CN203151827U - Ultra-long-life large-current light emitting diode (LED) drive power circuit - Google Patents
Ultra-long-life large-current light emitting diode (LED) drive power circuit Download PDFInfo
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- CN203151827U CN203151827U CN 201320095341 CN201320095341U CN203151827U CN 203151827 U CN203151827 U CN 203151827U CN 201320095341 CN201320095341 CN 201320095341 CN 201320095341 U CN201320095341 U CN 201320095341U CN 203151827 U CN203151827 U CN 203151827U
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Abstract
The utility model provides an ultra-long-life large-current light emitting diode (LED) drive power circuit, which comprises a pulse constant flow source, a voltage-controlled current source, a first voltage-regulator diode, a second resistor, a sampling resistor and a voltage-controlled current source control circuit. The input end of the pulse constant flow source is connected with a rectified positive voltage Vp. The output end of the pulse constant flow source, the cathode of the first voltage-regulator diode and one end of the second resistor are all connected on a first node. The anode of the first voltage-regulator diode and the other end of the second resistor are connected on a second node. The voltage-controlled current source control circuit is connected with the first node and the second node. The voltage generated on the first node is provided for the voltage-controlled current source control circuit as an input voltage. The voltage-controlled current source control circuit outputs control voltage to a control subcircuit of the voltage-controlled current source. One end of a controlled subcircuit of the voltage-controlled current source is connected with the rectified positive voltage Vp, and the other end of the controlled subcircuit is connected with one end of the sampling resistor. The ultra-long life large current LED drive power circuit is adopted as the power drive for lighting LEDs.
Description
Technical field
The utility model relates to a kind of driving power circuit, especially a kind of big electric current LED driving power circuit.
Background technology
In the prior art at present, generally be to select the switching capacity mode of no electrolytic capacitor or adopt current regulator diode (CRD) mode at the scheme of extra long life LED mains lighting supply, but Switching Power Supply mode volume is big, complex circuit thereby cost height and electromagnetic interference are not easy to suppress; Another kind of mode adopts the constant current drive mode of CRD mode then to exist driving power little, withstand voltage low and be not suitable for shortcoming such as big electric current LED driving; The constant-current drive circuit of other high voltage supply modes then often adopts the mode of a lot of low current device parallel connections in order to solve the problem that great power LED drives, and cannot say for sure very much to demonstrate,prove the coherence request of production.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, and the big electric current LED of a kind of extra long life is provided driving power circuit, has comprised pulsation constant-current source and big Current Control and the drive part of little electric current, is fit to the occasion of big current drives LED; Do not contain electrochemical capacitor and inductance, long working life.The technical solution adopted in the utility model is:
The big electric current LED of a kind of extra long life driving power circuit comprises pulsation constant-current source, voltage-controlled current source, first voltage stabilizing didoe, second resistance, sample resistance and a voltage controlled current source control circuit;
Positive voltage Vp after the input termination rectification of pulsation constant-current source, the output of pulsation constant-current source and the negative pole of first voltage stabilizing didoe and an end of second resistance link together, and this tie point is first node; The other end of the positive pole of first voltage stabilizing didoe and second resistance is connected Section Point;
The voltage controlled current source control circuit connects first node and Section Point, and the voltage of the generation on the first node provides operating voltage for the voltage controlled current source control circuit;
Voltage controlled current source control circuit output control voltage is to the control branch road of voltage-controlled current source; Positive voltage Vp after the one end connection rectification of the controlled branch road of voltage-controlled current source, the controlled branch road other end connects an end of sample resistance; Another termination Section Point of sample resistance.
Further:
Described pulsation constant-current source comprises a N channel junction field-effect pipe, the second N-channel MOS pipe, the 3rd NPN triode, the 4th resistance, the 5th resistance, the 6th resistance, second voltage stabilizing didoe; The drain electrode of the one N channel junction field-effect pipe and positive voltage Vp after an end of the 4th resistance is connected rectification, the other end of the 4th resistance connects the drain electrode of the second N-channel MOS pipe; The grid of the one N channel junction field-effect pipe connects its source electrode; The source electrode of the one N channel junction field-effect pipe connects the grid of the second N-channel MOS pipe, the negative pole of second voltage stabilizing didoe and the collector electrode of the 3rd NPN triode; The base stage of the 3rd NPN triode connects the source electrode of the second N-channel MOS pipe and an end of the 6th resistance by the 5th resistance; It is on the first node that the emitter anodal and the 3rd NPN triode of the other end of the 6th resistance, second voltage stabilizing didoe is connected same node;
One end of the negative pole of first voltage stabilizing didoe and second resistance is connected first node; The other end of the positive pole of first voltage stabilizing didoe and second resistance is connected Section Point;
Described voltage controlled current source control circuit comprises operational amplifier, the 3rd resistance, the 7th resistance, the 4th NPN triode; Described voltage-controlled current source is the 5th N-channel MOS pipe;
One end of the 3rd resistance connects first node, the in-phase input end of the 3rd resistance other end concatenation operation amplifier, collector electrode and the base stage of the 4th NPN triode, and the emitter of the 4th NPN triode connects Section Point; The in-phase input end of the voltage reference Vref input operational amplifier that produces on the tie point of the 3rd resistance and the 4th NPN triode; The positive power source terminal of operational amplifier and negative power end connect first node and Section Point respectively; The output of operational amplifier connects the grid of the 5th N-channel MOS pipe, and the source electrode concatenation operation amplifier's inverting input of the 5th N-channel MOS pipe also connects Section Point by sample resistance, and the drain electrode of the 5th N-channel MOS pipe connects positive voltage Vp after the rectification; The 7th resistance is connected across between the grid of first node and the 5th N-channel MOS pipe.
In the foregoing circuit, the 5th N-channel MOS pipe also can be replaced with the 6th IGBT pipe;
Further:
Described pulsation constant-current source comprises a N channel junction field-effect pipe, the second N-channel MOS pipe, the 3rd NPN triode, the 4th resistance, the 5th resistance, the 6th resistance, second voltage stabilizing didoe; The drain electrode of the one N channel junction field-effect pipe and positive voltage Vp after an end of the 4th resistance is connected rectification, the other end of the 4th resistance connects the drain electrode of the second N-channel MOS pipe; The grid of the one N channel junction field-effect pipe connects its source electrode; The source electrode of the one N channel junction field-effect pipe connects the grid of the second N-channel MOS pipe, the negative pole of second voltage stabilizing didoe and the collector electrode of the 3rd NPN triode; The base stage of the 3rd NPN triode connects the source electrode of the second N-channel MOS pipe and an end of the 6th resistance by the 5th resistance; It is on the first node that the emitter anodal and the 3rd NPN triode of the other end of the 6th resistance, second voltage stabilizing didoe is connected same node;
One end of the negative pole of first voltage stabilizing didoe and second resistance is connected first node; The other end of the positive pole of first voltage stabilizing didoe and second resistance is connected Section Point;
Described voltage controlled current source control circuit comprises operational amplifier, the 3rd resistance, the 9th resistance, the tenth resistance, the 4th NPN triode; Described voltage-controlled current source is the 7th NPN triode; One end of the 3rd resistance connects first node, the in-phase input end of the 3rd resistance other end concatenation operation amplifier, collector electrode and the base stage of the 4th NPN triode, and the emitter of the 4th NPN triode connects Section Point; The in-phase input end of the voltage reference Vref input operational amplifier that produces on the tie point of the 3rd resistance and the 4th NPN triode; The positive power source terminal of operational amplifier and negative power end connect first node and Section Point respectively; The output of operational amplifier connects the base stage of the 7th NPN triode by the 9th resistance, the emitter concatenation operation amplifier's inverting input of the 7th NPN triode also connects Section Point by sample resistance, and the collector electrode of the 7th NPN triode connects positive voltage Vp after the rectification by the 8th resistance; The tenth resistance is connected across between the inverting input of the base stage of the 7th NPN triode and operational amplifier.
Further, in above-mentioned each circuit, a described N channel junction field-effect pipe Q1 can substitute by an enough resistance.
