CN207911108U - A kind of half-bridge power supply circuit and ultraviolet radiator driving circuit - Google Patents
A kind of half-bridge power supply circuit and ultraviolet radiator driving circuit Download PDFInfo
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- CN207911108U CN207911108U CN201721872693.9U CN201721872693U CN207911108U CN 207911108 U CN207911108 U CN 207911108U CN 201721872693 U CN201721872693 U CN 201721872693U CN 207911108 U CN207911108 U CN 207911108U
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Abstract
The utility model discloses a kind of half-bridge power supply circuit and ultraviolet radiator driving circuits, the half-bridge power supply circuit includes inductance coil L1, and first power supply circuit and the second power supply circuit, the first end of the inductance coil L1 is connected to external power circuit, the inductance coil L1 constitutes transformer device structure with its auxiliary winding, the first end of the auxiliary winding is grounded, the second end of auxiliary winding passes through the active power factor correction chip power supply that the first power supply circuit is driving circuit, the second end of the auxiliary winding is also powered by the second power supply circuit for semi-bridge inversion drive control circuit.The utility model is the power supply of semi-bridge inversion drive control circuit simultaneously by the inductance for active power factor correction chip power supply, it is at low cost, and pass through the design of the second power supply circuit so that semi-bridge inversion drive control circuit is not influenced by power circuit wide variation, and reliability is high.
Description
Technical field
The utility model is related to ultraviolet radiator driving circuits, and in particular to a kind of half-bridge power supply circuit and ultraviolet radiator driving
Circuit.
Background technology
Since general lighting is transitioned into rapidly the LED solid state lighting epoch from the discharge lamp epoch, cause entire industrial chain complete
Portion tends to LED industry chain.But conditional electronic ballast is still needed such as the field of UV ultraviolet lamp in certain special dimensions
Device is its mating lighting, but since whole industrial chain tends to the variation of LED industry chain, leads to the upper of UV lamp electric ballast
Trip special chip almost all is in end-of-life state so that the electric ballast is in the available state of no special chip.It is existing
In ultraviolet radiator driving circuit, semi-bridge inversion drive control circuit needs to draw a power supply circuit again (i.e. from power circuit
Increase by the second rectification circuit) it powers for it, it is of high cost, and when power circuit fluctuation is big, the output of power supply circuit offer
Voltage is also relatively large, may cause semi-bridge inversion drive control circuit that cannot normally start.
Utility model content
One of the purpose of this utility model is to provide a kind of half-bridge power supply circuit, by for active power factor correction
The inductance of chip power supply is powered for semi-bridge inversion drive control circuit simultaneously, at low cost, and reliability is high.
To achieve the goals above, the technical scheme adopted by the utility model is that：
A kind of half-bridge power supply circuit is applied in the driving circuit of ultraviolet radiator, and the half-bridge power supply circuit is driving
The semi-bridge inversion drive control circuit of circuit is powered, and the half-bridge power supply circuit includes the power supply electricity of inductance coil L1 and first
Road and the second power supply circuit, the first end of the inductance coil L1 are connected to external power circuit, the inductance coil L1 with
Its auxiliary winding constitutes transformer device structure, the first end ground connection of the auxiliary winding, and the second end of auxiliary winding is supplied by first
Circuit is the active power factor correction chip power supply of driving circuit, and the second end of the auxiliary winding also passes through the second power supply
Circuit is powered for semi-bridge inversion drive control circuit.
Preferably, second power supply circuit includes one end company of capacitance C1, diode D2 and resistance R1, the capacitance C1
It is connected to the second end of auxiliary winding, the other end of the capacitance C1 is connected to the anode of diode D2, and the cathode of diode D2 is logical
Cross the power end that resistance R1 is connected to semi-bridge inversion drive control circuit.
Preferably, second power supply circuit further includes voltage-stabiliser tube D1 and voltage-stabiliser tube D3, and the anode of the voltage-stabiliser tube D1 connects
The cathode on ground, voltage-stabiliser tube D1 is connected between capacitance C1 and the anode of diode D2；The plus earth of the voltage-stabiliser tube D3, voltage stabilizing
The cathode of pipe D3 is connected between resistance R1 and the power end of semi-bridge inversion drive control circuit.
Preferably, second power supply circuit further includes capacitance C2, the cathode ground connection of the capacitance C2, the anode of capacitance C2
It is connected between resistance R1 and the cathode of diode D2.
Preferably, first power supply circuit includes resistance R2, capacitance C3, voltage-stabiliser tube D6, diode D7, capacitance C4 and electricity
Hold C5, one end of the resistance R2 is connected to the second end of auxiliary winding, and the other end of resistance R2 after capacitance C3 by being connected to
The anode of diode D7, the cathode of diode D7 are connected to the power end of active power factor correction chip, the voltage-stabiliser tube D6
Plus earth, the cathode of voltage-stabiliser tube D6 is connected between capacitance C3 and the anode of diode D7；One end of the capacitance C4 and
The cathode of capacitance C5 is grounded, and the other end of the capacitance C4 and the anode of capacitance C5 are all connected to the cathode of diode D7 and have
Between the power end of active power factor correction chip.
The two of the purpose of this utility model are to provide a kind of ultraviolet radiator driving circuit, by for active power factor
The inductance of correcting chip power supply is powered for semi-bridge inversion drive control circuit simultaneously, at low cost, and reliability is high.
To achieve the goals above, the technical scheme adopted by the utility model is that：
A kind of ultraviolet radiator driving circuit comprising ultraviolet radiator, power circuit, active power factor correction chip and
The output end of semi-bridge inversion drive control circuit, the semi-bridge inversion drive control circuit is connected to the both ends of ultraviolet radiator, institute
The half-bridge power supply circuit that ultraviolet radiator driving circuit further includes above-mentioned is stated, the second end of the inductance L1 is connected by diode D5
To the input terminal of semi-bridge inversion drive control circuit.
Preferably, the power circuit includes AC power, filter circuit and rectification circuit, and the AC power passes through filter
Wave circuit is connected to the input terminal of rectification circuit, and the output end of the rectification circuit connects the first end of the inductance L1.
Preferably, the power circuit further includes filter capacitor C6, and one end ground connection of the filter capacitor C6, the other end connects
It is connected to the output end of rectification circuit.
Preferably, the filament both ends that the ultraviolet radiator is often held and connect a diode, the semi-bridge inversion drive control
Two output ends of circuit are respectively connected to the cathode of corresponding diode.
A kind of half-bridge power supply circuit and ultraviolet radiator driving circuit provided by the utility model, by for active power factor
The inductance of correcting chip power supply is powered for semi-bridge inversion drive control circuit simultaneously, at low cost, and passes through the second power supply circuit
Design so that semi-bridge inversion drive control circuit is not influenced by power circuit wide variation, and reliability is high.
Description of the drawings
Fig. 1 is a kind of circuit diagram of half-bridge power supply circuit of the utility model embodiment；
Fig. 2 is a kind of circuit diagram of ultraviolet radiator driving circuit of the utility model embodiment.
Specific implementation mode
Embodiment
It please refers to shown in Fig. 1, a kind of half-bridge power supply circuit, is applied in the driving circuit of ultraviolet radiator, the half-bridge
Power supply circuit is powered for the active power factor correction chip 20 of driving circuit and semi-bridge inversion drive control circuit 40 simultaneously.Tool
Body, half-bridge power supply circuit includes inductance coil L1 and the first power supply circuit and the second power supply circuit, the inductance coil L1
First end be connected to external power circuit, the inductance coil L1 constitutes transformer device structure with its auxiliary winding, described auxiliary
The first end of winding is helped to be grounded, the second end of auxiliary winding passes through the active power factor school that the first power supply circuit is driving circuit
The second end of positive chip power supply, the auxiliary winding is also powered by the second power supply circuit for semi-bridge inversion drive control circuit.
Second power supply circuit include one end of capacitance C1, diode D2 and resistance R1, the capacitance C1 be connected to it is auxiliary
The second end of winding, the other end of the capacitance C1 is helped to be connected to the anode of diode D2, the cathode of diode D2 passes through resistance
R1 is connected to the power end of semi-bridge inversion drive control circuit.Second power supply circuit further includes voltage-stabiliser tube D1 and voltage-stabiliser tube
The cathode of D3, the plus earth of the voltage-stabiliser tube D1, voltage-stabiliser tube D1 are connected between capacitance C1 and the anode of diode D2；It is described
The plus earth of voltage-stabiliser tube D3, the cathode of voltage-stabiliser tube D3 be connected to resistance R1 and semi-bridge inversion drive control circuit power end it
Between.Second power supply circuit further includes capacitance C2, and the cathode ground connection of the capacitance C2, the anode of capacitance C2 is connected to resistance R1
Between the cathode of diode D2.
