CN104466667B - A kind of high current high frequency LD pulse driving circuits of low-power consumption - Google Patents
A kind of high current high frequency LD pulse driving circuits of low-power consumption Download PDFInfo
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Abstract
The present invention relates to a kind of high current high frequency LD pulse driving circuits of low-power consumption, it includes Switching Power Supply, transformer, counnter attack diode, triode, charging capacitor, coupled capacitor, first resistor, second resistance, laser diode, trigger；Switching Power Supply is connected to the primary side input of transformer, and the secondary output of transformer is connected to the anode of counnter attack diode, and the negative electrode of counnter attack diode is connected to the colelctor electrode of triode；The end of charging capacitor one is connected to the colelctor electrode of triode, another negative electrode for being terminated at laser diode, the plus earth of laser diode；Coupled capacitor end thereof contacts send out device, and the other end connects with one end of first resistor；The other end of first resistor one end respectively with second resistance, the base stage of triode connect；The other end ground connection of second resistance, the grounded emitter of triode.Using the high current high frequency LD pulse driving circuits of low-power consumption proposed by the present invention, power consumption can be reduced, while improving the repetition rate for the pulse that laser diode is sent.
Description
Technical field
The present invention relates to semiconductor circuit field, and in particular to a kind of high current high frequency LD (the LASER DIODE of low-power consumption
Laser diode) pulse driving circuit.
Background technology
LD pulse driving circuits of the prior art as shown in figure 1, its mainly include triode B11, charging capacitor C11,
Laser diode LD, coupled capacitor C12 and resistance R11, resistance R12, resistance R13 etc..When trigger signal TRIGGER is not arrived
Before coming, triode B11 cut-offs, 200V high pressures are charged by resistance R11 to charging capacitor C11, until charging capacitor C11 reaches
200V, whole circuit reaches stable state；When trigger signal TRIGGER arrives, triode ON is just filled on charging capacitor C11
Electricity discharged by triode B11, produce pulse high current, so as to drive laser diode LD to send high power pulse, arteries and veins
Rush width general in 10ns~20ns or so.
This is typical linear drive circuit.When triode B11 is turned on, the pulse discharged except charging capacitor C11
Outside electric current is by triode B11, also 200V high voltage power supplies can be loaded on the resistance R11 of triode B11 and series connection, this portion
It is lasting electric current to divide electric current.In order to protect triode B11 not to be burned out, resistance R11 value typically obtains very big in engineering
(3kOhms~10kOhms).But, due to being series connection, then most voltage can be also added on resistance R11, and this is just
The power consumption that result in resistance R11 is especially big, so as to the repetition rate of the pulsed light of laser diode LD can not be improved, also causes
The pulse driving circuit of this structure is limited to very much.
Generally, the major defect of this Linear Driving is that, high pressure can directly add when triode B11 is turned on
On path, so as to cause power consumption excessive.
The content of the invention
For the problem of power consumption is excessive in the prior art, the present invention proposes a kind of high current high frequency LD pulses of low-power consumption
Drive circuit.
A kind of high current high frequency LD pulse driving circuits of low-power consumption proposed by the present invention, it includes Switching Power Supply, transformation
Device, counnter attack diode, the first triode, charging capacitor, coupled capacitor, first resistor, second resistance, laser diode, triggering
Device；
The Switching Power Supply is connected to the primary side input of the transformer, and the secondary output of the transformer is connected to the counnter attack
The anode of diode, the negative electrode of the counnter attack diode is connected to the colelctor electrode of first triode；
The end of charging capacitor one is connected to the colelctor electrode of first triode, another to be terminated at the laser diode
Negative electrode, the plus earth of the laser diode；
The coupled capacitor end thereof contacts send out device, and the other end connects with one end of the first resistor；The first resistor
Other end one end respectively with the second resistance, the base stage of first triode connects；The second resistance it is another
End ground connection, the grounded emitter of first triode.
Optionally, the Switching Power Supply includes pulse width modulator, switch driver, FET and voltage source；
The pulse width modulator and switch driver electrical connection are followed by the grid of the FET, the field effect
Should pipe drain electrode be connected to the negative pole of the voltage source, the positive pole of the voltage source is connected to the primary side input positive terminal of the transformer, institute
State the primary side input negative terminal that FET source electrode is connected to the transformer.
Optionally, the Switching Power Supply includes pulse width modulator, switch driver, the second triode and voltage source；
The pulse width modulator and switch driver electrical connection are followed by the base stage of second triode, and described the
The colelctor electrode of two triodes is connected to the negative pole of the voltage source, and the positive pole of the voltage source is connected to the primary side input of the transformer
Anode, the emitter stage of second triode is connected to the primary side input negative terminal of the transformer.
Optionally, the trigger includes trigger element and triode driver, the two electrical connection.
Optionally, the voltage source is 5V voltage sources.
In addition, the present invention also proposes the high current high frequency LD pulse driving circuits of another low-power consumption, it includes switch electricity
Source, transformer, counnter attack diode, the first FET, charging capacitor, coupled capacitor, first resistor, second resistance, laser two
Pole pipe, trigger；
The Switching Power Supply is connected to the primary side input of the transformer, and the secondary output of the transformer is connected to the counnter attack
The anode of diode, the negative electrode of the counnter attack diode is connected to the drain electrode of first FET；
The end of charging capacitor one is connected to the drain electrode of first FET, another to be terminated at the laser diode
Negative electrode, the plus earth of the laser diode；
The coupled capacitor end thereof contacts send out device, and the other end connects with one end of the first resistor；The first resistor
Other end one end respectively with the second resistance, the grid of first FET connects；The second resistance it is another
One end is grounded, the source ground of first FET.
Optionally, the Switching Power Supply includes pulse width modulator, switch driver, the second FET and voltage source；
The pulse width modulator and switch driver electrical connection are followed by the grid of second FET, described
Second FET, which drains, is connected to the negative pole of the voltage source, and the positive pole of the voltage source is connected to the primary side input of the transformer
Anode, the second FET source electrode is connected to the primary side input negative terminal of the transformer.
Optionally, the Switching Power Supply includes pulse width modulator, switch driver, triode and voltage source；
The pulse width modulator and switch driver electrical connection are followed by the base stage of the triode, the triode
Colelctor electrode be connected to the negative pole of the voltage source, the positive pole of the voltage source is connected to the primary side input positive terminal of the transformer, institute
The emitter stage for stating triode is connected to the primary side input negative terminal of the transformer.
Optionally, the trigger includes trigger element and EFT Drive Unit, the two electrical connection.
Optionally, the voltage source is 5V voltage sources.
Beneficial effect：A kind of high current high frequency LD pulse driving circuits of low-power consumption proposed by the present invention, its Switching Power Supply
For providing input voltage for transformer to be converted into the output voltage of transformer, and the frequency of control voltage device output voltage,
The low pressure that transformer is used to input Switching Power Supply changes into required High voltage output；Counnter attack diode is used for when transformer output
When voltage declines, the voltage of charging capacitor is kept；When transformer output voltage is 0, it can be led by trigger trigger triode
It is logical, charging capacitor is discharged, at this moment because transformer output voltage is 0 and counnter attack diode has anti-reaction, only charge
The electricity of electric capacity is loaded directly into triode path by triode, linear drive circuit compared with prior art, no high pressure
On, greatly reduce power consumption.
Brief description of the drawings
Fig. 1 is the principle schematic of LD pulse driving circuits in the prior art.
Fig. 2 is a kind of high current high frequency LD pulse driving circuit embodiment first scheme of low-power consumption proposed by the present invention
Principle schematic.
Embodiment
For the ease of it will be appreciated by those skilled in the art that being carried out below in conjunction with accompanying drawing and embodiment to the present invention further
Description.
The high current high frequency LD pulse driving circuits embodiment that the present invention proposes a kind of low-power consumption can at least be related to two
Different schemes are planted, are described respectively below according to different schemes.
A kind of high current high frequency LD pulse driving circuits for low-power consumption that first scheme is proposed are as follows.
Referring to Fig. 2, a kind of high current high frequency LD pulse driving circuits for low-power consumption that first scheme is proposed, it includes out
Powered-down source, transformer T1, counnter attack diode D1 (are only to be named according to its effect here, actually D1 can use common two pole
Pipe), the first triode B1, charging capacitor C1, coupled capacitor C2, first resistor R1, second resistance R2, laser diode
LD, trigger；
The Switching Power Supply is connected to the primary side input of the transformer T1, and the secondary output of the transformer T1 is connected to described
Counnter attack diode D1 anode, the negative electrode of the counnter attack diode D1 is connected to the colelctor electrode of the first triode B1；
The ends of charging capacitor C1 mono- are connected to the colelctor electrode of the first triode B1, another to be terminated at the pole of laser two
Pipe LD negative electrode, the plus earth of the laser diode LD；
The coupled capacitor C2 end thereof contacts send out device, and the other end connects with one end of the first resistor R1；Described first
Resistance R1 other end one end respectively with the second resistance R2, the base stage of the first triode B1 connect；Described second
Resistance R2 other end ground connection, the grounded emitter of the first triode B1.
A kind of high current high frequency LD pulse driving circuits for low-power consumption that first scheme is proposed, its Switching Power Supply is used to become
Depressor T1 provides input voltage to be converted into transformer T1 output voltage, and the frequency of control voltage device T1 output voltages, becomes
The low pressure that depressor T1 is used to input Switching Power Supply changes into required High voltage output；Counnter attack diode D1 is used to work as transformer T1
When output voltage declines, charging capacitor C1 voltage is kept；When transformer T1 output voltages are 0, it can be triggered by trigger
First triode B1 is turned on, and charging capacitor C1 is discharged, at this moment because transformer T1 output voltages have for 0 and counnter attack diode D1
There is anti-reaction, only charging capacitor C1 electricity passes through triode, linear drive circuit compared with prior art, without high pressure
It is loaded directly on the first triode B1 path, greatly reduces power consumption.
Further, since power consumption is reduced in first scheme, while reducing the release of heat so that laser diode LD two
Interval between subpulse is shortened, thus can greatly improve the repetition rate of pulse.
In order to be better achieved in the technique effect of first scheme, the present embodiment also to the Switching Power Supply in first scheme
Particular circuit configurations are defined, and can specifically have two kinds of circuit structures, i.e., realized using FET switching function and
Realize that switching function (for convenience of quoting from, is referred to switch K1 in Fig. 2 and existed including FET and triode using triode
It is interior any to realize the element of on-off action).
Please continue to refer to Fig. 2, circuit structure one：The Switching Power Supply include pulse width modulator PWM, switch driver (
Here can be specifically EFT Drive Unit, i.e. MOSFET DRIVER), FET (at this moment, in Fig. 2 with switch K1 it is visual
Make a FET) and voltage source S1；
Pulse width modulator PWM and the switch driver electrical connection is followed by the grid of the FET, described
FET, which drains, is connected to the negative pole of the voltage source S1, and the primary side that the positive pole of the voltage source S1 is connected to the transformer T1 is defeated
Enter anode, the FET source electrode is connected to the primary side input negative terminal of the transformer T1.
Equally refer to Fig. 2, circuit structure two：The Switching Power Supply includes pulse width modulator PWM, switch driver (at this
In can be specifically triode driver), the second triode (at this moment, the switch K1 in Fig. 2 can be regarded as a triode) and
Voltage source S1；
Pulse width modulator PWM and the switch driver electrical connection is followed by the base stage of second triode, institute
The colelctor electrode for stating the second triode is connected to the negative pole of the voltage source S1, and the positive pole of the voltage source S1 is connected to the transformer T1
Primary side input positive terminal, the emitter stage of second triode is connected to the primary side input negative terminal of the transformer T1.
In order to which the tool in the technique effect of first scheme, the present embodiment also to the trigger in first scheme is better achieved
Body circuit structure is defined, referring to Fig. 2, the trigger includes trigger element TRIGGER and triode driver, two
Person electrically connects.Trigger element TRIGGER is mainly used in providing trigger signal, and triode driver is mainly used in driving described first
Triode B1 is turned on.In addition, in first scheme, the voltage source S1 can be that for 5V voltage sources, the 5V voltages of output are according to change
Depressor T1 former secondary no-load voltage ratio is changed, it is possible to achieve the high pressure required in circuit.
A kind of high current high frequency LD pulse driving circuits for low-power consumption that alternative plan is proposed belong to same with the first scheme
One inventive concept, institute's difference, being only that first scheme is realized based on the first triode B1, by first in alternative plan
Triode B1 has changed FET into, is specifically described that (alternative plan also see Fig. 2, only by the therein 1st below
Pole pipe B1 regards FET as).
A kind of high current high frequency LD pulse driving circuits for low-power consumption that alternative plan is proposed, it includes Switching Power Supply, change
Depressor, counnter attack diode, the first FET, charging capacitor, coupled capacitor, first resistor, second resistance, laser diode,
Trigger；
The Switching Power Supply is connected to the primary side input of the transformer, and the secondary output of the transformer is connected to the counnter attack
The anode of diode, the negative electrode of the counnter attack diode is connected to the drain electrode of first FET；
The end of charging capacitor one is connected to the drain electrode of first FET, another to be terminated at the laser diode
Negative electrode, the plus earth of the laser diode；
The coupled capacitor end thereof contacts send out device, and the other end connects with one end of the first resistor；The first resistor
Other end one end respectively with the second resistance, the grid of first FET connects；The second resistance it is another
One end is grounded, the source ground of first FET.
Alternative plan is similar with first scheme, thus alternative plan can equally reduce power consumption, while improving the pole of laser two
The repetition rate for the pulse that pipe is sent.
It is same to the Switching Power Supply in alternative plan in order to be better achieved in the technique effect of alternative plan, the present embodiment
Particular circuit configurations be defined, specifically can equally have two kinds of circuit structures, i.e., switch is realized using FET
Function and realize switching function using triode.
Circuit structure one：The Switching Power Supply includes pulse width modulator, switch driver, the second FET and voltage
Source；
The pulse width modulator and switch driver electrical connection are followed by the grid of second FET, described
Second FET, which drains, is connected to the negative pole of the voltage source, and the positive pole of the voltage source is connected to the primary side input of the transformer
Anode, the second FET source electrode is connected to the primary side input negative terminal of the transformer.
Circuit structure two：The Switching Power Supply includes pulse width modulator, switch driver, triode and voltage source；
The pulse width modulator and switch driver electrical connection are followed by the base stage of the triode, the triode
Colelctor electrode be connected to the negative pole of the voltage source, the positive pole of the voltage source is connected to the primary side input positive terminal of the transformer, institute
The emitter stage for stating triode is connected to the primary side input negative terminal of the transformer.
In order to which the tool in the technique effect of alternative plan, the present embodiment also to the trigger in alternative plan is better achieved
Body circuit structure is defined, and the trigger includes trigger element and EFT Drive Unit, the two electrical connection.Field-effect
Pipe driver is mainly used in driving the FET to turn on.In addition, in alternative plan, the voltage source can be for 5V voltages
Source, the 5V voltages of output are changed according to the former secondary no-load voltage ratio of transformer, it is possible to achieve the high pressure required in circuit.
The two schemes provided in the present embodiment can reduce power consumption, while improving the weight for the pulse that laser diode is sent
Complex frequency, as long as the selection of each element is appropriate, can export the pulse of 500kHz repetition rates, pulse width 15ns, pulse peak
It is worth electric current 30A.And higher repetition rate is realized, the present embodiment can be made to be more suitable for applying in fast laser ranging scanning.
Embodiment described above only expresses the several embodiments of the present invention, and it describes more specific and detailed, but simultaneously
Therefore the limitation to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the guarantor of the present invention
Protect scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. the high current high frequency LD pulse driving circuits of a kind of low-power consumption, it is characterised in that including Switching Power Supply, transformer, prevent
Anti- diode, the first triode, charging capacitor, coupled capacitor, first resistor, second resistance, laser diode, trigger；
The Switching Power Supply is connected to the primary side input of the transformer, and the secondary output of the transformer is connected to the pole of counnter attack two
The anode of pipe, the negative electrode of the counnter attack diode is connected to the colelctor electrode of first triode；
The end of charging capacitor one is connected to the colelctor electrode of first triode, another the moon for being terminated at the laser diode
Pole, the plus earth of the laser diode；
The coupled capacitor end thereof contacts send out device, and the other end connects with one end of the first resistor；The first resistor it is another
One end one end respectively with the second resistance, the base stage of first triode connect；Another termination of the second resistance
Ground, the grounded emitter of first triode.
