CN212211462U

CN212211462U - LED lamp driving power supply with multi-path output

Info

Publication number: CN212211462U
Application number: CN202021403380.0U
Authority: CN
Inventors: 江先华
Original assignee: Xiamen Jihe Exhibition System Engineering Co ltd; Xiamen Juguang Photoelectric Technology Co ltd
Current assignee: Xiamen Jihe Exhibition System Engineering Co ltd; Xiamen Juguang Photoelectric Technology Co ltd
Priority date: 2020-07-16
Filing date: 2020-07-16
Publication date: 2020-12-22
Anticipated expiration: 2030-07-16

Abstract

A LED lamp driving power supply with multi-path output comprises an EMC filter circuit, a bridge rectifier circuit, a detection control circuit and a constant current and constant voltage circuit; the constant-current constant-voltage circuits are in the same multi-path, and the multi-path constant-current constant-voltage circuits, the EMC filter circuit, the bridge rectifier circuit and the detection control circuit are arranged on a circuit board in the component box and are electrically connected with one another. The utility model discloses the same multichannel constant current constant voltage circuit has, multichannel constant current constant voltage circuit sharing not fragile EMC filter circuit, bridge rectifier circuit, detect control circuit, in operation, 5V constant current constant voltage power supply entering multichannel LED lamp power input end is exported respectively to multichannel constant current constant voltage circuit, in the practical application, even wherein all the way or multichannel constant current constant voltage circuit damage the back, other intact constant current constant voltage circuit can also normally be corresponding LED lamp power supply, the constant current constant voltage circuit has been prevented to only adopt all the way, will lead to the whole drawback of losing the electricity of all multichannel LED lamps after damaging. Based on the aforesaid, this is novel to have good prospect.

Description

LED lamp driving power supply with multi-path output

Technical Field

The utility model relates to a LED illumination power supply unit field, especially a LED lamp drive power supply with multiplexed output.

Background

The LED lamp is energy-saving, long in service life and very wide in application. Because the indoor power supply is generally alternating current 220V, and the general operating voltage of LED lamp pearl is direct current 3V, consequently need adopt driving power supply (switching power supply), step down the alternating current power supply, the rectification steady voltage is the LED lamp power supply.

At present, an existing LED lamp driving power supply is limited by a structure and only provided with one constant-current constant-voltage power supply output end, if a constant-current constant-voltage circuit part is damaged due to some reason (the constant-current constant-voltage circuit which is most prone to damage), the whole LED driving power supply cannot work, and then multiple paths or multiple LED lamps powered by the driving power supply lose power completely (for example, multiple outdoor LED lamp advertisement display screens are powered by one high-power LED driving power supply at the same time). Based on the above, it is especially necessary to provide a power supply for driving an LED lamp, which has one power input terminal and multiple power output terminals of a constant current and constant voltage circuit.

SUMMERY OF THE UTILITY MODEL

In order to overcome the limitation of the structure of the existing LED driving power supply, only one constant-current and constant-voltage power supply output end is provided, if the constant current and constant voltage circuit part is damaged for some reason, the whole LED driving power supply can not work, further, the multi-path or a plurality of LED lamps which are supplied with power by the driving power supply can be totally powered off, the utility model provides a multi-path constant current and constant voltage circuit which has the same structure, the multi-path constant current and constant voltage circuit shares an EMC filter circuit, a bridge rectifier circuit and a detection control circuit which are not easy to be damaged, when in work, the multi-path constant-current constant-voltage circuit respectively outputs a 5V constant-current constant-voltage power supply to enter the input end of the multi-path LED lamp power supply, even if one or more of the constant-current constant-voltage circuits are damaged, other intact constant-current constant-voltage circuits can normally supply power to corresponding LED lamps, and the LED lamp driving power supply with multi-path output, which can cause all the multi-path LED lamps to lose power after the damage of one or more of the constant-current constant-voltage circuits, is prevented.

The utility model provides a technical scheme that its technical problem adopted is:

a LED lamp driving power supply with multi-path output is characterized by comprising an EMC filter circuit, a bridge rectifier circuit, a detection control circuit and a constant current and constant voltage circuit; the constant-current constant-voltage circuits are in the same multi-path, and the multi-path constant-current constant-voltage circuits, the EMC filter circuit, the bridge rectifier circuit and the detection control circuit are arranged on a circuit board in the component box and are electrically connected with one another; the two power input ends of the EMC filter circuit are respectively connected with two poles of a 220V alternating current power supply, the two power output ends of the EMC filter circuit are respectively connected with the two power input ends of the bridge rectifier circuit, the two power output ends of the bridge rectifier circuit are respectively connected with the two power input ends of the detection control circuit, and the two power output ends of the detection control circuit are respectively connected with the two power input ends of the multi-path constant-current constant-voltage circuit; and the two ends of the power output of the multi-path constant-current constant-voltage circuit are electrically connected with the two ends of the power input of the multi-path LED lamp respectively.

Furthermore, the EMC filter circuit comprises a fuse, a common-mode inductor, a common-mode capacitor, a resistor, a common-mode magnetic ring and a non-polar capacitor, wherein the fuse, the common-mode inductor, the common-mode capacitor, the resistor, the common-mode magnetic ring and the non-polar capacitor are connected through circuit board wiring, one end of the fuse is connected with one end of the common-mode capacitor, one end of a first resistor and one end of a primary winding of the common-mode inductor, the other end of the common-mode capacitor is connected with one end of a second resistor and the other end of the primary winding of the common-mode inductor, the other end of the first resistor is.

Furthermore, the bridge rectifier circuit comprises a piezoresistor, an inductor, a resistor and a rectifier bridge stack which are connected through a circuit board in a wiring mode, one end of the piezoresistor is connected with one end of the resistor and one end of the inductor, the other end of the resistor is connected with the other end of the inductor and 2 pins of the rectifier bridge stack, the other end of the piezoresistor is connected with 3 pins of the rectifier bridge stack, and 4 pins of the rectifier bridge stack are grounded.

Furthermore, the detection control circuit comprises a PFC correction detection control integrated circuit with the model number SY5072, a resistor, a diode, a field effect transistor, a non-polar capacitor, an electrolytic capacitor and an inductor, wherein the PFC correction detection control integrated circuit, the resistor, the diode, the field effect transistor, the non-polar capacitor, the electrolytic capacitor and the inductor are connected through a circuit board in a wiring way, one end of a first non-polar capacitor is connected with one end of a second non-polar capacitor, one end of a first diode anode and one end of the inductor, the cathode of the first diode is connected with the other end of the second non-polar capacitor, the anode of the first electrolytic capacitor, one end of a third non-polar capacitor, the cathode of a second diode and one end of a first resistor, the other end of the inductor is connected with the anode of the second diode, one end of the second resistor and the drain electrode of the field effect transistor, the other end of the second resistor is connected with the other end of the third non, One end of a fifth resistor, one end of a sixth resistor, one end of an eighth resistor, a grid electrode of a field effect tube, a CS port 1 pin of a PFC correction detection control integrated circuit, one end of a seventh resistor and a source electrode of the field effect tube, the other end of the fourth resistor and a cathode of a third diode and a DRV port 6 pin of the PFC correction detection control integrated circuit, the other end of the first resistor and one end of a ninth resistor, the other end of the ninth resistor and one end of a tenth resistor and a FB port 4 pin of the PFC correction detection control integrated circuit, a VIN port 5 pin of the PFC correction detection control integrated circuit is connected with a positive electrode of a second electrolytic capacitor and one end of an eleventh resistor, a COMP port 3 pin of the PFC correction detection control integrated circuit is connected with one end of a twelfth resistor and one end of a fourth nonpolar capacitor, the other end of the twelfth resistor is connected with one end of the fifth nonpolar capacitor, the other end of the first nonpolar capacitor, the cathode of the first electrolytic capacitor, the other end of the sixth resistor, the other end of the seventh resistor, the other end of the eighth resistor, a GND port 1 pin of a PFC correction detection control integrated circuit, the other end of the fourth nonpolar capacitor, the other end of the fifth nonpolar capacitor, the other end of the tenth resistor and the cathode of the second electrolytic capacitor are grounded.

