WO2010054523A1

WO2010054523A1 - Combination of a drive power supply of high-power led lamp and matched lamps

Info

Publication number: WO2010054523A1
Application number: PCT/CN2009/000485
Authority: WO
Inventors: 沈锦祥
Original assignee: Shen Jinxiang
Priority date: 2008-11-13
Filing date: 2009-05-04
Publication date: 2010-05-20
Also published as: CN101420804B; CN101420804A

Abstract

A combination of a drive power supply of high-power LED street lamp and matched lamps includes a drive power supply and lamp groups circuit (5). The drive power supply is composed of a filter rectifier circuit (1), a half-bridge inverter circuit (2), a constant power control circuit (3), and an inductor current limiting circuit (4). The alternating current with power frequency 220V is inputted to an input end（6） of a filter rectifier circuit (1). The inductor current limiting circuit (4) is composed together of more than one high-frequency inductor. The lamp groups circuit (5) is composed of more than one route of LED; each route of LED is composed of two bunches of LED; a street lamp groups circuit is composed of two bunches of LED lamps which is reversely parallel connected; each bunch of LED lamps is composed in series of more than one high-power LED.

Description

Combination of high-power LED lamp driving power supply and its matching lamp

The invention relates to a combination of a high-power LED lamp driving power source and a matching lamp thereof, in particular to a high-power LED lamp driving power source capable of adapting to a power frequency 90V-260V AC input and output working voltage greater than 3.8V high-frequency pulse voltage and Its combination of matching lights.

technical background

At present, the existing high-power LED lamps generally use AC-DC plus constant current driving lamps to work, because this technology circuit requires a switching power supply to convert the alternating current into direct current and then through the constant current to drive the LED lamp to work, due to the line Complex, the components used have high failure rate and the reliability of the use is affected. Moreover, the loss of the intermediate transition of the technical circuit will affect the conversion efficiency of the power supply, which will cause the overall efficiency of the power supply to decrease. The input power factor is about 0.6, and the efficiency is about 0.8. To further increase the input power factor and efficiency, it is necessary to increase the cost. The result is to face the problem of reliability, and further to the combination of the lamps. Form analysis, the combination of such lamps is poorly fault-tolerant. Usually, multiple LED lamps are connected in series to form a group. The apparent power of LED lamps is usually composed of multiple sets of strings, and then connected to the power supply, assuming that one of the lamps is damaged. The lights of the group will be extinguished. This phenomenon is not allowed in the actual operation of the LED lights.

Summary of the invention

The object of the present invention is to solve the above-mentioned deficiencies of the prior art products, and to provide an AC input with a power frequency of 90V-260V, high power factor, high conversion efficiency, constant power characteristics, perfect protection function, and lamp combination. Good fault tolerance, output operating voltage is greater than 3.8V high frequency pulse voltage A combination of high power LED light drive power supplies and their associated lights.

In order to achieve the above object, the invention provides a combination of a high-power LED street lamp driving power source and a matching lamp thereof, which comprises a driving power source and a lamp combination circuit, characterized in that the driving power source is a filter rectifier circuit, a half bridge inverter circuit, and a constant The power control circuit is composed of an inductor current limiting circuit, and the input end of the filter rectifier circuit is input with a power frequency of 220V alternating current; the inductor current limiting circuit is composed of more than one high frequency inductor, and the lamp combination circuit is composed of LEDs including more than one road, each road The LED consists of two strings of LED lights. The two strings of LEDs are connected in reverse parallel to form a street lamp combination circuit. Each string of LED lamps is composed of more than one high-power LEDs connected in series; one end of the high-frequency inductor is connected in series and then connected to the high-frequency inductor. One end of the secondary N2 of the transformer T and the other end of the high frequency inductor are respectively connected to the a ends of the LED groups of the LEDs; the aa ends of the respective lamp groups are connected in common and then connected to the other end of the secondary N2 of the high frequency transformer T' .

The filter rectifier circuit consists of a fuse FU, capacitors C0, C0a, Cl, C2, CY1, CY2, differential mode inductance! ^, common mode inductor EMI, varistor VR, rectifier bridge stack BR together constitute a conventional filter rectifier circuit, in which the capacitor C0, COa are respectively connected to the input AC power supply L terminal, N terminal, capacitor Cl, through the differential mode The inductor L and the fuse FU are respectively connected to the input AC power source, and the input AC power source passes through the common mode inductor EMI and the varistor VR, the capacitor C2, the rectifier BR stack BR pin BR1, the pin BR2, the capacitor CY1, the CY2 terminal The other ends of the capacitors CY1 and CY2 are connected to the ground PE. The pin BR2 of the rectifier bridge stack BR outputs the pulsating positive direct current (V+), and the pin BR4 outputs the negative direct current GND.

The half bridge inverter circuit is composed of an integrated circuit U1, resistors R1, R2, R3, R4, R5, R6, R7, R8, R9, R13, R14, capacitors C3, C4, C5, C6, C7, C8, C9, C10, C11, C12, C13, CY3, CY4, diodes D1, D2, D3, D4, D5, D6, voltage regulator The diode DW, the unidirectional thyristor SCR, the FET Ql, Q2, and the high frequency transformer T are combined, wherein one end of the resistors R1 and R2 is connected to the positive direct current (V+), and the other end of the resistor R1 is passed through the capacitor C3 and the voltage regulator. The negative terminal of the diode ring and the other end of the resistor R2 are connected to the positive terminal of the capacitor C4 through the diode D1, C5, the U1 pin U1-1 of the integrated circuit, the positive terminal of the Zener diode DW, the negative terminal of the capacitor C4, the C5, and the U1 pin of the integrated circuit U1. 2 connected to GND to form the start-up circuit; R3, C6 in parallel, one end is connected with U1 pin U1-3, the other end is connected to GND to form a timing shutdown circuit; unidirectional thyristor SCR, diode D5, D6, resistor R7 , R8, R9, capacitor C7, CIO, Cl l form a protection circuit, wherein the anode of the unidirectional thyristor SCR is connected to the integrated circuit U1 pin Ul-1, the cathode of the unidirectional thyristor SCR is connected to the GND, one-way The control electrode of the silicon controlled SCR is connected to the S pole of the integrated circuit U1 pin Ul-4, the pin Ul-6, and the field effect transistor Q2 through diodes D5, D6, resistors R8, R7, R9, capacitors C7, C10, and C11, respectively. ; Resistor R4, R5, R6, R13, R14, FET Ql, Q2, capacitor C12 C13. The high-frequency transformer T constitutes a switch inverter output circuit, wherein the integrated circuit U1 pin Ul-7 and the pin U1-5 are respectively connected to the G pole of the field effect transistor Q Q2 through the resistors R4 and R5, and the integrated circuit U1 pin U1-6 is connected to the D pole of S, Q2 of FET Q1, the primary N1 end of high frequency transformer T, and the primary N2 end of high frequency transformer T through capacitors C12, C13, resistors R13, R14 and positive direct current (V+), respectively. GND connection, FET of Q1 transistor Q1 is connected to positive DC (V+), S pole of FET Q2 is connected to GND through resistor R6, resistor R7 is connected to pin U1-4 of U1; capacitor C9, diode D3, D4 The charge pump circuit, wherein the high-frequency transformer T primary N1 terminal is connected to the diode D3 positive electrode and the D4 negative electrode through the capacitor C9, the diode D3 negative terminal is connected to the GND, and the D4 positive electrode is connected to the integrated circuit U1 pin Ul-1; the diode D2 and the capacitor C8 are self-contained. The boosting element, wherein the diode D2 is connected to the integrated circuit U1 pin Ul-1, the diode D2 is connected to the integrated circuit U1 pin Ul-8. The constant power control circuit is composed of a photocoupler U2, a precision three-terminal regulator U3, resistors R10, R11, R12, capacitors C14, C15, and a diode D7, wherein the anode of the diode D7 is connected to the secondary of the high-frequency transformer T. The N2-1 terminal of N2 and the negative terminal of diode D7 pass through the resistors R10 and R11. The voltage signal is filtered by capacitor C15. The sampling signal of the output power is respectively connected to the photocoupler U2 pin U2-1 and precision through the resistors R10, R11 and C15. Three-terminal regulator U3 pin R, capacitor C14, resistor R12- terminal, capacitor C14, resistor R12, the other end is connected to the precision three-terminal regulator U3 pin K, optocoupler U2 pin U2-2, three-terminal The voltage regulator U3 pin A, the negative pole of the capacitor C15, the N2-2 terminal of the secondary N2 of the high-frequency transformer T, the U2 pin U2-3 of the photocoupler, and the U2-4 pin are respectively connected to the GND, and the integrated circuit U1 is cited. Feet Ul-4.

The inductor current limiting circuit is composed of high frequency inductors L1 to L12, and the high frequency inductor can be composed of one to more than twelve high frequency inductors as needed, wherein the L-1 terminals of the high frequency inductors L1 to L12 are connected in common One end of the secondary N2 connected to the high-frequency transformer T and the L-2 end of the high-frequency inductors L1 to L12 are respectively connected to the a-end of each of the lamp groups of the LED.

The lamp combination circuit is composed of a high-power light-emitting diode LED1 to LED6, and one to N LEDs can be used as needed; wherein the negative electrode of the LED1 is connected to the positive electrode of the LED2, the negative electrode of the LED2 is connected to the positive electrode of the LED3, and the LEDn and the like form a light string. In the same way, the LEDs LED4, LED5, and LED6 are connected to the LEDn and the like, and then form a light string. Then, the two light strings are connected in reverse parallel to form a street light combination circuit. The LED light string has an odd number and an even number, but The number of the two strings must be the same. The lamp group is connected to the L-2 end of the high frequency inductor L1 to L12, the aa end of the lamp group is connected in common, and then connected to the N2-2 end of the secondary N2 of the high frequency transformer T.

The combination circuit of the high-power LED lamp driving power source and the matching lamp designed by the invention has the advantages of reasonable design, simple structure, stable application characteristics of the driving power source and the matching lamp, and better performance. The constant power characteristics, power input power factor is greater than 0.95, efficiency is greater than 0.97, high reliability, long service life, etc., can be widely used in various high-power LED lighting applications. DRAWINGS

The invention will now be further described with reference to the accompanying drawings. Figure 1 is a schematic block diagram of the present invention;

Figure 2 is a circuit schematic of the present invention. Wherein: the dotted line frame 1 in Figure 2 is a conventional filter rectifier circuit, the dotted line frame 2 is a half bridge inverter circuit, the dotted line frame 3 is a constant power control circuit, the dotted line frame 4 is an inductor current limiting circuit, and the dotted line frame 5 is a lamp combination. Circuit. detailed description

Example 1:

As shown in FIG. 1 , the combination of the high-power LED lamp driving power source and the matching lamp provided by the embodiment includes a driving power supply and a lamp combination circuit, wherein the driving power source is a filter rectifier circuit 1 and a half bridge inverter circuit 2 The power control circuit 3 is composed of an inductor current limiting circuit 4, and the input terminal 6 is input with a power frequency of 220V alternating current. As shown in FIG. 2, the filter rectifier circuit 1 is composed of a fuse FU, a capacitor C0, a COa, a Cl, a C2, a CYK CY2, a differential mode inductor L, a common mode inductor EMI, a varistor VR, and a rectifier bridge stack BR. Together, they form a conventional filter rectifier circuit, in which the capacitors C0 and COa are respectively connected to the input AC power source L terminal, the N terminal, the capacitor Cl, the differential mode inductor L, and the fuse FU respectively connected to the input AC power source, and the input AC power source. The common mode inductor EMI is respectively connected to the varistor VR, the capacitor C2, the pin BR1 of the rectifier bridge stack BR, the pin BR2, the capacitors CY1 and CY2, and the other ends of the capacitors CY1 and CY2 are connected to the ground PE, and rectified. Bridge BR BR pin BR2 output ripple The positive direct current (V+), the bow I pin BR4 output negative direct current GKD, wherein the input power frequency 220 volt AC power supply is respectively connected by the port L, N; the capacitor C0, C0a, Cl, CY1, CY2 inductance L group forming differential mode The filter, the inductor EMI, C2, the common mode filter, and the series connection of the capacitors CY1 and CY2, the indirect point grounding PE, the purpose of setting the filter circuit is to ensure that the driving power source can obtain good electromagnetic compatibility characteristics; Pin BR2 outputs pulsating positive DC (V+) and pin BR4 outputs negative DC G).

As shown in 2 in Figure 2, the half-bridge inverter circuit 2 contains a schematic diagram of the integrated circuit Ul, the FET Ql, Q2, the high-frequency transformer T, the diode, and other resistors and capacitors.

The half bridge inverter circuit 2 is composed of an integrated circuit U1, resistors R1, R2, R3, R4, R5, R6, R7, R8, R9, R13, R14, capacitors C3, C4, C5, C6, C7, C8, C9 , CIO, C11, C12, C13, CY3, CY4, diodes D1, D2, D3, D4, D5, D6, Zener diode DW, unidirectional thyristor SCR, FET Ql, Q2, high frequency transformer T The composition, wherein one end of the resistors R1, R2 is connected to the positive direct current (V+), the other end of the resistor R1 passes through the capacitor C3 and the negative pole of the Zener diode DW, and the other end of the resistor R2 passes through the diode D1 and the capacitor C4 positive pole, C5, integrated circuit U1 pin U1-1 is connected, the positive pole of Zener diode DW, capacitor C4 negative pole, C5, integrated circuit U1 pin U1-2 is connected to GND to form the start circuit; R3, C6 are connected in parallel and U1 pin U1 -3 connection, the other end is connected to GND to form a timing shutdown circuit; the unidirectional thyristor SCR, diodes D5, D6, resistors R7, R8, R9, capacitors C7, C10, C11 form a protection circuit, wherein the unidirectional thyristor SCR The anode is connected to the integrated circuit Ul pin Ul-1, the cathode of the unidirectional thyristor SCR is connected to the GND, To the control electrode of the thyristor SCR through the diodes D5, D6, resistors R8, R7, R9, capacitors C7, C10, C11 and the integrated circuit U1 pin Ul-4, pin Ul-6, field effect transistor Q2 Extremely connected; resistors R4, R5, R6, R13, R14, field The effect tube Ql, Q2, the capacitor C12, C13, the high frequency transformer T constitute a switch inverter output circuit, wherein the integrated circuit U1 pin Ul-7, the bow 1 pin U1-5 respectively pass the resistor R4, 5 and the field effect transistor Ql, The G pole of Q2 is connected, the U1 pin of the integrated circuit U1 is connected to the D pole of the S, Q2 of the FET Q1, the primary N1 end of the high frequency transformer T, the primary N2 end of the high frequency transformer T passes the capacitors C12, C13, and the resistor R13 and R14 are connected to positive DC (V+:) and GND respectively. The D-pole of FET Q1 is connected to positive DC (V+), the S-pole of FET Q2 is connected to GND through resistor R6, and the resistor R7 is connected to the pin of U1. U1-4; Capacitor C9, diodes D3, D4 form a charge pump circuit, in which the primary N1 terminal of the high-frequency transformer T is connected to the anode of the diode D3 and the cathode of the D4 via the capacitor C9, the anode of the diode D3 is connected to the GND, and the anode of the D4 is connected to the integrated circuit U1. The pin U1-1; the diode D2 and the capacitor C8 are bootstrap boosting elements, wherein the diode D2 is connected to the integrated circuit U1 pin Ul-1, and the diode D2 is connected to the integrated circuit U1 pin Ul-8.

In the figure, the resistors R1, R2, capacitors C3, C4, C5, diode D1, and Zener diode DW form a startup circuit. When the voltage of the pin U1-1 of the integrated circuit U1 reaches the startup threshold voltage of 11.8V, the integrated circuit U1 starts to work. R3, C6 are connected in parallel with one end of U1 pin U1-3, and the other end is connected to GND to form a timing shutdown circuit; unidirectional thyristor SCR, diode D5, D6, resistor R7, R8, R9, capacitor C7, Cll Forming a protection circuit, when the voltage of U1 pin U1-4 exceeds 0.5V, the unidirectional thyristor SCR turns on U1 is turned off; resistors R4, R5, R6, R13, R14, FET Ql, Q2, capacitor C12, C13, high-frequency transformer T constitute the switch inverter output circuit, the signal is provided by U1 pin Ul-5, pin U1-7 to Q2, Ql, Q2, Q1 turn on, through high-frequency transformer The primary N1 of T realizes charging and discharging of capacitors C12 and C13, and induces a 30KH high-frequency pulse voltage of about 12V in secondary N2, R6 is a current limiting resistor, and converts the current signal into a voltage signal through R7. U1 pin Ul-4, when Ul When the voltage of the pin Ul-4 exceeds 0.5V, the unidirectional thyristor SCR is turned on, U1 is turned off; the capacitor C9, the diodes D3, and D4 form a charge pump circuit output to the integrated circuit U1 pin Ul-1, providing it with The operating voltage is maintained to further reduce the loss of U1. Diode D2 and capacitor C8 are bootstrap boosting elements. The function is to supply power to the high-side drive of integrated circuit U1 to ensure reliable operation of U1 pin U1-7.

