CN202617000U - Step-up and step-down type conversion circuit capable of identifying in-phase control voltage - Google Patents
Step-up and step-down type conversion circuit capable of identifying in-phase control voltage Download PDFInfo
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- CN202617000U CN202617000U CN 201220210076 CN201220210076U CN202617000U CN 202617000 U CN202617000 U CN 202617000U CN 201220210076 CN201220210076 CN 201220210076 CN 201220210076 U CN201220210076 U CN 201220210076U CN 202617000 U CN202617000 U CN 202617000U
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- power supply
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- 238000006243 chemical reaction Methods 0.000 title abstract description 11
- 239000003990 capacitor Substances 0.000 claims abstract description 19
- 230000000694 effects Effects 0.000 description 5
- 238000013507 mapping Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
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Abstract
The utility model relates to the technical field of DC-DC (direct current-direct current) power supplies of switching power supplies, and particularly to a step-up and step-down type conversion circuit capable of identifying an in-phase control voltage. The step-up and step-down type conversion circuit comprises an input power supply, a control power supply, a resistor, an inductor, a capacitor, triodes, and a rectifying diode. Compared with the prior art, in the step-up and step-down type conversion circuit disclosed by the utility model, the inductor L1 is moved to the collector of the triode from the emitter of the triode Q1, the rectifying diode D2 is added, a return-stroke switch-off circuit composed of the triode Q2 and the triode Q3 is added, the negative pole of the capacitor C1 is directly connected with the negative pole of the input power supply, on the basis of the traditional step-up and step-down type conversion circuit, so that the step-up and step-down type conversion circuit disclosed by the utility model can be used for realizing use for the in-phase control voltage of a common negative pole or a common positive pole while realizing the output of the traditional step-up and step-down type conversion circuit to be higher than or lower than an input voltage, thus avoiding the case that a control circuit is instable caused by voltage shift conversion for the control voltage.
Description
Technical field
The utility model relates to the DC-DC power supply technical field of Switching Power Supply, specifically a kind of step-down/up type translation circuit of discerning homophase control voltage.
Background technology
At present, three kinds of DC-DC circuit mapping modes are generally arranged: buck translation circuit, boost type translation circuit and step-down/up type translation circuit.
Referring to Fig. 1; In traditional step-down/up type translation circuit; The collector electrode of triode Q1 is connected with the anodal Input+ of input power supply; The emitter of triode Q1 divides two-way to be connected with the negative pole of inductance L 1 and rectifier diode D1 respectively, and the negative pole of capacitor C 1 is connected the back and is connected with the negative pole Output-of output with the positive pole of rectifier diode D1.
In three kinds of DC-DC circuit mapping modes, the step-down/up type translation circuit is that unique a kind of output voltage can be higher than input voltage, also can be lower than the mapping mode of input voltage.The step-down/up type translation circuit is widely used in battery power management and the conversion of micropower solar energy.
But compare with boost type translation circuit or buck translation circuit; The step-down/up type translation circuit has a significant disadvantages: because the buck translation circuit is quite imported power supply and reversed; When the voltage of input power supply Input is controlled under the voltage situation anodal altogether or negative pole altogether of power supply Control IC with input; The step-down/up type translation circuit need carry out the voltage shift conversion to control voltage, thereby causes control circuit unstable.
Therefore, a kind of step-down/up type translation circuit that can use common negative pole or anodal altogether homophase to control voltage signal of design is vital.
Summary of the invention
The purpose of the utility model is the deficiency that overcomes prior art, and a kind of step-down/up type translation circuit that can use common negative pole or anodal altogether control voltage signal is provided.
In order to achieve the above object; The utility model has designed a kind of step-down/up type translation circuit of discerning homophase control voltage; Comprise input power supply, control power supply, resistance, inductance, electric capacity, triode and rectifier diode; It is characterized in that: the emitter of triode Q1 is connected with the anodal Input+ of input power supply; The collector electrode of triode Q1 divides two-way to be connected with the negative pole of inductance L 1 and rectifier diode D1 respectively, and the negative pole of capacitor C 1 is connected the back and divides two-way to be connected with the negative pole Output-of output and the negative pole Input-of input power supply respectively with the positive pole of rectifier diode D1; The collector electrode of triode Q2 is connected with resistance R 1; The emitter of triode Q2 is connected with the negative pole Input-of input power supply; The base stage of triode Q2 is connected with resistance R 2; The other end of resistance R 2 divides two-way to be connected with resistance R 3 and control power supply Control IC respectively, and the other end of resistance R 3 is connected with the base stage of triode Q3, and the emitter of triode Q3 is connected with the negative pole Input-of input power supply; The collector electrode of triode Q3 divides two-way to be connected with the other end of inductance L 1 and the positive pole of rectifier diode D1 respectively, and the negative pole of rectifier diode D1 is connected the back and is connected with the anodal Output+ of output with the positive pole of capacitor C 1.
The utility model is compared with prior art; On the basis of traditional step-down/up type translation circuit; Inductance L 1 is moved on to the collector electrode of triode by the emitter of triode Q1; Increased a rectifier diode D2; Increased a flyback breaking circuit of being made up of triode Q2 and triode Q3, the negative pole of capacitor C 1 directly is connected with the negative pole of input power supply, thereby makes the utility model can realize that the output of traditional buck translation circuit is higher than input voltage and perhaps exports when being lower than input voltage; Also can realize using common negative pole or anodal altogether homophase control voltage signal, thereby avoid control voltage is carried out the voltage shift conversion and causes the unsettled situation of control circuit.
Description of drawings
Fig. 1 is the circuit diagram of prior art.
Fig. 2 is the circuit diagram of the utility model.
Fig. 3 is the Pspice simulated effect figure of the utility model.
Embodiment
Combine accompanying drawing that the utility model is done further describes at present.
Referring to Fig. 2; The utility model comprises input power supply, control power supply, resistance, inductance, electric capacity, triode and rectifier diode; It is characterized in that: the emitter of triode Q1 is connected with the anodal Input+ of input power supply; The collector electrode of triode Q1 divides two-way to be connected with the negative pole of inductance L 1 and rectifier diode D1 respectively, and the negative pole of capacitor C 1 is connected the back and divides two-way to be connected with the negative pole Output-of output and the negative pole Input-of input power supply respectively with the positive pole of rectifier diode D1; The collector electrode of triode Q2 is connected with resistance R 1; The emitter of triode Q2 is connected with the negative pole Input-of input power supply; The base stage of triode Q2 is connected with resistance R 2; The other end of resistance R 2 divides two-way to be connected with resistance R 3 and control power supply Control IC respectively, and the other end of resistance R 3 is connected with the base stage of triode Q3, and the emitter of triode Q3 is connected with the negative pole Input-of input power supply; The collector electrode of triode Q3 divides two-way to be connected with the other end of inductance L 1 and the positive pole of rectifier diode D1 respectively, and the negative pole of rectifier diode D1 is connected the back and is connected with the anodal Output+ of output with the positive pole of capacitor C 1.
The utility model is in when work, triode Q3, inductance L 1; Diode D1, diode D2 and capacitor C 1 are formed the step-down/up type translation circuit, when triode Q3 conducting; Triode Q2 and also conducting of triode Q1, input power supply Input is to inductance L 1 charging, and the electric current I in inductance L 1 satisfies formula: I
2L=U
2C; Wherein L is the inductance value of inductance L 1, and C is the capacitance of capacitor C 1, during voltage when U is the maximum functional ripple; Triode Q3 ends; Triode Q2 and triode Q1 also end, and the electric energy in the inductance L 1 discharges to capacitor C 1 through diode D1 and diode D2, to supply with the load of output Output.
Tradition step-down/up type translation circuit only needs a diode D1 or a diode D2; In the utility model; Diode D1 and diode D2 are except the effect of serving as rectifier diode, and the effect of diode D1 is: when triode Q1 conducting, prevent to import power supply Input short circuit; The effect of diode D2 is: when triode Q3 conducting, prevent capacitor C 1 short circuit.
The flyback breaking circuit that triode Q2 and triode Q1 form, its effect is: prevent when triode Q1 ends, prevent that inductance L 1 and input power supply Input from connecting to capacitor C 1 charging.
Because the negative pole of capacitor C 1 directly is connected with the negative pole of input power supply; Therefore for controlling power supply Control IC with the input of negative altogether of input power supply Input; Input control power supply Control IC and capacitor C 1 also are negative altogether points; So any load on the capacitor C 1 all can be discerned, need not any voltage shift translation circuit.
Referring to Fig. 3; Top curved portion is the voltage that the A point is ordered with respect to B among Fig. 2; The state that is used for the work of emulation power converting circuit, below the oscillogram control voltage of partly ordering with respect to B for input control power supply Control IC, can find out; Control voltage and the complete homophase of output voltage need not any translation circuit and can discern any load on the capacitor C 1.
Claims (1)
1. discern the step-down/up type translation circuit that homophase is controlled voltage for one kind; Comprise input power supply, control power supply, resistance, inductance, electric capacity, triode and rectifier diode; It is characterized in that: the emitter of triode Q1 is connected with the positive pole (Input+) of input power supply; The collector electrode of triode Q1 divides two-way to be connected with the negative pole of inductance L 1 and rectifier diode D1 respectively, and the negative pole of capacitor C 1 is connected the back and divides two-way to be connected with the negative pole (Output-) of output and the negative pole (Input-) of input power supply respectively with the positive pole of rectifier diode D1; The collector electrode of triode Q2 is connected with resistance R 1; The emitter of triode Q2 is connected with the negative pole (Input-) of input power supply; The base stage of triode Q2 is connected with resistance R 2; The other end of resistance R 2 divides two-way to be connected with resistance R 3 and control power supply Control IC respectively, and the other end of resistance R 3 is connected with the base stage of triode Q3, and the emitter of triode Q3 is connected with the negative pole (Input-) of input power supply; The collector electrode of triode Q3 divides two-way to be connected with the other end of inductance L 1 and the positive pole of rectifier diode D1 respectively, and the negative pole of rectifier diode D1 is connected the back and is connected with the positive pole (Output+) of output with the positive pole of capacitor C 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220210076 CN202617000U (en) | 2012-05-10 | 2012-05-10 | Step-up and step-down type conversion circuit capable of identifying in-phase control voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220210076 CN202617000U (en) | 2012-05-10 | 2012-05-10 | Step-up and step-down type conversion circuit capable of identifying in-phase control voltage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202617000U true CN202617000U (en) | 2012-12-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220210076 Expired - Lifetime CN202617000U (en) | 2012-05-10 | 2012-05-10 | Step-up and step-down type conversion circuit capable of identifying in-phase control voltage |
Country Status (1)
| Country | Link |
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| CN (1) | CN202617000U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102647084A (en) * | 2012-05-10 | 2012-08-22 | 上海能巍电气科技有限公司 | Buck-boost conversion circuit capable of identifying in-phase control voltage |
-
2012
- 2012-05-10 CN CN 201220210076 patent/CN202617000U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102647084A (en) * | 2012-05-10 | 2012-08-22 | 上海能巍电气科技有限公司 | Buck-boost conversion circuit capable of identifying in-phase control voltage |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 200233 A, building 391, 11 Guiping Road, Shanghai, Xuhui District, 1104-1106 Patentee after: Shanghai Wei electrical Polytron Technologies Inc. Address before: 200233 A, building 391, 11 Guiping Road, Shanghai, Xuhui District, 1104-1106 Patentee before: SHANGHAI ENLOGIC ELECTRIC TECHNOLOGY Co.,Ltd. |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20160218 Address after: 214028, tin Kun Road, Binhu District, Jiangsu, Wuxi, 11 Patentee after: ASIA PACIFIC CIS(WUXI)CO Ltd. Address before: 200233 A, building 391, 11 Guiping Road, Shanghai, Xuhui District, 1104-1106 Patentee before: Shanghai Wei electrical Polytron Technologies Inc. |
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| CX01 | Expiry of patent term |
Granted publication date: 20121219 |
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| CX01 | Expiry of patent term |