CN201039521Y

CN201039521Y - Constant voltage controller for LED lamp

Info

Publication number: CN201039521Y
Application number: CNU200720143327XU
Authority: CN
Inventors: 王伟新; 贾云鹏
Original assignee: BAOXIN SHIJI ROADLAMP FACTORY BAODING CITY
Current assignee: BAOXIN SHIJI ROADLAMP FACTORY BAODING CITY
Priority date: 2007-04-19
Filing date: 2007-04-19
Publication date: 2008-03-19
Anticipated expiration: 2017-04-19

Abstract

The utility model discloses a constant controller of an LED light fittings, comprising a battery charging control circuit, a battery discharging protection circuit, a load switch circuit and a constant voltage circuit, wherein, the battery charging control circuit consists of an over charging protection circuit, an integrated operational comparison circuit and a charging circuit; and the battery discharging protection circuit consists of a Schmitt trigger U2-2, resistances R16, R17, R20 and R21 and regulation resistances R18 and R19; and the constant voltage includes an integrated voltage regulator tube U7, a sampling amplifier U3, a field-effect transistor COM3, a diode D4, a voltage regulator diode U9, resistances R22, R23, R24, R25, R26, R34 and R35, triodes Q2 and Q3 and a regulation resistance R27; and the load switch comprises comparators U1-1, U1-2 and U1-3, resistances R1, R2, R3, R4, R5, R6, R7 and R8, a diode D1, a capacitance C3 and a field-effect transistor COM2. The utility model has the function of automatically distinguishing the day and the night, supplying the LED with constant voltage to lead the LED to have constant luminance brightness with good lighting effects and long service life of the light fittings; besides, the utility model has the advantages of high universality, low power consumption, high reliability, small volume and light weight.

Description

The constant-voltage controller of LED light fixture

One, technical field:

The utility model belongs to the controller of LED light fixture.

Two, background technology:

The controller of existing LED light fixture mainly is that the needs according to self LED light fixture design, and does not have versatility, and the circuit complexity, and power consumption is bigger, and reliability is low, and volume is big, is unsuitable for to install and transportation.And the supply power voltage poor stability of LED light fixture, the brightness of LED light fixture is non-constant.

Three, summary of the invention:

The utility model is exactly to solve now with the problems referred to above that exist in the technology, and the constant-voltage controller of a kind of versatility height, power consumption is little, reliability is high, volume is little, supply power voltage is stable LED light fixture is provided.

For addressing the above problem, technical solution of the present utility model is: a kind of constant-voltage controller of LED light fixture, and it comprises storage battery charge control circuit, battery discharging protective circuit, load switching circuit, timing circuit and constant voltage circuit; Storage battery charge control circuit comprises comparison integrated circuit U2-1, resistance R 12 around reaching, R13 and R14, capacitor C 1, the overcharge protection circuit of C2, comprise comparator U1-4, resistance R 9, R10 and R11, the integrated computing comparison circuit of zener diode U4 and U8, comprise diode D2 and D4, charging circuit with field effect transistor COM1, triode Q1, integrated voltage-stabiliser tube U6, with resistance R 15, diode D3, the positive pole of photovoltaic panel is by two diode D2 in parallel and D4, one the tunnel connects the S utmost point of field effect transistor COM1, another road is by after the resistance R 15, one the tunnel connects the G utmost point of field effect transistor COM1, another road connects the collector electrode of triode Q1, the positive pole of storage battery connects the D utmost point of field effect transistor COM1 by fuse FU one tunnel, the diode D3 of leading up to connects the input 3 of integrated voltage-stabiliser tube U6, the 2 end ground connection of the negative pole of storage battery and integrated voltage-stabiliser tube U6, its output 1 output burning voltage VDD1, battery feed VCC is connected the in-phase input end 5 of comparator U1-4 by resistance R 9 one tunnel, another road is by resistance R 11 ground connection, power vd D1 connects the inverting input 4 of comparator U1-4 by resistance R 10, ground connection behind the zener diode U4 of inverting input 4 reversal connections polyphone and the U8, the supply pin of comparator U1-4 meets power vd D1, grounding leg ground connection, connect power vd D1 behind its output 2 one road series resistor R13, behind one road series resistor R12, one the tunnel connects relatively trigger voltage end 8 pin of integrated circuit U2-1, lead up to capacitor C 1 ground connection, relatively reset terminal 10 pin of integrated circuit U2-1 connect power vd D1, trigger voltage end 8 pin are connected with threshold voltage end 12 pin, control voltage end 11 pin are by capacitor C 2 ground connection, 13 pin ground connection, output 9 pin Q are connected the base stage of triode Q1, the grounded emitter of triode Q1 after by resistance R 14; The battery discharging protective circuit comprises Schmidt trigger U2-2, resistance R 16, R17, R20 and R21, potentiometer R18 and R19, battery feed VCC connects threshold voltage end 2 pin of Schmidt trigger U2-2 by resistance R 16 one tunnel, lead up to potentiometer R18 ground connection, battery feed VCC connects trigger voltage end 6 pin of Schmidt trigger U2-2 by resistance R 17 one tunnel, lead up to potentiometer R19 ground connection, reset terminal 4 pin of Schmidt trigger U2-2 are connected power vd D1 with power end 14 pin, output 5 pin Q connect inverting input 8 pin of comparator U1-3 by resistance R 21,1 pin and 7 pin ground connection, control voltage end 3 pin CO connect the inverting input 4 of comparator U1-4, and power vd D1 connects inverting input 8 pin of comparator U1-3 by resistance R 20; Load switching circuit comprises comparator U1-1, U1-2 and U1-3, resistance R 1, R2, R3, R4, R5, R6, R7 and R8, diode D1, capacitor C 3 and field effect transistor COM2, the in-phase input end 11 of comparator U1-1 is leaded up to resistance R 1 and is connected power vd D1, another road is along connecing ground connection behind the diode D1, its inverting input 10 connects the positive pole of photovoltaic panel by resistance R 7, its output 13 is leaded up to resistance R 2 and is connected power vd D1, another road connects the in-phase input end 7 of comparator U1-2 by resistance R 6 backs, the in-phase input end 7 of comparator U1-2 is also by capacitor C 3 ground connection, the inverting input 6 of comparator U1-2 connects the inverting input 4 of comparator U1-4, its output 1 is leaded up to resistance R 3 and is connected power vd D1, another road connects the in-phase input end 9 of comparator U1-3 by resistance R 4, the in-phase input end of comparator U1-3 is also by resistance R 5 ground connection, its output 14 one tunnel connects the G utmost point of field effect transistor COM2, another road meets battery feed VCC by resistance R 8, the S utmost point ground connection of field effect transistor COM2, the D utmost point connects the negative pole of LED; Constant voltage circuit comprises integrated voltage-stabiliser tube U7, sampling amplifier U3, field effect transistor COM3, diode D4, voltage stabilizing didoe U9, resistance R 22, R23, R24, R25, R26 and R35, triode Q3; Power supply VCC is along connecing the input 3 that is connected integrated voltage-stabiliser tube U7 behind the diode D4,2 ends of integrated voltage-stabiliser tube U7 connect the negative pole of LED, output 1 output voltage V DD2, power supply VCC is by after the resistance R 22, one the tunnel connects the collector electrode of triode Q3, another road connects the G utmost point of field effect transistor, the emitter of triode Q3 connects the negative pole of LED, base stage connects the output 1 of sampling amplifier U3 by resistance R 35, the S utmost point of field effect transistor COM3 meets battery feed VCC, its D utmost point connects the positive pole of LED, power vd D2 connects the in-phase input end 3 of sampling amplifier U3 by resistance R 24 one tunnel, another road connects the negative pole of LED by voltage stabilizing didoe U9, and 4 pin of sampling amplifier U3 connect the negative pole of LED, and 8 pin meet power vd D2, inverting input 2 connects its output 1 by resistance R 23, the positive pole of LED is by after the resistance R 25, and one the tunnel connects the inverting input 2 of sampling amplifier U3, and the other end connects its negative pole by resistance R 26 backs.

Above-mentioned described the utility model also comprises timing circuit, and timing circuit comprises timing ic U5, field effect transistor COM4, resistance R 28, R29, R30, R31, R32 and R33, capacitor C 4; Constant voltage circuit also comprises resistance R 34, potentiometer R27 and triode Q2, and the inverting input 2 of sampling amplifier U3 is also by being connected the collector electrode of triode Q2, the negative pole of the emitter connection LED of triode Q2 behind resistance R 34 and the potentiometer R27; After 12 pin of timing integration block U5,13 pin and the interconnection of 14 pin, be connected on the power vd D1,1 pin connects resistance R 28 backs, 2 pin are interconnected at together after connecting capacitor C 4 backs, 3 pin connection resistance R 29,5 pin connect ground connection behind 10 pin, 6 pin are by resistance R 30 ground connection, 9 pin connect power vd D1, behind the power vd D1 series resistance R31, one the tunnel connects 6 pin, one the tunnel connects the D utmost point of field effect transistor COM4,8 pin pass through the base stage that resistance R 33 backs connect triode Q2, the S utmost point ground connection of field effect transistor COM4, and the G utmost point connects the output 1 of comparator U1-2 by resistance R 32.

When photovoltaic panel of the present utility model receives the light of certain intensity, will produce certain voltage and current, enhancing along with light, voltage and current will increase, when voltage increases to 0.4V, the 13 pin output low levels of the comparator U1-1 of load switching circuit, field effect transistor COM2 is in off state, the LED light fixture extinguishes, the electric current that photovoltaic panel produces by field effect transistor COM1, diode D2 and D4 to charge in batteries.A little less than extraneous light, arrive to a certain degree, photovoltaic panel produces voltage and current hardly, when the 10 pin voltages of comparator U1-1 are reduced to less than 0.4V, 13 pin of the comparator U1-1 of load switching circuit output high level, this high level is through the time-delay of resistance R 6 and capacitor C 3, the interference that elimination is shone in short-term as flash of light, light etc., send into 7 pin of comparator U1-2,, opening field effect transistor COM2 through comparator U1-3 through 1 pin of comparator U1-2, storage battery is powered to LED, and LED is luminous.Photovoltaic panel is to battery charging the time, and diode D2 and the D4 charging current that enlarges in parallel prevents that also batteries is to photovoltaic panel assembly back discharge simultaneously.Fet COM1 is by overcharge protection circuit and the control of integrated computing comparison circuit; integrated computing comparison circuit will detect passes through 4 pin reference voltages that battery tension VCC after resistance R 9 and the R11 dividing potential drop delivers to 5 pin of comparator U1-4 and comparator U1-4 relatively; when accumulator battery voltage is charged to 28.8V or 14.4V; the 2 pin output high level of comparator U1-4; integrated computing comparison circuit U2-1 output low level; triode Q1 is ended; triode Q1 current collection level C is a high level; turn-off fet COM1; stop battery charging, prevent the damage of batteries overvoltage.When accumulator battery voltage falls back to 28.8V or below the 14.4V, the counter-rotating of 2 pin of comparator U1-4, relatively integrated circuit U2-1 opens field effect transistor COM1, continues battery charging.Storage battery is powered to LED; when LED is luminous; its battery discharging protective circuit starts; relatively the 3 pin CO of integrated circuit U2-2 set reference voltage; resistance R 16; potentiometer R18 dividing potential drop set threshold voltage; resistance R 17; potentiometer R19 dividing potential drop is set trigger voltage; when accumulator battery voltage VCC is lower than trigger voltage 21.6 or 10.8V; the 5 pin Q end output high level of Schmidt trigger circuit U2-2; deliver to comparator U1-3; close the LED load; VCC voltage gos up to 23-25V or 11.5-12.5V, and the 5 pin Q end counter-rotating output low level of U2-2 is removed shielding, recovers operate as normal; generally be set in 21.6V-25V or 10.8-12.5V: promptly be lower than 21.6V and turn-off the LED load, when voltage goes back up to 23-25V or 11.5-12.5V by 21.6V or 10.8V, open the LED load.The timing circuit major function is regularly to close the LED load or make the output of LED micropower, timing element is made of R28, C4, timing T=2.3*32768*R28*C4 load electronic switch also starts timing circuit when opening, startup is by the D utmost point of field effect transistor COM4 6 pin to timing integration block U5, make it and of the 8 pin output of LED lamp holder control signal lock in time by timing integration block U5, LED is worked under little constant pressure, by the highlighted high-power small-power work that transfers to, save kwh loss.Constant voltage circuit is by high-power FET COM3, compositions such as sampling amplifier U3, R25, R26R34, R27 dividing potential drop are formed sampling loop, sampling voltage is delivered to 2 pin of computing sampling amplifier U3, amplify through ratio, control high-power FET COM3 makes high-power FET COM3 be operated in linear adjusting range, output is stable, and the effect of triode Q2 is to change the sampling voltage ratio.Triode Q2 is controlled by timing circuit, and timing increases voltage ratio to the back, reduces output voltage, reduces discharging current, and LED is operated under the little constant voltage.In a word, the utlity model has automatic identification day and night, supply with the LED constant voltage, make the LED luminosity constant, illumination effect is good, the advantage that the LED lamp life is long.And its versatility height, power consumption is little, reliability is high, volume is little, in light weight, easily install.

Four, description of drawings

Below in conjunction with accompanying drawing the utility model is further described:

Fig. 1 is circuit theory diagrams of the present utility model.

Five, embodiment:

As shown in Figure 1, the utility model comprises storage battery charge control circuit, battery discharging protective circuit, load switching circuit, timing circuit and constant voltage circuit.Storage battery charge control circuit comprises comparison integrated circuit U2-1, reaches resistance R 12, R13 and R14, capacitor C 1, the overcharge protection circuit of C2, the integrated computing comparison circuit that comprises comparator U1-4, resistance R 9, R10 and R11, zener diode U4 and U8, the charging circuit that comprises diode D2 and D4 and field effect transistor COM1, triode Q1, integrated voltage-stabiliser tube U6 and resistance R 15, diode D3 on every side.The battery discharging protective circuit comprises Schmidt trigger U2-2, resistance R 16, R17, R20 and R21, potentiometer R18 and R19.Constant voltage circuit comprises integrated voltage-stabiliser tube U7, sampling amplifier U3, field effect transistor COM3, diode D4, voltage stabilizing didoe U9, resistance R 22, R23, R24, R25, R26, R34 and R35, triode Q2 and Q3 and potentiometer R27.Load switching circuit comprises comparator U1-1, U1-2 and U1-3, resistance R 1, R2, R3, R4, R5, R6, R7 and R8, diode D1, capacitor C 3 and field effect transistor COM2.Timing circuit comprises timing ic U5, field effect transistor COM4, resistance R 28, R29, R30, R31, R32 and R33 and capacitor C 4.Relatively integrated circuit U2-1 and Schmidt trigger U2-2 are C7556, and integrated voltage-stabiliser tube U6 and U7 are 78L12, and integrated circuit U5 is CD4541.

Claims

1. the constant-voltage controller of a LED light fixture, it is characterized in that: it comprises storage battery charge control circuit, battery discharging protective circuit, load switching circuit, timing circuit and constant voltage circuit; Storage battery charge control circuit comprises comparison integrated circuit U2-1, resistance R 12 around reaching, R13 and R14, capacitor C 1, the overcharge protection circuit of C2, comprise comparator U1-4, resistance R 9, R10 and R11, the integrated computing comparison circuit of zener diode U4 and U8, comprise diode D2 and D4, charging circuit with field effect transistor COM1, triode Q1, integrated voltage-stabiliser tube U6, with resistance R 15, diode D3, the positive pole of photovoltaic panel is by two diode D2 in parallel and D4, one the tunnel connects the S utmost point of field effect transistor COM1, another road is by after the resistance R 15, one the tunnel connects the G utmost point of field effect transistor COM1, another road connects the collector electrode of triode Q1, the positive pole of storage battery connects the D utmost point of field effect transistor COM1 by fuse FU one tunnel, the diode D3 of leading up to connects the input 3 of integrated voltage-stabiliser tube U6, the 2 end ground connection of the negative pole of storage battery and integrated voltage-stabiliser tube U6, its output 1 output burning voltage VDD1, battery feed VCC is connected the in-phase input end 5 of comparator U1-4 by resistance R 9 one tunnel, another road is by resistance R 11 ground connection, power vd D1 connects the inverting input 4 of comparator U1-4 by resistance R 10, ground connection behind the zener diode U4 of inverting input 4 reversal connections polyphone and the U8, the supply pin of comparator U1-4 meets power vd D1, grounding leg ground connection, connect power vd D1 behind its output 2 one road series resistor R13, behind one road series resistor R12, one the tunnel connects relatively trigger voltage end 8 pin of integrated circuit U2-1, lead up to capacitor C 1 ground connection, relatively reset terminal 10 pin of integrated circuit U2-1 connect power vd D1, trigger voltage end 8 pin are connected with threshold voltage end 12 pin, control voltage end 11 pin are by capacitor C 2 ground connection, 13 pin ground connection, output 9 pin Q are connected the base stage of triode Q1, the grounded emitter of triode Q1 after by resistance R 14; The battery discharging protective circuit comprises Schmidt trigger U2-2, resistance R 16, R17, R20 and R21, potentiometer R18 and R19, battery feed VCC connects threshold voltage end 2 pin of Schmidt trigger U2-2 by resistance R 16 one tunnel, lead up to potentiometer R18 ground connection, battery feed VCC connects trigger voltage end 6 pin of Schmidt trigger U2-2 by resistance R 17 one tunnel, lead up to potentiometer R19 ground connection, reset terminal 4 pin of Schmidt trigger U2-2 are connected power vd D1 with power end 14 pin, output 5 pin Q connect inverting input 8 pin of comparator U1-3 by resistance R 21,1 pin and 7 pin ground connection, control voltage end 3 pin CO connect the inverting input 4 of comparator U1-4, and power vd D1 connects inverting input 8 pin of comparator U1-3 by resistance R 20; Load switching circuit comprises comparator U1-1, U1-2 and U1-3, resistance R 1, R2, R3, R4, R5, R6, R7 and R8, diode D1, capacitor C 3 and field effect transistor COM2, the in-phase input end 11 of comparator U1-1 is leaded up to resistance R 1 and is connected power vd D1, another road is along connecing ground connection behind the diode D1, its inverting input 10 connects the positive pole of photovoltaic panel by resistance R 7, its output 13 is leaded up to resistance R 2 and is connected power vd D1, another road connects the in-phase input end 7 of comparator U1-2 by resistance R 6 backs, the in-phase input end 7 of comparator U1-2 is also by capacitor C 3 ground connection, the inverting input 6 of comparator U1-2 connects the inverting input 4 of comparator U1-4, its output 1 is leaded up to resistance R 3 and is connected power vd D1, another road connects the in-phase input end 9 of comparator U1-3 by resistance R 4, the in-phase input end of comparator U1-3 is also by resistance R 5 ground connection, its output 14 one tunnel connects the G utmost point of field effect transistor COM2, another road meets battery feed VCC by resistance R 8, the S utmost point ground connection of field effect transistor COM2, the D utmost point connects the negative pole of LED; Constant voltage circuit comprises integrated voltage-stabiliser tube U7, sampling amplifier U3, field effect transistor COM3, diode D4, voltage stabilizing didoe U9, resistance R 22, R23, R24, R25, R26 and R35, triode Q3; Power supply VCC is along connecing the input 3 that is connected integrated voltage-stabiliser tube U7 behind the diode D4,2 ends of integrated voltage-stabiliser tube U7 connect the negative pole of LED, output 1 output voltage V DD2, power supply VCC is by after the resistance R 22, one the tunnel connects the collector electrode of triode Q3, another road connects the G utmost point of field effect transistor, the emitter of triode Q3 connects the negative pole of LED, base stage connects the output 1 of sampling amplifier U3 by resistance R 35, the S utmost point of field effect transistor COM3 meets battery feed VCC, its D utmost point connects the positive pole of LED, power vd D2 connects the in-phase input end 3 of sampling amplifier U3 by resistance R 24 one tunnel, another road connects the negative pole of LED by voltage stabilizing didoe U9, and 4 pin of sampling amplifier U3 connect the negative pole of LED, and 8 pin meet power vd D2, inverting input 2 connects its output 1 by resistance R 23, the positive pole of LED is by after the resistance R 25, and one the tunnel connects the inverting input 2 of sampling amplifier U3, and the other end connects its negative pole by resistance R 26 backs.

2. the constant-voltage controller of LED light fixture according to claim 1 is characterized in that: comprise that also timing circuit, timing circuit comprise timing ic U5, field effect transistor COM4, resistance R 28, R29, R30, R31, R32 and R33, capacitor C 4; Constant voltage circuit also comprises resistance R 34, potentiometer R27 and triode Q2, and the inverting input 2 of sampling amplifier U3 is also by being connected the collector electrode of triode Q2, the negative pole of the emitter connection LED of triode Q2 behind resistance R 34 and the potentiometer R27; After 12 pin of timing integration block U5,13 pin and the interconnection of 14 pin, be connected on the power vd D1,1 pin connects resistance R 28 backs, 2 pin are interconnected at together after connecting capacitor C 4 backs, 3 pin connection resistance R 29,5 pin connect ground connection behind 10 pin, 6 pin are by resistance R 30 ground connection, 9 pin connect power vd D1, behind the power vd D1 series resistance R31, one the tunnel connects 6 pin, one the tunnel connects the D utmost point of field effect transistor COM4,8 pin pass through the base stage that resistance R 33 backs connect triode Q2, the S utmost point ground connection of field effect transistor COM4, and the G utmost point connects the output 1 of comparator U1-2 by resistance R 32.