CN208353213U - A kind of Switching Power Supply start-up circuit - Google Patents
A kind of Switching Power Supply start-up circuit Download PDFInfo
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- CN208353213U CN208353213U CN201820522763.6U CN201820522763U CN208353213U CN 208353213 U CN208353213 U CN 208353213U CN 201820522763 U CN201820522763 U CN 201820522763U CN 208353213 U CN208353213 U CN 208353213U
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- triode
- power supply
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- signal
- voltage stabilizing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model provides a kind of Switching Power Supply start-up circuit, is related to switch power technology field.The circuit includes control module and Voltage stabilizing module, and Voltage stabilizing module is electrically connected with the control signal output of control module；And first voltage signal is provided so that the control module is in standby for the control module by Voltage stabilizing module, so that control module can determine whether the input voltage obtained is greater than presetting voltage threshold, if it is, control signal is then generated so that Voltage stabilizing module output second voltage signal is so that control module is in normal operating conditions, and second voltage signal is greater than first voltage signal；So that Switching Power Supply start-up circuit is standby or export different voltage under working normally in low power consumpting controling circuit, and when low power consumpting controling circuit is standby, only starts the lesser accessory power supply of power consumption, achieved the effect that standby mode low-power consumption.
Description
Technical field
The utility model relates to switch power technology fields, in particular to a kind of Switching Power Supply start-up circuit.
Background technique
In field of switch power, control circuit or control chip are the control cores of whole system, and equipment is needed in power
Supply control power supply before circuit work.Generally, control circuit needs to be indicated according to outside, such as starts halt instruction or output
Voltage reference value etc. or external environment such as input how the decision of overvoltage/undervoltage information exports control signal, and supply to control section
The circuit of electricity is start-up circuit.
But in the prior art, start-up circuit is generally simply powered using voltage regulator circuit, or directly with low power auxiliary
Power supply power supply is helped, power consumption is larger.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of Switching Power Supply start-up circuits, to solve the above problems.
The utility model is realized in this way:
A kind of Switching Power Supply start-up circuit, the Switching Power Supply start-up circuit include: control module, Voltage stabilizing module and electricity
Acquisition module is pressed, the Voltage stabilizing module is electrically connected with the control signal output of the control module, the voltage acquisition module
It is electrically connected with the power supply signal output end of the control module；
The voltage acquisition module is for acquiring the input voltage for being input to the control module；
The Voltage stabilizing module be used to for the control module provide first voltage signal so that the control module in
Machine state；
The control module is used for when the input voltage is greater than presetting voltage threshold, generates control signal, and
The control signal is transmitted to the Voltage stabilizing module；
The Voltage stabilizing module exports second voltage signal to the control module, so that described for responsive control signal
Control module is in normal operating conditions, wherein the second voltage signal is greater than the first voltage signal.
Further, the Voltage stabilizing module includes: the first signal input part, second signal input terminal, control signal input
End, the first triode, the second triode, diode and metal-oxide-semiconductor, the drain electrode of first signal input part and the metal-oxide-semiconductor
Electrical connection, the grid of the metal-oxide-semiconductor is electrically connected with the collector of first triode, the emitter of first triode and
Second signal input terminal electrical connection, the diode is in parallel with a triode, the base stage of first triode and
Control signal input electrical connection, the source electrode of the metal-oxide-semiconductor are electrically connected with the emitter of second triode, and described the
The base stage of two triodes is electrically connected with the cathode of the diode, and the collector of second triode and the second signal are defeated
Enter end electrical connection.
Further, the Voltage stabilizing module further includes power supply signal output end, the power supply signal output end and described the
The emitter of two triodes is electrically connected；
The power supply signal output end is used to export described the when first triode cut-off, metal-oxide-semiconductor conducting
One voltage signal is to the control module.
Further, the Voltage stabilizing module further includes first capacitor, and the first capacitor is in parallel with second triode.
