CN214413084U - Synchronous rectification control circuit - Google Patents
Synchronous rectification control circuit Download PDFInfo
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- CN214413084U CN214413084U CN202120791197.0U CN202120791197U CN214413084U CN 214413084 U CN214413084 U CN 214413084U CN 202120791197 U CN202120791197 U CN 202120791197U CN 214413084 U CN214413084 U CN 214413084U
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Abstract
The application relates to a synchronous rectification control circuit, which comprises a light illumination detection circuit, a processing circuit and a synchronous rectification control module, wherein the input end of the synchronous rectification control module is electrically connected with a mains supply, and the output end of the synchronous rectification control module is electrically connected with an LED lamp; the illumination detection circuit is electrically connected with the processing circuit and is used for detecting the outdoor illumination condition; the processing circuit is coupled between the synchronous rectification control module and the LED lamp and used for controlling the synchronous rectification control module to supply power or stop supplying power to the LED lamp according to illumination. The synchronous rectification control circuit has the effect of being convenient for control.
Description
Technical Field
The present application relates to the field of control circuits, and more particularly, to synchronous rectification control circuits.
Background
Synchronous rectification is a new technology that uses a special power MOSFET with extremely low on-state resistance to replace a rectifier diode to reduce the rectification loss. It can greatly improve the efficiency of the DC/DC converter and has no dead zone voltage caused by Schottky barrier voltage.
In the related art, the synchronous rectification control circuit comprises a synchronous rectification control module and a switch, wherein an input end of the synchronous rectification control module is electrically connected with a mains supply, an output end of the synchronous rectification control module is electrically connected with the LED lamp, and the switch is electrically connected between the input end of the LED lamp and an anode output end of the synchronous rectification control module and used for controlling the circuit to be switched on or off.
In view of the above-mentioned related art, the inventor believes that the synchronous rectification control circuit described above requires a user to approach a switch and manually control, which causes a drawback that the synchronous rectification control circuit is not easily controlled.
SUMMERY OF THE UTILITY MODEL
In order to facilitate control of the synchronous rectification control circuit, the present application provides a synchronous rectification control circuit.
The application provides a synchronous rectification control circuit, adopts following technical scheme:
the synchronous rectification control circuit comprises an illumination detection circuit, a processing circuit and a synchronous rectification control module, wherein the input end of the synchronous rectification control module is electrically connected with mains supply, and the output end of the synchronous rectification control module is electrically connected with the LED lamp;
the illumination detection circuit is electrically connected with the processing circuit and is used for detecting the outdoor illumination condition;
the processing circuit is coupled between the synchronous rectification control module and the LED lamp and used for controlling the synchronous rectification control module to supply power or stop supplying power to the LED lamp according to illumination.
Through adopting above-mentioned technical scheme, illumination detection circuitry sends different signal of telecommunication to processing circuit according to outdoor illumination condition, and processing circuit handles according to the signal of telecommunication of difference, and control synchronous rectification control module is to the power supply of LED lamp or stop the power supply, and then realizes the synchronous rectification control circuit of automatic control to be convenient for control synchronous rectification control circuit.
Optionally, the illumination detection circuit includes a photo resistor RG, a resistor R1, a resistor R2, a resistor R3, a resistor R4, and a voltage comparator N1, an input terminal of the photo resistor RG is electrically connected to a power source VCC, and an output terminal of the photo resistor RG is electrically connected to a positive input terminal of the voltage comparator N1;
the input end of the resistor R1 is electrically connected between the output end of the photosensitive resistor RG and the positive input end of the voltage comparator N1, and the output end of the resistor R1 is grounded;
the input end of the resistor R3 is electrically connected with a power supply VCC, the output end of the resistor R3 is electrically connected with the input end of the resistor R4, and the output end of the resistor R4 is grounded;
the input end of the resistor R2 is electrically connected between the output end of the resistor R3 and the input end of the resistor R4, and the output end of the resistor R2 is electrically connected with the negative input end of the voltage comparator N1;
the output end of the voltage comparator N1 is electrically connected with the processing circuit.
By adopting the technical scheme, when outdoor illumination is reduced, the resistance value of the photosensitive resistor RG is increased, so that the output end of the voltage comparator N1 outputs a high level, the high level drives the processing circuit to be conducted, and the synchronous rectification control module is controlled to supply power to the LED lamp; when outdoor illumination risees, photoresistor RG resistance diminishes for voltage comparator N1 output low level, processing circuit disconnection, and then make the LED lamp close, thereby be convenient for control synchronous rectification control circuit.
Optionally, the processing circuit includes a light emitting diode D1, a time relay KT1, and an NPN triode Q1, an input terminal of the light emitting diode D1 is electrically connected to the power VCC, and an output terminal of the light emitting diode D1 is electrically connected to an input terminal of the time relay KT 1;
the output end of the time relay KT1 is electrically connected with the collector of an NPN triode Q1, the first common end of the time relay KT1 is electrically connected with the positive electrode output end of the synchronous rectification control module, and the first normally open contact of the time relay KT1 is electrically connected with the input end of the LED lamp;
the base of the NPN triode Q1 is electrically connected to the output terminal of the voltage comparator N1, and the emitter of the NPN triode Q1 is grounded.
By adopting the technical scheme, when the output end of the voltage comparator N1 outputs a high level, the NPN triode Q1 is conducted, so that the light emitting diode D1 is conducted and emits light, the LED lamp is prompted to be turned on by a user and normal work of the illumination detection circuit and the processing circuit is prompted to the user, the time relay KT1 is powered on, and the synchronous rectification control module is controlled to supply power to the LED lamp after time delay; when the output end of the voltage comparator N1 outputs a low level, the NPN triode Q1 is cut off, so that the light emitting diode D1 is cut off, the synchronous rectification control module stops supplying power to the LED lamp, and the synchronous rectification control circuit is convenient to control.
Optionally, the second public end and the power VCC electric connection of time relay KT1, the second normally open contact electric connection of time relay KT1 has the suggestion circuit of turning on the light for indicate that user's LED lamp is in the on-state.
Through adopting above-mentioned technical scheme, time relay KT1 during operation makes the suggestion circuit of turning on light normally work to be convenient for indicate user LED lamp and be in the on-state.
Optionally, the light-on prompt circuit includes an intermediate relay KM1, a transmitter and a receiving circuit, an input end of the intermediate relay KM1 is electrically connected with a second normally-open contact of the time relay KT1, and an output end of the intermediate relay KM1 is grounded;
the common end of the intermediate relay KM1 is electrically connected with the positive electrode of a power supply VDD, the normally open contact of the intermediate relay KM1 is electrically connected with the input end of a transmitter, the output end of the transmitter is electrically connected with the negative electrode of the power supply VDD, and the transmitter is used for transmitting information to a receiving circuit;
the input end of the receiving circuit is electrically connected with the power VCC, the output end of the receiving circuit is grounded, and the receiving circuit is used for receiving information and prompting a user.
Through adopting above-mentioned technical scheme, time relay KT1 normal during operation, auxiliary relay KM1 gets electric and makes the transmitter work normally, sends information to receiving circuit for receiving circuit normal work, thereby be convenient for the suggestion user.
Optionally, the receiving circuit includes a receiver, a resistor R5, and a vibrator, an input terminal of the receiver is electrically connected to the VCC, an output terminal of the receiver is electrically connected to an input terminal of the resistor R5, an output terminal of the R5 is electrically connected to an input terminal of the vibrator, and an output terminal of the vibrator is grounded;
the receiver is used for receiving information from the transmitter and is used for switching on or off the receiving circuit.
By adopting the technical scheme, after the receiver receives the information from the transmitter, the circuit is switched on, so that the vibrator is electrified, and the vibrator prompts a user through vibration, thereby prompting more effectively.
Optionally, the type of the light-sensitive resistor RG is GL 3516.
By adopting the technical scheme, the sensitivity is favorably improved, and the cost is saved.
Optionally, the model of the intermediate relay KM1 is HTL-2H.
By adopting the technical scheme, the service life of the circuit is prolonged, and the power consumption is reduced.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the illumination detection circuit sends different electric signals to the processing circuit according to outdoor illumination conditions, the processing circuit processes the electric signals according to the different electric signals, and the synchronous rectification control module is controlled to supply power or stop supplying power to the LED lamp, so that the automatic control synchronous rectification control circuit is realized, and the synchronous rectification control circuit is convenient to control.
