CN219938566U

CN219938566U - LED drive circuit compatible with two dimming modes simultaneously

Info

Publication number: CN219938566U
Application number: CN202321163198.6U
Authority: CN
Inventors: 邢玮; 程雅文
Original assignee: Guyuan Photoelectric Technology Shanghai Co ltd
Current assignee: Guyuan Photoelectric Technology Shanghai Co ltd
Priority date: 2023-05-15
Filing date: 2023-05-15
Publication date: 2023-10-31
Anticipated expiration: 2033-05-15

Abstract

In order to solve different demands of the market on the LED lamp, the utility model provides an LED driving circuit compatible with two dimming types, which comprises a 0-10V dimmer and a silicon controlled rectifier dimmer, wherein the 0-10V dimmer is connected with a PWM chip, the PWM chip is connected with a constant current source chip through an optocoupler isolation circuit, and the current source chip is connected with the LED through a MOS switch tube, an output transformer and a rectifying tube to implement 0-10V dimming, or the silicon controlled rectifier dimmer is adopted to be connected with an input line, and the silicon controlled rectifier dimming is implemented through C1 and R1 in the constant current source chip. The utility model has the advantages that the LED driving circuit compatible with two dimming types can implement the 0-10VLED dimming and the silicon controlled rectifier dimming by adopting the silicon controlled rectifier dimmer, thereby meeting the market demand, reducing the product types and lowering the inventory management cost.

Description

LED drive circuit compatible with two dimming modes simultaneously

Technical Field

The utility model relates to an LED power supply circuit, in particular to a power supply circuit for LED driving dimming.

Background

In the existing LED driving power supply, the common LED driving dimming modes comprise silicon controlled rectifier dimming, 0-10V dimming and the like, but most dimming products in the market can only realize one dimming mode. And then, at the practical application end, different products are required, the types of the products are various, and the inventory management cost is increased.

Disclosure of Invention

In order to solve different demands of the market on LED lamps, the utility model provides an LED driving circuit compatible with two dimming types simultaneously, which comprises a 0-10V dimmer and a silicon controlled rectifier dimmer, and is characterized in that the 0-10V dimmer is connected with a PWM chip, the PWM chip is connected with a constant current source chip through an optocoupler isolation circuit, the current source chip is connected with an LED through a MOS switch tube, an output transformer and a rectifying tube, 0-10V dimming is implemented, the silicon controlled rectifier dimmer is adopted, an input line is connected, and the silicon controlled rectifier dimming is implemented through C1 and R1 in the constant current source chip.

The constant current source chip is provided with a silicon controlled rectifier dimming function.

The utility model has the advantages that the LED driving circuit compatible with two dimming types can implement the 0-10VLED dimming and the silicon controlled rectifier dimming by adopting the silicon controlled rectifier dimmer, thereby meeting the market demand, reducing the product types and lowering the inventory management cost.

Drawings

FIG. 1 is a circuit block diagram of the present utility model;

FIG. 2 is a schematic circuit diagram of FIG. 1;

reference numerals in the drawings illustrate;

1-alternating current input; 2-rectifying and filtering; 3-a constant current source circuit chip; 4-an optocoupler; a 5-PWM chip; 6-LED load.

Detailed Description

The utility model can be compatible with two dimming LED driving circuits, namely a 0-10V dimming driving circuit and a silicon controlled dimming driving circuit.

0-10V dimming driving circuit:

referring to fig. 2, the PWM IC is GP9301B and the constant current chip IC is MPS4056. The 0-10V dimmer signal is connected into PWM IC GP9301B through dim+ and dim-, 0-10V analog voltage signal is converted into PWM pulse signal through the chip interior, PWM A pin outputs pulse modulation signal, PWM pulse modulation signal is transferred to NTC pin of constant current chip IC MPS4056 through optocoupler isolation circuit 4, constant current chip IC MPS4056 is connected with LED through MOS switch tube Q1, output transformer T4, rectifying tube D6, implementing 0-10V dimming,

the silicon controlled rectifier dimming driving circuit comprises:

referring to fig. 2, the constant current chip IC is MPS4056, and the chip supports the thyristor dimming, and the thyristor dimmer F1 is connected to the input line L, N, so that the input thyristor dimming can be realized through C1 and R1 in the constant current circuit, Q1, the transformer T4, and the rectifier tube D6.

Claims

1. The utility model provides a compatible two kinds of LED drive circuit that adjust luminance simultaneously, includes 0-10V light modulator, silicon controlled rectifier light modulator, its characterized in that, 0-10V light modulator connects the PWM chip, and the PWM chip passes through opto-coupler isolation circuit and connects the constant current source chip, and the current source chip passes through MOS switch tube, output transformer, rectifier tube, connects the LED, implements 0-10V light modulation, adopts silicon controlled rectifier light modulator, inserts the input line, implements silicon controlled rectifier light modulation through C1, the R1 in the constant current source chip.

2. The LED driver circuit of claim 1, wherein said constant current source chip is a constant current source chip with a thyristor dimming function.