Advantage of the present utility model: utilize two constant-current circuits of pulsation constant-current source I1/ voltage-controlled current source I2 to the current work mode that LED carries out soft rising or soft decline, avoided opening or shutdown moment to the influence of LED, thereby prolonged life-span of LED; Adopt the pulsation constant-current source I1 of less electric current that control and the drive part of big electric current are powered, solved the requirement that big electric current LED drives; Can not contain elements such as the electric capacity that influences working life and inductance in the entire circuit, its working life can reach the theoretical life-span of LED.
Description of drawings
Fig. 1 is theory diagram of the present utility model.
Fig. 2 is first and second kinds of circuit implementation figure of the present utility model.
Fig. 3 is the third circuit implementation figure of the present utility model.
Fig. 4 is application block diagram of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with concrete drawings and Examples.
The big electric current LED of a kind of extra long life driving power circuit, its principle as shown in Figure 1, it is used as shown in Figure 4.
As shown in Figure 1, the big electric current LED of a kind of extra long life driving power circuit comprises pulsation constant-current source I1, voltage-controlled current source I2, the first voltage stabilizing didoe D1, second resistance R 2, sample resistance R1 and a voltage controlled current source control circuit 102;
Positive voltage Vp after the input termination rectification of pulsation constant-current source I1, the output of pulsation constant-current source I1 and the negative pole of the first voltage stabilizing didoe D1 and an end of second resistance R 2 link together, and this tie point is first node n1; The other end of the positive pole of the first voltage stabilizing didoe D1 and second resistance R 2 is connected Section Point n2;
Voltage controlled current source control circuit 102 connects first node n1 and Section Point n2, and the voltage of the generation on the first node n1 provides operating voltage for voltage controlled current source control circuit 102;
Voltage controlled current source control circuit 102 output control voltages are to the control branch road of voltage-controlled current source I2; Positive voltage Vp after the one end connection rectification of the controlled branch road of voltage-controlled current source I2, the controlled branch road other end connects the end of sample resistance R1; Another termination Section Point n2 of sample resistance R1, Section Point n2 are used for serial connection illumination LED string.
In the foregoing circuit structure, pulsation constant-current source I1 and the first voltage stabilizing didoe D1, second resistance R 2 are formed a pulsation source of stable pressure, and for next stage high-voltage power drive part is powered, it also provides the fraction supply current for the illumination LED string simultaneously.The continuous current of pulsation constant-current source I1 can be from 1uA to 1000mA, withstand voltage can be from 1V to 10000V, its pulsation source of stable pressure output voltage with the first voltage stabilizing didoe D1, second resistance R, 2 compositions can be from 0.1V to 1000V.
Voltage controlled current source control circuit 102 comprises the generation circuit of operational amplifier U1 and voltage reference Vref, and its power supply is finished by above-mentioned pulsation source of stable pressure.
Voltage-controlled current source I2 has used high power device, powerful current driving ability is provided, its electric current can be always from 1uA to 1000A, voltage-controlled current source I2 is subjected to the control of operational amplifier U1, voltage reference Vref and sample resistance R1, on order, voltage-controlled current source I2 just works after pulsation constant-current source I1 work, and after pulsation constant-current source I1 ended, voltage-controlled current source I2 just ended.For increasing mode gradually, when turn-offing, for reducing mode gradually, because gradual electric current increases or reduces, avoid electrical network high pressure or rush of current to the damage of illumination LED when voltage-controlled current source I2 opens, increased the useful life of illumination LED.
