CN106793279B - A kind of adjustable constant current output power module and implementation method - Google Patents
A kind of adjustable constant current output power module and implementation method Download PDFInfo
- Publication number
- CN106793279B CN106793279B CN201611144166.6A CN201611144166A CN106793279B CN 106793279 B CN106793279 B CN 106793279B CN 201611144166 A CN201611144166 A CN 201611144166A CN 106793279 B CN106793279 B CN 106793279B
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- resistance
- output
- control line
- operational amplifier
- chip microcontroller
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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]
- H05B45/40—Details of LED load circuits
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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
The present invention relates to power supply outputs to control, and it discloses a kind of adjustable constant current output power modules, solve the problems, such as constant-current supply poor compatibility in traditional technology.The constant current output power module includes: resistance R1-R6, capacitor C1-C4, diode D1, zener diode ZD1, triode Q1, single-chip microcontroller U1, operational amplifier U2 and the first, second control line；The base stage of triode Q1 is grounded by ZD1 connection supply voltage, and by R2；Its emitter connects supply voltage by R1；Its collector is grounded by R3 and R4；C1 and C2 are connected in parallel between the both ends of R3 and ground；First control line connects R3 by D1；Second control line connects one end of R4, the input terminal of the other end connection single-chip microcontroller U1 of R4；The output end of U1 is grounded by R5 and R6；C3 is connected between the output end and ground of single-chip microcontroller U1；The C4 is in parallel with R6 and connect an input terminal of operational amplifier U2, another input terminal sampled output current of operational amplifier U2；The output end of U2 is the output of power module.
Description
Technical field
The present invention relates to power supply outputs to control, and in particular to a kind of adjustable constant current output power module and implementation method.
Background technique
Currently, LED streetlamp power source is generally constant current or constant voltage output in the market, there is particular requirement to the load of driving, when
When load changes, need to redesign power supply, so that cost is increased, thus the power compatibility in traditional technology is poor.
Summary of the invention
The technical problems to be solved by the present invention are: propose a kind of adjustable constant current output power module and implementation method,
Solve the problems, such as constant-current supply poor compatibility in traditional technology.
The technical solution adopted by the present invention to solve the technical problems is:
A kind of adjustable constant current output power module, comprising: the first to the 6th resistance, first to fourth capacitor, diode,
Zener diode, triode, single-chip microcontroller, operational amplifier and the first, second control line；
The base stage of the triode connects supply voltage by zener diode, and is grounded by second resistance；It emits
Pole connects supply voltage by first resistor；Its collector passes through 3rd resistor and the 4th resistance eutral grounding；The first capacitor with
Second capacitor is connected in parallel between the both ends of 3rd resistor and ground；First control line connects 3rd resistor by diode；Institute
One end that the second control line connects the 4th resistance is stated, the other end of the 4th resistance connects the input terminal of the single-chip microcontroller；The list
The output end of piece machine passes through the 5th resistance and the 6th resistance eutral grounding；Output end and ground of the third capacitance connection in single-chip microcontroller
Between；4th capacitor is with the 6th resistor coupled in parallel and connect an input terminal of operational amplifier, the operational amplifier it is another
One input terminal sampled output current；The output end of the operational amplifier connects the control of device for power switching by feedback line
Master integrated circuit processed.
As advanced optimizing, the output end of the operational amplifier is all the way or multiple-channel output.
As advanced optimizing, first, second control line is for being arranged maximum output current and carrying out brightness adjustment control.
In addition, being based on above-mentioned power module, another object of the present invention, which also resides in, proposes that a kind of adjustable constant current output is realized
Method comprising:
The control terminal for first passing through the first control line and the second control line accesses some voltage or resistance, will be corresponding at this time defeated
Electric current is as maximum output current out, then passes through the voltage of the first control line and the other analog values of control termination of the second control line
Or resistance dims to realize.
The beneficial effects of the present invention are: the constant current output power module based on design, can be set the output electric current of power supply,
And 0-10V and resistance light modulation may be implemented, user can be arranged different driving currents, make the simultaneous of power supply according to load needs
Capacitive is strong, and application range is wider.
Detailed description of the invention
Fig. 1 is the adjustable constant current output power module structure schematic diagram in embodiment.
Specific embodiment
The present invention is directed to propose a kind of adjustable constant current output power module and implementation method, solve constant current in traditional technology
The problem of power compatibility difference.The solution of the present invention is further described with reference to the accompanying drawings and embodiments:
As shown in Figure 1, the adjustable constant current output power module in the present embodiment includes: the first to the 6th resistance, first
To the 4th capacitor, diode, zener diode, triode, single-chip microcontroller, operational amplifier and the first, second control line；
The base stage of the triode Q1 is grounded by zener diode ZD1 connection supply voltage by second resistance R2；
Its emitter passes through first resistor R1 connection supply voltage；Its collector is grounded by 3rd resistor R3 and the 4th resistance R4；Institute
It states first capacitor C1 and the second capacitor C2 is connected in parallel between the both ends and ground of 3rd resistor R3；First control line passes through two poles
Pipe D1 connection 3rd resistor R3；Second control line connects one end of the 4th resistance R4, the other end connection of the 4th resistance R4
The input terminal of the single-chip microcontroller U1；The output end of the single-chip microcontroller U1 is grounded by the 5th resistance R5 and the 6th resistance R6；It is described
Third capacitor R3 is connected between the output end and ground of single-chip microcontroller U1；The 4th capacitor C4 is in parallel with the 6th resistance R6 and connect
An input terminal of operational amplifier U2, another input terminal sampled output current of the operational amplifier U2；The operation
The output end of amplifier U2 connects the control master integrated circuit of device for power switching by feedback line.
The working principle of above-mentioned constant current output power module are as follows: Q1, R1, R2 and ZD1 form constant-current source；C1, C2 play filtering
Effect, D1 prevent reversed I3 electric current.I2 flows through R3 and R4 to ground, and A point voltage changes with the curent change for flowing through R4,
When RED and GREEN hanging, I1=I2, A point voltage are equal to R4*I2,；When the indirect voltage or resistance (connecting resistance of RED and GREEN
When, there is I3 to flow through on resistance, resistance both ends have voltage to be formed at this time, are equivalent with voltage is directly connect) when, I3 is with access
Voltage or resistance value are different, and size is also different, at this point, I2=I1-I3, I2 change with the difference of I3, so that A point voltage is sent out
Changing.
The effect of single-chip microcontroller U1 is the voltage for detecting A point, the different square-wave signal of output duty cycle, when the voltage of A point is sent out
When changing, the duty cycle square wave of output also changes.
C3, C4 are played a filtering role, and R5 and R6 divide the output signal of single-chip microcontroller.When the square wave of single-chip microcontroller U1 output
When duty ratio changes, the voltage of R6 can also change.
The effect of operational amplifier U2 is the voltage for acquiring R6, to output current sampling, and is compared, output signal,
By feedback line, the control master integrated circuit of device for power switching is delivered a signal to, so that system steady operation.
In conclusion voltage or resistance can be connect by RED and GREEN, the voltage change of operational amplifier IN- foot is realized,
It by circuit sampled signal IN+, is compared with IN-, to realize the setting of output electric current.Practical application is exemplified below:
It is " D " when defining single-chip microcontroller output signal duty ratio 100%.Each dotted state can be arranged according to resistance, capacitor value,
It is as shown in the table:
| Between RED and GREEN | A point voltage | Single-chip microcontroller output duty cycle | Correspondence system exports electric current |
| Vacantly | 3.3V | D | 2A |
| 20V | 3.1V | D*80% | 1.6A |
| 18V | 2.9V | D*70% | 1.4A |
| 16V | 2.7V | D*60% | 1.2A |
| … | … | … | … |
| 10V | 2.2V | D*40% | 0.8A |
| 5V | 1.1V | D*20% | 0.4A |
| … | … | … | … |
As shown in above-mentioned case, the adjusting of output electric current can be realized by foregoing circuit, meanwhile, cooperated by software,
RED and GREEN can be first passed through to terminate into some voltage or resistance, will at this time corresponding output electric current as maximum output electricity
Stream, then voltage or the resistance of other analog values are terminated to realize light modulation by RED and GREEN.Such as: when RED and GREEN is terminated
When entering 16V voltage, single-chip microcontroller sets corresponding 1.2A in the maximum output end electric current of default.When RED and GREEN are terminated into 0-
When the voltage of 10V or the resistance of corresponding resistance value, light modulation is realized.
Claims (2)
1. a kind of adjustable constant current output power module characterized by comprising the first to the 6th resistance, first to fourth electricity
Appearance, diode, zener diode, triode, single-chip microcontroller, operational amplifier and the first, second control line；
The base stage of the triode connects supply voltage by zener diode, and is grounded by second resistance；Its emitter is logical
Cross first resistor connection supply voltage；Its collector passes through 3rd resistor and the 4th resistance eutral grounding；The first capacitor and second
Capacitor is connected in parallel between the both ends of 3rd resistor and ground；First control line connects 3rd resistor by diode；Described
Two control lines connect one end of the 4th resistance, and the other end of the 4th resistance connects the input terminal of the single-chip microcontroller；The single-chip microcontroller
Output end pass through the 5th resistance and the 6th resistance eutral grounding；The third capacitance connection is between the output end and ground of single-chip microcontroller；
4th capacitor is with the 6th resistor coupled in parallel and connect an input terminal of operational amplifier, the operational amplifier another
Input terminal sampled output current；The output end of the operational amplifier connects the control master of device for power switching by feedback line
Integrated circuit；
First control line, the second control line are for being arranged maximum output current and carrying out brightness adjustment control:
The control terminal for first passing through the first control line and the second control line accesses some voltage or resistance, will the electricity of corresponding output at this time
Stream is used as maximum output current, then the voltage or electricity of other analog values are terminated by the control of the first control line and the second control line
Resistance dims to realize.
2. a kind of adjustable constant current output power module as described in claim 1, which is characterized in that the operational amplifier
Output end is all the way or multiple-channel output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201611144166.6A CN106793279B (en) | 2016-12-13 | 2016-12-13 | A kind of adjustable constant current output power module and implementation method |
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| CN201611144166.6A CN106793279B (en) | 2016-12-13 | 2016-12-13 | A kind of adjustable constant current output power module and implementation method |
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| CN106793279A CN106793279A (en) | 2017-05-31 |
| CN106793279B true CN106793279B (en) | 2019-09-13 |
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| CN107291137B (en) * | 2017-07-25 | 2018-11-27 | 西安电子科技大学 | A kind of adjustable outputting reference source circuit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201097468Y (en) * | 2007-05-09 | 2008-08-06 | 李广 | LED light source circuit |
| CN203942687U (en) * | 2014-07-03 | 2014-11-12 | 苏州鸿益丰光电有限公司 | A kind of isolated form constant-current dimming circuit |
| CN104602418A (en) * | 2015-02-02 | 2015-05-06 | 常州丰泰机电工程有限公司 | Adjustable constant flow source driving circuit for LED |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203554760U (en) * | 2013-11-05 | 2014-04-16 | 青岛伏科太阳能有限公司 | Bimodal light modulation circuit and illumination equipment |
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2016
- 2016-12-13 CN CN201611144166.6A patent/CN106793279B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201097468Y (en) * | 2007-05-09 | 2008-08-06 | 李广 | LED light source circuit |
| CN203942687U (en) * | 2014-07-03 | 2014-11-12 | 苏州鸿益丰光电有限公司 | A kind of isolated form constant-current dimming circuit |
| CN104602418A (en) * | 2015-02-02 | 2015-05-06 | 常州丰泰机电工程有限公司 | Adjustable constant flow source driving circuit for LED |
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Effective date of registration: 20190719 Address after: 621000 Exit Processing Zone 201 Factory Building, 261 Feiyun Avenue East Section, Mianyang High-tech Zone, Sichuan Province Applicant after: Sichuan Hongrui Electrical Co., Ltd. Address before: County 622651 Sichuan city of Mianyang Province Hua Gai Zhen Luo Sheng Jie Sichuan Changhong Electronics Co., Ltd. Applicant before: SICHUAN CHANGHONG ELECTRONIC PARTS CO., LTD. |
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