CN202889233U - Low-power-consumption power supply circuit - Google Patents
Low-power-consumption power supply circuit Download PDFInfo
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- CN202889233U CN202889233U CN201220529862XU CN201220529862U CN202889233U CN 202889233 U CN202889233 U CN 202889233U CN 201220529862X U CN201220529862X U CN 201220529862XU CN 201220529862 U CN201220529862 U CN 201220529862U CN 202889233 U CN202889233 U CN 202889233U
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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 relates to a low-power-consumption power supply circuit, comprising a rectifier circuit, a voltage stabilizing circuit, a pulse generation circuit, a switch circuit and a flyback circuit. An input end of the rectifier circuit is connected with a power transmission line of a power grid. An input end of the switch circuit is connected with an output end of the rectifier circuit. An output end of the switch circuit is connected with an input end of the flyback circuit. An output end of the flyback circuit is connected with an input end of the voltage stabilizing circuit. An output end of the voltage stabilizing circuit is connected with a load of the power supply circuit. The output end of the flyback circuit is also connected with an input end of the pulse generation circuit. An output end of the pulse generation circuit is connected with a control end of the switch circuit. By adopting the above circuit structure, not only low current and low power consumption of the power supply circuit are realized, but also the output current of the power supply circuit changes along with the change of the load. Therefore, the power supply circuit of the utility model is suitable for various electronic products with relatively high requirement of low standby power consumption.
Description
Technical field
The utility model relates to a kind of power circuit, particularly relates to the small power circuit of a kind of power consumption.
Background technology
Advocate energetically in country under the background of green energy conservation, a lot of very little electrical equipment of standby current need the small power supply of power consumption supporting with it.But concerning present existing power technology, himself power consumption is often larger when holding state, the electronic wall wall switch of one wire system particularly, under holding state when input current surpasses 100 microamperes, just cause easily electricity-saving lamp aura flicker that it is controlled, thus present known power technology often can not be applied to similar electronic wall wall switch such for stand-by power consumption the electronic product of strict demand is arranged.The patent No. is that 200320118962.4 Chinese utility model patent file discloses a kind of " power circuit of little consumption digital wireless multi-controlled switch ", this circuit limits the method for input current with pressure, although solved the problem that electronic wall wall switch control electricity-saving lamp glimmers under holding state, but the input and output of this power circuit are subject to strict restriction under holding state, can't follow the variation of load and change, versatility is relatively poor, and this power circuit has used electronic transformer and relay, volume is larger, is difficult to realize microminiaturized.
The utility model content
For overcoming above the deficiencies in the prior art, it is small that the technical problems to be solved in the utility model provides a kind of oneself power consumption, and can follow load variations and change the power circuit of output current.
The technical solution of the utility model is:
The power circuit that a kind of power consumption is small, comprise rectification circuit and voltage stabilizing circuit, wherein the input of rectification circuit is connected with the transmission line of electrical network, this power circuit also comprises pulse generating circuit, switching circuit and freewheeling circuit, wherein the input of switching circuit is connected with the output of rectification circuit, the output of switching circuit is connected with the input of freewheeling circuit, and the output of freewheeling circuit is connected with the input of voltage stabilizing circuit, and the output of voltage stabilizing circuit connects the power circuit load.The output of freewheeling circuit also is connected with the input of pulse generating circuit simultaneously, and the output of pulse generating circuit is connected with the control end of switching circuit.
Above-mentioned power circuit has adopted the CMOS integrated schmidt trigger in the pulse generating circuit wherein.
Above-mentioned power circuit, it is the integrated trigger U1 of CD40106 that pulse generating circuit wherein adopts model, also comprise resistance R 5, R6, voltage stabilizing didoe D4, diode D5 and capacitor C 5, wherein the pin one 4 of integrated trigger U1 connects power positive end, pin 7 ground connection, pin 9 directly links to each other with pin one 0, pin one 1 directly links to each other with pin one 2, pin one 2 connects the positive pole of diode D5 by resistance R 5 simultaneously, pin one 2 connects again the negative pole of diode D5 by resistance R 6, the negative pole of diode D5 is connected with the pin one 3 of integrated trigger U1 respectively again simultaneously, be connected with the positive pole of voltage stabilizing didoe D4, and by capacitor C 5 ground connection, the negative pole of voltage stabilizing didoe D4 is connected with the output of freewheeling circuit, and the pin 8 of integrated trigger U1 is connected with the control end of switching circuit.
Above-mentioned power circuit, freewheeling circuit wherein comprises inductance L 1, capacitor C 3, diode D1, D3, the positive pole of diode D1 is connected with the output of switching circuit, and the negative pole of diode D1 is connected with the end that the negative pole of diode D3 is connected with inductance L respectively, the plus earth of diode D3, the other end of inductance L 1 is by capacitor C 3 ground connection, and the negative pole of this end of inductance L 1 voltage stabilizing didoe D4 of being connected with pulse generating circuit with the input of voltage stabilizing circuit simultaneously respectively again is connected.
Above-mentioned power circuit, rectification circuit wherein are full bridge rectifier.
Above-mentioned power circuit, voltage stabilizing circuit wherein adopts the LDO low pressure difference linear voltage regulator.
The beneficial effects of the utility model are:
1, the utility model is by adopting the foregoing circuit structure, break-make by pulse generating circuit FEEDBACK CONTROL switching circuit, thereby the break-make of the direct current transmission of control after rectification, and the effect of cooperation freewheeling circuit, thereby not only realized low current and the low-power consumption of power circuit, and the output current of having realized power circuit can be followed the variation of load and changed;
2, the utility model is easy to integrated various minisize components by employing and makes up circuit, thereby is easy to realize the microminiaturization of power circuit and integrated, the convenient application;
3, circuit structure of the present utility model is simple, rationally, not only can be applied to the electronic wall wall switch, can also be applied to other the electronic product that the standby low-power consumption is had relatively high expectations.
Description of drawings
Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.
Fig. 1 is schematic block circuit diagram of the present utility model;
Fig. 2 is integrated circuit principle schematic of the present utility model;
Fig. 3 is the circuit theory diagrams of pulse generating circuit of the present utility model.
Among the figure: rectification circuit 1, switching circuit 2, pulse generating circuit 3, freewheeling circuit 4, voltage stabilizing circuit 5.
Embodiment
Embodiment one: as shown in Figure 1, the power circuit that a kind of power consumption is small, comprise rectification circuit 1, switching circuit 2, pulse generating circuit 3, freewheeling circuit 4 and voltage stabilizing circuit 5, the input of rectification circuit 1 is connected with the transmission line of electrical network, and the input of switching circuit 2 is connected with the output of rectification circuit 1, and the output of switching circuit 2 is connected with the input of freewheeling circuit 4, the output of freewheeling circuit 4 is connected with the input of voltage stabilizing circuit 5, and the output of voltage stabilizing circuit 5 connects the power circuit load.Simultaneously, the output of freewheeling circuit 4 also is connected with the input of pulse generating circuit 3, and the output of pulse generating circuit 3 is connected with the control end of switching circuit 2.
When above-mentioned power circuit work, civil power is converted into direct current through the rectification of rectification circuit 1, and switching circuit 2 responsible these direct currents of break-make are connected with freewheeling circuit 4.Pulse generating circuit 3 is responsible for producing the high frequency positive pulse, 2 work of control switch circuit.Switching circuit 2 is with the high-frequency connecting and disconnecting, and when switching circuit 2 was connected, direct current was by freewheeling circuit 4, and this moment, galvanic Conversion of Energy was magnetic field energy; When switching circuit 2 disconnected, direct current was truncated, and the magnetic field energy around the inductance is converted into electric energy, thereby supplied with the required electric energy of subsequent conditioning circuit by freewheeling circuit 4.Simultaneously, the magnitude of voltage of the output of freewheeling circuit 4 feeds back to pulse generating circuit 3, and after this magnitude of voltage was higher than certain value, pulse generating circuit 3 no longer produced pulse, break-off.Voltage stabilizing circuit 5 is used for obtaining stable low-voltage DC.
Embodiment two: as shown in Figures 2 and 3, for above-mentioned power circuit, rectification circuit 1 wherein can adopt the circuit that is comprised of full-bridge rectifier Z1, resistance R 1 and capacitor C 1, C2, civil power (220V alternating current) is after full-bridge rectification and filtering, can be converted to the direct current that amplitude is about 311V, thereby export to follow-up switching circuit 2; Switching circuit 2 can adopt the circuit that is comprised of triode Q1, Q2 and resistance R 2, R3, R4; Voltage stabilizing circuit 5 can adopt the circuit that is comprised of LDO low pressure difference linear voltage regulator LDO1 and capacitor C 4.
It is the circuit that CMOS integrated schmidt trigger U1, resistance R 5, R6, diode D5, voltage stabilizing didoe D4 and the capacitor C 5 of CD40106 forms that pulse generating circuit 3 can adopt by preferred model.Certainly, above-mentioned trigger U1 also can adopt the CMOS integrated schmidt trigger of other models that meet parameter request.In pulse generating circuit 3, the pin one 4 of integrated trigger U1 connects power positive end, pin 7 ground connection, pin 9 directly links to each other with pin one 0, pin one 1 directly links to each other with pin one 2, pin one 2 connects the positive pole of diode D5 by resistance R 5 simultaneously, pin one 2 connects again the negative pole of diode D5 by resistance R 6, the negative pole of diode D5 is connected with the pin one 3 of integrated trigger U1 respectively again simultaneously, be connected with the positive pole of voltage stabilizing didoe D4, and by capacitor C 5 ground connection, the negative pole of voltage stabilizing didoe D4 is connected with the output of freewheeling circuit 4, the pin 8 of integrated trigger U1 and the control end of switching circuit 2, namely as shown in Figure 2 the left end of resistance R 4 connects.
When foregoing circuit was worked, when the triode Q2 conducting in the pulse generating circuit 3 control switch circuit 2, the direct current after rectification just acted on inductance L 1 by triode Q1, and inductance L 1 produces induction reactance and resists curent change and accumulation of energy; When pulse generating circuit 3 control triode Q2 turn-off, direct current is blocked, but under the effect of diode D3, still can there be a period of time in electric current in the inductance L 1, the electric current of this moment is exactly freewheel current, and therefore electric current has been exaggerated tens times, and energy is stored in the capacitor C 3 simultaneously, when the voltage of capacitor C 3 is elevated to certain value, make it stop to send pulse thereby will feed back to pulse generating circuit 3.
The above has done detailed description to the preferred embodiment of the utility model and embodiment by reference to the accompanying drawings, but the utility model is not limited to the above-described embodiment and examples, in the ken that those skilled in the art possess, can also make without departing from the concept of the premise utility various variations.
Claims (6)
1. power circuit that power consumption is small, comprise rectification circuit and voltage stabilizing circuit, wherein the input of rectification circuit is connected with the transmission line of electrical network, it is characterized in that: this power circuit also comprises pulse generating circuit, switching circuit and freewheeling circuit, wherein the input of switching circuit is connected with the output of described rectification circuit, the output of switching circuit is connected with the input of freewheeling circuit, the output of freewheeling circuit is connected with the input of described voltage stabilizing circuit, and the output of voltage stabilizing circuit connects the power circuit load; And the output of freewheeling circuit also is connected with the input of pulse generating circuit simultaneously, and the output of pulse generating circuit is connected with the control end of switching circuit.
2. power circuit according to claim 1 is characterized in that: adopted the CMOS integrated schmidt trigger in the described pulse generating circuit.
3. power circuit according to claim 1 and 2 is characterized in that: it is the integrated trigger U1 of CD40106 that described pulse generating circuit adopts model, also comprises resistance R 5, R6, voltage stabilizing didoe D4, diode D5 and capacitor C 5; Wherein, the pin one 4 of integrated trigger U1 connects power positive end, pin 7 ground connection, pin 9 directly links to each other with pin one 0, pin one 1 directly links to each other with pin one 2, and pin one 2 is by the positive pole of resistance R 5 connection diode D5 simultaneously, and pin one 2 connects again the negative pole of diode D5 by resistance R 6; The negative pole of diode D5 is connected with the pin one 3 of integrated trigger U1 respectively simultaneously again, is connected with the positive pole of voltage stabilizing didoe D4 and by capacitor C 5 ground connection; The negative pole of voltage stabilizing didoe D4 is connected with the output of described freewheeling circuit, and the pin 8 of integrated trigger U1 is connected with the control end of described switching circuit.
4. power circuit according to claim 3, it is characterized in that: described freewheeling circuit comprises inductance L 1, capacitor C 3, diode D1, D3, the positive pole of diode D1 is connected with the output of described switching circuit, the negative pole of diode D1 is connected with the end that the negative pole of diode D3 is connected with inductance L respectively, the plus earth of diode D3; The other end of inductance L 1 is by capacitor C 3 ground connection, and this end of inductance L 1 again respectively simultaneously with the input of described voltage stabilizing circuit be connected the negative pole of the voltage stabilizing didoe D4 in the pulse generating circuit and be connected.
5. power circuit according to claim 1 and 2, it is characterized in that: described rectification circuit is full bridge rectifier.
6. power circuit according to claim 1 and 2 is characterized in that: described voltage stabilizing circuit employing LDO low pressure difference linear voltage regulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220529862XU CN202889233U (en) | 2012-10-17 | 2012-10-17 | Low-power-consumption power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220529862XU CN202889233U (en) | 2012-10-17 | 2012-10-17 | Low-power-consumption power supply circuit |
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| Publication Number | Publication Date |
|---|---|
| CN202889233U true CN202889233U (en) | 2013-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201220529862XU Expired - Fee Related CN202889233U (en) | 2012-10-17 | 2012-10-17 | Low-power-consumption power supply circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104242696A (en) * | 2013-07-19 | 2014-12-24 | 西安电子科技大学 | Input power supply type vibration energy obtaining interface circuit |
| CN105350950A (en) * | 2014-08-20 | 2016-02-24 | 天津允林科技有限公司 | Drilling machine data acquisition and monitoring system |
-
2012
- 2012-10-17 CN CN201220529862XU patent/CN202889233U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104242696A (en) * | 2013-07-19 | 2014-12-24 | 西安电子科技大学 | Input power supply type vibration energy obtaining interface circuit |
| CN104242696B (en) * | 2013-07-19 | 2017-02-22 | 西安电子科技大学 | Input power supply type vibration energy obtaining interface circuit |
| CN105350950A (en) * | 2014-08-20 | 2016-02-24 | 天津允林科技有限公司 | Drilling machine data acquisition and monitoring system |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130417 Termination date: 20151017 |
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| EXPY | Termination of patent right or utility model |