CN208956356U - A kind of stage lighting dimmer switch power circuit - Google Patents
A kind of stage lighting dimmer switch power circuit Download PDFInfo
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- CN208956356U CN208956356U CN201821021570.9U CN201821021570U CN208956356U CN 208956356 U CN208956356 U CN 208956356U CN 201821021570 U CN201821021570 U CN 201821021570U CN 208956356 U CN208956356 U CN 208956356U
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Abstract
The utility model discloses a kind of stage lighting dimmer switch power circuits, the power circuit includes high frequency switch power output circuit, sequentially connected principal voltage circuit, first current rectifying and wave filtering circuit, power supply exports feed circuit and high frequency switch power primary master control circuit, sequentially connected secondary voltage circuit, second current rectifying and wave filtering circuit and VCC power supply, the principal voltage circuit and secondary voltage are connect with the high frequency switch power output circuit, the power circuit further includes the control unit connecting with stage lighting, the control unit includes reference circuit, first comparator circuit, second comparator circuit, circuit occurs for sequentially connected pwm signal, PWM drive circuit and metal-oxide-semiconductor switching circuit, the metal-oxide-semiconductor switching circuit is connect with stage lighting.The utility model have many advantages, such as the operation is stable performance is good, adjustable extent is wide, it is at low cost, have a wide range of application.
Description
Technical field
The utility model relates to a kind of power circuit more particularly to a kind of stage lighting dimmer switch power circuits.
Background technique
Switching Power Supply is widely used in being leading various with electronic computer with small-sized, light weight and efficient feature
The almost all of electronic equipment such as terminal device, communication equipment is current electronics and information industry rapid development indispensable one
Kind power mode.It is related to the Switching Power Supply of stage lighting PWM light modulation in the market, is requiring the slightly higher occasion can not normal use.
Currently, designing Switching Power Supply, not only circuit complexity, heavy workload, at high cost, low efficiency, Er Qieyin according to existing conventional method
Variable when design is more, it is difficult to accurate estimation, so that design result differs greatly with actual conditions, it is also necessary to correct repeatedly.Cause
This, it is necessary to provide that a kind of the operation is stable performance is good, can well solve the switching power circuit of dimming problem.
Utility model content
The stage lighting dimmer switch that the purpose of this utility model is to provide a kind of the operation is stable performances is good, adjustable extent is wide
Power circuit.
The utility model is achieved through the following technical solutions: a kind of stage lighting dimmer switch power circuit, the electricity
Source circuit includes high frequency switch power output circuit, sequentially connected principal voltage circuit, the first current rectifying and wave filtering circuit, power supply output
Feed circuit and high frequency switch power primary master control circuit, sequentially connected secondary voltage circuit, the second current rectifying and wave filtering circuit with
And VCC power supply, the principal voltage circuit and secondary voltage are connect with the high frequency switch power output circuit, the power circuit
It further include the control unit being connect with stage lighting, which includes reference circuit, first comparator circuit, the second comparator
Circuit, PWM drive circuit and metal-oxide-semiconductor switching circuit, the metal-oxide-semiconductor switching circuit occur for circuit, sequentially connected pwm signal
It is connect with stage lighting, the reference circuit passes through first comparator circuit and the second comparator circuit respectively and the power supply exports
Feed circuit connection, the VCC power supply are also connect with second comparator circuit and PWM drive circuit respectively.
Preferably, the output end of the first comparator and the power supply output feed circuit between and described second
The diode and resistance of series connection are respectively connected between the output end of comparator and power supply output feed circuit, wherein two
The anode of pole pipe is connect with power supply output feed circuit.
Preferably, the metal-oxide-semiconductor switching circuit includes metal-oxide-semiconductor, and the grid of the metal-oxide-semiconductor passes through a resistance and the PWM
The drain electrode of driving circuit connection, the metal-oxide-semiconductor is connect by a resistance with the anode of the stage lighting, and the source electrode also passes through
One resistance is connect with the grid, and the source electrode of the metal-oxide-semiconductor is connect with the cathode of the stage lighting.
Preferably, model UC3842, TL494 of the main control chip of the high frequency switch power primary master control circuit or
L6599；Main control chip in the PWM drive circuit is UCC27314 or IR4427.
Stage lighting dimmer switch power circuit provided by the utility model, by power supply square wave digitisation, by adjusting PWM
Duty ratio come realize light modulation, have many advantages, such as the operation is stable performance is good, adjustable extent is wide, it is at low cost, have a wide range of application.
Detailed description of the invention
Fig. 1 is the circuit structure schematic block diagram of power circuit described in the utility model embodiment.
Fig. 2 is the specific electrical block diagram of power circuit described in the utility model embodiment.
Specific embodiment
For the ease of the understanding of those skilled in the art, below in conjunction with the drawings and specific embodiments to the utility model make into
One step detailed description.
As shown in Fig. 1, a kind of stage lighting dimmer switch power circuit, the power circuit include that high frequency switch power is defeated
Circuit out, sequentially connected principal voltage circuit, the first current rectifying and wave filtering circuit, power supply output feed circuit and high frequency switch power
Primary master control circuit, sequentially connected secondary voltage circuit, the second current rectifying and wave filtering circuit and VCC power supply, the principal voltage circuit
It is connect with the high frequency switch power output circuit with secondary voltage, the power circuit further includes the control connecting with stage lighting
Unit.In Fig. 1, in dotted line frame is control unit, and as shown in Fig. 1, described control unit includes reference circuit, the first ratio
Compared with device circuit, the second comparator circuit, circuit, PWM drive circuit and metal-oxide-semiconductor switch electricity occur for sequentially connected pwm signal
Road, the metal-oxide-semiconductor switching circuit are connect with stage lighting, and the reference circuit passes through first comparator circuit and second respectively and compares
Device circuit and the power supply output feed circuit are connect, the VCC power supply also respectively with second comparator circuit and PWM
Driving circuit connection.
