Control circuit of isolation constant-voltage fantasy colored lamp band controller

Abstract

The utility model discloses a control circuit of an isolation constant-voltage fantasy color lamp band controller, which comprises a power supply module, a signal amplification module and a control module, the power supply module comprises a main control chip U1, an inductor LF1, an inductor L1, a rectifier bridge BD1, a transformer T1, a polar capacitor C1, a polar capacitor C2, a polar capacitor C3, a polar capacitor C4, an optocoupler U2, a field effect transistor Q1, a diode D1, a diode D2, a diode D3, a Schottky diode D7 and a controllable precision voltage stabilization source IC3. The signal amplification module comprises a diode D4, a polar capacitor C5, a triode Q9, a voltage stabilizing diode ZD3, a control chip U13, a control chip Q3, a control chip Q4 and a signal input interface P1. The LED lamp strip has fewer electronic elements and low production cost, does not need to be charged when being connected with a long lamp strip, ensures normal use of the lamp strip, is convenient to use, and has good use experience of consumers.

Description

Technical Field

[0001] The utility model relates to the technical field of control circuits, in particular to an isolated constant-voltage magic light belt controller control circuit. Background Art

[0002] A fantasy light strip is a color light strip that is controlled by the three primary colors of RGB. With the improvement of people's living standards, fantasy light strips have become daily lamps for people to decorate and illuminate. Existing fantasy light strips generally use controllers to control the light of the light strips. The controller control circuit is generally divided into a non-isolated control circuit and an isolated control circuit. However, the existing isolated control circuit uses more electronic components and has a high production cost. At the same time, when a long light strip is connected and used, the light strip needs to be recharged for normal use, which is inconvenient to use and consumers have a poor experience. Therefore, in order to avoid the shortcomings of the prior art, it is necessary to improve the prior art. Utility Model Content

[0003] The purpose of the utility model is to overcome the shortcomings and deficiencies in the prior art and to provide an isolated constant voltage fantasy light strip controller control circuit.

[0004] The utility model is realized by the following technical solutions:

[0005] An isolated constant voltage fantasy light strip controller control circuit includes a power module, a signal amplification module and a control module. The power module includes a main control chip U1, an inductor LF1, an inductor L1, a rectifier bridge BD1, a transformer T1, a polarity capacitor C1, a polarity capacitor C2, a polarity capacitor C3, a polarity capacitor C4, an optocoupler U2, a field effect tube Q1, a diode D1, a diode D2, a diode D3, a Schottky diode D7 and a controllable precision voltage source IC3. The signal amplification module includes a diode D4, a polarity capacitor C5, a transistor Q9, a voltage regulator diode ZD3, a control chip U13, a control chip Q3, a control chip Q4 and The control module is connected to the signal amplification module through the signal input interface P1, the sixth pin of the main control chip U1 is connected to the gate of the field effect tube Q1 through the resistor R8, the source of the field effect tube Q1 is grounded through the resistor RS1, the fourth pin of the main control chip U1 is connected to the source of the field effect tube Q1 through the resistor R7, the fourth pin of the main control chip U1 is connected to the gate of the field effect tube Q1 through the resistor R7 and the resistor R9, the fifth pin of the main control chip U1 is connected to the positive electrode of the first primary winding of the transformer T1 through the resistor R2 and the resistor R1, the drain of the field effect tube Q1 is grounded through the resistor RS1, the The fifth pin of the main control chip U1 is connected to the cathode of the diode D1, the anode of the diode D1 is connected to the anode of the second primary winding of the transformer T1 through a resistor R31, the resistor R31 is connected in parallel with a resistor R32, the cathode of the second primary winding of the transformer T1 is grounded, the anode of the secondary winding of the transformer T1 is connected to the anode of the Schottky diode D7, the cathode of the Schottky diode D7 is connected to the power output terminal Vout+ through an inductor L1, the cathode of the secondary winding of the transformer T1 is connected to the power output terminal Vout-, and the Schottky diode D7 is connected to the power output terminal Vout+ through an inductor L1. The cathode of the base diode D7 is connected to the K terminal of the controllable precision voltage-stabilizing source IC3 through resistors R15 and R14, the A terminal of the controllable precision voltage-stabilizing source IC3 is grounded through capacitor CY1, the R terminal of the controllable precision voltage-stabilizing source IC3 is connected to the power output terminal Vout+ through resistor R22, the resistor R22 is connected in parallel with resistor R23, the anode of the optocoupler U2 is connected to the cathode of the Schottky diode D7 through resistor R15, the cathode of the optocoupler U2 is connected to the K terminal of the controllable precision voltage-stabilizing source IC3, the collector of the optocoupler U2 is connected to the second pin of the main control chip U1, and the emitter of the optocoupler U2 is grounded.

