CN208369926U - A kind of lamp tube drive circuit - Google Patents
A kind of lamp tube drive circuit Download PDFInfo
- Publication number
- CN208369926U CN208369926U CN201820992780.6U CN201820992780U CN208369926U CN 208369926 U CN208369926 U CN 208369926U CN 201820992780 U CN201820992780 U CN 201820992780U CN 208369926 U CN208369926 U CN 208369926U
- Authority
- CN
- China
- Prior art keywords
- frequency
- lamp tube
- power
- drive circuit
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
The utility model discloses a kind of lamp tube drive circuit, including frequency generator, power switch tube and booster circuit, the frequency generator is used to generate the control signal with fixed frequency；The power switch tube is equipped with control terminal, first switch end and second switch end, the control terminal connects the output end of the frequency generator, the first switch end connects the booster circuit, second switch end voltage is zero, power switch tube on or off under the control of said control signal；The booster circuit has input side and outlet side, and the input side is series between the power switch tube and power supply, and the outlet side is used to export the driving voltage to the lamp tube power supply.The beneficial effect of the utility model preferred embodiment includes: to substantially reduce the calorific value of circuit using power switch tube and frequency generator, enables this circuit to the illumination applied to high-power fluorescent tube；Single power switch tube structure, reduces circuit complexity.
Description
Technical field
The utility model relates to fluorescent tube more particularly to a kind of lamp tube drive circuits.
Background technique
The mankind have the tradition using the ultraviolet portion sterilization in sunlight.Domestic and international scientific worker grinds ultraviolet light
Study carefully existing more than 200 years history, since first ultraviolet germicidal lamp of he doctor Li Shi utility model of Germany starts, ultraviolet light is killed
Bacterium technology is more widely used in more and more fields, especially at air disinfection, body surface sterilization and water
Reason sterilization aspect.
Fluorescent tube is lighted and drive usually using lamp tube drive circuit, by electric ballast, can when illumination starts,
Preheating filament in short time then generates transient high voltage and lights fluorescent tube；After illumination starting, electric ballast plays chokes work
With keeping the normal current of fluorescent tube.
As shown in Fig. 2, traditional lamp tube drive circuit is led to the high direct voltage behind the commercial power rectification 220V by inverter circuit
After crossing triode Q1 and Q2 half-bridge self-excitation, it is reverse into the high voltagehigh frequency alternating current of 40KHz or so, and then pass through inductance L2 and capacitor
The resonance of C5 generates instantaneous pressure, lights fluorescent tube (LP1, LP2), and after lighting, inductance L2 is driving fluorescent tube just as choke induction
Often work.
It is equally by 220V mains-supplied, after rectification, by carrying half-bridge driven pipe in Scheme shown in Fig. 3
The L6569 for managing unit drives two metal-oxide-semiconductors Q1 and Q2 to generate the high-frequency and high-voltage alternating current of 40KHz, by inductance L1 and capacitor
The resonance point bright light pipe pipe of C7, C8.
In addition, some small-power (5W or less) lamp tube drive circuits are low-voltage (1.5~12V) by two triodes
Inversion boosting is after self-excitation to drive fluorescent tube.As shown in figure 4, two triodes form a push-pull type self-excited circuit, by rising
After pressure transformer, the high-frequency and high-voltage alternating current of 40KHz or so is generated, by lighting fluorescent tube after capacitor C2 current limliting.
But existing lamp tube drive circuit has the following deficiencies:
It (1) can be with the small light tube drive circuit of inversion boosting, due to the still triode self-excitation mostly of its inverter circuit
It boosts afterwards, working frequency follows load to change, and is difficult to be fixed on 40KHz or so driving fluorescent tube, lamp tube service life will be by serious
It influences；Once furthermore power improves, triode fever is serious to be easy damage.
(2) structure is complicated for existing lamp tube drive circuit, generallys use two triode self-excitations or integrated IC drives double MOS
Pipe does the switch topology of half-bridge driven.
Utility model content
For overcome the deficiencies in the prior art, the utility model devises a kind of using single power switch tube and frequency generation
The lamp tube drive circuit of device.
The utility model adopts the following technical solution realizes:
A kind of lamp tube drive circuit, including frequency generator, power switch tube and booster circuit,
The frequency generator is used to generate the control signal with fixed frequency；
The power switch tube is equipped with control terminal, first switch end and second switch end, and the control terminal connects the frequency
The output end of rate generator, the first switch end connect the booster circuit, and second switch end voltage is zero, the function
Rate switching tube on or off under the control of said control signal；
The booster circuit has input side and outlet side, and the input side of the booster circuit is series at the power switch
Between pipe and power supply, the outlet side of the booster circuit is used to export the driving voltage to the lamp tube power supply.
