CN104768314B - Fluorescence lamp electronic stabilizer - Google Patents
Fluorescence lamp electronic stabilizer Download PDFInfo
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- CN104768314B CN104768314B CN201410002963.5A CN201410002963A CN104768314B CN 104768314 B CN104768314 B CN 104768314B CN 201410002963 A CN201410002963 A CN 201410002963A CN 104768314 B CN104768314 B CN 104768314B
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Abstract
The invention discloses a kind of fluorescence lamp electronic stabilizer, it includes：One rectification circuit, an inverter circuit, a circuit of power factor correction, and a detection protection circuit.Wherein, the detection protection circuit is to detect the direct current that the rectification circuit is provided, and cuts off when the voltage of the direct current is less than a preset value electric connection between the control chip in the inverter circuit and the supply of all power supplys immediately.The present invention has the effect of the service life of extension fluorescent lighting fixture.
Description
Technical field
The present invention relates to the detection protection technique of fluorescence lamp electronic stabilizer.
Background technology
Fluorescent lamp has superior energy conservation characteristic, and traditional incandescent lamp has gradually been replaced and has turned into main flow light fixture.With tradition
Unlike incandescent lamp, fluorescent lamp must coordinate electric stabilizer to use, and use and produce the height electricity for making gas ionization in fluorescent lamp
Pressure.
Fig. 1 is the known schematic diagram of electric stabilizer 100.As illustrated, known electric stabilizer 100 be coupled to it is glimmering
Light lamp 110, including：One filter circuit 102, a rectification circuit 104, a circuit of power factor correction 106 and an inverter circuit
108.Wherein, filter circuit 102 can filter out the high-frequency noise in AC power；Rectification circuit 104 can be converted alternating current to directly
Stream electricity；Circuit of power factor correction 106 can improve power factor and reduce harmonic wave；And inverter circuit 108 can be used to produce fluorescence
High-frequency alternating current needed for lamp.It is worth noting that, when electrical power is off, the high-pressure electrolysis in circuit of power factor correction 106
Electric capacity can still continue to provide electric power to inverter circuit 108 and fluorescent lamp 110 during voltage is reduced.Consequently, it is possible to inverse
The voltage become on circuit 108 will be changed into capacity load (as shown in Figure 2), Jin Erzeng with current relationship from inductive load
Plus the risk that power semiconductor switch element and control chip are burned out in inverter circuit 108.
The content of the invention
In view of this, the present invention provides a kind of new fluorescence lamp electronic stabilizer, uses and avoids in known electric stabilizer
The problem of power semiconductor switch element and control chip of inverter circuit are easily burned out, and then extend the use longevity of fluorescent lighting fixture
Life.
The present invention provides a kind of fluorescence lamp electronic stabilizer, and it includes：One rectification circuit, to the low frequency that will be received
Alternating current is converted to a direct current；One inverter circuit, is coupled to a fluorescent lamp drive circuit, the direct current is converted into drive
One high-frequency alternating current of a dynamic fluorescent lamp；One circuit of power factor correction, is coupled to the rectification circuit, to improve fluorescent electronic
The power factor of stabilizer；And one detection protection circuit, the rectification circuit and the inverter circuit are coupled to, to detect this
The direct current that rectification circuit is provided, and the inverter circuit is cut off immediately when the voltage of the direct current is less than a preset value
Electric connection between one control chip and the supply of all power supplys, wherein all power supply supplies at least include the rectification circuit institute
The direct current provided.The present invention has the effect of the service life of extension fluorescent lighting fixture.
Brief description of the drawings
Fig. 1 is the known schematic diagram of electric stabilizer 100；
Voltage and current relationship figure when Fig. 2 is power-off on inverter 108；
Fig. 3 A are the circuit framework schematic diagram of the fluorescence lamp electronic stabilizer of the present invention；
Fig. 3 B are the fluorescence lamp electronic ballast circuit figure according to one embodiment of the invention；
Fig. 4 is the circuit diagram of the detection protection circuit 207 according to one embodiment of the invention.
