CN203708560U - Load drive circuit of low voltage DC power supply equipment - Google Patents
Load drive circuit of low voltage DC power supply equipment Download PDFInfo
- Publication number
- CN203708560U CN203708560U CN201320879428.9U CN201320879428U CN203708560U CN 203708560 U CN203708560 U CN 203708560U CN 201320879428 U CN201320879428 U CN 201320879428U CN 203708560 U CN203708560 U CN 203708560U
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- load
- drive circuit
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- power supply
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- 230000000087 stabilizing effect Effects 0.000 claims description 9
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000003990 capacitor Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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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
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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- Control Of Electrical Variables (AREA)
Abstract
The utility model relates to a load drive circuit of low voltage DC power supply equipment; the features are that a load and drive circuit is connected in series between a positive end of a control circuit and a power supply positive end; the beneficial effects are listed in the following: 1, no DC/DC converter piece is arranged in the circuit, equipment interference is small, a linear voltage regulator can be employed to serve as a control unit 1, so power supply is stable, and system cost is low; 2, when load and drive circuit 3 needs work voltage at 18V, the control unit 1 voltage is 3.3V, system power supply is at 24V, and the work current of the load and drive circuit 3 is similar to that of the control unit 1, the percentage used for the load in equipment total power can be as high as 75%, so the circuit is highly effective; 3, no power inductor and large capacitor are arranged in the circuit, so the circuit employs paster elements, and equipment is light and tight.
Description
Technical field
The utility model relates in the electric equipment of safe voltage or low voltage power supply, particularly a kind of load driving circuits of low-voltage DC supply equipment.
Background technology
In the electric equipment network of low-voltage power supply, the power consumption of each equipment is lower, and the electric current on power supply is less, and the loss on power line is less, on network, attachable number of devices is larger, and the power consumption that therefore reduces each node is an important goal of low-voltage power network application system.Mostly adopt at present DC/DC converter technique that DC power supply is reduced to 5V or the 3V voltage that single-chip microcomputer can be used, then drive peripheral components work, but due to the conversion efficiency of DC/DC and the power consumption constraints of DC/DC self, cause the whole efficiency of whole circuit not high, take emergent identification lamp circuit as example, the high-brightness LEDs that adopt as luminescent device more at present, only has the 100mW order of magnitude for the energy of lighting LED, but the power consumption of all high-brightness LED emergency light controllers is in the market all much larger than this numerical value, actual loss substantially exceeds the power consumption of LED own, cause on the one hand energy consumption unnecessary, the energy of waste, the restriction of the power consumption that the number of devices connecting in a supply network is on the other hand subject to.
Take 24V DC power-supply system as example, analyze the control circuit of some small-power low-voltage electrical apparatuses, 24V is dropped to 3.3V by DC/DC translation circuit in most employing or 5V powers to single-chip microcomputer, and then press for load provides galvanic current by another one DC/DC translation circuit, single-chip microcomputer is by drive circuit control load.The no-load power consumption of most DC/DC is in tens mW magnitudes, more than some meetings reach 100mW; And the operating efficiency of DC/DC circuit that offers load is conventionally in 80% left and right, if load power consumption is little, as 100mW, in so whole circuit, in the proportion of load power consumption in total power consumption, often lower than 25%, obviously this is a kind of irrational design.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, a kind of low power consumption control method for low-voltage power supply electric equipment.The utility model is achieved through the following technical solutions: a kind of load driving circuits of low-voltage DC supply equipment, is characterized in that: have a load and drive circuit to be connected between the anode and power positive end of control circuit.Control circuit two ends are also connected to voltage stabilizing circuit.On load and drive circuit, be serially connected with load detecting commutation circuit, between load detecting commutation circuit and control circuit, be connected to a benefit and taste circuit, separately have a control drive circuit to connect load and drive circuit and control circuit.Between load and drive circuit and control circuit, be in series with load detecting commutation circuit, between load detecting commutation circuit and power positive end, be connected with to mend and taste circuit, at control circuit two ends and be connected to voltage stabilizing circuit, separately there is a control drive circuit to connect load and drive circuit and control circuit.
Not the utlity model has following beneficial effect: 1), there is no DC/DC transformation device in circuit, equipment disturbs little, it is that control unit 1 is powered more stable that employing can adopt linear voltage stabilization device, system cost is low, 2), the operating voltage that needs at load and drive circuit 3 is 18V, control unit 1 voltage is 3.3V, when system power supply is 24V, when the operating current of the operating current of load and drive circuit 3 and control unit 1 part is suitable, ratio for load in equipment gross power can be up to 75%, and therefore this is a kind of circuit efficiently; 3), there is no power inductance and large electric capacity in circuit, therefore circuit all adopts surface mount elements, the frivolous compactness of equipment.
Accompanying drawing explanation
Accompanying drawing 1 is circuit block diagram of the present utility model, the circuit block diagram that accompanying drawing 2,3 is other embodiment of the present utility model, and accompanying drawing 4,5,6 is physical circuit schematic diagram of the present utility model.
Embodiment
A load driving circuits for low-voltage DC supply equipment, is characterized in that: have a load and drive circuit to be connected between the anode and power positive end of control circuit.Control circuit two ends are also connected to voltage stabilizing circuit.On load and drive circuit, be serially connected with load detecting commutation circuit, between load detecting commutation circuit and control circuit, be connected to a benefit and taste circuit, separately have a control drive circuit to connect load and drive circuit and control circuit.Between load and drive circuit and control circuit, be in series with load detecting commutation circuit, between load detecting commutation circuit and power positive end, be connected with to mend and taste circuit, at control circuit two ends and be connected to voltage stabilizing circuit, separately there is a control drive circuit to connect load and drive circuit and control circuit.