As shown in Figure 3, the constant power control circuit 3 contains a schematic diagram of a photocoupler U2, a precision three-terminal regulator U3, and other diodes, resistors, and capacitors.

The constant power control circuit 3 is composed of a photocoupler U2, a precision three-terminal regulator U3, resistors R10, R11, R12, capacitors C14, C15, and a diode D7, wherein the anode of the diode D7 is connected to the high frequency transformer T. The N2-1 terminal of the stage N2 and the negative terminal of the diode D7 pass through the voltage signals of the resistors R10 and R11 and are filtered by the capacitor C15 as sampling signals of the output power respectively through the resistors R10, R11 and the capacitor C15, respectively, to the photocoupler U2 pin U2-1 and Precision three-terminal regulator U3 pin R, capacitor C14, resistor R12- terminal, capacitor C14, resistor R12, the other end is connected to the precision three-terminal regulator U3 pin K, optocoupler U2 pin U2-2, three Terminal regulator U3 pin A, capacitor C15 negative terminal, high-frequency transformer T secondary N2 N2-2 terminal, photocoupler U2 pin U2-3, pin U2-4 are connected to GND, integrated circuit U1 Pin Ul-4.

In the figure, the anode of the diode D7 is connected to the N2-1 end of the secondary N2 of the high-frequency transformer T, the N2-2 end thereof is in an analog state, and the negative output of the diode is rectified and detected by the diode D7. The signal is filtered by the capacitor C15 as the output power of the sampling signal through the resistors R10, R11 respectively to the optocoupler U2 and the precision three-terminal regulator U3 divided to control the voltage of the integrated circuit U1 pin U1-4 is equivalent to a change The switching frequency of the inverter and the leakage inductance of the high-frequency transformer T make the lamp load power substantially stable within a certain range. Example 2:

As shown in FIG. 2, the inductor current limiting circuit 4 includes a high frequency inductor L1-L12, and the high frequency inductor L1-L12 can be composed of one to more than twelve high frequency inductors as needed, wherein the high frequency The L-1 terminals of the inductors L1-L12 are connected in series and connected to one end of the secondary N2 of the high-frequency transformer T, and the L-2 terminals of the high-frequency inductors L1-L12 are respectively connected to the a-ends of the lamp groups of the LEDs. The inductance of the high-frequency inductor has a great influence on the lamp current. In the specific implementation, the inductance can be calculated by the following formula:

Z= UO-UL L= Z

IL 2 Uf where Z: output loop impedance (Ω), UO: output voltage (V), UL: lamp voltage (V) L : inductance (m), f: operating frequency (khz)

Example 3:

As shown in FIG. 2, the lamp combination circuit 5 includes a high-power LEDs LED1-LED3 and LED4-LED6 to form a street lamp combination circuit. Here, one to n LEDs can also be used as needed. The positive electrode, the negative electrode of LED2 is connected to the positive electrode of LED3, and the LEDn and the like form a light string. The LEDs 4, 5, 5 and 6 of the light-emitting diodes are connected to the LEDn in the same way, and then form a light string, and then the two light strings are connected in reverse parallel. One lamp combination circuit, the number of LED lights is odd, the number of even numbers is not limited, but the number of two strings must be the same. The a end of the lamp group 1 to the a end of the lamp group 12 and the L-2 end of the high frequency inductor L1-L12 respectively. Connected, the aa end of the lamp set 1 is connected to the a_a end of the lamp set 12 and then connected to the N2-2 end of the secondary N2 of the high frequency transformer T. The lamp set can also be composed of one to more than twelve lamps as needed.

