CN215682694U - Wide-voltage CCCV (capacitor-voltage) isolation LED (light-emitting diode) drive control circuit - Google Patents
Wide-voltage CCCV (capacitor-voltage) isolation LED (light-emitting diode) drive control circuit Download PDFInfo
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- CN215682694U CN215682694U CN202121243931.6U CN202121243931U CN215682694U CN 215682694 U CN215682694 U CN 215682694U CN 202121243931 U CN202121243931 U CN 202121243931U CN 215682694 U CN215682694 U CN 215682694U
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Abstract
The utility model discloses a wide-voltage CCCV (capacitor-capacitor) isolation LED (light-emitting diode) driving control circuit which comprises a rectifier bridge DB1, wherein a third terminal of the rectifier bridge DB1 is connected with a voltage dependent resistor ZR1 and a safety capacitor CX1, and a second terminal of the rectifier bridge DB1 is connected with a safety resistor FR 1. The circuit in the utility model is an isolated constant-current constant-voltage isolated LED drive control circuit, Q1 is a power output device MOS tube, and a Q2, a Q3 triode, an R7, an R5 resistor, a T1/B transformer winding, a C3 and a C2 capacitor form a self-excited switch oscillation circuit; a voltage stabilizing diode of a load voltage detection circuit ZD1 is added, when the LED lamp beads are in series open circuit and are not connected, the output voltage is controlled within a certain range, and the function of open circuit protection is achieved; the resistors R10, R11, R12, the zener diode ZD1, the triode Q4 and the capacitor C2 form a voltage compensation circuit, and when the voltage of the mains supply drops to a certain set value, the circuit is turned on to work, so that the stability of the circuit is enhanced.
Description
Technical Field
The utility model relates to the technical field of LED drive control circuits, in particular to a wide-voltage CCCV isolation LED drive control circuit.
Background
The prior art of the current LED drive control circuit has the following defects and shortcomings:
1. the RCC isolation LED constant current drive controllers in the prior art all use triodes as power switch elements, and have the advantages of large internal resistance, low efficiency, high heat productivity, short service life and easy damage.
2. The conventional RCC isolation LED constant current drive control circuit does not have a mains voltage compensation circuit and cannot be used in wide-voltage high-constant-current-precision application occasions.
3. In the conventional RCC isolation LED constant voltage drive control circuit, the output voltage detection is the feedback of the later stage, the circuit structure is complex (the output voltage is fed back to the primary stage by using the optical coupling for detection and adjustment), and the current constant precision is not high.
To this end, we propose a wide voltage CCCV isolated LED drive control circuit.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to a wide-voltage CCCV isolated LED driving control circuit to solve the above-mentioned problems.
In order to achieve the purpose, the utility model provides the following technical scheme: a wide-voltage CCCV isolation LED drive control circuit comprises a rectifier bridge DB1, wherein a third terminal of the rectifier bridge DB1 is connected with a piezoresistor ZR1 and a safety capacitor CX1, a second terminal of the rectifier bridge DB1 is connected with a safety resistor FR1, the other ends of the piezoresistor ZR1 and the safety capacitor CX1 are connected with a second terminal of a rectifier bridge DB1, a first terminal of the rectifier bridge DB1 is connected with an electrolytic capacitor EC1, two ends of the electrolytic capacitor EC1 are respectively connected with a resistor R1 and a resistor R1, one ends of the resistor R1 and the resistor R1 are respectively connected with a triode Q1, one end of the triode Q1 is connected with a capacitor C1, the other end of the triode Q1 is connected with a triode Q1, one end of the triode Q1 is respectively connected with a resistor R1, a resistor Q1 and a capacitor C1, one end of the resistor R8 is connected with a resistor RS1 and a resistor RS2, one end of the resistor RS2 is connected with a zener diode ZD1, the other end of the resistor RS2 is connected with a power output device MOS tube Q1, one end of the power output device MOS tube Q1 is connected with a resistor R6, one end of the zener diode ZD1 is connected with an electrolytic capacitor EC2, one end of the electrolytic capacitor EC2 is respectively connected with a transformer winding T1/B and a diode D2, one end of the diode D2 is connected with a capacitor C3, one end of the capacitor C3 is connected with a resistor R5, one end of the resistor R5 is connected with a capacitor C2, one end of the capacitor C2 is connected with a resistor R2, one end of the resistor R2 is connected with a resistor R1, one end of the resistor R1 is connected with a capacitor C1, one end of the capacitor C1 is connected with a resistor R4, one end of the resistor R4 is connected with a resistor R3, one end of the resistor R3 is connected with a diode D1, one end of the diode D1 is connected with a power output device MOS tube Q1, the other end of the diode D1 is connected with a transformer winding T1/A, one end of the transformer winding T1/A is connected with a transformer winding T1/B, the other end of the transformer winding T1/A is connected with a transformer winding T1/B, one end of the transformer winding T1/B is connected with a freewheeling diode D3 and an electrolytic capacitor EC3, one end of the electrolytic capacitor EC3 is connected with a resistor R9, and one end of the resistor R9 is connected with an LED lamp bead.
