CN114071820B - Krypton lamp light source driving circuit - Google Patents
Krypton lamp light source driving circuit Download PDFInfo
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- CN114071820B CN114071820B CN202111400178.1A CN202111400178A CN114071820B CN 114071820 B CN114071820 B CN 114071820B CN 202111400178 A CN202111400178 A CN 202111400178A CN 114071820 B CN114071820 B CN 114071820B
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- 229910052743 krypton Inorganic materials 0.000 title claims abstract description 29
- DNNSSWSSYDEUBZ-UHFFFAOYSA-N krypton atom Chemical compound [Kr] DNNSSWSSYDEUBZ-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 239000003990 capacitor Substances 0.000 claims description 153
- 230000003287 optical effect Effects 0.000 claims description 3
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 6
- 230000005669 field effect Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical compound O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
- H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
- H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
- H05B41/282—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
- H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
- H05B41/288—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices and specially adapted for lamps without preheating electrodes, e.g. for high-intensity discharge lamps, high-pressure mercury or sodium lamps or low-pressure sodium lamps
- H05B41/2881—Load circuits; Control thereof
-
- 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
Landscapes
- Dc-Dc Converters (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention belongs to the technical field of driving power supply circuits, and particularly relates to a krypton lamp light source driving circuit. The krypton lamp light source driving circuit comprises a booster circuit, a glow starting circuit, a constant current source current setting circuit and an optocoupler; the booster circuit is respectively and electrically connected with the starting circuit and the constant current circuit; the starting circuit is electrically connected with the constant current circuit; the constant current circuit is electrically connected with the constant current source current setting circuit; the optocoupler is electrically connected with the constant current circuit and the constant current source current setting circuit respectively. The invention has the characteristics of simple circuit structure, stable triggering and higher safety.
Description
Technical Field
The invention belongs to the technical field of driving power supply circuits, and particularly relates to a krypton lamp light source driving circuit.
Background
At present, the traditional pulse krypton lamp driving circuit needs to use a relay switch circuit, a bridge rectifier circuit, an IGBT and other circuits, so that the whole volume of the krypton lamp driving circuit is large, the system is complex, and the cost is high. In addition, the pulse width of the power panel driven by the traditional krypton lamp is large, and the current cannot be monitored in real time, so that the problem of safety is easy to occur.
Therefore, it is necessary to design a krypton light source driving circuit with simple structure, stable triggering and higher safety.
For example, a pulse and constant current dual-purpose power supply for driving a continuous krypton lamp described in chinese patent document with application number CN200420017383.5, wherein alternating current is rectified by a rectifier bridge, filtered by a capacitor (C0), and then supplied to a main power supply, and a series switch modulation power supply main circuit is formed by an insulated gate field effect transistor (IGBT), a filter inductor (L), a capacitor (C1) and a freewheeling diode (D1); the output ends of the filter inductor (L) and the ignition coil (BT 2) are connected with the krypton lamp; the method is characterized in that: the insulated gate field effect transistor (IGBT) is connected with a pin (1), a pin (3) and a pin (6) of the driving module (EXB 841), a pin (14) and a pin (15) of the driving module (EXB 841) are connected with a socket (CZ 4) of a singlechip control circuit, and driving units (GD 1, GD2 and GD 3) of a relay coil of the socket (CZ 3) of the singlechip control circuit are connected. Although the power supply driving circuit has the characteristics of good stability and large working current range value, the power supply driving circuit still has the defects of large whole volume, complex system and high cost due to the fact that the bridge rectifier circuit, the IGBT and other circuits are used in the power supply driving circuit.
Disclosure of Invention
The invention aims to solve the problems of large volume, complex system, high cost and poor safety of the traditional pulse krypton lamp driving circuit in the prior art, and provides the krypton lamp light source driving circuit which has the advantages of simple structure, stable triggering and higher safety.
In order to achieve the aim of the invention, the invention adopts the following technical scheme:
the krypton lamp light source driving circuit comprises a booster circuit, a glow starting circuit, a constant current source current setting circuit and an optocoupler; the booster circuit is respectively and electrically connected with the starting circuit and the constant current circuit; the starting circuit is electrically connected with the constant current circuit; the constant current circuit is electrically connected with the constant current source current setting circuit; the optocoupler is electrically connected with the constant current circuit and the constant current source current setting circuit respectively.
