CN207835873U - A kind of SLD light sources drive integrated circult - Google Patents
A kind of SLD light sources drive integrated circult Download PDFInfo
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- CN207835873U CN207835873U CN201820160319.4U CN201820160319U CN207835873U CN 207835873 U CN207835873 U CN 207835873U CN 201820160319 U CN201820160319 U CN 201820160319U CN 207835873 U CN207835873 U CN 207835873U
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- light sources
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Abstract
The utility model discloses a kind of SLD light sources drive integrated circults, including SLD light sources, temperature control circuit, constant-current source circuit, voltage-reference and for the power supply of power supply, the SLD light source internals are provided with thermistor and refrigerator for monitoring temperature, the temperature control circuit is connected to control SLD light source internal temperature with thermistor and refrigerator, the constant-current source circuit is connected with luminescence chip for providing stable electric current, and the voltage-reference is connected to provide reference voltage with temperature control circuit, constant-current source circuit.The utility model provides constant driving current to SLD light sources by constant-current source circuit, and the operating temperature of SLD light sources is controlled by temperature control circuit, can effectively stablize the output power of SLD light sources, extends the service life of SLD light sources.
Description
Technical field
The utility model is related to light source drive area, especially a kind of SLD light sources drive integrated circult.
Background technology
Super-radiance light emitting diode (SLD) is the perfect light source of interference type optical fiber gyroscope.By Primary Component transformation approach it is found that
SLD light sources are the key core device of optical fibre gyro simultaneously.By the introduction of the operation principle to optical fibre gyro (FOG) and
The architectural characteristic fishing operation principle of SLD light sources elaborates, and analyzes its important function on fibre optic gyroscope.Then
Retell influence of the bright SLD light sources main characteristic parameters to fiber optic gyroscope performance, it is indicated that SLD light sources optical fibre gyro using it is upper not
Carry out research emphasis, provides fundamental basis for work sutdies such as the research of future SLD light sources and related reliability evaluation tests.
Since the Output optical power of SLD light sources enhances with the increase of the driving current of luminescence chip, also, so in order to
The light source of power invariability is obtained, the luminescence chip being just necessary in SLD light sources provides constant driving current.
In addition when luminescence chip work in SLD light sources, die temperature can rise rapidly, and the power of output light can be with
The rising of die temperature and decline, centre wavelength can be also varied from.So in order to obtain power invariability and centre wavelength is constant
Light source, it is necessary to the die temperature for controlling SLD light sources makes to work at a constant temperature at luminescence chip.
Therefore in order to make the power invariability of SLD light source outputs, constant driving current should be provided, controls SLD light again
The operating temperature in source, currently without suitable integrated circuit.
Utility model content
To solve the above-mentioned problems, the purpose of this utility model be to provide it is a kind of can provide constant driving current and
The SLD light source drive integrated circults of the operating temperature of SLD light sources can effectively be controlled.
The technical solution adopted in the utility model is：
A kind of SLD light sources drive integrated circult, including SLD light sources, temperature control circuit, constant-current source circuit, voltage-reference and
For the power supply of power supply, the SLD light source internals are provided with thermistor and refrigerator, and the temperature control circuit is electric with temperature-sensitive respectively
Resistance, refrigerator are connected for controlling SLD light source internal temperature, and the constant-current source circuit is connected to provide with luminescence chip
Stable electric current, the voltage-reference are connected to provide reference voltage with temperature control circuit, constant-current source circuit.
Further, the refrigerator use semiconductor thermoelectric refrigeration device, the temperature circuit include voltage-reference U1,
Operational amplifier U2A, operational amplifier U2B, operational amplifier U2C and power driver module D1, the power driver module D1
Output end OUT1 be connected with the pin TEC- of semiconductor thermoelectric refrigeration device, another output end OUT2 of power driver module D1 with
The pin TEC+ of semiconductor thermoelectric refrigeration device is connected, for driving semiconductor thermoelectric refrigeration device work；Power driver module D1
Input terminal IN1 be connected with the output end of operational amplifier U2C；
The pin TEC- phases that the inverting input of the operational amplifier U2C passes through resistance R7 and semiconductor thermoelectric refrigeration device
Even, the inverting input of operational amplifier U2C is connected by resistance R8 with the pin TEC+ of semiconductor thermoelectric refrigeration device, and operation is put
The in-phase input end of big device U2C is connected with the in-phase input end of operational amplifier U2B, the output end of the operational amplifier U2B
It is connected with another input terminal IN2 of power driver module D1, inverting input and the operational amplifier U2A of operational amplifier U2B
Output end be connected；The output end of the operational amplifier U2A is connected with the pin RT+ of thermistor, operational amplifier U2A's
Inverting input is connected with the pin RT- of thermistor, for monitoring the temperature of SLD light source internals, the voltage-reference
The output end EOUT of U1 is connected with the in-phase input end of operational amplifier U2C.
Further, between the in-phase input end and the in-phase input end of operational amplifier U2B of the operational amplifier U2C
It is provided with resistance R5, the in-phase input end phase that the in-phase input end of operational amplifier U2C passes through resistance R1 and operational amplifier U2A
Even, the in-phase input end of the operational amplifier U2A is grounded by resistance R2, and the inverting input of operational amplifier U2A passes through
Resistance R3 ground connection, the output end of operational amplifier U2A are connected by capacitance C11 with the inverting input of operational amplifier U2A.
Further, it is arranged between the inverting input and the output end of operational amplifier U2A of the operational amplifier U2B
There are resistance R4, the inverting input of operational amplifier U2B to be driven by capacitance C6, resistance R6, resistance R31 and the power being sequentially connected in series
The output end OUT2 of dynamic model block D1 is connected, and the both ends the resistance R6 are parallel with the both ends capacitance C7, the resistance R31 and are parallel with capacitance
The common end of C12, resistance R6 and resistance R31 are connected by capacitance C13, the resistance R30 being sequentially connected in series with ground terminal.
Further, it is arranged between the in-phase input end of operational amplifier U2C and the in-phase input end of operational amplifier U2B
There are the common end of resistance R5, operational amplifier U2C and voltage-reference U1 to pass through capacitance C3 in parallel and capacitance C4 ground connection.
Further, the constant-current source circuit includes operational amplifier U3A, current amplifier, resistance R25 and resistance R15,
The input terminal of the current amplifier is connected with the anode of power supply, and the output end of current amplifier passes through resistance R25 and SLD light sources
The ends LD+ be connected, the control terminal of current amplifier is connected with the output end of operational amplifier U3A, the operational amplifier U3A's
In-phase input end is grounded, and the inverting input of operational amplifier U3A is connected with the ends LD- of SLD light sources, operational amplifier U3A's
Inverting input is connected with one end of resistance R15, the other end ground connection of resistance R15, the output end of the voltage-reference U1
EOUT is connected by resistance R11 with the in-phase input end of operational amplifier U3A.
Further, the current amplifier uses collector and the positive pole phase of triode Q9, the triode Q9
Even, the emitter of triode Q9 is connected by resistance R25 with the ends LD+ of SLD light sources, the base stage and operational amplifier of triode Q9
Output end be connected.
Further, inductance L1 and resistance R13 are connected between the positive pole and the collector of triode Q9 in turn,
The common end of the resistance R13 and the collector of triode Q9 are grounded by capacitance C9, and the collector of triode Q9 passes through resistance
R29 is connected with base stage, and resistance R28 is provided between the base stage of triode Q9 and the output end of operational amplifier.
Wherein, the output end of the operational amplifier is connected by capacitance C10 with inverting input.
Wherein, it is arranged between the resistance R15 and the common end at the ends LD- and the output end of operational amplifier of SLD light sources
There is resistance R26.
The beneficial effects of the utility model：
The utility model provides constant driving current to SLD light sources by constant-current source circuit, is controlled by temperature control circuit
The operating temperature of SLD light sources can effectively stablize the output power of SLD light sources, extend the service life of SLD light sources.
Description of the drawings
Specific embodiment of the present utility model is described further below in conjunction with the accompanying drawings；
Fig. 1 is the circuit diagram of the utility model SLD light source drive integrated circults；
Fig. 2 is the work flow diagram of the utility model temperature control circuit；
Fig. 3 is the functional block diagram of the utility model constant-current source circuit；
Fig. 4 is the pinouts of the utility model SLD light sources.
Specific implementation mode
It is a kind of SLD light sources drive integrated circult of the utility model, including SLD light sources, temperature control electricity as Figure 1-Figure 4
Road, constant-current source circuit, voltage-reference and the power supply for power supply, SLD light source internals are provided with the temperature-sensitive for monitoring temperature
Resistance and refrigerator, temperature control circuit are connected to control SLD light source internal temperature, constant current respectively with thermistor, refrigerator
Source circuit is connected with luminescence chip for providing stable electric current, and voltage-reference is connected with temperature control circuit, constant-current source circuit
For providing reference voltage.
Preferably, refrigerator uses semiconductor thermoelectric refrigeration device, the refrigerator that other can also be used conventional；Temperature circuit
Including voltage-reference U1, operational amplifier U2A, operational amplifier U2B, operational amplifier U2C and power driver module D1, work(
The output end OUT1 of rate drive module D1 is connected with the pin TEC- of semiconductor thermoelectric refrigeration device, and power driver module D1's is another
Output end OUT2 is connected with the pin TEC+ of semiconductor thermoelectric refrigeration device, for driving semiconductor thermoelectric refrigeration device work；Work(
The input terminal IN1 of rate drive module D1 is connected with the output end of operational amplifier U2C；
The inverting input of operational amplifier U2C is connected by resistance R7 with the pin TEC- of semiconductor thermoelectric refrigeration device,
The inverting input of operational amplifier U2C is connected by resistance R8 with the pin TEC+ of semiconductor thermoelectric refrigeration device, operation amplifier
The in-phase input end of device U2C is connected with the in-phase input end of operational amplifier U2B, the output end and power of operational amplifier U2B
Another input terminal IN2 of drive module D1 is connected, the output of the inverting input and operational amplifier U2A of operational amplifier U2B
End is connected；The output end of operational amplifier U2A is connected with the pin RT+ of thermistor, the inverting input of operational amplifier U2A
It is connected with the pin RT- of thermistor, for monitoring the temperature of SLD light source internals, the output end EOUT of voltage-reference U1
It is connected with the in-phase input end of operational amplifier U2C.
It is provided with resistance R5 between the in-phase input end and the in-phase input end of operational amplifier U2B of operational amplifier U2C,
The in-phase input end of operational amplifier U2C is connected by resistance R1 with the in-phase input end of operational amplifier U2A, operational amplifier
The in-phase input end of U2A is grounded by resistance R2, and the inverting input of operational amplifier U2A is grounded by resistance R3, and operation is put
The output end of big device U2A is connected by capacitance C11 with the inverting input of operational amplifier U2A.
Wherein, it is provided with resistance between the inverting input of operational amplifier U2B and the output end of operational amplifier U2A
The inverting input of R4, operational amplifier U2B pass through the capacitance C6, resistance R6, resistance R31 and the power driver module that are sequentially connected in series
The output end OUT2 of D1 is connected, and the both ends resistance R6 are parallel with capacitance C7, and the both ends resistance R31 are parallel with capacitance C12, resistance R6 and electricity
The common end of resistance R31 is connected by capacitance C13, the resistance R30 being sequentially connected in series with ground terminal.
It is provided with resistance R5 between the in-phase input end and the in-phase input end of operational amplifier U2B of operational amplifier U2C,
The common end of operational amplifier U2C and voltage-reference U1 pass through capacitance C3 in parallel and capacitance C4 ground connection.
The constant-current source circuit for providing constant current includes operational amplifier U3A, current amplifier, resistance R25 and resistance
R15, the input terminal of current amplifier are connected with the anode of power supply, and the output end of current amplifier passes through resistance R25 and SLD light sources
The ends LD+ be connected, the control terminal of current amplifier is connected with the output end of operational amplifier U3A, the same phase of operational amplifier U3A
Input end grounding, the inverting input of operational amplifier U3A are connected with the ends LD- of SLD light sources, the reverse phase of operational amplifier U3A
Input terminal is connected with one end of resistance R15, and the other end ground connection of resistance R15, the output end EOUT of voltage-reference U1 passes through electricity
Resistance R11 is connected with the in-phase input end of operational amplifier U3A.
Wherein, current amplifier uses triode Q9, the collector of triode Q9 to be connected with positive pole, triode Q9's
Emitter is connected by resistance R25 with the ends LD+ of SLD light sources, and the base stage of triode Q9 is connected with the output end of operational amplifier.
It is connected with inductance L1 and resistance R13, resistance R13 and three poles between positive pole and the collector of triode Q9 in turn
The common end of the collector of pipe Q9 is grounded by capacitance C9, and the collector of triode Q9 is connected by resistance R29 with base stage, three poles
Resistance R28 is provided between the base stage of pipe Q9 and the output end of operational amplifier.The output end of operational amplifier passes through capacitance C10
It is connected with inverting input.It is arranged between the common end at the ends LD- and the output end of operational amplifier of resistance R15 and SLD light source
There is resistance R26.
P1~P13 is reserved pin in Fig. 1, and+5V and GND are power input.
Constant-current source circuit puts the voltage of voltage-reference and the cathode voltage input operation of SLD light sources in the utility model
Big device carries out operation, then carries out Current amplifier by triode Q9, SLD light sources can be given to provide stable electric current, keep SLD
The constant light source of luminescence chip output power in light source.Temperature control circuit is using the thermistor of SLD power source internals encapsulation to tube core
Temperature is monitored and exports, and operational amplifier is partly led according to the difference of thermistor resistance value by power control module control
Body thermoelectric cooler works, and the temperature that can control SLD light sources increases, and further stablizes the output power of SLD light sources, effectively prolongs
The service life of long SLD light sources.
Wherein, as shown in Figure 1, when testing whether constant-current source circuit works normally in the utility model, SLD light sources are available
Light emitting diode V1 is replaced, and the electric current I of constant-current source is equal to operational amplifier in-phase input end reference voltage divided by R15, i.e. I=
497.6mV/5.1 Ω=97.6mA.R25 both end voltages are tested with multimeter, if voltage is 97.6mV or so, illustrate constant-current source
Circuit is working properly.
When testing whether temperature control circuit works normally in the utility model, the thermistor RT of light source SLD is in room temperature 20
It is 10k near DEG C, temperature control circuit is stablized by controlling semiconductor thermoelectric refrigeration device, guarantee light source internal temperature at 20 DEG C or so,
Therefore test whether the resistance value at the both ends thermistor RT is 10k by multimeter, to confirm whether the temperature control circuit is working properly；
Then the operating temperature (- 40 DEG C~60 DEG C) for changing light source continues to test thermistor RT resistance values, while monitoring the driving of power supply
Electric current shows that temperature control circuit is working properly if RT resistance values are maintained at 10k under -40 DEG C~60 DEG C environment.
The utility model provides constant driving current to SLD light sources by constant-current source circuit, is controlled by temperature control circuit
The operating temperature of SLD light sources can effectively stablize the output power of SLD light sources, extend the service life of SLD light sources.
The foregoing is merely the preferred embodiments of the utility model, the utility model is not limited to above-mentioned embodiment party
Formula, if with essentially identical means realize the technical solution of the utility model aim belong to the scope of protection of the utility model it
It is interior.
Claims (10)
1. a kind of SLD light sources drive integrated circult, it is characterised in that：Including SLD light sources, temperature control circuit, constant-current source circuit, voltage
A reference source and power supply for power supply, the SLD light source internals are provided with thermistor and refrigerator, the temperature control circuit difference
Be connected with thermistor, refrigerator for control SLD light source internal temperature, the constant-current source circuit be connected with luminescence chip with
For providing stable electric current, the voltage-reference is connected to provide reference voltage with temperature control circuit, constant-current source circuit.
2. SLD light sources drive integrated circult according to claim 1, it is characterised in that：The refrigerator uses semiconductor
Thermoelectric cooler, the temperature circuit include voltage-reference U1, operational amplifier U2A, operational amplifier U2B, operation amplifier
Device U2C and power driver module D1, the pin of the output end OUT1 and semiconductor thermoelectric refrigeration device of the power driver module D1
TEC- be connected, another output end OUT2 of power driver module D1 is connected with the pin TEC+ of semiconductor thermoelectric refrigeration device, with
In driving semiconductor thermoelectric refrigeration device work；The output end phase of the input terminal IN1 and operational amplifier U2C of power driver module D1
Even；
The inverting input of the operational amplifier U2C is connected by resistance R7 with the pin TEC- of semiconductor thermoelectric refrigeration device,
The inverting input of operational amplifier U2C is connected by resistance R8 with the pin TEC+ of semiconductor thermoelectric refrigeration device, operation amplifier
The in-phase input end of device U2C is connected with the in-phase input end of operational amplifier U2B, the output end of the operational amplifier U2B with
Another input terminal IN2 of power driver module D1 is connected, and the inverting input of operational amplifier U2B is with operational amplifier U2A's
Output end is connected；The output end of the operational amplifier U2A is connected with the pin RT+ of thermistor, and operational amplifier U2A's is anti-
Phase input terminal is connected with the pin RT- of thermistor, for monitoring the temperature of SLD light source internals, the voltage-reference U1
Output end EOUT be connected with the in-phase input end of operational amplifier U2C.
3. SLD light sources drive integrated circult according to claim 2, it is characterised in that：The operational amplifier U2C's is same
Resistance R5, the in-phase input end of operational amplifier U2C are provided between phase input terminal and the in-phase input end of operational amplifier U2B
It is connected with the in-phase input end of operational amplifier U2A by resistance R1, the in-phase input end of the operational amplifier U2A passes through electricity
R2 ground connection is hindered, the inverting input of operational amplifier U2A is grounded by resistance R3, and the output end of operational amplifier U2A passes through electricity
Hold C11 with the inverting input of operational amplifier U2A to be connected.
4. SLD light sources drive integrated circult according to claim 2, it is characterised in that：The operational amplifier U2B's is anti-
Resistance R4 is provided between phase input terminal and the output end of operational amplifier U2A, the inverting input of operational amplifier U2B passes through
Capacitance C6, resistance R6, the resistance R31 being sequentially connected in series are connected with the output end OUT2 of power driver module D1, the resistance R6 two
End is parallel with the both ends capacitance C7, the resistance R31 and is parallel with the common end of capacitance C12, resistance R6 and resistance R31 by going here and there successively
Capacitance C13, the resistance R30 of connection are connected with ground terminal.
5. SLD light sources drive integrated circult according to claim 2, it is characterised in that：Operational amplifier U2C's is same mutually defeated
Enter and is provided with resistance R5 between end and the in-phase input end of operational amplifier U2B, operational amplifier U2C and voltage-reference U1's
Common end passes through capacitance C3 in parallel and capacitance C4 ground connection.
6. SLD light sources drive integrated circult according to claim 1, it is characterised in that：The constant-current source circuit includes fortune
Calculate amplifier U3A, current amplifier, resistance R25 and resistance R15, the input terminal of the current amplifier and the positive phase of power supply
Even, the output end of current amplifier is connected by resistance R25 with the ends LD+ of SLD light sources, the control terminal of current amplifier and operation
The output end of amplifier U3A is connected, the in-phase input end ground connection of the operational amplifier U3A, and the reverse phase of operational amplifier U3A is defeated
Enter end with the ends LD- of SLD light sources to be connected, the inverting input of operational amplifier U3A is connected with one end of resistance R15, resistance R15
Other end ground connection, the homophase input that the output end EOUT of the voltage-reference U1 passes through resistance R11 and operational amplifier U3A
End is connected.
7. SLD light sources drive integrated circult according to claim 6, it is characterised in that：The current amplifier uses three
Pole pipe Q9, the collector of the triode Q9 are connected with positive pole, and the emitter of triode Q9 passes through resistance R25 and SLD light
The ends LD+ in source are connected, and the base stage of triode Q9 is connected with the output end of operational amplifier.
8. SLD light sources drive integrated circult according to claim 6, it is characterised in that：The positive pole and triode
It is connected with the common end of the collector of inductance L1 and resistance R13, the resistance R13 and triode Q9 between the collector of Q9 in turn
It is grounded by capacitance C9, the collector of triode Q9 is connected by resistance R29 with base stage, the base stage and operation amplifier of triode Q9
Resistance R28 is provided between the output end of device.
9. SLD light sources drive integrated circult according to claim 6, it is characterised in that：The output of the operational amplifier
End is connected by capacitance C10 with inverting input.
10. SLD light sources drive integrated circult according to claim 6, it is characterised in that：The resistance R15 and SLD light sources
The common end at the ends LD- and the output end of operational amplifier between be provided with resistance R26.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820160319.4U CN207835873U (en) | 2018-01-30 | 2018-01-30 | A kind of SLD light sources drive integrated circult |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820160319.4U CN207835873U (en) | 2018-01-30 | 2018-01-30 | A kind of SLD light sources drive integrated circult |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207835873U true CN207835873U (en) | 2018-09-07 |
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ID=63395789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820160319.4U Active CN207835873U (en) | 2018-01-30 | 2018-01-30 | A kind of SLD light sources drive integrated circult |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207835873U (en) |
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2018
- 2018-01-30 CN CN201820160319.4U patent/CN207835873U/en active Active
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