As shown in Figure 2, be a kind of concrete circuit implementation, circuit is as described below:
Described pulsation constant-current source I1 comprises a N channel junction field-effect pipe Q1, the second N-channel MOS pipe Q2, the 3rd NPN triode Q3, the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6, the second voltage stabilizing didoe D2; The drain electrode of the one N channel junction field-effect pipe Q1 and positive voltage Vp after an end of the 4th resistance R 4 is connected rectification, the other end of the 4th resistance R 4 connects the drain electrode of the second N-channel MOS pipe Q2; The grid of the one N channel junction field-effect pipe Q1 connects its source electrode; The source electrode of the one N channel junction field-effect pipe Q1 connects the grid of the second N-channel MOS pipe Q2, the negative pole of the second voltage stabilizing didoe D2 and the collector electrode of the 3rd NPN triode Q3; The base stage of the 3rd NPN triode Q3 connects the source electrode of the second N-channel MOS pipe Q2 and an end of the 6th resistance R 6 by the 5th resistance R 5; It is on the first node n1 that the emitter anodal and the 3rd NPN triode Q3 of the other end of the 6th resistance R 6, the second voltage stabilizing didoe D2 is connected same node;
One end of the negative pole of the first voltage stabilizing didoe D1 and second resistance R 2 is connected first node n1; The other end of the positive pole of the first voltage stabilizing didoe D1 and second resistance R 2 is connected Section Point n2;
Described voltage controlled current source control circuit 102 comprises operational amplifier U1, the 3rd resistance R 3, the 7th resistance R 7, the 4th NPN triode Q4; Described voltage-controlled current source I2 is the 5th N-channel MOS pipe Q5;
One end of the 3rd resistance R 3 connects first node n1, the in-phase input end of the 3rd resistance R 3 other end concatenation operation amplifier U1, collector electrode and the base stage of the 4th NPN triode Q4, and the emitter of the 4th NPN triode Q4 meets Section Point n2; The in-phase input end of the voltage reference Vref input operational amplifier U1 that produces on the tie point of the 3rd resistance R 3 and the 4th NPN triode Q4; The positive power source terminal of operational amplifier U1 and negative power end meet first node n1 and Section Point n2 respectively; The output of operational amplifier U1 connects the grid of the 5th N-channel MOS pipe Q5, the inverting input of the source electrode concatenation operation amplifier U1 of the 5th N-channel MOS pipe Q5 also passes through sample resistance R1 connection Section Point n2, positive voltage Vp after the drain electrode connection rectification of the 5th N-channel MOS pipe Q5; The 7th resistance R 7 is connected across between the grid of first node n1 and the 5th N-channel MOS pipe Q5.
In above-mentioned physical circuit implementation, the one N channel junction field-effect pipe Q1, the second N-channel MOS pipe Q2, the 3rd NPN triode Q3, the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6, the second voltage stabilizing didoe D2 forms the constant-current source of a less electric current, by the first voltage stabilizing didoe D1, second resistance R 2 converts source of stable pressure to and gives big Current Control and drive part (comprising voltage controlled current source control circuit 102 and voltage-controlled current source I2) power supply, simultaneously also provide the fraction supply current for the illumination LED string, in the moment of opening the LED power supply, there is the little electric current of this part to flow through illumination LED earlier; Big Current Control and drive part are started working subsequently, and the gate capacitance charging by 7 couples of the 5th N-channel MOS pipe Q5 of resistance R makes its conducting gradually.
Operational amplifier U1, the 3rd resistance R 3, the 7th resistance R 7, the 4th NPN triode Q4, the 5th N-channel MOS pipe Q5, sample resistance R1 have formed big Current Control and drive part, provide continuous current to illumination LED.
In first kind of circuit implementation, the 5th N-channel MOS pipe Q5 is replaced with the 6th IGBT pipe Q6, just become second kind of circuit implementation described below.Specific as follows:
Described pulsation constant-current source I1 comprises a N channel junction field-effect pipe Q1, the second N-channel MOS pipe Q2, the 3rd NPN triode Q3, the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6, the second voltage stabilizing didoe D2; The drain electrode of the one N channel junction field-effect pipe Q1 and positive voltage Vp after an end of the 4th resistance R 4 is connected rectification, the other end of the 4th resistance R 4 connects the drain electrode of the second N-channel MOS pipe Q2; The grid of the one N channel junction field-effect pipe Q1 connects its source electrode; The source electrode of the one N channel junction field-effect pipe Q1 connects the grid of the second N-channel MOS pipe Q2, the negative pole of the second voltage stabilizing didoe D2 and the collector electrode of the 3rd NPN triode Q3; The base stage of the 3rd NPN triode Q3 connects the source electrode of the second N-channel MOS pipe Q2 and an end of the 6th resistance R 6 by the 5th resistance R 5; It is on the first node n1 that the emitter anodal and the 3rd NPN triode Q3 of the other end of the 6th resistance R 6, the second voltage stabilizing didoe D2 is connected same node;