Preferably, the safety resistor FR1, the safety capacitor CX1 and the voltage dependent resistor ZR1 form an instantaneous surge pulse protection circuit.
Preferably, the rectifier bridge DB1 and the electrolytic capacitor EC1 form an AC-to-DC energy conversion circuit, which provides working energy for a subsequent circuit.
Preferably, the transformer winding T1/A, the electrolytic capacitor EC3, the freewheeling diode D3 and the power output device MOS tube Q1 form an energy conversion circuit to provide energy for the LED lamp bead string.
Preferably, the transistor Q2, the transistor Q3, the resistor R7, the resistor R5, the transformer winding T1/B, the capacitor C3 and the capacitor C2 form a self-excited switching oscillation circuit.
Preferably, the resistor R8, the resistor RS1, and the resistor RS2 form a current sampling circuit to determine the magnitude of the output current.
Preferably, the resistor R1 and the resistor R2 are power supply resistors for the overall circuit operation.
Preferably, the resistor R3, the resistor R4, the high-voltage capacitor C1 and the diode D1 form an FCD absorption circuit.
Preferably, the resistor R10, the resistor R11, the resistor R12, the zener diode ZD1, the diode D2, the transistor Q4, the capacitor C5, and the electrolytic capacitor EC2 form a current and voltage compensation circuit.
Compared with the prior art, the utility model has the following beneficial effects:
1. the circuit in the utility model is an isolated constant-current constant-voltage isolated LED drive control circuit, Q1 is a power output device MOS tube, and a Q2, a Q3 triode, an R7, an R5 resistor, a T1/B transformer winding, a C3 and a C2 capacitor form a self-excited switch oscillation circuit; a voltage stabilizing diode of a load voltage detection circuit ZD1 is added, when the LED lamp beads are in series open circuit and are not connected, the output voltage is controlled within a certain range, and the function of open circuit protection is achieved; the resistors R10, R11, R12, the zener diode ZD1, the triode Q4 and the capacitor C2 form a voltage compensation circuit, and when the voltage of the mains supply drops to a certain set value, the circuit is turned on to work, so that the stability of the circuit is enhanced.
2. The circuit has simple structure, elements used in the circuit are conventional devices, the circuit is easy to purchase and produce, the circuit is easy to debug and low in cost, TL431 and an optocoupler feedback loop are saved compared with an IC scheme on the market, about 20% of cost can be saved, an MOS tube is used as a power device, the internal resistance is small, the conversion efficiency is high, the working temperature is low, the low voltage automatic compensation is realized, the constant current precision is higher, the load voltage detection and adjustment rate is high, and the circuit is a safer and more perfect protection circuit.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a wide voltage CCCV isolation LED driving control circuit includes a rectifier bridge DB1, a voltage dependent resistor ZR1 and a safety capacitor CX1 are connected to a third terminal of the rectifier bridge DB1, a safety resistor FR1 is connected to a second terminal of the rectifier bridge DB1, the other ends of the voltage dependent resistor ZR1 and the safety capacitor CX1 are connected to a second terminal of the rectifier bridge DB1, a first terminal of the rectifier bridge DB1 is connected to an electrolytic capacitor EC1, two ends of the electrolytic capacitor EC1 are respectively connected to a resistor R1 and a resistor R1, one ends of the resistor R1 and the resistor R1 are respectively connected to a transistor Q1, one end of the transistor Q1 is connected to a capacitor C1, the other end of the transistor Q1 is connected to a transistor Q1, one end of the transistor Q1 is connected to a resistor RS1 and a resistor RS1, one end of a resistor RS2 is connected with a voltage stabilizing diode ZD1, the other end of the resistor RS2 is connected with a power output device MOS tube Q1, one end of the power output device MOS tube Q1 is connected with a resistor R6, one end of the voltage stabilizing diode ZD1 is connected with an electrolytic capacitor EC2, one end of the electrolytic capacitor EC2 is respectively connected with a transformer winding T1/B and a diode D2, one end of a diode D2 is connected with a capacitor C3, one end of the capacitor C3 is connected with a resistor R5, one end of the resistor R5 is connected with a capacitor C2, one end of the capacitor C2 is connected with a resistor R2, one end of a resistor R2 is connected with a resistor R1, one end of the resistor R1 is connected with a capacitor C1, one end of the capacitor C1 is connected with a resistor R4, one end of a resistor R4 is connected with a resistor R3, one end of a resistor R3 is connected with a diode D1, one end of the diode D1 is connected with a power output device MOS tube Q1, the other end of the diode D36 1 is connected with a transformer winding T1, one end of the transformer winding T1/A is connected with the transformer winding T1/B, the other end of the transformer winding T1/A is connected with the transformer winding T1/B, one end of the transformer winding T1/B is connected with a freewheeling diode D3 and an electrolytic capacitor EC3, one end of the electrolytic capacitor EC3 is connected with a resistor R9, and one end of the resistor R9 is connected with an LED lamp bead.
