CN204259253U - A kind of constant-current driving power supply - Google Patents
A kind of constant-current driving power supply Download PDFInfo
- Publication number
- CN204259253U CN204259253U CN201420812328.9U CN201420812328U CN204259253U CN 204259253 U CN204259253 U CN 204259253U CN 201420812328 U CN201420812328 U CN 201420812328U CN 204259253 U CN204259253 U CN 204259253U
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- Prior art keywords
- control chip
- diode
- pin
- connects
- electric capacity
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- Expired - Fee Related
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The utility model discloses a kind of constant-current driving power supply, comprising: control chip, the power input pin of control chip connects the negative electrode of the first diode, one end of the first electric capacity, the negative electrode of the second diode and one end of inductance respectively; The anode of the other end sending and receiving optical diode of inductance; One end of another termination second electric capacity of the first electric capacity, the other end ground connection of the second electric capacity; The anode of the first diode connects input voltage; The internal electric source pin of control chip connects the 3rd electric capacity; The linearity light adjusting pin of control chip and enable input pin respectively with internal electric source pin short circuit; The oscillation resistance connection pin of control chip connects one end of the second resistance; The current sample input pin of control chip connects one end of the first resistance; The gate lead of control chip connects the grid of field-effect transistor; The drain electrode of field-effect transistor connects the anode of the second diode and the negative electrode of light-emitting diode respectively; This product effectively controls useful life and the stability of light source.
Description
Technical field
The utility model relates to constant-current driving power supply field, particularly relates to a kind of constant-current driving power supply.
Background technology
Constant-current driving power supply is that power supply supply is converted to specific electric current and voltage with the electric pressure converter of driving LED luminescence.Under normal circumstances: the input of LED drive power comprises high pressure industrial frequency AC (i.e. civil power), low-voltage direct, high voltage direct current exchange with low-voltage high-frequency (output as electronic transformer) etc.Output then most of constant current source for can change voltage with the change of LED forward voltage drop value of LED drive power.
It is bad to there is energy-saving effect in existing constant-current driving power supply, and existing defects on thermal diffusivity, shorten the service life of product, add the use cost of user, the needs in practical application cannot be met.
Utility model content
The utility model provides a kind of constant-current driving power supply, and the utility model improves the useful life of power supply, and improves the thermal diffusivity of power supply, described below:
A kind of constant-current driving power supply, comprising: control chip, and the power input pin of described control chip connects the negative electrode of the first diode, one end of the first electric capacity, the negative electrode of the second diode and one end of inductance respectively; The anode of the other end sending and receiving optical diode of inductance; One end of another termination second electric capacity of the first electric capacity, the other end ground connection of the second electric capacity;
The anode of described first diode connects input voltage; The internal electric source pin of control chip connects the 3rd electric capacity; The linearity light adjusting pin of control chip and enable input pin respectively with internal electric source pin short circuit; The oscillation resistance connection pin of control chip connects one end of the second resistance; The current sample input pin of control chip connects one end of the first resistance; The gate lead of control chip connects the grid of field-effect transistor;
The drain electrode of field-effect transistor connects the anode of the second diode and the negative electrode of light-emitting diode respectively, and the source electrode of field-effect transistor connects one end of the first resistance;
The equal ground connection of grounding pin of the other end of the second resistance, the other end of the first resistance and control chip.
Described constant-current driving power supply outer setting has aluminum hull.
The beneficial effect of the technical scheme that the utility model provides is: this constant-current driving power supply adopts LED lamp special constant-current source to power, and effectively controls useful life and the stability of light source.Adopt raffinal shell, improve thermal diffusivity.This constant-current driving power supply, without stroboscopic, radiationless, meets the needs in practical application.During specific implementation, the power of power supply can be determined as required, such as: 1W, 3W etc.
Accompanying drawing explanation
Fig. 1 is a kind of circuit diagram of constant-current driving power supply.
In accompanying drawing, the list of parts representated by each label is as follows:
IC1: control chip; VIN: power input pin;
D1: the first diode; C1: the first electric capacity;
C2: the second electric capacity; D2: the second diode;
LED: light-emitting diode; VDD: internal electric source pin;
LD: linearity light adjusting pin; PWMD: enable input pin;
RT: oscillation resistance connects pin; CS: current sample input pin;
GATE: gate lead; Q1: field-effect transistor;
R1: the first resistance; L1: inductance;
R2: the second resistance; GND: grounding pin;
C2: the second electric capacity; C3: the three electric capacity.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearly, below the utility model execution mode is described in further detail.
A kind of constant-current driving power supply, comprising: control chip IC1, and the power input pin VIN of control chip IC1 connects the negative electrode of the first diode D1, one end of the first electric capacity C1, the negative electrode of the second diode D2 and one end of inductance L 1 respectively;
The other end of inductance L 1 connects the anode of LED; One end of another termination second electric capacity C2 of the first electric capacity C1, the other end ground connection of the second electric capacity C2;
The anode of the first diode D1 connects input voltage; The internal electric source pin VDD of control chip IC1 meets the 3rd electric capacity C3; The linearity light adjusting pin LD of control chip IC1 and enable input pin PWMD respectively with internal electric source pin VDD short circuit; The oscillation resistance connection pin RT of control chip IC1 connects one end of the second resistance R2; The current sample input pin CS of control chip IC1 connects one end of the first resistance R1; The gate lead GATE of control chip IC1 connects the grid of field-effect transistor Q1;
The drain electrode of field-effect transistor Q1 connects the anode of the second diode D2 and the negative electrode of LED respectively; The source electrode of field-effect transistor Q1 connects one end of the first resistance R1; The other end of the second electric capacity C2, the other end of the second resistance R2, the other end of the first resistance R1 and the equal ground connection of grounding pin GND of control chip IC1.
In order to improve the thermal diffusivity of constant-current driving power supply, this power supply outside is also provided with aluminum hull.
During practical application, this constant-current driving power supply is semi-outdoor application product, please don't be used in the place pouring rainwater and use.DC:12-100V please be use to carry out work power.Power supply and the metallic member likely contacted, must separate with high-temperature insulation medium (more than 85 DEG C), to guarantee use safety.
In sum, this constant-current driving power supply is applicable to the occasions such as market, showroom, showcase, cabinet, museum, can support the use with Down lamp, wall lamp, track lamp, auto lamp etc.
The utility model embodiment is to the model of each device except doing specified otherwise, and the model of other devices does not limit, as long as can complete the device of above-mentioned functions.
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, above-mentioned the utility model embodiment sequence number, just to describing, does not represent the quality of embodiment.
Above exemplary description is done to the utility model; should be noted that; when not departing from core of the present utility model, any simple distortion, amendment or other those skilled in the art can not spend the equivalent replacement of creative work all to fall into protection range of the present utility model.
Claims (2)
1. a constant-current driving power supply, comprising: control chip, it is characterized in that,
The power input pin of described control chip connects the negative electrode of the first diode, one end of the first electric capacity, the negative electrode of the second diode and one end of inductance respectively; The anode of the other end sending and receiving optical diode of inductance; One end of another termination second electric capacity of the first electric capacity, the other end ground connection of the second electric capacity;
The anode of described first diode connects input voltage; The internal electric source pin of control chip connects the 3rd electric capacity; The linearity light adjusting pin of control chip and enable input pin respectively with internal electric source pin short circuit; The oscillation resistance connection pin of control chip connects one end of the second resistance; The current sample input pin of control chip connects one end of the first resistance; The gate lead of control chip connects the grid of field-effect transistor;
The drain electrode of field-effect transistor connects the anode of the second diode and the negative electrode of light-emitting diode respectively, and the source electrode of field-effect transistor connects one end of the first resistance;
The equal ground connection of grounding pin of the other end of the second resistance, the other end of the first resistance and control chip.
2. a kind of constant-current driving power supply according to claim 1, is characterized in that, described constant-current driving power supply outer setting has aluminum hull.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420812328.9U CN204259253U (en) | 2014-12-18 | 2014-12-18 | A kind of constant-current driving power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420812328.9U CN204259253U (en) | 2014-12-18 | 2014-12-18 | A kind of constant-current driving power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204259253U true CN204259253U (en) | 2015-04-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420812328.9U Expired - Fee Related CN204259253U (en) | 2014-12-18 | 2014-12-18 | A kind of constant-current driving power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204259253U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107277985A (en) * | 2017-08-15 | 2017-10-20 | 合肥惠科金扬科技有限公司 | LED light adjusting circuits and LED display device |
-
2014
- 2014-12-18 CN CN201420812328.9U patent/CN204259253U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107277985A (en) * | 2017-08-15 | 2017-10-20 | 合肥惠科金扬科技有限公司 | LED light adjusting circuits and LED display device |
| CN107277985B (en) * | 2017-08-15 | 2023-10-24 | 合肥惠科金扬科技有限公司 | LED dimming circuit and LED display device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150408 Termination date: 20201218 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |