CN102288794A - Electronic load for testing LED (light-emitting diode) driver - Google Patents
Electronic load for testing LED (light-emitting diode) driver Download PDFInfo
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- CN102288794A CN102288794A CN2011101223319A CN201110122331A CN102288794A CN 102288794 A CN102288794 A CN 102288794A CN 2011101223319 A CN2011101223319 A CN 2011101223319A CN 201110122331 A CN201110122331 A CN 201110122331A CN 102288794 A CN102288794 A CN 102288794A
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Abstract
The invention relates to an electronic load for testing an LED (light-emitting diode) driver, belonging to the lighting field. The electronic load comprises a power supply circuit, a constant-resistance load circuit and a constant-voltage load circuit. The power supply circuit is used for supplying power to the whole system, the constant-resistance load circuit is mainly used for simulating the linear load characteristic part after LED conduction, the constant-voltage load circuit is mainly used for simulating constant-voltage load characteristics prior to LED conduction, and a load with serial and parallel combination of different LEDs can be simulated through combination of the two parts. The whole circuit is powered up by the power supply circuit, and the constant-resistance load and the constant-voltage load can be adjusted to reach the required constant value to simulate the characteristics of the LED load.
Description
Technical field
The present invention relates to lighting field, at length say it is the electronic load that a kind of led light source connection in series-parallel characteristic of simulating various combination detects led driver.
Background technology
As everyone knows, LED illumination is the lighting system of future ideality, but the restraining factors that limit its popularization at present are quality of led driver.Because the load characteristic of LED itself is non-linear, traditional led driver all is to detect quality own by directly connecting led light source, and efficient is low, the cost height, very easily damage the led light source of test usefulness, and present electronic load can't provide the load of LED characteristic.
Summary of the invention
In order to overcome the deficiencies in the prior art, the invention provides a kind of electronic load of simulating the led light source connection in series-parallel characteristic of various combination, power circuit provides the power supply of entire circuit, by regulating constant-resistance load and constant voltage load, makes them reach the characteristic that desired steady state value is simulated the LED load.
The technical solution adopted for the present invention to solve the technical problems is: a kind of electronic load that detects led driver, it is characterized in that constituting by power circuit, constant-resistance load circuit, constant voltage load circuit, power circuit is made of capacitor C 7, C8, one pin of capacitor C 7 links to each other with a pin of capacitor C 8, another pin of capacitor C 7 links to each other with power supply ground, and another pin of capacitor C 8 links to each other with power supply ground; The constant-resistance load circuit is by field effect transistor Q2, adjustable resistance W1, operational amplifier IC2, resistance R 1, R4, R11, R13, capacitor C 2, C3, C6 constitutes, one pin of resistance R 1 links to each other with the grid of field effect transistor Q2, another pin of resistance R 1 and capacitor C 3, the common port of the pin of C6 links to each other with the 7th pin of operational amplifier IC2, another pin of capacitor C 3 links to each other with a pin of resistance R 13, another pin of capacitor C 6 and another pin of resistance R 13, one pin common port of resistance R 11 links to each other with the 6th pin of operational amplifier IC2, one pin common port of another pin of resistance R 11 and resistance R 4 links to each other with the source electrode of field effect transistor Q2, and another pin of resistance R 4 links to each other with the drain electrode of field effect transistor Q1; The 1st pin of adjustable resistance W1 links to each other with the drain electrode of field effect transistor Q2, and the 2nd pin of adjustable resistance W1 links to each other with a pin of capacitor C 2, and the 3rd pin of adjustable resistance W1 links to each other with the 5th pin of operational amplifier IC2 with the common port of another pin of capacitor C 2; The constant voltage load circuit is made of field effect transistor Q1, adjustable resistance W2, operational amplifier IC2, reference source IC1, resistance R 8, R12, R14, R15, R16, R17, capacitor C 5, C9, C11, one pin of resistance R 8 links to each other with power input, and a pin common port of another pin of resistance R 8 and capacitor C 5 links to each other with the 1st, 3 pin of reference source IC1, the 1st pin of adjustable resistance W2; Another pin of capacitor C 5 links to each other with power supply ground; The 2nd pin common port of the 2nd pin of adjustable resistance and reference source IC1 links to each other with power supply ground; One pin common port of one pin resistance R 17 of the 3rd pin of adjustable resistance W2 and capacitor C 9 links to each other with the 3rd pin of operational amplifier IC2; Another pin of capacitor C 9 and a pin of capacitor C 11, one pin common port of resistance R 12 links to each other with the 1st pin of operational amplifier IC2, another pin of resistance R 17 links to each other with another pin of capacitor C 11, one pin common port of another pin of resistance R 12 and resistance R 15 links to each other with the grid of field effect transistor Q1, one pin common port of one pin of resistance R 14 and resistance R 16 links to each other with the 3rd pin of operational amplifier IC2, another pin common port of another pin of resistance R 14 and resistance R 15 links to each other with power supply ground, another pin of resistance R 16 links to each other with the drain electrode of field effect transistor Q1, and the source electrode of field effect transistor links to each other with power supply ground.
