CN217389060U - Driving power supply and lamp - Google Patents
Driving power supply and lamp Download PDFInfo
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- CN217389060U CN217389060U CN202123008688.2U CN202123008688U CN217389060U CN 217389060 U CN217389060 U CN 217389060U CN 202123008688 U CN202123008688 U CN 202123008688U CN 217389060 U CN217389060 U CN 217389060U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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Abstract
The utility model relates to a drive power supply and lamps and lanterns, include: the power output unit, the voltage detection unit, the reference unit, the comparison unit, the driving unit, the switch unit and the power output end; the power output unit comprises a first positive output end and a first negative output end, and the power output end comprises a second positive output end and a second negative output end; the first positive output end and the negative output end are respectively connected with a second positive output end and a second negative output end through a switch unit, and the switch unit is connected with the driving unit and used for receiving a driving level output by the driving unit so as to be switched on or switched off; the voltage detection unit is connected with the power output unit and outputs a detection level; the reference unit outputs a reference level; the comparison unit is connected with the voltage detection unit and the reference unit and outputs a comparison result; the driving unit is connected with the comparison unit and outputs a driving level. Implement the utility model discloses can improve the drive power supply reliability.
Description
Technical Field
The utility model relates to a LED power technical field, more specifically say, relate to a drive power supply and lamps and lanterns.
Background
The LED lighting has the unique advantages of high efficiency, energy conservation, environmental protection, long service life and the like, and is gradually replacing the traditional lighting at present. In recent years, non-isolated driving power supplies have been widely used in the field of LED lighting due to their advantages of low cost, high efficiency, etc., however, non-isolated power supplies have limited their application range due to their safety issues. Therefore, the safety problem in the application of the non-isolated power supply is solved, and the method has important significance for popularization and reliability of the non-isolated power supply.
At present, the output protection of a non-isolated power supply scheme is realized by depending on the self-contained OVP function of a power supply IC, and when the power supply works normally, the function can well protect the power supply and an LED lamp. However, the input end and the output end of the non-isolated power supply are directly connected together electrically, and once the power supply is damaged due to abnormal reasons and the power device fails, the high voltage (including the PFC part) of the input end is directly applied to the two ends of the LED lamp, so that the lamp is damaged.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in that, a drive power supply and lamps and lanterns are provided.
The utility model provides a technical scheme that its technical problem adopted is: constructing a drive power supply, comprising: the power output unit is used for connecting alternating current input and performing power conversion, and the voltage detection unit, the reference unit, the comparison unit, the driving unit, the switch unit and the power output end are used for connecting the alternating current input and performing power conversion;
the power output unit comprises a first positive output end and a first negative output end, and the power output end comprises a second positive output end and a second negative output end;
the first positive output end is connected with the second positive output end through the switch unit, the first negative output end is connected with the second negative output end through the switch unit, and the switch unit is connected with the driving unit and used for receiving a driving level output by the driving unit to be switched on or switched off;
the voltage detection unit is connected with the power output unit and used for outputting a detection level corresponding to the power output unit;
the reference unit is used for outputting a reference level;
the comparison unit is connected with the voltage detection unit and the reference unit and used for receiving the detection level and the reference level and outputting a comparison result;
the driving unit is connected with the comparison unit and used for outputting the driving level according to the comparison result.
Preferably, in the driving power supply of the present invention, the switching unit includes a relay K1, a diode D1, a resistor R11, and a capacitor C4;
a first end of the coil of the relay K1 is connected to the driving unit, an anode of the diode D1 and a first end of the capacitor C4, a second end of the coil of the relay K1 is connected to a cathode of the diode D1, a second end of the capacitor C4 and a first end of the resistor R11, and a second end of the resistor R11 is used for connecting a power supply voltage; the first end of relay K1 first contact is connected the first positive output, the second end of relay K1 first contact is connected the second positive output, the first end of relay K1 second contact is connected the first negative output, the second end of relay K1 second contact is connected the second negative output.
In the driving power supply of the present invention, the driving unit includes a switching tube, a resistor R9, and a resistor R10;
the first end of switch tube is connected the first end of relay K1 coil, the second end of switch tube is connected the first negative output, the third end of switch tube is connected the first end of resistance R9 with the first end of resistance R10, the second end of resistance R9 is connected the output of comparator cell, the second end of resistance R10 is connected the first negative output.
The utility model discloses an among the drive power supply, the switch tube includes MOS pipe Q1, MOS pipe Q1's grid is connected resistance R9's first end with resistance R10's first end, MOS pipe Q1's source electrode is connected first negative pole input, MOS pipe's drain electrode is connected the first end of relay K1 coil.
In the driving power supply of the present invention, the comparing unit includes an operational amplifier U1 and a resistor R6;
the inverting input end of the operational amplifier U1 is connected with the voltage detection unit and the first end of the resistor R6, the homodromous input end of the operational amplifier U1 is connected with the reference unit, and the output end of the operational amplifier U1 is connected with the second end of the resistor R6 and the driving unit.
In the driving power supply of the present invention, the voltage detection unit includes a first resistor, a second resistor, and a capacitor C1;
the first end of the first resistor is connected with the first positive output end, the second end of the first resistor is connected with the first end of the second resistor, the first end of the capacitor C1 and the inverting input end of the operational amplifier U1, and the second end of the second resistor and the second end of the capacitor C1 are connected with the first negative output end.
In the driving power supply of the present invention, the first resistor includes a plurality of series-connected resistors; and/or the second resistance comprises a plurality of resistances connected in parallel.
In the driving power supply of the present invention, the reference unit includes a resistor R7, a resistor R8, and a capacitor C2;
the first end of the resistor R7 is connected with the first end of the resistor R8, the first end of the capacitor C2 and the equidirectional input end of the operational amplifier U1, the second end of the resistor R7 is used for inputting a power supply voltage, and the second end of the resistor R8 and the second end of the capacitor C2 are connected with the first negative output end.
The utility model discloses an among the drive power supply, power output unit includes the PFC circuit, first positive output with first negative pole output is connected respectively the output of PFC circuit.
The present invention also provides a lamp including the driving power supply according to any one of the above aspects.
Implement the utility model discloses a driving power supply and lamps and lanterns has following beneficial effect: the problems that the LED lamp is damaged by high voltage, personnel safety is endangered and the like when abnormality such as power supply damage occurs can be avoided, and the reliability of the driving power supply is improved.
Drawings
The invention will be further explained with reference to the drawings and examples, wherein:
fig. 1 is a schematic structural diagram of a driving power supply of the present invention;
fig. 2 is a schematic circuit diagram of an embodiment of the present invention.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1, in a first embodiment of a driving power supply of the present invention, the driving power supply includes: a power output unit 110 for connecting an ac input and performing power conversion, and a voltage detection unit 140, a reference unit 150, a comparison unit 160, a driving unit 120, a switching unit 120, and a power output terminal 130; the power output unit 110 includes a first positive output terminal and a first negative output terminal, and the power output terminal 130 includes a second positive output terminal and a second negative output terminal; the first positive output end is connected to the second positive output end through the switch unit 120, and the first negative output end is connected to the second negative output end through the switch unit 120, wherein the switch unit 120 is connected to the driving unit 120 and configured to receive a driving level output by the driving unit 120 to turn on or off; the voltage detection unit 140 is connected to the power output unit 110, and is configured to output a detection level corresponding to the power output unit 110; the reference unit 150 is used to output a reference level; the comparing unit 160 is connected to the voltage detecting unit 140 and the reference unit 150, and is configured to receive the detection level and the reference level and output a comparison result; the driving unit 120 is connected to the comparing unit 160 for outputting a driving level according to the comparison result. Specifically, the power output unit 110 is used for performing power conversion on an ac input to provide a power output, the power output unit 110 is connected to the power output terminal 130 through the switch unit 120, and the power output terminal 130 is used for supplying power to a subsequent stage operating circuit, such as an LED operating circuit. The power output unit 110 includes a first positive output terminal and a second negative output terminal, which can be correspondingly connected to the second positive output terminal and the second negative output terminal of the power output terminal 130 through the switch unit 120. The voltage detection unit 140 is connected to the power output unit 110, and detects an output voltage of the power output unit 110 and outputs a corresponding detection result. The comparing unit 160 is connected to the voltage detecting unit 140 and a reference unit 150, compares the error detection result output by the voltage detecting unit 140 with the reference level output by the reference unit 150, and outputs a corresponding comparison result. The driving unit 120 is connected to the comparing unit 160, and generates a corresponding driving level according to the comparison result output by the comparing unit 160. The switching unit 120 may be turned on or off according to the driving level. When the switch unit 120 is turned on, the power output of the power output unit 110 may be input to the second positive output terminal and the second negative output terminal of the power output terminal 130 through the first positive output terminal and the first negative output terminal to supply power to the subsequent circuits such as the LED working circuit, and when the switch unit 120 is turned off, the power output unit 110 may be directly turned off to supply power to the subsequent circuits. According to the circuit, when the output voltage of the power output unit 110 is too high, the comparison unit 160 outputs a corresponding comparison result to finally turn off the switch unit 120, so that the protection of a post-stage circuit such as an LED working circuit can be realized.
