CN106384934A - Realization method of multipath semiconductor laser driving power supply - Google Patents
Realization method of multipath semiconductor laser driving power supply Download PDFInfo
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- CN106384934A CN106384934A CN201510573444.9A CN201510573444A CN106384934A CN 106384934 A CN106384934 A CN 106384934A CN 201510573444 A CN201510573444 A CN 201510573444A CN 106384934 A CN106384934 A CN 106384934A
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- circuit
- semiconductor laser
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- power supply
- driving power
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Abstract
A realization method of a multipath semiconductor laser driving power supply relates to the semiconductor laser driving power supply technology field. In a conventional realization method of the multipath semiconductor laser driving power supply, a plurality of single-path semiconductor laser driving power supplies are directly used to simply combine. The combination-type mode has advantages of a large size and high energy consumption. The invention discloses the realization method of the multipath semiconductor laser driving power supply. In the method, driving circuits share an AC/DC converting circuit, a single-chip microcomputer control circuit and a current feedback circuit; a comparison circuit and a driving circuit of a single-path semiconductor laser power supply are replaced by a multipath comparison circuit and a multipath driving circuit; and additionally, an analog conversion switch circuit is increased. Compared to the conventional realization method, the realization method of the multipath semiconductor laser driving power supply possesses characteristics of a small integral size and low energy consumption.
Description
Art
The present invention relates to semiconductor laser drive power technical field, especially relate to multi-channel semiconductor laser drive power technical field.
Technical background
Single channel semiconductor laser drive power comprises AC/DC change-over circuit, single chip machine controlling circuit, comparison circuit, drive circuit, current feedback
Circuit.The implementation method of multi-channel semiconductor laser drive power is generally applied in combination using by multiple single channel semiconductor laser drive powers.This
Knockdown Laser Power Devices have the shortcomings that volume is big, big energy-consuming, are especially not suitable with the system integration having space to limit.
Content of the invention
The invention discloses a kind of implementation method of multi-channel semiconductor laser drive power, this method is that multi-channel semiconductor drive circuit for laser is common
With AC/DC change-over circuit, single chip machine controlling circuit, current feedback circuit, and by the comparison circuit of single channel semiconductor laser drive power and driving
Circuit multichannel comparison circuit, multi-channel driver circuit replace, and in addition increased an analog multiplexer circuit.
The present invention solving the scheme that adopted of its technical problem is：Single chip machine controlling circuit carries out electricity to multi-channel semiconductor drive circuit for laser simultaneously
The setting of stream size and on-off control.The output letter of the reverse input end common current feedback circuit of each road operational amplifier of multichannel comparison circuit
Number.The semiconductor laser positive pole of multi-channel driver circuit is commonly connected to the outfan of AC/DC change-over circuit.Described implementation method is driven due to multichannel
A dynamic shared single chip machine controlling circuit, is easier to realize each road output driving and the sequential relationship stopping through the control of TTL logic circuit.Institute
The implementation method stated, due to having shared partial circuit, reduces power volume, improves the overall transformation efficiency of power supply.
The invention has the beneficial effects as follows：Due to multi-channel semiconductor drive circuit for laser shared partial circuit so that power supply overall volume relatively small,
Energy consumption is low, stable and reliable operation.
Brief description
Fig. 1 is general single channel semiconductor laser drive power theory diagram.
Fig. 2 is present invention electricity principle schematic.
In figure L1 is filter inductance, and C1 is filter capacitor, and U1, U2, U3, U4, U5 are operational amplifier, and U6 is analog multiplexer, R1,
R2, R3, R4, R5, R6, R7, R8 are fixed resistance, and Q1, Q2, Q3, Q4 are MOSFET (field-effect transistor), D1, D2, D3, D4
For semiconductor laser.
Specific embodiment
In FIG, AC220V inputs after AC-DC change-over circuit, is on the one hand to provide DC source to single chip machine controlling circuit, on the other hand
It is to provide electric energy to laser drive circuit.The output of the D/A converter of single chip machine controlling circuit is to the operational amplifier input in the same direction of comparison circuit.
The feedback exporting signal is added to the operational amplifier reverse input end of comparison circuit by current feedback circuit.The setting mould that single-chip microcomputer is provided by comparison circuit
The analog quantity of analog quantity and current feedback circuit offer is compared, and then output control voltage is to drive circuit.The positive pole of semiconductor laser and AC-DC
The output of change-over circuit is connected, and negative pole is connected with drive circuit MOSFET.Circuit shown in Fig. 1 is substantially an adjustable constant current source of output.
General multi-channel semiconductor laser drive power is exactly the combination of the single channel semiconductor laser drive power shown in Fig. 1.
In fig. 2, the analog switch (U6) that the output of the D/A converter of single chip machine controlling circuit controls through TTL logic circuit is compared with multichannel
The input in the same direction of multiple operational amplifiers of circuit is connected.The feedback of output is signally attached to the multiple of multichannel comparison circuit by current feedback circuit
Operational amplifier reverse input end.Setting analog quantity that single-chip microcomputer is provided by multichannel comparison circuit and the feedback signal that current feedback circuit provides are compared
Relatively, then output multi-channel control voltage gives corresponding drive circuit respectively.The positive pole of multi-channel semiconductor laser instrument is connected, and with AC-DC change-over circuit
Output be connected, negative pole is connected with multiple MOSFET (field-effect transistor) of multi-channel driver circuit respectively.The electric current of multi-channel semiconductor laser instrument leads to
Disconnected is to be controlled by the TTL logic circuit of single chip machine controlling circuit, and the current amplitude size of laser instrument is by the D/A conversion output of single chip machine controlling circuit
Analog control.
Claims (2)
1. a kind of implementation method of multi-channel semiconductor laser drive power, comprises AC/DC change-over circuit, single chip machine controlling circuit, comparison circuit, driving
Circuit, current feedback circuit, is characterized in that：Multi-channel driver circuit shares AC/DC change-over circuit, single chip machine controlling circuit, current feedback circuit,
Replace comparison circuit and the drive circuit of single channel semiconductor laser drive power with multichannel comparison circuit and multi-channel driver circuit, increased analog-converted
On-off circuit (U6).
2. a kind of implementation method of multi-channel semiconductor laser drive power according to claim 1, is characterized in that：The output letter of current feedback circuit
Number it is connected to each operational amplifier reverse input end of multichannel comparison circuit；Each operational amplifier of multichannel comparison circuit in the same direction input with
Analog switching circuit is connected；The output of multichannel comparison circuit is connected respectively at the grid of the MOSFET (field-effect transistor) of multi-channel driver circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510573444.9A CN106384934A (en) | 2015-09-11 | 2015-09-11 | Realization method of multipath semiconductor laser driving power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510573444.9A CN106384934A (en) | 2015-09-11 | 2015-09-11 | Realization method of multipath semiconductor laser driving power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106384934A true CN106384934A (en) | 2017-02-08 |
Family
ID=57916477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201510573444.9A Pending CN106384934A (en) | 2015-09-11 | 2015-09-11 | Realization method of multipath semiconductor laser driving power supply |
Country Status (1)
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019067831A (en) * | 2017-09-28 | 2019-04-25 | シャープ株式会社 | Optical sensor and electronic apparatus |
| CN112444963A (en) * | 2019-08-30 | 2021-03-05 | 成都理想境界科技有限公司 | Light source driving circuit and display module |
| CN112531458A (en) * | 2021-02-09 | 2021-03-19 | 湖北鑫英泰系统技术股份有限公司 | Laser driving circuit for distributed optical fiber temperature measurement system |
| WO2021138774A1 (en) * | 2020-01-06 | 2021-07-15 | 深圳市大疆创新科技有限公司 | Multi-line laser module, laser radar, and movable platform |
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| JP2001144368A (en) * | 1999-11-10 | 2001-05-25 | Mitsui Chemicals Inc | Laser driver |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019067831A (en) * | 2017-09-28 | 2019-04-25 | シャープ株式会社 | Optical sensor and electronic apparatus |
| CN112444963A (en) * | 2019-08-30 | 2021-03-05 | 成都理想境界科技有限公司 | Light source driving circuit and display module |
| WO2021138774A1 (en) * | 2020-01-06 | 2021-07-15 | 深圳市大疆创新科技有限公司 | Multi-line laser module, laser radar, and movable platform |
| CN112531458A (en) * | 2021-02-09 | 2021-03-19 | 湖北鑫英泰系统技术股份有限公司 | Laser driving circuit for distributed optical fiber temperature measurement system |
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Application publication date: 20170208 |
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