CN201887977U - Drive device for constant-current and constant-voltage LED power source switching control - Google Patents
Drive device for constant-current and constant-voltage LED power source switching control Download PDFInfo
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- CN201887977U CN201887977U CN2010205695837U CN201020569583U CN201887977U CN 201887977 U CN201887977 U CN 201887977U CN 2010205695837 U CN2010205695837 U CN 2010205695837U CN 201020569583 U CN201020569583 U CN 201020569583U CN 201887977 U CN201887977 U CN 201887977U
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Abstract
The utility model provides a drive device for constant-current and constant-voltage LED power source switching control, which has simple structure, high efficiency, high power factor, and controllable and adjustable output voltage, and adopts constant-current control. The drive device comprises a main function module, an auxiliary power source function module, and a voltage and current switching control function module, wherein the main function module comprises a rectifying module and a flyback conversion function module; the voltage and current switching control function module comprises a switch module, an optical coupler, a PI compensator, a multiplier, and a comparator; the switch module is connected with the main function module through the PI compensator, the multiplier and the comparator sequentially; the auxiliary power source function module is connected with the voltage and current switching control module and the main function module; and the optical coupler is connected with the switch module and the control module. The drive device provided by the utility model has higher power source efficiency, constant-current control function for output over-voltage protection, and significance in protecting an LED power source.
Description
Technical field
The utility model relates to a kind of LED power supply, the constant current constant voltage switching controls LED power source drive device of particularly a kind of high efficiency, High Power Factor.
Background technology
Nowadays, the LED power supply is with efficiently, environmental protection, and advantage such as good backlight is used to every field, becomes the main flow of technical development.Yet also there are a lot of problems in the LED field, such as, power factor is lower, and power-efficient is mostly less than 85%, the defencive function imperfection of LED power source drive device or protective circuit complex structure etc.
Thereby existing LED power source drive device is still waiting to improve and improve.
The utility model content
In view of above-mentioned the deficiencies in the prior art part, it is a kind of simple in structure that the purpose of this utility model is to provide, the efficient height, and the power factor height, output voltage is controllable and in conjunction with the LED power source drive device of constant current control.Power-efficient is improved, and power factor reaches more than 0.96, and has the constant current controlled function of output over-voltage protection.
In order to achieve the above object, the utility model has been taked following technical scheme:
A kind of constant current constant voltage switching controls LED power source drive device comprises main functional modules, wherein, also comprises accessory power supply functional module, electric current and voltage switching control function module; Further, described main functional modules comprises rectification module and inverse-excitation converting functional module, and described electric current and voltage switching control function module comprises handover module, optical coupler, PI compensator, control module (comprising multiplier and comparator); Described handover module connects main functional modules by PI compensator, multiplier, comparator successively, and described accessory power supply functional module connects electric current and voltage switching controls module and main functional modules, and described optical coupler connects handover module and control module.
Described constant current constant voltage switching controls LED power source drive device, wherein, described rectification module comprises electromagnetic interface filter and rectifier bridge.
Described constant current constant voltage switching controls LED power source drive device, wherein, described inverse-excitation converting functional module comprises former limit master's power winding of transformer and anti-violent change depressor, first metal-oxide-semiconductor, rectifier diode and the output filter capacitor that secondary master power winding constitutes.
Described constant current constant voltage switching controls LED power source drive device, wherein, described accessory power supply functional module comprises the former limit power supply winding and the secondary power supply winding of transformer.
Described constant current constant voltage switching controls LED power source drive device, wherein, described control module comprises control chip L6561.
Described constant current constant voltage switching controls LED power source drive device, wherein, described handover module comprises chip TSM103.
A kind of constant current constant voltage switching controls LED power source drive device provided by the invention, it is simple in structure, the efficient height; the power factor height, output voltage is controllable and can control in conjunction with constant current, and power-efficient is improved; power factor reaches more than 0.96, and has the constant current controlled function of output over-voltage protection.
Description of drawings
Fig. 1 is the structured flowchart of constant current constant voltage switching controls LED power source drive device among the utility model embodiment;
Fig. 2 is the circuit theory diagrams of constant current constant voltage switching controls LED power source drive device among the utility model embodiment;
Fig. 3 is the equivalent circuit diagram of TSM103 and peripheral components among the utility model embodiment.
Embodiment
For making the purpose of this utility model, technical scheme and effect clearer, clear and definite, below with reference to accompanying drawing and give an actual example that the present invention is described in more detail.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
See also Fig. 1, the constant current constant voltage switching controls LED power source drive device that the embodiment of the invention provides comprises main functional modules, accessory power supply functional module, electric current and voltage switching control function module.Further, described main functional modules comprises rectification module and inverse-excitation converting functional module, and described electric current and voltage switching control function module comprises handover module, optical coupler, PI compensator, control module (multiplier and comparator); Described handover module connects main functional modules by PI compensator, multiplier, comparator successively, and described accessory power supply functional module connects electric current and voltage switching controls module and main functional modules, and described optical coupler connects handover module and control module.
Wherein, described rectification module comprises electromagnetic interface filter and rectifier bridge, exchanges input after electromagnetic interface filter is by rectifier bridge BD1 rectification, directly inserts the inverse-excitation converting functional module.
The inverse-excitation converting functional module comprises that anti-violent change depressor T1, the first metal-oxide-semiconductor Q1, rectifier diode D1 and output filter capacitor C3 that former limit master's power winding of transformer and secondary master power winding constitute to C5, are electric then.
Described accessory power supply functional module comprises the former limit power supply winding and the secondary power supply winding of transformer, be respectively applied for the isolation power supply of former limit and secondary chip, simultaneously, the power supply winding on former limit also has the effect of ZCD zero passage detection, and the power supply winding of secondary then also has for the function of reference voltage electric current is provided.
In order to keep stable output; need detect output voltage and electric current; and via electric current and voltage switching control function module under the power supply of accessory power supply functional module, the waveform and the regulated output voltage of control input current play open circuit short-circuit protection effect.
Further, described open-circuit-protection is the constant voltage mode of operation of LED power supply, and the LED power drives adopts constant current output drive scheme; But too high when output voltage, during corresponding LED lamp of having connected too much, this drive unit enters constant voltage mode (CV), that is a kind of overvoltage protection mode (OVP), thereby the protection drive unit avoids damaging.
Described control module comprises control chip L6561, and L6561 is the control chip of a kind of BCM (electric current critical conduction mode) of ST company.Output voltage and electric current are detected, and the control signal of process optical coupler produces error signal via the PI compensator, is input to multiplier; On the other hand, for the waveform of controlling input current to realize power factor correction, gathered the sinusoidal all-wave waveform of line voltage behind over commutation, be input to multiplier equally.The output of multiplier compares in comparator with the switching tube electric current that collects, and produces PWM (pulse duration adjustment) control signal, the waveform and the regulated output voltage (or electric current) of control input current.
Further, described handover module comprises chip TSM103, and it is a double operational, carry the chip of 2.5V benchmark.In this device, two amplifiers are respectively applied for and form Voltage loop and electric current loop in the chip, the equivalent electric circuit of itself and peripheral components as shown in Figure 3, wherein secondary power supply winding is for the TSM103 power supply and voltage reference is provided, be used for providing benchmark the Vref in the corresponding diagram 3 to Voltage loop; Benchmark after the R38 dividing potential drop, as the benchmark of electric current loop, is used for setting the output constant current value, the Iref in the corresponding diagram 3 through R36 and R37.Detect the output voltage electric current and be respectively Vin, Iin.Switching on the hardware by diode D7 of constant current and two kinds of patterns of constant voltage, D8 realizes.When output voltage or electric current satisfied certain condition, corresponding ring can be activated, and the negative electrode that specifically is exactly D7 or D8 can be dragged down, and this amplifier branch road that is then dragged down can be linked in the whole system, and another one is inoperative this moment.
The number of turn of the former limit power supply winding of transformer and secondary power supply winding should be calculated with the number of turn of main power winding.Simultaneously, because when output voltage fluctuation, the voltage of former limit power supply winding and secondary power supply winding also can float with the turn ratio relation of setting, and not only can cause the loss on the efficient, even can influence the quiescent point of circuit.So in the design of this driving power, added the three-terminal voltage-stabilizing circuit, the auxiliary power supply on former and deputy limit all is set on the stable value: the supply power voltage value deducts the pressure drop of a triode PN junction for voltage-stabiliser tube voltage.When this power supply short circuit, output voltage is pulled to zero, and this moment, former limit power supply winding and secondary power supply winding voltage all were pulled to zero, and the chip power supply on former and deputy limit supports by the electrochemical capacitor of chip side.As long as guarantee that at former limit chip because power down and before shutting down, the electrochemical capacitor of the power supply winding of secondary still can be kept secondary chip TSM103 operate as normal, then the benchmark of secondary can not become, the output of power supply just can excessively not risen violently.
In sum; what the utility model provided is a kind of simple in structure; the efficient height; the power factor height; output voltage is controllable and in conjunction with the constant current constant voltage switching controls LED power source drive device of constant current control; power-efficient is improved, and have the constant current controlled function of output over-voltage protection, play important effect for the protection of LED power supply.
Be understandable that; for those of ordinary skills; can be equal to replacement or change according to the technical solution of the utility model and inventive concept thereof, and all these changes or replacement all should belong to the protection range of the appended claim of the utility model.
Claims (6)
1. a constant current constant voltage switching controls LED power source drive device comprises main functional modules, it is characterized in that: also comprise accessory power supply functional module, electric current and voltage switching control function module; Described main functional modules comprises rectification module and inverse-excitation converting functional module, and described electric current and voltage switching control function module comprises handover module, optical coupler, PI compensator, multiplier and comparator; Described handover module connects main functional modules by PI compensator, multiplier, comparator successively, and described accessory power supply functional module connects electric current and voltage switching controls module and main functional modules, and described optical coupler connects handover module and control module.
2. constant current constant voltage switching controls LED power source drive device according to claim 1, it is characterized in that: described rectification module comprises electromagnetic interface filter and rectifier bridge.
3. constant current constant voltage switching controls LED power source drive device according to claim 1 is characterized in that: described inverse-excitation converting functional module comprises former limit master's power winding of transformer and anti-violent change depressor, first metal-oxide-semiconductor, rectifier diode and the output filter capacitor that secondary master power winding constitutes.
4. constant current constant voltage switching controls LED power source drive device according to claim 1 is characterized in that: described accessory power supply functional module comprises the former limit power supply winding and the secondary power supply winding of transformer.
5. constant current constant voltage switching controls LED power source drive device according to claim 1, it is characterized in that: described control module comprises control chip L6561.
6. constant current constant voltage switching controls LED power source drive device according to claim 1, it is characterized in that: described handover module comprises chip TSM103.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205695837U CN201887977U (en) | 2010-10-20 | 2010-10-20 | Drive device for constant-current and constant-voltage LED power source switching control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205695837U CN201887977U (en) | 2010-10-20 | 2010-10-20 | Drive device for constant-current and constant-voltage LED power source switching control |
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| Publication Number | Publication Date |
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| CN201887977U true CN201887977U (en) | 2011-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010205695837U Expired - Lifetime CN201887977U (en) | 2010-10-20 | 2010-10-20 | Drive device for constant-current and constant-voltage LED power source switching control |
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| CN (1) | CN201887977U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102497711A (en) * | 2011-12-31 | 2012-06-13 | 杭州士兰微电子股份有限公司 | LED drive circuit and switch power supply containing drive circuit |
| JP2013084380A (en) * | 2011-10-06 | 2013-05-09 | Eye Lighting Syst Corp | Led power supply circuit |
| CN103298186A (en) * | 2012-02-29 | 2013-09-11 | 成都能元科技有限公司 | LED efficient constant current driving source |
| CN103368551A (en) * | 2012-03-30 | 2013-10-23 | 海洋王照明科技股份有限公司 | A lamp and a power switch control circuit |
| CN109120164A (en) * | 2018-10-17 | 2019-01-01 | 李继前 | Switching power circuit and Switching Power Supply |
| CN109712574A (en) * | 2018-12-20 | 2019-05-03 | 深圳创维－Rgb电子有限公司 | A kind of constant pressure and flow drive control circuit, driving power and television set |
| CN110892792A (en) * | 2017-06-07 | 2020-03-17 | 魔力生物工程公司 | System and method for parallel hybrid horticulture system |
| CN112366936A (en) * | 2021-01-12 | 2021-02-12 | 四川大学 | Low-output ripple power factor correction converter |
-
2010
- 2010-10-20 CN CN2010205695837U patent/CN201887977U/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013084380A (en) * | 2011-10-06 | 2013-05-09 | Eye Lighting Syst Corp | Led power supply circuit |
| CN102497711A (en) * | 2011-12-31 | 2012-06-13 | 杭州士兰微电子股份有限公司 | LED drive circuit and switch power supply containing drive circuit |
| CN102497711B (en) * | 2011-12-31 | 2015-12-16 | 杭州士兰微电子股份有限公司 | LED drive circuit and comprise the Switching Power Supply of this drive circuit |
| CN103298186A (en) * | 2012-02-29 | 2013-09-11 | 成都能元科技有限公司 | LED efficient constant current driving source |
| CN103298186B (en) * | 2012-02-29 | 2015-06-03 | 成都能元科技有限公司 | LED efficient constant current driving source |
| CN103368551A (en) * | 2012-03-30 | 2013-10-23 | 海洋王照明科技股份有限公司 | A lamp and a power switch control circuit |
| CN103368551B (en) * | 2012-03-30 | 2017-09-29 | 海洋王照明科技股份有限公司 | A kind of light fixture and its power on-off control circuit |
| CN110892792A (en) * | 2017-06-07 | 2020-03-17 | 魔力生物工程公司 | System and method for parallel hybrid horticulture system |
| CN110892792B (en) * | 2017-06-07 | 2022-04-19 | 魔力生物工程公司 | System and method for parallel hybrid horticulture system |
| CN109120164A (en) * | 2018-10-17 | 2019-01-01 | 李继前 | Switching power circuit and Switching Power Supply |
| CN109712574A (en) * | 2018-12-20 | 2019-05-03 | 深圳创维－Rgb电子有限公司 | A kind of constant pressure and flow drive control circuit, driving power and television set |
| CN112366936A (en) * | 2021-01-12 | 2021-02-12 | 四川大学 | Low-output ripple power factor correction converter |
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Granted publication date: 20110629 |