As preferred embodiment, the specific circuit structure of power circuit is as shown in Fig. 2, wherein in fig 2
Circuit in dotted line frame is described control unit, and high frequency switch power primary master control circuit and pwm signal are omitted in Fig. 2
Circuit occurs.As shown in Fig. 2, the output end of the first comparator and the power supply output feed circuit between, Yi Jisuo
The diode and resistance that series connection is respectively connected between the output end of the second comparator and power supply output feed circuit are stated,
Wherein the anode of diode is connect with power supply output feed circuit；The metal-oxide-semiconductor switching circuit includes metal-oxide-semiconductor, the MOS
The grid of pipe is connect by a resistance with the PWM drive circuit, and the drain electrode of the metal-oxide-semiconductor passes through a resistance and the stage lighting
Anode connection, and the source electrode also passes through a resistance and connect with the grid, the source electrode of the metal-oxide-semiconductor and the stage lighting
Cathode connection.In addition, the other function circuit of the power circuit is as shown in Fig. 2, this will not be detailed here.In addition, described
Circuit occurs for pwm signal can be realized that this will not be detailed here by functional module existing in the prior art or device.
In a wherein preferred embodiment, the model of the main control chip of the high frequency switch power primary master control circuit
Preferably UC3842, TL494 or L6599, can master control according to practical selection, in the PWM drive circuit in practical application
Chip is preferably UCC27314 or IR4427.
Illustrate the working principle of desk lamp dimmer switch power circuit provided in this embodiment: first comparator electricity briefly below
Road is for realizing constant current function, and the second comparator circuit is for realizing pressure-keeping functions, and VCC power supply is for giving the second comparator electricity
Road and PWM drive circuit provide the working power of position, and circuit occurs for pwm signal for generating pwm signal, when pwm signal passes through
The amplification of PWM drive circuit to realize the light on and off of control stage lighting, and passes through to control the on-off of metal-oxide-semiconductor switching circuit
The duty ratio of pwm signal is controlled to realize the switch conductor time of the metal-oxide-semiconductor in control metal-oxide-semiconductor switching circuit, to realize dance
Desk lamp light modulation has the advantages that light modulation is convenient, and performance is stablized, and application is wide, and circuit structure is simple and at low cost.
Above-described embodiment is the preferable implementation of the utility model, is not the restriction to the utility model, not
Be detached from the utility model inventive concept under the premise of, it is any it is obvious replacement the protection scope of the utility model it
It is interior.
Claims (5)
1. a kind of stage lighting dimmer switch power circuit, it is characterised in that: the power circuit includes high frequency switch power output
Circuit, at the beginning of sequentially connected principal voltage circuit, the first current rectifying and wave filtering circuit, power supply export feed circuit and high frequency switch power
Grade governor circuit, sequentially connected secondary voltage circuit, the second current rectifying and wave filtering circuit and VCC power supply, the principal voltage circuit and
Secondary voltage is connect with the high frequency switch power output circuit, and the power circuit further includes the control list connecting with stage lighting
Member, the control unit include reference circuit, first comparator circuit, the second comparator circuit, sequentially connected pwm signal generation
Circuit, PWM drive circuit and metal-oxide-semiconductor switching circuit, the metal-oxide-semiconductor switching circuit are connect with stage lighting, the reference circuit
It exports feed circuit with the power supply by first comparator circuit and the second comparator circuit respectively to connect, the VCC power supply
Also it is connect respectively with second comparator circuit and PWM drive circuit.
2. power circuit according to claim 1, it is characterised in that: the output end of the first comparator and the power supply
It is respectively connected between output feed circuit and between the output end of second comparator and power supply output feed circuit
The diode and resistance of series connection, wherein the anode of diode is connect with power supply output feed circuit.
3. power circuit according to claim 2, it is characterised in that: the metal-oxide-semiconductor switching circuit includes metal-oxide-semiconductor, should
The grid of metal-oxide-semiconductor is connect by a resistance with the PWM drive circuit, and the drain electrode of the metal-oxide-semiconductor passes through a resistance and the dance
The anode connection of desk lamp, and the source electrode also passes through a resistance and connect with the grid, the source electrode of the metal-oxide-semiconductor and the stage
The cathode of lamp connects.
4. power circuit according to any one of claims 1 to 3, it is characterised in that: at the beginning of the high frequency switch power
Model UC3842, TL494 or L6599 of the main control chip of grade governor circuit.
5. power circuit according to claim 4, it is characterised in that: the main control chip in the PWM drive circuit is
UCC27314 or IR4427.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821021570.9U CN208956356U (en) | 2018-06-29 | 2018-06-29 | A kind of stage lighting dimmer switch power circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821021570.9U CN208956356U (en) | 2018-06-29 | 2018-06-29 | A kind of stage lighting dimmer switch power circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208956356U true CN208956356U (en) | 2019-06-07 |
Family
ID=66731604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821021570.9U Active CN208956356U (en) | 2018-06-29 | 2018-06-29 | A kind of stage lighting dimmer switch power circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208956356U (en) |
-
2018
- 2018-06-29 CN CN201821021570.9U patent/CN208956356U/en active Active
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