CN104994637B - A kind of LED lamp power supply - Google Patents
A kind of LED lamp power supply Download PDFInfo
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- CN104994637B CN104994637B CN201510382193.6A CN201510382193A CN104994637B CN 104994637 B CN104994637 B CN 104994637B CN 201510382193 A CN201510382193 A CN 201510382193A CN 104994637 B CN104994637 B CN 104994637B
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Abstract
A kind of LED lamp power supply, it includes a primary circuit module, one with the secondary circuit modules of the primary circuit module electrical couplings, one PWM adjusting control circuit module being electrically connected with the secondary circuit module, and an EMI filtration module being electrically connected with the PWM adjusting control circuits module.The PWM adjusting control circuits module and the primary circuit module electrical couplings obtain electric power and to the secondary circuit module transfer dim signals.The EMI filtration modules form a loop for eliminating PWM adjusting control circuits module caused common mode interference signal in output pwm signal with the PWM adjusting control circuits module and primary circuit module.The EMI filtration modules caused common mode interference signal when the loop that power source internal is formed can eliminate the PWM adjusting control circuits module in output pwm signal, so as to avoid the common mode interference signal from entering in EMI test networks, reach the purpose tested by EMI.
Description
Technical field
The present invention relates to a kind of power-supply device of illuminator, particularly a kind of LED lamp power supply.
Background technology
In in general daily life, all visible various lighting apparatus everywhere, for example, fluorescent lamp, street lamp, desk lamp, skill
Art lamp etc..In above-mentioned lighting apparatus, traditionally most of is as illuminating source with osram lamp.In recent years, due to section
Skill is maked rapid progress, and is used as light sources by the use of light emitting diode (LED).Notably, in addition to lighting apparatus, for general traffic number
Will, billboard, car light etc., also it is changed to use light emitting diode as illuminating source.As it was previously stated, made using light emitting diode
For illuminating source, it is advantageous in that power saving, and brightness is bigger, therefore in the upper gradual generalization of use.
With the popularization of LED lamp, increasing occasion begins to use LED lamp.However, due to LED chip in itself
Characteristic, and the characteristic parameter of existing civil power, it is necessary to which it is its power supply to provide proprietary power supply for LED chip.I.e. because LED chip
For a kind of direct current constant current low-voltage component, therefore that civil power must be converted to the direct current that the suitable LED chip uses is permanent for the power supply
Flow low-tension current.In addition with the change of people's life requirement, be no longer satisfied with single brightness, color that LED sent,
And the light of colour temperature, therefore adjusted in good time with the demand according to user, it is necessary to add control input circuit in the circuit of LED lamp
The characterisitic parameter for the light that section LED is sent.
Because above-mentioned power supply and control input circuit can all have electromagnetic wave generation at work, these electromagnetic waves can be done
The normal work of the TV that other electrical equipment such as family uses in whole circuit etc. is disturbed, therefore not only needs the input in power supply etc.
End carries out Electromagnetic Interference Test (EMI), and is that control terminal is also required to carry out Electromagnetic Interference Test in control input circuit.
The content of the invention
In view of this, it is necessary to which a kind of LED lamp power supply for the electromagnetic interference that can eliminate control terminal is provided.
A kind of LED lamp power supply includes a primary circuit module, one with time of the primary circuit module electrical couplings
Level circuit module, one with the secondary circuit module electric connection PWM adjusting control circuit modules, and one with it is described
The EMI filtration modules that PWM adjusting control circuits module is electrically connected with.The PWM adjusting control circuits module and the primary electrical
Road module electrical couplings obtain electric power and to the secondary circuit module transfer dim signals.The EMI filtration modules with it is described
PWM adjusting control circuits module and primary circuit module form a loop for eliminating the PWM adjusting control circuits mould
Block caused common mode interference signal when exporting dim signal.The EMI filtration modules include an electric capacity, the electric capacity
Both ends are electrically connected with the ground of the PWM adjusting control circuits module and the ground of primary circuit module respectively.
Compared with prior art, should because LED lamp power supply provided by the present invention has described EMI filtration modules
EMI filtration modules can form a loop in power source internal, and the loop can eliminate the PWM adjusting control circuits module and exist
Caused common mode interference signal when exporting dim signal, so as to avoid the common mode interference signal from entering in EMI test networks, reach
To the purpose tested by EMI.
Brief description of the drawings
Embodiments of the invention are described below in conjunction with accompanying drawing, wherein：
Fig. 1 is a kind of circuit theory diagrams of LED lamp provided by the invention.
The circuit diagram for the LED lamp power supply that Fig. 2 is provided by first embodiment of the invention.
The circuit diagram for the LED lamp power supply that Fig. 3 is provided by second embodiment of the invention.
Embodiment
The specific embodiment of the present invention is further elaborated below based on accompanying drawing.It should be appreciated that this place is retouched
The specific embodiment stated only is used as embodiment, the protection domain being not intended to limit the present invention.
Referring to Fig. 1, it is the circuit theory diagrams of LED lamp power supply 100 provided by the invention.The LED lamp power supply
100 include a primary circuit module 10, one with the secondary circuit modules 11 of the electrical couplings of primary circuit module 10, one
The PWM adjusting control circuits module 12 being electrically connected with the secondary circuit module 11, one and the PWM adjusting control circuit modules
The 12 EMI filtration modules 13 being electrically connected with, one is electrically connected at the PWM adjusting control circuits module 12 and secondary circuit mould
Light modulation isolation control module 14 between block 11, and one with the tune of the electrical couplings of PWM adjusting control circuits module 12
Light device 15.
Also referring to Fig. 2, the circuit diagram of its LED lamp power supply 100 provided by first embodiment of the invention.It is described
Primary circuit module 10 includes an EMI filter circuit 101 being electrically connected with civil power, and one is electrically connected at the EMI filters
The rectification circuit 102 of the output end of wave circuit 101, a primary control circuit module 103, and one and the rectification circuit
The 102 primary voltage modular converters 104 being electrically connected with.The EMI filter circuit 101 is used to filter out to be done by what the civil power was brought into
Signal is disturbed, it includes at least one common mode inductance L to suppress to disturb.In the first embodiment, the EMI filter circuit 101 is wrapped
Include common mode inductance L1, L2 of two series connection.The rectification circuit 102 is the bridge rectifier being made up of multiple diodes, its
The alternating current of civil power is converted into direct current.The primary control circuit module 103 includes a Master control chip N1 and one
The metal-oxide-semiconductor Q2 controlled by Master control chip N1.By the primary control circuit module 103 with control the primary voltage turn
Mold changing block 104 works.The primary voltage modular converter 104 includes two parts, and a part is used to be the secondary circuit mould
Block 11 provides electric power, and another part is that the PWM adjusting control circuits module 12 provides electric power.The primary circuit module 10
Modules and its function are all known by those skilled in the art, be will not be repeated here.
The secondary circuit module 11 and the electrical couplings of primary circuit module 10.Specifically, the secondary circuit mould
Block 11 includes a secondary voltage modular converter 111 coupled with the primary voltage modular converter 104, and one electrically connects
It is connected on the DC/DC control chips 112 of the output end of the secondary voltage modular converter 111.The secondary voltage modular converter 111
For providing electric power for the DC/DC control chips 112.The DC/DC control chips 112 are used for the fixation DC voltage of input
Be converted to variable DC voltage and output.LED load is electrically connected at the output end of the DC/DC control chips 112.It is described
DC/DC control chips 112 include a light modulation port, and the light modulation port electrically connects with the PWM adjusting control circuits module 12
Connect to receive the dim signal that the PWM adjusting control circuits module 12 exports, i.e. pwm signal.
The PWM adjusting control circuits module 12 and the electrical couplings of primary circuit module 10.Specifically, the PWM
Adjusting control circuit module 12 includes a voltage transformation module 121 coupled with the primary voltage modular converter 104, and
Circuit 122 occurs for one pwm signal.The voltage transformation module 121 is used to provide electricity for pwm signal generation circuit 122
Power.The pwm signal occurs circuit 122 and is used to produce pulse width modulating signal, i.e. pwm signal, namely dim signal.And
During the generation pwm signal of circuit 122 occurs for the pwm signal, when flying up or decline such as voltage, i.e., common mode letter can be produced
Number.Technology of the pwm signal generation circuit 122 known by those skilled in the art, the operational amplifier included by it, two
Pole pipe, triode, and caused common-mode signal are all known techniques, be will not be repeated here.
The EMI filtration modules 13 include an electric capacity C36, and in the present embodiment, the electric capacity C36 is safety electric capacity.
In the first embodiment, electric capacity C36 be connected on the PWM adjusting control circuits module 12 and the primary circuit module 10 it
Between, specifically, the electric capacity C36 is connected on the ground of the PWM adjusting control circuits module 12 and the primary circuit module 10
Primary voltage modular converter 104 ground between, and with the PWM dimming controlling modules 12 and the primary circuit module
10 form a loop.So as in the current loop that is internally formed of the LED lamp power supply 100, and then can be by PWM
Caused common-mode signal consumes in generation circuit 121, avoids the common-mode signal from entering in EMI test networks and disturbs EMI tests,
Reach the purpose tested by EMI.
The light modulation isolation control module 14 is used to be dielectrically separated from the PWM adjusting control circuits module 12 and secondary circuit
Module 11.Because 0-10 volts on the market or the quality of the light modulator 15 of 1-10 volts are uneven, insulation is difficult to ensure that, when
Some component wear of the inside of light modulator 15 causes high current such as civil power to be loaded directly into secondary circuit module 11, it will burns
The DC/DC control chips 112 or LED chip load etc..Therefore light modulation isolation control module 14 is needed to be used as protection circuit.
In the present embodiment, the light modulation isolation control module 14 includes an optocoupler diode N7.
The light modulator 15 is the technology known by those skilled in the art, and it can input 0-10 according to the requirement of user
The variable signal of volt or 1-10 volts.The variable signal is loaded into the PWM square-wave signals of the pwm signal generation circuit 122 simultaneously
It is transferred in secondary circuit module 11, so as to reach the purpose for the output signal for controlling the DC/DC control chips 112, and then
The input power that LED chip can be controlled to load, reach the purpose of the parameters such as brightness, the colour temperature of adjustment LED chip.
Compared with prior art, by the LED lamp power supply 100 that first embodiment of the invention is provided is with described
EMI filtration modules 13, the EMI filtration modules 13 can form a loop in power source internal, and the loop can eliminate the PWM
The caused common mode interference signal when exporting dim signal and being pwm signal of adjusting control circuit module 12, so as to avoid this common
Mould interference signal enters in EMI test networks, reaches the purpose tested by EMI.
A kind of as shown in figure 3, circuit diagram of its LED lamp power supply 200 provided by second embodiment of the invention.It is described
Lamp power 200 includes a primary circuit module 20, one with the secondary circuit moulds of the electrical couplings of primary circuit module 20
Block 21, a PWM adjusting control circuits module 22 being electrically connected with the secondary circuit module 21, one controls with PWM light modulations
The EMI filtration modules 23 that circuit module 22 processed is electrically connected with, one be electrically connected at the PWM adjusting control circuits module 22 with
Light modulation isolation control module 24 between secondary circuit module 21, and one and the electricity of the PWM adjusting control circuits module 22
Property coupling light modulator 25.
Second embodiment is different from the connected mode for differing only in the EMI filtration modules 23 of first embodiment, and
Other functional modules and connected mode are all identical with first embodiment.In described second implements embodiment, the EMI filtering
Module 23 is connected between the PWM dimming controlling modules 22 and the secondary circuit module 21.Specifically, the EMI filtering
Module 23 forms one with the PWM dimming controlling modules 22, the primary circuit module 20 and the secondary circuit module 21
Individual loop, so as to eliminate the PWM adjusting control circuits module 22 output dim signal, i.e., pwm signal when it is produced
Common mode interference signal, so as to avoid the common mode interference signal enter EMI test networks in, reach by EMI test purpose.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
Interior made all any modification, equivalent and improvement of god and principle etc., should be included in the scope of the protection.
Claims (6)
- A kind of 1. LED lamp power supply, it is characterised in that：The LED lamp power supply includes a primary circuit module, and one with being somebody's turn to do The secondary circuit module of primary circuit module electrical couplings, a PWM brightness adjustment control being electrically connected with the secondary circuit module Circuit module, and an EMI filtration module being electrically connected with the PWM adjusting control circuits module, the PWM light modulations control Circuit module processed and the primary circuit module electrical couplings obtain electric power and to the secondary circuit module transfer dim signals, The EMI filtration modules form a loop for eliminating with the PWM adjusting control circuits module and primary circuit module The PWM adjusting control circuits module caused common mode interference signal, EMI filtration modules bag when exporting dim signal Include an electric capacity, the both ends of the electric capacity respectively with the ground of the PWM adjusting control circuits module and the ground of primary circuit module It is electrically connected with.
- 2. LED lamp power supply as claimed in claim 1, it is characterised in that：The secondary circuit module includes a DC/DC and controlled Coremaking piece, it is variable DC voltage and output that the DC/DC control chips, which are used for the DC voltage conversion of the fixation of input,.
- 3. LED lamp power supply as claimed in claim 2, it is characterised in that：The DC/DC control chips include a light modulation end Mouthful, the light modulation port is electrically connected with defeated to receive the PWM adjusting control circuits module with the PWM adjusting control circuits module The dim signal gone out.
- 4. LED lamp power supply as claimed in claim 1, it is characterised in that：The electric capacity is a safety electric capacity.
- 5. LED lamp power supply as claimed in claim 1, it is characterised in that：The LED lamp power supply also include one with it is described The light modulator of PWM adjusting control circuit module electrical couplings, the output signal of the light modulator lied prostrate for 0-10 or 1-10 volts it is variable Signal.
- 6. LED lamp power supply as claimed in claim 1, it is characterised in that：The LED lamp power supply also electrically connects including one It is connected on the PWM adjusting control circuits module and isolates control module with the light modulation between secondary circuit module, light modulation isolation control Molding block is used to be dielectrically separated from the PWM adjusting control circuits module and secondary circuit module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510382193.6A CN104994637B (en) | 2015-06-29 | 2015-06-29 | A kind of LED lamp power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510382193.6A CN104994637B (en) | 2015-06-29 | 2015-06-29 | A kind of LED lamp power supply |
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| Publication Number | Publication Date |
|---|---|
| CN104994637A CN104994637A (en) | 2015-10-21 |
| CN104994637B true CN104994637B (en) | 2018-02-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510382193.6A Active CN104994637B (en) | 2015-06-29 | 2015-06-29 | A kind of LED lamp power supply |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107426874B (en) * | 2017-08-25 | 2024-03-15 | 赛尔富电子有限公司 | Dimming control power supply for LED lamp |
| CN107787085A (en) * | 2017-10-18 | 2018-03-09 | 浙江凯耀照明股份有限公司 | 0 10V of one kind light modulation isolation LED power circuits |
| CN110213856A (en) * | 2019-06-06 | 2019-09-06 | 矽力杰半导体技术(杭州)有限公司 | Light adjusting circuit and method |
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| CN101568219A (en) * | 2008-04-23 | 2009-10-28 | 鸿富锦精密工业（深圳）有限公司 | Light source driving device |
| CN101861016A (en) * | 2010-05-11 | 2010-10-13 | 南通中润照明电器有限公司 | Dimming switch power supply device of LED lamp |
| CN202206617U (en) * | 2011-08-26 | 2012-04-25 | 上海新华电子设备有限公司 | Constant-current dimming driving power supply for LED lighting |
| CN202565520U (en) * | 2012-03-14 | 2012-11-28 | 深圳市海骏电子科技有限公司 | LED dimming driver and LED light source system |
| CN202759646U (en) * | 2012-08-20 | 2013-02-27 | 深圳市索源科技有限公司 | Power indicator |
| CN203326873U (en) * | 2013-05-24 | 2013-12-04 | 西子电梯集团有限公司 | Hardware-interlocking variable-frequency drive driving circuit and variable-frequency drive |
| CN203368867U (en) * | 2013-08-02 | 2013-12-25 | 江南大学 | Novel intelligent high-precision LED driving power supply |
| CN204795738U (en) * | 2015-06-29 | 2015-11-18 | 赛尔富电子有限公司 | LED lamps and lanterns power |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203813608U (en) * | 2014-05-09 | 2014-09-03 | 深圳长城开发科技股份有限公司 | Filtering module and filter for suppressing motor EMI |
| CN204335111U (en) * | 2015-01-27 | 2015-05-13 | 西安极众数字通讯有限公司 | A kind of LED novel intelligent power supply of binary channels tunable optical color-temperature regulating |
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2015
- 2015-06-29 CN CN201510382193.6A patent/CN104994637B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101568219A (en) * | 2008-04-23 | 2009-10-28 | 鸿富锦精密工业（深圳）有限公司 | Light source driving device |
| CN101861016A (en) * | 2010-05-11 | 2010-10-13 | 南通中润照明电器有限公司 | Dimming switch power supply device of LED lamp |
| CN202206617U (en) * | 2011-08-26 | 2012-04-25 | 上海新华电子设备有限公司 | Constant-current dimming driving power supply for LED lighting |
| CN202565520U (en) * | 2012-03-14 | 2012-11-28 | 深圳市海骏电子科技有限公司 | LED dimming driver and LED light source system |
| CN202759646U (en) * | 2012-08-20 | 2013-02-27 | 深圳市索源科技有限公司 | Power indicator |
| CN203326873U (en) * | 2013-05-24 | 2013-12-04 | 西子电梯集团有限公司 | Hardware-interlocking variable-frequency drive driving circuit and variable-frequency drive |
| CN203368867U (en) * | 2013-08-02 | 2013-12-25 | 江南大学 | Novel intelligent high-precision LED driving power supply |
| CN204795738U (en) * | 2015-06-29 | 2015-11-18 | 赛尔富电子有限公司 | LED lamps and lanterns power |
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| Publication number | Publication date |
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| CN104994637A (en) | 2015-10-21 |
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