CN101192796A - Voltage ascending power circuit - Google Patents
Voltage ascending power circuit Download PDFInfo
- Publication number
- CN101192796A CN101192796A CNA2006101571439A CN200610157143A CN101192796A CN 101192796 A CN101192796 A CN 101192796A CN A2006101571439 A CNA2006101571439 A CN A2006101571439A CN 200610157143 A CN200610157143 A CN 200610157143A CN 101192796 A CN101192796 A CN 101192796A
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- inductance
- triode
- power supply
- diode
- supply circuit
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- 230000001174 ascending effect Effects 0.000 title 1
- 230000006698 induction Effects 0.000 claims abstract description 9
- 239000004065 semiconductor Substances 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 238000004804 winding Methods 0.000 description 1
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Abstract
The invention discloses a boost power supply circuit, which comprises essentially a DC-DC controller, a triode, a first diode, a first inductance and a first capacitance. A control switch pulse is led out from a PWM output pin of a DC-DC controller to control the breakover or cut-off of the triode; positive and negative voltages are formed on the two ends of the first inductance which connects the collector of the triode, when the triode is in the breakover state; a higher self induction electromotive force is formed on the two ends of the first inductance, when the triode is quickly cut off, and the polarity of the self induction electromotive force is opposite, when the triode is in the breakover state. The voltage generated by the first inductance is commutated through the first diode and the first capacitance and forms the boost voltage. The boost power supply circuit of the invention is mainly characterized in that the switching signal of the DC-DC controller in the circuit is used for forming a simple boost circuit to generate a needed high voltage for the circuit, so that the circuit is simple and low in cost.
Description
Technical field
The present invention relates to electronic applications, relate in particular to the power circuit technology in the electronic applications.
Background technology
In circuits such as LCD, CRT, camera, often need higher supply power voltage, following several producing method is generally arranged: a kind of by the independent winding rectification generation of power switch transformer; A kind ofly produce by the integrated circuit step-down by higher supply voltage; When circuit does not possess above condition, have only by shown in the accompanying drawing, provide by the special integrated circuit that boosts.As shown in Figure 1, be a kind of booster power supply circuit of prior art, booster power supply circuit comprises LTC3872 chip 110, resistance 111,112,113,114,115, electric capacity 121,122,123,124,125, diode 130, metal-oxide-semiconductor 131, inductance 132.Wherein, the resistance value of resistance 111 is 92.3K ohm, the resistance value of resistance 112 is 1M ohm, the resistance value of resistance 113 is 468K ohm, the resistance value of resistance 114 is 12K ohm, the value of electric capacity 121,122,123,124,125 is respectively: 4.7nF, 0.022uF, 10uF, 68uF, 22uF, the value of inductance 132 is 10uH..Wherein, this LTC3872 is the current mode boost type DC/DC controller of 550kHz, the input voltage of 2.5～9.8V can be converted to higher output voltage, exportable 60V voltage.As voltage, boost and export the voltage of 48V, 0.5A by input Vin input 5V.But the major defect of this circuit is the circuit complexity, and cost is higher.
Summary of the invention
In view of this, the present invention's goal of the invention is to provide a kind of booster power supply circuit, makes circuit simple, and cost is lower.
A kind of booster power supply circuit, wherein, this booster power supply circuit mainly comprises the DC-DC controller, triode, first diode, first inductance and first electric capacity, draw a way control switch pulse from the PWM output pin of DC-DC controller, control triode conducting and ending, when the triode conducting, the two ends that connect first inductance of transistor collector are just forming/negative voltage, when triode ends fast, form higher self induction electromotive force at the first inductance two ends, and this self induction electromotive force during with the triode conducting polarity opposite, the voltage that first inductance produces forms the voltage that boosts through first diode and the first electric capacity rectification again.
Described triode can be metal-oxide-semiconductor.
Described first diode is connected with first inductance, and connects transistor collector between first diode and first inductance.