2. When the output end of the voltage comparator N1 outputs a high level, the NPN triode Q1 is conducted, so that the light emitting diode D1 is conducted and emits light, the LED lamp is prompted to be turned on by a user and the illumination detection circuit and the processing circuit of the user are prompted to work normally, the time relay KT1 is electrified, and the synchronous rectification control module is controlled to supply power to the LED lamp after time delay; when the output end of the voltage comparator N1 outputs a low level, the NPN triode Q1 is cut off, so that the light emitting diode D1 is cut off, the synchronous rectification control module stops supplying power to the LED lamp, and the synchronous rectification control circuit is convenient to control.
3. After the receiver receives the information from the transmitter, the circuit is switched on, so that the vibrator is electrified, and the vibrator prompts a user through vibration, thereby enabling prompt to be more effective.
Drawings
Fig. 1 is a schematic circuit connection diagram of the illumination detection circuit, the processing circuit and the synchronous rectification control module in the embodiment.
Fig. 2 is a specific circuit diagram of the turn-on prompt circuit in the present embodiment.
Description of reference numerals: 1. an illumination detection circuit; 2. a processing circuit; 3. a synchronous rectification control module; 4. a light-on prompt circuit; 41. a receiving circuit.
Detailed Description
The present application is described in further detail below with reference to figures 1-2.
The embodiment of the application discloses a synchronous rectification control circuit. Referring to fig. 1, the synchronous rectification control circuit includes an illumination detection circuit 1, a processing circuit 2 and a synchronous rectification control module 3, an input end of the synchronous rectification control module 3 is electrically connected to a mains supply, and an output end of the synchronous rectification control module 3 is electrically connected to an LED lamp. Illumination detection circuitry 1 and processing circuit 2 electric connection, illumination detection circuitry 1 is used for detecting outdoor illumination condition, transmits different signals of telecommunication to processing circuit 2 according to outdoor illumination degree. The processing circuit 2 is coupled between the synchronous rectification control module 3 and the LED lamp, and the processing circuit 2 controls the synchronous rectification control module 3 according to different electrical signals, so that the synchronous rectification control module 3 supplies power to the LED lamp or stops supplying power.
Referring to fig. 1, the illumination detection circuit 1 includes a photo resistor RG, a resistor R1, a resistor R2, a resistor R3, a resistor R4, and a voltage comparator N1, wherein an anode input terminal of the voltage comparator N1 is electrically connected to an output terminal of the photo resistor RG, and an input terminal of the photo resistor RG is electrically connected to a power source VCC. The input terminal of the resistor R1 is electrically connected to the output terminal of the photo-resistor RG and the positive input terminal of the voltage comparator N1, and the output terminal of the resistor R1 is grounded. The negative input end of the voltage comparator N1 is electrically connected with the output end of the resistor R2, the input end of the resistor R2 is electrically connected with the output end of the resistor R3 and the input end of the resistor R4, the input end of the resistor R3 is electrically connected with a power supply VCC, and the output end of the resistor R4 is grounded. The output terminal of the voltage comparator N1 is electrically connected to the processing circuit 2. The type of the photosensitive resistor RG is GL3516, which is beneficial to improving the sensitivity and saving the cost.
Referring to fig. 1, when outdoor illumination is reduced, the resistance value of the photoresistor RG is increased, so that the voltage at the positive input end of the voltage comparator N1 is increased, when the voltage at the positive input end of the voltage comparator N1 is greater than the voltage at the negative input end, the output end of the voltage comparator N1 outputs a high level, and the high level drives the processing circuit 2 to be turned on, so as to control the synchronous rectification control module 3 to supply power to the LED lamp; when the outdoor illumination rises, the resistance value of the photosensitive resistor RG is reduced, so that the voltage of the positive input end of the voltage comparator N1 is reduced, when the voltage of the positive input end of the voltage comparator N1 is smaller than the voltage of the negative input end, the output end of the voltage comparator N1 outputs a low level to drive the processing circuit 2 to be disconnected, and further the LED lamp is turned off, so that the synchronous rectification control circuit is convenient to control.
Referring to fig. 1, the processing circuit 2 includes a light emitting diode D1, a time relay KT1, and an NPN transistor Q1, wherein a base of the NPN transistor Q1 is electrically connected to an output terminal of the voltage comparator N1, an emitter of the NPN transistor Q1 is grounded, and a collector of the NPN transistor Q1 is electrically connected to an output terminal of the time relay KT 1. The input end of the time relay KT1 is electrically connected with the output end of the light emitting diode D1, the first public end of the time relay KT1 is electrically connected with the positive electrode output end of the synchronous rectification control module 3, and the first normally open contact of the time relay KT1 is electrically connected with the input end of the LED lamp. The input terminal of the led D1 is electrically connected to the power VCC.
Referring to fig. 1, when the output end of the voltage comparator N1 outputs a high level, the NPN transistor Q1 is turned on, so that the light emitting diode D1 is turned on and emits light, the time relay KT1 is powered on, and the synchronous rectification control module 3 is controlled to supply power to the LED lamp after time delay; when the output end of the voltage comparator N1 outputs a low level, the NPN transistor Q1 is turned off, so that the light emitting diode D1 is turned off, and the synchronous rectification control module 3 stops supplying power to the LED lamp.
Referring to fig. 1 and 2, in order to prompt the user to turn on or off the LED lamp more quickly, the second common terminal of the time relay KT1 is electrically connected to the power VCC, and the second normally open contact of the time relay KT1 is electrically connected to the light-on prompt circuit 4.
Referring to fig. 1 and 2, the light-on prompt circuit 4 includes an intermediate relay KM1, a transmitter and a receiving circuit 41, an input terminal of the intermediate relay KM1 is electrically connected to the second normally open contact of the time relay KT1, and an output terminal of the intermediate relay KM1 is grounded. The common end of the intermediate relay KM1 is electrically connected with the positive pole of a power supply VDD, the normally open contact of the intermediate relay KM1 is electrically connected with the input end of the transmitter, the output end of the transmitter is electrically connected with the negative pole of the power supply VDD, and the transmitter is used for transmitting information to the receiving circuit 41. The input terminal of the receiving circuit 41 is electrically connected to the power VCC, the output terminal of the receiving circuit 41 is grounded, and the receiving circuit 41 is configured to receive information and prompt a user. The intermediate relay KM1 is HTL-2H. The service life of the circuit is prolonged, and the power consumption is reduced.
Referring to fig. 2, the receiving circuit 41 includes a receiver, a resistor R5, and a vibrator, wherein an input terminal of the receiver is electrically connected to the power VCC, an output terminal of the receiver is electrically connected to an input terminal of the resistor R5, an output terminal of the R5 is electrically connected to an input terminal of the vibrator, an output terminal of the vibrator is grounded, and the receiver is configured to receive information from the transmitter. And after the receiver receives the information from the transmitter, the circuit is switched on, so that the vibrator is electrified, and the vibrator prompts a user through vibration.
The implementation principle of the synchronous rectification control circuit in the embodiment of the application is as follows: the photoresistor RG is influenced by outdoor illumination, when the outdoor illumination degree is higher, the resistance value of the photoresistor RG is reduced, so that the voltage of the positive input end of the voltage comparator N1 is smaller than that of the negative input end, the output end of the voltage comparator N1 outputs low level, the NPN triode Q1 is in a cut-off state, the processing circuit 2 is disconnected, the time relay KT1 does not work, and the synchronous rectification control module 3 does not supply power to the LED lamp; when the outdoor illumination degree is low, the resistance value of the photosensitive resistor RG is increased, so that the voltage of the positive input end of the voltage comparator N1 is larger than that of the negative input end, the output end of the voltage comparator N1 outputs a high level at the moment, the NPN triode Q1 is conducted, the processing circuit 2 is conducted, the time relay KT1 works normally, the light emitting diode D1 emits light, the vibrator reminds a user through vibration, and the synchronous rectification control module 3 supplies power to the LED lamp.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. Synchronous rectification control circuit, its characterized in that: the LED lamp illumination control system comprises an illumination detection circuit (1), a processing circuit (2) and a synchronous rectification control module (3), wherein the input end of the synchronous rectification control module (3) is electrically connected with mains supply, and the output end of the synchronous rectification control module (3) is electrically connected with an LED lamp;
the illumination detection circuit (1) is electrically connected with the processing circuit (2), and the illumination detection circuit (1) is used for detecting outdoor illumination conditions;
the processing circuit (2) is coupled between the synchronous rectification control module (3) and the LED lamp and used for controlling the synchronous rectification control module (3) to supply power or stop supplying power to the LED lamp according to illumination.
2. The synchronous rectification control circuit of claim 1, wherein: the illumination detection circuit (1) comprises a photoresistor RG, a resistor R1, a resistor R2, a resistor R3, a resistor R4 and a voltage comparator N1, wherein the input end of the photoresistor RG is electrically connected with a power supply VCC, and the output end of the photoresistor RG is electrically connected with the positive input end of the voltage comparator N1;
the input end of the resistor R1 is electrically connected between the output end of the photosensitive resistor RG and the positive input end of the voltage comparator N1, and the output end of the resistor R1 is grounded;
the input end of the resistor R3 is electrically connected with a power supply VCC, the output end of the resistor R3 is electrically connected with the input end of the resistor R4, and the output end of the resistor R4 is grounded;
the input end of the resistor R2 is electrically connected between the output end of the resistor R3 and the input end of the resistor R4, and the output end of the resistor R2 is electrically connected with the negative input end of the voltage comparator N1;
the output end of the voltage comparator N1 is electrically connected with the processing circuit (2).
3. The synchronous rectification control circuit of claim 2, wherein: the processing circuit (2) comprises a light emitting diode D1, a time relay KT1 and an NPN triode Q1, wherein the input end of the light emitting diode D1 is electrically connected with a power supply VCC, and the output end of the light emitting diode D1 is electrically connected with the input end of the time relay KT 1;
the output end of the time relay KT1 is electrically connected with the collector of an NPN triode Q1, the first common end of the time relay KT1 is electrically connected with the positive electrode output end of the synchronous rectification control module (3), and the first normally-open contact of the time relay KT1 is electrically connected with the input end of the LED lamp;
the base of the NPN triode Q1 is electrically connected to the output terminal of the voltage comparator N1, and the emitter of the NPN triode Q1 is grounded.
4. The synchronous rectification control circuit of claim 3, wherein: time relay KT 1's second common port and power VCC electric connection, time relay KT 1's second normally open contact electric connection has open lamp suggestion circuit (4) for it is in the on-state to indicate user LED lamp.
5. The synchronous rectification control circuit of claim 4, wherein: the light-on prompt circuit (4) comprises an intermediate relay KM1, a transmitter and a receiving circuit (41), wherein the input end of the intermediate relay KM1 is electrically connected with a second normally-open contact of a time relay KT1, and the output end of the intermediate relay KM1 is grounded;
the common end of the intermediate relay KM1 is electrically connected with the positive electrode of a power supply VDD, the normally open contact of the intermediate relay KM1 is electrically connected with the input end of a transmitter, the output end of the transmitter is electrically connected with the negative electrode of the power supply VDD, and the transmitter is used for transmitting information to a receiving circuit (41);
the input end of the receiving circuit (41) is electrically connected with a power supply VCC, the output end of the receiving circuit (41) is grounded, and the receiving circuit (41) is used for receiving information and prompting a user.
6. The synchronous rectification control circuit of claim 5, wherein: the receiving circuit (41) comprises a receiver, a resistor R5 and a vibrator, wherein the input end of the receiver is electrically connected with a power supply VCC, the output end of the receiver is electrically connected with the input end of a resistor R5, the output end of the R5 is electrically connected with the input end of the vibrator, and the output end of the vibrator is grounded;
the receiver is arranged to receive information from the transmitter for switching the receiving circuit (41) on or off.
7. The synchronous rectification control circuit of claim 2, wherein: the type of the photoresistor RG is GL 3516.
8. The synchronous rectification control circuit of claim 5, wherein: the model of the intermediate relay KM1 is HTL-2H.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120791197.0U CN214413084U (en) | 2021-04-16 | 2021-04-16 | Synchronous rectification control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120791197.0U CN214413084U (en) | 2021-04-16 | 2021-04-16 | Synchronous rectification control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214413084U true CN214413084U (en) | 2021-10-15 |
Family
ID=78031849
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120791197.0U Active CN214413084U (en) | 2021-04-16 | 2021-04-16 | Synchronous rectification control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214413084U (en) |
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2021
- 2021-04-16 CN CN202120791197.0U patent/CN214413084U/en active Active
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