CN202738167U - Constant current power supply of HV-LED lamp without electrolytic capacitor and integrated circuit - Google Patents
Constant current power supply of HV-LED lamp without electrolytic capacitor and integrated circuit Download PDFInfo
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- CN202738167U CN202738167U CN 201220341930 CN201220341930U CN202738167U CN 202738167 U CN202738167 U CN 202738167U CN 201220341930 CN201220341930 CN 201220341930 CN 201220341930 U CN201220341930 U CN 201220341930U CN 202738167 U CN202738167 U CN 202738167U
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Abstract
The utility model discloses a HV-LED lamp does not have electrolytic capacitor and does not have integrated circuit's constant current power supply again, including rectification part, the complementary positive repayment circuit part of direct current cross, direct current-limiting burden repayment circuit part, sampling resistor (R1, R2) and starting resistance (RJ 1, RJ 2). The high-voltage power supply also comprises a BUCK circuit part, a bidirectional thyristor automatic voltage stabilizer or an LC passive alternating current stabilizer. The power supply circuit is simple and easy to realize, high in reliability and low in cost, meets the requirements of matching power supply with 5 ten thousand hours of long service life of the HV-LED and wide power supply range, and improves the service life and reliability of the HV-LED. The utility model discloses a power coefficient is higher, and the electric work efficiency is directly proportional to the ratio of HV-LED lamp voltage and input power voltage Uin.
Description
Technical field
The present invention relates to the power circuit field, relate in particular to HV-LED lamp no electrolytic capacitor again without the constant-current supply of integrated circuit.
Background technology
At present, the HV-LED lamp is because many merits is widely used in numerous industries, and along with the fast development of economy, to the higher requirement of life-span proposition of HV-LED lamp, and up to the present, the life-span of HV-LED lamp depends primarily on the life-span of power supply.Well-known HV-LED lamp constant-current supply, mainly be that the zero passage positive half wave of energy storage filter action after rectification that utilizes electrochemical capacitor becomes near direct current, give the HV-LED load supplying, and the life and reliability of electrochemical capacitor is very low, directly has influence on the useful life of HV-LED lamp.And most of power supplys all contain integrated circuit, and any one components and parts damages the life and reliability that all can have influence on power supply in the integrated circuit.General traditional LED power supply can't mate 50,000 hours long-lives or more permanent led light source, has seriously restricted the LED lamp as the energy-saving and cost-reducing advantage that subtracts carbon.
Summary of the invention
For overcome existing HV-LED lamp constant-current supply because of contain electrochemical capacitor and integrated circuit cause the life-span low, reliability is low and can't improve the deficiency of the problems such as electrical power, the invention provides a kind of HV-LED lamp no electrolytic capacitor again without the constant-current supply of integrated circuit.
The technical solution adopted for the present invention to solve the technical problems is: comprise rectifying part, described rectifying part comprises diode (D3, D4, D5, D6), the end of AC power Uin links to each other with an end of fuse melting silk (F), diode (D3) is anodal to be connected together with diode (D6) negative pole, and be connected with the other end of fuse melting silk F, diode (D5) is anodal to be connected with diode (D4) negative pole, and be connected with the other end of AC power Uin, diode (D3) negative pole is connected with diode (D5) negative pole, diode (D4) is anodal to be connected with diode (D6) is anodal, also comprise high voltage power triode direct current cross complementary positive feedback circuit part, low pressure triode direct current negative feedback circuit part, sample resistance (R1, R2) and starting resistance (RJ1, RJ2), described direct current cross complementary positive feedback circuit part is comprised of high-tension high-power PNP triode (Q1) and high-tension high-power NPN triode (Q2), described direct current negative feedback circuit part is comprised of low-voltage, high-current PNP triode (q1) and low-voltage, high-current NPN triode (q2), one end of sample resistance (R1) is connected with diode (D3) negative pole, the other end is connected with the emitter of triode (Q1) and the base stage of triode (q1), the emitter of triode (q1) is connected with the negative pole of diode (D5), the base stage of triode (Q1) is connected with the collector electrode of triode (q1), starting resistance (RJ1) and starting resistance (RJ2) series connection, be serially connected between triode (Q1) base stage and triode (Q2) base stage, the emitter of triode (Q2) is connected with the base stage of triode (q2), sample resistance (R2) is serially connected between the emitter of the emitter of triode (Q2) and triode (q2), the emitter of triode (q2) is connected with diode (D4) is anodal, the positive pole of load HV-LED1 is connected with 2 pin of constant-current supply, the negative pole of load HV-LED1 is connected with 3 pin of constant-current supply, the positive pole of load HV-LED2 is connected with 5 pin of constant-current supply, and the negative pole of load HV-LED2 is connected with 6 pin of constant-current supply.Described HV-LED load is the HV-LED group, and described HV-LED group is by more than one HV-LED series connection, and the group of connecting with more than one HV-LED again is in parallel.
Also comprise the BUCK circuit, described BUCK circuit contains inductance (L1), diode (D1), electric capacity (C1) and inductance (L2), diode (D2), electric capacity (C2), the negative pole of diode (D1) is connected with diode (D3) negative pole, inductance (L1) is concatenated between 2 pin and triode (Q1) collector electrode of constant-current supply, one end of electric capacity (C1) is connected with 2 pin of constant-current supply, the other end is connected with 3 pin of constant-current supply after being connected with diode (D1) is anodal again, the negative pole of diode (D2) is connected with diode (D5) negative pole, inductance (L2) is concatenated between 5 pin and triode (q1) collector electrode of constant-current supply, one end of electric capacity (C2) is connected with 5 pin of constant-current supply, and the other end is connected with 4 pin of constant-current supply after being connected with diode (D2) is anodal again.In the described BUCK circuit, the series resonance frequency of L-C is three times of HV-LED lamp input power UIN frequency.
Also comprise bidirectional triode thyristor automatic voltage regulator (8), the input of described bidirectional triode thyristor automatic voltage regulator (8) is connected with AC power Uin, and output is connected with rectifying part.
Also comprise the passive ac current regulator of LC (9), the input of the passive ac current regulator of described LC (9) is connected with AC power Uin, output is connected with rectifying part, the passive ac current regulator of described LC (9) comprises electric capacity (C), inductance (L, Lf), electric capacity (C) is connected with the end of AC power Uin with inductance (L) series connection is rear, one end of inductance (Lf) is connected with inductance (L), and the other end is connected with the other end of AC power Uin.
The invention has the beneficial effects as follows: circuit is simple and easy to realize that reliability is high, and cost is low, satisfies and the coupling power supply of 50,000 hours HV-LED long-lives and wide power area requirement, improves useful life and the reliability of HV-LED, improves electric work efficient.
Description of drawings
Fig. 1 is that HV-LED lamp no electrolytic capacitor of the present invention is again without the basic circuit diagram of the constant-current supply of integrated circuit.
Fig. 2 is the circuit diagram that adds the BUCK circuit on Fig. 1 basis.
Fig. 3 is the circuit diagram that adds the bidirectional triode thyristor automatic voltage regulator on Fig. 2 basis.
Fig. 4 is the circuit diagram that adds the passive ac current regulator of LC on Fig. 2 basis.
The invention will be further described below in conjunction with drawings and Examples.
1,2,3,4,5,61 pin, 2 pin, 3 pin, 4 pin, 5 pin, 6 pin that are respectively constant-current supply among the figure, 7 is constant-current supply shown in Figure 1, and 8 is the bidirectional triode thyristor automatic voltage regulator, and 9 is the passive ac current regulator of LC.
Embodiment
The embodiment of the following stated understands the present invention in detail.
In Fig. 1, starting resistance RJ1 and RJ2 are the above high resistance measurements of 1 megaohm, and limiting starting current ij is very small:
Yet, collector current iec1=β 1 * ib1 of triode Q1, collector current iec2=β 2 * ib2 of triode Q2, β 1 and β 2 are the current amplification factor much larger than 1,
i
j≈ib1≈ib2
Be iec1=β 1 * i
j, iec2=β 2 * i
j
Therefore, this small startup power supply i
j, through triode Q1 and Q2(PNP-NPN) and the effect of cross complementary positive feedback amplifies, and becomes the I of triode Q1 and Q2
CE, namely become the specified continuous current of load HV-LED1 and HV-LED2.
Simultaneously, seal in current sense resistor R1 in the emitter e of triode Q1, the emitter current Ie sample resistance R1 that flows through, the voltage drop UR1 that produces, as UR1 during greater than the e-b of Q1 knot conducting voltage (being generally 0.65V), triode q1 conducting, the iec of q1 shunts the ib1 of Q1.Therefore, low-voltage, high-current pliotron q1 is controlled by the emitter of high-tension high-power triode Q1, q1 plays the direct current negative feedback to Q1, has ended triode Q1 and Q2(PNP-NPN) cross complementary positive feedback process, make Q1 be operated in constant current iec working condition.
The rated current of HV-LED1 is
In like manner, as the voltage drop UR2 of current sampling resistor R2 during greater than 0.65 volt, q2 plays the DC feedback effect to Q2, makes equally triode Q2 be operated in constant current iec2 working condition.
The rated current of HV-LED2 is
Get R1=R2
So: IHV-LED1=IHV-LED2=0.65/R1=0.65/R2
Can realize load HV-LED1 and HV-LED2 are carried out constant current-supplying by this circuit.
