CN101436827A - Conversion circuit for DC voltage effective value - Google Patents
Conversion circuit for DC voltage effective value Download PDFInfo
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- CN101436827A CN101436827A CNA2008101777106A CN200810177710A CN101436827A CN 101436827 A CN101436827 A CN 101436827A CN A2008101777106 A CNA2008101777106 A CN A2008101777106A CN 200810177710 A CN200810177710 A CN 200810177710A CN 101436827 A CN101436827 A CN 101436827A
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Abstract
The invention belongs to a circuit, and in particular relates to a DC voltage effective-value changing circuit. The negative electrode of a power supply device of the DC voltage effective-value changing circuit is earthed; the negative electrode of the power supply device is connected with one end of an inductor L and the end 2 of a switching power supply controller respectively; the other end of the inductor L is connected with a drain electrode of a field effect tube T and one end of an electric apparatus respectively; a gate pole of the field effect tube T is connected with the end 3 of the switching power supply controller; a source electrode of the field effect tube T is earthed; the end 4 of the switching power supply controller is earthed; and the other end of the electric apparatus is earthed. The circuit effectively solves the problem of changing the effective voltage value provided by the power supply device. In addition, the DC voltage effective-value changing circuit has the advantages of simple structure, few constituent components, high energy efficiency ratio and low cost, and greatly reduces the number of circuit faults.
Description
Technical field
The invention belongs to a kind of circuit, relate in particular to conversion circuit for DC voltage effective value.
Background technology
At present, transformer or the direct-current switch power supply voltage conversion circuits of adopting in the circuit more, the dc voltage conversion that charger is provided becomes required direct voltage.This Technology Energy conversion efficiency is low, and volume is big, and weight is big, the circuit complexity, and consume material is many, cost height, failure rate height.
Summary of the invention
The present invention will provide a kind of conversion circuit for DC voltage effective value exactly, described circuit energy conversion ratio height, and volume is little, and is in light weight, and the simple consume material of circuit is few, and cost is low, and failure rate is low.
Technical scheme provided by the invention is:
Conversion circuit for DC voltage effective value, the minus earth of charger; The positive pole of charger links to each other with the end of inductor L, the termination 2 of switch power controller respectively; The other end of inductor L links to each other with the drain electrode of field effect transistor T, an end of electrical appliance respectively; The gate pole of field effect transistor T links to each other with the termination of switch power controller 3, the source ground of field effect transistor T; Termination 4 ground connection of switch power controller; The other end ground connection of electrical appliance.
Conversion circuit for DC voltage effective value, the minus earth of charger; The positive pole of charger links to each other with the end of inductor L, the termination 2 of switch power controller respectively; The other end of inductor L links to each other with the drain electrode of field effect transistor T, the end of capacitor C1, an end of electrical appliance respectively; The gate pole of field effect transistor T links to each other with the termination of switch power controller 3, the source ground of field effect transistor T; Termination 4 ground connection of switch power controller; The other end ground connection of capacitor C1; The other end ground connection of electrical appliance.
Conversion circuit for DC voltage effective value, the minus earth of charger; The positive pole of charger links to each other with the end of inductor L, the termination 2 of switch power controller respectively; The other end of inductor L links to each other with the drain electrode of field effect transistor T, the positive pole of diode D, an end of electrical appliance respectively; The gate pole of field effect transistor T links to each other with the termination of switch power controller 3, the source ground of field effect transistor T; The negative pole of diode D links to each other with an end of resistance R 1, the end of capacitor C2 respectively, resistance R 1 links to each other with the end of adjustable resistance R2, the other end of adjustable resistance R2 links to each other with an end of resistance R 3, the other end of resistance R 3 links to each other with the termination 1 of switch power controller, an end of resistance R 4 respectively, the other end ground connection of resistance R 4; Termination 4 ground connection of switch power controller; The other end ground connection of electrical appliance.
Conversion circuit for DC voltage effective value, the minus earth of charger; The positive pole of charger links to each other with the end of inductor L, the termination 2 of switch power controller respectively; The other end of inductor L links to each other with the drain electrode of field effect transistor T, the end of capacitor C1, the positive pole of diode D and an end of electrical appliance respectively; The gate pole of field effect transistor T links to each other with the termination of switch power controller 3, the source ground of field effect transistor T; The other end ground connection of capacitor C1; The negative pole of diode D links to each other with an end of resistance R 1, the end of capacitor C2 respectively; Resistance R 1 links to each other with the end of adjustable resistance R2, and the other end of adjustable resistance R2 links to each other with an end of resistance R 3, and the other end of resistance R 3 links to each other with the termination 1 of switch power controller, an end of resistance R 4 respectively; Termination 4 ground connection of switch power controller; The other end ground connection of resistance R 4; The other end ground connection of capacitor C2, the other end ground connection of electrical appliance.
Among the present invention, the charger output dc voltage.
Among the present invention, charger provides operating voltage for described conversion circuit for DC voltage effective value, and switch power controller produces frequency width pulse driven field effect transistor T.Field effect transistor T drives inductor L, forward stroke interval, inductor L storage power; Retrace interval, inductor L releases energy.Thereby, reach the purpose of translation circuit voltage effective value for electrical appliance provides energy.
Capacitor C1 is used to control retrace interval and flyback voltage among the present invention, prevents the too short field effect transistor T that burns of retrace interval, prevents too high field effect transistor and the electrical appliance of burning of flyback voltage, thus protection field effect transistor T operate as normal; Improve the power output of circuit simultaneously, make circuit working more stable, reduce electromagnetic interference.
Diode D, resistance R 1, resistance R 2, resistance R 3, resistance R 4 and capacitor C2 form sample circuit among the present invention; Diode D obtains the PP value of circuit output pulse voltage, capacitor C2 moves back lotus root, obtain comparison signal by resistance R 1, resistance R 2, resistance R 3 and resistance R 4, offer switch power controller control frequency pulse pulsewidth voltage, reach the stable purpose of output effective value voltage.
Can change the effective value of output dc voltage by changing sampling ratio.
Switch power controller is the frequency pulse width modulated circuit.The termination 1 of switch power controller is the input of electrical appliance voltage effective value sampling comparison circuit.The termination 2 of switch power controller is a positive supply.The termination 3 of switch power controller is the pulse signal output end that drives field effect transistor.The termination 4 of switch power controller is an earth terminal.
Conversion circuit for DC voltage effective value of the present invention, what offer electrical appliance is pulsed dc voltage.
The present invention adopts field effect transistor, and conduction property is good, and volume is little, working stability.
The present invention efficiently solves the problem of the effective voltage value transform that charger provides, and conversion circuit for DC voltage effective value of the present invention is simple in structure simultaneously, and it is few to form components and parts, the Energy Efficiency Ratio height, and cost is low, has significantly reduced the fault number of times.
Description of drawings
Fig. 1 is the circuit diagram of embodiment 1
Fig. 2 is the circuit diagram of embodiment 2
Fig. 3 is the circuit diagram of embodiment 3
Fig. 4 is the circuit diagram of embodiment 4
Specific embodiment
Conversion circuit for DC voltage effective value, the minus earth of charger; The positive pole of charger links to each other with the end of inductor L, the termination 2 of switch power controller respectively; The other end of inductor L links to each other with the drain electrode of field effect transistor T, an end of electrical appliance respectively; The gate pole of field effect transistor T links to each other with the termination of switch power controller 3, the source ground of field effect transistor T; Termination 4 ground connection of switch power controller; The other end ground connection of electrical appliance.
Conversion circuit for DC voltage effective value, the minus earth of charger; The positive pole of charger links to each other with the end of inductor L, the termination 2 of switch power controller respectively; The other end of inductor L links to each other with the drain electrode of field effect transistor T, the end of capacitor C1, an end of electrical appliance respectively; The gate pole of field effect transistor T links to each other with the termination of switch power controller 3, the source ground of field effect transistor T; Termination 4 ground connection of switch power controller; The other end ground connection of capacitor C1; The other end ground connection of electrical appliance.
Embodiment 3
Conversion circuit for DC voltage effective value, the minus earth of charger; The positive pole of charger links to each other with the end of inductor L, the termination 2 of switch power controller respectively; The other end of inductor L links to each other with the drain electrode of field effect transistor T, the positive pole of diode D, an end of electrical appliance respectively; The gate pole of field effect transistor T links to each other with the termination of switch power controller 3, the source ground of field effect transistor T; The negative pole of diode D links to each other with an end of resistance R 1, the end of capacitor C2 respectively, resistance R 1 links to each other with the end of adjustable resistance R2, the other end of adjustable resistance R2 links to each other with an end of resistance R 3, the other end of resistance R 3 links to each other with the termination 1 of switch power controller, an end of resistance R 4 respectively, the other end ground connection of resistance R 4; Termination 4 ground connection of switch power controller; The other end ground connection of electrical appliance.
Conversion circuit for DC voltage effective value, the minus earth of charger; The positive pole of charger links to each other with the end of inductor L, the termination 2 of switch power controller respectively; The other end of inductor L links to each other with the drain electrode of field effect transistor T, the end of capacitor C1, the positive pole of diode D and an end of electrical appliance respectively; The gate pole of field effect transistor T links to each other with the termination of switch power controller 3, the source ground of field effect transistor T; The other end ground connection of capacitor C1; The negative pole of diode D links to each other with an end of resistance R 1, the end of capacitor C2 respectively; Resistance R 1 links to each other with the end of adjustable resistance R2, and the other end of adjustable resistance R2 links to each other with an end of resistance R 3, and the other end of resistance R 3 links to each other with the termination 1 of switch power controller, an end of resistance R 4 respectively; Termination 4 ground connection of switch power controller; The other end ground connection of resistance R 4; The other end ground connection of capacitor C2, the other end ground connection of electrical appliance.
Should be noted that at last: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit; Although with reference to preferred embodiment the present invention is had been described in detail, those of ordinary skill in the field are to be understood that: still can make amendment or the part technical characterictic is equal to replacement the specific embodiment of the present invention; And not breaking away from the spirit of technical solution of the present invention, it all should be encompassed in the middle of the technical scheme scope that the present invention asks for protection.
Claims (4)
1, conversion circuit for DC voltage effective value is characterized in that, the minus earth of charger; The positive pole of charger links to each other with the end of inductor L, the termination 2 of switch power controller respectively; The other end of inductor L links to each other with the drain electrode of field effect transistor T, an end of electrical appliance respectively; The gate pole of field effect transistor T links to each other with the termination of switch power controller 3, the source ground of field effect transistor T; Termination 4 ground connection of switch power controller; The other end ground connection of electrical appliance.
2, according to the described conversion circuit for DC voltage effective value of claim 1, it is characterized in that the minus earth of charger; The positive pole of charger links to each other with the end of inductor L, the termination 2 of switch power controller respectively; The other end of inductor L links to each other with the drain electrode of field effect transistor T, the end of capacitor C1, an end of electrical appliance respectively; The gate pole of field effect transistor T links to each other with the termination of switch power controller 3, the source ground of field effect transistor T; Termination 4 ground connection of switch power controller; The other end ground connection of capacitor C1; The other end ground connection of electrical appliance.
3, according to the described conversion circuit for DC voltage effective value of claim 1, it is characterized in that the minus earth of charger; The positive pole of charger links to each other with the end of inductor L, the termination 2 of switch power controller respectively; The other end of inductor L links to each other with the drain electrode of field effect transistor T, the positive pole of diode D, an end of electrical appliance respectively; The gate pole of field effect transistor T links to each other with the termination of switch power controller 3, the source ground of field effect transistor T; The negative pole of diode D links to each other with an end of resistance R 1, the end of capacitor C2 respectively, resistance R 1 links to each other with the end of adjustable resistance R2, the other end of adjustable resistance R2 links to each other with an end of resistance R 3, the other end of resistance R 3 links to each other with the termination 1 of switch power controller, an end of resistance R 4 respectively, the other end ground connection of resistance R 4; Termination 4 ground connection of switch power controller; The other end ground connection of electrical appliance.
4, according to claim 1,2 or 3 described conversion circuit for DC voltage effective value, it is characterized in that the minus earth of charger; The positive pole of charger links to each other with the end of inductor L, the termination 2 of switch power controller respectively; The other end of inductor L links to each other with the drain electrode of field effect transistor T, the end of capacitor C1, the positive pole of diode D and an end of electrical appliance respectively; The gate pole of field effect transistor T links to each other with the termination of switch power controller 3, the source ground of field effect transistor T; The other end ground connection of capacitor C1; The negative pole of diode D links to each other with an end of resistance R 1, the end of capacitor C2 respectively; Resistance R 1 links to each other with the end of adjustable resistance R2, and the other end of adjustable resistance R2 links to each other with an end of resistance R 3, and the other end of resistance R 3 links to each other with the termination 1 of switch power controller, an end of resistance R 4 respectively; Termination 4 ground connection of switch power controller; The other end ground connection of resistance R 4; The other end ground connection of capacitor C2, the other end ground connection of electrical appliance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101777106A CN101436827A (en) | 2008-11-11 | 2008-11-11 | Conversion circuit for DC voltage effective value |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101777106A CN101436827A (en) | 2008-11-11 | 2008-11-11 | Conversion circuit for DC voltage effective value |
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|---|---|
| CN101436827A true CN101436827A (en) | 2009-05-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008101777106A Pending CN101436827A (en) | 2008-11-11 | 2008-11-11 | Conversion circuit for DC voltage effective value |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102830740A (en) * | 2012-08-23 | 2012-12-19 | 矽力杰半导体技术(杭州)有限公司 | High-efficiency bias voltage generating circuit |
-
2008
- 2008-11-11 CN CNA2008101777106A patent/CN101436827A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102830740A (en) * | 2012-08-23 | 2012-12-19 | 矽力杰半导体技术(杭州)有限公司 | High-efficiency bias voltage generating circuit |
| CN102830740B (en) * | 2012-08-23 | 2014-04-30 | 矽力杰半导体技术(杭州)有限公司 | High-efficiency bias voltage generating circuit |
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Open date: 20090520 |