Alternatively, as shown in fig. 2, the switching unit 120 includes a relay K1, a diode D1, a resistor R11, and a capacitor C4; a first end of a coil of the relay K1 is connected with the driving unit 120, an anode of the diode D1 and a first end of the capacitor C4, a second end of a coil of the relay K1 is connected with a cathode of the diode D1, a second end of the capacitor C4 and a first end of the resistor R11, and a second end of the resistor R11 is used for connecting a power supply voltage; the first end of relay K1 first contact is connected first positive output, and the second of relay K1 first contact is connected the second positive output, and the first end of relay K1 second contact is connected first negative output, and the second of relay K1 second contact is connected the second negative output. Specifically, the switch unit 120 may be composed of a relay K1 and its peripheral circuit, wherein the relay K1 is a two-contact relay, wherein a coil controls two contacts of the relay to be turned on or off simultaneously. One end of the coil of the relay K1 is connected to the power input, and the other end is connected to the driving unit 120, so that the coil is driven to be powered on or powered off by the driving unit 120. When the coil of the relay K1 is powered, the double contacts of the relay K1 act simultaneously, for example, are switched on, and when the coil of the relay K1 is powered off, the double contacts of the relay K1 act simultaneously, for example, are switched off. Two ends of a coil of the relay K1 are respectively connected with the diode D1 and the capacitor C4, and the energy on the coil of the relay K1 is released to ensure the safety of a circuit. The first positive output terminal VO + and the first negative output terminal VO-of the power output unit 110 are connected to the second positive output terminal VOUT + and the second negative output terminal VOUT-of the power output terminal through the double contacts of the relay K1, respectively. In an embodiment, the switch unit 120 may also be constructed by using a MOS transistor, a thyristor, or other switching devices.
Optionally, the driving unit 120 includes a switching tube, a resistor R9 and a resistor R10; the first end of switch tube is connected the first end of relay K1 coil, and the second end of switch tube is connected first negative output, and the third end connection resistance R9's first end and the first end of resistance R10 of switch tube, the output of comparing element 160 is connected to the second end of resistance R9, and the first negative output is connected to the second end of resistance R10. Specifically, in the driving unit 120, the switching tube is controlled to be turned on or off according to the comparison result of the driving unit 120. For example, when the comparison result is a high level, the high level generates a voltage through the voltage division effect of the resistor R9 and the resistor R10 to drive the switch tube to be turned on, the first end of the coil of the relay K1 is pulled low, and the coil of the relay K1 is powered on. When the comparison result is low level, the third end of the switch tube is low voltage, the switch tube is turned off at the moment, the first end of the coil of the relay K1 is high level, and the coil of the relay K1 is powered off at the moment.
Optionally, the switching tube includes a MOS transistor Q1, a gate of the MOS transistor Q1 is connected to the first end of the resistor R9 and the first end of the resistor R10, a source of the MOS transistor Q1 is connected to the first negative input terminal, and a drain of the MOS transistor is connected to the first end of the coil of the relay K1. Specifically, the switching tube may adopt a MOS transistor Q1, wherein a gate of the MOS transistor Q1 receives a voltage division of the resistor R9 and the resistor R10 to turn on or off.
Optionally, the comparing unit 160 includes an operational amplifier U1 and a resistor R6; an inverting input terminal of the operational amplifier U1 is connected to the voltage detection unit 140 and a first terminal of the resistor R6, a non-inverting input terminal of the operational amplifier U1 is connected to the reference unit 150, and an output terminal of the operational amplifier U1 is connected to a second terminal of the resistor R6 and the driving unit 120. Specifically, the comparison unit 160 may be composed of an operational amplifier U1 and its peripheral circuits. The operational amplifier U1 is powered by a power voltage, and has an output terminal connected to the driving unit 120, a common input terminal connected to the reference unit 150 for obtaining a reference level, and an inverted input terminal connected to the voltage detection unit 140 for obtaining a detection level. The operational amplifier U1 finally outputs a corresponding comparison result based on the reference level and the detection level. In one embodiment, when the power output unit 110 operates normally, the detection level output by the voltage detection unit 140 is lower than the reference level output by the reference unit 150, and the comparison unit 160 formed by the operational amplifier U1 outputs a high level to drive the driving unit 120 to operate. When the power output unit 110 is abnormal, which causes the detection level output by the voltage detection unit 140 to be too high and higher than the reference level output by the reference unit 150, the comparison unit 160 formed by the operational amplifier U1 outputs a low level to drive the driving unit 120 to operate.
