CN219372631U - PWM signal dimming control circuit compatible with active and passive types - Google Patents

PWM signal dimming control circuit compatible with active and passive types Download PDF

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Publication number
CN219372631U
CN219372631U CN202320719830.4U CN202320719830U CN219372631U CN 219372631 U CN219372631 U CN 219372631U CN 202320719830 U CN202320719830 U CN 202320719830U CN 219372631 U CN219372631 U CN 219372631U
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Prior art keywords
triode
resistor
electrode
active
dimming control
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CN202320719830.4U
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朱春强
叶飞
张统
姚伟民
吴航
陈泽杨
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Hengdian Group Tospo Lighting Co Ltd
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Hengdian Group Tospo Lighting Co Ltd
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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
    • Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

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Abstract

The utility model discloses a PWM signal dimming control circuit compatible with active and passive types, which belongs to the technical field of dimming control, and comprises an upper arm driving circuit and a lower arm driving circuit, wherein a base electrode of a triode Q1 is connected with one end of a resistor R1, the other end of the resistor R1 is connected with a control signal input end PWM1, a collector electrode of the triode Q1 is connected with one end of a resistor R3, and the other end of the resistor R3 is connected with a base electrode of a triode Q2; the base of triode Q3 is connected with one end of resistance R5, and resistance R5's the other end is connected with control signal input PWM2, and triode Q3's projecting pole is connected with triode Q4's base. The triode Q1 and the triode Q2 are combined to output upper arm driving current, the triode Q3 and the triode Q4 are combined to output lower arm driving pull current, and accordingly push-pull control compatible with active and passive PWM dimming signal output is achieved.

Description

PWM signal dimming control circuit compatible with active and passive types
Technical Field
The utility model belongs to the technical field of dimming control, and particularly relates to a PWM signal dimming control circuit compatible with active and passive types.
Background
Along with popularization of LED intelligent lighting application, the LED intelligent lighting system has important application to the dimming control technology of the existing LED lamp driving, the intelligent dimming control application of the lamp in the existing intelligent lighting control system is wide, the existing LED intelligent driving mostly supports PWM signal dimming control, a stable and reliable lamp cluster signal regulation and control mode is provided for large-scale lamp cluster dimming, and centralized dimming control of large-scale lamps in a regional range can be realized.
The PWM dimming signals of the LED driving power supply on the market are divided into an active mode and a passive mode, the conventional PWM dimming controller needs to be matched with the PWM dimming signal type of the LED driving power supply, and the problems of poor compatibility, non-ideal dimming effect and the like exist in practical application.
Disclosure of Invention
To solve the problems set forth in the background art. The utility model provides a PWM signal dimming control circuit compatible with active and passive types, which has the characteristic of being compatible with the PWM signal dimming control of the active and passive types.
In order to achieve the above purpose, the present utility model provides the following technical solutions: a PWM signal dimming control circuit compatible with active and passive types comprises an upper arm driving circuit and a lower arm driving circuit, wherein,
the upper arm driving circuit comprises a triode Q1 and a triode Q2, wherein the base electrode of the triode Q1 is connected with one end of a resistor R1, the other end of the resistor R1 is connected with a control signal input end PWM1, the emitting electrode of the triode Q1 is connected with a power supply ground, the collecting electrode of the triode Q1 is connected with one end of a resistor R3, the other end of the resistor R3 is connected with the base electrode of the triode Q2, and the emitting electrode of the triode Q2 is connected with the positive electrode of the power supply;
the lower arm driving circuit comprises a triode Q3 and a triode Q4, wherein the base electrode of the triode Q3 is connected with one end of a resistor R5, the other end of the resistor R5 is connected with a control signal input end PWM2, the emitting electrode of the triode Q3 is connected with the base electrode of the triode Q4, the emitting electrode of the triode Q4 is connected with the power ground, the collecting electrode of the triode Q2, the collecting electrode of the triode Q3 and the collecting electrode of the triode Q4 are all connected with the 1 pin of a connecting terminal P1, and the 2 pin of the connecting terminal P1 is connected with the power ground.
In order to bias the voltage bias of the triode Q1, a resistor R2 is further connected between the base of the triode Q1 and the emitter of the triode Q1.
In order to bias the voltage bias of the triode Q2, a resistor R4 is further connected between the base of the triode Q2 and the emitter of the triode Q2.
In order to bias the voltage bias of the triode Q3, a resistor R6 is further connected between the base of the triode Q3 and the emitter of the triode Q3.
In order to bias the voltage bias of the triode Q4, a resistor R7 is further connected between the base of the triode Q4 and the emitter of the triode Q4.
In order to realize the output of the upper arm driving current, further, the triode Q1 is of the S8050 type, and the triode Q2 is of the MJD45H11 type.
In order to form an NPN composite tube in a combined mode, the effects of large circuit driving and amplifying are achieved, and furthermore, the triode Q3 is of the S8050 type, and the triode Q4 is of the MJD45H11 type.
In order to provide a PWM dimming signal source capable of being controlled normally, further, the control signals output by the control signal input terminal PWM1 and the control signal input terminal PWM2 are a pair of complementary PWM signals.
Compared with the prior art, the utility model has the beneficial effects that:
1. the triode Q1 and the triode Q2 are combined to output upper arm driving current, the triode Q3 and the triode Q4 are combined to output lower arm driving pull current, and accordingly push-pull control compatible with active and passive PWM dimming signal output is achieved;
2. according to the utility model, the voltage of the triode Q1, the triode Q2, the triode Q3 and the triode Q4 is biased through the resistor R2, the resistor R4, the resistor R6 and the resistor R7 respectively, so that proper bias current is provided for each triode Q1, the triode Q2, the triode Q3 and the triode Q4, and the static working points of the triode Q1, the triode Q2, the triode Q3 and the triode Q4 are determined;
3. according to the utility model, the triode Q3 and the triode Q4 are combined to form an NPN type composite tube, so that the effects of large circuit driving and amplifying are achieved;
4. according to the utility model, the triode Q2 and the triode Q4 are high-power triodes, so that the carrying capacity of a signal bus is improved;
5. the lower arm driving circuit can effectively eliminate the influence of interelectrode capacitance of a dimming wire on long-distance cluster PWM dimming, and improves the dimming effect;
6. the utility model has the characteristics of flexible application, good reliability, strong driving capability, economy and practicability, and the circuit is simple and can ensure the stability and reliability of work.
Drawings
The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model. In the drawings:
FIG. 1 is a circuit diagram of the present utility model;
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Example 1
Referring to fig. 1, the present utility model provides the following technical solutions: a PWM signal dimming control circuit compatible with active and passive types comprises an upper arm driving circuit and a lower arm driving circuit, wherein,
the upper arm driving circuit comprises a triode Q1 and a triode Q2, wherein the base electrode of the triode Q1 is connected with one end of a resistor R1, the other end of the resistor R1 is connected with a control signal input end PWM1, the emitting electrode of the triode Q1 is connected with a power supply ground, the collecting electrode of the triode Q1 is connected with one end of a resistor R3, the other end of the resistor R3 is connected with the base electrode of the triode Q2, and the emitting electrode of the triode Q2 is connected with the positive electrode of the power supply;
the lower arm driving circuit comprises a triode Q3 and a triode Q4, wherein the base electrode of the triode Q3 is connected with one end of a resistor R5, the other end of the resistor R5 is connected with a control signal input end PWM2, the emitting electrode of the triode Q3 is connected with the base electrode of the triode Q4, the emitting electrode of the triode Q4 is connected with the power ground, the collecting electrode of the triode Q2, the collecting electrode of the triode Q3 and the collecting electrode of the triode Q4 are all connected with the 1 pin of a connecting terminal P1, and the 2 pin of the connecting terminal P1 is connected with the power ground.
By adopting the technical scheme, the triode Q1 and the triode Q2 are combined to realize the output of upper arm driving current, and the triode Q3 and the triode Q4 are combined to realize the output of lower arm driving pulling current, so that push-pull control compatible with active and passive PWM dimming signal output is realized.
Specifically, a resistor R2 is connected between the base of the triode Q1 and the emitter of the triode Q1.
By adopting the technical scheme, the voltage bias of the triode Q1 is biased.
Specifically, a resistor R4 is connected between the base of the transistor Q2 and the emitter of the transistor Q2.
By adopting the technical scheme, the voltage bias of the triode Q2 is biased.
Specifically, a resistor R6 is connected between the base of the transistor Q3 and the emitter of the transistor Q3.
By adopting the technical scheme, the voltage bias of the triode Q3 is biased.
Specifically, a resistor R7 is connected between the base of the transistor Q4 and the emitter of the transistor Q4.
By adopting the technical scheme, the voltage bias of the triode Q4 is biased.
Example 2
This embodiment differs from embodiment 1 in that: specifically, the transistor Q1 is of the S8050 type, and the transistor Q2 is of the MJD45H11 type.
By adopting the technical scheme, the triode Q1 realizes the on and off control function on the triode Q2; the triode Q1 and the triode Q2 are combined to realize the output of upper arm driving current.
Specifically, the transistor Q3 is of the S8050 type, and the transistor Q4 is of the MJD45H11 type.
By adopting the technical scheme, the triode Q3 and the triode Q4 are combined to form an NPN composite tube, so that the effects of large circuit driving and amplifying are achieved; the triode Q2 and the triode Q4 both adopt high-power triodes, and the carrying capacity of the signal bus is improved.
Example 3
This embodiment differs from embodiment 1 in that: specifically, the control signals output from the control signal input terminal PWM1 and the control signal input terminal PWM2 are a pair of complementary PWM signals.
By adopting the technical scheme, the PWM dimming signal source capable of being controlled normally is provided.
In summary, the transistor Q1 and the transistor Q2 of the present utility model combine to output the upper arm driving current, and the transistor Q3 and the transistor Q4 combine to output the lower arm driving pull current, so as to realize push-pull control compatible with active and passive PWM dimming signal output; according to the utility model, the voltage of the triode Q1, the triode Q2, the triode Q3 and the triode Q4 is biased through the resistor R2, the resistor R4, the resistor R6 and the resistor R7 respectively, so that proper bias current is provided for each triode Q1, the triode Q2, the triode Q3 and the triode Q4, and the static working points of the triode Q1, the triode Q2, the triode Q3 and the triode Q4 are determined; according to the utility model, the triode Q3 and the triode Q4 are combined to form an NPN type composite tube, so that the effects of large circuit driving and amplifying are achieved; according to the utility model, the triode Q2 and the triode Q4 are high-power triodes, so that the carrying capacity of a signal bus is improved; the lower arm driving circuit can effectively eliminate the influence of interelectrode capacitance of a dimming wire on long-distance cluster PWM dimming, and improves the dimming effect; the utility model has the characteristics of flexible application, good reliability, strong driving capability, economy and practicability, and the circuit is simple and can ensure the stability and reliability of work.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present utility model, and the present utility model is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present utility model has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (8)

1. A PWM signal dimming control circuit compatible with active and passive types is characterized in that: comprises an upper arm driving circuit and a lower arm driving circuit, wherein,
the upper arm driving circuit comprises a triode Q1 and a triode Q2, wherein the base electrode of the triode Q1 is connected with one end of a resistor R1, the other end of the resistor R1 is connected with a control signal input end PWM1, the emitting electrode of the triode Q1 is connected with a power supply ground, the collecting electrode of the triode Q1 is connected with one end of a resistor R3, the other end of the resistor R3 is connected with the base electrode of the triode Q2, and the emitting electrode of the triode Q2 is connected with the positive electrode of the power supply;
the lower arm driving circuit comprises a triode Q3 and a triode Q4, wherein the base electrode of the triode Q3 is connected with one end of a resistor R5, the other end of the resistor R5 is connected with a control signal input end PWM2, the emitting electrode of the triode Q3 is connected with the base electrode of the triode Q4, the emitting electrode of the triode Q4 is connected with the power ground, the collecting electrode of the triode Q2, the collecting electrode of the triode Q3 and the collecting electrode of the triode Q4 are all connected with the 1 pin of a connecting terminal P1, and the 2 pin of the connecting terminal P1 is connected with the power ground.
2. A PWM signal dimming control circuit compatible with both active and passive types as claimed in claim 1, wherein: a resistor R2 is connected between the base electrode of the triode Q1 and the emitter electrode of the triode Q1.
3. A PWM signal dimming control circuit compatible with both active and passive types as claimed in claim 1, wherein: a resistor R4 is connected between the base electrode of the triode Q2 and the emitter electrode of the triode Q2.
4. A PWM signal dimming control circuit compatible with both active and passive types as claimed in claim 1, wherein: a resistor R6 is connected between the base electrode of the triode Q3 and the emitter electrode of the triode Q3.
5. A PWM signal dimming control circuit compatible with both active and passive types as claimed in claim 1, wherein: a resistor R7 is connected between the base electrode of the triode Q4 and the emitter electrode of the triode Q4.
6. A PWM signal dimming control circuit compatible with both active and passive types as claimed in claim 1, wherein: the triode Q1 is of the S8050 type, and the triode Q2 is of the MJD45H11 type.
7. A PWM signal dimming control circuit compatible with both active and passive types as claimed in claim 1, wherein: the triode Q3 is of the S8050 type, and the triode Q4 is of the MJD45H11 type.
8. A PWM signal dimming control circuit compatible with both active and passive types as claimed in claim 1, wherein: the control signals output by the control signal input end PWM1 and the control signal input end PWM2 are a pair of complementary PWM signals.
CN202320719830.4U 2023-03-30 2023-03-30 PWM signal dimming control circuit compatible with active and passive types Active CN219372631U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202320719830.4U CN219372631U (en) 2023-03-30 2023-03-30 PWM signal dimming control circuit compatible with active and passive types

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202320719830.4U CN219372631U (en) 2023-03-30 2023-03-30 PWM signal dimming control circuit compatible with active and passive types

Publications (1)

Publication Number Publication Date
CN219372631U true CN219372631U (en) 2023-07-18

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Country Status (1)

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