Further, the power switch tube is power MOS pipe, and the control terminal is grid, and the first switch end is
Drain electrode, the second switch end are source electrode.
Further, the frequency generator includes that chip and frequency setting circuit occur for frequency, and chip occurs for the frequency
Power connection end connects power supply, and the frequency setting circuit connects the frequency and chip occurs, and chip occurs for the frequency and frequency setting circuit produces
The raw control signal.
Further, the frequency setting circuit includes first resistor and the second capacitor, and one end of the first resistor connects frequency
The first input end of chip occurs for rate, and chip occurs for the other end and frequency of one end connection first resistor of second capacitor
Second input terminal, the other end ground connection of second capacitor.
Further, it is that chip occurs for 40KHz frequency that chip, which occurs, for the frequency.
Further, the power supply includes the first level and connecting terminal, and first level connects the connecting terminal
Anode.
Further, filter circuit is connected between the power connection end and power supply of the frequency generation chip.
Further, the booster circuit includes step-up transformer and third capacitor, and the third capacitor is parallel to described
The input terminal of step-up transformer.
Further, the booster circuit further includes resonance circuit, and the resonance circuit is connected to the defeated of step-up transformer
Out between side and fluorescent tube.
Further, the 4th capacitor is connected between the power connection end and ground terminal of the frequency generation chip.
Compared with prior art, the beneficial effect of the utility model preferred embodiment includes:
Using the frequency generator of fixed frequency, it ensure that frequency will not arbitrarily change, so that starting to fluorescent tube instantaneous
High pressure can be generated smoothly；Using single power MOS pipe structure, the complexity of circuit is greatly reduced, improve product can
Reduce the calorific value of circuit by property；Using low voltage power supply, Danger Electric shock risk is avoided, obtains the personal safety of operator
It ensures.
Detailed description of the invention
Fig. 1 is the schematic diagram of the lamp tube drive circuit of an embodiment of the present invention；
Fig. 2 is the schematic diagram of existing traditional tube driving circuit；
Fig. 3 is the schematic diagram of existing fluorescent tube drive integrated circult；
Fig. 4 is the schematic diagram of existing small light tube drive circuit.
Specific embodiment
In the following, being described further in conjunction with attached drawing and specific embodiment to the utility model, it should be noted that
Under the premise of not colliding, it can be formed in any combination between various embodiments described below or between each technical characteristic new
Embodiment.
As shown in Figure 1, the lamp tube drive circuit according to an embodiment of the present invention, preferred embodiment one includes frequency
Rate generator 10, power switch tube U2 and booster circuit 20,
Frequency generator 10 is used to generate the control signal with fixed frequency；
Power switch tube U2 is equipped with control terminal A, first switch end B and second switch end C, and control terminal A rate of connections occurs
The output end of device 10, first switch end B connection booster circuit 20, second switch end C voltage is zero, and power switch tube U2 is being controlled
On or off under the control of signal；
Booster circuit 20 has input side and outlet side, and the input side of booster circuit 20 is series at power switch tube U2 and electricity
Between source, the outlet side of booster circuit 20 is used to export the driving voltage powered to fluorescent tube Lamp.
Specifically, the implementation steps of the lamp tube drive circuit are as follows: first connect circuit, power supply is that frequency generator 10 provides
Operating voltage, frequency generator 10 generate control signal electric current very little, the electric current via frequency generator 10 output end
LO is exported to be amplified to power switch tube U2, and the duty cycle of control signal control power switch tube U2, control signal is preferred
For square-wave signal.Amplified electric current is that booster circuit 20 charges together with power supply, and booster circuit 20 simultaneously boosts power supply,
Booster circuit 20 reaches instantaneous high pressure 600-800V time point bright light pipe Lamp in driving voltage.
In the present embodiment, power switch tube U2 is power MOS pipe, and control terminal A is grid, and first switch end B is drain electrode, the
Two switch terminals C are source electrode.The utility model uses Sofe Switch scheme, i.e., when the voltage of the drain electrode of power switch tube U2 becomes 0
When, power switch tube U2 is opened, just to reduce the switching loss of power switch tube U2.Pliotron U2 is preferably N
Channel MOS tube, metal-oxide-semiconductor is using the STP75NF75 of the low on-resistance of ST company, and pressure voltage is up to 75V, maximum current 80A, significantly
Reduce calorific value.It is appreciated that other kinds of power tube can also be used in power switch tube U2 in the utility model.
In the present embodiment, frequency generator 10 includes that chip U1 and frequency setting circuit 11 occur for frequency, and chip U1 occurs for frequency
Power connection end VCC connection power supply, chip U1 occurs for 11 rate of connections of frequency setting circuit, and frequency occurs chip U1 and frequency setting circuit 11 and produces
Raw control signal.Frequency occurs chip U1 and generates fixed frequency, and frequency setting circuit 11 is adjusted the frequency.
In the present embodiment, frequency setting circuit 11 includes one end connection of first resistor R2 and the second capacitor C1, first resistor R2
The other end of one end connection first resistor R2 of the first input end RT, the second capacitor C1 of chip U1 occurs for frequency and frequency occurs
The other end of the second input terminal CT, the second capacitor C1 of chip U1 is grounded.Frequency occur chip U1 frequency be it is fixed, first
The fixed frequency that chip U1 occurs for the selection frequency of the value of resistance R2 and the second capacitor C1 is related.
In the present embodiment, it is that chip occurs for 40KHz frequency that chip U1, which occurs, for frequency.General lamp tube drive circuit using
The high voltagehigh frequency AC power supply of 40KHz or so, for fluorescent tube when 40KHZ or so works, stable luminescence, the utility model is using solid
Determine frequency frequency occur chip U1, ensure that frequency will not arbitrarily change so that fluorescent tube Lamp on startup can be smooth
Generate instantaneous high pressure.
In the present embodiment, power supply includes the first level and connecting terminal P1, and the first level connects the anode of connecting terminal P1.
Filter circuit is connected between the power connection end VCC and power supply of frequency generation chip U1.The voltage of first level is not more than 36V, excellent
It is selected as+12V voltage, the utility model is powered, high pressure Danger Electric shock risk is avoided, has ensured personal safety.It is understood that
Are as follows: the utility model is self-powered, when power supply deficiency also using connecting terminal P1 connection power supply.Filter circuit includes filtering
The anode connection power supply of inductance L1 and filter capacitor C2, filter capacitor C2, the cathode ground connection of filter capacitor C2.Filter inductance L1 with
Filter capacitor C2 plays the role of preventing power-supply fluctuation from interfering with the normal work that chip U1 occurs for frequency.
In the present embodiment, driving voltage includes the starting voltage of 600-800V, and booster circuit 20 includes step-up transformer T1
The input terminal of step-up transformer T1 is parallel to third capacitor C5, third capacitor C5.When booster circuit 20 is opened, step-up transformer
The input terminal of T1 charges, and the instantaneous high pressure of the output end output 600-800V of step-up transformer T1 lights fluorescent tube Lamp；It closes
When closing, step-up transformer T1 charges to first capacitor C5, and sinusoidal variations are presented in the drain voltage of power switch tube U2.Utilize third
The charge-discharge characteristic of capacitor C5 maintains 100-200V high pressure to keep fluorescent tube Lamp in running order, and third capacitor C5 is power switch
Pipe U2 reduces switching loss, to reduce the calorific value of circuit, can extend and maintain the lamplit time.
In the present embodiment, booster circuit 20 further includes resonance circuit, and resonance circuit is connected to the output of step-up transformer T1
Between end and fluorescent tube Lamp.Resonance circuit includes inductance L2 and the 4th capacitor C4, and inductance L2 is connected to the defeated of step-up transformer T1
Out between side and fluorescent tube Lamp, the 4th capacitor C4 is between the anode and cathode of fluorescent tube Lamp.Inductance L2 and the 4th capacitor C4
After resonance generation instantaneous high pressure lights fluorescent tube Lamp, inductance L2 plays choking effect, is able to maintain that the operating current of fluorescent tube Lamp.
In the present embodiment, the 4th capacitor C3 is connected between the power connection end VCC and ground terminal GND of frequency generation chip U1.
4th capacitor C3 is filter capacitor, for preventing current fluctuation from interfering with the normal work that chip U1 occurs for frequency.
Above embodiment is only preferred embodiments of the present invention, cannot be protected with this to limit the utility model
Range, the variation of any unsubstantiality that those skilled in the art is done on the basis of the utility model and replacement belong to
In the utility model range claimed.
Claims (10)
1. a kind of lamp tube drive circuit, which is characterized in that including frequency generator, power switch tube and booster circuit,
The frequency generator is used to generate the control signal with fixed frequency；
The power switch tube is equipped with control terminal, first switch end and second switch end, and the control terminal connects the frequency hair
The output end of raw device, the first switch end connect the booster circuit, and second switch end voltage is zero, and the power is opened
Close pipe on or off under the control of said control signal；
The booster circuit have input side and outlet side, the input side of the booster circuit be series at the power switch tube with
Between power supply, the outlet side of the booster circuit is used to export the driving voltage to the lamp tube power supply.
2. lamp tube drive circuit according to claim 1, which is characterized in that the power switch tube is power MOS pipe, institute
Stating control terminal is grid, and the first switch end is drain electrode, and the second switch end is source electrode.
3. lamp tube drive circuit according to claim 1, which is characterized in that the frequency generator includes that core occurs for frequency
Piece and frequency setting circuit, the power connection end that chip occurs for the frequency connect power supply, and the frequency setting circuit connects the frequency and core occurs
Piece, chip occurs for the frequency and frequency setting circuit generates the control signal.
4. lamp tube drive circuit according to claim 3, which is characterized in that the frequency setting circuit includes first resistor and
The first input end of chip, one end connection of second capacitor occur for two capacitors, one end rate of connections of the first resistor
Second input terminal of chip, the other end ground connection of second capacitor occur for the other end and frequency of first resistor.
5. lamp tube drive circuit according to claim 3, which is characterized in that it is 40KHz frequency that chip, which occurs, for the frequency
Chip occurs.
6. lamp tube drive circuit according to claim 1, which is characterized in that the power supply includes the first level and terminals
Son, first level connect the anode of the connecting terminal.
7. lamp tube drive circuit according to claim 6, which is characterized in that the power connection end and electricity of chip occur for the frequency
Filter circuit is connected between source.
8. lamp tube drive circuit according to any one of claims 1 to 7, which is characterized in that the booster circuit includes rising
Pressure transformer and third capacitor, the third capacitor are parallel to the input terminal of the step-up transformer.
9. lamp tube drive circuit according to claim 8, which is characterized in that the booster circuit further includes resonance circuit,
The resonance circuit is connected between the outlet side of step-up transformer and fluorescent tube.
10. lamp tube drive circuit according to claim 3, which is characterized in that the frequency occur the power connection end of chip with
The 4th capacitor is connected between ground terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820992780.6U CN208369926U (en) | 2018-06-26 | 2018-06-26 | A kind of lamp tube drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820992780.6U CN208369926U (en) | 2018-06-26 | 2018-06-26 | A kind of lamp tube drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208369926U true CN208369926U (en) | 2019-01-11 |
Family
ID=64926849
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820992780.6U Active CN208369926U (en) | 2018-06-26 | 2018-06-26 | A kind of lamp tube drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208369926U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108601186A (en) * | 2018-06-26 | 2018-09-28 | 深圳市同洁科技有限公司 | A kind of lamp tube drive circuit |
-
2018
- 2018-06-26 CN CN201820992780.6U patent/CN208369926U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108601186A (en) * | 2018-06-26 | 2018-09-28 | 深圳市同洁科技有限公司 | A kind of lamp tube drive circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101827488B (en) | Fluorescent lamp electronic ballast and lighting device | |
| CN102202441A (en) | Constant-current controller topology circuit powered directly by alternating current power supply for LED lighting lamp | |
| CN104168696A (en) | Compatible LED power circuit | |
| CN101447737B (en) | Constant power output direct current transforming circuit | |
| CN208369926U (en) | A kind of lamp tube drive circuit | |
| CN103108457B (en) | High-frequency driver of light-emitting diode (LED) lamp | |
| CN104507238A (en) | LED (light emitting diode) driving power supply without electrolytic capacitor | |
| CN204836755U (en) | Use electrodeless fluorescence lamp of adjusting luminance of frequency generator control duty cycle | |
| CN205160843U (en) | Turn over to swash formula LED drive circuit that adjusts luminance | |
| CN201438777U (en) | Electrodeless lamp high frequency generator circuit | |
| CN201438776U (en) | High-frequency generator circuit of electrodeless lamp | |
| CN108601186A (en) | A kind of lamp tube drive circuit | |
| CN204145795U (en) | Have APFC function without working frequency ripple wave LED streetlamp power source | |
| CN207427521U (en) | A kind of LED illumination replaces light source | |
| CN104735837A (en) | LED street lamp power supply without power frequency ripples and with APFC function | |
| CN205005320U (en) | Driving circuit of light -emitting diode (LED) fluorescent tube | |
| CN104918360B (en) | A kind of comprehensive protection circuit of LED power | |
| CN108521694B (en) | LED half-bridge circuit with feedback variable-frequency constant-current drive | |
| CN203151849U (en) | Energy-saving electronic ballast and light fixture | |
| CN206596269U (en) | Dimmable LED drive control circuit | |
| CN203104850U (en) | Light emitting diode (LED) lamp drive power supply adopting pulse width modulation (PWM) dimming | |
| CN208337933U (en) | A kind of Novel LED light driving circuit structure | |
| CN203057664U (en) | High-performance long-life fluorescent lamp electronic ballast | |
| CN201368366Y (en) | LED lighting energy-saving lamp device | |
| CN204652730U (en) | A kind of High Power Factor LED dimming driving circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |