CN217363359U

CN217363359U - Drive power supply control circuit for outputting pure and stable direct-current voltage

Info

Publication number: CN217363359U
Application number: CN202220751292.2U
Authority: CN
Inventors: 余炎
Original assignee: Jiangmen Xindun Electronic Technology Co ltd
Current assignee: Jiangmen Xindun Electronic Technology Co ltd
Priority date: 2022-04-02
Filing date: 2022-04-02
Publication date: 2022-09-02
Anticipated expiration: 2032-04-02

Abstract

The utility model discloses a drive power supply control circuit of pure stable DC voltage of output, including electromagnetic interference filter circuit, with input rectification filter circuit that electromagnetic interference filter circuit connects, with the power conversion circuit that input rectification filter circuit connects, with output rectification filter circuit that power conversion circuit connects and with the vice limit feedback circuit that output rectification filter circuit connects, power conversion circuit include diode D1, diode D5, polarity electric capacity EC2, field effect transistor Q1, transformer T1 and with the main control chip U1 that transformer T1 connects, vice limit feedback circuit includes pilot lamp LED1, opto-coupler U2 and stabiliser U3. The utility model discloses can obtain pure stable low pressure DC voltage, overcurrent protection, short-circuit protection, overvoltage protection and excess temperature protection effect are good, and safe in utilization possesses ultralow starting current, reduces standby power consumption, can prevent that the customer from overpower from using, improves life.

Description

Drive power supply control circuit for outputting pure and stable direct-current voltage

Technical Field

The utility model relates to a control circuit, concretely relates to output pure stable direct current voltage's drive power supply control circuit.

Background

With the progress of science and technology, LED lamps are becoming mainstream lighting fixtures in the market. The LED lamp is generally matched with a driving power supply control circuit to control lighting, the driving power supply control circuit directly influences the service life and the lighting effect of the LED lamp, but the voltage output by the existing driving power supply control circuit is unstable and impure, the power consumption is high during standby, the protection function is incomplete, the overcurrent protection, short-circuit protection, overvoltage protection and over-temperature protection effects are poor, and the intermittent mode and the continuous mode are generally not supported. Therefore, there is a need for improvements in the prior art to avoid the disadvantages of the prior art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the shortcoming and not enough among the prior art, provide a drive power supply control circuit of the pure stable direct current voltage of output that the operation is stable, protect function is perfect.

The utility model discloses a realize through following technical scheme:

the utility model provides an output pure stable DC voltage's drive power supply control circuit, including electromagnetic interference filter circuit, with the input rectification filter circuit that electromagnetic interference filter circuit connects, with the power conversion circuit that input rectification filter circuit connects, with the output rectification filter circuit that power conversion circuit connects and with the secondary feedback circuit that output rectification filter circuit connects, electromagnetic interference filter circuit includes that protective tube F1, electric capacity CX1 and with inductor L1 that electric capacity CX1 is connected, input rectification filter circuit include rectifier bridge BD1 and with polarity electric capacity EC1 that rectifier bridge BD1 is connected, power conversion circuit includes diode D1, diode D5, polarity electric capacity EC2, field effect tube Q1, transformer T1 and with master control chip U1 that transformer T1 is connected, output rectification filter circuit includes diode D3 and polarity electric capacity EC3, the secondary feedback circuit comprises an indicator light LED1, an optocoupler U2 and a voltage stabilizer U3, wherein the transformer T1 comprises a first primary coil T1B, a second primary coil T1C and a secondary coil T1A, the model of the main control chip U1 is KP201, the R end of the voltage stabilizer U3 is connected with the output anode through a resistor R15, the K end of the voltage stabilizer U3 is connected with the negative electrode input end of the optocoupler U2, the A end of the voltage stabilizer U3 is grounded through a capacitor CY1, the anode input end of the optocoupler U2 is connected with the output anode through a resistor R12A, the collector output end of the optocoupler U2 is connected with the third pin of the main control chip U1, the third pin of the main control chip U1 is grounded through a capacitor C1 and a capacitor CY1, and the emitter output end of the optocoupler U2 is grounded through a capacitor CY 1.

Further, the input 2 pin of the first primary winding T1B is connected to the anode of the diode D1, the input 1 pin of the first primary winding T1B is connected to the cathode of the diode D1 through a resistor R7, the resistor R7 is connected in parallel with a capacitor C4, the input 2 pin of the first primary winding T1B is connected to the D terminal of the fet Q1, the S terminal of the fet Q1 is grounded through a resistor RS1 and a capacitor CY 695 2, the S terminal of the fet Q1 is connected to the third pin of the main control chip U1 through a resistor R3A, the G terminal of the fet Q1 is connected to the fifth pin of the main control chip U1 through a resistor R4, the input 3 pin of the second primary winding T1C is connected to the anode of the diode D C through a resistor R C and the cathode of the first primary winding T1C is connected to the cathode of the diode D C, and the diode D C is connected to the sixth pin C through a resistor R C and the cathode of the main control chip U C, an input 4 pin of the second primary coil T1C is connected to the fifth pin of the main control chip U1 through a resistor R1 and a resistor R4, and an input 4 pin of the second primary coil T1C is grounded through a capacitor CY 1.

Further, the output 5 pin of the secondary coil T1A is connected to the anode of the diode D3, the cathode of the diode D3 is connected to the anode of the polar capacitor EC3, the cathode of the polar capacitor EC3 is connected to the output 6 pin of the secondary coil T1A, the anode of the diode D3 is connected to the cathode of the diode D3 through a resistor R11 and a capacitor C5, and the polar capacitor EC3 is connected in parallel to a resistor R18.

Further, the type of the optocoupler U2 is PC817, and the type of the voltage stabilizer U3 is TL 431.

Further, a sixth pin of the main control chip U1 is connected to the positive electrode of the polar capacitor EC2, the negative electrode of the polar capacitor EC2 is grounded through a capacitor CY1, a first pin of the main control chip U1 is connected to a second pin of the main control chip U1 through a capacitor C2, and a first pin of the chip U1 is grounded through a capacitor CY 1.

Further, the positive electrode of the polar capacitor EC1 is connected to the output positive electrode of the rectifier bridge BD1, and the negative electrode of the polar capacitor EC1 is grounded through a capacitor CY 1.

Further, the K end of the voltage stabilizer U3 is connected to the output anode through a resistor R13 and a resistor R12, the K end of the voltage stabilizer U3 is connected to the R end of the voltage stabilizer U3 through a capacitor C6 and a resistor R17A, and the R end of the voltage stabilizer U3 is connected to the a end of the voltage stabilizer U3 through a resistor R14.

Further, the anode of the indicator light LED1 is connected to the anode of the output through the resistor RA, and the cathode of the indicator light LED1 is grounded through the capacitor CY 1.

Compared with the prior art, the utility model discloses a set up power conversion circuit and vice limit feedback circuit and control the voltage of output, make drive power supply control circuit can obtain pure stable low pressure DC voltage, main control chip U1 is inside to have integrateed perfect protect function, overcurrent protection, short-circuit protection, overvoltage protection and excess temperature protection effect are good, possess ultralow starting current, reduce standby power consumption, improve switching power supply efficiency, the inside former limit constant current technique that has still integrateed of main control chip U1 in addition, can support discontinuous mode and continuous mode, compatible constant current constant voltage, prevent that the customer from overpower from using, improve power life, high durability and safety, energy-concerving and environment-protective.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a schematic circuit diagram of the driving power supply control circuit for outputting pure and stable dc voltage.

In the figure: 1-an electromagnetic interference filter circuit; 2-input rectifying filter circuit; 3-a power conversion circuit; 4-output rectifying filter circuit; 5-secondary feedback circuit.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1, the present invention relates to a driving power supply control circuit for outputting pure and stable dc voltage, which comprises an electromagnetic interference filter circuit 1, an input rectifying and filtering circuit 2 connected to the electromagnetic interference filter circuit 1, a power conversion circuit 3 connected to the input rectifying and filtering circuit 2, an output rectifying and filtering circuit 4 connected to the power conversion circuit 3, and a secondary feedback circuit 5 connected to the output rectifying and filtering circuit 4, wherein the electromagnetic interference filter circuit 1 comprises a fuse F1, a capacitor CX1, and an inductor L1 connected to the capacitor CX1, the input rectifying and filtering circuit 2 comprises a rectifier bridge 1 and a polarity capacitor EC1 connected to the rectifier bridge BD1, the power conversion circuit 3 comprises a diode D1, a diode D5, a polarity capacitor EC2, a field effect transistor Q1, a transformer T1, and a main control chip U1 connected to the transformer T1, the output rectifying and filtering circuit 4 comprises a diode D3 and a polarity capacitor EC3, the secondary feedback circuit 5 comprises an indicator light LED1, an optical coupler U2 and a voltage stabilizer U3, the transformer T1 comprises a first primary coil T1B, a second primary coil T1C and a secondary coil T1A, the model of the main control chip U1 is KP201, the R end of the voltage stabilizer U3 is connected with the output anode through a resistor R15, the K end of the voltage stabilizer U3 is connected with the negative input end of the optical coupler U2, the A end of the voltage stabilizer U3 is grounded through a capacitor CY1, the anode input end of the optical coupler U2 is connected with the output anode through a resistor R12A, the collector output end of the optical coupler U2 is connected with the third pin of the main control chip U1, the third pin of the main control chip U1 is grounded through a capacitor C1 and a capacitor CY1, and the emitter output end of the optical coupler U2 is grounded through a capacitor CY 1. The output voltage is controlled by arranging the power conversion circuit 3 and the secondary feedback circuit 5, so that the driving power supply control circuit can obtain pure and stable low-voltage direct-current voltage, the perfect protection function is integrated inside the main control chip U1, the over-current protection, the short-circuit protection, the over-voltage protection and over-temperature protection effects are good, the ultra-low starting current is possessed, the standby power consumption is reduced, the switching power supply efficiency is improved, in addition, the primary constant-current technology is also integrated inside the main control chip U1, the intermittent mode and the continuous mode can be supported, the constant-current constant-voltage is compatible, the use of the client over-power is prevented, the service life of the power supply is prolonged, the use is safe, energy conservation and environmental protection.

An input 2 pin of the first primary coil T1B is connected with an anode of the diode D1, an input 1 pin of the first primary coil T1B is connected with a cathode of the diode D1 through a resistor R7, a resistor R7 is connected in parallel with a capacitor C4, the input 2 pin of the first primary coil T1 4 is connected with a D terminal of the field effect transistor Q4, an S terminal of the field effect transistor Q4 is grounded through a resistor RS 4 and a capacitor CY 4, the S terminal of the field effect transistor Q4 is connected with a third pin of the main control chip U4 through a resistor R3 4, a G terminal of the field effect transistor Q4 is connected with a fifth pin of the main control chip U4 through a resistor R4, an input 3 pin of the second primary coil T1 4 is connected with an anode of the diode D4 through a resistor R4 and a resistor R4, a cathode of the diode D4 is connected with a cathode of the main control chip U4 and a cathode of the main control chip T4 through a resistor R4 and a second pin of the main control chip 4 and a resistor R4 are connected with a cathode of the main control chip 4 and a resistor R4 and a second primary chip 4. The input 4 feet of the second primary coil T1C are grounded through the capacitor CY1, so that the stability and the safety of power conversion of the power conversion circuit are improved.

The output 5 pin of the secondary coil T1A is connected with the anode of a diode D3, the cathode of a diode D3 is connected with the anode of a polarity capacitor EC3, the cathode of the polarity capacitor EC3 is connected with the output 6 pin of the secondary coil T1A, the anode of a diode D3 is connected with the cathode of a diode D3 through a resistor R11 and a capacitor C5, and the polarity capacitor EC3 is connected with a resistor R18 in parallel, so that the stability of output voltage is improved.

In specific implementation, the type of the optocoupler U2 is PC817, and the type of the voltage stabilizer U3 is TL431, so that the accuracy of voltage feedback and the stability of voltage control are improved.

The sixth pin of the main control chip U1 is connected to the positive electrode of the polar capacitor EC2, the negative electrode of the polar capacitor EC2 is grounded through the capacitor CY1, the first pin of the main control chip U1 is connected to the second pin of the main control chip U1 through the capacitor C2, and the first pin of the chip U1 is grounded through the capacitor CY1, so that the stability and safety of the operation of the main control chip U1 are ensured.

The positive pole of the polar capacitor EC1 is connected with the output positive pole of the rectifier bridge BD1, the negative pole of the polar capacitor EC1 is grounded through the capacitor CY1, rectification filtering is realized on the input voltage, and the stability of the input voltage is ensured.

The K end of stabiliser U3 passes through resistance R13 and resistance R12 and connects the output positive pole, and the K end of stabiliser U3 passes through electric capacity C6 and resistance R17A and is connected with stabiliser U3's R end, and stabiliser U3's R end passes through resistance R14 and is connected with stabiliser U3's A end, guarantees the stability of stabiliser U3 operation, carries out stability control to voltage.

The positive pole of pilot lamp LED1 passes through resistance RA and connects the output positive pole, and the negative pole of pilot lamp LED1 passes through electric capacity CY1 and earths, shows voltage output.

The above description is only for the preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A drive power supply control circuit for outputting pure and stable direct-current voltage is characterized in that: including electromagnetic interference filter circuit, with input rectifier filter circuit that electromagnetic interference filter circuit connects, with the power conversion circuit that input rectifier filter circuit connects, with output rectifier filter circuit that power conversion circuit connects and with the vice limit feedback circuit that output rectifier filter circuit connects, electromagnetic interference filter circuit include fuse F1, electric capacity CX1 and with inductor L1 that electric capacity CX1 connects, input rectifier filter circuit include rectifier bridge BD1 and with polarity electric capacity EC1 that rectifier bridge BD1 connects, power conversion circuit includes diode D1, diode D5, polarity electric capacity EC2, field effect tube Q1, transformer T1 and with master control chip U1 that transformer T1 is connected, output rectifier filter circuit includes diode D3 and polarity electric capacity EC3, vice limit feedback circuit includes pilot lamp LED1, opto-coupler U2 and stabiliser U3, the transformer T1 includes first primary coil T1B, second primary coil T1C and secondary coil T1A, the model of master control chip U1 is KP201, the R end of stabiliser U3 passes through resistance R15 and connects the output positive pole, the K end of stabiliser U3 is connected the negative pole input end of opto-coupler U2, the A end of stabiliser U3 passes through electric capacity CY1 ground connection, the positive pole input end of opto-coupler U2 passes through resistance R12A and connects the output positive pole, the third pin of master control chip U1 is connected to the collector output terminal of opto-coupler U2, the third pin of master control chip U1 passes through electric capacity C1 and electric capacity CY1 ground connection, the emitter output terminal of opto-coupler U2 passes through electric capacity CY1 ground connection.

2. The driving power control circuit according to claim 1, wherein: an input 2 pin of the first primary coil T1B is connected to an anode of the diode D1, an input 1 pin of the first primary coil T1B is connected to a cathode of the diode D1 through a resistor R7, the resistor R7 is connected in parallel with a capacitor C4, an input 2 pin of the first primary coil T1B is connected to a D terminal of the fet Q1, an S terminal of the fet Q1 is grounded through a resistor RS1 and a capacitor CY1, an S terminal of the fet Q1 is connected to a third pin of the main control chip U1 through a resistor R3A, a G terminal of the fet Q1 is connected to a fifth pin of the main control chip U1 through a resistor R4, an input 3 pin of the second primary coil T1C is connected to an anode of the diode D C through a resistor R C and a cathode of the first primary coil T1T 72 is connected to the cathode of the diode D C, and a cathode of the diode D C is connected to the diode D C through a resistor R C and a cathode C, an input 4 pin of the second primary coil T1C is connected to the fifth pin of the main control chip U1 through a resistor R1 and a resistor R4, and an input 4 pin of the second primary coil T1C is grounded through a capacitor CY 1.

3. The driving power control circuit according to claim 1, wherein: the output 5 pin of the secondary coil T1A is connected with the anode of the diode D3, the cathode of the diode D3 is connected with the anode of the polar capacitor EC3, the cathode of the polar capacitor EC3 is connected with the output 6 pin of the secondary coil T1A, the anode of the diode D3 is connected with the cathode of the diode D3 through a resistor R11 and a capacitor C5, and the polar capacitor EC3 is connected with a resistor R18 in parallel.

4. The driving power control circuit according to claim 1, wherein: the type of opto-coupler U2 is PC817, the type of stabiliser U3 is TL 431.

5. The driving power control circuit according to claim 1, wherein: the sixth pin of the main control chip U1 is connected to the positive electrode of the polar capacitor EC2, the negative electrode of the polar capacitor EC2 is grounded through a capacitor CY1, the first pin of the main control chip U1 is connected to the second pin of the main control chip U1 through a capacitor C2, and the first pin of the chip U1 is grounded through a capacitor CY 1.

6. The driving power control circuit according to claim 1, wherein: the positive electrode of the polar capacitor EC1 is connected with the output positive electrode of the rectifier bridge BD1, and the negative electrode of the polar capacitor EC1 is grounded through a capacitor CY 1.

7. The driving power control circuit according to claim 1, wherein: the K end of the voltage stabilizer U3 is connected with the output anode through a resistor R13 and a resistor R12, the K end of the voltage stabilizer U3 is connected with the R end of the voltage stabilizer U3 through a capacitor C6 and a resistor R17A, and the R end of the voltage stabilizer U3 is connected with the A end of the voltage stabilizer U3 through a resistor R14.

8. The driving power control circuit according to claim 1, wherein: the anode of the indicator light LED1 is connected with the anode of the output through a resistor RA, and the cathode of the indicator light LED1 is grounded through a capacitor CY 1.