Auxiliary winding is obtained corresponding voltage signal from inductance L1 and is led to from the second end of auxiliary winding by electromagnetic induction
It crosses the second power supply circuit to power to semi-bridge inversion drive control circuit, when process, the voltage in auxiliary winding first has capacitance C1
Second decompression, voltage-stabiliser tube D1 first times voltage stabilizing, diode D2 rectifications, capacitance C2 filtering, resistance R1 partial pressures, voltage-stabiliser tube D3 of voltage stabilizing
Backward semi-bridge inversion drive control circuit, since voltage stabilizing and filtering is employed many times in second power supply circuit so that semi-bridge inversion
The startup of drive control circuit is not influenced by the wide variation of power circuit 10, simultaneously as the second power supply circuit by
In the power supply circuit of active power factor correction chip, so cost greatly reduces.
It is routine techniques for the first power supply circuit of active power factor correction chip power supply comprising resistance R2, capacitance
C3, voltage-stabiliser tube D6, diode D7, capacitance C4 and capacitance C5, the resistance R2 one end be connected to the second end of auxiliary winding, electricity
The other end for hindering R2 is connected to active power factor by being connected to the anode of diode D7, the cathode of diode D7 after capacitance C3
The cathode of the power end of correcting chip, the plus earth of the voltage-stabiliser tube D6, voltage-stabiliser tube D6 is connected to capacitance C3 and diode D7
Anode between；One end of the capacitance C4 and the cathode of capacitance C5 are grounded, the other end of the capacitance C4 and capacitance C5's
Anode is all connected between the cathode of diode D7 and the power end of active power factor correction chip.Its working principle is that auxiliary
Voltage on winding passes through resistance R2 partial pressures, capacitance C3 decompressions, voltage-stabiliser tube D6 voltage stabilizings, diode D7 rectifications, capacitance C4 and C5 filter
To active power factor correction chip power supply after wave.
It please refers to shown in Fig. 2, a kind of ultraviolet radiator driving circuit is provided, be to be applied to above-mentioned half-bridge power supply circuit now
On some ultraviolet radiator driving circuits.Specially：Ultraviolet radiator driving circuit includes ultraviolet radiator 20, power circuit 10, active
PFC chip 30 and semi-bridge inversion drive control circuit 40, the output of the semi-bridge inversion drive control circuit 40
End is connected to the both ends of ultraviolet radiator 20, and to drive the work of ultraviolet radiator, half-bridge power supply circuit is by means of active power factor
The power supply circuit of correcting chip 30 is that active power factor correction chip 30 and semi-bridge inversion drive control circuit 40 are powered.
And inductance L1 also has another effect, second end by generated after diode D5 rectifications big voltage be connected to it is inverse
Become the input terminal of drive control circuit 40.It is routine techniques, and which is not described herein again.
Further, custom circuit may be used in the power circuit 10, includes mainly AC power, filter circuit
11, rectification circuit, filter capacitor C6, the AC power is connected to the input terminal of rectification circuit by filter circuit, described whole
The output end of current circuit connects the first end of the inductance L1.One end of the filter capacitor C6 is grounded, and the other end is connected to whole
The output end of current circuit.Rectification circuit uses full-wave rectification bridge D4.
The filament both ends that the ultraviolet radiator is often held and connect a diode (be respectively diode D8 and diode D9),
Two output ends of the semi-bridge inversion drive control circuit are respectively connected to the cathode of corresponding diode, ultraviolet radiator it is outer
It encloses and is provided with ballast circuit, be also custom circuit, also repeat no more here.
Active power factor correction chip 30 is combined with its peripheral circuit, constitutes active power factor correction circuit, with
The harmonic wave generated after diode D5 rectifications is filtered out, specific peripheral circuit includes that sample circuit and pwm control circuit (do not regard
Go out), sample circuit samples the output after diode D5 rectifications, then again by the piece of active power factor correction chip 30
End is selected to be exported to the front end (between anode and inductance L1 of diode D5) of diode D5 by pwm control circuit.
According to the disclosure and teachings of the above specification, the utility model those skilled in the art can also be to above-mentioned reality
The mode of applying is changed and is changed.Therefore, the utility model is not limited to specific implementation mode disclosed and described above, right
Some modifications and changes of the utility model should also be as falling into the protection scope of the claims of the present utility model.In addition, to the greatest extent
Some specific terms are used in pipe this specification, these terms are merely for convenience of description, not to the utility model
Constitute any restrictions.
Claims (9)
1. a kind of half-bridge power supply circuit is applied in the driving circuit of ultraviolet radiator, the half-bridge power supply circuit is driving electricity
The semi-bridge inversion drive control circuit on road is powered, which is characterized in that the half-bridge power supply circuit includes inductance coil L1, Yi Ji
The first end of one power supply circuit and the second power supply circuit, the inductance coil L1 is connected to external power circuit, the inductance
Coil L1 constitutes transformer device structure, the first end ground connection of the auxiliary winding with its auxiliary winding, and the second end of auxiliary winding is led to
The active power factor correction chip power supply that the first power supply circuit is driving circuit is crossed, the second end of the auxiliary winding also passes through
Second power supply circuit is powered for semi-bridge inversion drive control circuit.
2. half-bridge power supply circuit according to claim 1, which is characterized in that second power supply circuit include capacitance C1,
One end of diode D2 and resistance R1, the capacitance C1 are connected to the second end of auxiliary winding, and the other end of the capacitance C1 connects
It is connected to the anode of diode D2, the cathode of diode D2 is connected to the power supply of semi-bridge inversion drive control circuit by resistance R1
End.
3. half-bridge power supply circuit according to claim 2, which is characterized in that second power supply circuit further includes voltage-stabiliser tube
D1 and voltage-stabiliser tube D3, the cathode of the plus earth of the voltage-stabiliser tube D1, voltage-stabiliser tube D1 are being connected to capacitance C1 and diode D2 just
Between pole；The cathode of the plus earth of the voltage-stabiliser tube D3, voltage-stabiliser tube D3 is connected to resistance R1 and semi-bridge inversion drive control electricity
Between the power end on road.
4. half-bridge power supply circuit according to claim 2, which is characterized in that second power supply circuit further includes capacitance
The cathode of C2, the capacitance C2 are grounded, and the anode of capacitance C2 is connected between resistance R1 and the cathode of diode D2.
5. half-bridge power supply circuit according to claim 1, which is characterized in that first power supply circuit include resistance R2,
Capacitance C3, voltage-stabiliser tube D6, diode D7, capacitance C4 and capacitance C5, one end of the resistance R2 are connected to the second of auxiliary winding
End, the other end of resistance R2 are connected to active work(by being connected to the anode of diode D7, the cathode of diode D7 after capacitance C3
The cathode of the power end of rate factor correcting chip, the plus earth of the voltage-stabiliser tube D6, voltage-stabiliser tube D6 is connected to capacitance C3 and two
Between the anode of pole pipe D7；One end of the capacitance C4 and the cathode of capacitance C5 are grounded, the other end and electricity of the capacitance C4
The anode for holding C5 is all connected between the cathode of diode D7 and the power end of active power factor correction chip.
6. a kind of ultraviolet radiator driving circuit comprising ultraviolet radiator, power circuit, active power factor correction chip and half
The output end of bridge inversion drive control circuit, the semi-bridge inversion drive control circuit is connected to the both ends of ultraviolet radiator, special
Sign is that the ultraviolet radiator driving circuit further includes half-bridge power supply circuit as described in any one in claim 1-5, the electricity
The second end of sense coil L1 is connected to the input terminal of semi-bridge inversion drive control circuit by diode D5.
7. ultraviolet radiator driving circuit as claimed in claim 6, which is characterized in that the power circuit include AC power,
Filter circuit and rectification circuit, the AC power are connected to the input terminal of rectification circuit, the rectified current by filter circuit
The output end on road connects the first end of the inductance coil L1.
8. ultraviolet radiator driving circuit as claimed in claim 7, which is characterized in that the power circuit further includes filter capacitor
One end of C6, the filter capacitor C6 are grounded, and the other end is connected to the output end of rectification circuit.
9. ultraviolet radiator driving circuit as claimed in claim 6, which is characterized in that the filament both ends that the ultraviolet radiator is often held
And a diode is connect, two output ends of the semi-bridge inversion drive control circuit are respectively connected to the negative of corresponding diode
Pole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721872693.9U CN207911108U (en) | 2017-12-28 | 2017-12-28 | A kind of half-bridge power supply circuit and ultraviolet radiator driving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721872693.9U CN207911108U (en) | 2017-12-28 | 2017-12-28 | A kind of half-bridge power supply circuit and ultraviolet radiator driving circuit |
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| Publication Number | Publication Date |
|---|---|
| CN207911108U true CN207911108U (en) | 2018-09-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721872693.9U Active CN207911108U (en) | 2017-12-28 | 2017-12-28 | A kind of half-bridge power supply circuit and ultraviolet radiator driving circuit |
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| CN (1) | CN207911108U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110139453A (en) * | 2019-05-05 | 2019-08-16 | 莫夫 | A kind of lighting apparatus for discharge lamp and its ignition method |
-
2017
- 2017-12-28 CN CN201721872693.9U patent/CN207911108U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110139453A (en) * | 2019-05-05 | 2019-08-16 | 莫夫 | A kind of lighting apparatus for discharge lamp and its ignition method |
| CN110139453B (en) * | 2019-05-05 | 2021-06-22 | 广东科技学院 | Discharge lamp lighting device and lighting method thereof |
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