CN212163787U - Constant voltage LED power control circuit - Google Patents
Constant voltage LED power control circuit Download PDFInfo
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- CN212163787U CN212163787U CN202021142297.2U CN202021142297U CN212163787U CN 212163787 U CN212163787 U CN 212163787U CN 202021142297 U CN202021142297 U CN 202021142297U CN 212163787 U CN212163787 U CN 212163787U
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Abstract
The utility model provides a constant voltage LED power control circuit, including triode Q3 and MOSFET, MOSFET's source and driving voltage VO-are connected, the drain electrode is connected with input signal VOUT-, grid and resistance R27, triode Q3's collecting electrode and resistance R26, resistance R27's the other end and driving voltage VO-, triode Q3's projecting pole and resistance R25 are connected, resistance R26 is connected with driving voltage VO +, resistance R25's the other end and triode Q3's base, resistance R24 are connected, this resistance R24's the other end and output signal VB are connected, the utility model discloses a control circuit adds constant voltage power supply can effectively reduce the volume of inductive controller, easy to assemble to can match various inductive controller control constant voltage LED lamp strip.
Description
Technical Field
The utility model relates to a be used for constant voltage LED power secondary output control field, more specifically say, especially relate to a constant voltage LED power control circuit.
Background
The LED lamp is used as a substitute light source of a traditional fluorescent lamp, has wide usability in the fields of commercial lighting and office lighting, brings great convenience to daily life and work of people, and has the great characteristic that commercial power cannot be used for direct power supply, so that the LED lamp needs to be provided with a corresponding power supply for driving as an illuminating lamp.
Generally, a constant-voltage LED power supply needs to be connected with an induction control electric appliance, an LED constant-voltage light bar is connected with a controller, the whole assembly process is inconvenient, and a constant-voltage LED power supply induction control module is large and inconvenient to install and cannot be matched with various induction controllers.
SUMMERY OF THE UTILITY MODEL
The utility model discloses improve prior art to above-mentioned shortcoming, control power output voltage through adding field effect transistor MOSFET at power secondary output, provide a constant voltage LED power control circuit, technical scheme as follows:
the utility model provides a constant voltage LED power control circuit, includes triode Q3 and MOSFET, MOSFET's source and driving voltage VO-are connected, and the drain electrode is connected with input signal VOUT-, and grid and resistance R27, triode Q3's collecting electrode and resistance R26, resistance R27's the other end and driving voltage VO-, triode Q3's projecting pole and resistance R25 are connected, resistance R26 is connected with driving voltage VO +, resistance R25's the other end and triode Q3's base, resistance R24 are connected, and this resistance R24's the other end is connected with output signal VB.
Resistors R24, R25, R26 and R27, a transistor Q3 and a MOSFET are added at the cathode of the power supply output, when the induction controller sends a signal to a VB end, the transistor Q3 pulls down the drive voltage of the MOSFET to open the cathode of the power supply.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model is used for constant voltage LED power supply secondary output control adds the volume that constant voltage power supply can effectively reduce induction controller through control circuit, easy to assemble to can match various induction controller control constant voltage LED lamp strip.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described as follows:
fig. 1 is a schematic diagram of the circuit structure of the present invention;
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiment of the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Embodiments of the present invention will be described in further detail below with reference to the following drawings, in which:
the utility model provides a constant voltage LED power control circuit which characterized in that: the power supply comprises a triode Q3 and a MOSFET, wherein the source electrode of the MOSFET is connected with a driving voltage VO-, the drain electrode of the MOSFET is connected with an input signal VOUT-, the grid electrode of the MOSFET is connected with a resistor R27, the collector electrode of the triode Q3 and a resistor R26, the other end of the resistor R27 is connected with the driving voltage VO-, the emitter electrode of the triode Q3 and a resistor R25, the resistor R26 is connected with the driving voltage VO +, the other end of the resistor R25 is connected with the base electrode of the triode Q3 and the resistor R24, and the other end of the resistor R24 is connected with an output signal VB.
Taking the working principle combined with the above structure as an example, the resistors R24, R25, R26 and R27, the transistor Q3 and the MOSFET are added to the negative electrode of the power supply output, and when the induction controller sends a signal to the VB terminal, the transistor Q3 pulls down the driving voltage of the MOSFET, so that the negative electrode of the power supply is opened.
The utility model is used for constant voltage LED power supply secondary output control adds the volume that constant voltage power supply can effectively reduce induction controller through control circuit, easy to assemble to can match various induction controller control constant voltage LED lamp strip.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (1)
1. The utility model provides a constant voltage LED power control circuit which characterized in that: the power supply comprises a triode Q3 and a MOSFET, wherein the source electrode of the MOSFET is connected with a driving voltage VO-, the drain electrode of the MOSFET is connected with an input signal VOUT-, the grid electrode of the MOSFET is connected with a resistor R27, the collector electrode of the triode Q3 and a resistor R26, the other end of the resistor R27 is connected with the driving voltage VO-, the emitter electrode of the triode Q3 and a resistor R25, the resistor R26 is connected with the driving voltage VO +, the other end of the resistor R25 is connected with the base electrode of the triode Q3 and the resistor R24, and the other end of the resistor R24 is connected with an output signal VB.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021142297.2U CN212163787U (en) | 2020-06-18 | 2020-06-18 | Constant voltage LED power control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021142297.2U CN212163787U (en) | 2020-06-18 | 2020-06-18 | Constant voltage LED power control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212163787U true CN212163787U (en) | 2020-12-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021142297.2U Active CN212163787U (en) | 2020-06-18 | 2020-06-18 | Constant voltage LED power control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212163787U (en) |
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2020
- 2020-06-18 CN CN202021142297.2U patent/CN212163787U/en active Active
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