[0006] Furthermore, the chip model of the main control chip U1 is KP3QFL.

[0007] Furthermore, the chip model of the controllable precision voltage regulator IC3 is TL431.

[0008] Furthermore, the drain of the field effect transistor Q1 is connected to the anode of the diode D3, the cathode of the diode D3 is connected to the anode of the first primary winding of the transformer T1 through the capacitor C12, the sixth pin of the main control chip U1 is connected to the cathode of the diode D3, and the anode of the diode D3 is connected to the drain of the field effect transistor Q1.

[0009] Further, the collector of the transistor Q9 is connected to the cathode of the diode D4 through the resistor R33, the anode of the diode D4 is connected to the power output terminal Vout+, the collector of the transistor Q9 is connected to the anode of the polarity capacitor C5, the cathode of the polarity capacitor C5 is grounded through the capacitor CY1, the base of the transistor Q9 is connected to the cathode of the voltage zener diode ZD3, the anode of the voltage zener diode ZD3 is grounded through the capacitor CY1, the emitter of the transistor Q9 is respectively connected to the IN port of the control chip Q3 and the IN port of the control chip Q4, and the emitter of the transistor Q9 is grounded through the capacitor C20 and the capacitor CY1.

[0010] Furthermore, the collector of the optical coupler U2 is grounded through the resistor RT and the resistor RT1.

[0011] Furthermore, the output positive electrode of the rectifier bridge BD1 is connected to the positive electrode of the polar capacitor C1, the negative electrode of the polar capacitor C1 is grounded, and the polar capacitor C1 is connected in parallel with a resistor R3 and a resistor R4 connected in series.

[0012] Further, the fifth pin of the main control chip U1 is connected to the positive electrode of the polarity capacitor C2, the negative electrode of the polarity capacitor C2 is grounded, the polarity capacitor C2 is connected in parallel with a capacitor C4, the fourth pin of the main control chip U1 is grounded through the capacitor C5, the fourth pin of the main control chip U1 is grounded, the second pin of the main control chip U1 is grounded through the capacitor C6, and the third pin of the main control chip U1 is grounded through the capacitor C66.

[0013] Furthermore, the negative electrode of the polar capacitor C3 is connected to the negative electrode of the secondary winding of the transformer T1, the positive electrode of the polar capacitor C3 is connected to the negative electrode of the Schottky diode D7, the positive electrode of the polar capacitor C4 is connected to the power output terminal Vout+, and the negative electrode of the polar capacitor C4 is connected to the power output terminal Vout-.

[0014] Furthermore, the chip model of the control chip Q3 is LDO3.3V, the chip model of the control chip Q4 is LDO5V, and the chip model of the control chip U13 is BL1551.

[0015] Compared with the prior art, the utility model sets an inductor LF1, a rectifier bridge BD1 and a main control chip U1 through a power module to stably control the input voltage and current, sets the main control chip U1, a field effect transistor Q1, a transformer T1, a Schottky diode D7 and an inductor L1 to stably control the output voltage and current, sets an optocoupler U2 and a controllable precision voltage regulator IC3 to feedback information and adjust and compensate the voltage and current, so that the electronic components of the isolation control circuit are less and the production cost is low. At the same time, when a long light strip is connected for use, there is no need to supplement the power of the light strip, thereby ensuring the normal use of the light strip, easy to use, and good consumer experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 The utility model is a circuit schematic diagram of the control circuit of the isolated constant voltage fantasy light strip controller. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] like Figure 1The utility model is shown as an isolated constant voltage fantasy light strip controller control circuit, including a power module, a signal amplification module and a control module. The power module includes a main control chip U1, an inductor LF1, an inductor L1, a rectifier bridge BD1, a transformer T1, a polarity capacitor C1, a polarity capacitor C2, a polarity capacitor C3, a polarity capacitor C4, an optocoupler U2, a field effect tube Q1, a diode D1, a diode D2, a diode D3, a Schottky diode D7 and a controllable precision voltage source IC3. The signal amplification module includes a diode D4, a polarity capacitor C5, a transistor Q9, a voltage regulator diode ZD3, a control module The control chip U13, the control chip Q3, the control chip Q4 and the signal input interface P1 are connected. The control module is connected to the signal amplification module through the signal input interface P1. The sixth pin of the main control chip U1 is connected to the gate of the field effect tube Q1 through the resistor R8. The source of the field effect tube Q1 is grounded through the resistor RS1. The fourth pin of the main control chip U1 is connected to the source of the field effect tube Q1 through the resistor R7. The fourth pin of the main control chip U1 is connected to the gate of the field effect tube Q1 through the resistor R7 and the resistor R9. The fifth pin of the main control chip U1 is connected to the first primary winding of the transformer T1 through the resistor R2 and the resistor R1. The positive electrode of the group, the drain of the field effect tube Q1 is connected to the negative electrode of the first primary winding of the transformer T1, the fifth pin of the main control chip U1 is connected to the negative electrode of the diode D1, the positive electrode of the diode D1 is connected to the positive electrode of the second primary winding of the transformer T1 through the resistor R31, the resistor R31 is connected in parallel with the resistor R32, the negative electrode of the second primary winding of the transformer T1 is grounded, the positive electrode of the secondary winding of the transformer T1 is connected to the positive electrode of the Schottky diode D7, the negative electrode of the Schottky diode D7 is connected to the power output terminal Vout+ through the inductor L1, and the negative electrode of the secondary winding of the transformer T1 is connected to the power output terminal Vou t-, the cathode of Schottky diode D7 is connected to the K terminal of controllable precision voltage regulator IC3 through resistors R15 and R14, the A terminal of controllable precision voltage regulator IC3 is grounded through capacitor CY1, the R terminal of controllable precision voltage regulator IC3 is connected to the power output terminal Vout+ through resistor R22, resistor R22 is connected in parallel with resistor R23, the anode of optocoupler U2 is connected to the cathode of Schottky diode D7 through resistor R15, the cathode of optocoupler U2 is connected to the K terminal of controllable precision voltage regulator IC3, the collector of optocoupler U2 is connected to the second pin of main control chip U1, and the emitter of optocoupler U2 is grounded. The power module is provided with inductor LF1, rectifier bridge BD1 and main control chip U1 to stably control the input voltage and current, and is provided with main control chip U1, field effect transistor Q1, transformer T1, Schottky diode D7 and inductor L1 to stably control the output voltage and current, and is provided with optocoupler U2 and controllable precision voltage regulator IC3 to feedback information and adjust and compensate the voltage and current, so that the electronic components of the isolation control circuit are less and the production cost is low. At the same time, when a long light strip is connected for use, there is no need to supplement the power of the light strip, so as to ensure the normal use of the light strip, and the use is convenient and the consumer experience is good.

[0020] As a specific implementation, the chip model of the main control chip U1 is KP3QFL.

[0021] As a specific implementation method, the chip model of the controllable precision voltage regulator IC3 is TL431, which has good thermal stability, a large voltage adjustment range and low cost.

[0022] The drain of the field effect transistor Q1 is connected to the anode of the diode D3, the cathode of the diode D3 is connected to the anode of the first primary winding of the transformer T1 through the capacitor C12, the sixth pin of the main control chip U1 is connected to the cathode of the diode D3, and the anode of the diode D3 is connected to the drain of the field effect transistor Q1, thereby improving the stability of the voltage input of the first primary winding of the transformer T1.

