CN104076852A - Serial voltage stabilizing circuit for switching power supply - Google Patents
Serial voltage stabilizing circuit for switching power supply Download PDFInfo
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- CN104076852A CN104076852A CN201310102218.3A CN201310102218A CN104076852A CN 104076852 A CN104076852 A CN 104076852A CN 201310102218 A CN201310102218 A CN 201310102218A CN 104076852 A CN104076852 A CN 104076852A
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- power supply
- resistance
- switching power
- voltage
- voltage stabilizing
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Abstract
The invention provides a serial voltage stabilizing circuit for a switching power supply. The serial voltage stabilizing circuit for the switching power supply comprises a triode, a first resistor, a voltage stabilizing diode, a second resistor and a load. The collector electrode of the triode is coupled to the voltage input end of the serial voltage stabilizing circuit, the emitting electrode of the triode is coupled to one end of the load, the other end of the load is grounded, the base electrode of the triode is coupled to one end of the first resistor, the other end of the first resistor is coupled with the cathode of the voltage stabilizing diode, the anode of the voltage stabilizing diode is grounded, and the second resistor is coupled between the collector electrode and the base electrode of the triode. According to the serial voltage stabilizing circuit for the switching power supply, stability of low-voltage 2.5V working voltages is effectively achieved, and stability of the load is effectively guaranteed.
Description
Technical field
The present invention relates to mu balanced circuit field, particularly a kind of serial regulating circuit for Switching Power Supply.
Background technology
Having at present in the circuit of application of power, because power supply itself exists certain quality and life problems, after working long hours, output end power voltage can fluctuate, the work quality of the exhausted fixed load of size of output voltage stability bandwidth.
China Patent Publication No.: CN201754564 discloses a kind of mu balanced circuit, described mu balanced circuit is connected to a direct current rectification circuit, key is that described mu balanced circuit comprises a voltage regulation unit and a transistor, the collector C of the described transistor utmost point is connected with the positive pole of direct current rectification circuit by a resistance R 1, emitter E is connected with the negative pole of direct current rectification circuit, base stage B is by a resistance R 2 and the rear emitter E that connects of resistance R 3 series connection, the positive pole of voltage regulation unit is connected with the positive pole of direct current rectification circuit, the negative pole of voltage regulation unit is connected between resistance R 2 and resistance R 3.Described mu balanced circuit also comprises an electric capacity, and it is connected in the output terminal of direct current rectification circuit.Described resistance R 1 is wire resistor or other high-power resistances.Described voltage regulation unit is a voltage stabilizing diode.Adopt the present invention can make mu balanced circuit in the process of voltage stabilizing, unnecessary energy is transformed on resistance and be consumed, prevent that stabilivolt from burning because of lasting high temperature, stabilivolt as switching signal device, can not produce excessive high temperature.This main circuit will the base stage by triode connects a connection in series-parallel combinational circuit and realizes voltage stabilizing, and the components and parts of use are more, realize cost higher.
Summary of the invention
For defect of the prior art, the invention provides a kind of serial regulating circuit for Switching Power Supply, overcome the difficulty of prior art, in order to solve in the situation of electric power output voltage shakiness, how loaded work piece voltage is stablized, this circuit uses series connection method to make stable operating voltage.
According to an aspect of the present invention, provide a kind of serial regulating circuit for Switching Power Supply, comprise a triode, one first resistance, a voltage stabilizing diode, one second resistance and a load; The collector of described triode couples the voltage input end of serial regulating circuit, the emitter of described triode couples one end of load, the other end ground connection of described load, the base stage of described triode couples one end of described the first resistance, the other end of described the first resistance couples the negative electrode of described voltage stabilizing diode, the plus earth of described voltage stabilizing diode, couples one second resistance between the collector of described triode and base stage.
Preferably, described triode is negative-positive-negative transistor.
Preferably, described triode is 8050 type triodes.
Preferably, described voltage stabilizing diode is Schottky-barrier diode.
Preferably, described voltage stabilizing diode is LM336-2.5V type diode.
Preferably, the resistance of described the first resistance is 10 Ω.
Preferably, the resistance of described the second resistance is 220 Ω.
Preferably, the operating voltage of described serial regulating circuit is 2.5V.
Preferably, described load is a rheostat.
Preferably, in the time that the voltage of voltage input end raises, the voltage drop between described collector and emitter increases thereupon; In the time that the voltage of voltage input end reduces, the voltage drop between described collector and emitter reduces thereupon.
With China Patent Publication No.: compared with CN201754564, CN201754564 connects a string parallel combination circuit by the base stage of triode to realize voltage stabilizing; The application realizes by base stage direct series winding one resistance and a voltage stabilizing diode of triode.The application compared with CN201754564, both embodiment differences, components and parts used in this application still less, react rapider, holding circuit better.
Compared with prior art, owing to having used above technology, the serial regulating circuit for Switching Power Supply of the present invention has solved the stable problem of low-voltage 2.5V operating voltage effectively, has effectively ensured the stable of load.
