CN205142637U - Electronic ballast circuit - Google Patents
Electronic ballast circuit Download PDFInfo
- Publication number
- CN205142637U CN205142637U CN201520888321.XU CN201520888321U CN205142637U CN 205142637 U CN205142637 U CN 205142637U CN 201520888321 U CN201520888321 U CN 201520888321U CN 205142637 U CN205142637 U CN 205142637U
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- CN
- China
- Prior art keywords
- control chip
- resistance
- bridge rectifier
- vcc
- capacitance
- 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.)
- Expired - Fee Related
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
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- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
The utility model relates to an electronic ballast circuit, including being used for opening the brightness circuit part with what the electric main rectifying and wave -filtering was the rectifying and wave -filtering part that is close the DC voltage, was used for control chip and peripheral auxiliary circuit part, the load that provides the high -frequency oscillation and preheat the load and is used for lighting the load. The utility model discloses a control chip replaces traditional magnetic ring drive, and the frequency of operation of whole lamp is stable, and circuit structure is simple.
Description
Technical field
The utility model relates to a kind of electric ballast, a kind of novel high-power chip circuit particularly in electric ballast.
Background technology
Traditional electricity-saving lamp is driven by magnet ring.And magnet ring is magnetic material, there is unsteadiness, thus cause the power of whole lamp and the deviation of frequency, affect the reliability of whole lamp.Particularly powerful electricity-saving lamp magnet ring deviation a little, have larger impact to whole lamp, reliability can be far short of what is expected.
Utility model content
The purpose of this utility model is, for the deficiencies in the prior art, provides that a kind of circuit structure is simple, operating frequency is stablized, the circuit of electronic ballast of adjustable warm-up time and pre-calorific intensity.
In order to realize above object, the utility model have employed following technical scheme:
A kind of circuit of electronic ballast, the point of incoming cables of power supply arranges inductance L 1 and electric capacity C9 forms L-type filter, the output of L-type filter connects the bridge rectifier BD1 be made up of diode D1, D2, D3, D4, and bridge rectifier comprises A, B, C, D tetra-outputs; Filter capacitor C0 is parallel with between B, D; Two output connection control chips of C0 and peripheral auxiliary circuits thereof, described control chip comprises the several link of VCC, RT, SW, PC, VB, HO, VS, L0; VCC end is connected with chip capacity C1, and RT end is connected with oscillating capacitance C2, is connected with oscillation resistance R0 between VCC end and RT end; SW end connects preheat capacitor C3; PC end connects pre-thermal resistance R5, and pre-thermal resistance R5 is in parallel with buffer capacitor C4; Parallel diode D5, D6 between B, D end of bridge rectifier BD1, the negative electrode of D6 is held with the VS of control chip by electric capacity C6 and is connected, the negative electrode of D6 is connected with D5 anode, the VCC end of the negative electrode connection control chip of D5, and the B of bridge rectifier BD1 holds tandem promoter resistance R1 and R2, R1, R2 hold with the VCC of control chip and are connected; The output of starting resistance R2 to be held with the VB of control chip by diode D7 and electric capacity C5 and is connected; Paralleling MOS pipe Q1, Q2 between B, D end of bridge rectifier BD1, the grid of Q1 is connected with the drain electrode of Q2, and the source electrode of Q1 is held with the HO of control chip by resistance R4 and is connected, and the source electrode of Q2 is held with the LO of control chip by resistance R3 and is connected; The VS end of control chip connects starting circuit and load; Starting circuit comprises filament capacitance C8, capacitance C7 and choke T1, and filament capacitance C8 is in parallel with load, and the VS end of control chip is connected with load with capacitance C7 by choke T1.
The circuit of electronic ballast of said structure, has the following advantages: 1, by the integration of control chip and metal-oxide-semiconductor, can simplify circuit structure, improves the operating efficiency of circuit element; 2, use control chip to replace magnet ring to drive, avoid the magnetic interference of magnet ring, make the operating frequency deviation of circuit of electronic ballast little, Circuits System is more stable; 3, conveniently adjusted warm-up time and pre-calorific intensity.
Accompanying drawing explanation
Fig. 1 is the utility model circuit theory diagrams.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.
Circuit of electronic ballast as shown in Figure 1, comprise for by electric main rectifying and wave-filtering in close to direct voltage rectifying and wave-filtering part, be used for providing the higher-order of oscillation and the control chip of pre-heat load and peripheral auxiliary circuits part, load and be used for lighting the starting circuit part of load.
The point of incoming cables of power supply arranges inductance L 1 and electric capacity C9 forms L-type filter, and its function is the electromagnetic interference alleviating high-frequency inverter circuit generation.The output of L-type filter connects rectifying and wave-filtering part, comprises bridge rectifier BD1 and filter capacitor C0.Bridge rectifier BD1 is made up of diode D1, D2, D3, D4, and the anode of D1 is connected with the negative electrode of D2, and the negative electrode of D1 is connected with the negative electrode of D3, and the anode of D2 is connected with the anode of D4, and the anode of D3 is connected with the negative electrode of D4.Bridge rectifier BD1 comprises A, B, C, D tetra-outputs, wherein the junction of diode D1 and D3 is the C end of bridge rectifier, the junction of diode D2 and D4 is the D end of bridge rectifier, the junction of diode D4 and D3 is the A end of bridge rectifier, and the junction of diode D3 and D1 is the B end of bridge rectifier.The electric main of input is transferred to direct current and exports by bridge rectifier BD1, and B, D end of filter capacitor C0 and BD1 is in parallel, and the smoothing filtering of voltage that rectification exports by filter capacitor C0, makes it close to direct voltage.
Control chip comprises the several link of VCC, RT, SW, PC, VB, HO, VS, L0, GND.The VCC end of control chip IC is the power input of chip, has three-line to hold with VCC and be connected in circuit: one is that VCC holds and is directly connected with chip capacity C1; Two be bridge rectifier BD1 B, D end between parallel diode D5, D6, the negative electrode of D6 is held with the VS of control chip by electric capacity C6 and is connected, and the negative electrode of D6 is connected with D5 anode, and the VCC of the negative electrode connection control chip of D5 holds; Three is that the B of bridge rectifier BD1 holds tandem promoter resistance R1 and R2, and R1, R2 hold with the VCC of control chip and be connected.RT end is connected with oscillating capacitance C2, is connected with oscillation resistance R0 between VCC end and RT end, regulates frequency of oscillation by regulating oscillating capacitance C2 and oscillation resistance R0.SW end connects preheat capacitor C3, is controlled the length of warm-up time by SW end.PC end connects pre-thermal resistance R5, and pre-thermal resistance R5 is in parallel with buffer capacitor C4, and the size of pre-thermal resistance R5 determines the size of preheat curent, and buffer capacitor C4 is for regulating the intensity of preheat curent.The VB end of control chip is for high-end gate-drive floating power end, and the output of starting resistance R2 to be held with the VB of control chip by diode D7 and electric capacity C5 and is connected.The HO end of control chip is high-end gate-drive output, driven by metal-oxide-semiconductor Q1, the LO end of control chip is the output of low side gate-drive, driven by metal-oxide-semiconductor Q2, metal-oxide-semiconductor Q1, Q2 are connected between B, D end of bridge rectifier BD1, the grid of Q1 is connected with the drain electrode of Q2, and the source electrode of Q1 is held with the HO of control chip by resistance R4 and is connected, and the source electrode of Q2 is held with the LO of control chip by resistance R3 and is connected.The VS end of control chip IC connects starting circuit and load, starting circuit comprises filament capacitance C8, capacitance C7 and choke T1, filament capacitance C8 is in parallel with load is load supplying, the VS end of control chip is connected with load with capacitance C7 by choke T1, for starting circuit provides the starter high pressure lighted needed for load.
In foregoing circuit, the course of work of control chip is as follows: resistance R1, R2 are starting resistance, IC is flowed into as starting current by an electric current part of starting resistance R1, R2, remainder charges to chip capacity C1, and starting resistance R1, R2 can provide enough large electric current for IC.Once VCC holds capacitance voltage to arrive IC start thresholding, then IC starts working.Because IC operating current increases, chip capacity C1 starts electric discharge.After IC starts working, HO, LO vibrate, and VS end exports high-voltage square-wave, and interdischarge interval and VS hold the electric capacity C6 that is connected by the high-voltage square-wave of output for being divided into electric current, and through diode D5, differential current are imported chip power supply, and the D6 connected with D5 is for voltage stabilizing.After IC starts working, can first rest on initiation culture several ms, then be reduced to the action that pre-heat frequency carries out fluorescent tube preheating.Warm-up time can be determined by the electric capacity being connected to SW end, and capacitance is higher, and warm-up time is longer; Otherwise then warm-up time is shorter.Representative value is 0.47uF, is about 0.6 second warm-up time.Preheat curent can be determined by the resistance R5 being connected to PC end, and resistance is larger, then more close to operating frequency, then preheat curent is larger; Resistance is less, then preheat curent is less, and the scope of resistance value is between 2.2M Ω ~ 200K Ω.When warm-up time is after reaching, IC can start to reduce frequency of operation, until till frequency of operation equals the operating frequency set by R0, C2.Before fluorescent tube is not also pulled the trigger and lighted, resonance is the state being in high q-factor, if now the operating frequency of IC is more close to resonance frequency, then can produce higher voltage in fluorescent tube two side, if during voltage height to degree, fluorescent tube has aura phenomenon.If voltage is high again, then fluorescent tube will be lit.Now lamp current produces, and resonance is then become the state of low reactance-resistance ratio by high q-factor, lamp current is then by resonant inductance institute chokes.
This circuit instead of traditional magnet ring by chip and drives, and magnet ring is magnetic material, and deviation can be larger, and the performance of magnet ring is understood variation with temperature and changes, thus cause the frequency meeting of whole lamp unstable; Chip does not then have this problem, whole modulation frequency can control one among a small circle in fluctuation, than magnet ring drive stablize many.And circuit is simple, circuit cost aspect is about than 5% of traditional circuit, and its reliability and cost of labor are saved much especially.
Claims (1)
1. a circuit of electronic ballast, it is characterized in that, the point of incoming cables of power supply arranges inductance L 1 and electric capacity C9 forms L-type filter, and the output of L-type filter connects the bridge rectifier BD1 be made up of diode D1, D2, D3, D4, and bridge rectifier comprises A, B, C, D tetra-outputs; Filter capacitor C0 is parallel with between B, D; Two output connection control chips of C0 and peripheral auxiliary circuits thereof, described control chip comprises the several link of VCC, RT, SW, PC, VB, HO, VS, L0; VCC end is connected with chip capacity C1, and RT end is connected with oscillating capacitance C2, is connected with oscillation resistance R0 between VCC end and RT end; SW end connects preheat capacitor C3; PC end connects pre-thermal resistance R5, and pre-thermal resistance R5 is in parallel with buffer capacitor C4; Parallel diode D5, D6 between B, D end of bridge rectifier BD1, the negative electrode of D6 is held with the VS of control chip by electric capacity C6 and is connected, the negative electrode of D6 is connected with D5 anode, the VCC end of the negative electrode connection control chip of D5, and the B of bridge rectifier BD1 holds tandem promoter resistance R1 and R2, R1, R2 hold with the VCC of control chip and are connected; The output of starting resistance R2 to be held with the VB of control chip by diode D7 and electric capacity C5 and is connected; Paralleling MOS pipe Q1, Q2 between B, D end of bridge rectifier BD1, the grid of Q1 is connected with the drain electrode of Q2, and the source electrode of Q1 is held with the HO of control chip by resistance R4 and is connected, and the source electrode of Q2 is held with the LO of control chip by resistance R3 and is connected; The VS end of control chip connects starting circuit and load; Starting circuit comprises filament capacitance C8, capacitance C7 and choke T1, and filament capacitance C8 is in parallel with load, and the VS end of control chip is connected with load with capacitance C7 by choke T1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520888321.XU CN205142637U (en) | 2015-11-09 | 2015-11-09 | Electronic ballast circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520888321.XU CN205142637U (en) | 2015-11-09 | 2015-11-09 | Electronic ballast circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205142637U true CN205142637U (en) | 2016-04-06 |
Family
ID=55628383
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520888321.XU Expired - Fee Related CN205142637U (en) | 2015-11-09 | 2015-11-09 | Electronic ballast circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205142637U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108075626A (en) * | 2016-11-18 | 2018-05-25 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic compatibility filter circuit, DC power supply and household electrical appliance |
-
2015
- 2015-11-09 CN CN201520888321.XU patent/CN205142637U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108075626A (en) * | 2016-11-18 | 2018-05-25 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic compatibility filter circuit, DC power supply and household electrical appliance |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 311113 568 Huabao street, Qian Yuan Town, Deqing County, Huzhou, Zhejiang Patentee after: Zhejiang Yibo high tech technology Co., Ltd. Address before: 311112 Liangyuan street, Liangzhu street, Yuhang District, Hangzhou, Zhejiang, 326 Patentee before: Hangzhou Eboylamp Electronics Co.,Ltd. |
|
| 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: 20160406 Termination date: 20191109 |