CN101192067A - Two high-voltage constant flow source circuit - Google Patents
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Abstract
A DC stabilized current power supply is customarily refereed as a constant current source. The invention relates to two high voltage constant current source circuits, namely a single wave type constant current source and a double wave type constant current source, which belongs to the stabilized power supply technical field. The constant current sources provided by the invention are mainly used for driving LEDs (light-emitting diode), and are also used for other products which need constant current power supplies and constant current accuracy of which is unnecessary to be very high. The high voltage constant current source refers to a power supply which directly uses a 220V commercial power and outputs a constant current incapable of varying with load within a certain range. The constant current values of the constant current sources provided by the invention can be set by a user. Both the single wave type constant current source circuit and the double wave constant current source circuit are four-terminal networks, wherein, each constant current source circuit comprises three-part circuits, namely a detection and execution circuit, a drive and electronic switch circuit, and an isolation and filtering output circuit, and the double wave constant current source circuit also comprises a re-drive circuit. Concerning the technique, the invention adopts a structure that some parts are integrated and the other parts are externally connected, thereby bringing about a small overall size after assembly. The invention can be embedded into an LED lamp and directly powered by the 220V AC commercial power, and the user can use the LED lamp as conveniently as using an incandescent lamp.
Description
Technical field
The present invention is two kinds of high-voltage constant current source circuits, and a kind of is " single wave mode " constant current source, and another kind is " double wave type " constant current source, belongs to the stabilized current supply technical field.
Electronic product needs the D.C. regulated power supply power supply mostly, needs dc current stabilized power supply to power but also have, and this dc current stabilized power supply custom is called " constant current source ".The LED that for example emerges in recent years (light emitting diode) light fixture has more superiority with constant current source power supply, and is more energy-conservation.Circuit of the present invention is actually a four-pole network, though its integrated back pin is more than 4.Because of the circuit of the present invention big slightly element of a few volume, current technology can't be integrated, has to them as outward element, and this additional pin is used to connect outward element.This tetrapolar input end (being the ac power input end of external rectifier bridge) connects civil power 220V or 110V power supply, output terminal directly connects the LED string, the electric current that flows through the LED string then is a comparatively stable DC, and irrelevant with the number of LED polyphone, the number of LED polyphone has the upper limit certainly.Adopt the integrated output current of " DIP8 " packing forms can reach 80mA; Adopt the integrated output current of " TO220-7 " packing forms can reach 400mA, constant current numerical value can be set by the user.Constant current source with circuit of the present invention makes can embed the LED lamp interior, and directly with the electric main power supply, the user uses the LED light fixture as using incandescent lamp bulb convenient.Constant current source of the present invention is mainly used in LED and drives, and need also to can be applicable to constant current power supply and constant current accuracy to need not on the very high other products.
Background technology
Check parts or product that existing constant current source technology makes, though be no lack of the integrated circuit packing forms, mostly its input end is to connect low-voltage dc power supply, and input voltage range is narrow, is generally 5V～30V, output current tens is to hundreds of milliamperes, such constant current source product is a lot of, and because of it adopts linear adjustment technology, efficient is not high, thermal value is very big, and nature can't be imported high voltage.Wherein have on the minority product input voltage to be limited to 90V, the incoming transport power supply need add the rectifying and wave-filtering link.(supertex inc, network address: products C L1 www.supertex.com)～CL7 is an example to this class constant current source product, is limited to 90V on its input voltage, if will connect the 220V power supply, also will connect and insert the resistance step-down of a number watt power with U.S. Supertex Inc..Not only waste electric energy, increase volume,,, brought potential safety hazard because the dropping resistor thermal value is very big even if can embed the LED lamp interior.Also have portioned product to adopt the switch adjustment technology, input end can be received on 8V～450V direct supply, wide input voltage range, efficient has also improved, but required outward element is more relatively, and the constant current source volume that assembles is bigger than normal, embeds LED light fixture difficulty.The product that the XLT604 that Xiamen Linkage Microtronic A/S produces comes to this.XLT604 comes down to a voltage-dropping type DC/DC Switching Power Supply and adjusts chip, makes the constant current source product and also must add outward elements such as switch mosfet pipe, inductance, and volume increases a lot of, and the LED lamp interior that embeds small size has not had possibility.The example of similar chip also has the HV9910 of Supertex Inc. etc.