In the figure, the negative electrode of the LED1 is connected to the positive electrode of the LED2, the negative electrode of the LED2 is connected to the positive electrode of the LED3 to form a light string (one to n LEDs can be used as needed), and the LEDs LED4, LED5 and LED6 are connected in the same way to form a light string ( One to n LEDs can be used as needed) The two lamp strings are connected in reverse parallel to form a street lamp combination circuit. The a end of the lamp group 1 to the a end of the lamp group 12 is respectively connected to the L-2 end of the high frequency inductor L1-L12, and the aa end of the lamp group 1 is connected to the lamp group. The aa terminals of 12 are connected in common to the N2-2 terminal of the secondary N2 of the high frequency transformer T.

According to the combination of the circuit, in the example of the present invention, the output voltage is 12V, the LED light group of the LED is 3 lights, the string is a total of 2 strings, and the 12-way lamp combination is matched, and one to more than three lamps can be used according to the application requirements. String (odd, even number, but the number of two strings must be the same) Match one to more than twelve sets of lights. The lamp combination output power range of the invention is 2W-75W, which basically meets the requirement of driving less than 75W LED lamp. The maximum design output power of the invention is 150W, which basically meets the needs of driving high-power LED street lamps, tunnel lamps and floodlights. . Since the combined number of LED strings is small, even if the individual LEDs are defective or damaged during use, the illumination effect of the whole lamp is not affected, so the combined circuit of the matching lamp of the present invention has better fault tolerance.

Claims

The invention relates to a combination of a high-power LED street lamp driving power source and a matching lamp thereof, which comprises a driving power source and a lamp combination circuit (5), characterized in that the driving power source is a filter rectifier circuit (1) and a half-bridge inverter circuit ( 2), a constant power control circuit (3), an inductor current limiting circuit (4), an input terminal (6) of the filter rectifier circuit (1) is input with a power frequency of 220V AC; and the inductor current limiting circuit (4) comprises more than one The high frequency inductors are composed together. The lamp combination circuit (5) is composed of LEDs containing more than one channel. Each LED is composed of two strings of LED lamps. The two strings of LED lamps are connected in reverse parallel to form a street lamp combination circuit. Each string of LED lamps has more than one LED lamp. The high-power LEDs are connected in series; one end of the high-frequency inductor is connected in series to one end of the secondary N2 of the high-frequency transformer T, and the other end of the high-frequency inductor is respectively connected to the a-end of each of the LED groups; The aa terminals of the street light group are connected in common to the other end of the secondary N2 of the high frequency transformer T.

The combination of the high-power LED street lamp driving power source and the matching lamp thereof according to claim 1, wherein the filter rectifying circuit (1) comprises a fuse FU, a capacitor C0, C0a, Cl, C2, CY1, CY2. Differential mode inductance! ^, common mode inductor EMI, varistor VR, rectifier bridge stack BR together constitute a conventional filter rectifier circuit, in which the two ends of the capacitor C0, COa are connected to the input AC power L terminal, N terminal, capacitor Cl, through differential mode The inductor L and the fuse FU are respectively connected to the input AC power source, and the input AC power source passes through the common mode inductor EMI and the varistor VR, the capacitor C2, the pin BR1 of the rectifier bridge stack BR, the pin|foot BR2, the capacitor CY1, CY2— The terminals are connected, and the other ends of the capacitors CY1 and CY2 are connected to the ground PE. The pin BR2 of the rectifier bridge stack BR outputs the pulsating positive direct current (V+) and the bow BR4 outputs the negative direct current GND.

The combination of the high-power LED street lamp driving power source and the matching lamp thereof according to claim 1, wherein the half-bridge inverter circuit (2) comprises an integrated circuit U1, resistors R1, R2, R3, R4, R5, R6, R7, R8, R9, R13, R14, capacitors C3, C4, C5, C6, C7, C8, C9, C10, Cl1, C12, C13, CY3, CY4, diodes D1, D2 D3, D4, D5, D6, Zener diode DW, unidirectional thyristor SCR, FET Ql, Q2, high frequency transformer T are combined, wherein one end of resistor Rl, R2 is connected with positive DC (V+), resistor The other end of R1 passes through capacitor C3 and the negative terminal of Zener diode DW, the other end of resistor R passes through diode D1 and capacitor C4 positive terminal, C5, integrated circuit U1 pin U1-1, positive terminal of Zener diode DW, capacitor C4 negative electrode , C5, integrated circuit U1 pin U1-2 connected to GND to form the start circuit; R3, C6 in parallel, one end is connected with U1 pin U1-3, the other end is connected to GND to form a timing shutdown circuit; The silicon SCR, the diodes D5, D6, the resistors R7, R8, R9, the capacitors C7, CIO, C11 constitute a protection circuit, wherein the anode of the unidirectional thyristor SCR is connected to the integrated circuit U1 pin U1-1, the unidirectional thyristor The cathode of the SCR is connected to the GND, and the gate of the unidirectional thyristor SCR is connected to the integrated circuit U1 pin Ul-4, pin Ul-6 by diodes D5, D6, resistors R8, R7, R9, capacitors C7, C10, C11, respectively. , the S pole of the FET Q2 is connected; the resistors R4, R5, R6, R13, R14, field effect Tube Ql, Q2, capacitor C12, C13, high-frequency transformer T constitute the switch inverter output circuit, in which the integrated circuit Ul pin Ul-7, bow (foot U1-5 through the resistor R4, R5 and FET Ql, Q2 respectively The G pole is connected, the U1 pin U1-6 of the integrated circuit is connected to the D pole of the field effect transistor Q1, the D pole of the high frequency transformer T, the primary N1 end of the high frequency transformer T, the primary N2 end of the high frequency transformer T passes through the capacitors C12, C13, and the resistor R13 R14 is connected to positive DC (V+) and GND, D-pole of FET Q1 is connected to positive DC (V+), S-pole of FET Q2' is connected to GND through resistor R6, and resistor R7 is connected to pin U1 of Ul. -4; Capacitor C9, diode D3, D4 form a charge pump circuit, in which the primary N1 terminal of the high-frequency transformer T is connected to the anode of the diode D3 and the cathode of the D4 via the capacitor C9, the anode of the diode D3 is connected to the GND, and the anode of the D4 is connected to the integrated circuit U1. The foot U1-1; the diode D2, the capacitor C8 is a bootstrap boosting element, wherein the diode D2 is connected to the integrated circuit U1 pin Ul-1, the diode D2 is connected to the integrated circuit U1 pin Ul-8.

The high power LED street lamp driving power source and the combination lamp thereof according to claim 1, The characteristic is that the constant power control circuit is composed of a photocoupler U2, a precision three-terminal regulator U3, resistors R10, R11, R12, capacitors C14, C15, and a diode D7, wherein the anode of the diode D7 is connected to the high frequency transformer T. The N2-1 terminal of the secondary N2 and the negative terminal of the diode D7 pass through the resistors R10 and R11, and the voltage signal is filtered by the capacitor C15 as a sampling signal of the output power, respectively, through the resistors R10, R11, and the capacitor C15, respectively, to the photocoupler U2 pin U2- 1 and precision three-terminal regulator U3 pin R, capacitor C14, resistor R12 one end, capacitor C14, resistor R12 and the other end are connected to the precision three-terminal regulator U3 pin K:, optocoupler U2 pin U2-2 , three-terminal regulator U3 pin A, capacitor C15 negative, high-frequency transformer T secondary N2 N2-2 terminal, photocoupler U2 pin U2-3, pin U2-4 are connected to GND, integrated Circuit U1 pin U1- 4.

The combination of the high-power LED street lamp driving power source and the matching lamp thereof according to claim 1, wherein the inductor current limiting circuit (4) is composed of high-frequency inductors L1 to L12, wherein the high-frequency inductors L1 to L12 The L-1 terminals are connected in series to one end of the secondary N2 of the high frequency transformer T, and the L-2 terminals of the high frequency inductors L1 to L12 are respectively connected to the a terminals of the lamp groups of the LEDs.

The combination of the high-power LED street lamp driving power source and the matching lamp according to claim 1, wherein the lamp combination circuit (5) is composed of a high-power LEDs LED1 to LED6; wherein the LEDs of the LEDs are connected LED2 positive electrode, LED2 negative electrode connected to LED3 positive electrode, LEDs LED4, LED5, LED6 are connected in the same way and then form a light string, and then the two light strings are connected in reverse parallel to form a street light combination circuit, the light groups are respectively high The L-2 terminals of the frequency inductors L1 to L12 are connected, the aa terminals of the lamp group are connected in common, and then connected to the N2-2 terminal of the secondary N2 of the high frequency transformer T.