Optionally, the voltage detection unit 140 includes a first resistor, a second resistor, and a capacitor C1; the first end of the first resistor is connected with the first positive electrode output end, the second end of the first resistor is connected with the first end of the second resistor, the first end of the capacitor C1 and the inverting input end of the operational amplifier U1, and the second end of the second resistor and the second end of the capacitor C1 are connected with the first negative electrode output end. Specifically, the voltage detection unit 140 may include a first resistor and a second resistor that form a voltage divider circuit, where the first resistor and the second resistor are connected in series and then have one end connected to the first positive output terminal and the other end connected to the first negative output terminal. The voltage division between the first positive output terminal and the first negative output terminal may be applied at the serial connection node of the second resistor of the first resistor, and the voltage division may reflect the output voltage of the power output unit 110, that is, the voltage detection result of the corresponding power output unit 110. And is also connected through a second resistor to a capacitor C1 through which the detection level is filtered. In one embodiment, the first resistor may be a combination of a plurality of resistors, for example, it may be a combination of a plurality of resistors connected in series. As shown in fig. 2, the first resistor includes a resistor R1, a resistor R2, and a resistor R3, and the resistor R1, the resistor R2, and the resistor R3 are connected in series, and then one end of the first resistor is connected to the first positive output terminal, and the other end of the first resistor is connected to the first end of the second resistor. In another embodiment, the second resistor may also be a combination of a plurality of resistors. For example, it may be formed by connecting a plurality of resistors in parallel. As shown in fig. 2, the second resistor includes a resistor R4 and a resistor R5, the resistor R4 and the resistor R5 are connected in parallel, and then one end of the resistor R is connected to the first end of the first resistor, and the other end of the resistor R is connected to the first negative output terminal.
Optionally, the reference unit 150 includes a resistor R7, a resistor R8, and a capacitor C2; the first end of the resistor R7 is connected with the first end of the resistor R8, the first end of the capacitor C2 and the same-direction input end of the operational amplifier U1, the second end of the resistor R7 is used for inputting a power supply voltage, and the second end of the resistor R8 and the second end of the capacitor C2 are connected with the first negative output end. Specifically, the reference unit 150 may include a resistor R7 and a resistor R8 constituting a voltage dividing circuit. The resistor R7 and the resistor R8 are connected in series, one end of the resistor is connected with a power supply voltage, and the other end of the resistor is connected with the first negative electrode end. The power supply voltage is generated at a series connection node of the resistor R7 and the resistor R8 with a divided voltage as a reference voltage input to the operational amplifier U1 to be input to the non-inverting input terminal thereof. A capacitor C2 is connected in parallel with resistor R8 for filtering the reference level.
Optionally, the power output unit 110 includes a PFC circuit, and performs power conversion on the input of the ac power supply through the PFC circuit. The first positive output end and the first negative output end are respectively connected with the output of the PFC circuit. The power output unit 110 may also be other voltage converting circuits for providing a dc output. In an embodiment, the second positive output terminal and the second negative output terminal may further be connected to a voltage conversion circuit. And the output of the second positive output end and the output of the second negative output end are used as the output of the driving power supply after voltage conversion.
The utility model discloses a lamp, including the drive power supply of above arbitrary one. That is, the power output terminal 130 of the driving power supply can be connected to the light-emitting circuit of the lamp, so that the light-emitting circuit of the lamp can be protected when the power supply is abnormal.
It is to be understood that the foregoing examples merely represent preferred embodiments of the present invention, and that the description thereof is more specific and detailed, but not intended to limit the scope of the invention; it should be noted that, for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention; therefore, all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.