High-voltage constant current source of the present invention, wide input voltage range can be connected on alternating current 220V or the 110V power supply, input end only needs rectification, do not need filtering, saved hv filtering electrochemical capacitor occupation space, and the electrochemical capacitor volume that this hv filtering is used is often bigger.The required outward element in integrated back seldom.For " single wave mode " constant current source, only need a rectifier bridge (or four diodes), the resistance of a setting Constant Electric Current flow valuve and the electrochemical capacitor of an output terminal filtering to get final product; For " double wave type " constant current source, also need increase a pact (1～10) μ f/400V electrochemical capacitor again.Since adopt the switch adjustment technology, the efficient height, and thermal value is low, though also need outward element, assembles total volume and little, is embedded into LED lamp interior little as the MR16 Lamp cup without a doubt.
Summary of the invention
The present invention has designed two kinds of constant-current source circuits, a kind of title " single wave mode " constant current source, another kind of " double wave type " constant current source that claims.
" single wave mode " constant current source, circuit is simple, volume is little, though output ripple is slightly bigger, it very is proper being used for the little LED light fixture of drive point light current; " double wave type " is though the constant-current source circuit complexity a bit, but current technology can be integrated, outward element " single wave mode " only increases a pact (1～10) μ f/400V electrochemical capacitor, and output ripple is littler, efficient is higher, Electro Magnetic Compatibility is better, and it is big that output current is also wanted.No particular components in two kinds of constant current sources, cost is all very cheap.
Set forth the principle of the invention below in conjunction with accompanying drawing.
Except VC1, C3 and these three elements of R5, remainder integrates.That part that expression integrates in accompanying drawing 1 frame of broken lines has A, B, three frames of C in the frame of broken lines.This block diagram is a technical conceive of the present invention.The implication of each frame representative once is described.A frame: detect and carry out; Whether the Constant Electric Current flow valuve that is detected output by it exceeds, and does not have to carry out when exceeding and connects electronic switch, disconnects electronic switch if any exceeding then to carry out, and cuts off output current; Outer meeting resistance R5 belongs to the A frame, makes output current and detects sampling.B frame: drive and electronic switch; Electronic switch is switched on or switched off and is controlled by the A frame.Form Darlington transistor with two NPN triodes among the present invention and make electronic switch, drive the part dividing potential drop that Darlington transistor is then got some resistance in seriess, simple and practical.C frame: isolation, filtering output; The so-called isolation is to make the little ripple DC voltage of output terminal must not influence input end, and the external electrolytic capacitor filter C3 of output terminal also belongs to the C frame.
Accompanying drawing 4 is embodiment of " single wave mode " constant-current source circuit, below in conjunction with accompanying drawing 2 and accompanying drawing 3 this embodiment is described.
Accompanying drawing 2 expression alternating currents are through the voltage waveform after the full-wave rectification, and this is a half-sinusoid dc pulse moving voltage, can abbreviate pulsating volage as.If its analytic equation is: u=|Um sin (ω t/2) |, be simple meter, establish the first phase parallactic angle and equal zero.
U is the alternating voltage instantaneous value in the formula, and Um is an alternating voltage peak, and ω is a pulsation, and t is the time.Value during (ω t/2)=n π is zero to u at the phasing degree, and wherein n is a positive integer, i.e. n=0,1,2,3.... etc.U is a periodic quantity, and it is just passable that analysis circuit is only analyzed first cycle.
When input pulsating volage u dropped to zero, the thyristor VT1 in the accompanying drawing 4 turn-offed, and triode V1, V2 form Darlington transistor and also be in off state as electronic switch, the output no current.Referring to accompanying drawing 3, when pulsating volage rose to u ' value, the dividing potential drop on resistance R 6 can drive the electronic switch conducting that triode V1, V2 form, and output current has also just been arranged.This output current flows through load through isolating diode VD1, simultaneously to electrochemical capacitor C3 charging energy storage, smoothing current waveform.Resistance R 5 is made output current and is detected sampling, and the electric current that flows through R5 produces the negative voltage in a positive left side, a right side.Along with pulsating volage rises, the electric current that flows through R5 increases the corresponding increase of the voltage drop on the R5.When pulsating volage rises to u " in the time of value; (u around here "＞u ', " if voltage drop that the electric current of R5 produces is flow through at the corresponding phasing degree (ω t/2)=θ) of value is enough to make thyristor VT1 triggering and conducting to u; the drive current of triode V1 is fallen in short circuit; electronic switch promptly is in off state, till following one-period, pulsating volage rose to u ' value.The moment of (ω t/2)=π at the phasing degree, pulsating volage u=0, thyristor VT1 turn-offs constantly again at this, enters next circulation.The electronic switch blocking interval discharges energy storage by electrochemical capacitor C3 and powers to the load.