Furthermore, each path of constant current and voltage circuit comprises a constant current and constant voltage control integrated circuit with model OB3399, a transformer, a non-polar capacitor, a diode and an electrolytic capacitor which are connected through a circuit board, one end of a first resistor is connected with one end of the first non-polar capacitor, one end of a fourth resistor and one end of a primary first winding of the transformer, the other end of the first non-polar capacitor is connected with the other end of the fourth resistor and the cathode of the first diode, the other end of the first resistor is connected with the other end of a second resistor, the anode of the first diode is connected with the other end of the primary first winding of the transformer and two D ports 5 and 6 pins of the constant current and constant voltage control integrated circuit, the other end of the second resistor is connected with one end of a third resistor, the anode of the first electrolytic capacitor and a VCC port 3 pin of the constant current and constant voltage control integrated circuit, and the other end of the third resistor is connected with the cathode of, the other end of the sixth resistor is connected with the other end of the seventh resistor, a pin of a CS port 4 and a pin of a GND port 1 of the constant-current and constant-voltage control integrated circuit, the other end of the fifth resistor is connected with a pin of an FB port 2 and the other end of an eighth resistor of the constant-current and constant-voltage control integrated circuit, one end of a secondary winding of the transformer is connected with the anode of the third diode, the cathode of the third diode is connected with the anode of the second electrolytic capacitor and one end of a ninth resistor, and the other end of the secondary winding of the transformer is connected with the cathode of the second electrolytic capacitor and the other end of the ninth resistor.

The utility model has the advantages that: in this is novel, EMC filter circuit during operation reduces the inside ripple interference of 220V alternating current and filtering, exports bridge rectifier circuit again, makes follow-up circuit's drive accord with the requirement of national standard EMI (electromagnetic interference), prevents to cause the influence to follow-up circuit work to prevent to cause peripheral electrical apparatus work to receive the influence. When the bridge rectifier circuit works, 220V alternating current is rectified and then converted into about 300V pulsating direct current, and the pulsating direct current is output to the post-stage detection control circuit. The detection control circuit converts input pulsating direct current into pulsating direct current with higher power factor (more than or equal to 0.9) of about 400V to the multi-path constant-current constant-voltage circuit, the multi-path constant-current constant-voltage circuit converts the input pulsating direct current with about 400V into high-frequency alternating current of 50-100K, and the high-frequency alternating current is respectively output to two input ends of a power supply of the multi-path LED lamp after being subjected to voltage reduction by a transformer, resistance-capacitance filtering by an electrolytic capacitor, a resistor and the like, so that the multi-path LED lamp is in an electric light emitting state. The utility model discloses the same multichannel constant current constant voltage circuit has, multichannel constant current constant voltage circuit sharing not fragile EMC filter circuit, bridge rectifier circuit, detect control circuit, in operation, 3V constant current constant voltage power supply entering multichannel LED lamp power input end is exported respectively to multichannel constant current constant voltage circuit, in the practical application, even wherein all the way or multichannel constant current constant voltage circuit damage the back, other intact constant current constant voltage circuit can also normally be corresponding LED lamp power supply, the constant current constant voltage circuit has been prevented to only adopt all the way, will lead to the whole drawback of losing the electricity of all multichannel LED lamps after damaging. Based on the above, so this novel application prospect that has.

Drawings

Fig. 1 is a block diagram illustration of the present invention.

Fig. 2 is the utility model discloses EMC filter circuit, bridge rectifier circuit, detection control circuit and wherein the constant current constant voltage circuit diagram of the same kind.

Detailed Description

As shown in fig. 1, an LED lamp driving power supply with multiple outputs includes an EMC filter circuit, a bridge rectifier circuit, a detection control circuit, and a constant current and voltage circuit; the constant current and constant voltage circuit comprises seven identical circuits, and the seven constant current and constant voltage circuits, the EMC filter circuit, the bridge rectifier circuit and the detection control circuit are arranged on a circuit board in the component box and are connected through leads.

As shown in fig. 2, the EMC filter circuit includes a fuse F1, a common mode inductor LF1, a common mode capacitor CX1, resistors R21, R22, a common mode magnetic ring LF2, and a nonpolar capacitor CBB2, which are connected through circuit board wiring, one end of the fuse F1 is connected to one end of the common mode capacitor CX1, one end of the first resistor R21, one end of the primary winding of the common mode inductor LF1, the other end of the common mode capacitor CX1 is connected to one end of the second resistor R22, and the other end of the primary winding of the common mode inductor LF1, the other end of the first resistor R21 is connected to the other end of the second resistor R22, and two ends of the secondary winding of the common mode inductor LF1 are connected to two ends of the nonpolar capacitor CBB2 and two ends of the. The bridge rectifier circuit comprises a piezoresistor RV1, an inductor L3, a resistor R28 and a rectifier bridge stack BD1 which are connected through circuit board wiring, one end of the piezoresistor RV1 is connected with one end of the resistor R28 and one end of the inductor L3, the other end of the resistor R28 is connected with the other end of the inductor L3 and a pin 2 of the rectifier bridge stack BD1, the other end of the piezoresistor RV1 is connected with a pin 3 of the rectifier bridge stack BD1, and a pin 4 of the rectifier bridge stack BD1 is grounded. The detection control circuit comprises a PFC correction detection control integrated circuit U1 of a model SY5072, resistors R1, R16, R5, R27, R12, R13, R14, R15, R2, R11 and R3, diodes D2, D24 and D1, a field effect transistor Q1, nonpolar capacitors C10, C2, C3, C12 and C5, electrolytic capacitors CE9 and CE15 and an inductor L2 which are connected through circuit board wiring; one end of a first nonpolar capacitor C10 is connected with one end of a second nonpolar capacitor C2, the anode of a first diode D2 and one end of an inductor L2, the cathode of the first diode D2 is connected with the other end of the second nonpolar capacitor C2, the anode of a first electrolytic capacitor CE9, one end of a third nonpolar capacitor C3, the cathode of a second diode D24 and one end of a first resistor R1, the other end of the inductor L2 is connected with the anode of a second diode D24, one end of a second resistor R16 and the drain of a field effect transistor Q1, the other end of the second resistor R16 is connected with the other end of the third nonpolar capacitor C3, the anode of the third diode D1 is connected with one end of a third resistor R5, the other end of the third resistor R5 is connected with one end of a fourth resistor R27, one end of a fifth resistor R12, one end of a sixth resistor R13, one end of an eighth resistor R6867, one end of a second resistor R87458 and a PFC control pin 1 of a PFC control circuit, one end of a seventh resistor R14 is connected with a source electrode of a field effect transistor Q1, the other end of a fourth resistor R27 is connected with a cathode of a third diode D1 and a pin 6 of a DRV port of a PFC correction detection control integrated circuit U1, the other end of a first resistor R1 is connected with one end of a ninth resistor R2, the other end of the ninth resistor R2 is connected with one end of a tenth resistor R11 and a pin 4 of an FB port of a PFC correction detection control integrated circuit U1, a pin 5 of a VIN port of the PFC correction detection control integrated circuit U1 is connected with an anode of a second electrolytic capacitor CE15 and one end of an eleventh resistor R3, a pin 3 of a COMP port of the PFC correction detection control integrated circuit U1 is connected with one end of a twelfth resistor R20 and one end of a fourth nonpolar capacitor C12, the other end of the twelfth resistor R20 is connected with one end of a fifth nonpolar capacitor C5, the other end of the first nonpolar capacitor C10 is connected with the cathode of the first electrolytic capacitor C9 and the sixth resistor R13, The other end of the seventh resistor R14, the other end of the eighth resistor R15, the GND port 1 pin of the PFC correction detection control integrated circuit U1, the other end of the fourth nonpolar capacitor C12, the other end of the fifth nonpolar capacitor C5, the other end of the tenth resistor R11 and the negative electrode of the second electrolytic capacitor CE15 are grounded.

