CN108667308A - A kind of micro-power isolated power supply and its control method for M-BUS power supplies - Google Patents
A kind of micro-power isolated power supply and its control method for M-BUS power supplies Download PDFInfo
- Publication number
- CN108667308A CN108667308A CN201810604854.9A CN201810604854A CN108667308A CN 108667308 A CN108667308 A CN 108667308A CN 201810604854 A CN201810604854 A CN 201810604854A CN 108667308 A CN108667308 A CN 108667308A
- Authority
- CN
- China
- Prior art keywords
- isolated
- micro
- power supply
- output
- power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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
- H02M3/33569—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 having several active switching elements
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The present invention proposes a kind of micro-power isolated power supply and its control method for M BUS power supplies, the present invention replaces original inductance in existing BUCK reduction voltage circuits with flyback transformer, and realize that voltage stabilizing output is isolated in micro-power isolated power supply by filter circuit, sample circuit, comparison control circuit, it is that M BUS are bus-powered.Circuit of the present invention is simple, cost of implementation is low, and output voltage stabilization, wide input voltage range can be realized by the characteristics of BUCK circuits, low current inputs under micropower, the requirement for meeting the input of Width funtion low current, the isolation voltage stabilizing output of low-voltage micropower simultaneously, meets the bus-powered demands of M BUS.
Description
Technical field
The present invention relates to micro-power isolated power supply field, more particularly to a kind of micropower isolation electricity for M-BUS power supplies
Source.
Background technology：
M-BUS is a kind of bus design dedicated for public utilities instrument.M-BUS meter bus can meet by battery
The particular/special requirement of the measuring instrument of power supply or remote power feeding.When measuring instrument receives data sending request, by what is currently measured
For data transmission to main website, main website periodically reads the data of these measuring instruments transmission.Fig. 1 is the frame structure of M-BUS and bus
Schematic diagram, because M-BUS almost only works at the time of terminal measuring instrument or counter transmission data, by data transmission
To master station, and M-BUS is in " standby " state in most cases, therefore the work characteristics of the power supply circuit for M-BUS is mostly：
1, operating power consumption is low, generally in milliwatt rank；2, input current is small, and requires no-load power consumption extremely low, to reach energy-efficient target；
3, to avoid the accuracy of M-BUS own signal interference effect terminal meter instrument transmission datas, generally require input terminal with it is defeated
Outlet is isolated；4, Width funtion input requirements can be met, input voltage caused by the reduction of input energy when meeting long-term work
It reduces, extends the M-BUS working times, input voltage range is generally 6-12V or so, and requires output voltage voltage stabilizing.
And according to the above work characteristics of M-BUS buses, the common power source design of more existing M-BUS terminals, Ke Yifa
Existing, current existing electric source topology scheme is difficult to meet above multiple requirements simultaneously, such as：(Royer) circuit is recommended in self-oscillation
Isolation output and small power consumption can be achieved in topology, but cannot be satisfied Width funtion input requirements；Common reverse excitation circuit topology can be achieved
Width funtion inputs, isolation output, but because larger reason itself is lost, power can not be accomplished to very little, and under micro-, small-power
Because efficiency is lower, its input current of input current is also difficult to decrease.
The prior art is often the power source design of M-BUS terminals, existing BUCK reduction voltage circuits such as Fig. 2 of BUCK reduction voltage circuits
It is shown, it is made of switch transistor T, energy storage inductor L, sustained diode, filter capacitor C1, C2, high electricity is driven to when switch transistor T
Flat, pipe T conductings of opening the light, energy storage inductor L is magnetized, and the electric current for flowing through energy storage inductor L is linearly increasing, while giving capacitance C2 chargings,
Energy is provided for output；When switch transistor T is when being driven to low level, metal-oxide-semiconductor TR1 shutdowns, energy storage inductor L passes through fly-wheel diode
D discharges, and inductive current is linearly reduced, and output voltage is maintained by output filter capacitor C2 electric discharges and the inductive current reduced；Though
Width funtion input can be achieved in right existing BUCK reduction voltage circuits topology and power consumption is smaller, but cannot achieve isolation output, and signal is anti-dry
Energy force difference is disturbed, accuracy is not high, also cannot be satisfied the power demands of M-BUS terminating circuits.