One end of the negative pole of the first voltage stabilizing didoe D1 and second resistance R 2 is connected first node n1; The other end of the positive pole of the first voltage stabilizing didoe D1 and second resistance R 2 is connected Section Point n2;
Described voltage controlled current source control circuit 102 comprises operational amplifier U1, the 3rd resistance R 3, the 7th resistance R 7, the 4th NPN triode Q4; Described voltage-controlled current source I2 is the 6th IGBT pipe Q6;
One end of the 3rd resistance R 3 connects first node n1, the in-phase input end of the 3rd resistance R 3 other end concatenation operation amplifier U1, collector electrode and the base stage of the 4th NPN triode Q4, and the emitter of the 4th NPN triode Q4 meets Section Point n2; The in-phase input end of the voltage reference Vref input operational amplifier U1 that produces on the tie point of the 3rd resistance R 3 and the 4th NPN triode Q4; The positive power source terminal of operational amplifier U1 and negative power end meet first node n1 and Section Point n2 respectively; The output of operational amplifier U1 connects the grid of the 6th IGBT pipe Q6, the inverting input that the 6th IGBT manages the emitter concatenation operation amplifier U1 of Q6 also connects Section Point n2 by sample resistance R1, positive voltage Vp after the collector electrode connection rectification of the 6th IGBT pipe Q6; The 7th resistance R 7 is connected across between the grid of first node n1 and the 6th IGBT pipe Q6.
As shown in Figure 3, be the third circuit implementation, specific as follows:
Described pulsation constant-current source I1 comprises a N channel junction field-effect pipe Q1, the second N-channel MOS pipe Q2, the 3rd NPN triode Q3, the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6, the second voltage stabilizing didoe D2; The drain electrode of the one N channel junction field-effect pipe Q1 and positive voltage Vp after an end of the 4th resistance R 4 is connected rectification, the other end of the 4th resistance R 4 connects the drain electrode of the second N-channel MOS pipe Q2; The grid of the one N channel junction field-effect pipe Q1 connects its source electrode; The source electrode of the one N channel junction field-effect pipe Q1 connects the grid of the second N-channel MOS pipe Q2, the negative pole of the second voltage stabilizing didoe D2 and the collector electrode of the 3rd NPN triode Q3; The base stage of the 3rd NPN triode Q3 connects the source electrode of the second N-channel MOS pipe Q2 and an end of the 6th resistance R 6 by the 5th resistance R 5; It is on the first node n1 that the emitter anodal and the 3rd NPN triode Q3 of the other end of the 6th resistance R 6, the second voltage stabilizing didoe D2 is connected same node;
One end of the negative pole of the first voltage stabilizing didoe D1 and second resistance R 2 is connected first node n1; The other end of the positive pole of the first voltage stabilizing didoe D1 and second resistance R 2 is connected Section Point n2;
Described voltage controlled current source control circuit 102 comprises operational amplifier U1, the 3rd resistance R 3, the 9th resistance R 9, the tenth resistance R 10, the 4th NPN triode Q4; Described voltage-controlled current source I2 is the 7th NPN triode Q7; One end of the 3rd resistance R 3 connects first node n1, the in-phase input end of the 3rd resistance R 3 other end concatenation operation amplifier U1, collector electrode and the base stage of the 4th NPN triode Q4, and the emitter of the 4th NPN triode Q4 meets Section Point n2; The in-phase input end of the voltage reference Vref input operational amplifier U1 that produces on the tie point of the 3rd resistance R 3 and the 4th NPN triode Q4; The positive power source terminal of operational amplifier U1 and negative power end meet first node n1 and Section Point n2 respectively; The output of operational amplifier U1 connects the base stage of the 7th NPN triode Q7 by the 9th resistance R 9, the inverting input of the emitter concatenation operation amplifier U1 of the 7th NPN triode Q7 also connects Section Point n2 by sample resistance R1, and the collector electrode of the 7th NPN triode Q7 connects positive voltage Vp after the rectifications by the 8th resistance R 8; The tenth resistance R 10 is connected across between the inverting input of the base stage of the 7th NPN triode Q7 and operational amplifier U1.
