CN109982485A - Constant current output adjusts circuit - Google Patents
Constant current output adjusts circuit Download PDFInfo
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- CN109982485A CN109982485A CN201910307592.4A CN201910307592A CN109982485A CN 109982485 A CN109982485 A CN 109982485A CN 201910307592 A CN201910307592 A CN 201910307592A CN 109982485 A CN109982485 A CN 109982485A
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- 238000010586 diagram Methods 0.000 description 8
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- 101100190530 Arabidopsis thaliana PIN8 gene Proteins 0.000 description 4
- 102000005591 NIMA-Interacting Peptidylprolyl Isomerase Human genes 0.000 description 3
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- 101150087393 PIN3 gene Proteins 0.000 description 3
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- 108010033711 Telomeric Repeat Binding Protein 1 Proteins 0.000 description 3
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Classifications
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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]
- H05B45/10—Controlling the intensity of the light
Abstract
This application discloses a kind of constant current outputs to adjust circuit, which includes secondary load detection module, the quantity for loading in detection circuit, and exports corresponding feedback voltage according to the quantity of the load；Sub-adjusting module is electrically connected with the secondary load detection module, for receiving the feedback voltage, the pwm signal of duty ratio corresponding is converted into according to the feedback voltage level, and pass through pwm signal described in opto-coupled feedback；Primary adjustment module is electrically connected with the sub-adjusting module, exports corresponding output electric current for receiving the pwm signal of the sub-adjusting module feedback, and according to the pwm signal.By foregoing circuit, the overcurrent Problem of Failure generated in the case where loading failure in conventional driving circuit is efficiently solved, can automatically adjust constant current output according to the case where load, and reduce hardware cost by the multiple loads of power drives.
Description
Technical field
The present invention relates to electronic technology fields more particularly to a kind of constant current output to adjust circuit.
Background technique
Constant current technology is widely used at present, and general output is constant current, such as in order to drive LED light group, is just needed
Want constant-current source.
It uses a common LED power supply (or power supply with dimming function) on the market at present, drives the main of more fluorescent tubes
Circuit has following four classes: first is that directly driving more fluorescent tubes using common LED constant-current supply；Second is that using common LED Constant Electric Current
Source and light adjusting circuit directly drive more fluorescent tubes；Third is that driving more using common LED constant-current supply and secondary DC constant-current circuit
Fluorescent tube；Fourth is that driving more fluorescent tubes using common LED constant-current supply and secondary light modulation DC constant-current circuit.
Wherein, common constant current LED power supplies directly drive the mode of more LED lamp tubes, because of LED power constant output current,
It is required that LED power must be fully loaded with, the failure of fluorescent tube overcurrent otherwise will lead to, therefore the power supply application method of which is not flexible；The
The two kinds of constant-current supplies of mode with dimming function can suitably adjust electric power outputting current size, but when power supply maximum current is defeated
When out, equally possess the problems in first way；The third mode increases multichannel DC continuous current in power supply secondary, solves
The problem of first way, but cost is many higher, while secondary constant-current circuit reduces efficiency；4th kind of mode passes through light modulation
Power supply and DC constant-current circuit, solve the problems, such as the second way, but more many higher than second way cost, while two-stage electricity
Road reduces efficiency.
Summary of the invention
The embodiment of the present invention provides a kind of constant current output adjusting circuit, can be defeated according to automatic adjustment constant current the case where load
Out, and hardware cost is reduced.
A kind of constant current output adjusting circuit, comprising:
Secondary load detection module, the quantity for being loaded in detection circuit, and according to the output pair of the quantity of the load
The feedback voltage answered；
Sub-adjusting module is electrically connected with the secondary load detection module, for receiving the feedback voltage, according to institute
The pwm signal that feedback voltage level is converted into duty ratio corresponding is stated, and passes through pwm signal described in opto-coupled feedback；
Primary adjustment module is electrically connected with the sub-adjusting module, for receiving the sub-adjusting module feedback
Pwm signal, and according to the output electric current of the corresponding ratio of pwm signal output.
Optionally, the secondary load detection module includes comparing unit in one of the embodiments, described relatively more single
The input terminal of member is electrically connected with reference voltage end, load connecting pin, output end and sub-adjusting the module electricity of the comparing unit
Connection, the comparing unit are used to export corresponding feedback voltage to the sub-adjusting module according to load connection.
Optionally, the comparing unit includes multiple comparators in one of the embodiments, and the multiple comparator is simultaneously
Connection, the non-inverting input terminal of each comparator is set as predetermined reference voltage, inverting input terminal is electrically connected with load connecting pin,
The inverting input terminal and load connecting pin indirect diode to ground terminal；When have load access when, the comparator it is defeated
Outlet exports low level.
Optionally, the sub-adjusting module includes that the voltage input being sequentially connected electrically connects in one of the embodiments,
Mouth, dimming control unit, opto-coupled feedback unit, the voltage input interface are used to input the voltage of dim signal, the light modulation
Control unit is used for the corresponding pwm signal of voltage output according to the dim signal, and anti-by the opto-coupled feedback unit
It is fed to the primary adjustment module.
Optionally, the dimming control unit includes brightness adjustment control chip in one of the embodiments, the light modulation control
Coremaking piece includes light modulation pin and PWM output pin, and the light modulation pin is for inputting dim signal, the PWM output pin
For output pwm signal.
Optionally, the voltage range of the dim signal is 0~10V in one of the embodiments,.
Optionally, in one of the embodiments, the primary adjustment module include the main control unit being successively electrically connected,
Switch unit and converting unit, for the main control unit for receiving the pwm signal, the duty ratio according to the pwm signal is defeated
Correspond to the output electric current of ratio out, and adjusted by the switch unit and converting unit the output electric current is applied to it is negative
It carries.
Optionally, the main control unit includes primary side single-level power factor correction chip in one of the embodiments,.
Optionally, the load includes LED light in one of the embodiments,.
Optionally, the load includes 4 paths of LEDs lamps in one of the embodiments,.
Implement the embodiment of the present invention, will have the following beneficial effects:
Above-mentioned constant current output adjusts circuit, by the quantity loaded in secondary load detection module detection circuit, and according to
The quantity of the load exports corresponding feedback voltage, receives the feedback voltage by sub-adjusting module, according to described anti-
Feedthrough voltage value is converted into the pwm signal of duty ratio corresponding, and by pwm signal described in opto-coupled feedback, is connect by primary adjustment module
The pwm signal of the sub-adjusting module feedback is received, and exports the output electric current of corresponding ratio according to the pwm signal.Pass through
Foregoing circuit efficiently solves the overcurrent Problem of Failure generated in the case where loading failure in conventional driving circuit, can pass through
One multiple load of power drives can automatically adjust constant current output according to the case where load, and reduce hardware cost.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Wherein:
Fig. 1 is the structural block diagram that constant current output adjusts circuit in one embodiment；
Fig. 2 is the structural block diagram of secondary load detection module in one embodiment；
Fig. 3 is secondary load detection module and 0-10V adjusting control circuit schematic diagram in one embodiment；
Fig. 4 is the structural block diagram of sub-adjusting module in one embodiment；
Fig. 5 is that pin and the corresponding duty cycle relationship schematic diagram of PWM output pin are dimmed in one embodiment；
Fig. 6 is the structural block diagram of primary adjustment module in one embodiment；
Fig. 7 is that the corresponding relationship of the output PWM duty cycle of primary adjustment module and output electric current is illustrated in one embodiment
Figure.
Specific embodiment
It is with reference to the accompanying drawings and embodiments, right in order to which the objects, technical solutions and advantages of the application are more clearly understood
The application is further elaborated.It should be appreciated that specific embodiment described herein is only used to explain the application, and
It is not used in restriction the application.
Unless otherwise defined, all technical and scientific terms used herein and the technical field for belonging to the application
The normally understood meaning of technical staff is identical.The term used in the description of the present application is intended merely to description tool herein
The purpose of the embodiment of body, it is not intended that limitation the application.It is appreciated that term " first " used in this application, " second "
Etc. can be used to describe various elements herein, but these elements should not be limited by these terms.These terms are only used to by first
A element and another element are distinguished.For example, in the case where not departing from scope of the present application, first element can be claimed
For second element, and similarly, second element can be known as first element.First element and second element both first device
Part, but it is not same component.
As shown in Figure 1, adjusting the structural block diagram of circuit, constant current provided in this embodiment for constant current output in one embodiment
Output regulating circuitry can automatically adjust constant current output according to the case where load, and reduce hardware cost.The present embodiment is with this
Constant current output adjusts circuit and is applied in LED lamp drive circuit as an example, it should be noted that the constant current output is adjusted
Circuit can also be applied in the driving circuit of other Constant Current Loads, and the present embodiment is without being limited thereto.The constant current output adjusts circuit
Including the primary adjustment module 110, sub-adjusting module 120 and secondary load detection module 130 being sequentially connected electrically.
Wherein, quantity of the secondary load detection module 130 for being loaded in detection circuit, and according to the quantity of the load
Export corresponding feedback voltage.Such as when load is LED light, secondary load detection module 130 is responsible for LED light in detection circuit
Quantity, and corresponding feedback voltage is exported according to the quantity of LED light, to realize the feedback to LED light quantity.
Sub-adjusting module 120 is used to receive the feedback voltage of the output of secondary load detection module 130, according to feedback electricity
Pressure value is converted into the pwm signal of duty ratio corresponding, and passes through the opto-coupled feedback pwm signal.Specifically, when the number loaded in circuit
When amount changes, corresponding feedback voltage is exported according to the quantity of load by secondary load detection module 130 at this time, it is secondary
Adjustment module 120 can export the pwm signal of duty ratio corresponding according to the feedback voltage, thus output required for matched load
Electric current.
Primary adjustment module 130 is used to receive the pwm signal of the feedback of sub-adjusting module 120, and according to the pwm signal
Export the output electric current of corresponding ratio.
Constant current output provided by the embodiment adjusts circuit, efficiently solves in conventional driving circuit in the case where loading failure
The overcurrent Problem of Failure of generation, can be by the multiple loads of power drives, can be permanent according to automatic adjustment the case where load
Stream output, and reduce hardware cost.
In one embodiment, as shown in Fig. 2, secondary load detection module includes comparing unit 210, comparing unit 210
Input terminal and reference voltage end 220, load connecting pin 230 be electrically connected, the output end and sub-adjusting module of comparing unit 210
Electrical connection, comparing unit 210 are used to export feedback voltage to sub-adjusting module according to load connection.Specifically, passing through
Reference voltage end is set in the input terminal of comparing unit 210 and accesses reference voltage, it can passes through load connecting pin and reference
The connection status that the voltage-contrast result of voltage end is loaded.
In one embodiment, comparing unit includes multiple comparators, and the multiple comparator is in parallel, each comparison
The non-inverting input terminal of device is set as predetermined reference voltage, inverting input terminal is electrically connected with load connecting pin, in the anti-phase input
It holds and the indirect diode of load connecting pin to ground terminal；When there is load to access, the output end of the comparator exports low level.
For example, as shown in figure 3, being the circuit diagram of secondary load detection module in one embodiment, the secondary
Load detecting module is mainly made of elements such as U3/U4/U5/U6, wherein U3, U4 be voltage comparator, operating voltage 12V,
The non-inverting input terminal voltage of comparator U3_A, U3_B, U4_A, U4_B are set as 0.1V, and anti-phase input terminates diode to ground.When
When there is LED light access on any road, diode generates 0.7V pressure drop, and inverting input terminal voltage is higher than non-inverting input terminal voltage at this time,
Then the comparator exports low level 0V.It can similarly obtain, when any road does not have LED light access, which exports high level
12V。
Further, U5, U6 are also voltage comparator, and operating voltage is similarly 12V.Comparator U5_B, U6_A, U6_B's
Non-inverting input terminal voltage is respectively as follows: 5V, 3V, 1V.When the inverting input terminal voltage of any one comparator is higher than non-inverting input terminal electricity
When pressure, which exports low level 0V, conversely, the comparator exports high level 12V.This implementation detects mould by secondary load
Block can accurately reflect the connection status loaded in circuit, in order to which primary adjustment module can be real according to the connection of load
When adjust output electric current, meets the needs of passing through a power drives multiple Constant Current Loads.
Circuit operation principle is explained below, the present embodiment is by taking 4 groups of LED light as an example.When the quantity of LED light is
At 1 group (for accessing LED4), the PIN2 voltage of comparator U3-A is lower than PIN3 voltage at this time, then PIN1 exports high level
12V；The PIN6 voltage of comparator U3-B is lower than PIN5 voltage, then PIN7 exports high level 12V；The PIN2 voltage of comparator U4-A
Lower than PIN3 voltage, then PIN1 exports high level 12V；The PIN6 voltage of comparator U4-B is greater than PIN5 voltage, then PIN7 is exported
Low level 0V.It is then 7.2V according to the voltage that circuit in parallel relationship combination Ohm's law calculates TP3 point.Further, TP2 point is logical
Resistance R39, R40 partial pressure are crossed, the voltage for calculating TP2 point is 6.48V, and the PIN6 voltage of comparator U5-B is higher than PIN5 electricity at this time
Pressure, PIN7 export low level 0V；The PIN2 voltage of comparator U6-A is higher than PIN3 voltage, and PIN1 exports low level 0V；Comparator
The PIN6 voltage of U6-B is higher than PIN5 voltage, and PIN7 exports low level 0V；Similarly according to circuit in parallel relationship combination Ohm's law
The voltage for calculating secondary load detection module feedback is 2.5V, then feeds back to sub-adjusting by secondary load detection module at this time
The voltage of module is 2.5V, and when the voltage that sub-adjusting module obtains is 2.5V, the pwm signal that sub-adjusting module calculates is defeated
Duty ratio is 25% out, then the corresponding output electric current of primary adjustment module is 25%.
It can similarly obtain, when the quantity of LED light is 2 groups, sub-adjusting module is fed back to by secondary load detection module
Voltage be 5V, when sub-adjusting module obtain voltage be 5V when, sub-adjusting module calculate pwm signal output duty cycle
It is 50%, then the corresponding output electric current of primary adjustment module is 50%.When the quantity of LED light is 3 groups, examined by secondary load
The voltage for surveying module feedback to sub-adjusting module is 7.5V, and when the voltage that sub-adjusting module obtains is 7.5V, secondary is adjusted
Saving the pwm signal output duty cycle that module calculates is 75%, then the corresponding output electric current of primary adjustment module is 75%.Work as LED
When the quantity of lamp is 4 groups, the voltage that sub-adjusting module is fed back to by secondary load detection module is 11V, works as sub-adjusting
When the voltage that module obtains is greater than 10V, the pwm signal output duty cycle that sub-adjusting module calculates is 100%, then primary to adjust
The corresponding output electric current of module is 100%.
In one embodiment, as shown in figure 4, sub-adjusting module include the voltage input interface 410 being sequentially connected electrically,
Dimming control unit 420 and opto-coupled feedback unit 430.Voltage input interface 410 is used to input the voltage of 0-10V dim signal,
Dimming control unit 420 is used for the corresponding pwm signal of voltage output according to the dim signal, and passes through opto-coupled feedback unit
430 feed back to the primary adjustment module.Dimming control unit 420 includes brightness adjustment control chip, the brightness adjustment control chip packet
Light modulation pin and PWM output pin are included, the light modulation pin is for inputting dim signal, and the PWM output pin is for exporting
Pwm signal.
In one embodiment, the light modulation pin and the corresponding duty cycle relationship of PWM output pin are as shown in figure 5, in Fig. 5
Horizontal axis represents the voltage value of the dim signal of light modulation pin input, and the longitudinal axis represents the duty of the pwm signal of PWM output pin output
Than.
Specifically, voltage input interface 410 (as shown in Figure 3), can form DIM by triode, voltage-stabiliser tube and diode:
0-10V dim signal input circuit；Dimming control unit 420 may include secondary 0-10V brightness adjustment control chip, opto-coupled feedback list
Member 430 may include optocoupler 817.The control process of sub-adjusting module includes: by adjusting DIM:0-10V dim signal electricity
Pressure controls the pole triode E output voltage, calculates in conjunction with Ohm's law, and then adjusts the feedback voltage of load detecting module, generates
0-10V controls signal voltage, and secondary 0-10V brightness adjustment control chip inputs the voltage, and it is defeated to adjust secondary 0-10V brightness adjustment control chip
The pwm signal is fed back to primary adjustment module by optocoupler 817 by pwm signal duty ratio out, so that primary adjustment module
Adjust output electric current.
In one embodiment, primary adjustment module includes the main control unit 610 being successively electrically connected, switch unit 620
With converting unit 630, main control unit 610 is used to receive the pwm signal of sub-adjusting module output, according to the pwm signal
Duty ratio exports the output electric current of corresponding ratio, and is adjusted by switch unit 620 and converting unit 630 by the output electric current
It is applied to load.Specifically, main control unit 610 may include primary side single-level power factor correction chip, and function is dimmed with PWM
Can, which corrects chip by adjusting the size of output electric current, such as realization pair according to PWM duty cycle
The dimming function of LED.
In one embodiment, corresponding relationship such as Fig. 7 institute of the output PWM duty cycle of primary adjustment module and output electric current
Show, horizontal axis represents output PWM duty cycle in Fig. 7, and the longitudinal axis represents the percentage of output electric current.
In one embodiment, the load includes LED light, such as the load specifically can be 4 paths of LEDs lamps.This implementation
Example can automatically adjust electric power outputting current size according to the fluorescent tube quantity detected by secondary load detection module, and have
0-10V dimming function.When fluorescent tube quantity is 1,25% electric current is exported；When fluorescent tube quantity is 2,50% electric current is exported；
When fluorescent tube quantity is 3,75% electric current is exported；When fluorescent tube quantity is 4,100% electric current is exported；Meanwhile power supply has
0-10V dimming function.
Circuit is adjusted by above-mentioned constant current output, efficiently solves in conventional driving circuit and is generated in the case where loading failure
Overcurrent Problem of Failure, can by the multiple loads of power drives, can according to load the case where automatic adjustment constant current it is defeated
Out, and hardware cost is reduced.
The several embodiments of the application above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
The limitation to the application the scope of the patents therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the concept of this application, various modifications and improvements can be made, these belong to the guarantor of the application
Protect range.Therefore, the scope of protection shall be subject to the appended claims for the application patent.
Claims (10)
1. a kind of constant current output adjusts circuit characterized by comprising
Secondary load detection module, the quantity for being loaded in detection circuit, and it is corresponding according to the output of the quantity of the load
Feedback voltage；
Sub-adjusting module is electrically connected with the secondary load detection module, for receiving the feedback voltage, according to described anti-
Feedthrough voltage value is converted into the pwm signal of duty ratio corresponding, and passes through pwm signal described in opto-coupled feedback；
Primary adjustment module is electrically connected with the sub-adjusting module, and the PWM for receiving the sub-adjusting module feedback believes
Number, and corresponding output electric current is exported according to the pwm signal.
2. constant current output according to claim 1 adjusts circuit, which is characterized in that the secondary load detection module includes
The input terminal of comparing unit, the comparing unit is electrically connected with reference voltage end, load connecting pin, the output of the comparing unit
End is electrically connected with sub-adjusting module, and the comparing unit is used to be exported according to load connection to the sub-adjusting module
Corresponding feedback voltage.
3. constant current output according to claim 2 adjusts circuit, which is characterized in that the comparing unit includes multiple comparisons
Device, the multiple comparator is in parallel, and the non-inverting input terminal of each comparator is set as predetermined reference voltage, inverting input terminal
Be electrically connected with load connecting pin, the inverting input terminal with load the indirect diode of connecting pin to ground terminal；When there is load to connect
Fashionable, the output end of the comparator exports low level.
4. constant current output according to claim 1 adjusts circuit, which is characterized in that the sub-adjusting module includes successively
Voltage input interface, dimming control unit, the opto-coupled feedback unit of electrical connection, the voltage input interface is for inputting light modulation letter
Number voltage, the dimming control unit is used for according to the corresponding pwm signal of voltage output of the dim signal, and passes through institute
It states opto-coupled feedback unit and feeds back to the primary adjustment module.
5. constant current output according to claim 4 adjusts circuit, which is characterized in that the dimming control unit includes light modulation
Chip is controlled, the brightness adjustment control chip includes light modulation pin and PWM output pin, and the light modulation pin is for inputting light modulation letter
Number, the PWM output pin is used for output pwm signal.
6. constant current output according to claim 4 or 5 adjusts circuit, which is characterized in that the voltage model of the dim signal
It encloses for 0~10V.
7. constant current output according to claim 1 adjusts circuit, which is characterized in that the primary adjustment module includes successively
Main control unit, switch unit and the converting unit of electric connection, the main control unit is for receiving the pwm signal, according to institute
The duty ratio for stating pwm signal exports the output electric current of corresponding ratio, and is adjusted by the switch unit and converting unit by institute
It states output electric current and is applied to load.
8. constant current output according to claim 7 adjusts circuit, which is characterized in that the main control unit includes primary side single-stage
Power factor correction chip.
9. constant current output according to claim 1 adjusts circuit, which is characterized in that the load includes LED light.
10. constant current output according to claim 9 adjusts circuit, which is characterized in that the load includes 4 paths of LEDs lamps.
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| CN201910307592.4A CN109982485A (en) | 2019-04-16 | 2019-04-16 | Constant current output adjusts circuit |
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| CN201910307592.4A CN109982485A (en) | 2019-04-16 | 2019-04-16 | Constant current output adjusts circuit |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101039070A (en) * | 2006-03-15 | 2007-09-19 | 麦奎尔有限公司 | Switching voltage regulator with low current trickle mode |
| CN201365198Y (en) * | 2009-01-22 | 2009-12-16 | 皇源电子(深圳)有限公司 | High-efficient series-parallel LED power supply |
| CN101951708A (en) * | 2009-07-10 | 2011-01-19 | 深圳比亚迪微电子有限公司 | Light modulating control circuit, chip and method |
| CN201846499U (en) * | 2010-06-30 | 2011-05-25 | 深圳市浩城微电子科技有限公司 | Output conversion circuit for LED drive power supply |
| CN102186289A (en) * | 2011-04-18 | 2011-09-14 | 广东科立盈光电技术有限公司 | LED (Light Emitting Diode) driving power supply |
| CN104066244A (en) * | 2014-06-16 | 2014-09-24 | 上海大学 | Universal LED simulation dimming circuit |
| KR20160133877A (en) * | 2015-05-13 | 2016-11-23 | 주식회사 실리콘웍스 | Lamp apparatus and driving circuit for the lamp apparatus |
| CN107659150A (en) * | 2017-01-19 | 2018-02-02 | 深圳市华芯邦科技有限公司 | The direct current energy transform method and system that DCDC modules automatically switch |
| CN211019357U (en) * | 2019-04-16 | 2020-07-14 | 深圳市豪恩智能物联股份有限公司 | Constant current output regulating circuit |
-
2019
- 2019-04-16 CN CN201910307592.4A patent/CN109982485A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101039070A (en) * | 2006-03-15 | 2007-09-19 | 麦奎尔有限公司 | Switching voltage regulator with low current trickle mode |
| CN201365198Y (en) * | 2009-01-22 | 2009-12-16 | 皇源电子(深圳)有限公司 | High-efficient series-parallel LED power supply |
| CN101951708A (en) * | 2009-07-10 | 2011-01-19 | 深圳比亚迪微电子有限公司 | Light modulating control circuit, chip and method |
| CN201846499U (en) * | 2010-06-30 | 2011-05-25 | 深圳市浩城微电子科技有限公司 | Output conversion circuit for LED drive power supply |
| CN102186289A (en) * | 2011-04-18 | 2011-09-14 | 广东科立盈光电技术有限公司 | LED (Light Emitting Diode) driving power supply |
| CN104066244A (en) * | 2014-06-16 | 2014-09-24 | 上海大学 | Universal LED simulation dimming circuit |
| KR20160133877A (en) * | 2015-05-13 | 2016-11-23 | 주식회사 실리콘웍스 | Lamp apparatus and driving circuit for the lamp apparatus |
| CN107659150A (en) * | 2017-01-19 | 2018-02-02 | 深圳市华芯邦科技有限公司 | The direct current energy transform method and system that DCDC modules automatically switch |
| CN211019357U (en) * | 2019-04-16 | 2020-07-14 | 深圳市豪恩智能物联股份有限公司 | Constant current output regulating circuit |
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