Therefore, it is necessary to be improved to the prior art.
Invention content：
Have in view of that, the present invention proposes a kind of micro-power isolated power supply bus-powered for M-BUS, can solve existing
Technology cannot achieve deficiency existing for isolation output, signal poor anti jamming capability etc., meanwhile, the present invention also provides a kind of micro- work(
The corresponding control method of rate isolated power supply, this is the second technical problem to be solved by the present invention.
The invention is realized by the following technical scheme：
A kind of micro-power isolated power supply for M-BUS power supplies, it is characterised in that：Including metal-oxide-semiconductor TR1, diode D1, filter
Wave capacitance C2 and C3, transformer T1, filter circuit, sample circuit, comparison control circuit；Transformer T1 includes a primary side winding
With a vice-side winding；
One end of the drain electrode connection capacitance C2 of metal-oxide-semiconductor TR1, input positive terminal of this tie point as micro-power isolated power supply,
The input of the other end of capacitance C2 as micro-power isolated power supply；The cathode of the source electrode connection diode D1 of metal-oxide-semiconductor TR1 and change
The Same Name of Ends of the primary side winding of depressor T1；The grid of metal-oxide-semiconductor TR1 is connected to the output end of comparison control circuit；Diode D1's
Anode connects the input of micro-power isolated power supply, and draws the non-isolated output as micro-power isolated power supply；Transformer
Draw the non-isolated output plus terminal as micro-power isolated power supply in the different name end of the primary side winding of T1；Filter capacitor C3 is connected to micro-
Between the non-isolated output plus terminal of power isolated power supply and non-isolated output ground；
The input terminal of the vice-side winding connection filter circuit of transformer T1, the output end of filter circuit are isolated as micropower
The isolation output end of power supply；The non-isolated output plus terminal of the input terminal connection micro-power isolated power supply of sample circuit, sample circuit
Output end connection comparison control circuit input terminal, the grid of the output end connection metal-oxide-semiconductor TR1 of comparison control circuit；
Transformer T1 is used for the energy transmission of primary side winding to vice-side winding, and the circle by the way that transformer T1 coils are arranged
Number ratio adjusts the voltage value of vice-side winding output；The voltage that filter circuit is used to export transformer T1 vice-side windings carries out whole
Stream filtering, obtains a smooth output voltage；Sample circuit is used to sample the non-isolated output voltage of micro-power isolated power supply, and
Sampled signal is sent to comparison control circuit；Comparison control circuit is used to sampled signal and setting value being compared, and at it
Output end generates the time of drive signal control metal-oxide-semiconductor TR1 conductings and shutdown.
Preferably, filter circuit includes diode D2 and capacitance C1；Input of the anode of diode D2 as filter circuit
End, the different name end of the vice-side winding of the anode connection transformer T1 of diode D2, the one of the cathode connection capacitance C1 of diode D2
Output plus terminal of the tie point of end, diode D2 and capacitance CI as filter circuit, also as the isolation of micro-power isolated power supply
Output plus terminal；The Same Name of Ends of the vice-side winding of the other end connection transformer T1 of capacitance C1, this node is as the defeated of filter circuit
Go out ground, also exports ground as the isolation of micro-power isolated power supply.
Preferably, sample circuit is composed in series by resistance R1 and resistance R2；One end of resistance R1 is as the defeated of sample circuit
Enter the non-isolated output plus terminal of end connection micro-power isolated power supply, the other end of resistance R1 is connected with one end of resistance R2, resistance
The input of the other end connection micro-power isolated power supply of R2, the output of the series connection point of resistance R1 and resistance R2 as sample circuit
End.
Preferably, comparison control circuit includes comparison amplifier IC2 and control chip IC 1, and comparison amplifier IC2's is anti-
The in-phase input end of input terminal to input terminal as comparison control circuit, comparison amplifier IC2 connects reference voltage, compares and puts
The output end connection control chip IC 1 of big device IC2, the output end of the control output end of chip TC1 as comparison control circuit.
