CN201976309U - Startup circuit of HID (high intensity discharge) lamp - Google Patents
Startup circuit of HID (high intensity discharge) lamp Download PDFInfo
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- CN201976309U CN201976309U CN2011200527030U CN201120052703U CN201976309U CN 201976309 U CN201976309 U CN 201976309U CN 2011200527030 U CN2011200527030 U CN 2011200527030U CN 201120052703 U CN201120052703 U CN 201120052703U CN 201976309 U CN201976309 U CN 201976309U
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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
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- 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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Abstract
The utility model provides a startup circuit of an HID (high intensity discharge) lamp, which comprises a trigger control circuit, a resonant branch and a vibration stoppage control branch. Since the startup circuit is formed with simple semiconductor components, the utility model has the advantages that the startup circuit has a simple structure and a low cost, and ignition can be carried out effectively.
Description
Technical field
The utility model relates to HID lamp field, relates more specifically to be used for the start-up circuit of HID lamp.
Background technology
High-intensity gas discharge lamp (hereinafter to be referred as the HID lamp) is owing to have advantages such as luminous intensity height, light efficiency height, color rendering are good, long-life, and is widely used.The HID lamp utilizes electric ballast to drive, and electric ballast is than traditional Inductive ballast, can make that efficient is higher, the illumination effect of lamp and the life-span is optimized more, weight reduction greatly.
Fig. 1 is the block diagram of structure of the conventional electrical ballast of diagram HID lamp.As shown in fig. 1, common power-frequency voltage (for example 220 volts of alternating currents) obtains direct voltage V after rectification, filtering and Active PFC module 120 are handled
DC, this direct voltage V
DCBe imported into full-bridge or half-bridge circuit 130.Under the control of MCU (Micro Control Unit, micro-control unit) or IC 140, full-bridge or half-bridge circuit 130 are with direct voltage V
DCBe reverse into the alternating voltage V of preset frequency
ACAlternating voltage V
ACBe provided for HID lamp 160 so that its operation.Firing circuit 150 is responsible for providing desired high-voltage pulse that HID lamp 160 is lighted under the control of MCU, IC 140 after ballast powers on, and HID lamp 160 is lighted back firing circuit 150 and will be cut off, and no longer participates in the work of main circuit.
Fig. 2 is the rough schematic view of start-up circuit of the conventional electrical ballast of HID lamp.As shown in Figure 2, one end of start-up circuit (indication by dashed box) is connected to an output of full-bridge or half-bridge circuit via ballast inductance L3, the other end of start-up circuit is connected to the HID lamp, and the other end of HID lamp links to each other with another output of full-bridge or half-bridge circuit.Start-up circuit is made up of elements such as starting inductance or transformer L4, other start-up circuit part, MCU or IC.When powering on, under the effect of MCU or IC, start-up circuit is lighted the HID lamp at the end generation high-voltage pulse that L4 connects the HID lamp.
Known as those skilled in the art, the start-up circuit of the electric ballast of HID lamp must be able to provide the pulse output of following feature:
1) has and be generally 1 to width, the peak value about 1 to 10KV of several microseconds.Cold conditions HID lamp can start like this, normally.
2) in the quite a long time or in unlimited time, pulse must be able to repeat.Because lamp if heat, just need be cooled to be enough to the puncture.If lamp then needs a plurality of pulse cumlative energies owing to reason such as aging causes the energy shortage of a pulse to transform to arc light with aura.
3) property at interval must be arranged between the pulse or between the pulse band, can not be continuous always, otherwise bring hidden danger can for the safety of ballast, very big to the injury of lamp electrode simultaneously.
In order to obtain to have the pulse of above-mentioned feature, MCU that need adopt in the electric ballast of HID lamp or IC have complicated controlled function, thereby cause this MCU or IC costliness.
Therefore, need a kind of improved start-up circuit that is used for the HID lamp.
The utility model content
In order to solve above-mentioned shortcoming of the prior art and problem the utility model is proposed.
The utility model can solve above-mentioned at least shortcoming, and it can be made up of simple semiconductor element, has advantage simple in structure, with low cost, that can effectively light a fire.
According to an aspect of the present utility model, a kind of start-up circuit of the HID of being used for lamp is provided, it is characterized in that comprising: trigger the control branch road, comprise by first resistance (R1), first rc charging circuit (R1C1) that first electric capacity (C1) is formed, the one DIAC (diac) device (D4), second resistance (R2), one end of a wherein said DIAC device (D4) is connected described first resistance (R1), between described first electric capacity (C1), its other end is connected with an end of described second resistance (R2), and the other end of described second resistance (R2) is connected with the grid of the following MOS transistor (Q3) of full-bridge or half-bridge circuit; The resonance branch road is connected between described full-bridge or the half-bridge circuit, comprises the resonant circuit of being made up of inductance and second electric capacity (C4); And failure of oscillation control branch road, comprise first diode (D3), by the 3rd resistance (R4), second rc charging circuit (R4C3) that the 3rd electric capacity (C3) is formed, MOS transistor (Q1), one end of wherein said first diode (D3) is connected to the non-earth terminal of the auxilliary winding of described inductance, the other end links to each other with described the 3rd resistance (R4), the grid of described MOS transistor (Q1) is connected to described the 3rd resistance (R4) via connecting control module, between described the 3rd electric capacity (C3), and the drain electrode of described MOS transistor (Q1) is respectively via second diode (D1), the 3rd diode (D2) is connected to the non-earth terminal and the described grid of MOS transistor (Q3) down of described first electric capacity (C1).
Described inductance can comprise first inductance (L2), and an end of described first inductance (L2) is connected to an output of described full-bridge or half-bridge circuit via ballast inductance (L3), and its other end is connected to described HID lamp.
Described inductance can comprise first inductance (L2) and second inductance (L3), the main winding of described first inductance (L2) and described second inductance (L1) is connected in series and its auxilliary winding is connected in parallel, first inductance (L2) that is connected and an end of second inductance (L1) are connected to an output of described full-bridge or half-bridge circuit, and its other end is connected to described HID lamp.And described first inductance (L2) and described second inductance (L1) can be identical inductance.
The 3rd rc charging circuit (R3C2) that described connection control module can comprise the 2nd DIAC device (D5), be made up of the 4th resistance (R3), the 4th electric capacity (C2), one end of wherein said the 2nd DIAC device (D5) is connected between described the 3rd resistance (R4), described the 3rd electric capacity (C3), its other end is connected with an end of described the 4th resistance (R3), and the other end of described the 4th resistance (R3) is connected with the non-earth terminal of described the 4th electric capacity (C2) and the grid of described MOS transistor (Q1).Described start-up circuit can further comprise the 5th resistance (R8) that is connected in parallel with described the 4th electric capacity (C2).
Fast response circuit and counter that described connection control module can comprise the 2nd DIAC device (D5), the 5th resistance (R8), be made up of the 6th resistance (R6) and the 5th electric capacity (C5), one end of wherein said the 2nd DIAC device (D5) is connected between described three resistance (R4), described the 3rd electric capacity (C3), its other end is connected with an end of described the 5th resistance (R8), and the other end of described the 5th resistance (R8) is connected with the non-earth terminal of the 6th resistance (R6) and the grid of described MOS transistor Q1 with the 5th electric capacity (C5).
Described start-up circuit may further include self-excitation-bridge drive IC module, and described self-excitation-bridge drive IC module is connected between the grid of described down MOS transistor (Q3) of described second resistance (R2) and described full-bridge or half-bridge circuit.。
Description of drawings
By the description of carrying out below in conjunction with accompanying drawing, above-mentioned and other aspects of one exemplary embodiment more of the present utility model, feature and advantage will become apparent to those skilled in the art, wherein:
Fig. 1 is the block diagram of structure of the conventional electrical ballast of diagram HID lamp;
Fig. 2 is the rough schematic view of start-up circuit of the conventional electrical ballast of HID lamp.
Fig. 3 is the circuit diagram of diagram according to the start-up circuit of an embodiment of the present utility model;
Fig. 4 is the circuit diagram of diagram according to the start-up circuit of another embodiment of the present utility model;
Fig. 5 is the circuit diagram of diagram according to the start-up circuit of another embodiment of the present utility model;
Fig. 6 is the circuit diagram of diagram according to the start-up circuit of another embodiment of the present utility model;
Fig. 7 is the circuit diagram of diagram according to the start-up circuit of another embodiment of the present utility model; And
Fig. 8 is used to illustrate the oscillogram that obtains by according to start-up circuit of the present utility model.
Embodiment
By following detailed description by accompanying drawing, will more easily understand the utility model, identical label is specified the unit of same structure in the whole text.Describing below to help complete understanding one exemplary embodiment of the present utility model with reference to the accompanying drawings is provided.It comprises various details to help understanding, and they should be thought it only is exemplary.Therefore, those of ordinary skills will be appreciated that, can make various changes and modification to the embodiments described herein, and can not deviate from scope and spirit of the present utility model.Equally, for clarity and conciseness, omitted description to known function and structure.
Term only is used to describe the purpose of specific embodiment as used herein, and is not intended to become to restriction of the present utility model.Unless otherwise defined, otherwise as used herein all terms (comprising technology and scientific terminology) have with the utility model under the identical meaning generally understood of those skilled in the art.
Describe the utility model below with reference to the accompanying drawings in detail.
Fig. 3 illustrates the circuit diagram according to the start-up circuit 100 of an embodiment of the present utility model.In Fig. 3, start-up circuit 100 is indicated by dashed box.Part outside frame of broken lines is full-bridge or half-bridge circuit part.Because the structure of full-bridge or half-bridge circuit is identical as the structure of the full-bridge that uses in the conventional electrical ballast or half-bridge circuit, so omit detailed description at this.And those skilled in the art also can adopt full-bridge or half-bridge circuit with appropriate structuring according to principle of the present utility model.
Start-up circuit 100 comprises triggering controls branch road, resonance branch road, failure of oscillation control branch road.
Described triggering control branch road comprises rc charging circuit R1C1, DIAC device D4, the resistance R of being made up of resistance R 1, capacitor C 12, wherein the end of DIAC device D4 is connected between resistance R 1, the capacitor C 1, its other end is connected with an end of resistance R 2, and the other end of resistance R 2 is connected with the grid of the following MOS transistor Q3 of full-bridge or half-bridge circuit.
The resonance branch road comprises the resonant circuit of being made up of inductance L 2 and capacitor C 4.The resonance branch road is connected between full-bridge or the half-bridge circuit.In execution mode shown in Figure 3, one end of resonance branch road is connected to an output of full-bridge or half-bridge circuit via ballast inductance L3, and its other end is connected to an end (other end of HID lamp links to each other with another output of full-bridge or half-bridge circuit) of HID lamp.Known as those skilled in the art: for the HID lamp, under voltage can the situation with gas breakdown, can the decisive factor that light lamp be the energy of pulse voltage; Pulsewidth does not need very greatly if the peak value of pulse that start-up circuit provides is very high, does not then need too high peak value otherwise pulsewidth is very big.The pulse broad that the resonant ignition mode that the utility model adopted produces, the energy foot is so peak value requires and can reduce.
Rc charging circuit R4C3, MOS transistor Q1 that failure of oscillation control branch road comprises diode D3, is made up of resistance R 4, capacitor C 3, wherein the end of diode D3 is connected to the non-earth terminal of the auxilliary winding of inductance L 2, the other end links to each other with rc charging circuit R4C3, the grid of MOS transistor Q1 is connected to node between resistance R 4, the capacitor C 3 via connecting control module, and the drain electrode of MOS transistor Q1 is connected to the non-earth terminal of capacitor C 1 and the grid of following MOS transistor Q3 via diode D1, D2 respectively.
According to circuit structure described above, after ballast powered on, charging voltage was by 1 charging of 1 pair of capacitor C of resistance R.Though in the drawings charging voltage is shown the direct voltage VDC through over commutation, charging voltage is not limited thereto.For example, adopt in the ballast of passive power factor corrective, can press, and utilize diode etc. that the voltage of being got is filtered to be used as charging voltage from power taking on the APFC inductance in prime.When the voltage on the capacitor C 1 reaches the threshold voltage of DIAC device D4, DIAC device D4 conducting, will have voltage to be applied to the grid of the following MOS transistor Q3 of full-bridge or half-bridge circuit this moment, thereby make the starting of oscillation of resonance branch road.The resonance branch road is lit a lamp at the end generation high-voltage pulse of HID lamp.The voltage of the auxilliary winding of inductance L 2 is by diode D3 and 3 chargings of 4 pairs of capacitor C of resistance R in the resonant process of resonance branch road.Connect control module according to the grid output voltage signal of the change in voltage on the capacitor C 3 to metal-oxide-semiconductor Q1.When this voltage signal reaches predetermined value, metal-oxide-semiconductor Q1 will open, and be equivalent to will descend by force the grid voltage of MOS transistor Q3 to move ground to this moment, and the resonance branch road is with failure of oscillation, and the voltage on the capacitor C 1 is also bled off simultaneously.Then, charging voltage begins again capacitor C 1 charging is begun the startup of next circulation.So just form step resonant pulses band, met the sparking mode of HID lamp.
It should be noted that the value of each element that should suitably select start-up circuit so that the pulse output that is obtained meets the requirements.The first, should according to the drive characteristic of full-bridge or half-bridge circuit suitably select inductance L 2 and capacitor C 4 value so that the peak value of the resonance potential waveform that is obtained, cycle (being the pulsewidth of individual pulse) meet the requirements.The second, should suitably select the main winding of inductance L 2 and the turn ratio of auxilliary winding will no longer be participated in work so that light the back start-up circuit at the HID lamp.The 3rd, should be configured to export suitable voltage signal so that the width of pulse band meets the requirements with connecting control module.The 4th, should suitably select the value of resistance R 1, capacitor C 1 so that the width in gap meets the requirements between the pulse band.
According to the start-up circuit of this execution mode, can utilize simple semiconductor element to obtain effective firing pulse.
Fig. 4 is the circuit diagram of diagram according to the start-up circuit of another embodiment of the present utility model.Therefore identical among most of element among Fig. 4 and annexation thereof and Fig. 3 will omit the detailed description to them.Start-up circuit difference shown in start-up circuit shown in Fig. 4 and Fig. 3 only is the resonance branch road.
As shown in Figure 4, the main winding of inductance L 1 and inductance L 2 is connected in series and its auxilliary winding is connected in parallel.The inductance L 1 that is connected in series, L2 and C4 form series resonant circuit.Because the inductance L 1 that is connected in series, L2 are both as the ballast inductance, again as the igniting inductance, so the resonance branch road can not be directly connected to an output of full-bridge or half-bridge circuit via the ballast inductance, its other end is connected to an end (other end of HID lamp links to each other with another output of full-bridge or half-bridge circuit) of HID lamp.Preferably, inductance L 1 and inductance L 2 are identical inductance.
In inductance L 1 and inductance L 2 is under the situation of identical inductance, because the inductance of two series connection has been divided equally voltage, so greatly reduce for the requirement of withstand voltage of single inductance, its sensibility reciprocal also only need be half of startup inductance in the conventional ballast in addition.Therefore, the startup inductance that uses in the conventional ballast, its cost significantly descends.
Fig. 5 is the circuit diagram of diagram according to the start-up circuit of another embodiment of the present utility model.Therefore identical among most of element among Fig. 5 and annexation thereof and Fig. 4 will omit the detailed description to them.Start-up circuit difference shown in start-up circuit shown in Fig. 4 and Fig. 3 only is to connect control module.
As shown in Figure 5, connect the rc charging circuit R3C2 that control module comprises DIAC device D5, is made up of resistance R 3, capacitor C 2, wherein the end of DIAC device D5 is connected between resistance R 4, the capacitor C 3, its other end is connected with an end of resistance R 3, and the other end of resistance R 3 is connected with the non-earth terminal of capacitor C 2 and the grid of MOS transistor Q1.In addition, can also be between capacitor C 2 two ends parallel resistance R8.
According to start-up circuit shown in Figure 5, the voltage of the auxilliary winding of inductance is by diode D3 and 3 chargings of 4 pairs of capacitor C of resistance R in the resonant process of resonance branch road.Voltage on capacitor C 3 reaches the threshold voltage of DIAC device D5, the D5 conducting, thereby by 2 chargings of 3 pairs of capacitor C of resistance R, when the voltage on the capacitor C 2 reaches predetermined value, metal-oxide-semiconductor Q1 will open, be equivalent to will descend by force the grid voltage of MOS transistor Q3 to move ground to this moment, and the resonance branch road is with failure of oscillation, and the voltage on the capacitor C 1 is also bled off simultaneously.Then, charging voltage begins again capacitor C 1 charging is begun the startup of next circulation.So just form step resonant pulses band, met the sparking mode of HID lamp.
In the case, should suitably select the value of resistance R 4, capacitor C 3 and resistance R 3 and capacitor C 2 so that the width of pulse band meets the requirements.
Fig. 6 is the circuit diagram of diagram according to the start-up circuit of another embodiment of the present utility model.Therefore identical among most of element among Fig. 6 and annexation thereof and Fig. 4 and Fig. 5 will omit the detailed description to them.Start-up circuit difference shown in start-up circuit shown in Fig. 6 and Fig. 4 and Fig. 5 only is to connect control module.
As shown in Figure 6, connect fast response circuit and counter that control module comprises DIAC device D5, resistance R 3, is made up of resistance R 6 and capacitor C 5, wherein the end of DIAC device D5 is connected between resistance R 4, the capacitor C 3, its other end is connected with an end of resistance R 3, and the other end of resistance R 3 is connected with the non-earth terminal of capacitor C 5 and resistance R 6 and the grid of MOS transistor Q1.
According to start-up circuit shown in Figure 6, the voltage of the auxilliary winding of inductance is by diode D3 and 3 chargings of 4 pairs of capacitor C of resistance R in the resonant process of resonance branch road.Voltage on capacitor C 3 reaches the threshold voltage of DIAC device D5, DIAC device D5 conducting.The pulse counter all can be owing to fast response circuit be counted once when DIAC device D5 conducting, and counter is sent high voltage signal and given metal-oxide-semiconductor Q1 after reaching pre-determined number.Be equivalent to will descend by force the grid voltage of MOS transistor Q3 to move ground to this moment, and the resonance branch road is with failure of oscillation, and the voltage on the capacitor C 1 is also bled off simultaneously.
Fig. 7 is the circuit diagram of diagram according to the start-up circuit of another embodiment of the present utility model.Therefore identical among most of element among Fig. 7 and annexation thereof and Fig. 4 will omit the detailed description to them.Compare with the circuit shown in Fig. 4, the start-up circuit shown in Fig. 7 has only increased self-excitation-bridge drive IC module.This self-excitation-bridge drive IC module is connected between the grid of following MOS transistor Q3 of resistance R 2 and full-bridge or half-bridge circuit.
In this embodiment, full-bridge or half-bridge are to adopt IC to drive, the output signal that triggers control branch road, failure of oscillation control branch road can be used as the control signal of IC, controls the following MOS transistor Q3 of full-bridge or half-bridge circuit, thus the starting of oscillation and the failure of oscillation of control resonance branch road.
Fig. 8 is used to illustrate the oscillogram that obtains by according to start-up circuit of the present utility model.
As an example, under the situation of the specification shown in the table 1 below the main element according to start-up circuit of the present utility model adopts, value, obtain firing pulse waveform as shown in Figure 8.Significantly, it is listed that the specification that each element of the present utility model adopted, value are not limited to table 1, and those skilled in the art can adopt different specification, value to each element according to instruction of the present utility model.
| Element | Describe |
| R1 | RES-SMD 4×240kΩ，1206 |
| R2 | RES-MET-AX?47Ω，0207，600mW |
| R3 | RES-SMD 47Ω，0805 |
| R4 | RES-AX 220Ω，0207，600mW |
| R8 | RES-SMD 1MΩ，0805 |
| C?1 | CAP-CER-SMD?100NF，0805，X7R |
| C2，C3 | CAP-EL-RAD?10UF，50 |
| C4 | CAP-MKP-RAD?10NF，2000 |
| D1，D2，D3 | DIODE?600V，1A，250ns，DO41 |
| D4，D5 | DB3，32V，20us，D035 |
| L1，L2 | CHOKE?550uH-5-EF22/10/6-N87，64：5 |
| L3 | Drive?core，PG232A?T12.7*7.92*6.35C，2：20：20 |
| Q1 | MOSFET?60V，0.075A，7R5，SOT23 |
| Q2，Q3 | N-MOSFET?600V，7.3A，0R6，TO252 |
Table 1
Wave character as can be seen from Figure 8 as shown in table 2:
| The width of pulse band (μ s) | 200 |
| The pulsewidth of individual pulse (μ s) | 5.9 |
| The width in gap (s) between the pulse band | 3.2 |
| The peak value of pulse (KV) | 3.5 |
Table 2
Therefore, utilize the start-up circuit of this utility model, can obtain effective firing pulse.
Though this specification comprises many specific implementations details, but these details should be interpreted as the restriction of the scope of the content that maybe can advocate any utility model, and should be interpreted as can be specific to the description of the feature of the specific embodiment of specific utility model.
Above-mentioned embodiment does not constitute the restriction to the utility model protection range.Those skilled in the art should be understood that, depend on designing requirement and other factors, and various modifications, combination, sub-portfolio and alternative can take place.Any modification of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the utility model protection range.
Claims (8)
1. start-up circuit that is used for the HID lamp is characterized in that comprising:
Trigger the control branch road, comprise first rc charging circuit (R1C1), a DIAC device (D4), second resistance (R2) formed by first resistance (R1), first electric capacity (C1), one end of a wherein said DIAC device (D4) is connected between described first resistance (R1), described first electric capacity (C1), its other end is connected with an end of described second resistance (R2), and the other end of described second resistance (R2) is connected with the grid of the following MOS transistor (Q3) of full-bridge or half-bridge circuit;
The resonance branch road is connected between described full-bridge or the half-bridge circuit, comprises the resonant circuit of being made up of inductance and second electric capacity (C4); And
Failure of oscillation control branch road, comprise first diode (D3), by the 3rd resistance (R4), second rc charging circuit (R4C3) that the 3rd electric capacity (C3) is formed, MOS transistor (Q1), one end of wherein said first diode (D3) is connected to the non-earth terminal of the auxilliary winding of described inductance, the other end links to each other with described the 3rd resistance (R4), the grid of described MOS transistor (Q1) is connected to described the 3rd resistance (R4) via connecting control module, between described the 3rd electric capacity (C3), and the drain electrode of described MOS transistor (Q1) is respectively via second diode (D1), the 3rd diode (D2) is connected to the non-earth terminal and the described grid of MOS transistor (Q3) down of described first electric capacity (C1).
2. start-up circuit according to claim 1, wherein said inductance comprises first inductance (L2), one end of described first inductance (L2) is connected to an output of described full-bridge or half-bridge circuit via ballast inductance (L3), and its other end is connected to described HID lamp.
3. start-up circuit according to claim 1, wherein said inductance comprises first inductance (L2) and second inductance (L3), the main winding of described first inductance (L2) and described second inductance (L1) is connected in series and its auxilliary winding is connected in parallel, first inductance (L2) that is connected and an end of second inductance (L1) are connected to an output of described full-bridge or half-bridge circuit, and its other end is connected to described HID lamp.
4. start-up circuit according to claim 1, wherein, the 3rd rc charging circuit (R3C2) that described connection control module comprises the 2nd DIAC device (D5), is made up of the 4th resistance (R3), the 4th electric capacity (C2), one end of wherein said the 2nd DIAC device (D5) is connected between described the 3rd resistance (R4), described the 3rd electric capacity (C3), its other end is connected with an end of described the 4th resistance (R3), and the other end of described the 4th resistance (R3) is connected with the non-earth terminal of described the 4th electric capacity (C2) and the grid of described MOS transistor (Q1).
5. start-up circuit according to claim 4 further comprises the 5th resistance (R8) that is connected in parallel with described the 4th electric capacity (C2).
6. start-up circuit according to claim 1, wherein, described connection control module comprises the 2nd DIAC device (D5), the 5th resistance (R8), fast response circuit and the counter formed by the 6th resistance (R6) and the 5th electric capacity (C5), one end of wherein said the 2nd DIAC device (D5) is connected described three resistance (R4), between described the 3rd electric capacity (C3), its other end is connected with an end of described the 5th resistance (R8), and the other end of described the 5th resistance (R8) is connected with the non-earth terminal of the 6th resistance (R6) and the grid of described MOS transistor Q1 with the 5th electric capacity (C5).
7. start-up circuit according to claim 1, wherein, described start-up circuit further comprises self-excitation-bridge drive IC module, and described self-excitation-bridge drive IC module is connected between the grid of described down MOS transistor (Q3) of described second resistance (R2) and described full-bridge or half-bridge circuit.
8. start-up circuit according to claim 3, wherein, described first inductance (L2) is identical inductance with described second inductance (L1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200527030U CN201976309U (en) | 2011-02-28 | 2011-02-28 | Startup circuit of HID (high intensity discharge) lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200527030U CN201976309U (en) | 2011-02-28 | 2011-02-28 | Startup circuit of HID (high intensity discharge) lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201976309U true CN201976309U (en) | 2011-09-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200527030U Expired - Fee Related CN201976309U (en) | 2011-02-28 | 2011-02-28 | Startup circuit of HID (high intensity discharge) lamp |
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| CN (1) | CN201976309U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109379070A (en) * | 2018-12-20 | 2019-02-22 | 上海艾为电子技术股份有限公司 | A kind of analog switch start-up circuit and method |
-
2011
- 2011-02-28 CN CN2011200527030U patent/CN201976309U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109379070A (en) * | 2018-12-20 | 2019-02-22 | 上海艾为电子技术股份有限公司 | A kind of analog switch start-up circuit and method |
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