Preferably, the boost circuit includes a chip UC3843, a flyback transformer T1, a resistor R3, a resistor R6, a resistor R9, a resistor R10, a resistor R14, a polarity capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8, a capacitor C10, a capacitor C11, a capacitor C13, a diode D1, a diode D2, and a MOS transistor Q1; the 1 st pin of the chip UC3843 is electrically connected with the capacitor C6 and the capacitor C7 respectively; the 3 rd pin of the chip UC3843 is electrically connected with the resistor R3 and the capacitor C7 respectively; the resistor R3 is electrically connected with the capacitor C6; the 14 th pin of the chip UC3843 is respectively and electrically connected with the capacitor C10 and the resistor R9, and the 7 th pin of the chip UC3843 is respectively and electrically connected with the resistor R9 and the capacitor C11; the capacitor C10 is electrically connected with the capacitor C11, and the capacitor C10 and the capacitor C11 are grounded; the 12 th pin of the chip UC3843 is electrically connected with the 11 th pin of the chip UC3843, the capacitor C5, the capacitor C8 and the 24V power supply positive end respectively; the capacitor C5 is electrically connected with the capacitor C8, and the capacitor C5 and the capacitor C8 are grounded; the 8 th pin of the chip UC3843 and the 9 th pin of the chip UC3843 are grounded; the 5 th pin of the chip UC3843 is electrically connected with the resistor R10 and the capacitor C13 respectively; the capacitor C13 is electrically connected with the resistor R14, and the capacitor C13 is grounded with the resistor R14; the resistor R10 is electrically connected with the resistor R14 and the source electrode of the MOS tube Q1 respectively; the grid electrode of the MOS tube Q1 is electrically connected with the 10 th pin of the chip UC 3843; the drain electrode of the MOS tube Q1 is respectively and electrically connected with the primary coil of the flyback transformer T1, the capacitor C3 and the resistor R1; the resistor R1 is electrically connected with the capacitor C3; the resistor R1 is electrically connected with the anode of the diode D2; the negative electrode of the diode D2 is respectively and electrically connected with the polar capacitor C1, the capacitor C2, the primary coil of the flyback transformer T1 and the positive end of the 24V power supply; the polar capacitor C1 is connected with the capacitor C2 in parallel, and the polar capacitor C1 and the capacitor C2 are grounded; one end of a resistor R6 is electrically connected with the secondary coil of the flyback transformer T1, and the other end of the resistor R6 is electrically connected with a capacitor C4 and a-400V power supply; the capacitor C4 is electrically connected with the cathode of the diode D1; the anode of the diode D1 is electrically connected to the secondary winding of the flyback transformer T1.
Preferably, the starting circuit comprises a transformer T3, a resistor R2, a resistor R8, a resistor R11, a capacitor C9, a diode D3, a diode D6 and a high-voltage trigger diode D5; the positive electrode of the diode D3 is grounded, and the negative electrode of the diode D3 is electrically connected with one end of the resistor R2; the other end of the resistor R2 is electrically connected with one end of the capacitor C9 and one end of the high-voltage trigger diode D5 respectively; the other end of the high-voltage trigger diode D5 is electrically connected with a resistor R8 and a resistor R11 respectively; the resistor R11 is electrically connected with the primary coil of the transformer T3; the primary coil of the transformer T3 is connected with a-400V power supply; the cathode of the diode D6 is electrically connected with the secondary coil; the positive electrode of the diode D6 is electrically connected to the constant current circuit.
Preferably, the constant current circuit includes an operational amplifier U2, a capacitor C14, a resistor R18, a resistor R22, a diode D7, a diode D8, and a zener diode U4; the non-inverting input end of the operational amplifier U2 is electrically connected with one end of a resistor R18 and one end of a capacitor C14 respectively; the other end of the capacitor C14 is electrically connected with the output end of the operational amplifier U2 and the anode of the diode D7 respectively; the inverting input end of the operational amplifier U2 and the cathode of the zener diode U4; the positive electrode of the voltage stabilizing diode U4 is respectively and electrically connected with the resistor R22, the negative electrode of the diode D8 and the-400V power supply; resistor R18 and resistor R22 are electrically connected.
