CN106793279A - 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
- CN106793279A CN106793279A CN201611144166.6A CN201611144166A CN106793279A CN 106793279 A CN106793279 A CN 106793279A CN 201611144166 A CN201611144166 A CN 201611144166A CN 106793279 A CN106793279 A CN 106793279A
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- resistance
- output
- control line
- voltage
- power module
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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
-
- 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 output control, it discloses a kind of adjustable constant current output power module, constant-current supply poor compatibility in conventional art is solved the problems, such as.The constant current output power module includes：Resistance R1 R6, electric capacity C1 C4, diode D1, voltage-regulator diode ZD1, triode Q1, single-chip microcomputer U1, operational amplifier U2 and first, second control line；The base stage of triode Q1 connects supply voltage by ZD1, and is grounded by R2；Its emitter stage connects supply voltage by R1；Its colelctor electrode is grounded by R3 and R4；C1 and C2 are connected in parallel between the two ends of R3 and ground；First control line connects R3 by D1；Second control line connects one end of R4, the input of the other end connection single-chip microcomputer U1 of R4；The output end of U1 is grounded by R5 and R6；C3 is connected between the output end of single-chip microcomputer U1 and ground；One input of the C4 simultaneously concatenation operation amplifier U2s in parallel with R6, another input 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 output control, and in particular to a kind of adjustable constant current output power module and implementation method.
Background technology
At present, in the market LED streetlamp power source is generally constant current or constant pressure output, and particular requirement is loaded with to what is driven, when
It is poor so as to increased the power compatibility in cost, thus conventional art, it is necessary to redesign power supply when load changes.
The content of the invention
The technical problems to be solved by the invention are：A kind of adjustable constant current output power module and implementation method are proposed,
Solve the problems, such as constant-current supply poor compatibility in conventional art.
The technical solution adopted for the present invention to solve the technical problems is：
A kind of adjustable constant current output power module, including：First to the 6th resistance, first to fourth electric capacity, diode,
Voltage-regulator diode, triode, single-chip microcomputer, operational amplifier and first, second control line；
The base stage of the triode connects supply voltage by voltage-regulator diode, and is grounded by second resistance；Its transmitting
Pole connects supply voltage by first resistor；Its colelctor electrode passes through 3rd resistor and the 4th resistance eutral grounding；First electric capacity with
Second electric capacity is connected in parallel between the two 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 of the single-chip microcomputer；The list
The output end of piece machine passes through the 5th resistance and the 6th resistance eutral grounding；Output end and ground of 3rd capacitance connection in single-chip microcomputer
Between；One input of the 4th electric capacity and the 6th resistor coupled in parallel and concatenation operation amplifier, the operational amplifier it is another
One input 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.
Used as further optimization, the output end of the operational amplifier is for all the way or multiple-channel output.
Used as further optimization, first, second control line is used to set maximum output current and carries out brightness adjustment control.
Additionally, being based on above-mentioned power module, another object of the present invention also resides in a kind of adjustable constant current output of proposition and realizes
Method, it includes：
The control end for first passing through the first control line and the second control line accesses certain voltage or resistance, will be now corresponding defeated
Go out electric current as maximum output current, then by the first control line and the voltage for controlling other analog values of termination of the second control line
Or resistance come realize light modulation.
The beneficial effects of the invention are as follows：Based on the constant current output power module of design, the output current of power supply can be set,
And 0-10V and resistance light modulation can be realized, user can set different driving currents, make the simultaneous of power supply according to load needs
Capacitive is strong, and range of application is wider.
Brief description of the drawings
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 conventional art
The problem of power compatibility difference.Below in conjunction with the accompanying drawings and embodiment the solution of the present invention is further described：
As shown in figure 1, the adjustable constant current output power module in the present embodiment includes：First to the 6th resistance, first
To the 4th electric capacity, diode, voltage-regulator diode, triode, single-chip microcomputer, operational amplifier and first, second control line；
The base stage of the triode Q1 connects supply voltage by voltage-regulator diode ZD1, and is grounded by second resistance R2；
Its emitter stage connects supply voltage by first resistor R1；Its colelctor electrode is grounded by 3rd resistor R3 and the 4th resistance R4；Institute
State the first electric capacity C1 and the second electric capacity C2 is connected in parallel between the two ends of 3rd resistor R3 and ground；First control line passes through two poles
Pipe D1 connection 3rd resistors R3；Second control line connects one end of the 4th resistance R4, the other end connection of the 4th resistance R4
The input of the single-chip microcomputer U1；The output end of the single-chip microcomputer U1 is grounded by the 5th resistance R5 and the 6th resistance R6；It is described
3rd electric capacity R3 is connected between the output end of single-chip microcomputer U1 and ground；The 4th electric capacity C4 is in parallel with the 6th resistance R6 and is connected
One input of operational amplifier U2, another input sampled output current of the operational amplifier U2；The computing
The output end of amplifier U2 connects the control master integrated circuit of device for power switching by feedback line.
The operation principle of above-mentioned constant current output power module is：Q1, R1, R2 and ZD1 constitute constant-current source；C1, C2 play filtering
Effect, D1 prevents reverse I3 electric currents.I2 flows through R3 and R4 to ground, and A point voltages change with the curent change of R4 is flowed through,
During 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, now resistance two ends have voltage to be formed, and are equivalent with voltage is directly connect) when, I3 is with access
Voltage or resistance value are different, and size is also different, and now, I2=I1-I3, I2 change with the difference of I3 so that A points voltage is sent out
Changing.
The effect of single-chip microcomputer U1 is the voltage for detecting A points, the different square-wave signal of output duty cycle, when the voltage of A points is sent out
During changing, the duty cycle square wave of output also changes.
C3, C4 strobe, and R5 and R6 carries out partial pressure to the output signal of single-chip microcomputer.When the square wave of single-chip microcomputer U1 outputs
When dutycycle changes, the voltage of R6 can also change.
The effect of operational amplifier U2 is to gather the voltage of R6, and output current is sampled, 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 sum, voltage or resistance can be connect by RED and GREEN, realizes the voltage change of operational amplifier IN- pin,
By circuit sampled signal IN+, it is compared to realize the setting of output current with IN-.Practical application is exemplified below：
It is " D " when defining single-chip microcomputer output signal dutycycle 100%.Each dotted state can be set according to resistance, electric capacity value,
It is as shown in the table：
| Between RED and GREEN | A point voltages | Single-chip microcomputer output duty cycle | Correspondence system output 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 regulation of output current can be realized by foregoing circuit, meanwhile, coordinated by software,
RED and GREEN can be first passed through to terminate into certain voltage or resistance, will now corresponding output current as maximum output electricity
Stream, then the voltage or resistance of other analog values terminated by RED and GREEN realize light modulation.For example：When RED and GREEN is terminated
When entering 16V voltages, corresponding 1.2A is set to single-chip microcomputer the maximum output end electric current of acquiescence.When RED and GREEN are terminated into 0-
During the resistance of the voltage of 10V or corresponding resistance, light modulation is realized.
Claims (4)
1. a kind of adjustable constant current output power module, it is characterised in that including：First to the 6th resistance, first to fourth electricity
Appearance, diode, voltage-regulator diode, triode, single-chip microcomputer, operational amplifier and first, second control line；
The base stage of the triode connects supply voltage by voltage-regulator diode, and is grounded by second resistance；Its emitter stage leads to
Cross first resistor connection supply voltage；Its colelctor electrode passes through 3rd resistor and the 4th resistance eutral grounding；First electric capacity and second
Electric capacity is connected in parallel between the two 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 of the single-chip microcomputer；The single-chip microcomputer
Output end pass through the 5th resistance and the 6th resistance eutral grounding；3rd capacitance connection is between the output end and ground of single-chip microcomputer；
One input of the 4th electric capacity and the 6th resistor coupled in parallel and concatenation operation amplifier, the operational amplifier another
Input sampled output current；The output end of the operational amplifier connects the control master of device for power switching by feedback line
Integrated circuit.
2. a kind of adjustable constant current output power module as claimed in claim 1, it is characterised in that the operational amplifier
Output end is for all the way or multiple-channel output.
3. a kind of adjustable constant current output power module as claimed in claim 1, it is characterised in that first, second control
Line processed is used to set maximum output current and carries out brightness adjustment control.
4. a kind of adjustable constant current output implementation method, it is characterised in that including：
The control end for first passing through the first control line and the second control line accesses certain voltage or resistance, now corresponding will export electricity
Flow as maximum output current, then by the first control line and the voltage or electricity that control other analog values of termination of the second control line
Hinder to realize light modulation.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| Publication Number | Publication Date |
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| CN106793279A true CN106793279A (en) | 2017-05-31 |
| CN106793279B CN106793279B (en) | 2019-09-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107291137A (en) * | 2017-07-25 | 2017-10-24 | 西安电子科技大学 | A kind of adjustable output reference source circuit |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201097468Y (en) * | 2007-05-09 | 2008-08-06 | 李广 | LED light source circuit |
| 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 |
| 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 |
-
2016
- 2016-12-13 CN CN201611144166.6A patent/CN106793279B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201097468Y (en) * | 2007-05-09 | 2008-08-06 | 李广 | LED light source circuit |
| 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 |
| 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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107291137A (en) * | 2017-07-25 | 2017-10-24 | 西安电子科技大学 | A kind of adjustable output reference source circuit |
| CN107291137B (en) * | 2017-07-25 | 2018-11-27 | 西安电子科技大学 | A kind of adjustable outputting reference source circuit |
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| Publication number | Publication date |
|---|---|
| CN106793279B (en) | 2019-09-13 |
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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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