LED driving power supply with power supply switching function

Abstract

The utility model discloses an LED driving power supply with a power supply switching function, the power supply is provided with more than two driving power supply circuits, isolation driving modules in the driving power supply circuits are externally provided with detection ends and enabling ends, and a control module detects electrical parameters and ripple parameters of the driving power supply circuits through the detection ends of the driving power supply circuits. If it is detected that the operation condition of the driving power supply circuit does not meet the requirement, the corresponding driving power supply circuit is controlled to be closed through the configured enabling end, and other driving power supply circuits are controlled to be started, so that the switching function of the driving power supply circuits is achieved, and the service life of each driving power supply circuit is effectively prolonged; and the ripple parameter is effectively reduced in the power-on process of each driving power supply circuit.

Description

Technical Field

[0001] This utility model relates to the field of electronic circuit technology, and more specifically to an LED driver power supply with power supply switching function. Background Technology

[0002] Currently, LED light source products occupy a large share of the lighting market, leading to their widespread application in various everyday situations. However, in practical applications, some locations require sufficient brightness 24 hours a day. Prolonged operation of LED light sources increases the likelihood of damage to their internal driver power supplies. This is because prolonged operation keeps the components of the LED driver power supply at high temperatures, resulting in increased current ripple and reduced component lifespan. Utility Model Content

[0003] To solve the above-mentioned technical problems, the purpose of this utility model is to provide an LED driver power supply with power supply switching function.

[0004] The technical solution adopted by this utility model to solve the problem is:

[0005] An LED driver power supply with power supply switching function includes an AC power input port, a light source output port, a driver power supply circuit, and a control module. The driver power supply circuit is configured with two or more components, and the driver power supply circuit includes a rectifier filter module, an isolation driver module, and an output filter module.

[0006] The mains input port is connected to the rectifier and filter module in each of the driving power circuits. In the driving power circuit, the rectifier and filter module is connected to the isolation driving module, the isolation driving module is connected to the output filter module, and the output filter module in each of the driving power circuits is connected to the light source output port.

[0007] The isolation drive module is provided with a detection terminal for monitoring its electrical parameters and an enable terminal for controlling its start-up and shutdown. The detection terminal and the enable terminal of the isolation drive module are respectively connected to the control module.

[0008] As a further improvement to the above technical solution, the isolation drive module includes an isolation transformer LA, the isolation transformer is equipped with a detection winding LA1, one end of the detection winding LA1 is connected to the ground, and the other end of the detection winding LA1 serves as the detection terminal of the isolation drive module.

[0009] As a further improvement to the above technical solution, the isolation drive module includes a switching power supply chip, the switching power supply chip is configured with a sampling terminal, and the sampling terminal of the switching power supply chip serves as the enable terminal of the isolation drive module.

[0010] As a further improvement to the above technical solution, the isolation drive module includes a switch Q1, resistors R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, capacitors C1, C2, C3, C4, C5, diodes D1, D2, and D3, the switching power supply chip is also configured with a power supply terminal, a drive terminal, and a feedback terminal, and the isolation transformer LA is also configured with an input winding LA2 and a feedback winding LA3.

[0011] The driving terminal of the switching power supply chip is connected to the gate of the switching transistor Q1 through resistor R1. The gate of the switching transistor Q1 is connected to the anode of the diode D1 through resistor R5. The cathode of the diode D1 is connected to the driving terminal of the switching power supply chip. The gate of the switching transistor Q1 is connected to ground through resistors R2 and R3. One end of resistor R4 is connected to the junction of resistors R2 and R3, and the other end of resistor R4 is connected to ground through capacitor C1. The sampling terminal of the switching power supply chip is connected to the junction of resistor R4 and capacitor C1. The source of the switching transistor Q1 is connected to the junction of resistors R2 and R3. The drain of the switching transistor Q1 is connected to one end of the input winding LA2 and one end of resistor R6. The other end of the input winding LA2 is connected to ground through capacitor C3. The other end of resistor R6 is connected to the diode D1. The positive terminal of diode D2 is connected to the ground. The negative terminal of diode D2 is connected to the rectifier and filter module through resistor R7. One end of capacitor C2 is connected to the negative terminal of diode D2. The other end of capacitor C2 is connected to the connection point of resistor R7 and the rectifier and filter module, and also to the connection point of input winding LA2 and capacitor C3. One end of feedback winding LA3 is connected to ground. The other end of feedback winding LA3 is connected to one end of resistor R8 and one end of resistor R9. The other end of resistor R8 is connected to ground through resistor R10. Capacitor C5 is connected in parallel with resistor R10. The feedback terminal of the switching power supply chip is connected to the connection point of resistor R8 and resistor R10. The other end of resistor R9 is connected to the positive terminal of diode D3. The negative terminal of diode D3 is connected to ground through capacitor C4. The power supply terminal of the switching power supply chip is connected to the negative terminal of diode D3.

[0012] As a further improvement to the above technical solution, the output filtering module also includes resistors R11 and R12, capacitors C6 and C7, and diode D4; the isolation transformer LA also includes an output winding LA4.

[0013] One end of the output winding LA4 is connected to ground, and the other end of the output winding LA4 is connected to one end of the capacitor C6 and the positive terminal of the diode D4. The other end of the capacitor C6 is connected to the negative terminal of the diode D4 through the resistor R11. The negative terminal of the diode D4 is connected to ground through the resistor R12. The capacitor C7 is connected in parallel with the resistor R12, and the two ends of the capacitor C7 are connected to the light source output port.

[0014] As a further improvement to the above technical solution, one of the drive power supply circuits further includes a power supply module, the detection winding LA1 is connected to the power supply module, and the power supply module is connected to the control module.

[0015] As a further improvement to the above technical solution, the power supply module includes a resistor R13, a capacitor C8, a capacitor C9, a diode D5, a diode D6, and a diode D7.

[0016] One end of the detection winding LA1 is connected to ground, and the other end of the detection winding LA1 is connected to the anode of diode D5. The cathode of diode D5 is connected to the anode of diode D7 and one end of resistor R13. The other end of resistor R13 is connected to the anode of diode D6. The cathode of diode D6 is connected to ground through capacitor C9. The cathode of diode D7 is connected to ground through capacitor C8. The cathode of diode D7 is connected to the control module.

[0017] The beneficial effects of this utility model are as follows: This technical solution is configured with two or more drive power supply circuits. The isolation drive module in the drive power supply circuit is configured with a detection terminal and an enable terminal. The control module detects the electrical parameters and ripple parameters of each drive power supply circuit through the detection terminal. If the operating condition of the drive power supply circuit is not in compliance with the requirements, the corresponding drive power supply circuit is controlled to shut down through the configured enable terminal, and other drive power supply circuits are controlled to start, thereby realizing the switching function of the drive power supply circuit, effectively improving the service life of each drive power supply circuit, and effectively reducing the ripple parameters during the power-on process of each drive power supply circuit. Attached Figure Description

[0018] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0019] Figure 1 This is a circuit module framework diagram of this utility model;

[0020] Figure 2 This is a schematic diagram of the driving power supply circuit in this utility model;

[0021] Figure 3 This is a schematic diagram of the control module in this utility model. Detailed Implementation

[0022] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0023] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0025] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0026] Reference Figures 1 to 3 This application discloses an LED driver power supply with power supply switching function. Its first embodiment includes an AC power input port, a light source output port, a driver power supply circuit and a control module. The driver power supply circuit is configured with two or more, and the driver power supply circuit includes a rectifier filter module, an isolation driver module and an output filter module.

[0027] The mains input port is connected to the rectifier and filter module in each of the driving power circuits. In the driving power circuit, the rectifier and filter module is connected to the isolation driving module, the isolation driving module is connected to the output filter module, and the output filter module in each of the driving power circuits is connected to the light source output port.

[0028] The isolation drive module is provided with a detection terminal for monitoring its electrical parameters and an enable terminal for controlling its start-up and shutdown. The detection terminal and the enable terminal of the isolation drive module are respectively connected to the control module.

[0029] Specifically, in this embodiment, two or more drive power circuits are configured. The isolation drive module in the drive power circuit is configured with a detection terminal and an enable terminal. The control module detects the electrical parameters and ripple parameters of each drive power circuit through the detection terminal. If the operating condition of the drive power circuit is not in compliance with the requirements, the corresponding drive power circuit is shut down through the configured enable terminal, and other drive power circuits are started. This realizes the switching function of the drive power circuit, effectively improves the service life of each drive power circuit, and effectively reduces the ripple parameters during the power-on process of each drive power circuit.

[0030] As a further preferred embodiment, in this embodiment, the isolation drive module includes an isolation transformer LA, the isolation transformer is configured with a detection winding LA1, one end of the detection winding LA1 is connected to the ground, and the other end of the detection winding LA1 serves as the detection terminal of the isolation drive module.

[0031] As a further preferred embodiment, in this embodiment, the isolation driver module includes a switching power supply chip, the switching power supply chip is configured with a sampling terminal, and the sampling terminal of the switching power supply chip serves as the enable terminal of the isolation driver module.

[0032] As a further preferred embodiment, in this embodiment, the isolation drive module includes a switch Q1, resistors R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, capacitors C1, C2, C3, C4, C5, diodes D1, D2, and D3. The switching power supply chip is also configured with a power supply terminal, a drive terminal, and a feedback terminal. The isolation transformer LA is also configured with an input winding LA2 and a feedback winding LA3. In this embodiment, the switching power supply chip is model OB3636AMP or OB3379. Of course, other compatible models can also be selected for the switching power supply chip in this embodiment.

[0033] The driving terminal of the switching power supply chip is connected to the gate of the switching transistor Q1 through resistor R1. The gate of the switching transistor Q1 is connected to the anode of the diode D1 through resistor R5. The cathode of the diode D1 is connected to the driving terminal of the switching power supply chip. The gate of the switching transistor Q1 is connected to ground through resistors R2 and R3. One end of resistor R4 is connected to the junction of resistors R2 and R3, and the other end of resistor R4 is connected to ground through capacitor C1. The sampling terminal of the switching power supply chip is connected to the junction of resistor R4 and capacitor C1. The source of the switching transistor Q1 is connected to the junction of resistors R2 and R3. The drain of the switching transistor Q1 is connected to one end of the input winding LA2 and one end of resistor R6. The other end of the input winding LA2 is connected to ground through capacitor C3. The other end of resistor R6 is connected to the diode D1. The positive terminal of diode D2 is connected to the ground. The negative terminal of diode D2 is connected to the rectifier and filter module through resistor R7. One end of capacitor C2 is connected to the negative terminal of diode D2. The other end of capacitor C2 is connected to the connection point of resistor R7 and the rectifier and filter module, and also to the connection point of input winding LA2 and capacitor C3. One end of feedback winding LA3 is connected to ground. The other end of feedback winding LA3 is connected to one end of resistor R8 and one end of resistor R9. The other end of resistor R8 is connected to ground through resistor R10. Capacitor C5 is connected in parallel with resistor R10. The feedback terminal of the switching power supply chip is connected to the connection point of resistor R8 and resistor R10. The other end of resistor R9 is connected to the positive terminal of diode D3. The negative terminal of diode D3 is connected to ground through capacitor C4. The power supply terminal of the switching power supply chip is connected to the negative terminal of diode D3.

[0034] As a further preferred embodiment, in this embodiment, the output filtering module further includes resistors R11 and R12, capacitors C6 and C7, and diode D4; the isolation transformer LA further includes an output winding LA4.

[0035] One end of the output winding LA4 is connected to ground, and the other end of the output winding LA4 is connected to one end of the capacitor C6 and the positive terminal of the diode D4. The other end of the capacitor C6 is connected to the negative terminal of the diode D4 through the resistor R11. The negative terminal of the diode D4 is connected to ground through the resistor R12. The capacitor C7 is connected in parallel with the resistor R12, and the two ends of the capacitor C7 are connected to the light source output port.

[0036] As a further preferred embodiment, in this embodiment, one of the drive power supply circuits further includes a power supply module, the detection winding LA1 is connected to the power supply module, and the power supply module is connected to the control module.

[0037] As a further preferred embodiment, in this embodiment, the power supply module includes a resistor R13, a capacitor C8, a capacitor C9, a diode D5, a diode D6, and a diode D7;

[0038] One end of the detection winding LA1 is connected to ground, and the other end of the detection winding LA1 is connected to the anode of diode D5. The cathode of diode D5 is connected to the anode of diode D7 and one end of resistor R13. The other end of resistor R13 is connected to the anode of diode D6. The cathode of diode D6 is connected to ground through capacitor C9. The cathode of diode D7 is connected to ground through capacitor C8. The cathode of diode D7 is connected to the control module.

[0039] As a further preferred embodiment, this embodiment also includes multiple temperature sensors used to detect the temperature parameters of certain components in the circuit, and the control module is connected to each of the temperature sensors. In this embodiment, a thermistor is preferably selected as the temperature sensor.

[0040] As a further preferred embodiment, the control module in this embodiment includes a single-chip microcomputer of model MS51F003 and its peripheral circuits.

[0041] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the concept of this utility model and the contents of the specification and drawings of this utility model, or direct or indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. An LED driver power supply with power supply switching function, characterized in that: It includes an AC power input port, a light source output port, a drive power supply circuit, and a control module. The drive power supply circuit is configured with two or more components, including a rectifier filter module, an isolation drive module, and an output filter module. The mains input port is connected to the rectifier and filter module in each of the driving power circuits. In the driving power circuit, the rectifier and filter module is connected to the isolation driving module, the isolation driving module is connected to the output filter module, and the output filter module in each of the driving power circuits is connected to the light source output port. The isolation drive module is provided with a detection terminal for monitoring its electrical parameters and an enable terminal for controlling its start-up and shutdown. The detection terminal and the enable terminal of the isolation drive module are respectively connected to the control module.

2. The LED driver power supply with power supply switching function according to claim 1, characterized in that: The isolation drive module includes an isolation transformer LA, which is equipped with a detection winding LA1. One end of the detection winding LA1 is connected to the ground, and the other end of the detection winding LA1 serves as the detection terminal of the isolation drive module.

3. The LED driver power supply with power supply switching function according to claim 2, characterized in that: The isolation driver module includes a switching power supply chip, which is equipped with a sampling terminal, and the sampling terminal of the switching power supply chip serves as the enable terminal of the isolation driver module.

4. The LED driver power supply with power supply switching function according to claim 3, characterized in that: The isolation drive module includes a switch Q1, resistors R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, capacitors C1, C2, C3, C4, C5, diodes D1, D2, and D3. The switching power supply chip is also equipped with a power supply terminal, a drive terminal, and a feedback terminal. The isolation transformer LA is also equipped with an input winding LA2 and a feedback winding LA3. The driving terminal of the switching power supply chip is connected to the gate of the switching transistor Q1 through resistor R1. The gate of the switching transistor Q1 is connected to the anode of the diode D1 through resistor R5. The cathode of the diode D1 is connected to the driving terminal of the switching power supply chip. The gate of the switching transistor Q1 is connected to ground through resistors R2 and R3. One end of resistor R4 is connected to the junction of resistors R2 and R3, and the other end of resistor R4 is connected to ground through capacitor C1. The sampling terminal of the switching power supply chip is connected to the junction of resistor R4 and capacitor C1. The source of the switching transistor Q1 is connected to the junction of resistors R2 and R3. The drain of the switching transistor Q1 is connected to one end of the input winding LA2 and one end of resistor R6. The other end of the input winding LA2 is connected to ground through capacitor C3. The other end of resistor R6 is connected to the diode D1. The positive terminal of diode D2 is connected to the ground. The negative terminal of diode D2 is connected to the rectifier and filter module through resistor R7. One end of capacitor C2 is connected to the negative terminal of diode D2. The other end of capacitor C2 is connected to the connection point of resistor R7 and the rectifier and filter module, and also to the connection point of input winding LA2 and capacitor C3. One end of feedback winding LA3 is connected to ground. The other end of feedback winding LA3 is connected to one end of resistor R8 and one end of resistor R9. The other end of resistor R8 is connected to ground through resistor R10. Capacitor C5 is connected in parallel with resistor R10. The feedback terminal of the switching power supply chip is connected to the connection point of resistor R8 and resistor R10. The other end of resistor R9 is connected to the positive terminal of diode D3. The negative terminal of diode D3 is connected to ground through capacitor C4. The power supply terminal of the switching power supply chip is connected to the negative terminal of diode D3.

5. An LED driver power supply with power supply switching function according to claim 4, characterized in that: The output filtering module also includes resistors R11 and R12, capacitors C6 and C7, and diode D4; the isolation transformer LA also includes an output winding LA4. One end of the output winding LA4 is connected to ground, and the other end of the output winding LA4 is connected to one end of the capacitor C6 and the positive terminal of the diode D4. The other end of the capacitor C6 is connected to the negative terminal of the diode D4 through the resistor R11. The negative terminal of the diode D4 is connected to ground through the resistor R12. The capacitor C7 is connected in parallel with the resistor R12, and the two ends of the capacitor C7 are connected to the light source output port.

6. An LED driver power supply with power supply switching function according to claim 2, characterized in that: One of the drive power supply circuits further includes a power supply module, the detection winding LA1 is connected to the power supply module, and the power supply module is connected to the control module.

7. An LED driver power supply with power supply switching function according to claim 6, characterized in that: The power supply module includes resistor R13, capacitor C8, capacitor C9, diode D5, diode D6, and diode D7; One end of the detection winding LA1 is connected to ground, and the other end of the detection winding LA1 is connected to the anode of diode D5. The cathode of diode D5 is connected to the anode of diode D7 and one end of resistor R13. The other end of resistor R13 is connected to the anode of diode D6. The cathode of diode D6 is connected to ground through capacitor C9. The cathode of diode D7 is connected to ground through capacitor C8. The cathode of diode D7 is connected to the control module.

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