Suitably choose the value of electrochemical capacitor C3, but the proof load electric current is continuous and ripple is less.Suitably choose the value of resistance R 5, just can set the Constant Electric Current flow valuve.
The A frame of the A frame of broken lines respective figure 1 in the accompanying drawing 4, i.e. detection, executive circuit.Concrete connected mode is such: the negative electrode of thyristor VT1 (5) connects the negative output terminal (12) of rectifier bridge VC1; The end of sample resistance R5 links to each other with the negative pole of electrochemical capacitor C2, connects the negative electrode (5) of VT1 again; The end of the other end of R5 (8) connecting resistance R4, the positive pole (7) of another termination C2 of R4, an end of resistance R 3 links to each other the gate pole (4) of another termination VT1 of R3 with (7) point; The anode of VT1 (3) links to each other with an end of resistance R 1, and the other end of R1 (1) connects the positive output end (11) of rectifier bridge VC1.
The B frame of the B frame of broken lines respective figure 1 in the accompanying drawing 4 promptly drives and electronic switching circuit, and concrete connected mode is such: the emitter of NPN triode V1 connects the base stage of NPN triode V2; The collector of V1 and the collector of V2 are connected in (10) point, and this point promptly is the negative terminal OUT2 of constant current source output; After capacitor C 1 and resistance R 2 parallel connections, an end links to each other with the anode (3) of thyristor VT1, and the other end (6) connects the base stage of triode V1; The emitter of V2 connects the end (8) of sample resistance R5; Resistance R 6 is connected between (6) point and (8) point.Here R1 had both made the current-limiting resistance of thyristor VT1, and the base stage of connecting with resistance R 2, R6 again to triode V1 provides drive current; C1 works to quicken triode V1 conducting; For preventing that thyristor VT1 from misleading, C2 is anti-interference for the adding electrochemical capacitor.
The C frame of the C frame of broken lines respective figure 1 in the accompanying drawing 4, i.e. isolation, filtering output.The C frame is the simplest, has only an isolating diode VD1 and an electrolytic capacitor filter C3.Concrete connected mode is such: the positive pole of isolating diode VD1 connects the anode output (11) of rectifier bridge VC1, and the positive pole of electrolytic capacitor filter C3 connects the negative pole of VD1 (9), and (9) point promptly is the anode OUT1 of constant current source output; The negative pole of C3 connects the tie point (10) of the collector of the collector of V1 and V2, and (10) point promptly is the negative terminal OUT2 of constant current source output.Adding isolating diode VD1 can keep rectifier bridge VC1 anode output (11) to be the half-sinusoid dc pulse moving voltage.
Can find out from accompanying drawing 3, the energy of the actual utilization of " single wave mode " constant-current source circuit load only is the energy that the dash area of pulsating volage provides, shade is in phasing degree 0～θ part, promptly is in the half period of (ω t/2)＜(pi/2), and this shade only accounts for the fraction of pulsating volage.Make the electrical network energy utilization ratio not high, ripple can not be very little, is difficult to the big electric current of output, is the weak point of " single wave mode " constant-current source circuit.
The latter half of pulsating volage (ω t/2)＞(pi/2) at the phasing degree is also used, as accompanying drawing 6 is represented, occur two roughly dash areas of symmetry in the pulsating volage cycle, Here it is so-called " double wave type " constant current source; The constant current source that reaches so noted earlier has been exactly " single wave mode " constant current source naturally.
1. the u value is crossed behind the peak value Um and the u value drops to and equals u once more " constantly during this period of time in, thyristor VT1 is essential to be turn-offed.
2. after the u value is crossed peak value Um, when the u value is equal to or less than u once more " time, electronic switch should be connected output current once more, till u＜u '.
3. entering following one-period should be able to circulate.
Electrochemical capacitor C4 is an outward element that belongs to this frame, rises and detects memory effect.Other adds between (2) point that an isolating diode VD2 seals in the anode (3) of thyristor VT1 and resistance R 1.All the other A, B, three frames of C are identical with " single wave mode " circuit block diagram
After the voltage drop of the electric current generation of flowing through on the current sampling resistor R5 was enough to make thyristor VT1 triggering and conducting, the drive current of the sub-switch of short circuit power down turn-offed electronic switch on the one hand, cuts off output current; Also make PNP triode V4 obtain the bias current conducting by resistance R 8, R9 on the other hand, the direct coupling of PNP triode V3 and V4 also is able to conducting, and electrochemical capacitor C4 is recharged, and charging amplitude maximum can reach Um; Pulsating volage u value crosses that to drop to certain value behind the peak value Um be u≤u " time; PNP triode V5 obtains the bias current conducting by resistance R 10, diode VD3; NPN triode V6 also obtains the bias current conducting; the trigger current of thyristor VT1 is fallen in short circuit; turn-off VT1 (this does not explain but turn-off working mechanism from thyristor through having facts have proved), and the electronic switch drive current of getting back; connection once more is till u＜u '; Electrochemical capacitor C4 continues emitter junction by triode V5, resistance R 11, R12 and triode V6 and discharges into and can not continue to keep triode V5 conducting, causes triode V6 and turn-offs, and removes the short circuit of thyristor VT1 gate pole, charges once more up to following one-period; So circulation.
Suitably choose the value of electrochemical capacitor C4, little charging rate can guarantee that C4 is full of electricity in very short time after the u value is crossed peak value Um, as u=u " time electronic switch is connected once more, can make the symmetry of forward and backward " double wave " better like this.
The concrete connected mode of D frame is such: the emitter of PNP triode V4 links to each other with the emitter of PNP triode V3, receives the positive output end (11) of rectifier bridge VC1 again; The collector of V3 (13) links to each other with the positive pole of electrochemical capacitor C4, and the negative pole of C4 connects the negative output terminal (12) of rectifier bridge VC1; The collector of V4 and the base stage of V3 are connected in (14) point, and an end of resistance R 7 links to each other with (14) point, and the other end of R7 connects the negative output terminal (12) that causes VC1; The emitter of PNP triode V5 connects the positive pole (13) of electrochemical capacitor C4, and resistance R 11 and resistance R 12 are series at (16) point, and the other end of R11 connects the collector of V5, and the other end of R12 connects the negative output terminal (12) of VC1; Resistance R 10 is in series with the positive pole of diode VD3, and the other end of R10 connects the base stage of V5, and the negative pole of VD3 is connected to the positive output end of VC1 (11); Resistance R 8 and resistance R 9 are series at (15) point, and the base stage of triode V4 also connects (15) point, and the other end of R8 connects the positive output end (11) of VC1, and the other end of R9 is connected on anode (3) point of thyristor VT1; The anode of VT1 (3) also connects the negative pole of diode VD2,
The positive pole of VD2 connects an end (2) of resistance R 1, and the other end of R1 (1) connects the anode output (11) of VC1.
" double wave type " constant current source is than " single wave mode " constant current source, and the electrical network energy utilization ratio is much higher, is about the twice of " single wave mode " constant current source, and ripple is also much smaller, can export big electric current.
In sum, high-voltage constant current source of the present invention, no matter be " single wave mode " constant-current source circuit or " double wave type " constant-current source circuit, they all are four-pole networks, can directly connect electric main, adopt the form that a components and parts part is integrated, a part is external on the technology.Two ac power input ends of external rectifier bridge VC1 promptly are this tetrapolar input ends; Tetrapolar output can be satisfied load continuous current power requirement.These two kinds of constant current source common features are: not filtering behind the civil power input rectifying; They all comprise detection and three partial circuits are exported in execution, driving and electronic switch, isolation and filtering.
The isolation of two kinds of constant current sources is identical with the filtering output circuit, and concrete connected mode is such: the positive pole of isolating diode VD1 connects the anode output (11) of rectifier bridge VC1; The positive pole of electrolytic capacitor filter C3 connects the negative pole (9) of VD1, and the negative pole of C3 connects the tie point (10) of the collector of the collector of V1 and V2.
These two kinds of constant current sources also have its personal characteristics:
1, for " single wave mode " constant current source, three of outward elements no more than (rectifier bridge VC1, Constant Electric Current flow valuve are set resistance R 5, output terminal electrolytic capacitor filter C3); For " double wave type " constant current source, four of outward elements no more than (rectifier bridge VC1, Constant Electric Current flow valuve are set resistance R 5, output terminal electrolytic capacitor filter C3, detected memory electrochemical capacitor C4).
2, for " single wave mode " constant current source, it detects and the concrete connected mode of executive circuit is such: the negative electrode of thyristor VT1 (5) connects the negative output terminal (12) of rectifier bridge VC1; The end of sample resistance R5 links to each other with the negative pole of electrochemical capacitor C2, connects the negative electrode (5) of VT1 again; The end of the other end of R5 (8) connecting resistance R4, the positive pole (7) of another termination C2 of R4, an end of resistance R 3 links to each other the gate pole (4) of another termination VT1 of R3 with (7) point; The anode of VT1 (3) links to each other with an end of resistance R 1, and the other end of R1 (1) connects the positive output end (11) of rectifier bridge VC1.
3, for " single wave mode " constant current source, the concrete connected mode of its driving and electronic switching circuit is such: the emitter of NPN triode V1 connects the base stage of NPN triode V2; The collector of V1 and the collector of V2 are connected in (10) point; After capacitor C 1 and resistance R 2 parallel connections, an end links to each other with the anode (3) of thyristor VT1, and the other end (6) connects the base stage of triode V1; The emitter of V2 connects the end (8) of sample resistance R5; Resistance R 6 is connected between (6) point and (8) point.
4, for " double wave type " constant current source, it detects and the concrete connected mode of executive circuit is such: the negative electrode of thyristor VT1 (5) connects the negative output terminal (12) of rectifier bridge VC1; The end of sample resistance R5 links to each other with the negative pole of electrochemical capacitor C2, connects the negative electrode (5) of VT1 again; The end of the other end of R5 (8) connecting resistance R4, the positive pole (7) of another termination C2 of R4, an end of resistance R 3 links to each other the gate pole (4) of another termination VT1 of R3 with (7) point; The anode of VT1 (3) links to each other with the negative pole of diode VD2, and the positive pole of diode VD2 links to each other with an end (2) of resistance R 1, and the other end of R1 (1) connects the positive output end (11) of rectifier bridge VC1.
5, for " double wave type " constant current source, the concrete connected mode of its driving and electronic switching circuit is such: the emitter of NPN triode V1 connects the base stage of NPN triode V2; The collector of V1 and the collector of V2 are connected in (10) point; After capacitor C 1 and resistance R 2 parallel connections, an end links to each other with the series connection point (2) of resistance R 1, diode VD2 positive pole, and the other end (6) connects the base stage of triode V1; The emitter of V2 connects the end (8) of sample resistance R5; Resistance R 6 is connected between (6) point and (8) point.
6, for " double wave type " constant current source, export three partial circuits except that comprising detection and execution, driving and electronic switch, isolation and filtering, also have a driving circuit again.This more concrete connected mode of driving circuit be such: the emitter of PNP triode V4 links to each other with the emitter of PNP triode V3, receives the positive output end (11) of rectifier bridge VC1 again; The collector of V3 (13) links to each other with the positive pole of electrochemical capacitor C4, and the negative pole of C4 connects the negative output terminal (12) of rectifier bridge VC1; The collector of V4 and the base stage of V3 are connected in (14) point, and an end of resistance R 7 links to each other with (14) point, and the other end of R7 is connected to the negative output terminal of VC1 (12); The emitter of PNP triode V5 connects the positive pole (13) of electrochemical capacitor C4, and resistance R 11 and resistance R 12 are series at (16) point, and the other end of R11 connects the collector of V5, and the other end of R12 connects the negative output terminal (12) of VC1; Resistance R 10 is in series with the positive pole of diode VD3, and the other end of R10 connects the base stage of V5, and the negative pole of VD3 is connected to the positive output end of VC1 (11); Resistance R 8 and resistance R 9 are series at (15) point, and the base stage of triode V4 also connects (15) point, and the other end of R8 connects the positive output end (11) of VC1, and the other end of R9 is connected on anode (3) point of thyristor VT1; The anode of VT1 (3) also connects the negative pole of diode VD2, and the positive pole of VD2 connects an end (2) of resistance R 1, and the other end of R1 (1) connects the anode output (11) of VC1.
Claims (8)
1. one kind " single wave mode " high-voltage constant current source circuit, it is a four-pole network, directly connect electric main, adopt the form that a components and parts part is integrated, a part is external on the technology, can satisfy load continuous current power requirement, two ac power input ends of external rectifier bridge VC1 promptly are this tetrapolar input end IN1, IN2; It is characterized in that: not filtering behind the civil power input rectifying, three of outward elements no more than (rectifier bridge VC1, Constant Electric Current flow valuve are set resistance R 5, output terminal electrolytic capacitor filter C3); This four-pole network comprises detection and three partial circuits are exported in execution, driving and electronic switch, isolation and filtering.
2. one kind " double wave type " high-voltage constant current source circuit, it is a four-pole network, directly connect electric main, adopt the form that a components and parts part is integrated, a part is external on the technology, can satisfy load continuous current power requirement, two ac power input ends of external rectifier bridge VC1 promptly are this tetrapolar input end IN1, IN2; It is characterized in that: not filtering behind the civil power input rectifying, four of outward elements no more than (rectifier bridge VC1, Constant Electric Current flow valuve are set resistance R 5, output terminal electrolytic capacitor filter C3, detected memory electrochemical capacitor C4); This four-pole network comprises detection and execution, driving and electronic switch, drives, four partial circuits are exported in isolation and filtering.
3. " single wave mode " high-voltage constant current source circuit according to claim 1, it is characterized in that: the concrete connected mode of the detection of this constant current source and executive circuit is such: the negative electrode of thyristor VT1 (5) connects the negative output terminal (12) of rectifier bridge VC1; The end of sample resistance R5 links to each other with the negative pole of electrochemical capacitor C2, connects the negative electrode (5) of VT1 again; The end of the other end of R5 (8) connecting resistance R4, the positive pole (7) of another termination C2 of R4, an end of resistance R 3 links to each other the gate pole (4) of another termination VT1 of R3 with (7) point; The anode of VT1 (3) links to each other with an end of resistance R 1, and the other end of R1 (1) connects the positive output end (11) of rectifier bridge VC1.
4. " single wave mode " high-voltage constant current source circuit according to claim 1, it is characterized in that: the concrete connected mode of the driving of this constant current source and electronic switching circuit is such: the emitter of NPN triode V1 connects the base stage of NPN triode V2; The collector of V1 and the collector of V2 are connected in (10) point; After capacitor C 1 and resistance R 2 parallel connections, an end links to each other with the anode (3) of thyristor VT1, and the other end (6) connects the base stage of triode V1; The emitter of V2 connects the end (8) of sample resistance R5; Resistance R 6 is connected between (6) point and (8) point.
5. as " double wave type " high-voltage constant current source circuit as described in the claim 2, it is characterized in that: the concrete connected mode of the detection of this constant current source and executive circuit is such: the negative electrode of thyristor VT1 (5) connects the negative output terminal (12) of rectifier bridge VC1; The end of sample resistance R5 links to each other with the negative pole of electrochemical capacitor C2, connects the negative electrode (5) of VT1 again; The end of the other end of R5 (8) connecting resistance R4, the positive pole (7) of another termination C2 of R4, an end of resistance R 3 links to each other the gate pole (4) of another termination VT1 of R3 with (7) point; The anode of VT1 (3) links to each other with the negative pole of diode VD2, and the positive pole of diode VD2 links to each other with an end (2) of resistance R 1, and the other end of R1 (1) connects the positive output end (11) of rectifier bridge VC1.
6. as " double wave type " high-voltage constant current source circuit as described in the claim 2, it is characterized in that: the concrete connected mode of the driving of this constant current source and electronic switching circuit is such: the emitter of NPN triode V1 connects the base stage of NPN triode V2; The collector of V1 and the collector of V2 are connected in (10) point; After capacitor C 1 and resistance R 2 parallel connections, an end links to each other with the series connection point (2) of resistance R 1, diode VD2 positive pole, and the other end (6) connects the base stage of triode V1; The emitter of V2 connects the end (8) of sample resistance R5; Resistance R 6 is connected between (6) point and (8) point.
7. as " double wave type " high-voltage constant current source circuit as described in the claim 2, it is characterized in that: the concrete connected mode of driving circuit again of this constant current source is such: the emitter of PNP triode V4 links to each other with the emitter of PNP triode V3, receives the positive output end (11) of rectifier bridge VC1 again; The collector of V3 (13) links to each other with the positive pole of electrochemical capacitor C4, and the negative pole of C4 connects the negative output terminal (12) of rectifier bridge VC1; The collector of V4 and the base stage of V3 are connected in (14) point, and an end of resistance R 7 links to each other with (14) point, and the other end of R7 is connected to the negative output terminal of VC1 (12); The emitter of PNP triode V5 connects the positive pole (13) of electrochemical capacitor C4, and resistance R 11 and resistance R 12 are series at (16) point, and the other end of R11 connects the collector of V5, and the other end of R12 connects the negative output terminal (12) of VC1; Resistance R 10 is in series with the positive pole of diode VD3, and the other end of R10 connects the base stage of V5, and the negative pole of VD3 is connected to the positive output end of VC1 (11); Resistance R 8 and resistance R 9 are series at (15) point, and the base stage of triode V4 also connects (15) point, and the other end of R8 connects the positive output end (11) of VC1, and the other end of R9 is connected on anode (3) point of thyristor VT1; The anode of VT1 (3) also connects the negative pole of diode VD2, and the positive pole of VD2 connects an end (2) of resistance R 1, and the other end of R1 (1) connects the anode output (11) of VC1.
8. " single wave mode " high-voltage constant current source circuit and as " double wave type " high-voltage constant current source circuit as described in the claim 2 according to claim 1, it is characterized in that: the isolation of these two kinds of constant current sources, the concrete connected mode of filtering output circuit are such: the positive pole of isolating diode VD1 connects the anode output (11) of rectifier bridge VC1; The positive pole of electrolytic capacitor filter C3 connects the negative pole (9) of VD1, and the negative pole of C3 connects the tie point (10) of the collector of the collector of V1 and V2.
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| CNB2006101569231A CN100557543C (en) | 2006-11-17 | 2006-11-17 | Two kinds of high-voltage constant current source circuits |
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| CNB2006101569231A CN100557543C (en) | 2006-11-17 | 2006-11-17 | Two kinds of high-voltage constant current source circuits |
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| CN100557543C CN100557543C (en) | 2009-11-04 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101511138B (en) * | 2009-03-23 | 2012-05-23 | 杭州电子科技大学 | Constant-current source circuit for traffic control lamp |
| CN102611328A (en) * | 2012-03-06 | 2012-07-25 | 钭惠星 | Low-power consumption isolation-free DC power supply |
| CN103186106A (en) * | 2011-12-28 | 2013-07-03 | 深圳市金威源科技股份有限公司 | High voltage direct current control switch |
| CN105246226A (en) * | 2015-11-18 | 2016-01-13 | 美芯晟科技（北京）有限公司 | LED driver and impedance compensation circuit used for same |
-
2006
- 2006-11-17 CN CNB2006101569231A patent/CN100557543C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101511138B (en) * | 2009-03-23 | 2012-05-23 | 杭州电子科技大学 | Constant-current source circuit for traffic control lamp |
| CN103186106A (en) * | 2011-12-28 | 2013-07-03 | 深圳市金威源科技股份有限公司 | High voltage direct current control switch |
| CN103186106B (en) * | 2011-12-28 | 2016-04-27 | 深圳市金威源科技股份有限公司 | A kind of high voltage direct current control switch |
| CN102611328A (en) * | 2012-03-06 | 2012-07-25 | 钭惠星 | Low-power consumption isolation-free DC power supply |
| CN102611328B (en) * | 2012-03-06 | 2014-09-17 | 钭惠星 | Low-power consumption isolation-free DC power supply |
| CN105246226A (en) * | 2015-11-18 | 2016-01-13 | 美芯晟科技（北京）有限公司 | LED driver and impedance compensation circuit used for same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100557543C (en) | 2009-11-04 |
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