Described HV-LED load can be HV-LED group, and described HV-LED group is by more than one HV-LED series connection, and the group of connecting with more than one HV-LED again is in parallel, has avoided a HV-LED lamp to break and affects full lamp and extinguish.
Because there is minimum bright light voltage U min in HV-LED, when the minimum bright light voltage U of keeping of supply voltage electricity shortage min, enter the dead band of HV-LED lamp, the phenomenon of light flash appears easily.Among Fig. 2, as further improvement, on Fig. 1 basis, add the BUCK circuit,
Described BUCK circuit contains inductance (L1), diode (D1), electric capacity (C1) and inductance (L2), diode (D2), electric capacity (C2), the negative pole of diode (D1) is connected with diode (D3) negative pole, inductance (L1) is concatenated between 2 pin and triode (Q1) collector electrode of constant-current supply, one end of electric capacity (C1) is connected with 2 pin of constant-current supply, the other end is connected with 3 pin of constant-current supply after being connected with diode (D1) is anodal again, the negative pole of diode (D2) is connected with diode (D5) negative pole, inductance (L2) is concatenated between 5 pin and triode (q1) collector electrode of constant-current supply, one end of electric capacity (C2) is connected with 5 pin of constant-current supply, the other end is connected with 4 pin of constant-current supply after being connected with diode (D2) is anodal again, and capacitor C 1 and C2 are common electric capacity.When the electric current of HV-LED1 and HV-LED2 lamp descended, HV-LED1 and HV-LED2 were equivalent to a BUCK switch and open circuit, and this electric current flows through inductance L 1, L2, plays the afterflow effect of BUCK topology.Electric energy conversion is magnetic energy WL: square (I of inductance magnetic energy WL and inductive current
L 2) be directly proportional:
At this moment L energy storage WL palpus continuous current discharge electricity, namely magnetic energy WL forms the BUCK topology through capacitor C and diode D, is converted into the energy storage of electric capacity
Because Uc equals the high voltage of HV-LED, so needn't just can store more electric energy Wc with the electrochemical capacitor of high capacitance, effectively improve HV-LED flicker problem.
Find in the practice, it is 50 hertz such as supply frequency, behind full-wave bridge rectifier, the HV-LED current first harmonics is 100 hertz direct current half-wave, adjust to L-C resonance in the research and development in frequency tripling (150 hertz), at this moment the current ripples of HV-LED is very little, when namely the L-C series resonance is three times of fundamental frequency, can effectively reduce the ripple coefficient of HV-LED electric current, the luminous very stable flicker free of HV-LED this moment.
According to the luminous operation of the customer power supply supply voltage minimum design specified constant current of HV-LED, when voltage raises, because triode Q1-Q2 all is operated in constant current working condition HV-LED1 and the HV-LED2 lamp can not burn out, still, the Q1 (V of PNP
EC) and the V of Q2(NPN
CE) voltage drop is too large, must cause the electric work decrease in efficiency.As further improvement, add the bidirectional triode thyristor automatic voltage regulator in circuit the inside, this pressurizer input ac power, again with out-put supply to rectifying part, with the occasion of mains voltage variations wider range of adapting to the user.Perhaps seal in the passive AC voltage regulator of LC in circuit, this pressurizer is connected with the AC power of input, and out-put supply can low-costly realize that to rectifying part high electric work efficient is operated under the wide power voltage conditions to the HV-LED constant current-supplying again.
The present invention is not limited to above-mentioned preferred forms, and other any identical with the present invention or akin circuit that anyone draws under enlightenment of the present invention all belong within protection scope of the present invention.
Claims (6)
1. a HV-LED lamp no electrolytic capacitor is again without the constant-current supply of integrated circuit, comprise rectifying part, described rectifying part comprises diode (D3, D4, D5, D6), the end of AC power Uin links to each other with an end of fuse melting silk (F), diode (D3) is anodal to be connected together with diode (D6) negative pole, and be connected with the other end of fuse melting silk F, diode (D5) is anodal to be connected with diode (D4) negative pole, and be connected with the other end of AC power Uin, diode (D3) negative pole is connected with diode (D5) negative pole, diode (D4) is anodal to be connected with diode (D6) is anodal, it is characterized in that: also comprise high voltage power triode direct current cross complementary positive feedback circuit part, low pressure triode direct current negative feedback circuit part, sample resistance (R1, R2) and starting resistance (RJ1, RJ2), described direct current cross complementary positive feedback circuit part is comprised of high-tension high-power PNP triode (Q1) and high-tension high-power NPN triode (Q2), described direct current negative feedback circuit part is comprised of low-voltage, high-current PNP triode (q1) and low-voltage, high-current NPN triode (q2), one end of sample resistance (R1) is connected with diode (D3) negative pole, the other end is connected with the emitter of triode (Q1) and the base stage of triode (q1), the emitter of triode (q1) is connected with the negative pole of diode (D5), the base stage of triode (Q1) is connected with the collector electrode of triode (q1), starting resistance (RJ1) and starting resistance (RJ2) series connection, be serially connected between triode (Q1) base stage and triode (Q2) base stage, the emitter of triode (Q2) is connected with the base stage of triode (q2), sample resistance (R2) is serially connected between the emitter of the emitter of triode (Q2) and triode (q2), the emitter of triode (q2) is connected with diode (D4) is anodal, the positive pole of load HV-LED1 is connected with 2 pin of constant-current supply, the negative pole of load HV-LED1 is connected with 3 pin of constant-current supply, the positive pole of load HV-LED2 is connected with 5 pin of constant-current supply, and the negative pole of load HV-LED2 is connected with 6 pin of constant-current supply.
