CN111818701A - Dimmable high-power LED driving power supply - Google Patents
Dimmable high-power LED driving power supply Download PDFInfo
- Publication number
- CN111818701A CN111818701A CN202010747825.5A CN202010747825A CN111818701A CN 111818701 A CN111818701 A CN 111818701A CN 202010747825 A CN202010747825 A CN 202010747825A CN 111818701 A CN111818701 A CN 111818701A
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- main circuit
- control unit
- unit
- power supply
- chb
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/345—Current stabilisation; Maintaining constant current
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/32—Pulse-control circuits
- H05B45/325—Pulse-width modulation [PWM]
Abstract
The invention discloses a dimmable high-power LED driving power supply which comprises an input circuit, a main circuit, a control circuit, an optical coupling isolation unit, a Hall current sensor CHB, a single-period control unit, a main circuit flyback conversion unit, a constant current source control unit and a PWM dimming unit. The invention can enhance the anti-interference capability of the driving power supply, and has high output stability, high output precision and high electric energy utilization rate.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of LED lamp power supplies, in particular to the technical field of a dimmable high-power LED driving power supply.
[ background of the invention ]
The conventional high-power LED is mainly supplied with alternating current, and constant voltage and current are obtained through a converter to supply power to the high-power LED, however, the mode has relatively low power factor and can not effectively inhibit disturbance brought by an input end; the dimming is mainly realized by changing the current flowing through the high-power LED, and under the condition of different currents, the luminous wavelength is different, so that the luminous efficiency is influenced, and therefore, the circuits have the defects of weak anti-interference capability, poor output stability, low output precision, low power factor and the like.
[ summary of the invention ]
The invention aims to solve the problems in the prior art, and provides a dimmable high-power LED driving power supply which can enhance the anti-interference capability, the output stability, the output precision and the electric energy utilization rate of the driving power supply.
In order to achieve the purpose, the invention provides a dimmable high-power LED driving power supply, which comprises an input circuit, a main circuit, a control circuit, an optical coupling isolation unit, a Hall current sensor CHB, a single-period control unit, a main circuit flyback conversion unit, a constant current source control unit and a PWM dimming unit, wherein the main circuit and the control circuit are connected in parallel on the input circuit, the main circuit flyback conversion unit is arranged on the main circuit and is connected with the single-period control unit, the optical coupling isolation unit is arranged on the main circuit, the optical coupling isolation unit and the single-period control unit are arranged on the main circuit, the Hall current sensor CHB is arranged on the main circuit and is connected with the single-period control unit, the constant current source control unit is arranged on the control circuit and is connected with the single-period control unit, and a PWM dimming unit is connected between the constant current source control unit and the main circuit flyback conversion unit.
Preferably, the constant current source control unit adopts an Anti-window controller, and applies a conditional action technology Anti-window algorithm.
Preferably, the Hall current sensor CHB can be selected from models CHB-25NP and CHB-SP 5.
Preferably, the output end of the constant current source control unit is provided with an output switch tube, and the output switch tube is connected with the single-period control unit.
Preferably, the optical coupling isolation unit is arranged at the front side of the main circuit flyback conversion unit, and the optical coupling isolation unit is not in direct contact with the main circuit.
Preferably, the hall current sensor CHB is disposed at a front side of the main circuit flyback conversion unit, and the hall current sensor CHB is not in direct contact with the main circuit.
Preferably, the number of the optical coupling isolation units and the hall current sensors CHB is at least two.
The invention has the beneficial effects that: the input circuit, the main circuit, the control circuit, the optical coupling isolation unit, the Hall current sensor CHB, the single-period control unit, the main circuit flyback conversion unit, the constant current source control unit and the PWM dimming unit are combined together, through experimental optimization, the single-period control output voltage is adopted, the voltage precision can be controlled within 1%, under the condition that the input end voltage is disturbed, the output voltage can be equal to a voltage reference value in a switching period, the influence caused by disturbance of the input voltage is effectively inhibited, meanwhile, a subsequent circuit is regarded as a pure resistor in the single-period control process, the power factor of the whole circuit is improved, the output voltage is input into the single-period control unit through the optical coupling isolation unit after being sampled, and the main circuit is effectively isolated from the control circuit. The Hall current sensor CHB is adopted for output current detection, the model of CHB-25NP/SP5 can be selected, the detection precision is improved, the detection error caused by the fact that resistance changes due to temperature rise is effectively avoided, meanwhile, the isolation of a main circuit and a control circuit is achieved, in a constant current control unit strategy, an Anti-wild algorithm of a condition action technology is applied, the current at the output end of a constant current source is kept in linear continuity, overshoot is reduced, the control precision is improved, the system has good dynamic quality and steady-state precision, the precision of output current is improved, PWM dimming is adopted, smooth adjustment of LED brightness can be achieved, the color cast phenomenon caused by the change of the current is avoided, and meanwhile, the electric energy utilization rate is improved.
The features and advantages of the present invention will be described in detail by embodiments in conjunction with the accompanying drawings.
[ description of the drawings ]
Fig. 1 is a schematic structural diagram of a dimmable high-power LED driving power supply according to the present invention.
[ detailed description ] embodiments
Referring to fig. 1, the dimmable high-power LED driving power supply of the present invention includes an input circuit, a main circuit, a control circuit, an optical coupling isolation unit, a hall current sensor CHB, a single-period control unit, a main circuit flyback conversion unit, a constant current source control unit and a PWM dimming unit, the main circuit and the control circuit are connected in parallel to the input circuit, the main circuit flyback conversion unit is arranged on the main circuit, the main circuit flyback conversion unit is connected to the single-period control unit, the optical coupling isolation unit is arranged on the main circuit, the optical coupling isolation unit is connected to the single-period control unit, the hall current sensor CHB is arranged on the main circuit, the hall current sensor CHB is connected to the single-period control unit, the constant current source control unit is arranged on the control circuit, and the constant current source control unit is connected to the, a PWM dimming unit is connected between the constant current source control unit and the main circuit flyback conversion unit, the constant current source control unit adopts an Anti-window controller, the constant current source control unit applies an Anti-window algorithm of a condition action technology, the Hall current sensor CHB can be selected from models CHB-25NP and CHB-SP5, the output end of the constant current source control unit is provided with an output switch tube which is connected with the single-period control unit, the optical coupling isolation unit is arranged at the front side of the main circuit flyback conversion unit and is not directly contacted with the main circuit, the Hall current sensor CHB is arranged on the front side of the main circuit flyback conversion unit, the Hall current sensor CHB is not in direct contact with the main circuit, and the number of the optical coupling isolation unit and the Hall current sensor CHB is at least two.
The input circuit, the main circuit, the control circuit, the optical coupling isolation unit, the Hall current sensor CHB, the single-period control unit, the main circuit flyback conversion unit, the constant current source control unit and the PWM dimming unit are combined together, through experimental optimization, the single-period control output voltage is adopted, the voltage precision can be controlled within 1%, under the condition that the input end voltage is disturbed, the output voltage can be equal to a voltage reference value in a switching period, the influence caused by disturbance of the input voltage is effectively inhibited, meanwhile, a subsequent circuit is regarded as a pure resistor in the single-period control process, the power factor of the whole circuit is improved, the output voltage is input into the single-period control unit through the optical coupling isolation unit after being sampled, and the main circuit is effectively isolated from the control circuit. The Hall current sensor CHB is adopted for output current detection, the model of CHB-25NP/SP5 can be selected, the detection precision is improved, the detection error caused by the fact that resistance changes due to temperature rise is effectively avoided, meanwhile, the isolation of a main circuit and a control circuit is achieved, in a constant current control unit strategy, an Anti-wild algorithm of a condition action technology is applied, the current at the output end of a constant current source is kept in linear continuity, overshoot is reduced, the control precision is improved, the system has good dynamic quality and steady-state precision, the precision of output current is improved, PWM dimming is adopted, smooth adjustment of LED brightness can be achieved, the color cast phenomenon caused by the change of the current is avoided, and meanwhile, the electric energy utilization rate is improved.
The above embodiments are illustrative of the present invention, and are not intended to limit the present invention, and any simple modifications of the present invention are within the scope of the present invention.
Claims (7)
1. The utility model provides a high-power LED drive power supply of can adjusting luminance which characterized in that: comprises an input circuit, a main circuit, a control circuit, an optical coupling isolation unit, a Hall current sensor CHB, a single-period control unit, a main circuit flyback conversion unit, a constant current source control unit and a PWM dimming unit, the input circuit is provided with a main circuit and a control circuit in parallel, the main circuit is provided with a main circuit flyback conversion unit, the main circuit flyback conversion unit is connected with the single-period control unit, the main circuit is provided with an optical coupling isolation unit, the optical coupling isolation unit and the single-period control unit, the main circuit is provided with a Hall current sensor CHB, the Hall current sensor CHB is connected with a single-period control unit, a constant current source control unit is arranged on the control circuit, the constant current source control unit is connected with the single-period control unit, and a PWM dimming unit is connected between the constant current source control unit and the main circuit flyback conversion unit.
2. The dimmable high power LED driving power supply of claim 1, wherein: the constant current source control unit adopts an Anti-window controller, and applies a conditional action technology Anti-window algorithm.
3. The dimmable high power LED driving power supply of claim 1, wherein: the Hall current sensor CHB can be selected from models CHB-25NP and CHB-SP 5.
4. The dimmable high power LED driving power supply of claim 1, wherein: the output end of the constant current source control unit is provided with an output switch tube, and the output switch tube is connected with the single-period control unit.
5. The dimmable high power LED driving power supply of claim 1, wherein: the optical coupling isolation unit is arranged on the front side of the main circuit flyback conversion unit and is not in direct contact with the main circuit.
6. The dimmable high power LED driving power supply of claim 1, wherein: the Hall current sensor CHB is arranged on the front side of the main circuit flyback conversion unit, and is not in direct contact with the main circuit.
7. The dimmable high power LED driving power supply of claim 1, wherein: the number of the optical coupling isolation units and the number of the Hall current sensors CHB are at least two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010747825.5A CN111818701A (en) | 2020-07-30 | 2020-07-30 | Dimmable high-power LED driving power supply |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010747825.5A CN111818701A (en) | 2020-07-30 | 2020-07-30 | Dimmable high-power LED driving power supply |
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| CN111818701A true CN111818701A (en) | 2020-10-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010747825.5A Pending CN111818701A (en) | 2020-07-30 | 2020-07-30 | Dimmable high-power LED driving power supply |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110109228A1 (en) * | 2009-11-06 | 2011-05-12 | Tsutomu Shimomura | System and method for lighting power and control system |
| CN102202450A (en) * | 2011-07-11 | 2011-09-28 | 江南大学 | Light-adjustable high-power LED driving power supply |
| CN103442480A (en) * | 2013-08-02 | 2013-12-11 | 江南大学 | Novel intelligent high-precision LED driving power source |
| CN104780644A (en) * | 2014-01-14 | 2015-07-15 | 江南大学 | Novel constant-current voltage-stabilization flyback type LED driving power supply |
| CN107750076A (en) * | 2017-11-22 | 2018-03-02 | 深圳中电数码显示有限公司 | A kind of LED drive circuit |
-
2020
- 2020-07-30 CN CN202010747825.5A patent/CN111818701A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110109228A1 (en) * | 2009-11-06 | 2011-05-12 | Tsutomu Shimomura | System and method for lighting power and control system |
| CN102202450A (en) * | 2011-07-11 | 2011-09-28 | 江南大学 | Light-adjustable high-power LED driving power supply |
| CN103442480A (en) * | 2013-08-02 | 2013-12-11 | 江南大学 | Novel intelligent high-precision LED driving power source |
| CN104780644A (en) * | 2014-01-14 | 2015-07-15 | 江南大学 | Novel constant-current voltage-stabilization flyback type LED driving power supply |
| CN107750076A (en) * | 2017-11-22 | 2018-03-02 | 深圳中电数码显示有限公司 | A kind of LED drive circuit |
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Application publication date: 20201023 |