In the third circuit implementation, the one N channel junction field-effect pipe Q1, the second N-channel MOS pipe Q2, the 3rd NPN triode Q3, the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6, the second voltage stabilizing didoe D2 form the constant-current source of a less electric current, convert source of stable pressure to by the first voltage stabilizing didoe D1, second resistance R 2 and give big Current Control and drive part (comprising voltage controlled current source control circuit 102 and voltage-controlled current source I2) power supply, also provide the fraction supply current for the illumination LED string simultaneously.And operational amplifier U1, the 3rd resistance R 3, the 9th resistance R 9, the tenth resistance R 10, the 4th NPN triode Q4, sample resistance R1 has determined the current value that flows through among the voltage-controlled current source I2 jointly.The 7th NPN triode Q7 is the power drive device of big current drives part.
In first, second, third kind of above-mentioned circuit implementation, a described N channel junction field-effect pipe Q1 can both substitute with a resistance.
As shown in Figure 4, be the application circuit of the big electric current LED of extra long life driving power circuit.
Wherein AC is AC power, and its input can be 1 volt to 10000 volts of alternating voltage, and four diodes constitute rectification circuit, and the operating voltage of rectification circuit can be from 1 volt to 10000 volts.The illumination LED that drives is series system, and the illumination LED of series connection can be 1 to 1000.
The big electric current LED of the extra long life that the utility model provides driving power circuit, no electrolytic capacitor and inductance etc. influence the element of power source life, use substep constant current supply power mode and gradual continuous current is opened and the shutoff mode, avoided electrical network high voltage surge and pulse train etc. to disturb influence to LED and power unit life-span and luminous efficiency.
Claims (5)
1. the big electric current LED of an extra long life driving power circuit is characterized in that: comprise pulsation constant-current source (I1), voltage-controlled current source (I2), first voltage stabilizing didoe (D1), second resistance (R2), sample resistance (R1) and a voltage controlled current source control circuit (102);
Positive voltage Vp after the input termination rectification of pulsation constant-current source (I1), the output of pulsation constant-current source (I1) and the negative pole of first voltage stabilizing didoe (D1) and an end of second resistance (R2) link together, and this tie point is first node (n1); The other end of the positive pole of first voltage stabilizing didoe (D1) and second resistance (R2) is connected Section Point (n2);
Voltage controlled current source control circuit (102) connects first node (n1) and Section Point (n2), and the voltage of the generation on the first node (n1) is that voltage controlled current source control circuit (102) provides operating voltage;
Voltage controlled current source control circuit (102) output control voltage is to the control branch road of voltage-controlled current source (I2); Positive voltage Vp after the one end connection rectification of the controlled branch road of voltage-controlled current source (I2), the controlled branch road other end connects an end of sample resistance (R1); Another termination Section Point (n2) of sample resistance (R1).
2. the big electric current LED of extra long life as claimed in claim 1 driving power circuit is characterized in that:
Described pulsation constant-current source (I1) comprises a N channel junction field-effect pipe (Q1), the second N-channel MOS pipe (Q2), the 3rd NPN triode (Q3), the 4th resistance (R4), the 5th resistance (R5), the 6th resistance (R6), second voltage stabilizing didoe (D2); One end of the drain electrode of the one N channel junction field-effect pipe (Q1) and the 4th resistance (R4) is connected positive voltage Vp after the rectification, and the other end of the 4th resistance (R4) connects the drain electrode of the second N-channel MOS pipe (Q2); The grid of the one N channel junction field-effect pipe (Q1) connects its source electrode; The source electrode of the one N channel junction field-effect pipe (Q1) connects the grid of the second N-channel MOS pipe (Q2), the negative pole of second voltage stabilizing didoe (D2) and the collector electrode of the 3rd NPN triode (Q3); The base stage of the 3rd NPN triode (Q3) connects the source electrode of the second N-channel MOS pipe (Q2) and an end of the 6th resistance (R6) by the 5th resistance (R5); It is on the first node (n1) that the emitter of the positive pole of the other end of the 6th resistance (R6), second voltage stabilizing didoe (D2) and the 3rd NPN triode (Q3) is connected same node;
One end of the negative pole of first voltage stabilizing didoe (D1) and second resistance (R2) is connected first node (n1); The other end of the positive pole of first voltage stabilizing didoe (D1) and second resistance (R2) is connected Section Point (n2);
Described voltage controlled current source control circuit (102) comprises operational amplifier (U1), the 3rd resistance (R3), the 7th resistance (R7), the 4th NPN triode (Q4); Described voltage-controlled current source (I2) is the 5th N-channel MOS pipe (Q5);
One end of the 3rd resistance (R3) connects first node (n1), collector electrode and the base stage of the in-phase input end of the 3rd resistance (R3) other end concatenation operation amplifier (U1), the 4th NPN triode (Q4), the emitter of the 4th NPN triode (Q4) connects Section Point (n2); The in-phase input end of the voltage reference Vref input operational amplifier (U1) that produces on the tie point of the 3rd resistance (R3) and the 4th NPN triode (Q4); The positive power source terminal of operational amplifier (U1) and negative power end connect first node (n1) and Section Point (n2) respectively; The output of operational amplifier (U1) connects the grid of the 5th N-channel MOS pipe (Q5), the inverting input of the source electrode concatenation operation amplifier (U1) of the 5th N-channel MOS pipe (Q5) also passes through sample resistance (R1) connection Section Point (n2), positive voltage Vp after the drain electrode connection rectification of the 5th N-channel MOS pipe (Q5); The 7th resistance (R7) is connected across between the grid of first node (n1) and the 5th N-channel MOS pipe (Q5).
3. the big electric current LED of extra long life as claimed in claim 1 driving power circuit is characterized in that:
Described pulsation constant-current source (I1) comprises a N channel junction field-effect pipe (Q1), the second N-channel MOS pipe (Q2), the 3rd NPN triode (Q3), the 4th resistance (R4), the 5th resistance (R5), the 6th resistance (R6), second voltage stabilizing didoe (D2); One end of the drain electrode of the one N channel junction field-effect pipe (Q1) and the 4th resistance (R4) is connected positive voltage Vp after the rectification, and the other end of the 4th resistance (R4) connects the drain electrode of the second N-channel MOS pipe (Q2); The grid of the one N channel junction field-effect pipe (Q1) connects its source electrode; The source electrode of the one N channel junction field-effect pipe (Q1) connects the grid of the second N-channel MOS pipe (Q2), the negative pole of second voltage stabilizing didoe (D2) and the collector electrode of the 3rd NPN triode (Q3); The base stage of the 3rd NPN triode (Q3) connects the source electrode of the second N-channel MOS pipe (Q2) and an end of the 6th resistance (R6) by the 5th resistance (R5); It is on the first node (n1) that the emitter of the positive pole of the other end of the 6th resistance (R6), second voltage stabilizing didoe (D2) and the 3rd NPN triode (Q3) is connected same node;
One end of the negative pole of first voltage stabilizing didoe (D1) and second resistance (R2) is connected first node (n1); The other end of the positive pole of first voltage stabilizing didoe (D1) and second resistance (R2) is connected Section Point (n2);
Described voltage controlled current source control circuit (102) comprises operational amplifier (U1), the 3rd resistance (R3), the 7th resistance (R7), the 4th NPN triode (Q4); Described voltage-controlled current source (I2) is the 6th IGBT pipe (Q6);
One end of the 3rd resistance (R3) connects first node (n1), collector electrode and the base stage of the in-phase input end of the 3rd resistance (R3) other end concatenation operation amplifier (U1), the 4th NPN triode (Q4), the emitter of the 4th NPN triode (Q4) connects Section Point (n2); The in-phase input end of the voltage reference Vref input operational amplifier (U1) that produces on the tie point of the 3rd resistance (R3) and the 4th NPN triode (Q4); The positive power source terminal of operational amplifier (U1) and negative power end connect first node (n1) and Section Point (n2) respectively; The output of operational amplifier (U1) connects the grid of the 6th IGBT pipe (Q6), the inverting input that the 6th IGBT manages the emitter concatenation operation amplifier (U1) of (Q6) also connects Section Point (n2) by sample resistance (R1), positive voltage Vp after the collector electrode connection rectification of the 6th IGBT pipe (Q6); The 7th resistance (R7) is connected across between the grid of first node (n1) and the 6th IGBT pipe (Q6).
4. the big electric current LED of extra long life as claimed in claim 1 driving power circuit is characterized in that:
Described pulsation constant-current source (I1) comprises a N channel junction field-effect pipe (Q1), the second N-channel MOS pipe (Q2), the 3rd NPN triode (Q3), the 4th resistance (R4), the 5th resistance (R5), the 6th resistance (R6), second voltage stabilizing didoe (D2); One end of the drain electrode of the one N channel junction field-effect pipe (Q1) and the 4th resistance (R4) is connected positive voltage Vp after the rectification, and the other end of the 4th resistance (R4) connects the drain electrode of the second N-channel MOS pipe (Q2); The grid of the one N channel junction field-effect pipe (Q1) connects its source electrode; The source electrode of the one N channel junction field-effect pipe (Q1) connects the grid of the second N-channel MOS pipe (Q2), the negative pole of second voltage stabilizing didoe (D2) and the collector electrode of the 3rd NPN triode (Q3); The base stage of the 3rd NPN triode (Q3) connects the source electrode of the second N-channel MOS pipe (Q2) and an end of the 6th resistance (R6) by the 5th resistance (R5); It is on the first node (n1) that the emitter of the positive pole of the other end of the 6th resistance (R6), second voltage stabilizing didoe (D2) and the 3rd NPN triode (Q3) is connected same node;
One end of the negative pole of first voltage stabilizing didoe (D1) and second resistance (R2) is connected first node (n1); The other end of the positive pole of first voltage stabilizing didoe (D1) and second resistance (R2) is connected Section Point (n2);
Described voltage controlled current source control circuit (102) comprises operational amplifier (U1), the 3rd resistance (R3), the 9th resistance (R9), the tenth resistance (R10), the 4th NPN triode (Q4); Described voltage-controlled current source (I2) is the 7th NPN triode (Q7); One end of the 3rd resistance (R3) connects first node (n1), collector electrode and the base stage of the in-phase input end of the 3rd resistance (R3) other end concatenation operation amplifier (U1), the 4th NPN triode (Q4), the emitter of the 4th NPN triode (Q4) connects Section Point (n2); The in-phase input end of the voltage reference Vref input operational amplifier (U1) that produces on the tie point of the 3rd resistance (R3) and the 4th NPN triode (Q4); The positive power source terminal of operational amplifier (U1) and negative power end connect first node (n1) and Section Point (n2) respectively; The output of operational amplifier (U1) connects the base stage of the 7th NPN triode (Q7) by the 9th resistance (R9), the inverting input of the emitter concatenation operation amplifier (U1) of the 7th NPN triode (Q7) also connects Section Point (n2) by sample resistance (R1), and the collector electrode of the 7th NPN triode (Q7) connects positive voltage Vp after the rectification by the 8th resistance (R8); The tenth resistance (R10) is connected across between the inverting input of the base stage of the 7th NPN triode (Q7) and operational amplifier (U1).
5. as claim 2, the big electric current LED of 3 or 4 described extra long lifes driving power circuit, it is characterized in that: a described N channel junction field-effect pipe (Q1) can substitute by an enough resistance.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320095341 CN203151827U (en) | 2013-03-01 | 2013-03-01 | Ultra-long-life large-current light emitting diode (LED) drive power circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320095341 CN203151827U (en) | 2013-03-01 | 2013-03-01 | Ultra-long-life large-current light emitting diode (LED) drive power circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103108473A (en) * | 2013-03-01 | 2013-05-15 | 王开 | Ultra-long life large current light emitting diode (LED) drive power circuit |
| CN104754800A (en) * | 2013-12-27 | 2015-07-01 | 欧普照明股份有限公司 | Device for controlling input surge current of LED module |
-
2013
- 2013-03-01 CN CN 201320095341 patent/CN203151827U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103108473A (en) * | 2013-03-01 | 2013-05-15 | 王开 | Ultra-long life large current light emitting diode (LED) drive power circuit |
| CN104754800A (en) * | 2013-12-27 | 2015-07-01 | 欧普照明股份有限公司 | Device for controlling input surge current of LED module |
| CN104754800B (en) * | 2013-12-27 | 2017-05-31 | 欧普照明股份有限公司 | A kind of control device of LED modules inrush current |
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