CN215734957U

CN215734957U - LED power supply with multi-loop output current controlled by AC input end

Info

Publication number: CN215734957U
Application number: CN202121698198.7U
Authority: CN
Inventors: 管德贵
Original assignee: Guangdong Baota Electronic Technology Co ltd
Current assignee: Guangdong Baota Electronic Technology Co ltd
Priority date: 2021-07-26
Filing date: 2021-07-26
Publication date: 2022-02-01
Anticipated expiration: 2031-07-26

Abstract

The utility model discloses an LED power supply for controlling multi-loop output current by an alternating current input end, which comprises a mains supply interface circuit, an electromagnetic filter PFC circuit, a rectifier filter circuit and a transformer isolation circuit, and also comprises an alternating current control signal detection processing and PWM output control circuit, a plurality of PWM dimming interfaces and a DC constant current circuit, wherein the alternating current control signal detection processing and PWM output control circuit is connected with the mains supply interface circuit, the output end of the transformer isolation circuit is connected with the DC rectifier filter circuit, and an LED load is connected between the output end of the DC rectifier filter circuit and the DC constant current circuit. The LED load driving circuit is reasonable in structural arrangement, is controlled from the alternating current input high-voltage end of a power supply, can adjust the current of an output loop without additionally adding an auxiliary control signal circuit, is favorable for reducing the cost, can drive a plurality of groups of LED loads by one power supply, greatly improves the use convenience, can independently adjust the current of each loop according to the requirement, and is strong in applicability and good in practicability.

Description

LED power supply with multi-loop output current controlled by AC input end

Technical Field

The utility model belongs to the technical field of LED lamp power supplies, and particularly relates to an LED power supply with a multi-loop output current controlled by an alternating current input end.

Background

Along with the maturity of LED lamps and lanterns technique, various LED lamps and lanterns develop rapidly, its drive of prior art's LED lamps and lanterns is single output mostly, and one drive can only drive LED lamp all the way, and it can satisfy the user demand of general condition, but when multichannel LED lamp, the multichannel drive that needs to correspond, its use cost that can greatly increased, it is fixed output circuit simultaneously, can not adjust, or adjust the electric current also can only be through pressing end auxiliary signal connection control, also can influence its application scope greatly, and suitability and practicality receive the restriction.

Disclosure of Invention

The utility model aims to provide an LED power supply which is reasonable in structure and arrangement and high in applicability and controls multi-loop output current through an alternating current input end.

The technical scheme for realizing the aim of the utility model is that the LED power supply for controlling the multi-loop output current by the alternating current input end comprises a mains supply interface circuit, an electromagnetic filter PFC circuit connected with the anode of the mains supply interface circuit, a rectification filter circuit connected with the electromagnetic filter PFC circuit, a transformer isolation circuit connected with the rectification filter circuit, an alternating current control signal detection processing and PWM output control circuit connected with the mains supply interface circuit, and a plurality of PWM dimming interfaces connected with the alternating current control signal detection processing and PWM output control circuit, wherein each PWM dimming interface is connected with a DC constant current circuit, the output end of the transformer isolation circuit is connected with a DC rectification filter circuit, and an LED load is connected between the output end of the DC rectification filter circuit and the DC constant current circuit.

And a voltage and current feedback circuit is connected to the DC rectifying and filtering circuit, and a PWM (pulse-width modulation) switch control circuit is fixed between the voltage and current feedback circuit and the transformer isolation circuit.

And a 5V power supply circuit is arranged between the alternating current control signal detection processing and PWM output control circuit and the DC rectification filter circuit.

The utility model has the positive effects that: the LED load driving circuit is reasonable in structural arrangement, is controlled from the alternating current input high-voltage end of a power supply, can adjust the current of an output loop without additionally adding an auxiliary control signal circuit, is favorable for reducing the cost, can drive a plurality of groups of LED loads by one power supply, greatly improves the use convenience, can independently adjust the current of each loop according to the requirement, and is strong in applicability and good in practicability.

Drawings

In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the present disclosure taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a block diagram of the present invention;

FIG. 2 is a schematic diagram of an embodiment of the present invention.

Detailed Description

(example 1)

FIGS. 1 and 2 show an embodiment of the present invention, wherein FIG. 1 is a block diagram of the present invention; FIG. 2 is a schematic diagram of an embodiment of the present invention.

Referring to fig. 1 and 2, an LED power supply with a multi-loop output current controlled by an ac input end includes a mains interface circuit 1, an electromagnetic filter PFC circuit 2 connected to an anode of the mains interface circuit 1, a rectifier filter circuit 3 connected to the electromagnetic filter PFC circuit 2, a transformer isolation circuit 4 connected to the rectifier filter circuit 3, an ac control signal detection processing and PWM output control circuit 5 connected to the mains interface circuit, and a plurality of PWM dimming interfaces 6 connected to the ac control signal detection processing and PWM output control circuit 5, each PWM dimming interface is connected to a DC constant current circuit 7, an output end of the transformer isolation circuit is connected to a DC rectifier filter circuit 8, and an LED load 9 is connected between an output end of the DC rectifier filter circuit and the DC constant current circuit. The LED load can be different lamps and lanterns, like projecting lamp, wall washer and dyeing lamps and lanterns, and it is more convenient reliable to use.

And a voltage and current feedback circuit 10 is connected to the DC rectifying and filtering circuit, and a PWM (pulse-width modulation) switch control circuit 11 is fixed between the voltage and current feedback circuit and the transformer isolation circuit. The voltage and current feedback circuit and the PWM switch control circuit are used for adjusting the transformer isolation circuit, so that the use stability and reliability are improved.

And a 5V power supply circuit 12 is arranged between the alternating current control signal detection processing and PWM output control circuit and the DC rectification filter circuit. The 5V power supply circuit is arranged to supply power for the alternating current control signal detection processing and PWM output control circuit, and an additional auxiliary control signal circuit is not needed, so that the cost is reduced.

The LED load driving circuit is reasonable in structural arrangement, is controlled from the alternating current input high-voltage end of a power supply, can adjust the current of an output loop without additionally adding an auxiliary control signal circuit, is favorable for reducing the cost, can drive a plurality of groups of LED loads by one power supply, greatly improves the use convenience, can independently adjust the current of each loop according to the requirement, and is strong in applicability and good in practicability.

The standard parts used in the present embodiment can be purchased directly from the market, and the non-standard structural parts described in the specification can also be obtained directly by processing according to the common general knowledge of the prior art without any doubt, and the connection mode of the parts adopts the conventional means matured in the prior art, and the machines, parts and equipment adopt the conventional models in the prior art, so that the detailed description is not given here.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And such obvious changes and modifications which fall within the spirit of the utility model are deemed to be covered by the present invention.

Claims

1. The utility model provides a LED power by exchange input control multiloop output current, includes commercial power interface circuit, with the electromagnetic filter PFC circuit that commercial power interface circuit's positive pole is connected, with the rectifier filter circuit that electromagnetic filter PFC circuit is connected and with the transformer isolation circuit that rectifier filter circuit is connected which characterized in that: the LED light modulation device is characterized by further comprising an alternating current control signal detection processing and PWM output control circuit connected with the mains supply interface circuit, and a plurality of PWM light modulation interfaces connected with the alternating current control signal detection processing and PWM output control circuit, wherein each PWM light modulation interface is connected with a DC constant current circuit, the output end of the transformer isolation circuit is connected with a DC rectification filter circuit, and an LED load is connected between the output end of the DC rectification filter circuit and the DC constant current circuit.

2. The LED power supply with multi-loop output current controlled by ac input terminal as claimed in claim 1, wherein: and a voltage and current feedback circuit is connected to the DC rectifying and filtering circuit, and a PWM (pulse-width modulation) switch control circuit is fixed between the voltage and current feedback circuit and the transformer isolation circuit.

3. The LED power supply with multi-loop output current controlled by ac input of claim 2, wherein: and a 5V power supply circuit is arranged between the alternating current control signal detection processing and PWM output control circuit and the DC rectification filter circuit.