Further, the Voltage stabilizing module further includes power supply signal output end, the power supply signal output end and described the
The emitter of two triodes is electrically connected；
The control signal input is for input control signal to first triode；
First triode is used for the conducting when receiving the control signal；
The metal-oxide-semiconductor when first triode ON for ending；
Second triode is used to be connected when metal-oxide-semiconductor cut-off；
The power supply signal output end is for exporting the second voltage signal to the control module.
Further, the Voltage stabilizing module further includes first resistor, and the first resistor is series at the source of the metal-oxide-semiconductor
Between pole and the emitter of second triode.
Further, the Voltage stabilizing module further includes second resistance, and it is defeated that the second resistance is series at first signal
Enter between end and the cathode of the diode.
Further, the Voltage stabilizing module further includes 3rd resistor, and it is defeated that the 3rd resistor is series at the control signal
Enter between end and the base stage of first triode.
Further, the Voltage stabilizing module further includes the second capacitor, second capacitor and the diodes in parallel.
Further, the Voltage stabilizing module further includes third capacitor, and the third capacitor is series at second triode
Collector and the second signal input terminal between.
Compared with the prior art, the utility model has the following beneficial effects: a kind of Switching Power Supply provided by the utility model
Start-up circuit, including control module and Voltage stabilizing module, Voltage stabilizing module are electrically connected with the control signal output of control module；And
First voltage signal is provided so that the control module is in standby, to make by Voltage stabilizing module for the control module
Obtaining control module can determine whether the input voltage obtained is greater than presetting voltage threshold, if it is, generating control signal
So that Voltage stabilizing module output second voltage signal is so that control module be in normal operating conditions, and second voltage signal is greater than the
One voltage signal；So that Switching Power Supply start-up circuit is standby or export under working normally different in low power consumpting controling circuit
Voltage only start the lesser accessory power supply of power consumption, reached standby mode low-power consumption and when low power consumpting controling circuit is standby
Effect.
To enable the above objects, features, and advantages of the utility model to be clearer and more comprehensible, preferred embodiment is cited below particularly, and
Cooperate appended attached drawing, is described in detail below.
Detailed description of the invention
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Usually here in attached drawing description and
The component of the utility model embodiment shown can be arranged and be designed with a variety of different configurations.
Therefore, requirement is not intended to limit to the detailed description of the embodiments of the present invention provided in the accompanying drawings below
The scope of the utility model of protection, but it is merely representative of the selected embodiment of the utility model.Based in the utility model
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all
Belong to the range of the utility model protection.
Fig. 1 shows a kind of functional block diagram of Switching Power Supply start-up circuit provided by the utility model.
Fig. 2 shows the circuit diagrams of Voltage stabilizing module provided by the utility model.
Icon: 100- Switching Power Supply start-up circuit；210- control module；220- Voltage stabilizing module.
Specific embodiment
Below in conjunction with attached drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out clear
Chu is fully described by, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole realities
Apply example.The component of the utility model embodiment being usually described and illustrated herein in the accompanying drawings can be come with a variety of different configurations
Arrangement and design.
Therefore, requirement is not intended to limit to the detailed description of the embodiments of the present invention provided in the accompanying drawings below
The scope of the utility model of protection, but it is merely representative of the selected embodiment of the utility model.Reality based on the utility model
Apply example, those skilled in the art's every other embodiment obtained without making creative work belongs to
The range of the utility model protection.
In the description of the present invention, it should be noted that similar label indicates similar in following attached drawing with letter
, therefore, once being defined in a certain Xiang Yi attached drawing, then do not need further to define it in subsequent attached drawing
And explanation.Meanwhile term " first ", " second " etc. are only used for distinguishing description in the description of the present invention, and cannot understand
For indication or suggestion relative importance.
The utility model embodiment provides a kind of Switching Power Supply start-up circuit 100, for powering for control module 210,
And different input voltages is provided for it according to the state of control module 210, to realize the purpose of standby mode low-power consumption.It please join
Fig. 1 is read, is the functional block diagram of Switching Power Supply start-up circuit 100 provided by the embodiment of the utility model.Switching Power Supply starting
Circuit 100 includes: control module 210 and Voltage stabilizing module 220.Wherein, the control of Voltage stabilizing module 220 and control module 210 is believed
The electrical connection of number output end.