The invention has the beneficial effects as follows that power circuit provides the power supply of entire circuit,, make them reach the characteristic that desired steady state value is simulated the LED load by regulating constant-resistance load and constant voltage load.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is circuit theory diagrams of the present invention.
Embodiment
Among Fig. 1, the present invention is made of power circuit, constant-resistance load circuit, constant voltage load circuit.Power circuit is powered to total system, and the constant-resistance load circuit shows as linear load characteristic part after mainly simulating the LED conducting, and the constant voltage load shows as the constant voltage load characteristic before mainly simulating the LED conducting.By two parts combination, can simulate the load of the various connection in series-parallel combinations of LED of varying number.Power circuit is made of capacitor C 7, C8, and a pin of capacitor C 7 links to each other with a pin of capacitor C 8, and another pin of capacitor C 7 links to each other with power supply ground, and another pin of capacitor C 8 links to each other with power supply ground; The constant-resistance load circuit is by field effect transistor Q2, adjustable resistance W1, operational amplifier IC2, resistance R 1, R4, R11, R13, capacitor C 2, C3, C6 constitutes, one pin of resistance R 1 links to each other with the grid of field effect transistor Q2, another pin of resistance R 1 and capacitor C 3, the common port of the pin of C6 links to each other with the 7th pin of operational amplifier IC2, another pin of capacitor C 3 links to each other with a pin of resistance R 13, another pin of capacitor C 6 and another pin of resistance R 13, one pin common port of resistance R 11 links to each other with the 6th pin of operational amplifier IC2, one pin common port of another pin of resistance R 11 and resistance R 4 links to each other with the source electrode of field effect transistor Q2, and another pin of resistance R 4 links to each other with the drain electrode of field effect transistor Q1; The 1st pin of adjustable resistance W1 links to each other with the drain electrode of field effect transistor Q2, and the 2nd pin of adjustable resistance W1 links to each other with a pin of capacitor C 2, and the 3rd pin of adjustable resistance W1 links to each other with the 5th pin of operational amplifier IC2 with the common port of another pin of capacitor C 2; The constant voltage load circuit is made of field effect transistor Q1, adjustable resistance W2, operational amplifier IC2, reference source IC1, resistance R 8, R12, R14, R15, R16, R17, capacitor C 5, C9, C11, one pin of resistance R 8 links to each other with power input, and a pin common port of another pin of resistance R 8 and capacitor C 5 links to each other with the 1st, 3 pin of reference source IC1, the 1st pin of adjustable resistance W2; Another pin of capacitor C 5 links to each other with power supply ground; The 2nd pin common port of the 2nd pin of adjustable resistance and reference source IC1 links to each other with power supply ground; One pin common port of one pin resistance R 17 of the 3rd pin of adjustable resistance W2 and capacitor C 9 links to each other with the 3rd pin of operational amplifier IC2; Another pin of capacitor C 9 and a pin of capacitor C 11, one pin common port of resistance R 12 links to each other with the 1st pin of operational amplifier IC2, another pin of resistance R 17 links to each other with another pin of capacitor C 11, one pin common port of another pin of resistance R 12 and resistance R 15 links to each other with the grid of field effect transistor Q1, one pin common port of one pin of resistance R 14 and resistance R 16 links to each other with the 3rd pin of operational amplifier IC2, another pin common port of another pin of resistance R 14 and resistance R 15 links to each other with power supply ground, another pin of resistance R 16 links to each other with the drain electrode of field effect transistor Q1, and the source electrode of field effect transistor links to each other with power supply ground.
Claims (1)
1. electronic load that detects led driver, it is characterized in that: constitute by power circuit, constant-resistance load circuit, constant voltage load circuit, power circuit is made of capacitor C 7, C8, one pin of capacitor C 7 links to each other with a pin of capacitor C 8, another pin of capacitor C 7 links to each other with power supply ground, and another pin of capacitor C 8 links to each other with power supply ground; The constant-resistance load circuit is by field effect transistor Q2, adjustable resistance W1, operational amplifier IC2, resistance R 1, R4, R11, R13, capacitor C 2, C3, C6 constitutes, one pin of resistance R 1 links to each other with the grid of field effect transistor Q2, another pin of resistance R 1 and capacitor C 3, the common port of the pin of C6 links to each other with the 7th pin of operational amplifier IC2, another pin of capacitor C 3 links to each other with a pin of resistance R 13, another pin of capacitor C 6 and another pin of resistance R 13, one pin common port of resistance R 11 links to each other with the 6th pin of operational amplifier IC2, one pin common port of another pin of resistance R 11 and resistance R 4 links to each other with the source electrode of field effect transistor Q2, and another pin of resistance R 4 links to each other with the drain electrode of field effect transistor Q1; The 1st pin of adjustable resistance W1 links to each other with the drain electrode of field effect transistor Q2, and the 2nd pin of adjustable resistance W1 links to each other with a pin of capacitor C 2, and the 3rd pin of adjustable resistance W1 links to each other with the 5th pin of operational amplifier IC2 with the common port of another pin of capacitor C 2; The constant voltage load circuit is made of field effect transistor Q1, adjustable resistance W2, operational amplifier IC2, reference source IC1, resistance R 8, R12, R14, R15, R16, R17, capacitor C 5, C9, C11, one pin of resistance R 8 links to each other with power input, and a pin common port of another pin of resistance R 8 and capacitor C 5 links to each other with the 1st, 3 pin of reference source IC1, the 1st pin of adjustable resistance W2; Another pin of capacitor C 5 links to each other with power supply ground; The 2nd pin common port of the 2nd pin of adjustable resistance and reference source IC1 links to each other with power supply ground; One pin common port of one pin resistance R 17 of the 3rd pin of adjustable resistance W2 and capacitor C 9 links to each other with the 3rd pin of operational amplifier IC2; Another pin of capacitor C 9 and a pin of capacitor C 11, one pin common port of resistance R 12 links to each other with the 1st pin of operational amplifier IC2, another pin of resistance R 17 links to each other with another pin of capacitor C 11, one pin common port of another pin of resistance R 12 and resistance R 15 links to each other with the grid of field effect transistor Q1, one pin common port of one pin of resistance R 14 and resistance R 16 links to each other with the 3rd pin of operational amplifier IC2, another pin common port of another pin of resistance R 14 and resistance R 15 links to each other with power supply ground, another pin of resistance R 16 links to each other with the drain electrode of field effect transistor Q1, and the source electrode of field effect transistor links to each other with power supply ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101223319A CN102288794A (en) | 2011-05-12 | 2011-05-12 | Electronic load for testing LED (light-emitting diode) driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101223319A CN102288794A (en) | 2011-05-12 | 2011-05-12 | Electronic load for testing LED (light-emitting diode) driver |
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| Publication Number | Publication Date |
|---|---|
| CN102288794A true CN102288794A (en) | 2011-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101223319A Pending CN102288794A (en) | 2011-05-12 | 2011-05-12 | Electronic load for testing LED (light-emitting diode) driver |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102768333A (en) * | 2012-07-02 | 2012-11-07 | 深圳Tcl新技术有限公司 | Performance detection circuit for LED drive circuit |
| CN106604463A (en) * | 2016-12-14 | 2017-04-26 | 深圳Tcl数字技术有限公司 | LED simulating device |
-
2011
- 2011-05-12 CN CN2011101223319A patent/CN102288794A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102768333A (en) * | 2012-07-02 | 2012-11-07 | 深圳Tcl新技术有限公司 | Performance detection circuit for LED drive circuit |
| CN102768333B (en) * | 2012-07-02 | 2015-07-01 | 深圳Tcl新技术有限公司 | Performance detection circuit for LED drive circuit |
| CN106604463A (en) * | 2016-12-14 | 2017-04-26 | 深圳Tcl数字技术有限公司 | LED simulating device |
| CN106604463B (en) * | 2016-12-14 | 2019-05-31 | 深圳Tcl数字技术有限公司 | LED simulator |
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Application publication date: 20111221 |