As shown in fig. 2, the constant-current constant-voltage circuit includes a constant-current constant-voltage control integrated circuit U2 of model OB3399, a transformer T1, a nonpolar capacitor C1, diodes D4, D5, D3, electrolytic capacitors CE14, CE1, resistors R18, R19, R63, R33, R25, R51, R52, R24, R26, which are wired via a circuit board; one end of a first resistor R18 is connected with one end of a first nonpolar capacitor C1, one end of a fourth resistor R33 and one end of a primary first winding of a transformer T1, the other end of the first nonpolar capacitor C1 is connected with the other end of a fourth resistor R33 and the cathode of a first diode D4, the other end of a first resistor R18 is connected with the other end of a second resistor R19, the anode of a first diode D4 is connected with the other end of the primary first winding of the transformer T1, two D ports 5 and 6 of a constant current and constant voltage control integrated circuit U2, the other end of a second resistor R19 is connected with one end of a third resistor R63, the anode of a first electrolytic capacitor CE1, the VCC port 3 of a constant current and constant voltage control integrated circuit U2, the other end of the third resistor R63 is connected with a second diode D3, the anode of a second diode D3 is connected with one end of a fifth resistor R25, the first winding T1 is connected with the cathode of a first primary winding of the transformer T1, and the cathode of the primary capacitor CE 38 are connected with the cathode of the electrolytic capacitor CE1, One end of a sixth resistor R51, one end of a seventh resistor R52 and one end of an eighth resistor R24 are connected, the other end of the sixth resistor R51 is connected with the other end of the seventh resistor R52, the CS port 4 pin and the GND port 1 pin of the constant-current constant-voltage control integrated circuit U2, the other end of the fifth resistor R25 is connected with the FB port 2 pin of the constant-current constant-voltage control integrated circuit U2 and the other end of the eighth resistor R24, one end of a secondary winding of a transformer T1 is connected with the anode of a third diode D5, the cathode of the third diode D5 is connected with the anode of a second electrolytic capacitor D5 and one end of a ninth resistor R26, and the other end of a secondary T1 winding of the transformer is connected with the cathode of a second electrolytic capacitor CE14 and the other end of a ninth resistor R26.

As shown in fig. 2, the other end of a fuse F1 at two power input ends of an EMC filter circuit, one end of a common mode inductor LF1 and two poles of a 220V ac power supply are respectively connected by leads, two ends of a common mode magnetic ring LF2 at two power output ends of the EMC filter circuit and two ends of a varistor RV1 at two power input ends of a bridge rectifier circuit are respectively connected by leads, pins 1 and 4 of a rectifier bridge stack BD1 at two power output ends of the bridge rectifier circuit and the positive electrode of a diode D2 at two power input ends of a detection control circuit and the other end of a nonpolar capacitor C10 are respectively connected by leads, one end of a resistor R1 and the other end of a resistor R3 at two power output ends of the detection control circuit and one end of a resistor R18 and the other end of a resistor R63 at two power; and the anode and the cathode of the electrolytic capacitor CE14 at the two ends of the power output of the seven-path constant-current constant-voltage circuit are respectively connected with the LED + and the LED-at the two ends of the power input of the seven-path LED lamp through leads.

As shown in fig. 1 and 2, when the EMC filter circuit works, a primary filter composed of a common-mode inductor LF1, a common-mode capacitor CX1, a resistor R21, and a resistor R22 primarily filters power supply noise waves from a 220V ac power supply (a fuse F1 plays a role in protecting), and then the filtered power supply enters a diode filter composed of a common-mode magnetic ring LF2 and a nonpolar capacitor CBB2 through a common-mode inductor LF1 to be filtered again, so that internal interference of the 220V ac power supply is sufficiently reduced or filtered, and then the filtered power supply is output to a bridge rectifier circuit through a secondary winding of the common-mode magnetic ring LF2, so that the driving of a subsequent circuit meets the requirement of national standard (electromagnetic interference), the subsequent circuit is prevented from being affected by EMI, and the peripheral electric appliance is prevented from being affected. When the bridge rectifier circuit works when power is supplied, a filtered 220V alternating current power supply is rectified into about 300V pulsating direct current through a rectifier bridge stack BD1, and the rectifier bridge stack BD1 outputs power to two power supply input ends of the rear-stage detection control circuit through pins 1 and 4. After the detection control circuit works when power is supplied, under the combined action of a non-polar capacitor C10, a capacitor C2 (filtering) and a diode D2 (clamping), the input 300V pulsating direct current enters a boost inductor L2 and a boost diode D24, then the voltage is increased to about 400V, and then the input 300V pulsating direct current enters a pin 4 of a PFC correction drive integrated circuit U1 through resistors R1 and R2 (voltage reduction and current limitation); the resistors R1 and R2 form a voltage feedback circuit, the feedback voltage enters the 4 pins of the PFC correction driving integrated circuit U1, the voltage output by the 6 pins is reduced when the input voltage of the PFC correction driving integrated circuit U1 is too high, and the voltage output by the 6 pins is increased when the input voltage is too low, namely, the stable voltage is output to the grid electrode of the field effect tube Q1, and the output voltage of the seven-circuit constant-current constant-voltage circuit at the rear stage is stable. In the detection control circuit, after an output current feedback circuit composed of resistors R14 and R15 and an output current enter a pin 1 of a current feedback input end CS port of a PFC correction drive integrated circuit U1, the PFC correction drive integrated circuit U1 is ensured to reduce the current output by a pin 6 when the output current of a subsequent field effect transistor Q1 is overhigh, and the current output by the pin 6 is increased when the output voltage is overlow, namely the stable current is ensured to be output to the field effect transistor Q1, and the output current of a post-stage seven-path constant current and constant voltage circuit is ensured to be stable. In the detection control circuit, resistors R20 and R11 and nonpolar capacitors C12 and C5 are peripheral elements of a PFC correction drive integrated circuit U1 and play a role of resistance-capacitance filtering; after the PFC correction driving integrated circuit U1 is powered on to work, 6-pin output current enters the grid of a field-effect tube Q1, the field-effect tube Q1 is clamped by a peripheral element D1, resistors R5, R5 and R27 (shunt) and a resistor R14 (step-down current limiting) jointly, a drain electrode of the field-effect tube Q1 (a diode D24 clamps, a resistor R16 and a nonpolar capacitor C3 play a role in resistance-capacitance filtering) can output a 400V direct-current power supply with a high power factor (not less than 0.9) to enter an anode power supply input end of the seven-circuit constant-current and constant-voltage circuit, and then the seven-circuit constant-current and constant-voltage circuit is in a powered working state. In the detection control circuit, a resistor R3 and an electrolytic capacitor CE15 (filter) mainly play a role in feeding back voltage, when the output voltage of a rear-stage seven-path constant-current constant-voltage circuit is too high, and the voltage fed back by a primary secondary winding of a transformer T1 is too high, a pin 6 of a PFC correction driving integrated circuit U1 can reduce the output of a voltage signal, when the output voltage of the rear-stage seven-path constant-current constant-voltage circuit is too low, and when the voltage fed back by a primary secondary winding of the transformer T1 is too low, the pin 6 of the PFC correction driving integrated circuit U1 can improve the output of the voltage signal.

As shown in fig. 1 and 2, after the seven constant-current and constant-voltage circuits are powered, the constant-current and constant-voltage control integrated circuit U2 has a non-polar capacitor C1, diodes D5 and D3, resistors R18 and R19, under the combined action of R63 and R33, input pulsating direct current of about 400V is converted into high-frequency alternating current of 50-100K, and the high-frequency alternating current enters a power input end (two ends of a primary first winding) of a transformer T1, so that a 5V alternating current power output by a secondary winding of the transformer T1 outputs stable constant-current constant-voltage 5V power to enter power input ends of seven LED lamps respectively under the rectifying action of a diode D5 and the resistance-capacitance filtering action of an electrolytic capacitor CE14 and a resistor R26, and then the seven LED lamps are in a power-on light-emitting state (the voltage and the current of the input power of the LED lamps are accurately controlled, the LED lamps work under a high power factor is well realized, and no 100HZ stroboflash is simultaneously achieved). After the seven constant-current and constant-voltage circuits are powered on, alternating current generated by a secondary winding (few winding turns) of a primary side of the transformer T1 is divided by resistors R25 and R24 and enters a pin 4 of the constant-current and constant-voltage control integrated circuit U2, after feedback voltage is input to the pin 4 of the constant-current and constant-voltage control integrated circuit U2, if the feedback voltage is too high, an input power supply of the primary side of the transformer T1 is reduced, and if the feedback voltage is too high, an input power supply of a primary side of the transformer T1 is increased, so that stability of power supplies (voltage and current) output by a secondary winding of the transformer T1 is ensured. The utility model discloses seven identical constant current constant voltage circuit have, seven constant current constant voltage circuit sharing not fragile EMC filter circuit, bridge rectifier circuit, detect control circuit, in operation, seven constant current constant voltage circuit export constant current constant voltage power supply respectively and get into seven LED lamps jointly, in the practical application, even wherein all the way or the damage back of multichannel constant current constant voltage circuit, other intact constant current constant voltage circuit can also normally be corresponding LED lamp power supply, the constant current constant voltage circuit has been prevented to only adopt all the way, will lead to the whole drawback of losing the electricity of all multichannel LED lamps after damaging. The types and specifications of the components in the novel circuit are labeled, and are not described herein again.

The basic principles and essential features of the invention and the advantages of the invention have been shown and described above, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but rather can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Furthermore, it should be understood that although the present description refers to embodiments, the embodiments do not include only one independent technical solution, and such description is only for clarity, and those skilled in the art should take the description as a whole, and the technical solutions in the embodiments may be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A LED lamp driving power supply with multi-path output is characterized by comprising an EMC filter circuit, a bridge rectifier circuit, a detection control circuit and a constant current and constant voltage circuit; the constant-current constant-voltage circuits are in the same multi-path, and the multi-path constant-current constant-voltage circuits, the EMC filter circuit, the bridge rectifier circuit and the detection control circuit are arranged on a circuit board in the component box and are electrically connected with one another; the two power input ends of the EMC filter circuit are respectively connected with two poles of a 220V alternating current power supply, the two power output ends of the EMC filter circuit are respectively connected with the two power input ends of the bridge rectifier circuit, the two power output ends of the bridge rectifier circuit are respectively connected with the two power input ends of the detection control circuit, and the two power output ends of the detection control circuit are respectively connected with the two power input ends of the multi-path constant-current constant-voltage circuit; and the two ends of the power output of the multi-path constant-current constant-voltage circuit are electrically connected with the two ends of the power input of the multi-path LED lamp respectively.

2. The LED lamp driving power supply according to claim 1, wherein the EMC filter circuit includes a fuse, a common mode inductor, a common mode capacitor, a resistor, a common mode magnetic ring, and a non-polar capacitor, which are connected via circuit board wiring, one end of the fuse is connected to one end of the common mode capacitor, one end of the first resistor, one end of the primary winding of the common mode inductor, the other end of the common mode capacitor is connected to one end of the second resistor, and the other end of the primary winding of the common mode inductor, the other end of the first resistor is connected to the other end of the second resistor, and both ends of the secondary winding of the common mode inductor are connected to both ends of the non-polar capacitor and both ends of the primary winding of.

3. The LED lamp driving power supply according to claim 1, wherein the bridge rectifier circuit comprises a varistor, an inductor, a resistor, and a bridge rectifier, which are connected by wiring on the circuit board, one end of the varistor is connected to one end of the resistor and one end of the inductor, the other end of the resistor is connected to the other end of the inductor and 2 pins of the bridge rectifier, the other end of the varistor is connected to 3 pins of the bridge rectifier, and 4 pins of the bridge rectifier are grounded.

4. The LED lamp driving power supply of claim 1, wherein the detection control circuit comprises a PFC correction detection control integrated circuit of type SY5072, a resistor, a diode, a field effect transistor, a non-polar capacitor, an electrolytic capacitor, and an inductor, which are connected by wiring on a circuit board, wherein one end of the first non-polar capacitor is connected to one end of the second non-polar capacitor, the anode of the first diode, and one end of the inductor, the cathode of the first diode is connected to the other end of the second non-polar capacitor, the anode of the first electrolytic capacitor, one end of the third non-polar capacitor, the cathode of the second diode, one end of the first resistor, the other end of the inductor is connected to the anode of the second diode, one end of the second resistor, and the drain of the field effect transistor, the other end of the second resistor is connected to the other end of the third non-polar capacitor, and the anode of the third diode is connected to one end of the third resistor, the other end of the third resistor is connected with one end of a fourth resistor, one end of a fifth resistor, one end of a sixth resistor, one end of an eighth resistor, a grid electrode of a field effect tube and a CS port 1 pin of a PFC correction detection control integrated circuit, one end of a seventh resistor is connected with a source electrode of the field effect tube, the other end of the fourth resistor is connected with a cathode of a third diode and a DRV port 6 pin of the PFC correction detection control integrated circuit, the other end of the first resistor is connected with one end of a ninth resistor, the other end of the ninth resistor is connected with one end of a tenth resistor and a FB port 4 pin of the PFC correction detection control integrated circuit, a VIN port 5 pin of the PFC correction detection control integrated circuit is connected with an anode of a second electrolytic capacitor and one end of an eleventh resistor, a COMP port 3 pin of the PFC correction detection control integrated circuit is connected with one end of a twelfth resistor and one end of a fourth nonpolar capacitor, the other end of the twelfth resistor is connected with one end of the fifth nonpolar capacitor, the other end of the first nonpolar capacitor is connected with the cathode of the first electrolytic capacitor, the other end of the sixth resistor, the other end of the seventh resistor, the other end of the eighth resistor, the GND port 1 pin of the PFC correction detection control integrated circuit, the other end of the fourth nonpolar capacitor, the other end of the fifth nonpolar capacitor, the other end of the tenth resistor and the cathode of the second electrolytic capacitor are grounded.

5. The LED lamp driving power supply according to claim 1, wherein each of the constant current and voltage circuits comprises a constant current and voltage control IC of type OB3399, a transformer, a non-polar capacitor, a diode, and an electrolytic capacitor, which are connected via wiring on a circuit board, wherein one end of a first resistor is connected to one end of the first non-polar capacitor, one end of a fourth resistor, and one end of a primary first winding of the transformer, the other end of the first non-polar capacitor is connected to the other end of the fourth resistor, and a cathode of the first diode, the other end of the first resistor is connected to the other end of a second resistor, an anode of the first diode is connected to the other end of the primary first winding of the transformer, two D ports 5 and 6 of the constant current and voltage control IC, the other end of the second resistor is connected to one end of the third resistor, an anode of the first electrolytic capacitor, and a pin 3 of a VCC port of the constant current and voltage control IC, the other end of the third resistor is connected with the cathode of the second diode, the anode of the second diode is connected with one end of the fifth resistor and one end of the second primary winding of the transformer, the other end of the second primary winding of the transformer is connected with the cathode of the first electrolytic capacitor, one end of the sixth resistor, one end of the seventh resistor and one end of the eighth resistor, the other end of the sixth resistor is connected with the other end of the seventh resistor, the other end of the fifth resistor is connected with the FB port 2 pin and the eighth resistor, one end of a secondary winding of the transformer is connected with the anode of a third diode, the cathode of the third diode is connected with the anode of a second electrolytic capacitor and one end of a ninth resistor, and the other end of the secondary winding of the transformer is connected with the cathode of the second electrolytic capacitor and the other end of the ninth resistor.