Preferably, the voltage of non-isolated output end is equal to the primary side winding of transformer T1 with the ratio between the voltage that output end is isolated
The ratio between with the coil turn of vice-side winding.
To solve above-mentioned second technical problem, the present invention is realized by following technical measures：
A kind of control method of above-mentioned micro-power isolated power supply, comparison control circuit compare sampled signal and setting value
Compared with when sampled signal is higher than setting value (i.e. non-isolated output end or the voltage that output end is isolated are higher), control chip IC 1 is controlled
The time of metal-oxide-semiconductor TR1 processed conducting reduces, output duty cycle reduce so that the non-isolated output end of micro-power isolated power supply or
The voltage of output end, which is isolated, to be reduced；When (i.e. non-isolated output end or the voltage that output end is isolated are inclined less than setting value for sampled signal
It is low) when, the time that control chip IC 1 controls metal-oxide-semiconductor TR1 conductings increases, and output duty cycle increases, so that micropower is isolated
The voltage of the non-isolated output end of power supply and isolation output end rises, realize micro-power isolated power supply non-isolated output end and every
Voltage stabilizing output from output end.
Compared with prior art, the present invention has following remarkable result：
1, the input of Width funtion low current can be achieved at the same time in the present invention, and voltage stabilizing output is isolated in low-voltage micropower；It is very suitable
It is combined into the terminal power supply of M-BUS systems；
2, circuit design of the present invention, calculating and implementation method simple possible；
3, isolation output, all the way non-isolated output all the way can be achieved at the same time in the present invention, and two output voltage value can be only
It erects and sets, used convenient for users to selection；
4, the present invention can be used the whole control IC built in metal-oxide-semiconductor and realize that no-load power consumption is lower, small product size smaller, and
Reliability is high, and high temperature performance is superior.
Description of the drawings：
Fig. 1 is the circuit theory schematic diagram of M-BUS buses and main website cooperating；
Fig. 2 is the schematic diagram of prior art BUCK reduction voltage circuits；
Fig. 3 is the circuit diagram that the present invention applies；
Fig. 4 is voltage, the electric current sequence diagram of application circuit of the present invention.
Specific implementation mode
In order to make the present invention be more clearly understood, with reference to the accompanying drawings and embodiments, the present invention is described in more detail.
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
Fig. 3 is the circuit diagram that the present invention applies, and Fig. 4 is voltage, the electric current sequence diagram of application circuit of the present invention, this reality
The circuit composition for applying example is as follows：
Power device：Metal-oxide-semiconductor TR1, capacitance C2, capacitance C3, diode D1, transformer T1：Primary side winding, vice-side winding；
Filter circuit：Diode D2, capacitance C1；
Sample circuit：Resistance R1, resistance R2；
Comparison control circuit：Comparison amplifier IC2, control chip IC 1.
The complete connection relation of the present embodiment is：
The both ends of capacitance C2 respectively as the input positive terminal of micro-power isolated power supply and the input of micro-power isolated power supply,
The input positive terminal of micro-power isolated power supply successively pass through the drain electrode of metal-oxide-semiconductor TR1, the source electrode of metal-oxide-semiconductor TR1, transformer T1 primary sides around
Group Same Name of Ends, transformer T1 primary side windings different name end draw as micro-power isolated power supply non-isolated output just；Metal-oxide-semiconductor
The source electrode of TR1 passes through the anode of the cathode of diode D1, diode D1 with the tie point of the Same Name of Ends of transformer T1 primary side windings
With being connected to the output of micro-power isolated power supply, and non-isolated output as micro-power isolated power supply is drawn；Capacitance C3 is simultaneously
It is associated between the non-isolated output plus terminal of micro-power isolated power supply and non-isolated output ground；Micro-power isolated power supply it is non-isolated defeated
Go out anode and passes through the input that resistance R1, resistance R2 are connected to micro-power isolated power supply, the series connection of resistance R1 and resistance R2 successively
Point is connected to the reverse input end of comparison amplifier IC2, the homophase input of comparison amplifier IC2 as the output end of sample circuit
The output end of end connection reference power supply Ref, comparison amplifier IC2 are connected to the input terminal of control chip IC 1, control the defeated of chip
Outlet connects the grid of metal-oxide-semiconductor TR1；The different name end of transformer T1 vice-side windings is by the anode of diode D2, diode D2
Cathode draws the isolation output plus terminal as micro-power isolated power supply, and the Same Name of Ends of transformer T1 vice-side windings, which is drawn, is used as micro- work(
The isolation output ground of rate isolated power supply, the output that capacitance C1 is connected in parallel on micro-power isolated power supply are just defeated with micro-power isolated power supply
Go out between ground.
