CN104578801B - A kind of digital telecommunication circuit for isolating switch power chip - Google Patents
A kind of digital telecommunication circuit for isolating switch power chip Download PDFInfo
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- CN104578801B CN104578801B CN201510021031.XA CN201510021031A CN104578801B CN 104578801 B CN104578801 B CN 104578801B CN 201510021031 A CN201510021031 A CN 201510021031A CN 104578801 B CN104578801 B CN 104578801B
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- Prior art keywords
- signal
- switch power
- isolating switch
- chip
- output
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS 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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion 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
- H02M3/325—Conversion 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
- H02M3/335—Conversion 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
- H02M3/33507—Conversion 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 with automatic control of the output voltage or current, e.g. flyback converters
- H02M3/33515—Conversion 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 with automatic control of the output voltage or current, e.g. flyback converters with digital control
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS 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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion 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
- H02M3/325—Conversion 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
- H02M3/335—Conversion 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
- H02M3/33507—Conversion 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 with automatic control of the output voltage or current, e.g. flyback converters
- H02M3/33523—Conversion 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 with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
- Control Of Voltage And Current In General (AREA)
Abstract
The invention discloses a kind of digital telecommunication circuit for isolating switch power chip, including：Load detecting module, detection signal is exported for detecting the load of isolating switch power chip output, and according to the load detected；Reference signal generation module, for generating reference signal；Comparator, for the detection signal obtained and reference signal contrast to be obtained into data signal；Decoder module, decoded signal, and the input using decoded signal as isolating switch power core tablet controller are obtained for carrying out decoding to data signal；The controller generates control signal and the output that driving switch power supply chip working condition changes according to the decoded signal.The present invention can load according to the chip of detection, actively send control instruction to the controller of isolating switch power chip, realize the change to chip parameter and function, extra component is not needed, implementation is simple, and more relatively reliable than analogue communication using digital communication mode, effectively avoids false triggering.
Description
Technical field
The present invention relates to a kind of digital telecommunication circuit for isolating switch power chip, belongs to switching power circuit design
Technical field.
Background technology
With the prevalence of portable electronic equipment, Switching Power Supply already turns into the main power source side of this kind of electronic equipment
Case.Fig. 1 gives a kind of traditional isolating switch power chip structure, and chip main modular includes：Voltage Feedback detection module,
Current feedback detection module, controller, power supply.Fig. 2 gives a kind of system schema of traditional switching power source chip structure,
The system mainly includes：Rectifier bridge D0, filter capacitor C1, transformer TR1, power supply chip IC1, open with what chip OUTPUT was connected
Guan Guan, the CS sampling circuits being connected with switching tube, the DC output stages being connected with transformer secondary, it is connected with transformer ancillary coil
VDD current supply circuits and FB backfeed loops.System Working Principle is briefly described below：When DC output voltages Vout is less than target electricity
During pressure, FB feedback voltage VsSENSEReduce, power supply chip ICI can increase the dutycycle of switching frequency, allow switching tube ON time more
It is long, to transmit more energy to the secondary of transformer, raise output voltage Vout；When DC output voltages Vout is higher than target
During voltage, FB voltages rise, power supply chip ICI will reduce the dutycycle of switching frequency, and switching tube ON time diminishes, to pass
Less energy is passed to the secondary of transformer, makes output voltage Vout reductions.And this working method output end is only only passively
Feedback switch power supply chip, chip operation pattern or parameter can not be changed on one's own initiative.
Therefore, existing isolating switch power chip can not actively change chip operation pattern and parameter, can not be by complete machine
System output actively sends signal of communication to switching power source chip, can not realize the adjustment to chip parameter and function.
The content of the invention
The technical problems to be solved by the invention are overcome the deficiencies in the prior art, there is provided one kind is powered-down for keeping apart
The digital telecommunication circuit of source chip, realize the adjustment to chip parameter and function.
It is of the invention specifically to solve above-mentioned technical problem using following technical scheme：
A kind of digital telecommunication circuit for isolating switch power chip, including：
Load detecting module, for detecting the load of isolating switch power chip output, and according to the load detected
Size exports detection signal；
Reference signal generation module, for generating reference signal；
Comparator, for the detection signal obtained and reference signal contrast to be obtained into data signal；
Decoder module, decoded signal is obtained for carrying out decoding to data signal, and using decoded signal as disconnecting switch
The input of controller in power supply chip；The controller generates driving switch power supply chip working condition according to the decoded signal
The control signal of change and output.
Further, as a preferred technical solution of the present invention：The reference signal generation module is examined according to load
Survey the threshold value of the range set reference signal of the detection signal of module output.
Further, as a preferred technical solution of the present invention：The digital telecommunication circuit is used in charger
Isolating switch power chip be driven.
Further, as a preferred technical solution of the present invention：The detection signal of the load detecting module output
For voltage detection signal or current detection signal.
Further, as a preferred technical solution of the present invention：It is anti-that the isolating switch power chip includes voltage
Present detection module, current feedback detection module and controller.
The present invention uses above-mentioned technical proposal, can produce following technique effect：
（1）, using the present invention digital telecommunication circuit be used for isolating switch power chip, applied in the output stage of machine system
Add control so as to change load, decoded signal is converted to by digital telecommunication circuit, and then change chip operation pattern
And parameter.
（2）, using the present invention it is this be used for isolating switch power chip digital telecommunication circuit, machine system does not need volume
Outer component, implementation are simple.
（3）, using the present invention it is this be used for isolating switch power chip digital telecommunication circuit, communications protocol can be free
Definition, and it is more relatively reliable than analogue communication using digital communication mode, effectively avoid false triggering.
Brief description of the drawings
Fig. 1 is primary side feedback switching power source chip structural representation in the prior art.
Fig. 2 is the system schema for using switching power source chip in the prior art.
Fig. 3 is the structural representation that the present invention is used for isolating switch power chip digital telecommunication circuit.
Fig. 4 is the schematic diagram that load detecting voltage signal is converted into control instruction in embodiments of the invention one.
Fig. 5 is the schematic diagram that load detecting current signal is converted into control instruction in embodiments of the invention two.
Fig. 6 is load detecting voltage signal in embodiments of the invention three（Caused by external interference）It is converted into illegal command
Schematic diagram.
Embodiment
Embodiments of the present invention are described with reference to Figure of description.
In the structure of isolating switch power chip, including Voltage Feedback detection module, current feedback detection module and control
Device processed, Voltage Feedback detection module, current feedback detection module connect the input of controller respectively, the output end of controller with
The output end of chip is connected, and the present invention have also been devised a kind of digital telecommunication circuit for isolating switch power chip, such as Fig. 3
Shown, circuit also includes：Load detecting module, reference signal generation module, comparator, decoder module, wherein the load inspection
Survey module and reference signal generation module connects comparator respectively；The comparator is connected with decoder module；The decoder module
It is connected with controller, the output end of controller is connected with switching power source chip；The digital telecommunication circuit of the present invention is to utilize load
Detection signal detects the load of isolating switch power chip output, and exports detection signal according to the load detected,
The detection signal of output is voltage detection signal or current detection signal, in generation voltage reference signal or current reference signal
Afterwards, by detection signal compared with reference signal is by comparator acquisition data signal；Then, obtained data signal is entered
Row decoding obtains decoded signal input controller, by controller generation control signal input isolating switch power chip；It is described every
Chip operation pattern and parameter are changed according to the control signal of reception from switching power source chip, so that digital telecommunication circuit is real
Now to the adjustment of chip parameter and function.
Further, in digital telecommunication circuit of the invention, the reference signal generation module is according to load detecting module
The threshold value of the detection signal size setting reference signal of output, so that two groups of signals of contrast device input are in comparison range
It is interior.
The specific embodiment of the present invention is given below：
Embodiments of the invention one, it is assumed that it is desirable that realizing that system output voltage brings up to 6V from initial 5V, it is assumed that set
The scope of meter load detecting module output signal is 0V to 3V, and output signal 0V to 1.2V thinks system output for heavy duty, 1.2V
Think that system output is underloading to 3.0V.The voltage reference signal of reference signal generation module is arranged to voltage 1.2V first,
" underloading-heavy duty-underloading-underloading-underloading-heavy duty-heavy duty-light is realized in the control load of isolating switch power chip output successively
Carry " change, then using voltage reference signal and load detection signal simultaneously as the input of comparator, by comparator to this two
Group signal is compared, and the waveform diagram that comparator obtains in the present embodiment obtains one kind and be as shown in figure 4, comparing
The data signal of " 10111001 "；The data signal of acquisition is input in decoder module and decoded, obtains control command electricity
Feedback module benchmark is pressed to improve 0.2V, to form control signal, controller of the final output to isolating switch power chip internal
In；Switching power source chip finally realizes that system output voltage improves 1V according to the control command, i.e., brings up to 6V from initial 5V.
Embodiments of the invention two, it is assumed that it is desirable that realizing that chip output switch frequency improves 10Khz, it is assumed that designed load
The scope of detection module output signal is 0uA to 50uA, and output signal 0uA to 10uA thinks that system output is arrived for heavy duty, 10uA
50uA thinks that system output is underloading.It is that current reference signal is arranged to electric current 10uA first by reference signal generation module, so
Afterwards isolating switch power chip output control load successively realize " underloading-heavy duty-heavy duty-heavy duty-underloading-heavy duty-underloading-
The change of heavy duty-heavy duty-underloading " is then using current reference signal and current signal simultaneously as the input of comparator, by comparing
Device is compared to two groups of signals, and the waveform diagram that comparator obtains in the present embodiment obtains one as shown in figure 5, comparing
Kind is the data signal of " 0111010110 "；Then, the data signal of acquisition is input in decoder module and decoded, obtained
Control command is that controller switches frequency improves 10Khz, and to form control signal, final output is in isolating switch power chip
In the controller in portion；Switching power source chip realizes that chip output switch frequency improves 10Khz according to the control command.
Embodiments of the invention three, it is assumed that the scope of designed load detecting module output signal is 0V to 3V, output letter
Number 0V to 1.2V thinks system output for heavy duty, and it is underloading that 1.2V to 3.0V, which thinks that system exports,.Reference signal generation module
Voltage reference signal is arranged to voltage 1.2V, isolating switch power chip output because generated by external interference " underloading-
The change of heavy duty-underloading-underloading-underloading-underloading ", using voltage reference signal and load detection signal simultaneously as comparator
Input, two groups of signals are compared by comparator, in the present embodiment comparator obtain waveform diagram as shown in fig. 6,
Compare and obtain a kind of data signal for " 101111 "；The data signal of acquisition is input in decoder module and decoded,
It is illegal command to draw the instruction, does not send controller of the control signal to isolating switch power chip, switching power source chip is not
Make any parameter adjustment and function changes.
Also, for the digital telecommunication circuit of the present invention, it can be also used for the isolating switch power chip in charger
It is driven, mainly but is not limited to the use of the quick-charge function for realizing charger, realizes the working condition to charger automatically
Switching and parameter change.
Therefore, the present invention is used for isolating switch power chip digital telecommunication circuit using the present invention, by increasing numeral
Telecommunication circuit, switching power source chip is actively sent a signal to by machine system output end, by isolating switch power chip
Output end applies control, it is possible to achieve the active control of system output, including adjustment output voltage, output current etc., with actively
Change chip operation pattern and parameter, realize the adjustment to chip parameter and function.
Embodiments of the present invention are explained in detail above in conjunction with accompanying drawing, but the present invention is not limited to above-mentioned implementation
Mode, can also be on the premise of present inventive concept not be departed from those of ordinary skill in the art's possessed knowledge
Make a variety of changes.
Claims (5)
- A kind of 1. digital telecommunication circuit for isolating switch power chip, it is characterised in that including：Load detecting module, for detecting the load of isolating switch power chip output, and according to the load detected Export detection signal；Reference signal generation module, the size of the detection signal for being exported according to load detecting module is set and generation benchmark letter Number；Comparator, for the detection signal obtained and reference signal contrast to be obtained to the data signal of n Bits Serials, wherein n is big In with equal to 2；Decoder module, the decoded signal for including control instruction, wherein institute are obtained for carrying out decoding to the data signal of n Bits Serials State control instruction to comprise at least to output voltage or output switch frequency or the instruction for not doing any parameter adjustment, and decoding is believed Input number as isolating switch power core tablet controller；Control instruction life of the controller in the decoded signal Into driving switch power supply chip output voltage or the control signal of output switch frequency shift and output.
- 2. it is used for the digital telecommunication circuit of isolating switch power chip according to claim 1, it is characterised in that：The benchmark The threshold value of the range set reference signal for the detection signal that signal generator module exports according to load detecting module.
- 3. it is used for the digital telecommunication circuit of isolating switch power chip according to claim 1, it is characterised in that：The numeral Telecommunication circuit is used to be driven the isolating switch power chip in charger.
- 4. it is used for the digital telecommunication circuit of isolating switch power chip according to claim 1, it is characterised in that：The load The detection signal of detection module output is voltage detection signal or current detection signal.
- 5. it is used for the digital telecommunication circuit of isolating switch power chip according to claim 1, it is characterised in that：The isolation Switching power source chip includes Voltage Feedback detection module, current feedback detection module and controller.
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| CN201510021031.XA CN104578801B (en) | 2015-01-16 | 2015-01-16 | A kind of digital telecommunication circuit for isolating switch power chip |
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| CN201510021031.XA CN104578801B (en) | 2015-01-16 | 2015-01-16 | A kind of digital telecommunication circuit for isolating switch power chip |
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| CN104578801A CN104578801A (en) | 2015-04-29 |
| CN104578801B true CN104578801B (en) | 2017-12-29 |
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| JP2022189475A (en) * | 2021-06-11 | 2022-12-22 | キヤノン株式会社 | Power supply device and image forming apparatus |
| CN115017095B (en) * | 2022-08-05 | 2022-11-08 | 微传智能科技（常州）有限公司 | Current output type AK protocol wheel speed chip communication system and method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1604445A (en) * | 2002-07-10 | 2005-04-06 | 马维尔国际贸易有限公司 | Energy saving discontinuous mode system and method |
| CN103795133A (en) * | 2013-12-30 | 2014-05-14 | 深圳天珑无线科技有限公司 | Power supply |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102355382A (en) * | 2011-09-28 | 2012-02-15 | 东南大学 | Method for analyzing and triggering controller area network (CAN) bus |
| CN103855928B (en) * | 2012-12-05 | 2016-05-18 | 产晶积体电路股份有限公司 | Multifunctional digital pulse width modulation controller |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1604445A (en) * | 2002-07-10 | 2005-04-06 | 马维尔国际贸易有限公司 | Energy saving discontinuous mode system and method |
| CN103795133A (en) * | 2013-12-30 | 2014-05-14 | 深圳天珑无线科技有限公司 | Power supply |
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