Preferably, the constant current source current setting circuit comprises an operational amplifier U5, a resistor R25, a resistor R26, a resistor R27, a resistor R31, a resistor R32, a capacitor C15, a diode D9, a MOS tube Q3 and a MOS tube Q5; the non-inverting input end of the operational amplifier U5 is electrically connected with one end of a resistor R27 and one end of a capacitor C15 respectively; the other end of the capacitor C15 is electrically connected with the output end of the operational amplifier U5 and the anode of the diode D9 respectively; the inverting input end of the operational amplifier U5 is electrically connected with the resistor R31 and the drain electrode of the MOS tube Q3 respectively; resistor R31 is grounded; the source electrode of the MOS tube Q3 is electrically connected with one end of a resistor R25, and the other end of the resistor R25 is electrically connected with the positive end of a 24V power supply; the grid electrode of the MOS tube Q3 is respectively and electrically connected with the drain electrode of the MOS tube Q5 and one end of a resistor R26, and the other end of the resistor R26 is electrically connected with the positive end of the 24V power supply; the source electrode of the MOS tube Q5 is electrically connected with one end of a resistor R32, and the other end of the resistor R32 is connected with a-400V power supply; the anode of the diode D9 is electrically connected to the optocoupler and the constant current circuit, respectively.
Preferably, the krypton light source driving circuit further includes a resistor R17, a resistor R19, a resistor R20, and a resistor R21; the optical coupler adopts a chip PC817; the 1 st pin of the chip PC817 is electrically connected with the constant current and the constant current source current setting circuit respectively; the 2 nd pin of the chip PC817 is electrically connected with one end of a resistor R21, and the other end of the resistor R21 is grounded; the 3 rd pin of the chip PC817 is electrically connected with the resistor R19 and the resistor R20 respectively; resistor R20 is grounded; the 4 th pin of the chip PC817 is electrically connected with one end of a resistor R17, and the other end of the resistor R17 is connected with a +5V power supply.
Preferably, the krypton light source driving circuit further includes a constant current source feedback circuit; the constant current source feedback circuit comprises a resistor R23, a resistor R24, a resistor R28, a resistor R29, a resistor R30, a MOS tube Q2 and a MOS tube Q4; the drain electrode of the MOS tube Q2 is electrically connected with one end of a resistor R29, and the other end of the resistor R29 is grounded; the source electrode of the MOS tube Q2 is electrically connected with one end of a resistor R23, and the other end of the resistor R23 is electrically connected with the positive end of a 24V power supply; the grid electrode of the MOS tube Q2 is respectively and electrically connected with the drain electrode of the MOS tube Q4 and one end of a resistor R24, and the other end of the resistor R24 is electrically connected with the positive end of a 24V power supply; the source electrode of the MOS tube Q5 is electrically connected with one end of a resistor R30, and the other end of the resistor R30 is connected with a-400V power supply; the gate of the MOS transistor Q5 is electrically connected with a resistor R28.
Preferably, the krypton light source driving circuit further includes a resistor R12 and a resistor R13; the resistor R12 is respectively and electrically connected with the booster circuit, the glow starting circuit and the constant current circuit; the resistor R13 is electrically connected with the booster circuit, the glow starting circuit and the constant current circuit respectively.
Compared with the prior art, the invention has the beneficial effects that: (1) The main output 1500V of the starting circuit is made of the high-voltage trigger diode, the circuit design is simple, the size of the circuit board is small, and the triggering is more stable; (2) The invention can control the pulse width within 1ns, and has higher safety; (3) The constant current source in the invention is adjustable, can be monitored on line, and is convenient for debugging and real-time monitoring.
Drawings
FIG. 1 is a circuit diagram of a krypton light source driving circuit of the present invention;
FIG. 2 is a circuit diagram of a boost circuit according to the present invention;
FIG. 3 is a circuit diagram of a starter circuit according to the present invention;
fig. 4 is a circuit diagram of a constant current circuit in the present invention;
FIG. 5 is a circuit diagram of a constant current source current setting circuit in the present invention;
fig. 6 is a circuit diagram of a constant current source feedback circuit in the present invention.
In the figure: a booster circuit 1, a starter circuit 2, a constant current circuit 3, a constant current source current setting circuit 4, and a constant current source feedback circuit 5.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention, specific embodiments of the present invention will be described below with reference to the accompanying drawings. It is evident that the drawings in the following description are only examples of the invention, from which other drawings and other embodiments can be obtained by a person skilled in the art without inventive effort.
Example 1:
the krypton light source driving circuit shown in fig. 1 comprises a booster circuit 1, a glow starting circuit 2, a constant current circuit 3, a constant current source current setting circuit 4, a constant current source feedback circuit 5 and an optocoupler; the booster circuit is respectively and electrically connected with the starting circuit and the constant current circuit; the starting circuit is electrically connected with the constant current circuit; the constant current circuit is electrically connected with the constant current source current setting circuit; the optocoupler is electrically connected with the constant current circuit and the constant current source current setting circuit respectively.
Further, as shown in fig. 2, the boost circuit includes a chip UC3843, a flyback transformer T1, a resistor R3, a resistor R6, a resistor R9, a resistor R10, a resistor R14, a polarity capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8, a capacitor C10, a capacitor C11, a capacitor C13, a diode D1, a diode D2, and a MOS transistor Q1; the 1 st pin of the chip UC3843 is electrically connected with the capacitor C6 and the capacitor C7 respectively; the 3 rd pin of the chip UC3843 is electrically connected with the resistor R3 and the capacitor C7 respectively; the resistor R3 is electrically connected with the capacitor C6; the 14 th pin of the chip UC3843 is respectively and electrically connected with the capacitor C10 and the resistor R9, and the 7 th pin of the chip UC3843 is respectively and electrically connected with the resistor R9 and the capacitor C11; the capacitor C10 is electrically connected with the capacitor C11, and the capacitor C10 and the capacitor C11 are grounded; the 12 th pin of the chip UC3843 is electrically connected with the 11 th pin of the chip UC3843, the capacitor C5, the capacitor C8 and the 24V power supply positive end respectively; the capacitor C5 is electrically connected with the capacitor C8, and the capacitor C5 and the capacitor C8 are grounded; the 8 th pin of the chip UC3843 and the 9 th pin of the chip UC3843 are grounded; the 5 th pin of the chip UC3843 is electrically connected with the resistor R10 and the capacitor C13 respectively; the capacitor C13 is electrically connected with the resistor R14, and the capacitor C13 is grounded with the resistor R14; the resistor R10 is electrically connected with the resistor R14 and the source electrode of the MOS tube Q1 respectively; the grid electrode of the MOS tube Q1 is electrically connected with the 10 th pin of the chip UC 3843; the drain electrode of the MOS tube Q1 is respectively and electrically connected with the primary coil of the flyback transformer T1, the capacitor C3 and the resistor R1; the resistor R1 is electrically connected with the capacitor C3; the resistor R1 is electrically connected with the anode of the diode D2; the negative electrode of the diode D2 is respectively and electrically connected with the polar capacitor C1, the capacitor C2, the primary coil of the flyback transformer T1 and the positive end of the 24V power supply; the polar capacitor C1 is connected with the capacitor C2 in parallel, and the polar capacitor C1 and the capacitor C2 are grounded; one end of a resistor R6 is electrically connected with the secondary coil of the flyback transformer T1, and the other end of the resistor R6 is electrically connected with a capacitor C4 and a-400V power supply; the capacitor C4 is electrically connected with the cathode of the diode D1; the anode of the diode D1 is electrically connected to the secondary winding of the flyback transformer T1.
The boost circuit is built by a chip UC3843, a DCDC boost topology is used, a 14-pin VREF of the chip UC3843 outputs reference voltage outwards, a 7-pin RT/CT sets clock frequency, a 1-pin COMP is an output end of an error amplifier, a 3-pin FB is a feedback end, one end of a resistor R10 is connected with a 5-pin ISEN of the chip UC3843 to perform current limiting detection, and a capacitor C3 and a resistor R1 are connected in parallel on a primary coil of a flyback transformer T1 to be used as inductance relief. The circuit formed by the capacitor C3, the resistor R1 and the diode D2 is used for the calculation of the clamping circuit.
Further, as shown in fig. 3, the starting circuit includes a transformer T3, a resistor R2, a resistor R8, a resistor R11, a capacitor C9, a diode D3, a diode D6, and a high voltage trigger diode D5; the positive electrode of the diode D3 is grounded, and the negative electrode of the diode D3 is electrically connected with one end of the resistor R2; the other end of the resistor R2 is electrically connected with one end of the capacitor C9 and one end of the high-voltage trigger diode D5 respectively; the other end of the high-voltage trigger diode D5 is electrically connected with a resistor R8 and a resistor R11 respectively; the resistor R11 is electrically connected with the primary coil of the transformer T3; the primary coil of the transformer T3 is connected with a-400V power supply; the cathode of the diode D6 is electrically connected with the secondary coil; the positive electrode of the diode D6 is electrically connected to the constant current circuit.
Initially powered up, the boost circuit outputs-400V, gnd is connected to-400V through resistor R2, capacitor C9. The capacitor C9 is charged, the resistor R2 is used for limiting current, the D5 is a high-voltage trigger diode, when the voltage at the capacitor C9 rises to the D5 trigger voltage, the diode D6 is conducted, the capacitor C9 is rapidly discharged through the resistor R11 and the primary of the transformer T3, and the secondary of the transformer T3 outputs-1500V.
Further, as shown in fig. 4, the constant current circuit includes an operational amplifier U2, a capacitor C14, a resistor R18, a resistor R22, a diode D7, a diode D8, and a zener diode U4; the non-inverting input end of the operational amplifier U2 is electrically connected with one end of a resistor R18 and one end of a capacitor C14 respectively; the other end of the capacitor C14 is electrically connected with the output end of the operational amplifier U2 and the anode of the diode D7 respectively; the inverting input end of the operational amplifier U2 and the cathode of the zener diode U4; the positive electrode of the voltage stabilizing diode U4 is respectively and electrically connected with the resistor R22, the negative electrode of the diode D8 and the-400V power supply; resistor R18 and resistor R22 are electrically connected.
Further, as shown in fig. 5, the constant current source current setting circuit includes an operational amplifier U5, a resistor R25, a resistor R26, a resistor R27, a resistor R31, a resistor R32, a capacitor C15, a diode D9, a MOS transistor Q3, and a MOS transistor Q5; the non-inverting input end of the operational amplifier U5 is electrically connected with one end of a resistor R27 and one end of a capacitor C15 respectively; the other end of the capacitor C15 is electrically connected with the output end of the operational amplifier U5 and the anode of the diode D9 respectively; the inverting input end of the operational amplifier U5 is electrically connected with the resistor R31 and the drain electrode of the MOS tube Q3 respectively; resistor R31 is grounded; the source electrode of the MOS tube Q3 is electrically connected with one end of a resistor R25, and the other end of the resistor R25 is electrically connected with the positive end of a 24V power supply; the grid electrode of the MOS tube Q3 is respectively and electrically connected with the drain electrode of the MOS tube Q5 and one end of a resistor R26, and the other end of the resistor R26 is electrically connected with the positive end of the 24V power supply; the source electrode of the MOS tube Q5 is electrically connected with one end of a resistor R32, and the other end of the resistor R32 is connected with a-400V power supply; the anode of the diode D9 is electrically connected to the optocoupler and the constant current circuit, respectively.
The VIN is used to set current, and the operational amplifier U5 outputs an and gate to the optocoupler through the voltage comparison of the resistor at the R6 end, and then feeds back to the chip UC3843 to regulate the output.
Further, as shown in fig. 6, the constant current source feedback circuit includes a resistor R23, a resistor R24, a resistor R28, a resistor R29, a resistor R30, a MOS transistor Q2, and a MOS transistor Q4; the drain electrode of the MOS tube Q2 is electrically connected with one end of a resistor R29, and the other end of the resistor R29 is grounded; the source electrode of the MOS tube Q2 is electrically connected with one end of a resistor R23, and the other end of the resistor R23 is electrically connected with the positive end of a 24V power supply; the grid electrode of the MOS tube Q2 is respectively and electrically connected with the drain electrode of the MOS tube Q4 and one end of a resistor R24, and the other end of the resistor R24 is electrically connected with the positive end of a 24V power supply; the source electrode of the MOS tube Q5 is electrically connected with one end of a resistor R30, and the other end of the resistor R30 is connected with a-400V power supply; the gate of the MOS transistor Q5 is electrically connected with a resistor R28.
And VOUT detects and outputs the constant current source.
In addition, the krypton light source driving circuit also includes a resistor R17, a resistor R19, a resistor R20, and a resistor R21; the optical coupler adopts a chip PC817; the 1 st pin of the chip PC817 is electrically connected with the constant current and the constant current source current setting circuit respectively; the 2 nd pin of the chip PC817 is electrically connected with one end of a resistor R21, and the other end of the resistor R21 is grounded; the 3 rd pin of the chip PC817 is electrically connected with the resistor R19 and the resistor R20 respectively; resistor R20 is grounded; the 4 th pin of the chip PC817 is electrically connected with one end of a resistor R17, and the other end of the resistor R17 is connected with a +5V power supply.
Further, in fig. 1, the krypton light source driving circuit further includes a resistor R12 and a resistor R13; the resistor R12 is respectively and electrically connected with the booster circuit, the glow starting circuit and the constant current circuit; the resistor R13 is electrically connected with the booster circuit, the glow starting circuit and the constant current circuit respectively.
The krypton lamp light source drive mainly comprises a starting circuit and a constant current circuit, wherein the power is electrified to boost the voltage by 24V to output-400V to charge the capacitor of a high-voltage trigger diode, after the threshold of the high-voltage trigger diode is reached, the diode is conducted to output-1500V, after the starting is successful, the constant current source is started, the starting circuit is closed, the 0-2mA feedback current can be set outside the constant current source, and the starting failure continues to enter the starting circuit.
The main output 1500V of the starting circuit is made of the high-voltage trigger diode, the circuit design is simple, the size of the circuit board is small, and the triggering is more stable; the invention can control the pulse width within 1ns, and has higher safety; the constant current source in the invention is adjustable, can be monitored on line, and is convenient for debugging and real-time monitoring.
The foregoing is only illustrative of the preferred embodiments and principles of the present invention, and changes in specific embodiments will occur to those skilled in the art upon consideration of the teachings provided herein, and such changes are intended to be included within the scope of the invention as defined by the claims.
Claims (7)
1. The krypton lamp light source driving circuit is characterized by comprising a booster circuit, a glow starting circuit, a constant current source current setting circuit and an optocoupler; the booster circuit is respectively and electrically connected with the starting circuit and the constant current circuit; the starting circuit is electrically connected with the constant current circuit; the constant current circuit is electrically connected with the constant current source current setting circuit; the optocoupler is electrically connected with the constant current circuit and the constant current source current setting circuit respectively;
the starting circuit comprises a transformer T3, a resistor R2, a resistor R8, a resistor R11, a capacitor C9, a diode D3, a diode D6 and a high-voltage trigger diode D5; the positive electrode of the diode D3 is grounded, and the negative electrode of the diode D3 is electrically connected with one end of the resistor R2; the other end of the resistor R2 is electrically connected with one end of the capacitor C9 and one end of the high-voltage trigger diode D5 respectively; the other end of the high-voltage trigger diode D5 is electrically connected with a resistor R8 and a resistor R11 respectively; the resistor R11 is electrically connected with the primary coil of the transformer T3; the primary coil of the transformer T3 is connected with a-400V power supply; the cathode of the diode D6 is electrically connected with the secondary coil; the positive electrode of the diode D6 is electrically connected to the constant current circuit.