2. HV-LED lamp no electrolytic capacitor according to claim 1 is again without the constant-current supply of integrated circuit, it is characterized in that: described HV-LED load is the HV-LED group, described HV-LED group is by more than one HV-LED series connection, and the group of connecting with more than one HV-LED again is in parallel.
3. HV-LED lamp no electrolytic capacitor according to claim 2 is again without the constant-current supply of integrated circuit, it is characterized in that: also comprise the BUCK circuit, described BUCK circuit contains inductance (L1), diode (D1), electric capacity (C1) and inductance (L2), diode (D2), electric capacity (C2), the negative pole of diode (D1) is connected with diode (D3) negative pole, inductance (L1) is concatenated between 2 pin and triode (Q1) collector electrode of constant-current supply, one end of electric capacity (C1) is connected with 2 pin of constant-current supply, the other end is connected with 3 pin of constant-current supply after being connected with diode (D1) is anodal again, the negative pole of diode (D2) is connected with diode (D5) negative pole, inductance (L2) is concatenated between 5 pin and triode (q1) collector electrode of constant-current supply, one end of electric capacity (C2) is connected with 5 pin of constant-current supply, and the other end is connected with 4 pin of constant-current supply after being connected with diode (D2) is anodal again.
4. HV-LED lamp no electrolytic capacitor according to claim 3 is characterized in that again without the constant-current supply of integrated circuit: in the described BUCK circuit, the series resonance frequency of L-C is three times of HV-LED lamp input power UIN frequency.
According to claim 1 and 2 or 3 or 4 described HV-LED lamp no electrolytic capacitors again without the constant-current supply of integrated circuit, it is characterized in that: also comprise bidirectional triode thyristor automatic voltage regulator (8), the input of described bidirectional triode thyristor automatic voltage regulator (8) is connected with AC power Uin, and output is connected with rectifying part.
According to claim 1 and 2 or 3 or 4 described HV-LED lamp no electrolytic capacitors again without the constant-current supply of integrated circuit, it is characterized in that: also comprise the passive ac current regulator of LC (9), the input of the passive ac current regulator of described LC (9) is connected with AC power Uin, output is connected with rectifying part, the passive ac current regulator of described LC (9) comprises electric capacity (C), inductance (L, Lf), electric capacity (C) is connected with the end of AC power Uin with inductance (L) series connection is rear, one end of inductance (Lf) is connected with inductance (L), and the other end is connected with the other end of AC power Uin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220341930 CN202738167U (en) | 2012-07-13 | 2012-07-13 | Constant current power supply of HV-LED lamp without electrolytic capacitor and integrated circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220341930 CN202738167U (en) | 2012-07-13 | 2012-07-13 | Constant current power supply of HV-LED lamp without electrolytic capacitor and integrated circuit |
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|---|---|
| CN202738167U true CN202738167U (en) | 2013-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220341930 Expired - Fee Related CN202738167U (en) | 2012-07-13 | 2012-07-13 | Constant current power supply of HV-LED lamp without electrolytic capacitor and integrated circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102740525A (en) * | 2012-07-13 | 2012-10-17 | 木林森股份有限公司 | Constant current power supply of HV-LED lamp without electrolytic capacitor and integrated circuit |
| CN104185346A (en) * | 2014-08-28 | 2014-12-03 | 芜湖市神龙新能源科技有限公司 | Onboard constant-current surface mount device type LED fluorescent lamp |
-
2012
- 2012-07-13 CN CN 201220341930 patent/CN202738167U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102740525A (en) * | 2012-07-13 | 2012-10-17 | 木林森股份有限公司 | Constant current power supply of HV-LED lamp without electrolytic capacitor and integrated circuit |
| CN104185346A (en) * | 2014-08-28 | 2014-12-03 | 芜湖市神龙新能源科技有限公司 | Onboard constant-current surface mount device type LED fluorescent lamp |
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