Voltage stabilizing module 220 is used to provide first voltage signal for control module 210 so that control module 210 is in standby
State；Or for providing second voltage signal to control module 210, so that control module 210 is in just for control module 210
Normal working condition.
It should be noted that second voltage signal is greater than first voltage signal in a kind of preferred embodiment.
Control module 210 is used for when input voltage is greater than presetting voltage threshold, generates control signal, and will control
Signal is transmitted to Voltage stabilizing module 220, exports second voltage signal to control Voltage stabilizing module 220.
In a kind of preferred embodiment, operational amplifier can be used in control module 210, and to serve as comparator above-mentioned to realize
Function.
It should be noted that in the present embodiment, which is high level signal.
Referring to Fig. 2, being the circuit diagram of Voltage stabilizing module 220.Voltage stabilizing module 220 includes the first signal input part J1, second
Signal input part J2, control signal input S1, the first triode Q1, the second triode Q2, diode D1 and metal-oxide-semiconductor M1,
First signal input part J1 is electrically connected with the drain electrode of MOS pipe M1, the collector electricity of the grid of metal-oxide-semiconductor M1 and the first triode Q1
Connection, the emitter of the first triode Q1 are electrically connected with second signal input terminal J2, and diode D1 is in parallel with a triode, and first
The base stage of triode Q1 is electrically connected with control signal input S1, the emitter electricity of the source electrode of MOS pipe M1 and the second triode Q2
Connection, the base stage of the second triode Q2 are electrically connected with the cathode of diode D1, the collector and second signal of the second triode Q2
Input terminal J2 electrical connection.
In addition, Voltage stabilizing module 220 further includes power supply signal output end V1, power supply signal output end V1 and the second triode
The emitter and control module 210 of Q2 is electrically connected.Power supply signal output end V1 is for exporting first voltage signal or second voltage
Signal is to control module 210.
Wherein, the first signal input part J1, second signal input terminal J2 be for introducing input power, as external power supply
Signal end.
It should be noted that diode D1 is zener diode, for driving MOS pipe M1 after pressure stabilizing.
First triode Q1, the second triode Q2 and metal-oxide-semiconductor M1 are used under the control of control module 210, are changed certainly
The on state of body, to realize the switching of power supply signal output end V1 output voltage state.
In a kind of preferred embodiment, Voltage stabilizing module 220 further includes first capacitor C1, first capacitor C1 and the two or three pole
Pipe Q2 is in parallel.
It is to be appreciated that when metal-oxide-semiconductor M1 conducting, the first signal input part J1, metal-oxide-semiconductor M1, first capacitor C1 and the
Binary signal input terminal J2 forms closed circuit, thus charge for first capacitor C1, power supply signal output end V1 output at this time first
Voltage signal；And when metal-oxide-semiconductor M1 cut-off, the first signal input part J1, metal-oxide-semiconductor M1, first capacitor C1 and second signal are defeated
Enter to hold J2 formed circuit disconnect, at this time first capacitor C1 storage electric energy still can guarantee power supply signal output end V1 have compared with
Big voltage value.
In a kind of preferred embodiment, Voltage stabilizing module 220 further includes the second capacitor C2, the second capacitor C2 and diode D1
It is in parallel.Second capacitor C2 plays the role of filtering, eliminates the coupling for passing through power supply.
In a kind of preferred embodiment, Voltage stabilizing module 220 further includes third capacitor C3, and third capacitor C3 is series at second
Between the collector and second signal input terminal J2 of triode Q2.
In a kind of preferred embodiment, Voltage stabilizing module 220 further includes first resistor R1, and first resistor R1 is series at MOS
Between the source electrode of pipe M1 and the emitter of the second triode Q2.
In a kind of preferred embodiment, Voltage stabilizing module 220 further includes second resistance R2, and second resistance R2 is series at first
Between signal input part J1 and the cathode of diode D1.
In a kind of preferred embodiment, Voltage stabilizing module 220 further includes 3rd resistor R3, and 3rd resistor R3 is series at control
Between signal input part S1 and the base stage of the first triode Q1.
The principles of the present invention are as follows:
When voltage regulator circuit is in original state, control signal input S1 is low level, at this time at the first triode Q1
In off state；At the same time, input voltage is by generating voltage after the first triode Q1 pressure stabilizing, so that metal-oxide-semiconductor M1 be driven to lead
It is logical, by generating first voltage signal after linear voltage stabilization, and exported by power supply signal output end V1 to control module 210, so that
Control module 210 is in standby.
When control signal detection to input voltage is greater than presetting voltage threshold, output high level signal to the one or three
The base stage of pole pipe Q1, driving the first triode Q1 conducting, and make metal-oxide-semiconductor M1 grid and the second triode Q2 collector
Voltage is lower, so that metal-oxide-semiconductor M1 loses driving voltage and ends, metal-oxide-semiconductor M1 is no longer flow through electric current；At the same time, first capacitor
C1 guarantees that the voltage of power supply signal output end V1 is still larger, and the voltage of the second triode Q2 emitter is made to be higher than the electricity of collector
Pressure, so that the second triode Q2 is connected, accessory power supply signal output end V1 exports second voltage signal to control module 210, makes
Control module 210 can work normally.
In conclusion a kind of Switching Power Supply start-up circuit provided by the utility model, including control module and pressure stabilizing mould
Block, Voltage stabilizing module are electrically connected with the control signal output of control module；And it is provided by Voltage stabilizing module for the control module
First voltage signal is so that the control module is in standby, so that control module can determine whether the input voltage obtained
Whether be greater than presetting voltage threshold, if it is, generate control signal so that Voltage stabilizing module export second voltage signal with
Control module is set to be in normal operating conditions, and second voltage signal is greater than first voltage signal；So that Switching Power Supply opens
Dynamic circuit is standby or export different voltage under working normally in low power consumpting controling circuit, and when low power consumpting controling circuit is standby
When, only start the lesser accessory power supply of power consumption, achievees the effect that standby mode low-power consumption.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (10)
1. a kind of Switching Power Supply start-up circuit, which is characterized in that the Switching Power Supply start-up circuit includes: control module and steady
Die block, the Voltage stabilizing module are electrically connected with the control signal output of the control module；
The Voltage stabilizing module is used to provide first voltage signal so that the control module is in standby shape for the control module
State；
The control module is used for raw when the input voltage is greater than presetting voltage threshold for obtaining input voltage
At control signal, and the control signal is transmitted to the Voltage stabilizing module；
The Voltage stabilizing module exports second voltage signal to the control module, so that the control for responsive control signal
Module is in normal operating conditions, wherein the second voltage signal is greater than the first voltage signal.
2. Switching Power Supply start-up circuit according to claim 1, which is characterized in that the Voltage stabilizing module includes: the first letter
Number input terminal, second signal input terminal, control signal input, the first triode, the second triode, diode and metal-oxide-semiconductor,
First signal input part is electrically connected with the drain electrode of the metal-oxide-semiconductor, the collection of the grid of the metal-oxide-semiconductor and first triode
Electrode electrical connection, the emitter of first triode is electrically connected with the second signal input terminal, the diode with it is described
One triode is in parallel, and the base stage of first triode is electrically connected with the control signal input, the source electrode of the metal-oxide-semiconductor and
The emitter of second triode is electrically connected, and the base stage of second triode is electrically connected with the cathode of the diode, institute
The collector for stating the second triode is electrically connected with the second signal input terminal.
3. Switching Power Supply start-up circuit according to claim 2, which is characterized in that the Voltage stabilizing module further includes power supply letter
Number output end, the power supply signal output end are electrically connected with the emitter of second triode；
The power supply signal output end is used to export first electricity when first triode cut-off, metal-oxide-semiconductor conducting
Press signal to the control module.
4. Switching Power Supply start-up circuit according to claim 2, which is characterized in that the Voltage stabilizing module further includes the first electricity
Hold, the first capacitor is in parallel with second triode.
5. Switching Power Supply start-up circuit according to claim 4, which is characterized in that the Voltage stabilizing module further includes power supply letter
Number output end, the power supply signal output end are electrically connected with the emitter of second triode；
The control signal input is for input control signal to first triode；
First triode is used for the conducting when receiving the control signal；
The metal-oxide-semiconductor when first triode ON for ending；
Second triode is used to be connected when metal-oxide-semiconductor cut-off；
The power supply signal output end is for exporting the second voltage signal to the control module.
6. Switching Power Supply start-up circuit according to claim 2, which is characterized in that the Voltage stabilizing module further includes the first electricity
Resistance, the first resistor are series between the source electrode of the metal-oxide-semiconductor and the emitter of second triode.
7. Switching Power Supply start-up circuit according to claim 2, which is characterized in that the Voltage stabilizing module further includes the second electricity
Resistance, the second resistance are series between first signal input part and the cathode of the diode.
8. Switching Power Supply start-up circuit according to claim 2, which is characterized in that the Voltage stabilizing module further includes third electricity
Resistance, the 3rd resistor are series between the control signal input and the base stage of first triode.
9. Switching Power Supply start-up circuit according to claim 2, which is characterized in that the Voltage stabilizing module further includes the second electricity
Hold, second capacitor and the diodes in parallel.
10. Switching Power Supply start-up circuit according to claim 2, which is characterized in that the Voltage stabilizing module further includes third
Capacitor, the third capacitor are series between the collector of second triode and the second signal input terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820522763.6U CN208353213U (en) | 2018-04-12 | 2018-04-12 | A kind of Switching Power Supply start-up circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820522763.6U CN208353213U (en) | 2018-04-12 | 2018-04-12 | A kind of Switching Power Supply start-up circuit |
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| Publication Number | Publication Date |
|---|---|
| CN208353213U true CN208353213U (en) | 2019-01-08 |
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ID=64886205
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| CN201820522763.6U Active CN208353213U (en) | 2018-04-12 | 2018-04-12 | A kind of Switching Power Supply start-up circuit |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109767743A (en) * | 2019-03-27 | 2019-05-17 | 昆山龙腾光电有限公司 | Driving circuit and its display device |
| CN111181372A (en) * | 2020-03-02 | 2020-05-19 | 北京曙光航空电气有限责任公司 | Direct current bus current limiting circuit |
| CN111478447A (en) * | 2020-05-13 | 2020-07-31 | 武汉盛帆电子股份有限公司 | Concentrator and power supply method |
| CN116600375A (en) * | 2023-07-18 | 2023-08-15 | 荣耀终端有限公司 | Electronic device power supply circuit and electronic equipment |
-
2018
- 2018-04-12 CN CN201820522763.6U patent/CN208353213U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109767743A (en) * | 2019-03-27 | 2019-05-17 | 昆山龙腾光电有限公司 | Driving circuit and its display device |
| CN111181372A (en) * | 2020-03-02 | 2020-05-19 | 北京曙光航空电气有限责任公司 | Direct current bus current limiting circuit |
| CN111181372B (en) * | 2020-03-02 | 2021-02-02 | 北京曙光航空电气有限责任公司 | Direct current bus current limiting circuit |
| CN111478447A (en) * | 2020-05-13 | 2020-07-31 | 武汉盛帆电子股份有限公司 | Concentrator and power supply method |
| CN116600375A (en) * | 2023-07-18 | 2023-08-15 | 荣耀终端有限公司 | Electronic device power supply circuit and electronic equipment |
| CN116600375B (en) * | 2023-07-18 | 2023-10-20 | 荣耀终端有限公司 | Electronic device power supply circuit and electronic equipment |
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