[0023] The collector of the transistor Q9 is connected to the cathode of the diode D4 through the resistor R33, the anode of the diode D4 is connected to the power output terminal Vout+, the collector of the transistor Q9 is connected to the anode of the polarity capacitor C5, the cathode of the polarity capacitor C5 is grounded through the capacitor CY1, the base of the transistor Q9 is connected to the cathode of the voltage-stabilizing diode ZD3, the anode of the voltage-stabilizing diode ZD3 is grounded through the capacitor CY1, the emitter of the transistor Q9 is respectively connected to the IN port of the control chip Q3 and the IN port of the control chip Q4, and the emitter of the transistor Q9 is grounded through the capacitor C20 and the capacitor CY1, so as to avoid the influence of the control signal on the voltage output and improve the stability of the signal control and the stability of the voltage output.

[0024] The collector of the optocoupler U2 is grounded through the resistor RT and the resistor RT1, thereby improving the operating stability of the optocoupler U2.

[0025] The output positive electrode of the rectifier bridge BD1 is connected to the positive electrode of the polar capacitor C1, the negative electrode of the polar capacitor C1 is grounded, and the polar capacitor C1 is connected in parallel with the resistor R3 and the resistor R4 connected in series, so as to improve the stability of the output voltage of the rectifier bridge BD1.

[0026] The fifth pin of the main control chip U1 is connected to the positive electrode of the polarity capacitor C2, the negative electrode of the polarity capacitor C2 is grounded, the polarity capacitor C2 is connected in parallel with a capacitor C4, the fourth pin of the main control chip U1 is grounded through the capacitor C5, the fourth pin of the main control chip U1 is grounded, the second pin of the main control chip U1 is grounded through the capacitor C6, and the third pin of the main control chip U1 is grounded through the capacitor C66, thereby improving the safety and stability of the operation of the main control chip U1.

[0027] The negative electrode of the polarity capacitor C3 is connected to the negative electrode of the secondary winding of the transformer T1, the positive electrode of the polarity capacitor C3 is connected to the negative electrode of the Schottky diode D7, the positive electrode of the polarity capacitor C4 is connected to the power output terminal Vout+, and the negative electrode of the polarity capacitor C4 is connected to the power output terminal Vout-, thereby improving the stability of the output current of the transformer T1.

[0028] As a specific implementation method, the chip model of the control chip Q3 is LDO3.3V, and the chip model of the control chip Q4 is LDO5V, which improves the accuracy of voltage conversion. The chip model of the control chip U13 is BL1551, and the signal simulation switch can cut off and switch the signal in time to improve the accuracy of signal transmission.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An isolated constant voltage colorful light strip controller circuit, Features: It includes a power supply module, a signal amplification module and a control module. The power supply module includes a main control chip U1, an inductor LF1, an inductor L1, a rectifier bridge BD1, a transformer T1, a polarity capacitor C1, a polarity capacitor C2, a polarity capacitor C3, a polarity capacitor C4, an optocoupler U2, a field effect tube Q1, a diode D1, a diode D2, a diode D3, a Schottky diode D7 and a controllable precision voltage source IC3. The signal amplification module includes a diode D4, a polarity capacitor C5, a transistor Q9, a voltage regulator diode ZD3, a control chip U13, a control chip Q3, a control chip Q4 and a signal input interface P1. The control The module is connected to the signal amplification module through the signal input interface P1, the sixth pin of the main control chip U1 is connected to the gate of the field effect tube Q1 through the resistor R8, the source of the field effect tube Q1 is grounded through the resistor RS1, the fourth pin of the main control chip U1 is connected to the source of the field effect tube Q1 through the resistor R7, the fourth pin of the main control chip U1 is connected to the gate of the field effect tube Q1 through the resistor R7 and the resistor R9, the fifth pin of the main control chip U1 is connected to the positive electrode of the first primary winding of the transformer T1 through the resistor R2 and the resistor R1, and the drain of the field effect tube Q1 is connected to the transformer T 1, the fifth pin of the main control chip U1 is connected to the cathode of the diode D1, the anode of the diode D1 is connected to the anode of the second primary winding of the transformer T1 through a resistor R31, the resistor R31 is connected in parallel with a resistor R32, the cathode of the second primary winding of the transformer T1 is grounded, the anode of the secondary winding of the transformer T1 is connected to the anode of the Schottky diode D7, the cathode of the Schottky diode D7 is connected to the power output terminal Vout+ through an inductor L1, the cathode of the secondary winding of the transformer T1 is connected to the power output terminal Vout-, and the Schottky diode D The cathode of 7 is connected to the K terminal of the controllable precision voltage-stabilizing source IC3 through resistors R15 and R14, the A terminal of the controllable precision voltage-stabilizing source IC3 is grounded through capacitor CY1, the R terminal of the controllable precision voltage-stabilizing source IC3 is connected to the power output terminal Vout+ through resistor R22, the resistor R22 is connected in parallel with resistor R23, the anode of the optical coupler U2 is connected to the cathode of the Schottky diode D7 through resistor R15, the cathode of the optical coupler U2 is connected to the K terminal of the controllable precision voltage-stabilizing source IC3, the collector of the optical coupler U2 is connected to the second pin of the main control chip U1, and the emitter of the optical coupler U2 is grounded.

2. The isolated constant voltage colorful light strip controller control circuit according to claim 1, Features: The chip model of the main control chip U1 is KP3QFL.

3. The isolated constant voltage colorful light strip controller control circuit according to claim 1, Features: The chip model of the controllable precision voltage regulator IC3 is TL431.

4. The isolated constant voltage colorful light strip controller control circuit according to claim 1, Features: The drain of the field effect transistor Q1 is connected to the anode of the diode D3, the cathode of the diode D3 is connected to the anode of the first primary winding of the transformer T1 through the capacitor C12, the sixth pin of the main control chip U1 is connected to the cathode of the diode D3, and the anode of the diode D3 is connected to the drain of the field effect transistor Q1.

5. The isolated constant voltage colorful light strip controller control circuit according to claim 1, Features: The collector of the transistor Q9 is connected to the cathode of the diode D4 through a resistor R33, the anode of the diode D4 is connected to the power output terminal Vout+, the collector of the transistor Q9 is connected to the anode of the polarity capacitor C5, the cathode of the polarity capacitor C5 is grounded through a capacitor CY1, the base of the transistor Q9 is connected to the cathode of the voltage zener diode ZD3, the anode of the voltage zener diode ZD3 is grounded through a capacitor CY1, the emitter of the transistor Q9 is respectively connected to the IN port of the control chip Q3 and the IN port of the control chip Q4, and the emitter of the transistor Q9 is grounded through a capacitor C20 and a capacitor CY1.

6. The isolated constant voltage colorful light strip controller control circuit according to claim 1, Features: The collector of the optical coupler U2 is grounded through the resistor RT and the resistor RT1.

7. The isolated constant voltage colorful light strip controller control circuit according to claim 1, Features: The output positive electrode of the rectifier bridge BD1 is connected to the positive electrode of the polar capacitor C1, the negative electrode of the polar capacitor C1 is grounded, and the polar capacitor C1 is connected in parallel with a resistor R3 and a resistor R4 connected in series.

8. The isolated constant voltage colorful light strip controller control circuit according to claim 1, Features: The fifth pin of the main control chip U1 is connected to the positive electrode of the polarity capacitor C2, the negative electrode of the polarity capacitor C2 is grounded, the polarity capacitor C2 is connected in parallel with a capacitor C4, the fourth pin of the main control chip U1 is grounded through the capacitor C5, the fourth pin of the main control chip U1 is grounded, the second pin of the main control chip U1 is grounded through the capacitor C6, and the third pin of the main control chip U1 is grounded through the capacitor C66.

9. The isolated constant voltage colorful light strip controller control circuit according to claim 1, Features: The negative electrode of the polar capacitor C3 is connected to the negative electrode of the secondary winding of the transformer T1, the positive electrode of the polar capacitor C3 is connected to the negative electrode of the Schottky diode D7, the positive electrode of the polar capacitor C4 is connected to the power output terminal Vout+, and the negative electrode of the polar capacitor C4 is connected to the power output terminal Vout-.

10. The isolated constant voltage colorful light strip controller control circuit according to claim 1, Features: The chip model of the control chip Q3 is LDO3.3V, the chip model of the control chip Q4 is LDO5V, and the chip model of the control chip U13 is BL1551.

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