Wherein, description of reference numerals is as follows：
100~electric stabilizer
102~filter circuit
104~rectification circuit
106~circuit of power factor correction
108~inverter circuit
110~fluorescent lamp
202~filter circuit
204~rectification circuit
206~circuit of power factor correction
207~detection protection circuit
208~inverter circuit
210~fluorescent lamp drive circuit
EC1, EC2~high-voltage electrolytic capacitor
282~inverter circuit control chip
272~trigger element
274~control unit
276~high voltage startup unit
R1~R8~resistance
C1, C2~electric capacity
Q1, Q2~transistor
ZD1, ZD2~Zener diode
A~k~node
Embodiment
Hereinafter introduce highly preferred embodiment of the present invention.Each embodiment is not used to limit to illustrate the principle of the present invention
The system present invention.The scope of the present invention is worked as to be defined by appended claim.
Fig. 3 A are the circuit framework schematic diagram of the fluorescence lamp electronic stabilizer of the present invention；And Fig. 3 B are real according to the present invention one
Apply the fluorescence lamp electronic ballast circuit figure of example.Reference picture 3A and Fig. 3 B, fluorescence lamp electronic stabilizer of the invention include：One filter
Wave circuit 202, a rectification circuit 204, a PFC (power factor correction, PFC) circuit 206, one
Detect protection circuit 207, an inverter circuit 208, and a fluorescent lamp drive circuit 210.Wherein, filter circuit of the invention
202 the high-frequency noise in AC power to be filtered out.The rectification circuit 204 of the present invention is coupled to the filter circuit 202, is used to
The alternating current of low frequency is converted into direct current, which part direct current will be by circuit of power factor correction 206 and by inversion electricity
Road 208 is converted to the high-frequency alternating current required for fluorescent lamp drive circuit 210, uses and lights fluorescent lamp, and Partial DC electricity will
It is provided to the control chip (control chip 282 as shown in Figure 3 B) in inverter circuit 208.The power factor school of the present invention
Positive circuit 206 is coupled to the rectification circuit 204, and purpose is improving the power factor of the integrated circuit of fluorescence lamp electronic stabilizer 200.
It is worth noting that, the high-voltage electrolytic capacitor that configures same with known technology is (as schemed in the circuit of power factor correction 206 of the present invention
Shown in 3B electric capacity EC1 and EC2), and the principal character of the present invention is to be to set up detection protection circuit 207, is made in mains
The direct current power supply of fast shut-off inverter circuit control chip during power withheld, is worked with stopping inverter circuit 208, goes forward side by side one
Step avoids inverter circuit 208 from being changed into capacity load by inductive load.Hereafter Fig. 2 and Fig. 4 will be coordinated to be described in detail the present invention's
Detect protection circuit 207.
Fig. 4 is the circuit diagram of the detection protection circuit 207 according to one embodiment of the invention.As shown in Fig. 3 A and Fig. 4, this hair
Bright detection protection circuit 207 is coupled to the rectification circuit 204, the circuit of power factor correction 206 and the inverter circuit 208
Between, its purpose is detecting the direct current that the rectification circuit 204 is provided, and stops supply direct current in the rectification circuit 204
The electric connection between a control chip 282 of the inverter circuit and the supply of all power supplys is cut off when electric.More particularly, inspection is worked as
Measure when knowing that the DC voltage that rectification circuit 204 exported is less than a preset value, detection protection circuit 207 of the invention can judge
The direct current of input will stop supplying, and the power supply supply of the control chip 282 of the inverter circuit 208 be cut immediately, it is to avoid inversion
The continuous firing of circuit 208 and enter capacity load, produce pulse current and to the power semiconductor switch of inverter circuit 208 member
Part and control chip and damage.
The detection protection circuit 207 of the present invention at least includes a trigger element 272 and a control unit 274.Fig. 4's
In embodiment, control unit 274 of the invention is mainly made up of a first transistor Q1, and it passes through resistance R3 couplings with an emitter-base bandgap grading
Startup power supply is connected to, and the power supply being coupled to a colelctor electrode by resistance R8 on the control chip of inverter circuit 208 is supplied
Pin position (as shown in Fig. 3 B chips 282).Due to above-mentioned annexation, electrically connecting between the controllable said elements of the first transistor Q1
Connect.As shown in Figure 3 B, when the power source is activated, triggers circuit 272 described later will turn on the first transistor Q1, and rectification circuit
204 voltages exported can constitute " startup path " by figure interior joint a, b, c, d and supply startup power supply to inverter circuit
The power supply supply pin position of 208 control chip 282.Then, after inverter circuit 208 starts, the dc source of control chip 282
" feedback path " being made up of node i, j, k, b, c, d is supplied to provide.It is worth noting that, control unit 274 can be by this
Trigger element 272 described later is invented to be controlled.