By control unit 1, voltage stabilizing circuit 2, load and drive circuit 3, compensating circuit 4, controls drive circuit 5, and load detecting commutation circuit 6 forms.The feature of circuit is, load and drive circuit 3 and control unit 1 adopt tandem working mode, and when load and drive circuit 3 are worked, electric current is by compensating circuit 4 and load and drive circuit 3, then flows through control unit 1 and linear voltage-stabilizing circuit 2; In the time that load circuit 3 is closed, when load detecting commutation circuit 6 detects load no current, load detecting commutation circuit 6 is passed through compensating circuit 4 from command of execution electric current, then flows through control unit 1 and voltage stabilizing circuit 2.The topological relation of circuit can have multiple implementation as figure bis-and figure tri-; In the time that load does not need to close, system can be simplified as figure mono-, only includes voltage stabilizing circuit 2, control unit 1, load and drive circuit 3.
Figure five and figure six are two kinds and realize illustration, voltage regulation unit 2 can be realized with conventional TL431, control unit 1 can be arbitrarily with the single-chip microcomputer of recommending output pin, and when on this pin when output low level, capacitor C 3 is charged because of the clamper of D1, in the time exporting high level on this pin, C3 charges to C2 by D2, so repeatedly, and in the time exporting PWM waveform on this pin, to there is positive voltage in C2, amplitude is approximately equal to the output voltage of linear voltage-stabilizing circuit; Now Q3 conducting, and load unit is energized and work; In the time of single-chip microcomputer pin output fixed voltage, C2 discharges into 0V very soon, and Q3 by, load is closed;
In the time that load is closed, compensating circuit 4 works, and provides necessary operating current for being positioned at the single-chip microcomputer of bottom, and this part has multiple implementation method, as figure five and figure six.
In figure five, if load is closed, R3 electric current is 0, and causes Q1 cut-off, and Q2 conducting, the electric current of power supply VIN is by Q2, and R5, flow into linear voltage-stabilizing circuit, and is control unit power supply; If load is opened, when R3 voltage exceedes transistor base voltage, and cause Q1 conducting, and Q2 cut-off, the electric current of power supply VIN flow into linear voltage-stabilizing circuit by load and is, and is control unit power supply, and R5 electric current is 0;
Figure six is another real circuit, D3, and D4 provides fixed voltage for Q4 base stage, if load is closed, R7 electric current reduces, lower voltage, and cause Q4 emitter level to reduce, and Q4 conducting, the electric current of power supply VIN passes through R10, Q4, R7, flow into linear voltage-stabilizing circuit, and is control unit power supply; If load is opened, R7 voltage raises, and causes Q4 cut-off, and the electric current of power supply VIN flow into linear voltage-stabilizing circuit by load, and is control unit power supply;
In sum, the feature of circuit described in the utility model is that control unit 1 is connected with load and drive circuit 3, has provided concrete methods of realizing in this specification; Professional and technical personnel also can obtain according to the utility model principle other implementation method according to Dual Principle in circuit: for example: the positive pole and the negative pole that control unit 1 and load and drive circuit 3 are connected to successively to power supply, according to principle of the present utility model, after suitably revising, still can obtain effect of the present utility model, such modification, within will being considered as the utility model claim.
Claims (4)
1. a load driving circuits for low-voltage DC supply equipment, is characterized in that: have a load and drive circuit to be connected between the anode and power positive end of control circuit.
2. by the load driving circuits of a kind of low-voltage DC supply equipment claimed in claim 1, it is characterized in that: control circuit two ends are also connected to voltage stabilizing circuit.
3. by the load driving circuits of a kind of low-voltage DC supply equipment claimed in claim 1, it is characterized in that: on load and drive circuit, be serially connected with load detecting commutation circuit, between load detecting commutation circuit and control circuit, be connected to a benefit and taste circuit, separately have a control drive circuit to connect load and drive circuit and control circuit.
4. by the load driving circuits of a kind of low-voltage DC supply equipment claimed in claim 1, it is characterized in that: between load and drive circuit and control circuit, be in series with load detecting commutation circuit, between load detecting commutation circuit and power positive end, be connected with to mend and taste circuit, at control circuit two ends and be connected to voltage stabilizing circuit, separately there is a control drive circuit to connect load and drive circuit and control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320879428.9U CN203708560U (en) | 2013-12-30 | 2013-12-30 | Load drive circuit of low voltage DC power supply equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320879428.9U CN203708560U (en) | 2013-12-30 | 2013-12-30 | Load drive circuit of low voltage DC power supply equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203708560U true CN203708560U (en) | 2014-07-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320879428.9U Expired - Fee Related CN203708560U (en) | 2013-12-30 | 2013-12-30 | Load drive circuit of low voltage DC power supply equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203708560U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104754801A (en) * | 2013-12-30 | 2015-07-01 | 宝星电器（上海）有限公司 | Low-power-consumption control method for electrical equipment in low-voltage power supply system |
-
2013
- 2013-12-30 CN CN201320879428.9U patent/CN203708560U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104754801A (en) * | 2013-12-30 | 2015-07-01 | 宝星电器（上海）有限公司 | Low-power-consumption control method for electrical equipment in low-voltage power supply system |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20180111 Granted publication date: 20140709 |
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| PP01 | Preservation of patent right | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20181115 Granted publication date: 20140709 |
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| PD01 | Discharge of preservation of patent | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140709 |
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| CF01 | Termination of patent right due to non-payment of annual fee |