead time of the Switching Power Supply, from the secondary side received encoded signal of the transformer;
The primary side in the transformer is arranged in detection circuit, for being decoded to the encoded signal, and generates corresponding control Signal processed;
Driving circuit is coupled with the detection circuit, for the primary side coupling according to control the signal driving and the transformer The power switch of conjunction.
13. Switching Power Supply according to claim 12, which is characterized in that the auxiliary of the feedback terminal and the transformer Winding coupled;
The feedback terminal is specifically used for:
By the auxiliary winding encoded signal is received from the secondary side of the transformer.
14. secondary side is applied to the secondary side with transformer in the Switching Power Supply to the communication means of primary side in a kind of Switching Power Supply First controller of winding coupled, which is characterized in that including:
Obtain the feedback information on Switching Power Supply pair side;
The feedback information is encoded according to pre-arranged code rule;
Encoded signal is sent by the vice-side winding in the dead time of the Switching Power Supply;In order to make with the transformer The feedback terminal of auxiliary winding coupling the encoded signal is received by the auxiliary winding, and then enable and the feedback terminal The second controller of coupling is decoded the encoded signal to obtain the feedback information, and generates corresponding control signal To drive the power switch coupled with the primary side winding of the transformer.
15. secondary side is applied to the primary side with transformer in the Switching Power Supply to the communication means of primary side in a kind of Switching Power Supply The second controller of winding coupled, which is characterized in that including:
The feedback terminal coupled with the auxiliary winding of the transformer is received to detect in the dead time of the Switching Power Supply Encoded signal;Wherein, the encoded signal is obtaining institute for the first controller coupled with the vice-side winding of the transformer After stating the feedback information on Switching Power Supply pair side and being encoded according to pre-arranged code rule, sent by the vice-side winding Encoded signal;
The encoded signal is decoded to obtain the feedback information;
Generate power switch of the corresponding control signal to drive the primary side winding with the transformer to couple.
CN201810293178.8A 2018-03-30 2018-03-30 A kind of communication means of Switching Power Supply and its secondary side to primary side CN108448877A (en)

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Publication number Priority date Publication date Assignee Title
CN102063784A (en) * 2009-11-17 2011-05-18 江苏省电力公司扬州供电公司 Infrared remote control signal sending circuit
US20120134182A1 (en) * 2009-10-23 2012-05-31 Bcd Semiconductor Manufacturing Limited Control circuits and methods for switching mode power supplies
CN103715910A (en) * 2012-10-05 2014-04-09 Nxp股份有限公司 Switched-mode power supply
CN203827185U (en) * 2014-05-07 2014-09-10 昂宝电子(上海)有限公司 Switching power supply circuit being compatible with various communication command and supporting multistage buck-boost
CN105450051A (en) * 2014-08-19 2016-03-30 苏州力生美半导体有限公司 PSR switching power supply and charger
CN105610306A (en) * 2016-03-01 2016-05-25 深圳南云微电子有限公司 Secondary feedback control method and secondary feedback control circuit

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120134182A1 (en) * 2009-10-23 2012-05-31 Bcd Semiconductor Manufacturing Limited Control circuits and methods for switching mode power supplies
CN102063784A (en) * 2009-11-17 2011-05-18 江苏省电力公司扬州供电公司 Infrared remote control signal sending circuit
CN103715910A (en) * 2012-10-05 2014-04-09 Nxp股份有限公司 Switched-mode power supply
CN203827185U (en) * 2014-05-07 2014-09-10 昂宝电子(上海)有限公司 Switching power supply circuit being compatible with various communication command and supporting multistage buck-boost
CN105450051A (en) * 2014-08-19 2016-03-30 苏州力生美半导体有限公司 PSR switching power supply and charger
CN105610306A (en) * 2016-03-01 2016-05-25 深圳南云微电子有限公司 Secondary feedback control method and secondary feedback control circuit

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