In the specific implementation, the safety resistor FR1, the safety capacitor CX1 and the voltage dependent resistor ZR1 form an instantaneous surge pulse protection circuit.
In practical application, the rectifier bridge DB1 and the electrolytic capacitor EC1 form an AC-to-DC energy conversion circuit to provide working energy for a later-stage circuit.
In the specific implementation process, the transformer winding T1/A, the electrolytic capacitor EC3, the freewheeling diode D3 and the power output device MOS tube Q1 form an energy conversion circuit to provide energy for the LED lamp bead string.
In specific implementation, the transistor Q2, the transistor Q3, the resistor R7, the resistor R5, the transformer winding T1/B, the capacitor C3 and the capacitor C2 form a self-excited switching oscillation circuit.
In the specific implementation, the resistor R8, the resistor RS1 and the resistor RS2 form a current sampling circuit to determine the magnitude of the output current.
In practical implementation, the resistors R1 and R2 are power supply resistors for the overall circuit operation.
In the implementation, the resistor R3, the resistor R4, the high-voltage capacitor C1 and the diode D1 form an FCD absorption circuit.
In practical implementation, the resistor R10, the resistor R11, the resistor R12, the zener diode ZD1, the diode D2, the triode Q4, the capacitor C5, and the electrolytic capacitor EC2 form a current and voltage compensation circuit.
When the circuit is used, the circuit is an isolated constant-current constant-voltage isolated LED drive control circuit, and an instantaneous surge pulse protection circuit is formed by a safety resistor FR1, a safety capacitor CX1 and a voltage dependent resistor ZR 1; an AC-DC energy conversion circuit is formed by the rectifier bridge DB1 and the electrolytic capacitor EC1 and provides working energy for a rear-stage circuit, and an energy conversion circuit is formed by the transformer winding T1/A, the electrolytic capacitor EC3, the freewheeling diode D3 and the power output device MOS tube Q1 and provides energy for the LED lamp bead string; a triode Q2, a triode Q3, a resistor R7, a resistor R5, a transformer winding T1/B, a capacitor C3 and a capacitor C2 form a self-excited switch oscillation circuit; the resistor R8, the resistor RS1 and the resistor RS2 form a current sampling circuit to determine the magnitude of output current; the resistor R1 and the resistor R2 are power supply resistors for the whole circuit to work, the resistor R3, the resistor R4, the high-voltage capacitor C1 and the diode D1 form an FCD absorption circuit, the resistor R10, the resistor R11, the resistor R12, the zener diode ZD1, the diode D2, the triode Q4, the capacitor C5 and the capacitor EC2 form a current and voltage compensation circuit, and when the voltage of the commercial power drops to a certain set value, the circuit is opened to work, so that the stability of the circuit is enhanced;
the circuit is simple in structure, elements used in the circuit are conventional devices, the circuit is easy to purchase and produce, the circuit is easy to debug, the cost is low, TL431 and an optocoupler feedback loop are saved compared with an IC scheme on the market, the cost can be saved by about 20%, an MOS (metal oxide semiconductor) tube is used as a power device, the internal resistance is small, the conversion efficiency is high, the working temperature is low, the low-voltage automatic compensation is realized, the constant-current precision is higher, the load voltage detection and adjustment rate is high, and the circuit is a safer and more perfect protection circuit.
Although embodiments of the present invention have been shown and described, it is understood that the scope of the present invention is not limited thereto, and that various changes, modifications, substitutions and alterations can be made herein without departing from the spirit and scope of the utility model.
Claims (9)
1. A wide voltage CCCV isolation LED drive control circuit comprises a rectifier bridge DB1 and is characterized in that: the third wiring end of rectifier bridge DB is connected with piezoresistor ZR and safety regulation electric capacity CX, the second wiring end of rectifier bridge DB is connected with safety resistor FR, the other ends of piezoresistor ZR and safety regulation electric capacity CX are all connected with the second wiring end of rectifier bridge DB, the first wiring end of rectifier bridge DB is connected with electrolytic capacitor EC, the both ends of electrolytic capacitor EC are connected with resistance R and resistance R respectively, the one end of resistance R and resistance R is connected with resistance R, resistance R and the one end of resistance R are all connected with triode Q, the one end of triode Q is connected with electric capacity C, the other end of triode Q is connected with triode Q, the one end of triode Q is connected with resistance R, triode Q and electric capacity C respectively, the one end of resistance R is connected with resistance RS and resistance RS, the one end of resistance RS is connected with zener diode ZD, the other end of the resistor RS2 is connected with a power output device MOS tube Q1, one end of the power output device MOS tube Q1 is connected with a resistor R6, one end of the voltage stabilizing diode ZD1 is connected with an electrolytic capacitor EC2, one end of the electrolytic capacitor EC2 is connected with a transformer winding T1/B and a diode D2 respectively, one end of the diode D2 is connected with a capacitor C3, one end of the capacitor C3 is connected with a resistor R5, one end of the resistor R5 is connected with a capacitor C2, one end of the capacitor C2 is connected with a resistor R2, one end of the resistor R2 is connected with a resistor R1, one end of the resistor R1 is connected with a capacitor C1, one end of the capacitor C1 is connected with a resistor R4, one end of the resistor R4 is connected with a resistor R3, one end of the resistor R3 is connected with a diode D1, one end of the diode D1 is connected with a power output device MOS tube Q1, the other end of the transformer D1 is connected with a T2/1A, one end of the transformer winding T1/A is connected with the transformer winding T1/B, the other end of the transformer winding T1/A is connected with the transformer winding T1/B, one end of the transformer winding T1/B is connected with a freewheeling diode D3 and an electrolytic capacitor EC3, one end of the electrolytic capacitor EC3 is connected with a resistor R9, and one end of the resistor R9 is connected with an LED lamp bead.
2. The wide voltage CCCV isolated LED drive control circuit of claim 1, wherein: the safety resistor FR1, the safety capacitor CX1 and the voltage dependent resistor ZR1 form an instantaneous surge pulse protection circuit.
3. The wide voltage CCCV isolated LED drive control circuit of claim 1, wherein: the rectifier bridge DB1 and the electrolytic capacitor EC1 form an AC-to-DC energy conversion circuit to provide working energy for a post-stage circuit.
4. The wide voltage CCCV isolated LED drive control circuit of claim 1, wherein: the transformer winding T1/A, the electrolytic capacitor EC3, the freewheeling diode D3 and the power output device MOS tube Q1 form an energy conversion circuit to provide energy for the LED lamp bead string.
5. The wide voltage CCCV isolated LED drive control circuit of claim 1, wherein: and the triode Q2, the triode Q3, the resistor R7, the resistor R5, the transformer winding T1/B, the capacitor C3 and the capacitor C2 form a self-excited switch oscillation circuit.
6. The wide voltage CCCV isolated LED drive control circuit of claim 1, wherein: the resistor R8, the resistor RS1 and the resistor RS2 form a current sampling circuit, and the size of the output current is determined.
7. The wide voltage CCCV isolated LED drive control circuit of claim 1, wherein: the resistor R1 and the resistor R2 are power supply resistors for the whole circuit to work.
8. The wide voltage CCCV isolated LED drive control circuit of claim 1, wherein: the resistor R3, the resistor R4, the high-voltage capacitor C1 and the diode D1 form an FCD absorption circuit.
9. The wide voltage CCCV isolated LED drive control circuit of claim 1, wherein: the resistor R10, the resistor R11, the resistor R12, the zener diode ZD1, the diode D2, the triode Q4, the capacitor C5 and the electrolytic capacitor EC2 form a current and voltage compensation circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121243931.6U CN215682694U (en) | 2021-06-04 | 2021-06-04 | Wide-voltage CCCV (capacitor-voltage) isolation LED (light-emitting diode) drive control circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121243931.6U CN215682694U (en) | 2021-06-04 | 2021-06-04 | Wide-voltage CCCV (capacitor-voltage) isolation LED (light-emitting diode) drive control circuit |
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| CN215682694U true CN215682694U (en) | 2022-01-28 |
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| CN202121243931.6U Active CN215682694U (en) | 2021-06-04 | 2021-06-04 | Wide-voltage CCCV (capacitor-voltage) isolation LED (light-emitting diode) drive control circuit |
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