2. the high current high frequency LD pulse driving circuits of low-power consumption according to claim 1, it is characterised in that the switch
Power supply includes pulse width modulator, switch driver, FET and voltage source；
The pulse width modulator and switch driver electrical connection are followed by the grid of the FET, the FET
Drain electrode is connected to the negative pole of the voltage source, and the positive pole of the voltage source is connected to the primary side input positive terminal of the transformer, the field
Effect pipe source electrode is connected to the primary side input negative terminal of the transformer.
3. the high current high frequency LD pulse driving circuits of low-power consumption according to claim 1, it is characterised in that the switch
Power supply includes pulse width modulator, switch driver, the second triode and voltage source；
The pulse width modulator and switch driver electrical connection are followed by the base stage of second triode, the described 2nd 3
The colelctor electrode of pole pipe is connected to the negative pole of the voltage source, and the positive pole of the voltage source is being connected to the primary side input of the transformer just
End, the emitter stage of second triode is connected to the primary side input negative terminal of the transformer.
4. the high current high frequency LD pulse driving circuits of the low-power consumption according to Claims 2 or 3, it is characterised in that described
Trigger includes trigger element and triode driver, the two electrical connection.
5. the high current high frequency LD pulse driving circuits of the low-power consumption according to Claims 2 or 3, it is characterised in that described
Voltage source is 5V voltage sources.
6. the high current high frequency LD pulse driving circuits of a kind of low-power consumption, it is characterised in that including Switching Power Supply, transformer, prevent
Anti- diode, the first FET, charging capacitor, coupled capacitor, first resistor, second resistance, laser diode, trigger；
The Switching Power Supply is connected to the primary side input of the transformer, and the secondary output of the transformer is connected to the pole of counnter attack two
The anode of pipe, the negative electrode of the counnter attack diode is connected to the drain electrode of first FET；
The end of charging capacitor one is connected to the drain electrode of first FET, another the moon for being terminated at the laser diode
Pole, the plus earth of the laser diode；
The coupled capacitor end thereof contacts send out device, and the other end connects with one end of the first resistor；The first resistor it is another
One end one end respectively with the second resistance, the grid of first FET connect；The other end of the second resistance
Ground connection, the source ground of first FET.
7. the high current high frequency LD pulse driving circuits of low-power consumption according to claim 6, it is characterised in that the switch
Power supply includes pulse width modulator, switch driver, the second FET and voltage source；
The pulse width modulator and switch driver electrical connection are followed by the grid of second FET, described second
FET, which drains, is connected to the negative pole of the voltage source, and the positive pole of the voltage source is being connected to the primary side input of the transformer just
End, the second FET source electrode is connected to the primary side input negative terminal of the transformer.
8. the high current high frequency LD pulse driving circuits of low-power consumption according to claim 6, it is characterised in that the switch
Power supply includes pulse width modulator, switch driver, triode and voltage source；
The pulse width modulator and switch driver electrical connection are followed by the base stage of the triode, the collection of the triode
Electrode is connected to the negative pole of the voltage source, and the positive pole of the voltage source is connected to the primary side input positive terminal of the transformer, described three
The emitter stage of pole pipe is connected to the primary side input negative terminal of the transformer.
9. the high current high frequency LD pulse driving circuits of the low-power consumption according to claim 7 or 8, it is characterised in that described
Trigger includes trigger element and EFT Drive Unit, the two electrical connection.
10. the high current high frequency LD pulse driving circuits of the low-power consumption according to claim 7 or 8, it is characterised in that described
Voltage source is 5V voltage sources.
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| CN201410728336.XA CN104466667B (en) | 2014-12-03 | 2014-12-03 | A kind of high current high frequency LD pulse driving circuits of low-power consumption |
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| CN201410728336.XA CN104466667B (en) | 2014-12-03 | 2014-12-03 | A kind of high current high frequency LD pulse driving circuits of low-power consumption |
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| CN103166443A (en) * | 2011-12-12 | 2013-06-19 | 海洋王照明科技股份有限公司 | Soft start control circuit and constant flow source drive circuit |
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