In conjunction with Fig. 3 and Fig. 4, operation principle of the invention is described as follows：
When metal-oxide-semiconductor TR1 is connected, diode D1 is in cut-off state.Metal-oxide-semiconductor TR1, transformer T1 primary side windings, it is non-every
Load three from end output end constitutes current loop, and the pressure drop of power input voltage is born at the both ends of diode D1.This time-varying
The primary side winding energy storage of depressor T1, while and charge to capacitance C3, and because transformer T1 vice-side winding and primary side around
The Same Name of Ends of group is reversed, and the different name end level of vice-side winding is negative at this time, and the Same Name of Ends level of vice-side winding is just so that two
Pole pipe D2 cut-offs, at this time capacitance C1 electric discharges provide isolated from power voltage Vo1 for the isolation output end of micro-power isolated power supply.
When metal-oxide-semiconductor TR1 is turned off, according to the principle that inductive current cannot be mutated, the primary side winding of transformer T1 induces
One electromotive force reversed with the Same Name of Ends of primary side winding, that is, at this time the different name end level of the primary side winding of transformer T1 be just,
The Same Name of Ends level of the primary side winding of transformer T1 is negative, and diode D1 is connected at this time, the primary side winding of transformer T1, diode
D1, non-isolated end output loading three constitute current loop, the primary side winding degaussing of transformer T1 at this time, for micropower isolation electricity
The non-isolated output end in source provides power supply non-isolated voltage Vo2.Because of the vice-side winding of transformer T1 and the Same Name of Ends of primary side winding
To be reversed, at this point, the different name end level of the vice-side winding of transformer T1 is just, the Same Name of Ends level of vice-side winding is negative so that
Diode D2 conducting, at this point, diode D2, transformer T1 vice-side windings, isolation output end output loading constitute current loop,
The vice-side winding degaussing of transformer T1 at this time provides voltage, and filtered electricity for the isolation output end of micro-power isolated power supply
It is drawn after holding C1 rectifying and wave-filterings, out-put supply isolation voltage Vo1.
The effect of sampling resistor R1, R2 are to sample the non-isolated output end voltage Vo2 of micro-power isolated power supply and will sample
Voltage signal is sent to the reverse input end of comparison amplifier IC2, and comparison amplifier IC2 is by the base of sampled voltage signal and setting
Quasi- voltage signal is compared, and outputs control signals to the input terminal of control chip IC 1；Chip IC 1 is controlled according to control to believe
It is number output duty cycle drive signal, the conducting that metal-oxide-semiconductor works in control circuit and the time (i.e. duty ratio) disconnected, micro- to realize
The voltage stabilizing output of the non-isolated output end and isolation output end of power isolated power supply.
When sampled signal is higher than setting value (i.e. non-isolated output end or the voltage that output end is isolated are higher), chip is controlled
The time that IC1 controls metal-oxide-semiconductor TR1 conducting reduces, output duty cycle reduce so that micro-power isolated power supply it is non-isolated defeated
Outlet or the voltage that output end is isolated reduce；When less than setting value, (output end is isolated in i.e. non-isolated output end to sampled signal
Low voltage) when, the time that control chip IC 1 controls metal-oxide-semiconductor TR1 conductings increases, and output duty cycle increases, so that micro- work(
The non-isolated output end of rate isolated power supply and the voltage of isolation output end rise.
At this point, micro-power isolated power supply realizes two-way output, is exported all the way for isolation, be all the way non-isolated output, and
The voltage of the primary side winding of transformer T1 is the non-isolated voltage Vo2 of micro-power isolated power supply can lead to according to the characteristic of transformer
Overregulate transformer primary side winding and the vice-side winding turn ratio " Np：Ns”(Np：Ns=Vo2：Vo1), so as to micropower is arranged
The isolation voltage value Vo1 of isolated power supply.
The present invention is provided simultaneously with the characteristics of Width funtion input possessed by BUCK reduction voltage circuits, low-voltage voltage stabilizing output, then
By using the design of flyback transformer, and by using sample circuit, comparison control circuit, control circuit collective effect under
The present invention can meet the input of Width funtion low current simultaneously under the conditions of micropower, the isolation voltage stabilizing of low-voltage micropower exports
It is required that more adapt to the power demands of M-BUS.
In addition, the present embodiment circuit metal-oxide-semiconductor TR1, control chip IC 1 and comparison amplifier IC2 can pass through integrated circuit skill
Art is integrated into an entirety control chip can reduce the input of product under small output power to realize lower no-load power consumption
Electric current.
Above the preferred embodiment of the present invention, it is noted that above-mentioned preferred embodiment is not construed as to this hair
Bright limitation for those skilled in the art without departing from the spirit and scope of the present invention, can be with
Several improvements and modifications are made, for example, replacing filter capacitor C1, C2 in embodiment one, C3 with existing filter circuit, with now
Some control circuits replace the sampling control circuit etc. in embodiment one, can also achieve the object of the present invention, these improve and
Retouching also should be regarded as protection scope of the present invention, and protection scope of the present invention should be subject to claim limited range.
Claims (6)
1. a kind of micro-power isolated power supply for M-BUS power supplies, it is characterised in that：Including metal-oxide-semiconductor TR1, diode D1, filtering
Capacitance C2 and C3, transformer T1, filter circuit, sample circuit, comparison control circuit；Transformer T1 include primary side winding and
One vice-side winding；
One end of the drain electrode connection capacitance C2 of metal-oxide-semiconductor TR1, input positive terminal of this tie point as micro-power isolated power supply, capacitance
The input of the other end of C2 as micro-power isolated power supply；The cathode and transformer of the source electrode connection diode D1 of metal-oxide-semiconductor TR1
The Same Name of Ends of the primary side winding of T1；The grid of metal-oxide-semiconductor TR1 is connected to the output end of comparison control circuit；The anode of diode D1
It connects the input of micro-power isolated power supply, and draws the non-isolated output as micro-power isolated power supply；Transformer T1's
Draw the non-isolated output plus terminal as micro-power isolated power supply in the different name end of primary side winding；Filter capacitor C3 is connected to micropower
Between the non-isolated output plus terminal of isolated power supply and non-isolated output ground；
The input terminal of the vice-side winding connection filter circuit of transformer T1, the output end of filter circuit is as micro-power isolated power supply
Isolation output end；Sample circuit input terminal connection micro-power isolated power supply non-isolated output plus terminal, sample circuit it is defeated
Outlet connects the input terminal of comparison control circuit, the grid of the output end connection metal-oxide-semiconductor TR1 of comparison control circuit；
Transformer T1 is used for the energy transmission of primary side winding to vice-side winding, and the turn ratio by the way that transformer T1 coils are arranged
Value adjusts the voltage value of vice-side winding output；The voltage that filter circuit is used to export transformer T1 vice-side windings carries out rectification filter
Wave obtains a smooth output voltage；Sample circuit is used to sample the non-isolated output voltage of micro-power isolated power supply, and will adopt
Sample signal is sent to comparison control circuit；Comparison control circuit is used to sampled signal and setting value being compared, and in its output
End generates the time that a drive signal is used to control metal-oxide-semiconductor TR1 conductings and shutdown.
2. micro-power isolated power supply according to claim 1, it is characterised in that：Filter circuit includes diode D2 and capacitance
C1；Input terminal of the anode of diode D2 as filter circuit, the vice-side winding of the anode connection transformer T1 of diode D2
Different name end, one end of the cathode connection capacitance C1 of diode D2, the tie point of diode D2 and capacitance CI is as filter circuit
Output plus terminal, also as the isolation output plus terminal of micro-power isolated power supply；The secondary side of the other end connection transformer T1 of capacitance C1
The Same Name of Ends of winding, output of this node as filter circuit, also exports ground as the isolation of micro-power isolated power supply.
3. micro-power isolated power supply according to claim 2, it is characterised in that：Sample circuit is by resistance R1 and resistance R2 strings
Connection composition；One end of resistance R1 connects the non-isolated output plus terminal of micro-power isolated power supply, electricity as the input terminal of sample circuit
The other end of resistance R1 is connected with one end of resistance R2, the input of the other end connection micro-power isolated power supply of resistance R2, resistance
Output end of the series connection point of R1 and resistance R2 as sample circuit.
4. micro-power isolated power supply according to claim 3, it is characterised in that：Comparison control circuit includes comparison amplifier
IC2 and control chip IC 1, the input terminal of the reverse input end of comparison amplifier IC2 as comparison control circuit compare amplification
The in-phase input end of device IC2 connects reference voltage, and the output end connection of comparison amplifier IC2 controls chip IC 1, chip TC1's
Output end of the control output end as comparison control circuit.
5. micro-power isolated power supply according to claim 4, it is characterised in that：The voltage of non-isolated output end be isolated it is defeated
The ratio between the coil turn of primary side winding and vice-side winding of the ratio between the voltage of outlet equal to transformer T1.
6. the control method of micro-power isolated power supply according to any one of claims 1 to 5, it is characterised in that：Compare control
Sampled signal is compared by circuit with setting value, when sampled signal is higher than setting value (i.e. non-isolated output end or isolation output
The voltage at end is higher) when, the time that control chip IC 1 controls metal-oxide-semiconductor TR1 conducting reduces, output duty cycle reduce so that
The non-isolated output end of micro-power isolated power supply or the voltage that output end is isolated reduce；When sampled signal is (i.e. non-less than setting value
Output end is isolated or the low voltage of output end is isolated) when, the time that control chip IC 1 controls metal-oxide-semiconductor TR1 conductings increases, defeated
Go out duty ratio increase, so that the voltage of the non-isolated output end of micro-power isolated power supply and isolation output end rises, realizes
The voltage stabilizing output of the non-isolated output end and isolation output end of micro-power isolated power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810604854.9A CN108667308A (en) | 2018-06-13 | 2018-06-13 | A kind of micro-power isolated power supply and its control method for M-BUS power supplies |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810604854.9A CN108667308A (en) | 2018-06-13 | 2018-06-13 | A kind of micro-power isolated power supply and its control method for M-BUS power supplies |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108667308A true CN108667308A (en) | 2018-10-16 |
Family
ID=63775775
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810604854.9A Pending CN108667308A (en) | 2018-06-13 | 2018-06-13 | A kind of micro-power isolated power supply and its control method for M-BUS power supplies |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108667308A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110492567A (en) * | 2019-06-26 | 2019-11-22 | 上海云衡科技有限公司 | Power supply system |
| CN112350613A (en) * | 2020-10-22 | 2021-02-09 | 戴小明 | Thermoelectric conversion device and novel gas cooker |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5552695A (en) * | 1994-03-22 | 1996-09-03 | Linear Technology Corporation | Synchronously rectified buck-flyback DC to DC power converter |
| CN201450447U (en) * | 2009-07-17 | 2010-05-05 | 河海大学 | synchronous rectification buck-flyback converter |
| CN103683952A (en) * | 2013-11-22 | 2014-03-26 | 西南交通大学 | Parallel integrated Buck-Flyback power factor correction (PFC) converter topology |
| CN203617902U (en) * | 2013-12-09 | 2014-05-28 | 杭州士兰微电子股份有限公司 | Integrated buck-flyback type high power factor constant current circuit and device |
| CN204794705U (en) * | 2015-07-17 | 2015-11-18 | 西安科技大学 | Multiplexed output flyback converter of uninterrupted power supply |
| CN208424211U (en) * | 2018-06-13 | 2019-01-22 | 广州金升阳科技有限公司 | A kind of micro-power isolated power supply for M-BUS power supply |
-
2018
- 2018-06-13 CN CN201810604854.9A patent/CN108667308A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5552695A (en) * | 1994-03-22 | 1996-09-03 | Linear Technology Corporation | Synchronously rectified buck-flyback DC to DC power converter |
| CN201450447U (en) * | 2009-07-17 | 2010-05-05 | 河海大学 | synchronous rectification buck-flyback converter |
| CN103683952A (en) * | 2013-11-22 | 2014-03-26 | 西南交通大学 | Parallel integrated Buck-Flyback power factor correction (PFC) converter topology |
| CN203617902U (en) * | 2013-12-09 | 2014-05-28 | 杭州士兰微电子股份有限公司 | Integrated buck-flyback type high power factor constant current circuit and device |
| CN204794705U (en) * | 2015-07-17 | 2015-11-18 | 西安科技大学 | Multiplexed output flyback converter of uninterrupted power supply |
| CN208424211U (en) * | 2018-06-13 | 2019-01-22 | 广州金升阳科技有限公司 | A kind of micro-power isolated power supply for M-BUS power supply |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110492567A (en) * | 2019-06-26 | 2019-11-22 | 上海云衡科技有限公司 | Power supply system |
| CN110492567B (en) * | 2019-06-26 | 2021-03-26 | 上海云衡科技有限公司 | Power supply system |
| CN112350613A (en) * | 2020-10-22 | 2021-02-09 | 戴小明 | Thermoelectric conversion device and novel gas cooker |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2013010385A1 (en) | Self-excited push-pull converter | |
| CN103052240B (en) | High-power factor light-emitting diode driving circuit structure | |
| CN102223076A (en) | Magnetic isolated feedback circuit for Buck-type DC (direct current)/DC switching power supply | |
| CN103401428B (en) | Switch power supply control chip and switch power supply control system | |
| CN104578844A (en) | Switching mode power supply circuit | |
| CN208767975U (en) | A kind of tandem type flyback converter | |
| CN101924470A (en) | Low-voltage power supply multi-path output power | |
| CN208424211U (en) | A kind of micro-power isolated power supply for M-BUS power supply | |
| CN108667308A (en) | A kind of micro-power isolated power supply and its control method for M-BUS power supplies | |
| CN201887660U (en) | LPC switch power supply circuit and air conditioner with same | |
| CN103414323A (en) | Circuit for reducing turn-on time of current control type switch adjusting system | |
| CN203466720U (en) | Circuit reducing opening time in current control type switching regulating system | |
| CN208589920U (en) | A kind of isolated form Wide-range voltage-stabilised power source circuit | |
| CN205319941U (en) | Double - circuit voltage conversion control chip , double - circuit voltage conversion ware and electronic electric energy meter | |
| CN204517683U (en) | Non-isolated AC/DC regulator circuit and Switching Power Supply | |
| CN102810986B (en) | A kind of series topology LED switch power circuit | |
| CN110579639B (en) | Mains supply zero-crossing detection circuit and switch power supply system using same | |
| CN207265870U (en) | A kind of synchronous rectification integral control circuit | |
| CN214473586U (en) | Detection device for sampling input end isolation voltage | |
| WO2022127049A1 (en) | Resonant tank circuit, wide voltage input and output power source, and electronic device | |
| CN205490213U (en) | Switching power supply of electric energy meter | |
| CN204795770U (en) | Low ripple LED drive power supply's of no electrolytic capacitor intelligent digital control circuit | |
| CN204119073U (en) | A kind of input multichannel that exchanges isolates low-power out-put supply | |
| CN209375470U (en) | A kind of balance modulation switch stabilized voltage power supply | |
| CN207720021U (en) | A kind of protective circuit of switch power source based on UC3842 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |