CN204681252U - A kind of Width funtion laser drive power based on the work of SEPIC topology - Google Patents
A kind of Width funtion laser drive power based on the work of SEPIC topology Download PDFInfo
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- CN204681252U CN204681252U CN201520207952.0U CN201520207952U CN204681252U CN 204681252 U CN204681252 U CN 204681252U CN 201520207952 U CN201520207952 U CN 201520207952U CN 204681252 U CN204681252 U CN 204681252U
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- 239000003990 capacitor Substances 0.000 claims description 6
- 230000001808 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 230000001105 regulatory Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Abstract
The utility model discloses a kind of Width funtion laser drive power based on the work of SEPIC topology, comprising: switching power source chip IC1, the first power inductance L1, the second power inductance L2, Schottky diode D1, input capacitance C1, electric capacity C2, output capacitance C3, resistance R1, resistance R2 and resistance R3.The utility model can at super wide voltage operated within range, compatible strong, be applicable to multiple power sources adapter power or polytype battery and battery-powered occasion, efficiency is high, generates heat little, safety, not easy burn-out, output voltage control is flexible, can adjust output voltage in real time by control system, to meet the dynamic requirements that laser drives.
Description
Technical field
The utility model relates to power technique fields, is specifically related to a kind of Width funtion laser drive power based on the work of SEPIC topology.
Background technology
SEPIC(Single Ended Primary Inductor Converter) type DC-DC converter is a kind of wide die mould supply convertor, output voltage is allowed to be greater than, to be less than or equal to input voltage, and input and output voltage same polarity, is particularly useful for battery powered occasion.
Such as, the voltage of one piece of lithium battery is 3V-4.2V, and load needs 3.3V, adopt simple boosting or buck converter all cannot realize, and SEPIC code converter meets this demand just; Again such as, in the use occasion that some security requirements are high, for avoid lithium battery heavy-current discharge cause battery core generate heat and produce mechanical deformation, shorten the problem that battery even damages battery, the method of usual employing multiple batteries series connection, make output voltage improve N doubly, then output current reduces to 1/N, thus reduction cell output current at double, significantly improve battery and fail safe.Therefore, require that DC-DC converter has Width funtion, high efficiency performance, adopt SEPIC code converter to be enough to be competent at.
In addition, in some control system, require that output voltage is adjustable, output voltage size-controlled in the voltage of control signal, and not by the impact of input voltage.Conventional DC-DC converter, comprises SEPIC code converter and is fixed voltage output, do not support output voltage regulatory function, therefore need to transform conventional inverter circuit, and then improve practicality and ease for use.
Summary of the invention
The purpose of this utility model proposes a kind of Width funtion laser drive power based on the work of SEPIC topology.
The technical solution adopted in the utility model is, based on a Width funtion laser drive power for SEPIC topology work, comprising: switching power source chip IC1, the first power inductance L1, the second power inductance L2, Schottky diode D1, input capacitance C1, electric capacity C2, output capacitance C3, resistance R1, resistance R2 and resistance R3; The positive and negative electrode of described input capacitance C1 is connected with the positive and negative electrode of input power Vin respectively; The positive and negative feeder ear of described switching power source chip IC1 is connected with the positive and negative electrode of input power Vin respectively; One end of first power inductance L1 is connected with the positive pole of input power Vin, and the other end holds with the SW of switching power source chip IC1 and electric capacity C2 is connected; One end of described second power inductance L2 is connected with the negative pole of input power Vin, and the other end is connected with the positive pole of electric capacity C2 and Schottky diode D1; The positive pole of described output capacitance C3 is connected with the positive pole of output voltage Vout with the negative pole of Schottky diode D1; Described resistance R2 one end connects output voltage Vout positive pole, the FB end of other end contact resistance R1, resistance R3 and switching power source chip IC1, and the resistance R1 other end connects output voltage Vout negative pole; The input of described resistance R3 connects output voltage control end Vset.
Further, described first power inductance L1 and the second power inductance L2 is independent setting or integrated coupling inductance.
Further, described switching power source chip IC1 is BOOST type boosted switch power supply chip, or is SEPIC type buck switch power special chip.
Further, described input capacitance C1 is that nonpolarity high-frequency electrical perhaps has the low internal resistance of polarity high frequency
Electrochemical capacitor.
Further, described output capacitance C3 is that nonpolarity high-frequency electrical perhaps has the low internal resistance of polarity high frequency
Electrochemical capacitor.
Further, described electric capacity C2 is the low internal resistance electric capacity of nonpolarity high frequency.
Further, described Schottky diode D1 is the high speed Schottky type power diode of low conduction voltage drop, big current.
Advantage of the present utility model:
The utility model can at super wide voltage operated within range, and compatibility is strong, is applicable to multiple adapter
Power supply or polytype battery and battery-powered occasion, efficiency is high, generates heat little, safety, not easy burn-out, and output voltage control is flexible, can adjust output voltage in real time by control system, to meet the dynamic requirements that laser drives.
Except object described above, feature and advantage, the utility model also has other object, feature and advantage.Below with reference to figure, the utility model is described in further detail.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide further understanding of the present utility model, and schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.
Fig. 1 is the Width funtion laser drive power schematic diagram based on the work of SEPIC topology of the utility model embodiment.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
Fig. 1 shows a kind of Width funtion laser drive power schematic diagram based on the work of SEPIC topology of the present utility model.
Based on a Width funtion laser drive power for SEPIC topology work, comprising: switching power source chip IC1, the first power inductance L1, the second power inductance L2, Schottky diode D1, input capacitance C1, electric capacity C2, output capacitance C3, resistance R1, resistance R2 and resistance R3; The positive and negative electrode of described input capacitance C1 is connected with the positive and negative electrode of input power Vin respectively; The positive and negative feeder ear of described switching power source chip IC1 is connected with the positive and negative electrode of input power Vin respectively; One end of first power inductance L1 is connected with the positive pole of input power Vin, and the other end holds with the SW of switching power source chip IC1 and electric capacity C2 is connected; One end of described second power inductance L2 is connected with the negative pole of input power Vin, and the other end is connected with the positive pole of electric capacity C2 and Schottky diode D1; The positive pole of described output capacitance C3 is connected with the positive pole of the negative pole of Schottky diode with output voltage Vout; Described resistance R2 one end connects output voltage Vout positive pole, the FB end of other end contact resistance R1, resistance R3 and switching power source chip IC1, and the resistance R1 other end connects output voltage Vout negative pole; The input of described resistance R3 connects output voltage control end Vset.
Described first power inductance L1 and the second power inductance L2 is independent setting or integrated coupling inductance.
Described switching power source chip IC1 is BOOST type boosted switch power supply chip, or is SEPIC type buck switch power special chip.
Described input capacitance C1 is that nonpolarity high-frequency electrical perhaps has the low internal resistance electrochemical capacitor of polarity high frequency.
Described output capacitance C3 is that nonpolarity high-frequency electrical perhaps has the low internal resistance electrochemical capacitor of polarity high frequency.
Described electric capacity C2 is the low internal resistance electric capacity of nonpolarity high frequency.
Described Schottky diode D1 is the high speed Schottky type power diode of low conduction voltage drop, big current.
The utility model embodiment, on basic SEPIC circuit topology basis, increases regulating resistor R3, and realizes the control to output voltage by control voltage Vset, and relational expression is:
Wherein Vfb by the reference voltage of feedback end FB of employing switching power source chip IC1, according to different output voltage requirements, configuring the design parameter of each resistance, namely by regulating the voltage of Vset, obtaining the output voltage Vout wanted.
The utility model can at super wide voltage operated within range, and compatibility is strong, is applicable to multiple power sources and fits
Orchestration is powered or polytype battery and battery-powered occasion, and efficiency is high, generates heat little, safety, not easy burn-out, and output voltage control is flexible, can adjust output voltage in real time by control system, to meet the dynamic requirements that laser drives.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection range of the present utility model.
Claims (7)
1. the Width funtion laser drive power based on the work of SEPIC topology, it is characterized in that, comprising: switching power source chip IC1, the first power inductance L1, the second power inductance L2, Schottky diode D1, input capacitance C1, electric capacity C2, output capacitance C3, resistance R1, resistance R2 and resistance R3; The positive and negative electrode of described input capacitance C1 is connected with the positive and negative electrode of input power Vin respectively; The positive and negative feeder ear of described switching power source chip IC1 is connected with the positive and negative electrode of input power Vin respectively; One end of first power inductance L1 is connected with the positive pole of input power Vin, and the other end holds with the SW of switching power source chip IC1 and electric capacity C2 is connected; One end of described second power inductance L2 is connected with the negative pole of input power Vin, and the other end is connected with the positive pole of electric capacity C2 and Schottky diode D1; The positive pole of described output capacitance C3 is connected with the positive pole of output voltage Vout with the negative pole of Schottky diode D1; Described resistance R2 one end connects output voltage Vout positive pole, the FB end of other end contact resistance R1, resistance R3 and switching power source chip IC1, and the resistance R1 other end connects output voltage Vout negative pole; The input of described resistance R3 connects output voltage control end Vset.
2. the Width funtion laser drive power based on the work of SEPIC topology according to claim 1, is characterized in that, described first power inductance L1 and the second power inductance L2 is independent setting or integrated coupling inductance.
3. the Width funtion laser drive power based on the work of SEPIC topology according to claim 1, it is characterized in that, described switching power source chip IC1 is BOOST type boosted switch power supply chip, or is SEPIC type buck switch power special chip.
4. the Width funtion laser drive power based on the work of SEPIC topology according to claim 1, it is characterized in that, described input capacitance C1 is that nonpolarity high-frequency electrical perhaps has the low internal resistance electrochemical capacitor of polarity high frequency.
5. the Width funtion laser drive power based on the work of SEPIC topology according to claim 1, it is characterized in that, described output capacitance C3 is that nonpolarity high-frequency electrical perhaps has the low internal resistance electrochemical capacitor of polarity high frequency.
6. the Width funtion laser drive power based on the work of SEPIC topology according to claim 1, it is characterized in that, described electric capacity C2 is the low internal resistance electric capacity of nonpolarity high frequency.
7. the Width funtion laser drive power based on the work of SEPIC topology according to claim 1, it is characterized in that, described Schottky diode D1 is the high speed Schottky type power diode of low conduction voltage drop, big current.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520207952.0U CN204681252U (en) | 2015-04-09 | 2015-04-09 | A kind of Width funtion laser drive power based on the work of SEPIC topology |
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| CN201520207952.0U CN204681252U (en) | 2015-04-09 | 2015-04-09 | A kind of Width funtion laser drive power based on the work of SEPIC topology |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104734519A (en) * | 2015-04-09 | 2015-06-24 | 王莹 | Wide-voltage laser drive power source based on SEPIC topology work |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104734519A (en) * | 2015-04-09 | 2015-06-24 | 王莹 | Wide-voltage laser drive power source based on SEPIC topology work |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150930 Termination date: 20180409 |