Claims (10)
1. A drive power supply, comprising: the power output unit is used for connecting alternating current input and performing power conversion, and the voltage detection unit, the reference unit, the comparison unit, the driving unit, the switch unit and the power output end are used for connecting the alternating current input and performing power conversion;
the power output unit comprises a first positive output end and a first negative output end, and the power output end comprises a second positive output end and a second negative output end;
the first positive output end is connected with the second positive output end through the switch unit, the first negative output end is connected with the second negative output end through the switch unit, and the switch unit is connected with the driving unit and used for receiving a driving level output by the driving unit to be switched on or switched off;
the voltage detection unit is connected with the power output unit and used for outputting a detection level corresponding to the power output unit;
the reference unit is used for outputting a reference level;
the comparison unit is connected with the voltage detection unit and the reference unit and used for receiving the detection level and the reference level and outputting a comparison result;
the driving unit is connected with the comparison unit and used for outputting the driving level according to the comparison result.
2. The driving power supply according to claim 1, wherein the switching unit includes a relay K1, a diode D1, a resistor R11, and a capacitor C4;
a first end of the coil of the relay K1 is connected to the driving unit, an anode of the diode D1 and a first end of the capacitor C4, a second end of the coil of the relay K1 is connected to a cathode of the diode D1, a second end of the capacitor C4 and a first end of the resistor R11, and a second end of the resistor R11 is used for connecting a power supply voltage; the first end of relay K1 first contact is connected first positive output, the second end of relay K1 first contact is connected the second positive output, the first end of relay K1 second contact is connected first negative output, the second end of relay K1 second contact is connected the second negative output.
3. The driving power supply according to claim 2, wherein the driving unit comprises a switching tube, a resistor R9 and a resistor R10;
the first end of switch tube is connected the first end of relay K1 coil, the second end of switch tube is connected the first negative output, the third end of switch tube is connected the first end of resistance R9 with the first end of resistance R10, the second end of resistance R9 is connected the output of comparator cell, the second end of resistance R10 is connected the first negative output.
4. The driving power supply according to claim 3, wherein the switching transistor comprises a MOS transistor Q1, the gate of the MOS transistor Q1 is connected to the first end of the resistor R9 and the first end of the resistor R10, the source of the MOS transistor Q1 is connected to the first negative input terminal, and the drain of the MOS transistor is connected to the first end of the coil of the relay K1.
5. The driving power supply according to claim 1, wherein the comparison unit comprises an operational amplifier U1 and a resistor R6;
the inverting input terminal of the operational amplifier U1 is connected to the voltage detection unit and the first terminal of the resistor R6, the non-inverting input terminal of the operational amplifier U1 is connected to the reference unit, and the output terminal of the operational amplifier U1 is connected to the second terminal of the resistor R6 and the driving unit.
6. The driving power supply according to claim 5, wherein the voltage detection unit includes a first resistor, a second resistor, and a capacitor C1;
the first end of the first resistor is connected with the first positive output end, the second end of the first resistor is connected with the first end of the second resistor, the first end of the capacitor C1 and the inverting input end of the operational amplifier U1, and the second end of the second resistor and the second end of the capacitor C1 are connected with the first negative output end.
7. The drive power supply according to claim 6,
the first resistor comprises a plurality of series-connected resistors; and/or the second resistance comprises a plurality of resistances connected in parallel.
8. The driving power supply according to claim 5, wherein the reference cell includes a resistor R7, a resistor R8, and a capacitor C2;
the first end of the resistor R7 is connected with the first end of the resistor R8, the first end of the capacitor C2 and the equidirectional input end of the operational amplifier U1, the second end of the resistor R7 is used for inputting a power supply voltage, and the second end of the resistor R8 and the second end of the capacitor C2 are connected with the first negative output end.
9. The driving power supply according to claim 1, wherein the power output unit comprises a PFC circuit, and the first positive output terminal and the first negative output terminal are respectively connected to output terminals of the PFC circuit.
10. A luminaire comprising a driving power supply according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123008688.2U CN217389060U (en) | 2021-12-01 | 2021-12-01 | Driving power supply and lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123008688.2U CN217389060U (en) | 2021-12-01 | 2021-12-01 | Driving power supply and lamp |
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| Publication Number | Publication Date |
|---|---|
| CN217389060U true CN217389060U (en) | 2022-09-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202123008688.2U Active CN217389060U (en) | 2021-12-01 | 2021-12-01 | Driving power supply and lamp |
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| CN (1) | CN217389060U (en) |
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2021
- 2021-12-01 CN CN202123008688.2U patent/CN217389060U/en active Active
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