2. The krypton light source driving circuit according to claim 1, wherein the booster circuit includes a chip UC3843, a flyback transformer T1, a resistor R3, a resistor R6, a resistor R9, a resistor R10, a resistor R14, a polarity capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8, a capacitor C10, a capacitor C11, a capacitor C13, a diode D1, a diode D2, and a MOS transistor Q1; the 1 st pin of the chip UC3843 is electrically connected with the capacitor C6 and the capacitor C7 respectively; the 3 rd pin of the chip UC3843 is electrically connected with the resistor R3 and the capacitor C7 respectively; the resistor R3 is electrically connected with the capacitor C6; the 14 th pin of the chip UC3843 is respectively and electrically connected with the capacitor C10 and the resistor R9, and the 7 th pin of the chip UC3843 is respectively and electrically connected with the resistor R9 and the capacitor C11; the capacitor C10 is electrically connected with the capacitor C11, and the capacitor C10 and the capacitor C11 are grounded; the 12 th pin of the chip UC3843 is electrically connected with the 11 th pin of the chip UC3843, the capacitor C5, the capacitor C8 and the 24V power supply positive end respectively; the capacitor C5 is electrically connected with the capacitor C8, and the capacitor C5 and the capacitor C8 are grounded; the 8 th pin of the chip UC3843 and the 9 th pin of the chip UC3843 are grounded; the 5 th pin of the chip UC3843 is electrically connected with the resistor R10 and the capacitor C13 respectively; the capacitor C13 is electrically connected with the resistor R14, and the capacitor C13 is grounded with the resistor R14; the resistor R10 is electrically connected with the resistor R14 and the source electrode of the MOS tube Q1 respectively; the grid electrode of the MOS tube Q1 is electrically connected with the 10 th pin of the chip UC 3843; the drain electrode of the MOS tube Q1 is respectively and electrically connected with the primary coil of the flyback transformer T1, the capacitor C3 and the resistor R1; the resistor R1 is electrically connected with the capacitor C3; the resistor R1 is electrically connected with the anode of the diode D2; the negative electrode of the diode D2 is respectively and electrically connected with the polar capacitor C1, the capacitor C2, the primary coil of the flyback transformer T1 and the positive end of the 24V power supply; the polar capacitor C1 is connected with the capacitor C2 in parallel, and the polar capacitor C1 and the capacitor C2 are grounded; one end of a resistor R6 is electrically connected with the secondary coil of the flyback transformer T1, and the other end of the resistor R6 is electrically connected with a capacitor C4 and a-400V power supply; the capacitor C4 is electrically connected with the cathode of the diode D1; the anode of the diode D1 is electrically connected to the secondary winding of the flyback transformer T1.
3. The krypton light source driving circuit according to claim 1, wherein the constant current circuit includes an operational amplifier U2, a capacitor C14, a resistor R18, a resistor R22, a diode D7, a diode D8, and a zener diode U4; the non-inverting input end of the operational amplifier U2 is electrically connected with one end of a resistor R18 and one end of a capacitor C14 respectively; the other end of the capacitor C14 is electrically connected with the output end of the operational amplifier U2 and the anode of the diode D7 respectively; the inverting input end of the operational amplifier U2 and the cathode of the zener diode U4; the positive electrode of the voltage stabilizing diode U4 is respectively and electrically connected with the resistor R22, the negative electrode of the diode D8 and the-400V power supply; resistor R18 and resistor R22 are electrically connected.