Brief description of the drawings
By reading the detailed description of non-limiting example being done with reference to the following drawings, it is more obvious that other features, objects and advantages of the present invention will become:
Fig. 1 illustrates according to a specific embodiment of the present invention, the circuit diagram of the serial regulating circuit for Switching Power Supply of the present invention.
Reference numeral
1 triode
2 first resistance
3 voltage stabilizing diodes
4 second resistance
5 loads
V
iNvoltage input end
V
oUTvoltage output end
Embodiment
It will be appreciated by those skilled in the art that those skilled in the art can realize described variation example in conjunction with prior art and above-described embodiment, do not repeat them here.Such variation example does not affect flesh and blood of the present invention, does not repeat them here.
Fig. 1 illustrates according to a specific embodiment of the present invention, the circuit diagram of the serial regulating circuit for Switching Power Supply of the present invention.As shown in Figure 1, the invention provides a kind of serial regulating circuit for Switching Power Supply, comprise triode 1, one first resistance 2, one voltage stabilizing diode 3, one second resistance 4 and loads 5.The collector of triode 1 couples the voltage input end V of serial regulating circuit
iN, be also the output terminal of Switching Power Supply.The emitter of triode 1 couples one end of load 5, the other end ground connection of load 5.In one embodiment, load 5 is variable resistor.The base stage of triode 1 is through the first resistance 2 and voltage stabilizing diode 3 ground connection of series connection, and wherein, one end of the first resistance 2 couples the collector of triode 1, and the other end couples the negative electrode of voltage stabilizing diode 3, the plus earth of voltage stabilizing diode 3.Between the collector of triode 1 and base stage, couple one second resistance 4.The resistance of the first resistance 2 is 10 Ω.The resistance of the second resistance 4 is 220 Ω.Earth-free one end of voltage of load 5 is voltage output end V
oUT.
Certainly, the resistance of the resistance of the first resistance 2 and the second resistance 4 is not limited to above listed data.According to actual needs, within the adjustment resistance of the first resistance 2 and/or the resistance of the second resistance 4 drop on protection scope of the present invention equally.
Triode 1 is negative-positive-negative transistor.In the present embodiment, triode 1 is 8050 type triodes preferably.The electrical property of 8050 type triodes is as follows:
Maximum collector current (A): 0.5A.
Direct current gain: 10to60.
Power consumption: 625mW.
Maximum collector-emitter voltage (VCEO): 25.
Characteristic frequency: 150MHz.
Certainly, triode 1 is not limited in above listed triode, is replaced with the identical or similar triode of electric property, within dropping on protection scope of the present invention equally.
Voltage stabilizing diode 3 is Schottky-barrier diodes.Schottky-barrier diode SBD(Schottky Barrier Diode, is called for short schottky diode) be low-power consumption, large electric current, ultra-speed semiconductor device.Its reverse recovery time extremely short (may diminish to several nanoseconds), forward conduction voltage drop is 0.4V left and right only, and commutated current can reach several kiloamperes.These good characteristics are that fast recovery diode is incomparable.In, miniwatt Schottky barrier diodes adopts packing forms mostly.
In the present embodiment, voltage stabilizing diode 3 is LM336-2.5V type diode preferably.Certainly, voltage stabilizing diode 3 is not limited in above listed diode, is replaced with the identical or similar diode of electric property, within dropping on protection scope of the present invention equally.
The operating voltage of the serial regulating circuit for Switching Power Supply of the present invention is 2.5V.As voltage input end V
iNvoltage raise time, the voltage drop between collector and emitter increases thereupon.As voltage input end V
iNvoltage while reducing, the voltage drop between collector and emitter reduces thereupon.
Adopt the present invention can make mu balanced circuit in the process of voltage stabilizing, unnecessary energy is transformed on resistance and be consumed, prevent that voltage stabilizing diode 3 from burning because of lasting high temperature, 3 of voltage stabilizing diodes, as switching signal device, can not produce excessive high temperature.
The embodiment of the serial regulating circuit for Switching Power Supply of the present invention is as follows:
This circuit is depicted as serial regulating circuit, resistance 2 and voltage stabilizing diode 3(LM336-2.5V) form voltage stabilizing benchmark, voltage is 2.5V, in the time that the output terminal (input voltage shown in figure) of Switching Power Supply raises or reduces, 3 base voltages are managed in the adjustment of connecting with load 5, raise simultaneously or reduce through the second resistance 4, make the corresponding increase of its base current or reduce, the electric current that flows through collector and emitter also and then increases or reduces, and the voltage drop between collector and emitter also increases thereupon or reduces.Therefore the voltage stabilization of its emitter output is constant.
In summary, the serial regulating circuit for Switching Power Supply of the present invention has solved the stable problem of low-voltage 2.5V operating voltage effectively, has effectively ensured the stable of load.
Above specific embodiments of the invention are described.It will be appreciated that, the present invention is not limited to above-mentioned specific implementations, and those skilled in the art can make various distortion or amendment within the scope of the claims, and this does not affect flesh and blood of the present invention.
Claims (10)
1. for a serial regulating circuit for Switching Power Supply, it is characterized in that: comprise a triode (1), one first resistance (2), a voltage stabilizing diode (3), one second resistance (4) and a load (5);
The collector of described triode (1) couples the voltage input end (V of serial regulating circuit
iN), the emitter of described triode (1) couples one end of load (5), the other end ground connection of described load (5), the base stage of described triode (1) couples one end of described the first resistance (2), the other end of described the first resistance (2) couples the negative electrode of described voltage stabilizing diode, the plus earth of described voltage stabilizing diode, couples one second resistance (4) between the collector of described triode (1) and base stage.
2. the serial regulating circuit for Switching Power Supply as claimed in claim 1, is characterized in that: described triode (1) is negative-positive-negative transistor.
3. the serial regulating circuit for Switching Power Supply as claimed in claim 2, is characterized in that: described triode (1) is 8050 type triodes.
4. the serial regulating circuit for Switching Power Supply as claimed in claim 1, is characterized in that: described voltage stabilizing diode (3) is Schottky-barrier diode.
5. the serial regulating circuit for Switching Power Supply as claimed in claim 4, is characterized in that: described voltage stabilizing diode (3) is LM336-2.5V type diode.
6. the serial regulating circuit for Switching Power Supply as claimed in claim 1, is characterized in that: the resistance of described the first resistance (2) is 10 Ω.
7. the serial regulating circuit for Switching Power Supply as claimed in claim 1, is characterized in that: the resistance of described the second resistance (4) is 220 Ω.
8. the serial regulating circuit for Switching Power Supply as claimed in claim 1, is characterized in that: the operating voltage of described serial regulating circuit is 2.5V.
9. the serial regulating circuit for Switching Power Supply as claimed in claim 1, is characterized in that: described load (5) is a rheostat.
10. the serial regulating circuit for Switching Power Supply as claimed in claim 1, is characterized in that: as voltage input end (V
iN) voltage raise time, the voltage drop between described collector and emitter increases thereupon; As voltage input end (V
iN) voltage while reducing, the voltage drop between described collector and emitter reduces thereupon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310102218.3A CN104076852A (en) | 2013-03-27 | 2013-03-27 | Serial voltage stabilizing circuit for switching power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310102218.3A CN104076852A (en) | 2013-03-27 | 2013-03-27 | Serial voltage stabilizing circuit for switching power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104076852A true CN104076852A (en) | 2014-10-01 |
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ID=51598172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310102218.3A Pending CN104076852A (en) | 2013-03-27 | 2013-03-27 | Serial voltage stabilizing circuit for switching power supply |
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| Country | Link |
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| CN (1) | CN104076852A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6307354B1 (en) * | 1999-06-28 | 2001-10-23 | Hubbell Incorporated | Apparatus and method for limiting leakage to ground current while optimizing output of a power supply adaptable for use with a motion sensor switch |
| CN201044365Y (en) * | 2007-04-10 | 2008-04-02 | 陈振富 | Improved structure of equalization battery set |
| CN101868082A (en) * | 2009-04-15 | 2010-10-20 | 海洋王照明科技股份有限公司 | Lamp brightness control circuit |
| CN102036437A (en) * | 2009-09-30 | 2011-04-27 | 海洋王照明科技股份有限公司 | LED (light-emitting diode) dimming circuit |
| CN202550876U (en) * | 2011-12-30 | 2012-11-21 | 四川九洲电器集团有限责任公司 | PWM power supply circuit protective device |
| CN102810897A (en) * | 2011-05-30 | 2012-12-05 | 海洋王照明科技股份有限公司 | Charging circuit with short-circuit protection and charger |
-
2013
- 2013-03-27 CN CN201310102218.3A patent/CN104076852A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6307354B1 (en) * | 1999-06-28 | 2001-10-23 | Hubbell Incorporated | Apparatus and method for limiting leakage to ground current while optimizing output of a power supply adaptable for use with a motion sensor switch |
| CN201044365Y (en) * | 2007-04-10 | 2008-04-02 | 陈振富 | Improved structure of equalization battery set |
| CN101868082A (en) * | 2009-04-15 | 2010-10-20 | 海洋王照明科技股份有限公司 | Lamp brightness control circuit |
| CN102036437A (en) * | 2009-09-30 | 2011-04-27 | 海洋王照明科技股份有限公司 | LED (light-emitting diode) dimming circuit |
| CN102810897A (en) * | 2011-05-30 | 2012-12-05 | 海洋王照明科技股份有限公司 | Charging circuit with short-circuit protection and charger |
| CN202550876U (en) * | 2011-12-30 | 2012-11-21 | 四川九洲电器集团有限责任公司 | PWM power supply circuit protective device |
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Application publication date: 20141001 |