CN203590569U - LED lamp power supplying circuit - Google Patents
LED lamp power supplying circuit Download PDFInfo
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- CN203590569U CN203590569U CN201320802254.6U CN201320802254U CN203590569U CN 203590569 U CN203590569 U CN 203590569U CN 201320802254 U CN201320802254 U CN 201320802254U CN 203590569 U CN203590569 U CN 203590569U
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- module
- energy storage
- led lamp
- inductive energy
- current
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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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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
An LED lamp power supplying circuit includes a mobile power supply, an inductive energy storage module, a current detection module, a switch control module, a switch module which controls the switching on and switching off of the inductive energy storage module according to current values detected by the current detection module, and a clock module which is used for controlling the switched-off duration of the switch module. The clock module controls the switched-off duration of the switch module through the switch control module such that the value of peak current of the inductive energy storage module can be constant; under the cooperative control of the current detection module, the switch control module, the switch module and the clock module, the peak current of the inductive energy storage module at any charge and discharge periods can be equal to a preset value set by the current detection module, such that the output power of the LED lamp power supplying circuit can be constant; when a load is constant, output current is constant, and therefore, constant current output can be realized.
Description
Technical field
The utility model relates to a kind of power-supply device, particularly a kind of LED lamp power circuit for LED light fixture.
Background technology
The light source of new generation attracting most attention as the current whole world, LED is because of the advantages such as its high brightness, low in calories, long-life, nontoxic, recyclable recycling, the most promising green illumination light source of 21 century of being known as.LED industry also grows up at home rapidly, and product is widely used in Landscape Lighting and general lighting field.But with battery powered drawer lamp, on flashlight and some decorative lamps, be but subject to some restrictions, as battery electric quantity.Although there are on the market these products, when all performance could not be taken into account, take into account cost simultaneously.For having following features to the battery of LED light fixture power supply: change in voltage scope large (electric weight different situations); Output current limited ability; And the electric weight of storing is limited etc.
Feature for battery is same, and existing circuit has two large types, from market orientation, can be divided into high-end type and low side type.The circuit of low side type is very simple, is exactly directly on loop, to be connected in series current-limiting resistance.The advantage of this scheme is very cost-saving, is almost zero cost on drive circuit.But shortcoming is also very obvious, and circuit efficiency is low, and electric energy utilization rate is low, brightness is rationed the power supply cell voltage variation very greatly, and is non-constant current driving etc.The circuit more complicated of high-end type, export to DC/DC, then output constant current is to LED lamp but circuit frame is substantially all battery.This scheme has fully taken into account the characteristic of LED, i.e. constant current drives.Although also adopted DC/DC driving, also low side type is high for effect.It is high a lot of that but shortcoming is cost, in addition owing to being constant current output, constant power output namely, so circuit need to meet permanent power from the larger electric current of battery output when cell voltage declines, this also will cause reduce greatly the actual life of battery.
Utility model content
In view of this, be necessary to provide a kind of not only can cost-saving but also can extend the LED lamp power circuit of service time of battery, to meet the demand.
A kind of LED lamp power circuit comprises a portable power source, an inductive energy storage module being electrically connected with this portable power source, one for detection of the current detection module that flows through the size of current of described inductive energy storage module, a switch control module being electrically connected with described current detection module, one according to the size of the detected current value of described current detection module and control the switch module of described inductive energy storage module break-make by described switch control module, one for controlling described switch control module to control the clock module of the shutoff duration of described switch module.Described clock module is controlled the shutoff duration of described switch module so that the peak current of described inductive energy storage module discharges and recharges the cycle all in same value at each by described switch control module.
Compared with prior art, described inductive energy storage module is at current detection module, switch control module, switch module, and under the cooperation of clock module control, make inductive energy storage module in any one discharges and recharges the cycle, the peak current of inductive energy storage module all equals the preset value that described current detection module sets.When portable power source electric weight abundance when just using, its output electric weight is large, it is short that the current value of described inductive energy storage module reaches time of preset value, and work as portable power source in use for some time, when electric weight is no longer sufficient, output electric weight diminishes, the current value that clock module is controlled described inductive energy storage module reaches time of preset value can be elongated, and then make no matter how long described portable power source uses, as long as there is electric weight, no matter electric weight number, the power output of this LED lamp power circuit is all constant, and when load one timing, constant output current, thereby realize constant current output, and then the useful life of growth battery.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, embodiment of the present utility model is described, wherein:
The block diagram of a kind of LED lamp power circuit that Fig. 1 provides for the utility model.
Fig. 2 is the circuit diagram of the LED lamp power circuit of Fig. 1.
Embodiment
Based on accompanying drawing, specific embodiment of the utility model is further elaborated below.Should be appreciated that specific embodiment described herein is only as embodiment, and be not used in restriction protection range of the present utility model.
Refer to Fig. 1, it is the circuit block diagram of a kind of LED lamp power circuit 100 provided by the utility model.Described LED lamp power circuit 100 comprises a portable power source 11, an inductive energy storage module 12 being electrically connected with this portable power source 11, one for detection of the current detection module 13 that flows through the current value size of described inductive energy storage module 12, a switch control module 14 being electrically connected with described current detection module 13, one according to the size of described current detection module 13 detected current values and by the switch module 15 of described inductive energy storage module 12 break-makes of described switch control module 14 control, a clock module 16 of controlling the shutoff duration of described switch module 15 for controlling described switch control module 14, an and rectification filtering module 17 that is electrically connected at the output of described inductive energy storage module 12.
Described portable power source 11 can be dry cell, and storage battery, rechargeable battery etc. can be with the mobile accumulation power supplies of light fixture.These accumulation power supplies have the electric current that a feature is exactly output, and voltage changes along with the variation of electric weight, and for the LED lamp that needs constant current, it is carried out to necessary conversion is indispensable.In the present embodiment, described portable power source 11 is dry cell.
Described inductive energy storage module 12 comprises an inductance L 1.This inductance L 1 can, for being made by conducting material coiling magnetic core, typically as copper cash, also can be removed magnetic core or replace with ferrimagnet.Inductance has a variety of, mostly with outer enamel coil encircling ferrite bobbin, make, and some protection inductance is placed in coil in ferrite completely.The core of some inductance elements can regulate.Can change inductance size thus.This inductive energy storage module 12 utilizes the magnetic energy of described inductance L 1 to transform electric energy, the operation principle of electric energy conversion magnetic energy is switched it between charge and discharge, also just the time length of the charge and discharge of this inductance L 1 is controlled and is become emphasis of the present utility model.The weber equilibrium response own according to inductance L 1, in inductance L 1 discharged and recharged in the cycle, and the long-pending of the voltage at its two ends and charging interval is certain, and equals the peak current value of this inductance L 1 and the product of Henry.Therefore, when peak current is fixedly time, and when inductance L 1 is determined, Henry is also determined, but when the reduction of portable power source 11 along with electric weight, the voltage that is carried in inductance L 1 two ends is reducing, thereby the charging duration of inductance L 1 will be increased.
Described current detection module 13 is for detection of the size that flows through the current value of described inductive energy storage module 12.In the present embodiment, described current detection module 13 comprises two sampling resistor R2, R3 in parallel.Described sampling resistor R2, R3 are for the size of the peak current of default described current detection module 13 and the trigger current of described switch module 15.This trigger current is for determining the break-make of described switch module 15.Described current detection module 13, switch control module 14, switch module 15 and clock module 16 can be come together to carry out by an integrated control chip.This control chip can be central processing unit, microprocessor or single-chip microcomputer.In the present embodiment, described control chip is microprocessor, and model is MC34063, and it is those skilled in the art's functional chips known, does not repeat them here.This microprocessor is a kind of integrated chip, to reduce costs, what certainly can expect is, also can utilize other electronic devices and components, as triode, diode, switch etc. come design circuit with the function of complete above-mentioned current detection module 13, switch control module 14, switch module 15 and clock module 16.
