CN206114874U - General -purpose diode simulation load circuit of emitting diode LED driver - Google Patents
General -purpose diode simulation load circuit of emitting diode LED driver Download PDFInfo
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- CN206114874U CN206114874U CN201621006389.1U CN201621006389U CN206114874U CN 206114874 U CN206114874 U CN 206114874U CN 201621006389 U CN201621006389 U CN 201621006389U CN 206114874 U CN206114874 U CN 206114874U
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Abstract
The utility model discloses a general -purpose diode simulation load circuit of emitting diode LED driver, break through current -limiting resistor including LED driver, diode artificial load subassembly and threshold value, diode artificial load subassembly and threshold value break through and are connected to after current -limiting resistor establishes ties the both ends of LED driver. The utility model discloses can reach LED work emulation mode, satisfy LED and take the technology demand that the load simulation is ageing.
Description
Technical field
This utility model is related to field of LED drive, and in particular to a kind of general-purpose diode of LED driver
Analogue load circuit.
Background technology
LED light source is the energy-saving light source of current popularization and application, and its luminous body needs constant current-supplying, need to be by by various power supplys
It is ultimately converted to be adapted to the luminous driving power supply (driver) of LED operation needs.For necessary work in driver production process
Skill-product electrified ageing, it is desirable to have the aging platform of suitable simulation LED operation state, screens for aging and defective products.
At present the band of LED driver carries that simulator is aging, generally using the electronic load with duty cycle adjustment, with accounting for
The change of empty ratio, needs to reach specified driver output effective current and power, will cause peak value by with dutycycle factor
Pulse current and power, i.e., can not really simulate the actual working state of LED, and cause impulse impairments to driver, to setting
The limited driver of meter electric current, power headroom will bring injury.As shown in figure 1, describing 700mA dutycycle Electronic Negative carrier waves
Shape, its peak-to-peak value are an impulse wave up to 2.44A, waveform, will cause a certain degree of injury to driver.
The content of the invention
Goal of the invention of the present utility model is to provide a kind of general-purpose diode fictitious load of LED driver
Circuit, can reach LED operation emulation mode, meet LED bringing onto loads and simulate aging process requirements.
To achieve the above object of the invention, the technical solution adopted in the utility model is：A kind of LED driver
General-purpose diode analogue load circuit, including LED driver, diode simulation load component and threshold value break through current-limiting resistance,
The diode simulation load component and threshold value are connected to the two ends of the LED driver after breaking through current-limiting resistance series connection.
Further, the diode simulation load component includes the diode that several positive poles are sequentially connected in series with negative pole
Unit, the diode include the diode that several positive poles are sequentially connected in series with negative pole.
Further, the diode simulation load component includes several diodes being connected in parallel, two pole
The positive pole of pipe unit is connected, and the negative pole of the diode is connected, the diode include several positive poles and negative pole according to
The secondary diode being connected in series.
As above-mentioned technical proposal is used, this utility model has following advantages compared with prior art：
Diode simulation load component of the present utility model and threshold value are connected to the LED after breaking through current-limiting resistance series connection and drive
The two ends of dynamic device, the threshold value are broken through current-limiting resistance and prevent LED driver output because breaking through diode load threshold energy
Overload protection, enables to simulate the working condition of LED bright lights, and having reached general-purpose diode simulation LED load carries out production band
Carry aging purpose.
Description of the drawings
Fig. 1 is 700mA dutycycle electronic load oscillograms in prior art.
Fig. 2 is circuit diagram of the present utility model in embodiment one.
Fig. 3 is diode structural representation of the present utility model in embodiment one.
Fig. 4 is diode simulation load component structural representation of the present utility model in embodiment one.
Fig. 5 is diode simulation load component structural representation of the present utility model in embodiment two.
Fig. 6 is the volt-ampere Vf performance plots of diode.
Fig. 7 is this utility model general-purpose diode fictitious load 700mA drive waveforms figures.
Specific embodiment
Below in conjunction with the accompanying drawings and embodiment is further described to this utility model：
Embodiment one：
Referring to shown in Fig. 2 to 4, a kind of general-purpose diode analogue load circuit of LED driver, including
LED driver, diode simulation load component and threshold value break through current-limiting resistance, and the diode simulation load component and threshold value are prominent
The two ends of the LED driver are connected to after broken current-limiting resistance series connection.
In the present embodiment, the diode simulation load component includes two poles that several positive poles are sequentially connected in series with negative pole
Pipe unit, the diode include the diode that several positive poles are sequentially connected in series with negative pole.
Embodiment two：
It is shown in Figure 5, a kind of general-purpose diode analogue load circuit of LED driver, including LED drives
Dynamic device, diode simulation load component and threshold value break through current-limiting resistance, and the diode simulation load component and threshold value break through limit
The two ends of the LED driver are connected to after leakage resistance series connection.
In the present embodiment, diode simulation load component includes several diodes being connected in parallel, described two
The positive pole of pole pipe unit is connected, and the negative pole of the diode is connected, and the diode includes several positive poles and negative pole
The diode being sequentially connected in series.
Shown in Figure 6, there is threshold value threshold voltage in diode, and below threshold voltage, diode is in positive but not
Conducting, is cut-off state, internal to stop the migration of carrier because potential wall builds (threshold voltage), makes diode forward " cut-off ".
It is therefore desirable to have one is broken through threshold voltage energy and turns on diode forward " puncturing ", forward current is formed.Due to several
Diode connection in series-parallel and the diode simulation load component that formed, when threshold value is broken through, the transient energy that formed is very big, holds
Easily make the overload protection function action inside LED driver and close driver output.To solve this threshold voltage problem, this
Utility model is simulated threshold value of connecting between load component in LED driver and diode and breaks through current-limiting resistance, is not reaching threshold value
During voltage, no electric current, threshold value break through no pressure drop on current-limiting resistance, negligible its presence；Once break through threshold voltage, moment
The threshold value that the dash current of formation makes breaks through current-limiting resistance and produces current limliting hypotensive effect, then LED driver is not up to overload protection, makes
Its normal work, has reached LED operation emulation mode, meets LED bringing onto loads and simulates aging technological requirement.
It is shown in Figure 7, describe 700mA general-purpose diode fictitious load waveforms, measured current is 673mA, ripple peak-
Peak point current is 274mA, is a flat straight line.
Claims (3)
1. the general-purpose diode analogue load circuit of a kind of LED driver, it is characterised in that：Drive including LED
Device, diode simulation load component and threshold value break through current-limiting resistance, and the diode simulation load component and threshold value break through current limliting
The two ends of the LED driver are connected to after resistant series.
2. the general-purpose diode analogue load circuit of LED driver according to claim 1, its feature exist
In：The diode simulation load component includes the diode that several positive poles are sequentially connected in series with negative pole, two pole
Pipe unit includes the diode that several positive poles are sequentially connected in series with negative pole.
3. the general-purpose diode analogue load circuit of LED driver according to claim 1, its feature exist
In：The diode simulation load component includes several diodes being connected in parallel, the positive pole phase of the diode
Even, the negative pole of the diode is connected, and the diode includes two that several positive poles are sequentially connected in series with negative pole
Pole pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621006389.1U CN206114874U (en) | 2016-08-31 | 2016-08-31 | General -purpose diode simulation load circuit of emitting diode LED driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621006389.1U CN206114874U (en) | 2016-08-31 | 2016-08-31 | General -purpose diode simulation load circuit of emitting diode LED driver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206114874U true CN206114874U (en) | 2017-04-19 |
Family
ID=58515337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621006389.1U Expired - Fee Related CN206114874U (en) | 2016-08-31 | 2016-08-31 | General -purpose diode simulation load circuit of emitting diode LED driver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206114874U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10897251B1 (en) | 2020-04-20 | 2021-01-19 | Infineon Technologies Austria Ag | Isolation barrier communication system in a package for isolated gate driver communication |
-
2016
- 2016-08-31 CN CN201621006389.1U patent/CN206114874U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10897251B1 (en) | 2020-04-20 | 2021-01-19 | Infineon Technologies Austria Ag | Isolation barrier communication system in a package for isolated gate driver communication |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170419 Termination date: 20200831 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |