CN207910681U - Signalized control circuit and Switching Power Supply - Google Patents
Signalized control circuit and Switching Power Supply Download PDFInfo
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- CN207910681U CN207910681U CN201820233070.5U CN201820233070U CN207910681U CN 207910681 U CN207910681 U CN 207910681U CN 201820233070 U CN201820233070 U CN 201820233070U CN 207910681 U CN207910681 U CN 207910681U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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Abstract
The utility model provides a kind of Signalized control circuit and includes the Switching Power Supply of the Signalized control circuit, the Signalized control circuit includes amplifying circuit, switching circuit and comparison circuit, the amplifying circuit is used to obtain the load voltage of load, and exports corresponding amplification voltage after the load voltage is amplified；The amplification voltage is compared by the switching circuit with threshold voltage；The input terminal of the comparison circuit, the comparison circuit is electrically connected the switching circuit, and exports comparison signal to external indicating circuit；If the amplification voltage is more than the threshold voltage, the switching circuit conducting, and exports low level switching signal, the voltage value of the comparison signal is first voltage, and the indicating circuit is in the first working condition；If the amplification voltage is not more than the threshold voltage, the switching circuit disconnects, and the comparison signal is pulse signal, and the indicating circuit is in the second working condition.
Description
Technical field
The utility model is related to power technique fields more particularly to a kind of Signalized control circuit and Switching Power Supplies.
Background technology
This part intends to provides background or up and down for specific embodiment of the present utility model for being stated in claims
Text.Description herein recognizes it is the prior art not because not being included in this part.
Usually, conventional power source indicator light transformation control section mainly uses controller to control, with output voltage or list
The only power supply of auxiliary winding all the way is powered to controller, and controller exports square wave by current-limiting resistance, by adjusting side
Wave duty ratio, in conjunction with periphery circuit come the flicker for realizing indicator light and long bright state, to distinguish the corresponding charging shape of instruction load
State, for example load and charging or charging complete.
However, controller periphery circuit is relatively complicated, it is easy to cause malfunction because of external disturbance and cost is higher.
Utility model content
In view of this, the utility model provides a kind of low cost signal lamp control circuit that circuit is simple and reliable, the present invention
A kind of Switching Power Supply is also provided.
A kind of Signalized control circuit, including：
Amplifying circuit, the load voltage for obtaining load, and export corresponding amplification after the load voltage is amplified
Voltage；
The amplification voltage is compared by switching circuit with threshold voltage；
The input terminal of comparison circuit, the comparison circuit is electrically connected the switching circuit, and exports comparison signal to outside
Indicating circuit；
If the amplification voltage is more than the threshold voltage, the switching circuit conducting, and exports low level switch letter
Number, the voltage value of the comparison signal is first voltage, and the indicating circuit is in the first working condition；
If the amplification voltage is not more than the threshold voltage, the switching circuit disconnects, and the comparison signal is pulse
Signal, the indicating circuit are in the second working condition.
Further, the comparison circuit further includes translation circuit；
In the case where the indicator light is in the second working condition,
When the comparison signal is high level, the translation circuit is delayed after the first preset time, controls the comparison
The low level comparison signal of circuit output；
When the comparison signal is low level, the translation circuit is delayed after the second preset time, controls the comparison
The comparison signal of circuit output high level.
Further, the comparison circuit further includes comparator, and the translation circuit includes resistance and capacitance component, described
The first end of capacitance component is electrically connected one end of the resistance and the reverse input end of the comparator, the capacitance component it is another
One end is grounded, and the other end of the resistance is electrically connected the output end of the comparator.
Further, power supply is powered for the indicating circuit, and the comparison circuit includes：
First resistor；
Bleeder circuit is connected electrically between the power supply and ground, and the bleeder circuit includes being set to the comparison circuit
The resistance between resistance and the comparison circuit input terminal and ground between input terminal and the power supply；
The comparator, the power supply are powered for the comparator, the noninverting input of the comparator and described first
The input terminal of one end of resistance and the comparison circuit is electrically connected, and output end and the indicating circuit of the comparator are electrically connected
It connects；
When the switching circuit exports low level, the first resistor is short-circuit by the comparator, the indicating circuit
In the first working condition；
When the switching circuit disconnects, the voltage of the comparison circuit input terminal is branch pressure voltage, the translation circuit
In capacitance component carry out repeated charge, alternately output low and high level, the indicating circuit are in the second work for the comparator
Make state.
Further, the bleeder circuit includes at least two resistance, and the noninverting input of the comparison circuit is set to institute
It states between at least two resistance.
Further, the amplifying circuit includes operational amplifier, and the noninverting input of the operational amplifier receives institute
Load voltage is stated, the output end of the operational amplifier is electrically connected the input terminal of the switching circuit.
Further, the switching circuit includes zener diode and switching tube, the both ends difference of the zener diode
It is electrically connected the output end of the amplifying circuit and the base stage of the switching tube, the collector of the switching tube is electrically connected the comparison
The input terminal of circuit, the emitter ground connection of the switching tube.
A kind of Switching Power Supply, including the Signalized control circuit described in indicating circuit and any one as above.
Further, the indicating circuit includes light emitting diode.
Further, further include output rectifier and filter, the D/C voltage output circuit being connected electrically and feedback control
Circuit, the amplifying circuit are electrically connected the output rectifier and filter and the D/C voltage output circuit, the indicating circuit
It is set in the feedback control circuit.
Signalized control circuit provided by the utility model can be applied in the switching circuit, the Signalized control
Circuit realizes filling according to load by the analog device in the amplifying circuit, the switching circuit and the comparison circuit
Electricity condition adjusts the working condition of the indicating circuit, and circuit is simple and reliable, has larger cost advantage.
Description of the drawings
In order to illustrate more clearly of the utility model embodiment/mode technical solution, embodiment/mode will be described below
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is some of the utility model
Embodiment/mode for those of ordinary skill in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is the circuit block diagram of Switching Power Supply provided by the utility model.
Fig. 2 is the circuit diagram of Signalized control circuit shown in FIG. 1.
Main element symbol description
Following specific implementation mode will further illustrate the utility model in conjunction with above-mentioned attached drawing.
Specific implementation mode
In order to be more clearly understood that the above objects, features, and advantages of the utility model, below in conjunction with the accompanying drawings and have
The utility model is described in detail in body embodiment.It should be noted that in the absence of conflict, embodiments herein
And the feature in embodiment can be combined with each other.
Many details are elaborated in the following description in order to fully understand the utility model, described implementation
Example is only the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, ability
It is new to belong to this practicality for the every other embodiment that domain those of ordinary skill is obtained without making creative work
The range of type protection.
Unless otherwise defined, all of technologies and scientific terms used here by the article is led with the technology for belonging to the utility model
The normally understood meaning of technical staff in domain is identical.Terminology used in the description of the utility model herein only be
The purpose of description specific embodiment, it is not intended that in limitation the utility model.
Referring to Fig. 1, for the circuit block diagram of Switching Power Supply 100 provided by the utility model.The utility model provides one
Kind Switching Power Supply 100, including AC voltage input circuits, EMI circuits, input rectifying filter circuit, power control switching, PWM control
Circuit, transformer T1, optical coupler U1, feedback control circuit, output rectifier and filter, Signalized control circuit 120 and DC processed
Voltage follower circuit.Wherein, the AC voltage input circuits, the EMI circuits, the input rectifying filter circuit are electrically connected successively
It connects.The input rectifying filter circuit is electrically connected the power control switching, the pwm control circuit and transformer T1, described
Power control switching is electrically connected transformer T1, and the pwm control circuit is electrically connected optical coupler U1 and transformer T1, optical coupler U1's
Anode and cathode are electrically connected the feedback control circuit, the emitter ground connection of optical coupler U1, and the output rectifier and filter leads to
Cross the D/C voltage output circuit out-put supply signal, Signalized control circuit 120 is electrically connected the feedback control circuit, described
Output rectifier and filter and the D/C voltage output circuit.
Alternating current is inputted from the AC voltage input circuits, after the EMI circuits filter out electromagnetic interference, then through described defeated
Enter current rectifying and wave filtering circuit and carry out rectifying and wave-filtering, required voltage is converted by transformer T1, finally passes through the output rectification
The power supply signal of the D/C voltage output circuit output is obtained after the rectifying and wave-filtering of filter circuit.Signalized control circuit 120 and
The feedback control circuit monitors output voltage and electric current in real time, and corresponds to adjustment Switching Power Supply according to the charged state of load
The working condition of indicating circuit 180 (Fig. 2) in 100.
Referring to Fig. 2, for Signalized control circuit 120 shown in FIG. 1 and the circuit diagram of indicating circuit 180.Signal lamp control
Circuit 120 processed includes：Amplifying circuit 130, switching circuit 140 and comparison circuit 150.Wherein, amplifying circuit 130 is for obtaining institute
The load voltage of output rectifier and filter output is stated, and corresponding amplification voltage is exported after the load voltage is amplified.It opens
The amplification voltage is compared by powered-down road 140 with threshold voltage, to export corresponding switching signal；Comparison circuit 150
Input terminal is electrically connected switching circuit 140, and exports comparison signal to external indicating circuit 180 according to the switching signal.
If the amplification voltage is more than the threshold voltage, switching circuit 140 is connected, and exports low level switch letter
Number；When comparison circuit 150 receives low level switching signal, the voltage value of the comparison signal of the comparison circuit output is
First voltage, indicating circuit 180 are in the first working condition；If the amplification voltage is not more than the threshold voltage, switch electricity
Road 140 disconnects, and when comparison circuit 150 does not receive low level switching signal, the comparison signal of the comparison circuit output is
Pulse signal, the pulse signal are made of the low and high level signal being alternately present.Indicating circuit 180 is in the second work shape
State.Signalized control circuit 120 controls the working condition of indicating circuit 180 according to the load voltage values, and circuit is simple and reliable,
It is at low cost.
Specifically, amplifying circuit 130 includes operational amplifier 131, and the noninverting input 131a of operational amplifier 131 passes through
Resistance connects between the output rectifier and filter and the D/C voltage output circuit, also passes through resistance eutral grounding.Operation amplifier
It is electrically connected with feedback resistance between the reverse input end 131b of device 131 and the output end 131c of operational amplifier 131, is put with adjustment
The voltage amplification factor of big circuit 130, reverse input end 131b also pass through resistance eutral grounding.The output end of operational amplifier 131
131c is the output end 130c of amplifying circuit 130, and is electrically connected the input terminal 140a of switching circuit 140.
Switching circuit 140 includes zener diode ZD1 and switching tube Q3, and the cathode electrical connection of zener diode ZD1 is put
The base stage of the anode electrical connection switching tube Q3 of the output end 130c of big circuit 130, zener diode ZD1, the current collection of switching tube Q3
Pole is electrically connected the input terminal 150a of comparison circuit 150；The emitter of switching tube Q3 is grounded, and also passes through resistance connecting valve pipe Q3's
The base stage of collector.In present embodiment, switching tube Q3 is NPN triode, it is to be understood that switching tube Q3 can also be
NPN triode.
Comparison circuit 150 includes first resistor R22, bleeder circuit 151, comparator 152 and translation circuit 154.Comparator
152 power end connects power supply V, ground terminal ground connection, wherein power supply V can be the power supply of the D/C voltage output circuit output
Signal can also be other power supply signals.In the present embodiment, operational amplifier 131 and comparator 152 are with a pair of operation
Two independent operational amplifiers in amplifier.It is understood that in one embodiment, operational amplifier 131 with
Comparator 152 is located in two independent chips.
Translation circuit 154 includes resistance R23 and capacitance component 155, the first end electric connection resistance R23 of capacitance component 155
One end and comparator 152 reverse input end 152b, the other end ground connection of capacitance component 155, the other end of resistance R23 is electrically connected
Meet the output end 152c of comparator 152.Bleeder circuit 151 includes R20, R21, and the reverse input end 152b of comparator 152 passes through
Capacitance component 155 is grounded, and also by the output end 152c of resistance R23 connections comparator 152, capacitance component 155 includes capacitance C5
With capacitance C6.The noninverting input 152a of comparator 152 is also grounded by resistance R21 by resistance R20 electric connection of power supply V.
Indicating circuit 180 is set in the feedback control circuit, and indicating circuit 180 includes light emitting diode D4 and resistance
The anode of R24, light emitting diode D4 are electrically connected with power supply V, and cathode is connected to the output end of comparator 152 by resistance R24
152c152c also connects the positive input 152a of the comparator 152 by resistance R24 and R22.
When Signalized control circuit 120 works, comparison circuit 150 is exported according to the switching signal that switching circuit 140 exports
Corresponding comparison signal, to control the working condition of indicating circuit 180.
When load is being charged, charging current is more than predetermined current, and amplifying circuit 130 is electric from the output rectification filter
The load voltage obtained between road and the D/C voltage output circuit is more than predeterminated voltage, and the load voltage passes through amplifying circuit
The amplification voltage is obtained after 130 amplification, and the amplification voltage is more than zener diode ZD1 in switching circuit 140
The voltage of voltage regulation value of voltage of voltage regulation value, zener diode ZD1 is the threshold voltage.The base stage of switching tube Q3 is high level,
Switching tube Q3 conductings so that the collector of the switching tube Q3 becomes low level, and resistance R21 and comparator 152 are by first resistor
R22 short circuits, so that the in-phase input end of the comparator 152 becomes low level.The output end 152c outputs of comparator 152
The voltage value of comparison signal be first voltage between power supply V and ground, the first voltage is that resistance R24 and first are electric
Partial pressure values of the R22 to power supply V is hindered, at this point, the light emitting diode D4 shines so that indicating circuit 180 is in the first work shape
State.Since the output end 152c of the comparator 152 may export always first level so that the indicating circuit
Light emitting diode D4 in 180 is always on.
When loading charging complete, charging current is not more than the predetermined current, and amplifying circuit 130 is from the output rectification
The load voltage obtained between filter circuit and the D/C voltage output circuit is not more than predeterminated voltage, and the load voltage passes through
The amplification voltage is obtained after the amplification of amplifying circuit 130, the amplification voltage is not more than zener diode in switching circuit 140
The voltage of voltage regulation value of the voltage of voltage regulation value of ZD1, zener diode ZD1 is the threshold voltage.Switching tube Q3 shutdowns, it is more electric
The voltage value of the input terminal 150a on road 150 is branch pressure voltages of the resistance R20 and resistance R21 in bleeder circuit 151 to power supply V.
When original state, the noninverting input 152a voltages (branch pressure voltage) of comparator 152 are more than the reversed of comparator 152
Input terminal 152b voltages, therefore the comparison signal voltage of the output end 152c outputs of comparator 152 is identical as power supply V, for high electricity
Flat, the light emitting diode D4 in indicating circuit 180 does not work, at this point, the high level of the output end 152c outputs of comparator 152 may be used also
It charges in the first preset time for the capacitance component 155 in translation circuit 154, i.e., it is described in the first preset time relatively to believe
Number it is high level, light emitting diode D4 do not work.In present embodiment, capacitance component 155 includes the capacitance C5 and capacitance C6 of parallel connection,
In other embodiments, it is not limited thereto.
Capacitance component 155 charges after the first preset time period, and capacitance component 155 charges to the reversed input of comparator 152
152b voltages are held to be more than the noninverting input 152a voltages of comparator 152, the comparison letter of the output end 152c outputs of comparator 152
Number it is low level, the light emitting diode in indicating circuit 180 is lighted.At this point, the capacitance component 155 in translation circuit 154 carries out
Discharge operation, to export discharge voltage, in the second preset time, the electricity of the capacitance component 155 in translation circuit 154 is gradual
It reduces, the comparison signal keeps low level, light emitting diode D4 to light.Comparator 152 is anti-after second preset time
It is less than the noninverting input 152a voltages of comparator 152 to input terminal 152b voltages, the output end 152c outputs of comparator 152
Light emitting diode D4 in the comparison signal indicating circuit 180 of high level does not work, and translation circuit 154 also begins to carry out charging behaviour
Make.In this way, 155 repeated charge of capacitance component in translation circuit 154, alternately output low and high level, instruction are electric for comparator 152
Road 180 is in the second working condition, the LED flash in indicating circuit 180.
Signalized control circuit 120 provided by the utility model passes through amplifying circuit 130, switching circuit 140 and more electric
Analog device in road 150 realizes the working condition that indicating circuit is adjusted according to the charged state of load, and circuit is simple and reliable, tool
There is larger cost advantage.
It is obvious to a person skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and
And without departing substantially from the spirit or essential attributes of the utility model, it can realize that this practicality is new in other specific forms
Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this practicality is new
The range of type is indicated by the appended claims rather than the foregoing description, it is intended that containing in the equivalent requirements of the claims will be fallen
All changes in justice and range are included in the utility model.Any reference numeral in claim should not be considered as limitation
Involved claim.Furthermore, it is to be understood that one word of " comprising " is not excluded for other units or step, odd number is not excluded for plural number.Device
The multiple devices stated in claim can also be realized by the same device or system by software or hardware.First,
Second equal words are used to indicate names, and are not represented any particular order.
Finally it should be noted that above example is merely intended for describing the technical solutions of the present application, but not for limiting the present application, although
The utility model is described in detail with reference to preferred embodiment, it will be understood by those of ordinary skill in the art that, it can be right
The technical solution of the utility model is modified or equivalent replacement, without departing from the spirit and model of technical solutions of the utility model
It encloses.
Claims (10)
1. a kind of Signalized control circuit, which is characterized in that including：
Amplifying circuit, the load voltage for obtaining load, and export corresponding amplification voltage after the load voltage is amplified；
The amplification voltage is compared by switching circuit with threshold voltage；
The input terminal of comparison circuit, the comparison circuit is electrically connected the switching circuit, and exports comparison signal to external finger
Show circuit；
If the amplification voltage is more than the threshold voltage, the switching circuit conducting, and exports low level switching signal, institute
The voltage value for stating comparison signal is first voltage, and the indicating circuit is in the first working condition；
If the amplification voltage is not more than the threshold voltage, the switching circuit disconnects, and the comparison signal is pulse signal,
The indicating circuit is in the second working condition.
2. Signalized control circuit as described in claim 1, which is characterized in that the comparison circuit further includes translation circuit；
In the case where the indicator light is in the second working condition,
When the comparison signal is high level, the translation circuit is delayed after the first preset time, controls the comparison circuit
Export low level comparison signal；
When the comparison signal is low level, the translation circuit is delayed after the second preset time, controls the comparison circuit
Export the comparison signal of high level.
3. Signalized control circuit as claimed in claim 2, which is characterized in that the comparison circuit further includes comparator, institute
It includes resistance and capacitance component to state translation circuit, and the first end of the capacitance component is electrically connected one end of the resistance and the ratio
Compared with the reverse input end of device, the other end of the capacitance component is grounded, and the other end of the resistance is electrically connected the comparator
Output end.
4. Signalized control circuit as claimed in claim 3, which is characterized in that power supply is powered for the indicating circuit, described
Comparison circuit includes：
First resistor；
Bleeder circuit is connected electrically between the power supply and ground, and the bleeder circuit includes being set to the comparison circuit input
The resistance between resistance and the comparison circuit input terminal and ground between end and the power supply；
The comparator, the power supply are powered for the comparator, the noninverting input of the comparator and the first resistor
One end and the comparison circuit input terminal electrical connection, the output end of the comparator is electrically connected with the indicating circuit；
When the switching circuit exports low level, comparator short circuit, the indicating circuit are in by the first resistor
First working condition；
When the switching circuit disconnects, the voltage of the comparison circuit input terminal is branch pressure voltage, in the translation circuit
Capacitance component carries out repeated charge, and alternately output low and high level, the indicating circuit are in the second work shape to the comparator
State.
5. Signalized control circuit as claimed in claim 4, which is characterized in that the bleeder circuit includes at least two resistance,
The noninverting input of the comparison circuit is set between at least two resistance.
6. Signalized control circuit as described in claim 1, which is characterized in that the amplifying circuit includes operational amplifier,
The noninverting input of the operational amplifier receives the load voltage, is opened described in the output end electrical connection of the operational amplifier
The input terminal on powered-down road.
7. Signalized control circuit as described in claim 1, which is characterized in that the switching circuit include zener diode with
The both ends of switching tube, the zener diode are electrically connected the output end of the amplifying circuit and the base stage of the switching tube,
The collector of the switching tube is electrically connected the input terminal of the comparison circuit, the emitter ground connection of the switching tube.
8. a kind of Switching Power Supply, which is characterized in that the signal lamp including indicating circuit and as described in claim 1-7 any one
Control circuit.
9. Switching Power Supply as claimed in claim 8, which is characterized in that the indicating circuit includes light emitting diode.
10. Switching Power Supply as claimed in claim 8, which is characterized in that further include output rectifier and filter, be connected electrically
D/C voltage output circuit and feedback control circuit, the amplifying circuit is electrically connected the output rectifier and filter and the DC
Voltage follower circuit, the indicating circuit are set in the feedback control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820233070.5U CN207910681U (en) | 2018-02-08 | 2018-02-08 | Signalized control circuit and Switching Power Supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820233070.5U CN207910681U (en) | 2018-02-08 | 2018-02-08 | Signalized control circuit and Switching Power Supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207910681U true CN207910681U (en) | 2018-09-25 |
Family
ID=63560571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820233070.5U Active CN207910681U (en) | 2018-02-08 | 2018-02-08 | Signalized control circuit and Switching Power Supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207910681U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112953478A (en) * | 2021-03-19 | 2021-06-11 | 苏州贝昂科技有限公司 | Switch controller and electronic equipment |
-
2018
- 2018-02-08 CN CN201820233070.5U patent/CN207910681U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112953478A (en) * | 2021-03-19 | 2021-06-11 | 苏州贝昂科技有限公司 | Switch controller and electronic equipment |
| CN112953478B (en) * | 2021-03-19 | 2022-06-07 | 苏州贝昂科技有限公司 | Switch controller and electronic equipment |
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