Described booster power supply circuit also comprises second electric capacity and first resistance, and the PWM output pin of described DC-DC controller connects the triode base electrode by second electric capacity and first resistance.
The grounded emitter of described triode, and the emitter of this triode also links to each other with the output of first diode by first electric capacity.
Described booster power supply circuit also comprises the 3rd electric capacity, second inductance, second diode, the pin 1,5 of DC-DC controller meets Vcc 1, pin 3,6 ground connection of DC-DC controller, and the pin 2 of DC-DC controller connects second inductance, wherein the 3rd electric capacity is connected with second diode, and ground connection between the 3rd electric capacity and second diode, the circuit after this series connection is in parallel with second inductance, another termination Vcc2 of second inductance.
Compared with prior art, because the present invention's booster power supply circuit, because its PWM output pin from the DC-DC controller is drawn a way control switch pulse, control triode conducting and ending, when the triode conducting, the two ends that connect first inductance of transistor collector are just forming/negative voltage, when triode ends fast, form higher self induction electromotive force at the first inductance two ends, and this self induction electromotive force during with the triode conducting polarity opposite, the voltage that first inductance produces forms the voltage that boosts through first diode and the first electric capacity rectification again.Shown in make that the circuit of booster power supply circuit is simple, cost is lower.
Description of drawings
Fig. 1 is the circuit structure block diagram of a kind of booster power supply circuit of prior art;
Fig. 2 is the circuit structure block diagram of a kind of booster power supply circuit of better embodiment of the present invention.
Embodiment
For the purpose, technical scheme, the advantage that make the present invention is clearer and more definite, clear, the present invention's technical scheme is described in further detail below in conjunction with embodiment, accompanying drawing.
As shown in Figure 2, be the circuit structure block diagram of a kind of booster power supply circuit of better embodiment of the present invention.As shown in the figure, this booster power supply circuit mainly comprises DC-DC controller 20, resistance 21, electric capacity 221,222,223, inductance 231,232, diode 241,242, triode 25.Wherein, DC-DC controller 20 is current mode boost type DC/DC controllers of 550kHz, the input voltage of 2.5～9.8V can be converted to higher output voltage, exportable 60V voltage.In addition, this better embodiment adopts triode 25, and this triode 25 also can metal-oxide-semiconductor.
The pin 1,5 of DC-DC controller 20 meets Vcc1, pin 3,6 ground connection of DC-DC controller 20, and the pin 2 of DC-DC controller 20 connects inductance 232, and the pin 4 of DC-DC controller 20 connects electric capacity 221.Wherein electric capacity 223 is connected with diode 241, and ground connection between electric capacity 223 and the diode 241, and the circuit after the series connection is in parallel with inductance 232, and inductance 232 meets Vcc2.Electric capacity 221 series inductances 21, inductance 21 connects the base electrode of triode 25.The grounded emitter of triode 25, the collector electrode of triode 25 connect between inductance 231 and the diode 242, and inductance 231 another interfaces connect voltage U 1, and another interface of diode 242 connects voltage U 3.The two ends of electric capacity 222 meet the emitter of triode 25 and another interface U3 of diode 242 respectively.
See also Fig. 2, booster power supply circuit of the present invention mainly utilizes existing DC-DC controller 20 in the circuit, draw a way control switch pulse from its PWM output pin 4, go to control the conducting of triode 25 (or metal-oxide-semiconductor 25) and end, when triode 25 conductings, form at inductance 231 two ends U1 just/the negative voltage of U3, when triode 25 ends fast, because the electric current of inductance 231 can not suddenly change, form higher self induction electromotive force at inductance 231 two ends, polarity be U1 negative //U3 just, the U3 of inductance 231 end high voltage forms the power supply that boosts through diode 242 and electric capacity 222 rectifications again, supply and demand wants high-tension circuit to use.
The main feature of above-mentioned booster power supply circuit is to utilize the DC-DC controller, gets its switching signal, constitutes a simple booster circuit, produces one tunnel required high voltage, and use on the power supply road.For example in the LCD TV TUNER required+the 33V tuning voltage, just can adopt this mode to produce.
Though the present invention is described with reference to current better embodiment; but those skilled in the art will be appreciated that; above-mentioned better embodiment only is used for illustrating the present invention; be not to be used for limiting protection scope of the present invention; any within the spirit and principles in the present invention scope; any modification of being done, equivalence replacement, improvement etc. all should be included within the scope of the present invention.
Claims (6)
1. booster power supply circuit, it is characterized in that: this booster power supply circuit mainly comprises the DC-DC controller, triode, first diode, first inductance and first electric capacity, draw a way control switch pulse from the PWM output pin of DC-DC controller, control triode conducting and ending, when the triode conducting, the two ends that connect first inductance of transistor collector are just forming/negative voltage, when triode ends fast, form higher self induction electromotive force at the first inductance two ends, and this self induction electromotive force during with the triode conducting polarity opposite, the voltage that the voltage that first inductance produces boosts through first diode and first electric capacity rectification formation again.
2. booster power supply circuit as claimed in claim 1 is characterized in that: described triode can be metal-oxide-semiconductor.
3. booster power supply circuit as claimed in claim 1 is characterized in that: described first diode is connected with first inductance, and connects transistor collector between first diode and first inductance.
4. booster power supply circuit as claimed in claim 1 is characterized in that: described booster power supply circuit also comprises second electric capacity and first resistance, and the PWM output pin of described DC-DC controller connects the triode base electrode by second electric capacity and first resistance.
5. booster power supply circuit as claimed in claim 1 is characterized in that: the grounded emitter of described triode, and the emitter of this triode also links to each other with the output of first diode by first electric capacity.
6. booster power supply circuit as claimed in claim 1, it is characterized in that: described booster power supply circuit also comprises the 3rd electric capacity, second inductance, second diode, the pin 1,5 of DC-DC controller meets Vcc1, pin 3,6 ground connection of DC-DC controller, the pin 2 of DC-DC controller connects second inductance, and wherein the 3rd electric capacity is connected with second diode, and ground connection between the 3rd electric capacity and second diode, circuit after this series connection is in parallel with second inductance, another termination Vcc2 of second inductance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101571439A CN101192796A (en) | 2006-11-28 | 2006-11-28 | Voltage ascending power circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101571439A CN101192796A (en) | 2006-11-28 | 2006-11-28 | Voltage ascending power circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101192796A true CN101192796A (en) | 2008-06-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006101571439A Pending CN101192796A (en) | 2006-11-28 | 2006-11-28 | Voltage ascending power circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN101192796A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101753019B (en) * | 2008-12-02 | 2012-07-04 | 立锜科技股份有限公司 | Negative voltage supply circuit and method for supplying negative voltage |
| CN109842679A (en) * | 2019-01-28 | 2019-06-04 | 广东沅朋网络科技有限公司 | Energy data remote gathering system under 4G network weak signal scene |
| CN111736049A (en) * | 2020-08-05 | 2020-10-02 | 广东电网有限责任公司 | Generator for simulating partial discharge signal |
-
2006
- 2006-11-28 CN CNA2006101571439A patent/CN101192796A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101753019B (en) * | 2008-12-02 | 2012-07-04 | 立锜科技股份有限公司 | Negative voltage supply circuit and method for supplying negative voltage |
| CN109842679A (en) * | 2019-01-28 | 2019-06-04 | 广东沅朋网络科技有限公司 | Energy data remote gathering system under 4G network weak signal scene |
| CN109842679B (en) * | 2019-01-28 | 2021-06-29 | 广东沅朋网络科技有限公司 | Electric energy data remote acquisition system under 4G network weak signal scene |
| CN111736049A (en) * | 2020-08-05 | 2020-10-02 | 广东电网有限责任公司 | Generator for simulating partial discharge signal |
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Open date: 20080604 |