The function of described switch control module 14 is completed by aforesaid microprocessor, for control the break-make of described switch module 15 according to the detected size that flows through the current value of described inductive energy storage module 12 of current detection module 13.Be understandable that, when flowing through the current value of described inductive energy storage module 12 and be greater than 13 predefined trigger currents of current detection module, 14 of described switch control modules are controlled described switch module 15 and are turn-offed described inductive energy storage module 12, make this inductive energy storage module 12 stop charging, start electric discharge, thereby make the peak current of inductive energy storage module 12 in each discharges and recharges the cycle all be fixed on a certain value.And the current value that flows through described inductive energy storage module 12 is while being less than described trigger current, simultaneously under the constraint of described clock module 16,14 of described switch control modules are controlled described switch module 15 and are opened described inductive energy storage module 12, so that this inductive energy storage module 12 stops electric discharge, start charging.
The function of described switch module 15 is completed by aforesaid microprocessor, for according to inductive energy storage module 12 described in the instruction break-make of switch control module 14, to control discharging and recharging of described inductive energy storage module 12.The existing capability that this switch module 15 is described microprocessor, seldom explains.
Described clock module 16 with such as switch control module 14, switch module 15 is the same by aforesaid microprocessor, is completed.Certainly under the control of this clock module 16, in any one of described inductive energy storage module 13, discharge and recharge in the cycle, the shutoff duration that this clock module 16 is controlled described switch module 15 by described switch control module 14 is consistent.Owing to being the reduction of the electric weight of battery along with portable power source 11, the electric weight discharging in unit interval also reduces, and in order to guarantee to be carried in the power invariability at load two ends, simultaneously in order to make the peak current of inductive energy storage module 12 constant, need to lengthen the charging interval of inductive energy storage module 12, lengthen the unlatching duration of described switch module 15.And well-known, due to the characteristic of inductance itself, weber equilibrium response, along with the reduction of the electric weight of portable power source 11, the charging interval must increase.Therefore, described clock module 16 guarantees consistent by the shutoff duration that is mainly used in controlling by described switch control module 13 described switch module 15, guarantee that any one in inductive energy storage module 12 discharged and recharged in the cycle, electric discharge duration is consistent in each cycle.Therefore, be understandable that, when portable power source 11 is the reduction of the electric weight of battery, the cycle that discharges and recharges of described inductive energy storage module 12 can increase.In order to guarantee described inductive energy storage module 12, can discharge fully, the shutoff duration of described switch module 15 can be greater than the discharge time of this inductive energy storage module 12, so that inductive energy storage module 12 is in any one discharges and recharges the cycle, this inductive energy storage module 12 can fully be discharged, avoid because electric discharge is each time abundant not, and the minimizing of the charge volume next time causing.Owing to utilizing described clock module 16 to guarantee the shutoff duration of switch module 15, just can determine the opening time of described switch module 15, thereby again charge to described inductive energy storage module 12.
Described rectification filtering module 17 comprises a diode D2 and a capacitor C 4 of connecting with this diode D2.Certainly can understand, this LED lamp power circuit 100 to have load be the two ends that at least one LED lamp should be connected in parallel on described capacitor C 4.Described rectification filtering module 17 is for being adjusted into constant current to power to load LED lamp by the electric current of inductive energy storage module 12 outputs.The negative electrode of described LED lamp is ground connection directly.
Compared with prior art, described inductive energy storage module 12 is at current detection module 13, switch control module 14, switch module 15, and under the cooperation of clock module 16 control, make inductive energy storage module 12 in any one discharges and recharges the cycle, the peak current of inductive energy storage module 12 all equals the preset value that described current detection module 13 sets, only have when the peak current of inductive energy storage module 12 reaches the preset value setting in any one discharges and recharges the cycle, switch module 15 just can turn-off, stop charging, otherwise charge to described inductive energy storage module 12 always, until the electric current of this inductive energy storage module 12 reaches peak current, thereby also guarantee that described inductive energy storage module 12 can reach peak current in each discharges and recharges the cycle.When portable power source 11 electric weight abundance when just using, its output electric weight is large, it is short that the current value that clock module 16 is controlled described inductive energy storage module 12 reaches the time of preset value, and work as portable power source 11 in use for some time, when electric weight is no longer sufficient, output electric weight diminishes, the current value that clock module 16 is controlled described inductive energy storage module 12 reaches time of preset value can be elongated, and then make no matter how long described portable power source 11 uses, as long as there is electric weight, no matter electric weight number, the power output of this LED lamp power circuit 100 is all constant, and when load one timing, constant output current, thereby realize constant current output.And when the electric weight of battery is no longer sufficient, output lower voltage time, the opening time of switch module 15 can increase as mentioned above, thereby cause the electric current that flows through described inductive energy storage module 12 will automatically adjust reduction, thereby can increase the service time of battery, since well-known, the battery life-span that electric discharge can significantly reduce battery in the situation that exceeding normal electric current.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all interior done any modifications in spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection range of the present utility model.
Claims (10)
1. a LED lamp power circuit, it is characterized in that: these power supply circuits comprise a portable power source, an inductive energy storage module being electrically connected with this portable power source, one for detection of the current detection module that flows through the size of current of described inductive energy storage module, a switch control module being electrically connected with described current detection module, one according to the size of the detected current value of described current detection module and control the switch module of described inductive energy storage module break-make by described switch control module, one for controlling described switch control module to control the clock module of the shutoff duration of described switch module, described clock module is controlled the shutoff duration of described switch module so that the peak current of described inductive energy storage module discharges and recharges the cycle all in same value at each by described switch control module.
2. LED lamp power circuit as claimed in claim 1, is characterized in that: described portable power source is battery.
3. LED lamp power circuit as claimed in claim 1, it is characterized in that: when described current detection module detects the preset value that the electric current that flows through described inductive energy storage module is greater than described switch control module, described switch control module is controlled the output that described switch module turn-offs described inductive energy storage module.
4. LED lamp power circuit as claimed in claim 1, is characterized in that: described clock module is controlled described switch module shutoff duration by switch control module is consistent in each cycle of described inductive energy storage module.
5. LED lamp power circuit as claimed in claim 4, is characterized in that: the shutoff duration of described switch module is greater than the maximum electric discharge duration of described inductive energy storage module.
6. LED lamp power circuit as claimed in claim 1, is characterized in that: described current detection module, switch control module, and switch module is carried out by a control chip.
7. LED lamp power circuit as claimed in claim 5, is characterized in that: described control chip can be central processing unit, microprocessor or single-chip microcomputer.
8. LED lamp power circuit as claimed in claim 1, it is characterized in that: described LED lamp power circuit also comprises a rectification filtering module, this rectification filtering module is electrically connected at the output of described inductive energy storage module, and for the output transform of described inductive energy storage module is become to constant current.
9. LED lamp power circuit as claimed in claim 1, it is characterized in that: described current detection module comprises two sampling resistor R2, R3 in parallel, described sampling resistor R2, R3 are for arranging the trigger current size of described current detection module, and described trigger current determines cut-offfing of described switch module.
10. LED lamp power circuit as claimed in claim 1, is characterized in that: described LED lamp power circuit is used at least one LED lamp power supply, the direct ground connection of negative electrode of this LED lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320802254.6U CN203590569U (en) | 2013-12-04 | 2013-12-04 | LED lamp power supplying circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320802254.6U CN203590569U (en) | 2013-12-04 | 2013-12-04 | LED lamp power supplying circuit |
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| Publication Number | Publication Date |
|---|---|
| CN203590569U true CN203590569U (en) | 2014-05-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320802254.6U Withdrawn - After Issue CN203590569U (en) | 2013-12-04 | 2013-12-04 | LED lamp power supplying circuit |
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| Country | Link |
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| CN (1) | CN203590569U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104703330A (en) * | 2013-12-04 | 2015-06-10 | 林万炯 | LED lamp power supply circuit |
-
2013
- 2013-12-04 CN CN201320802254.6U patent/CN203590569U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104703330A (en) * | 2013-12-04 | 2015-06-10 | 林万炯 | LED lamp power supply circuit |
| CN104703330B (en) * | 2013-12-04 | 2017-11-17 | 赛尔富电子有限公司 | A kind of LED power supply circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140507 Effective date of abandoning: 20171117 |