CN214757009U - LED lamp multi-path different current output circuit - Google Patents

Abstract

The utility model discloses a LED lamp multichannel different current output circuit, including single chip microcomputer control circuit and pulse width modulator PWM, pulse width modulator PWM is connected with switch tube Q1 and switch tube Q2 respectively, switch tube Q1 is connected with input voltage line + VBULK, be connected with transformer T1 between switch tube Q1 and the switch tube Q2, be connected with transformer T2 on the transformer T1, transformer T2 includes winding T2A on the primary side, winding T2B and winding T2C on the secondary side, transformer T1 is connected with winding T2A, winding T2A is connected with electric capacity C1, winding T2B and winding T2C are connected with diode D1 and diode D2 respectively, the other end of diode D1 and diode D2 is connected with the positive pole of polar capacitance C2, polar capacitance C2 is connected with a plurality of street lamps, the single chip microcomputer control circuit is connected with drive control circuit, drive control circuit is connected with switch tube Q3 respectively, resistance R56, the other end of switch tube Q2 is connected with, the pulse width modulator PWM, switch tube Q2 is connected with the polar capacitance C1, The current limiting resistor R3, the switching tube Q4, the resistor R4, the current limiting resistor R5, the switching tube Q5, the resistor R6 and the current limiting resistor R7.

Description

LED lamp multi-path different current output circuit

Technical Field

The utility model belongs to the technical field of the different current output circuit of LED lamp multichannel, concretely relates to different current output circuit of LED lamp multichannel.

Background

The existing power driver has more single-path output and is connected with a plurality of lamp loads, a plurality of power drivers are needed, the cost of consumers can be increased, the problems are solved, a plurality of LED lamp multi-path different current output circuits are needed, different currents can be set for each output group, the LED lamp multi-path different current output circuit is suitable for loads with different currents, and the LED lamp multi-path different current output circuit can be connected with a plurality of lamp loads only through one power driver.

SUMMERY OF THE UTILITY MODEL

To the problem that the above-mentioned background art provided, the utility model aims at: the LED lamp is characterized in that a plurality of paths of different current output circuits of the LED lamp are provided.

In order to realize the technical purpose, the utility model discloses a technical scheme as follows:

a multi-path different current output circuit of an LED lamp comprises a single chip microcomputer control circuit and a pulse width modulator PWM, wherein the pulse width modulator PWM is respectively connected with a switching tube Q1 and a switching tube Q2, the switching tube Q1 is connected with a switching tube Q2, the switching tube Q1 is connected with an input voltage line + VBULK, the input voltage line + VBULK is connected with an external power supply, a transformer T1 is connected between the switching tube Q1 and the switching tube Q2, a transformer T2 is connected onto the transformer T1, the transformer T2 comprises a winding T2A at the primary side, a winding T2B and a winding T2C at the secondary side, the transformer T1 is connected with a winding T2A, a capacitor C1 is connected with the winding T2A, the capacitor C1 is connected with the switching tube Q1 and grounded, the winding T2 1 and the winding T2 1 are respectively connected with a diode D1 and a diode D1, and the other end of the polarity of the diode D1 is connected with the positive electrode C1, the polarity capacitor C2 has a negative electrode connected between a winding T2B and a winding T2C, the polarity capacitor C2 is connected with a total current-limiting resistor R1 and a current-voltage control circuit, the polarity capacitor C2 is connected with a plurality of LED street lamps, the impulse width modulator PWM is connected with an optocoupler U1, the optocoupler U1 is connected with the current-voltage control circuit, the singlechip control circuit is connected with a driving control circuit, the driving control circuit is respectively connected with a switching tube Q3, a resistor R2, a current-limiting resistor R3, a switching tube Q4, a resistor R4, a current-limiting resistor R5, a switching tube Q5, a resistor R6 and a current-limiting resistor R7, and the switching tube Q3, a resistor R2, a current-limiting resistor R3, a switching tube Q4, a resistor R4, a current-limiting resistor R5, a switching tube Q5, a resistor R6 and a current-limiting resistor R7 form a multi-path independent output circuit.

Further, the LED street lamps comprise a plurality of LED1, LED2, LED3 and the like.

The utility model has the advantages of it is following:

1. the utility model discloses a half-bridge circuit is constituteed with switch tube Q1 and switch tube Q2 to the modulator PWM of overshoot width. The circuit is simplified, the number of used devices is small, the power supply efficiency is high, and the cost is reduced;

2. the utility model discloses a single chip microcomputer control circuit is connected with the drive control circuit, controls the independent output of the different electric currents of multichannel respectively for only need a power driver output just can connect a plurality of lamps and lanterns loads, each way lamps and lanterns of output mutual noninterference, the practicality, the sexual valence relative altitude.

Drawings

The present invention can be further illustrated by the non-limiting examples given in the accompanying drawings;

fig. 1 is a schematic structural diagram of a multi-path different current output circuit of an LED lamp according to an embodiment of the present invention;

Detailed Description

In order to make the present invention better understood by those skilled in the art, the technical solutions of the present invention are further described below with reference to the accompanying drawings and examples.

As shown in fig. 1, the LED lamp of the present invention has a plurality of different current output lines, the pulse width modulator PWM is connected to a switching tube Q1 and a switching tube Q2, a switching tube Q1 is connected to a switching tube Q2, a switching tube Q1 is connected to an input voltage line + VBULK, the input voltage line + VBULK is connected to an external power source, a transformer T1 is connected between a switching tube Q1 and the switching tube Q2, a transformer T2 is connected to the transformer T1, the transformer T2 includes a primary winding T2 2, a secondary winding T2 2 and a winding T2 2, the transformer T2 is connected to the winding T2 2, the winding T2 2 is connected to a capacitor C2, the capacitor C2 is connected to the switching tube Q2 and grounded, the winding T2 2 and the winding T2 2 are connected to a diode D2 and a diode D2, the other end of the diode D2 is connected to a positive pole of the polar capacitor C2, the negative pole of the winding T2T 2 is connected to the winding T2 and the diode D2, the polarity capacitor C2 is connected with a total current-limiting resistor R1 and a current-voltage control circuit, the polarity capacitor C2 is connected with a plurality of LED street lamps, the pulse width modulator PWM is connected with an optocoupler U1, the optocoupler U1 is connected with the current-voltage control circuit, the singlechip control circuit is connected with a driving control circuit, the driving control circuit is respectively connected with a switching tube Q3, a resistor R2, a current-limiting resistor R3, a switching tube Q4, a resistor R4, a current-limiting resistor R5, a switching tube Q5, a resistor R6 and a current-limiting resistor R7, the switching tube Q3, a resistor R2, a current-limiting resistor R3, a switching tube Q4, a resistor R4, a current-limiting resistor R5, a switching tube Q5, a resistor R6 and a current-limiting resistor R7 to form a multi-path independent output circuit.

When the LED street lamp is used, the LED street lamp is fed back to the PWM control switch tube Q1 and the switch tube Q2 through the total current-limiting resistor R1 and the current-voltage control circuit through the U1, the output current is controlled, the voltage is output, the total output power is controlled, the singlechip control circuit detects a preposed dimming signal, the control driving control circuit is connected with the switch tube Q3, the resistor R2, the current-limiting resistor R3, the LED1 street lamp and the diode D3, the LED street lamp achieves the purposes of controlling the output current and the brightness of the LED1 street lamp through controlling the on-time of the switch tube Q3, the dimming is not flickering, and the operation is stable. The single chip microcomputer control circuit can output multiple street lamps, namely, the multiple output, and the principle is the same as that of the LED1 street lamp.

Preferably, the plurality of LED street lamps include a plurality of LED street lamps such as LED1, LED2, and LED 3.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims (2)

1. The utility model provides a LED lamp multichannel different current output circuit, includes single chip microcomputer control circuit and pulse width modulator PWM, its characterized in that: the pulse width modulator PWM is respectively connected with a switching tube Q1 and a switching tube Q2, the switching tube Q1 is connected with a switching tube Q2, the pulse width modulator PWM, a switching tube Q1 and a switching tube Q2 form a half-bridge circuit, the switching tube Q1 is connected with an input voltage line + VBULK, the input voltage line + VBULK is connected with an external power supply, a transformer T1 is connected between the switching tube Q1 and the switching tube Q2, a transformer T2 is connected to the transformer T1, the transformer T2 comprises a winding T2A at the primary side, a winding T2B at the secondary side and a winding T2C, the transformer T1 is connected with a winding T2A, the winding T2A is connected with a capacitor C1, the capacitor C1 is connected with the switching tube Q2 and grounded, the winding T2B and the winding T2C are respectively connected with a diode D1 and a diode D2, and a polarity capacitor C2 is connected to the other end of the diode D1 and the diode D2, the polarity capacitor C2 has a negative electrode connected between a winding T2B and a winding T2C, the polarity capacitor C2 is connected with a total current-limiting resistor R1 and a current-voltage control circuit, the polarity capacitor C2 is connected with a plurality of LED street lamps, the impulse width modulator PWM is connected with an optocoupler U1, the optocoupler U1 is connected with the current-voltage control circuit, the singlechip control circuit is connected with a driving control circuit, the driving control circuit is respectively connected with a switching tube Q3, a resistor R2, a current-limiting resistor R3, a switching tube Q4, a resistor R4, a current-limiting resistor R5, a switching tube Q5, a resistor R6 and a current-limiting resistor R7, and the switching tube Q3, a resistor R2, a current-limiting resistor R3, a switching tube Q4, a resistor R4, a current-limiting resistor R5, a switching tube Q5, a resistor R6 and a current-limiting resistor R7 form a multi-path independent output circuit.

2. The LED lamp multi-path different current output circuit of claim 1, wherein: the LED street lamps comprise a plurality of street lamps such as an LED1, an LED2 and an LED 3.

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