In the fig. 4 embodiment, trigger element 272 of the invention is main by a second transistor Q2 and the pole of Zener two
Body ZD1 is constituted.Wherein, second transistor Q2 colelctor electrode is coupled to the first crystal of control unit 274 by resistance R5
Pipe Q1 base stage, consequently, it is possible to the first transistor Q1 can be turned on second transistor Q2 conducting, and with the second crystal
Pipe Q2 cut-off and end.In the fig. 4 embodiment, Zener diode ZD1 negative pole is by being made up of resistance R1 and R2
Bleeder circuit is coupled to rectification circuit 204, and the partial pressure of Zener diode ZD1 positive pole then by being made up of resistance R6 and R7
Circuit is coupled to second transistor Q2 base stage., can be in parallel with resistance R2 by a ground capacity C2 in a preferable embodiment.
By being suitably designed resistance R1 and R2, it may be such that the voltage on Zener diode ZD1 negative terminals is normally provided in rectification circuit 204
Breakdown levels are reached during direct current.Now, second transistor Q2 and the first transistor Q1 can all be turned on so that control chip 282
It can receive after startup power supply, and control chip startup, then by direct current of the inverter circuit 208 through the feedback of " feedback path " institute
Source, is provided to the control chip 282 of inverter 208, now, inverter circuit 208 can normal point via the first transistor Q1
Bright fluorescent lamp.However, when the AC power of input is cut off, the direct current that rectification circuit 204 is provided can stop supplying therewith
Answer (that is, voltage is reduced to below a preset value), Zener diode ZD1 is ended by the triggering of rectification circuit 204 so that
Second transistor Q2 and the first transistor Q1 is closed, and then the control chip 282 and all power supplys of cut-out inverter circuit 208 immediately
(including the startup power supply that rectification circuit 204 is provided through " startup path ", and " feedback path " institute is passed through by inverter circuit 208
The dc source of offer) between electric connection.Again as shown in Figure 3 B, when power supply regular supply, what rectification circuit 204 was exported
The path that electric current can be constituted by node e, f, g, h is provided to second transistor Q2.However, when rectification circuit 204 stop it is defeated
When going out electric current, voltage on node h will rapid reduction and end Zener diode ZD1, cause second transistor Q2 and the
One transistor Q1 closing, so cut off node a, b, c, d constituted " startup path " supply startup power supply and node i,
The dc source feedback path that j, k, b, c, d are constituted.In this manner, control chip 282 can be suitable when power supply stops supplying
When be closed, it is to avoid because power supply persistently supply make the ongoing operation of chip 282 allow the voltage and current relationship of inverter circuit 208
Capacity load will be changed into from inductive load, power semiconductor switch element and control chip are damaged.This hair
It is bright thereby to reach the effect for extending the life-span that fluorescence of the present invention puts electric stabilizer.
In a preferable embodiment, as shown in figure 4, the detection protection circuit 207 of the present invention also includes a high voltage startup
Unit 276.The high voltage startup unit 276 of the present invention is coupled to the control unit 274 in detection protection circuit 207, in this preferably
In embodiment, the node b in Fig. 3 B is couple to.In the fig. 4 embodiment, high voltage startup unit 276 of the invention includes one the
A two Zener diode ZD2 and electric capacity C1.Wherein, the second Zener diode ZD2 is with a positive ending grounding, and is coupled with a negative terminal
, so can be first to the direct current (shown in the feedback path constituted such as node i, j, k) of 208 feedbacks of inverter circuit
Transistor Q1 input (i.e. provides a voltage level on node b).In addition, electric capacity C1 and the second Zener diode ZD2
It is in parallel.By the effect of the second Zener diode ZD2 in the high voltage startup unit 276, the present invention can be by the first transistor Q1
Input voltage can be limited under a specific voltage level, consequently, it is possible to the first transistor Q1 be can select low pressure-resistant element,
Reach the effect of reduction integrated circuit manufacturing cost.
It is worth noting that, for convenience of description, first and second transistor Q1 and Q2 in previous embodiment are with bipolarity
Exemplified by transistor (Bipolar Junction Transistor, BJT), however, those skilled in the art is it is to be understood that originally
The selection of transistor is not necessarily so limited in invention.For example, first and second transistor Q1 and Q2 in previous embodiment
Can also metal oxide semiconductcor field effect transistor (Metal-Oxide-Semiconductor Field-Effect
Transistor, MOSFET) substitute.In addition, those skilled in the art can be in appropriately designed previous embodiment resistance value and
Capacitance, and circuit layout is suitably changed according to the aforementioned principles of the present invention, use the entirety for causing fluorescence lamp electronic stabilizer
Electrical characteristic meets the requirement of various applications.
Though the present invention is disclosed as above with preferred embodiment, so it is not limited to the scope of the present invention, any this area
Technical staff, without departing from the spirit and scope of the present invention, when can do a little change and retouching, therefore the guarantor of the present invention
Shield scope is worked as to be defined depending on appended as defined in claim.
Claims (6)
1. a kind of fluorescence lamp electronic stabilizer, including：
One rectification circuit, received one alternating current is converted into a direct current；
One inverter circuit, is coupled to a fluorescent lamp drive circuit, the direct current is converted into the one high of one fluorescent lamp of driving
Frequency alternating current；And
One detection protection circuit, is coupled to the rectification circuit and the inverter circuit, is provided to detect the rectification circuit
The direct current, and when the voltage of the direct current is less than a preset value, the control chip in the inverter circuit is cut off with owning
Electric connection between power supply supply, wherein all power supply supplies at least include the direct current that the rectification circuit is provided,
Wherein the detection protection circuit includes：
One control unit, including a first transistor, are coupled to the power source supply end of the control chip of the inverter circuit；With
And
One trigger element, in addition to：
One second transistor, is coupled to the first transistor, and the wherein the first transistor is cut with the cut-off of the second transistor
Only；And
One first Zener diode, it is coupled to an output end of the rectification circuit with a negative terminal, and is coupled to this with an anode
Second transistor；
Wherein, when the voltage of the direct current is less than a preset value, second transistor cut-off, and the first transistor cut-off.
2. fluorescence lamp electronic stabilizer as claimed in claim 1, wherein, the detection protection circuit is low in the voltage of the direct current
All power supply supplies cut off when a preset value include giving the direct current of the control chip by the inverter circuit institute feedback.
3. fluorescence lamp electronic stabilizer as claimed in claim 1, wherein the detection protection circuit include：
One high voltage startup unit, is coupled to the control unit of the detection protection circuit, to defeated by the one of the first transistor
Enter voltage to be limited under a specific voltage level.
4. fluorescence lamp electronic stabilizer as claimed in claim 3, wherein the high voltage startup unit also include：
One second Zener diode, it is coupled to the direct current of the inverter circuit institute feedback with a negative terminal, and with a positive ending grounding；
And
One electric capacity, it is in parallel with the second Zener diode.
5. fluorescence lamp electronic stabilizer as claimed in claim 1, in addition to a circuit of power factor correction, are coupled to the rectification
Circuit, the power factor to improve fluorescent electronic stabilizer.
6. fluorescence lamp electronic stabilizer as claimed in claim 1, in addition to a filter circuit, are coupled to the rectification circuit and one
Between civil power, wherein the civil power provides a low frequency ac, and the filter circuit is to filter out the high frequency in the low frequency ac
Noise.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410002963.5A CN104768314B (en) | 2014-01-03 | 2014-01-03 | Fluorescence lamp electronic stabilizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410002963.5A CN104768314B (en) | 2014-01-03 | 2014-01-03 | Fluorescence lamp electronic stabilizer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104768314A CN104768314A (en) | 2015-07-08 |
| CN104768314B true CN104768314B (en) | 2017-10-31 |
Family
ID=53649825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410002963.5A Expired - Fee Related CN104768314B (en) | 2014-01-03 | 2014-01-03 | Fluorescence lamp electronic stabilizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104768314B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010081570A1 (en) * | 2009-01-16 | 2010-07-22 | Osram Gesellschaft mit beschränkter Haftung | Detector circuit and method for controlling a fluorescent lamp |
| CN203057664U (en) * | 2012-12-10 | 2013-07-10 | 张新安 | High-performance long-life fluorescent lamp electronic ballast |
-
2014
- 2014-01-03 CN CN201410002963.5A patent/CN104768314B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010081570A1 (en) * | 2009-01-16 | 2010-07-22 | Osram Gesellschaft mit beschränkter Haftung | Detector circuit and method for controlling a fluorescent lamp |
| CN203057664U (en) * | 2012-12-10 | 2013-07-10 | 张新安 | High-performance long-life fluorescent lamp electronic ballast |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104768314A (en) | 2015-07-08 |
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| SE01 | Entry into force of request for substantive examination | ||
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171031 Termination date: 20190103 |