CN103117658B - A kind of method of Serial Control voltage fine power supply and circuit - Google Patents
A kind of method of Serial Control voltage fine power supply and circuit Download PDFInfo
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- CN103117658B CN103117658B CN201310026447.1A CN201310026447A CN103117658B CN 103117658 B CN103117658 B CN 103117658B CN 201310026447 A CN201310026447 A CN 201310026447A CN 103117658 B CN103117658 B CN 103117658B
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- power supply
- divider resistance
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Abstract
The present invention relates to a kind of method of Serial Control voltage fine power supply, it is characterized in that: be applicable to Switching Power Supply, the method provides a displacement latch, serial transmit control signal is utilized to regulate a plurality of divider resistance in the access resistance of this switched power output, to regulate the output voltage of this Switching Power Supply to control this displacement latch.The inventive method and circuit adopt succinct lower cost solution, utilize displacement latch to realize serial signal and regulate switch power source output voltage, have the features such as degree of regulation is high, output voltage stabilization.
Description
Technical field
The present invention relates to power technique fields, particularly a kind of method of Serial Control voltage fine power supply and circuit.
Background technology
Existing Switching Power Supply due to its stability high, and circuit structure is simply widely used in all kinds of electric equipment, wherein the Switching Power Supply of multichannel adjustable output voltage is all generally realize by arranging multiple voltage regulating module at power output end or increasing tap at switching mode power supply transformer.Not only cost height circuit structure is complicated for it, and voltage control precision is forbidden.
In addition, in LED lamp, namely LED drive circuit is the Switching Power Supply of an output constant current, and it is with an automatic light meter that existing circuit often adopts controllable silicon dimmer to realize, and it is poor stability not only, and do not possess versatility, and design cost is high.
Summary of the invention
In view of this, the object of this invention is to provide a kind of method utilizing serial transmit control signal to carry out by-pass cock electric power output voltage.
The method adopts following scheme to realize: a kind of method of Serial Control voltage fine power supply, it is characterized in that: be applicable to Switching Power Supply, the method provides a displacement latch, serial transmit control signal is utilized to regulate a plurality of divider resistance in the access resistance of this switched power output, to regulate the output voltage of this Switching Power Supply to control this displacement latch.
In an embodiment of the present invention, described displacement latch is also provided with ratio step-up/step-down circuit, in order to realize output voltage by rising than row or falling.
In an embodiment of the present invention, described displacement latch is 8 bit shift latchs.
In an embodiment of the present invention, described divider resistance is 8, is respectively 1/2 in low level to high-value resistor ratio
7, 1/2
6, 1/2
5, 1/2
4, 1/2
3, 1/2
2, 1/2,1 times.
In an embodiment of the present invention, described Switching Power Supply is a LED pipe driving power.
Another object of the present invention is to provide the circuit that realizes said method.
This circuit comprises a Switching Power Supply, characterized by further comprising:
One displacement latch, the feeder ear of this displacement latch is connected with the output of described Switching Power Supply;
A plurality of divider resistance, one end of this plurality of resistance is connected to output corresponding to latch separately, and the other end is connected to the output of described Switching Power Supply and the Voltage Feedback input of this Switching Power Supply;
One basic divider resistance R1, one end of this basic divider resistance R1 is connected with the output of described Switching Power Supply;
One end of one basic divider resistance R2, this basic divider resistance R2 and the other end of described basic divider resistance R1 are connected to the Voltage Feedback input of described Switching Power Supply, the other end ground connection of described basic divider resistance R2; And
One control data line and clock line, controls described displacement latch in order to serial transmit control signal, regulates described a plurality of divider resistance in the access resistance of this switched power output.
In an embodiment of the present invention, also comprise a ratio step-up/step-down circuit, this ratio step-up/step-down circuit is connected between described switched power output and displacement latch feeder ear, in order to realize output voltage by rising than row or falling.
In an embodiment of the present invention, described displacement latch is 8 bit shift latchs.
In an embodiment of the present invention, described divider resistance is 8, is respectively 1/2 in low level to high-value resistor ratio
7, 1/2
6, 1/2
5, 1/2
4, 1/2
3, 1/2
2, 1/2,1 times.
In an embodiment of the present invention, described Switching Power Supply is a LED pipe driving power.
