CN209497640U - For solving the circuit of light modulation minimum angles stroboscopic - Google Patents
For solving the circuit of light modulation minimum angles stroboscopic Download PDFInfo
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- CN209497640U CN209497640U CN201821965312.6U CN201821965312U CN209497640U CN 209497640 U CN209497640 U CN 209497640U CN 201821965312 U CN201821965312 U CN 201821965312U CN 209497640 U CN209497640 U CN 209497640U
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Abstract
The utility model discloses a kind of for solving the circuit of light modulation minimum angles stroboscopic, including brightness adjustment control chip U31, resistance RS52A, rectifier diode DS51, resistance RS52B, capacitor CS51, resistance RS51A and triode QS51；The one end resistance RS52A is electrically connected with the SNB pin of brightness adjustment control chip, the resistance RS52A other end is electrically connected with rectifier diode DS51 anode, rectifier diode DS51 cathode is electrically connected with capacitor CS51 and resistance RS52B respectively, resistance RS52B is electrically connected with the base stage of triode QS51, and resistance RS52A is electrically connected with the collector of triode QS51.The utility model has the characteristics that the oscillation zero passage that controllable silicon dimmer can be prevented in low-angle and solves stroboscopic problem.
Description
Technical field
The utility model relates to dimming driver debugging technique fields, dim minimum angle for solving more particularly, to one kind
Spend the circuit of stroboscopic.
Background technique
With the tight demand in the market of intelligent LED lighting product, various Width funtions, high-precision dimming driver are got over
To be more welcomed by customers.Likewise, client is also more important to the humanized demand of light modulation product.It is Width funtion, high-power controllable
Silicon dims chip and applies comparative maturity in market.In extra small power light modulation scene application, general power is no more than 5W tune below
CD-ROM driver demand is more and more.And controllable silicon dimmer itself is being solved on the jitter problem under extra small maintenance electric current, city
Popular brightness adjustment control chip does not have effective solution scheme nearly all on face.
Therefore, design it is a kind of for solve light modulation minimum angles stroboscopic circuit, just seem very necessary.
Utility model content
The utility model is to overcome in the prior art, and the brightness adjustment control chip of existing prevalence on the market can not be solved effectively
Certainly jitter problem of the controllable silicon dimmer under extra small maintenance electric current itself provides a kind of for solving light modulation minimum angles frequency
The circuit of sudden strain of a muscle.
To achieve the above object, the utility model uses following technical scheme:
It is a kind of for solve light modulation minimum angles stroboscopic circuit, including brightness adjustment control chip U31, resistance RS52A, rectification
Diode DS51, resistance RS52B, capacitor CS51, resistance RS51A and triode QS51；The one end resistance RS52A and brightness adjustment control core
The SNB pin of piece is electrically connected, and the resistance RS52A other end is electrically connected with rectifier diode DS51 anode, and rectifier diode DS51 is negative
Pole is electrically connected with capacitor CS51 and resistance RS52B respectively, and resistance RS52B is electrically connected with the base stage of triode QS51, resistance RS52A
It is electrically connected with the collector of triode QS51.
The utility model uses active mode of releasing, can be under minimum load power, by fictitious load mode, by one
Part electric current is bypassed, to increase the maintenance electric current of controllable silicon dimmer, keeps the normal work of controllable silicon dimmer.Its
In, the driving retention time of triode QS51 is determined by resistance RS52B resistance value and capacitor CS51 capacity.The utility model tool
The characteristics of having the oscillation zero passage that controllable silicon dimmer can be prevented in low-angle and solving stroboscopic problem.
Preferably, the emitter of triode QS51 is electrically connected with capacitor CS51.
Preferably, the utility model is additionally provided with RC filter circuit, RC filter circuit includes resistance RS31A, resistance
RS31B, resistance RS31C and capacitor CS31, resistance RS31A are electrically connected with the one end resistance RS31B, the resistance RS31B other end and electricity
The electrical connection of the one end RS31C is hindered, VIN pin of the resistance RS31C other end respectively with capacitor CS31 and brightness adjustment control chip U31 is electrically connected
It connects.
Preferably, the utility model is additionally provided with full bridge rectifier, full bridge rectifier include rectifier diode DS11,
Rectifier diode DS12, rectifier diode DS13 and rectifier diode DS14, anode and two poles of rectification of rectifier diode DS11
The cathode of pipe DS13 is electrically connected, and the anode of rectifier diode DS12 is electrically connected with the cathode of rectifier diode DS14, rectifies two poles
The cathode of pipe DS11 is electrically connected with the cathode of rectifier diode DS11 and RC filter circuit respectively, the anode of rectifier diode DS13
It is electrically connected respectively with the anode and capacitor CS51 of rectifier diode DS14.
Preferably, being additionally provided with resistance RS51B, resistance RS51C and resistance between resistance RS51A and triode QS51
RS51D, resistance RS51A, resistance RS51B, resistance RS51C and resistance RS51D are sequentially connected in series, the collector and electricity of triode QS51
Hinder RS51D electrical connection.
Therefore, the utility model has the following beneficial effects: the time for control of releasing is increased, to raise controllable silicon light modulation
The maintenance electric current of device prevents oscillation zero passage of the controllable silicon dimmer in low-angle, solves stroboscopic problem.
Detailed description of the invention
Fig. 1 is a kind of circuit diagram of the utility model；
Fig. 2 is a kind of circuit diagram of embodiment 1.
Specific embodiment
The utility model is further described with specific embodiment with reference to the accompanying drawing:
As shown in Figure 1 is a kind of for solving the circuit of light modulation minimum angles stroboscopic, including brightness adjustment control chip U31, electricity
Hinder RS52A, rectifier diode DS51, resistance RS52B, capacitor CS51, resistance RS51A and triode QS51；The one end resistance RS52A
It is electrically connected with the SNB pin of brightness adjustment control chip, the resistance RS52A other end is electrically connected with rectifier diode DS51 anode, rectification
Diode DS51 cathode is electrically connected with capacitor CS51 and resistance RS52B respectively, and resistance RS52B and the base stage of triode QS51 are electrically connected
It connects, resistance RS52A is electrically connected with the collector of triode QS51.The emitter of triode QS51 is electrically connected with capacitor CS51.
Wherein, the driving retention time of triode QS51 is determined by resistance RS52B resistance value and capacitor CS51 capacity.
Embodiment 1: as shown in Fig. 2, the utility model is additionally provided with RC filter circuit, RC filter circuit include resistance RS31A,
Resistance RS31B, resistance RS31C and capacitor CS31, resistance RS31A are electrically connected with the one end resistance RS31B, the resistance RS31B other end
It is electrically connected with the one end resistance RS31C, the resistance RS31C other end VIN pin with capacitor CS31 and brightness adjustment control chip U31 respectively
Electrical connection.
In addition, the utility model is additionally provided with full bridge rectifier, full bridge rectifier includes rectifier diode DS11, rectification
Diode DS12, rectifier diode DS13 and rectifier diode DS14, the anode and rectifier diode of rectifier diode DS11
The cathode of DS13 is electrically connected, and the anode of rectifier diode DS12 is electrically connected with the cathode of rectifier diode DS14, rectifier diode
The cathode of DS11 is electrically connected with the cathode of rectifier diode DS11 and RC filter circuit respectively, the anode point of rectifier diode DS13
It is not electrically connected with the anode and capacitor CS51 of rectifier diode DS14.
In addition, resistance RS51B, resistance RS51C and resistance RS51D are additionally provided between resistance RS51A and triode QS51, electricity
Resistance RS51A, resistance RS51B, resistance RS51C and resistance RS51D are sequentially connected in series, the collector and resistance RS51D of triode QS51
Electrical connection.
The utility model concrete application working method in embodiment 1 and principle are as follows:
Using controllable silicon dimmer, AC voltage after cut phase, through in full bridge rectifier rectifier diode DS11,
Envelope DC-BUS line voltage is formed after DS12, DS1 and DS14 rectification, controllable silicon dimmer adjusts the waveform after cut phase, through resistance
After RS31A, RS31B, RS31C and capacitor CS31 are filtered, the VIN pin detection of input brightness adjustment control chip U31, and by controlling
The output of SNB pin is charged, and extended by RS52B to QS51 after resistance RS52A and rectifier diode DS51 rectification to CS51
Driving time, then active bleed-off circuit is formed by resistance RS51A, RS51B, RS51C, RS51D and triode QS51, to silicon-controlled
It keeps maintaining electric current.
Rectifier diode DS51 can play the role of preventing brightness adjustment control chip SNB pin when being low level, anti-back suction.
It should be understood that the present embodiment is merely to illustrate the utility model rather than limitation the scope of the utility model.Furthermore
It should be understood that after reading the content taught by the present invention, those skilled in the art can make the utility model various
Change or modification, these equivalent forms also fall within the scope of the appended claims of the present application.
Claims (5)
1. a kind of for solving the circuit of light modulation minimum angles stroboscopic, characterized in that including brightness adjustment control chip U31, resistance
RS52A, rectifier diode DS51, resistance RS52B, capacitor CS51, resistance RS51A and triode QS51；The one end resistance RS52A with
The SNB pin of brightness adjustment control chip is electrically connected, and the resistance RS52A other end is electrically connected with rectifier diode DS51 anode, rectification two
Pole pipe DS51 cathode is electrically connected with capacitor CS51 and resistance RS52B respectively, and resistance RS52B and the base stage of triode QS51 are electrically connected
It connects, resistance RS52A is electrically connected with the collector of triode QS51.
2. according to claim 1 for solving the circuit of light modulation minimum angles stroboscopic, characterized in that triode QS51's
Emitter is electrically connected with capacitor CS51.
3. according to claim 1 for solving the circuit of light modulation minimum angles stroboscopic, characterized in that be additionally provided with RC filtering
Circuit, RC filter circuit include resistance RS31A, resistance RS31B, resistance RS31C and capacitor CS31, resistance RS31A and resistance
The electrical connection of the one end RS31B, the resistance RS31B other end is electrically connected with the one end resistance RS31C, the resistance RS31C other end respectively with electricity
Hold the VIN pin electrical connection of CS31 and brightness adjustment control chip U31.
4. according to claim 1 for solving the circuit of light modulation minimum angles stroboscopic, characterized in that it is whole to be additionally provided with full-bridge
Current circuit, full bridge rectifier include rectifier diode DS11, two poles rectifier diode DS12, rectifier diode DS13 and rectification
The anode of pipe DS14, rectifier diode DS11 are electrically connected with the cathode of rectifier diode DS13, the anode of rectifier diode DS12
It is electrically connected with the cathode of rectifier diode DS14, the cathode of the rectifier diode DS11 cathode with rectifier diode DS11 respectively
It is electrically connected with RC filter circuit, the anode of rectifier diode DS13 is electric with the anode of rectifier diode DS14 and capacitor CS51 respectively
Connection.
5. according to claim 1 or 2 or 3 or 4 for solving the circuit of light modulation minimum angles stroboscopic, characterized in that electricity
Resistance RS51B, resistance RS51C and resistance RS51D, resistance RS51A, resistance are additionally provided between resistance RS51A and triode QS51
RS51B, resistance RS51C and resistance RS51D are sequentially connected in series, and the collector of triode QS51 is electrically connected with resistance RS51D.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821965312.6U CN209497640U (en) | 2018-11-27 | 2018-11-27 | For solving the circuit of light modulation minimum angles stroboscopic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821965312.6U CN209497640U (en) | 2018-11-27 | 2018-11-27 | For solving the circuit of light modulation minimum angles stroboscopic |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209497640U true CN209497640U (en) | 2019-10-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821965312.6U Expired - Fee Related CN209497640U (en) | 2018-11-27 | 2018-11-27 | For solving the circuit of light modulation minimum angles stroboscopic |
Country Status (1)
| Country | Link |
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| CN (1) | CN209497640U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111385934A (en) * | 2019-12-26 | 2020-07-07 | 宁波凯耀电器制造有限公司 | Silicon controlled rectifier Bleeder circuit of adjusting luminance |
-
2018
- 2018-11-27 CN CN201821965312.6U patent/CN209497640U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111385934A (en) * | 2019-12-26 | 2020-07-07 | 宁波凯耀电器制造有限公司 | Silicon controlled rectifier Bleeder circuit of adjusting luminance |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191015 Termination date: 20211127 |
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| CF01 | Termination of patent right due to non-payment of annual fee |