4. The krypton light source driving circuit according to claim 1, wherein the constant current source current setting circuit includes an operational amplifier U5, a resistor R25, a resistor R26, a resistor R27, a resistor R31, a resistor R32, a capacitor C15, a diode D9, a MOS transistor Q3, and a MOS transistor Q5; the non-inverting input end of the operational amplifier U5 is electrically connected with one end of a resistor R27 and one end of a capacitor C15 respectively; the other end of the capacitor C15 is electrically connected with the output end of the operational amplifier U5 and the anode of the diode D9 respectively; the inverting input end of the operational amplifier U5 is electrically connected with the resistor R31 and the drain electrode of the MOS tube Q3 respectively; resistor R31 is grounded; the source electrode of the MOS tube Q3 is electrically connected with one end of a resistor R25, and the other end of the resistor R25 is electrically connected with the positive end of a 24V power supply; the grid electrode of the MOS tube Q3 is respectively and electrically connected with the drain electrode of the MOS tube Q5 and one end of a resistor R26, and the other end of the resistor R26 is electrically connected with the positive end of the 24V power supply; the source electrode of the MOS tube Q5 is electrically connected with one end of a resistor R32, and the other end of the resistor R32 is connected with a-400V power supply; the anode of the diode D9 is electrically connected to the optocoupler and the constant current circuit, respectively.
5. The krypton light source drive circuit of claim 1, further comprising an optocoupler, a resistor R17, a resistor R19, a resistor R20, and a resistor R21; the optical coupler adopts a chip PC817; the 1 st pin of the chip PC817 is electrically connected with the constant current and the constant current source current setting circuit respectively; the 2 nd pin of the chip PC817 is electrically connected with one end of a resistor R21, and the other end of the resistor R21 is grounded; the 3 rd pin of the chip PC817 is electrically connected with the resistor R19 and the resistor R20 respectively; resistor R20 is grounded; the 4 th pin of the chip PC817 is electrically connected with one end of a resistor R17, and the other end of the resistor R17 is connected with a +5V power supply.
6. The krypton light source driving circuit according to claim 1, further comprising a constant current source feedback circuit; the constant current source feedback circuit comprises a resistor R23, a resistor R24, a resistor R28, a resistor R29, a resistor R30, a MOS tube Q2 and a MOS tube Q4; the drain electrode of the MOS tube Q2 is electrically connected with one end of a resistor R29, and the other end of the resistor R29 is grounded; the source electrode of the MOS tube Q2 is electrically connected with one end of a resistor R23, and the other end of the resistor R23 is electrically connected with the positive end of a 24V power supply; the grid electrode of the MOS tube Q2 is respectively and electrically connected with the drain electrode of the MOS tube Q4 and one end of a resistor R24, and the other end of the resistor R24 is electrically connected with the positive end of a 24V power supply; the source electrode of the MOS tube Q5 is electrically connected with one end of a resistor R30, and the other end of the resistor R30 is connected with a-400V power supply; the gate of the MOS transistor Q5 is electrically connected with a resistor R28.
7. The krypton light source drive circuit according to any one of claims 1 to 6, further comprising a resistor R12 and a resistor R13; the resistor R12 is respectively and electrically connected with the booster circuit, the glow starting circuit and the constant current circuit; the resistor R13 is electrically connected with the booster circuit, the glow starting circuit and the constant current circuit respectively.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201355880Y (en) * | 2008-12-30 | 2009-12-02 | 山东华鼎伟业能源科技有限公司 | PWM pulse control circuit of HID lamp electronic ballast |
| CN106061085A (en) * | 2016-08-15 | 2016-10-26 | 东文高压电源（天津）股份有限公司 | High-precision isolated krypton lamp high-voltage power circuit with function of current adjustment |
| CN109451639A (en) * | 2018-09-30 | 2019-03-08 | 深圳市英朗光电有限公司 | A kind of efficient direct current fluorescent lamp and efficient direct current fluorescent-lamp-use adaptive transformation device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7235932B2 (en) * | 2003-08-01 | 2007-06-26 | Purespectrum, Inc. | High efficiency ballast for gas discharge lamps |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201355880Y (en) * | 2008-12-30 | 2009-12-02 | 山东华鼎伟业能源科技有限公司 | PWM pulse control circuit of HID lamp electronic ballast |
| CN106061085A (en) * | 2016-08-15 | 2016-10-26 | 东文高压电源（天津）股份有限公司 | High-precision isolated krypton lamp high-voltage power circuit with function of current adjustment |
| CN109451639A (en) * | 2018-09-30 | 2019-03-08 | 深圳市英朗光电有限公司 | A kind of efficient direct current fluorescent lamp and efficient direct current fluorescent-lamp-use adaptive transformation device |
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