The inventive method and circuit adopt succinct lower cost solution, utilize displacement latch to realize serial signal and regulate switch power source output voltage, have the features such as degree of regulation is high, output voltage stabilization.
Accompanying drawing explanation
Fig. 1 is the circuit catenation principle schematic diagram of the embodiment of the present invention.
Fig. 2 is the circuit catenation principle schematic diagram of another embodiment of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention will be further described.
The embodiment of the present invention provides a kind of method of Serial Control voltage fine power supply, it is characterized in that: be applicable to Switching Power Supply, the method provides a displacement latch, serial transmit control signal is utilized to regulate a plurality of divider resistance in the access resistance of this switched power output, to regulate the output voltage of this Switching Power Supply to control this displacement latch.Described displacement latch is also provided with ratio step-up/step-down circuit, in order to realize output voltage by rising than row or falling.
In an embodiment of the present invention, described displacement latch is 8 bit shift latchs.When this displacement latch is 8, described divider resistance is 8, is respectively 1/2 in low level to high-value resistor ratio
7, 1/2
6, 1/2
5, 1/2
4, 1/2
3, 1/2
2, 1/2,1 times.
Concrete, refer to Fig. 1, Fig. 1 is the circuit catenation principle schematic diagram of the present embodiment, and in figure, this circuit comprises a Switching Power Supply, characterized by further comprising:
One displacement latch, the feeder ear of this displacement latch is connected with the output of described Switching Power Supply;
A plurality of divider resistance 4, one end of this plurality of resistance is connected to output corresponding to latch 3 separately, and the other end is connected to the output of described Switching Power Supply and the Voltage Feedback input of this Switching Power Supply;
One basic divider resistance R1, one end of this basic divider resistance R1 is connected with the output of described Switching Power Supply;
One end of one basic divider resistance R2, this basic divider resistance R2 and the other end of described basic divider resistance R1 are connected to the Voltage Feedback input of described Switching Power Supply, the other end ground connection of described basic divider resistance R2; And
One control data line 1 and clock line 2, control described displacement latch in order to serial transmit control signal, regulates described a plurality of divider resistance in the access resistance of this switched power output.
Refer to Fig. 2, the present embodiment is by two-wire serial signal, when data wire 1 latches data enters to be shifted latch by clock line 2 rising edge (or trailing edge), displacement latch output pin 3 exports high level respectively or low level accesses Switching Power Supply major loop regulation output voltage through divider resistance 4.Preferably, in figure resistance R1, R2 to be basic divider resistance control as voltage range under most limiting condition.Such as: if it is 8 that displacement latch exports, when output is 11111111 or 00000000, the ratio of this resistance R1, R2 and divider resistance will determine minimum output voltage and maximum output voltage.
In the present embodiment, divider resistance can distribute by power, such as, when being 8 bit shift latch, can be respectively 1/2 in low level to high-value resistor ratio
7, 1/2
6, 1/2
5, 1/2
4, 1/2
3, 1/2
2, 1/2,1 times.Such voltage control precision can reach 2
8be 256 resolution.Can use by multiple displacement latch serial connection as precision will be improved.
Circuit of the present invention is specially adapted to LED pipe driving power, because output voltage is between 3V ~ 5V, output voltage Vout directly can be connected on displacement latch VCC, in addition, preferably a ratio step-up/step-down circuit can also be set between described switched power output and displacement latch feeder ear, in order to realize output voltage by rising than row or falling; This to be adopted than row step-up/step-down circuit, output voltage to be risen or be down to 3V ~ 5V(displacement latch operating voltage by than arranging as output voltage <3V or >5V).
It is worth mentioning that, the method and circuit can be applicable to carry out regulable control to switch power source output voltage in various AC/DC or DC/DC circuit, particularly in LED constant current circuit as LED lamp tube voltage trim, can play optimize efficiency and different to different LED tube coupling pressure time Regulation Control.
The foregoing is only preferred embodiment of the present invention, all equalizations done according to the present patent application the scope of the claims change and modify, and all should belong to covering scope of the present invention.
Claims (3)
1. a circuit for Serial Control voltage fine power supply, comprises a Switching Power Supply, characterized by further comprising:
One displacement latch, the feeder ear of this displacement latch is connected with the output of described Switching Power Supply;
A plurality of divider resistance, one end of this plurality of divider resistance is connected to output corresponding to latch separately, and the other end is connected to the output of described Switching Power Supply and the Voltage Feedback input of this Switching Power Supply;
One basic divider resistance R1, one end of this basic divider resistance R1 is connected with the output of described Switching Power Supply;
One end of one basic divider resistance R2, this basic divider resistance R2 and the other end of described basic divider resistance R1 are connected to the Voltage Feedback input of described Switching Power Supply, the other end ground connection of described basic divider resistance R2; And
One control data line and clock line, controls described displacement latch in order to serial transmit control signal, regulates described a plurality of divider resistance in the access resistance of this switched power output;
Also comprise a ratio step-up/step-down circuit, this ratio step-up/step-down circuit is connected between described switched power output and displacement latch feeder ear, in order to realize output voltage by rising than row or falling;
Described Switching Power Supply is a LED pipe driving power.
2. the circuit of Serial Control voltage fine power supply according to claim 1, is characterized in that: described displacement latch is 8 bit shift latchs.
3. the circuit of Serial Control voltage fine power supply according to claim 2, is characterized in that: described divider resistance is 8, is respectively 1/2 in low level to high-value resistor ratio
7, 1/2
6, 1/2
5, 1/2
4, 1/2
3, 1/2
2, 1/2,1 times.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310026447.1A CN103117658B (en) | 2013-01-24 | 2013-01-24 | A kind of method of Serial Control voltage fine power supply and circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310026447.1A CN103117658B (en) | 2013-01-24 | 2013-01-24 | A kind of method of Serial Control voltage fine power supply and circuit |
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| CN103117658A CN103117658A (en) | 2013-05-22 |
| CN103117658B true CN103117658B (en) | 2015-10-28 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103702494B (en) * | 2014-01-09 | 2015-09-16 | 广德利德光电有限公司 | A kind of two pin RGB-LED control circuits |
| CN109728721A (en) * | 2017-10-27 | 2019-05-07 | 北京嘉楠捷思信息技术有限公司 | Output voltage adjustable switching power supply and power supply system |
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|---|---|---|---|---|
| CN201130907Y (en) * | 2007-11-20 | 2008-10-08 | 至宝电脑兴业股份有限公司 | Power supply booster start circuit |
| CN101795071A (en) * | 2009-12-28 | 2010-08-04 | 福建星网锐捷网络有限公司 | DC-DC power supply device, voltage regulation method and network equipment |
| CN101795062A (en) * | 2009-02-04 | 2010-08-04 | 恩益禧电子股份有限公司 | Booster circuit and display unit |
| CN102064704A (en) * | 2010-12-27 | 2011-05-18 | 东莞市奇立电源有限公司 | Single-path multiple-voltage output power supply control method and device |
| CN201985759U (en) * | 2011-02-28 | 2011-09-21 | 广州视源电子科技有限公司 | DCDC (direct current direct current) output circuit |
| CN203056972U (en) * | 2013-01-24 | 2013-07-10 | 福州欣联达电子科技有限公司 | Circuit of serial control voltage accurately-adjusted power supply |
-
2013
- 2013-01-24 CN CN201310026447.1A patent/CN103117658B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201130907Y (en) * | 2007-11-20 | 2008-10-08 | 至宝电脑兴业股份有限公司 | Power supply booster start circuit |
| CN101795062A (en) * | 2009-02-04 | 2010-08-04 | 恩益禧电子股份有限公司 | Booster circuit and display unit |
| CN101795071A (en) * | 2009-12-28 | 2010-08-04 | 福建星网锐捷网络有限公司 | DC-DC power supply device, voltage regulation method and network equipment |
| CN102064704A (en) * | 2010-12-27 | 2011-05-18 | 东莞市奇立电源有限公司 | Single-path multiple-voltage output power supply control method and device |
| CN201985759U (en) * | 2011-02-28 | 2011-09-21 | 广州视源电子科技有限公司 | DCDC (direct current direct current) output circuit |
| CN203056972U (en) * | 2013-01-24 | 2013-07-10 | 福州欣联达电子科技有限公司 | Circuit of serial control voltage accurately-adjusted power supply |
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| CN103117658A (en) | 2013-05-22 |
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