CN207802480U - A kind of light source voltage closed loop control module - Google Patents
A kind of light source voltage closed loop control module Download PDFInfo
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- CN207802480U CN207802480U CN201820136168.9U CN201820136168U CN207802480U CN 207802480 U CN207802480 U CN 207802480U CN 201820136168 U CN201820136168 U CN 201820136168U CN 207802480 U CN207802480 U CN 207802480U
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Abstract
The utility model discloses a kind of light source voltage control module, light source voltage control module includes：Voltage conversion circuit and constant-voltage control circuit；Voltage conversion circuit, the predeterminated voltage for being converted into DC voltage needed for light source；Constant-voltage control circuit, including negative-feedback circuit and Pwm controller；Negative-feedback circuit is respectively connected with, the working frequency for configuring Pwm controller with the compensation node pin and Voltage Feedback pin of Pwm controller；Pwm controller, it is connected with voltage conversion circuit, working frequency work for being configured according to negative-feedback circuit, the voltage to convert the voltage into circuit reality output are adjusted in the preset range on the basis of the predeterminated voltage, and by the Voltage Feedback after adjustment to voltage conversion circuit.It is Pwm controller configuration work frequency by negative-feedback circuit, so that Pwm controller can export stable voltage in the utility model embodiment.
Description
Technical field
The utility model is related to light source control technology, espespecially a kind of light source voltage closed loop control module.
Background technology
In the related art, DC voltage is converted into the predeterminated voltage needed for spectroscopic light source by voltage conversion circuit
When, due to the influence of environment temperature or other factors, the voltage of voltage conversion circuit reality output is not equal to spectroscopic light source institute
The predeterminated voltage needed, the voltage of voltage conversion circuit reality output is highly unstable in other words, in the fluctuation up and down of predeterminated voltage,
Fluctuating range is bigger.For example, it is 10V to be exported at normal temperatures to the voltage of spectroscopic light source, it is defeated when in the environment of 100 DEG C
Go out and changes between 8V-9V to the voltage of spectroscopic light source.If the voltage using the voltage conversion circuit reality output is light source
Power supply sends out spectrum, and the luminous power of light source can be caused unstable, spectrometer when the spectrum that is sent out to light source carries out DATA REASONING,
The baseline of spectrometer background data can drift about, and the multivariate calibration model of spectrum can be caused to fail when serious, spectrometer is final
The result of test is inaccurate.
Utility model content
The utility model embodiment provides a kind of light source voltage closed loop control module, can ensure defeated under high temperature environment
It is stable to go out to the voltage of spectroscopic light source.
In order to reach the utility model aim, the utility model provides a kind of light source voltage closed loop control module, including：
Voltage conversion circuit and constant-voltage control circuit；Wherein, voltage conversion circuit, it is pre- needed for light source for DC voltage to be converted into
If voltage；Constant-voltage control circuit, including negative-feedback circuit and Pwm controller；Negative-feedback circuit, it is wide as pulse
The peripheral circuit for spending modulation controller distinguishes phase with the compensation node pin and Voltage Feedback pin of Pwm controller
Even, the working frequency for configuring Pwm controller；Pwm controller, with voltage conversion circuit phase
Even, the working frequency for being configured according to negative-feedback circuit works, to use duty ratio will be electric for the pulse width modulating signal of a
The voltage of voltage conversion circuit reality output is adjusted in the preset range on the basis of the predeterminated voltage, and by the electricity after adjustment
Pressure feeds back to voltage conversion circuit.
Further, light source voltage closed loop control module further includes：Overvoltage crowbar, temperature protection circuit and overcurrent are protected
Protection circuit；
Overvoltage crowbar, including diode and divider resistance unit, diode and the pulse width tune
Controller and divider resistance unit processed is respectively connected with；
Temperature protection circuit is connected with the diode, pre- for being more than in the temperature of the voltage conversion circuit
If controlling the voltage conversion circuit when temperature to be stopped；
Current foldback circuit, including Metal-Oxide Semiconductor field-effect transistor and shunt resistance unit, metal-oxygen
Compound semiconductor field effect transistor is respectively connected with the Pwm controller and shunt resistance unit.
Further, light source voltage closed loop control module further includes：
Electromagnetic interference circuit is connected with the voltage conversion circuit, for inhibiting the voltage conversion circuit output voltage
In electromagnetic interference and ripple.
Further, light source voltage closed loop control module further includes：
Soft starting circuit is located between the electromagnetic interference circuit and the Pwm controller, in institute
When stating light source voltage closed loop control module and starting power up, control the Pwm controller export voltage to light source by
It is cumulative big.
Further, light source voltage closed loop control module further includes：
Detection circuit is located between the electromagnetic interference circuit and the Pwm controller, for detecting
The voltage of voltage conversion circuit reality output is stated, and feeds back to the Pwm controller.
Further, light source voltage closed loop control module further includes：
First red copper cooling fin is arranged on the Metal-Oxide Semiconductor field-effect transistor, for the gold
Category-oxide semiconductor field effect transistor radiates.
Further, light source voltage closed loop control module further includes rectification circuit, filter circuit and protection circuit；
Rectification circuit, for alternating voltage to be converted into DC voltage；
Filter circuit is connected with rectification circuit, for being filtered to DC voltage；
Divided current circuit, is respectively connected with filter circuit and voltage conversion circuit, is used for by way of shunting to whole
Current circuit and filter circuit carry out overcurrent protection.
Further, light source voltage closed loop control module further includes：
Second red copper cooling fin is arranged on the rectification circuit, for radiating to the rectification circuit.
Further, the negative-feedback circuit includes：First capacitance, first resistor, the second capacitance, second resistance, third
Resistance, third capacitance and the 4th resistance；
One end of first capacitance is connected with the compensation node pin, and the other end of the first capacitance is connect by first resistor
Ground；
Second capacitance is parallel to the both ends of the first capacitance after connecting with second resistance；
The connecting line being parallel to after 3rd resistor, third capacitance and the series connection of the 4th resistance between the first capacitance and first resistor
On；
The other end of first capacitance is also connected to the Voltage Feedback pin.
Further, the light source voltage closed loop control module is potted using heat-conducting silicon rubber.
The utility model embodiment includes at least：Voltage conversion circuit and constant-voltage control circuit；Wherein, voltage conversion electricity
Road, the predeterminated voltage for being converted into DC voltage needed for light source；Constant-voltage control circuit, including negative-feedback circuit and pulse it is wide
Spend modulation controller；Negative-feedback circuit, as the peripheral circuit of Pwm controller, with Pwm controller
Compensation node pin and Voltage Feedback pin be respectively connected with, the working frequency for configuring Pwm controller；Arteries and veins
Width modulation controller to be rushed, is connected with voltage conversion circuit, the working frequency for being configured according to negative-feedback circuit works, so that
The voltage that the pulse width modulating signal for being a with duty ratio converts the voltage into circuit reality output is adjusted to the predeterminated voltage
On the basis of preset range in, and by the Voltage Feedback after adjustment to voltage conversion circuit.From the utility model embodiment as it can be seen that
The working frequency that Pwm controller is configured by negative-feedback circuit, no matter light source voltage closed loop control module is operated in
Under room temperature or hot environment, Pwm controller can export more stable voltage, and the voltage etc. of the output
In or be more nearly predeterminated voltage needed for light source so that output is more stablized to the voltage of light source.
Other features and advantages of the utility model will illustrate in the following description, also, partly from specification
In become apparent, or understood by implementing the utility model.The purpose of this utility model and other advantages can pass through
Specifically noted structure is realized and is obtained in specification, claims and attached drawing.
Description of the drawings
Attached drawing is used for providing further understanding technical solutions of the utility model, and a part for constitution instruction,
With for explaining the technical solution of the utility model, do not constituted to technical solutions of the utility model together with embodiments herein
Limitation.
Fig. 1 is a kind of structural schematic diagram for light source voltage closed loop control module that the utility model embodiment provides；
Fig. 2 is a kind of structural schematic diagram for constant-voltage control circuit that the utility model embodiment provides；
Fig. 3 is a kind of structural schematic diagram for negative-feedback circuit that the utility model embodiment provides；
Fig. 4 is a kind of structural schematic diagram for overvoltage crowbar that the utility model embodiment provides；
Fig. 5 is a kind of structural schematic diagram for current foldback circuit that the utility model embodiment provides.
Specific implementation mode
To make the purpose of this utility model, technical solution and advantage be more clearly understood, below in conjunction with attached drawing to this
The embodiment of utility model is described in detail.It should be noted that in the absence of conflict, embodiment in the application and
Feature in embodiment mutually can be combined arbitrarily.
Step shown in the flowchart of the accompanying drawings can be in the computer system of such as a group of computer-executable instructions
It executes.Also, although logical order is shown in flow charts, and it in some cases, can be with suitable different from herein
Sequence executes shown or described step.
The utility model embodiment provides a kind of light source voltage closed loop control module, as shown in Figure 1, the light source voltage closed loop
Control module includes：Voltage conversion circuit 11 and constant-voltage control circuit 12.
Voltage conversion circuit 11, the predeterminated voltage for being converted into DC voltage needed for light source.
Constant-voltage control circuit 12, including negative-feedback circuit and Pwm controller.
Negative-feedback circuit, as the peripheral circuit of Pwm controller, the benefit with Pwm controller
It repays node pin (i.e. COMP pins) and Voltage Feedback pin (i.e. FB pins) is respectively connected with, for configuring pulse width modulation control
The working frequency of device processed.
Pwm controller is connected with voltage conversion circuit 11, the work for being configured according to negative-feedback circuit
Frequency works, and is adjusted with the voltage for using pulse width modulating signal of the duty ratio for a to convert the voltage into 11 reality output of circuit
Into the preset range on the basis of predeterminated voltage, and by the Voltage Feedback after adjustment to voltage conversion circuit 11.
It should be noted that DC voltage is when being converted into the predeterminated voltage needed for light source 20 by voltage conversion circuit 11,
Due to being influenced by extraneous factor, the voltage of 11 reality output of voltage conversion circuit is simultaneously not equal to predeterminated voltage.By negative anti-
Current feed circuit configures the working frequency of Pwm controller, and Pwm controller can convert the voltage into circuit 11
The voltage of reality output is adjusted in the preset range on the basis of predeterminated voltage, for example predeterminated voltage is Vout, by reasonable
Negative-feedback circuit is designed, the voltage of Pwm controller output can reach Vout ± 0.01v.Pulse width modulation control
The step of voltage of device processed adjustment 11 reality output of voltage conversion circuit includes：Convert the voltage into the voltage of 11 reality output of circuit
Be compared with the predeterminated voltage needed for light source 20, compare the voltage of 11 reality output of voltage conversion circuit and predeterminated voltage it
Between difference, according to mathematic interpolation duty ratio a.Circuit is converted the voltage into using the pulse width modulating signal that duty ratio is a
The voltage of 11 reality outputs is adjusted in the preset range on the basis of predeterminated voltage.Pwm controller output adjustment
Voltage afterwards forms closed-loop control to light source 20, and by the Voltage Feedback after adjustment to voltage conversion circuit 11.
As shown in Fig. 2, Pwm controller can be model XTR30011 chips, pulse width modulation control
Device processed includes sampler and comparator, and sampler is used for the voltage of 11 reality output of collection voltages conversion circuit；Comparator is used for
The voltage for converting the voltage into 11 reality output of circuit is compared with the predeterminated voltage needed for light source, compares voltage conversion circuit
Difference between the voltage and predeterminated voltage of 11 reality outputs；Wherein difference is bigger, and pulse width modulates (Pulse Width
Modulation, PWM) signal duty ratio it is bigger；Between the voltage and predeterminated voltage of 11 reality output of voltage conversion circuit
Difference is smaller, and the duty ratio of pulse width modulating signal is smaller.Pwm controller is connected to electricity by the ports PVDD
Voltage conversion circuit 11.J1 in Fig. 2 indicates the connector for two circuits to be connected.VIN indicates that input voltage, VDD indicate arteries and veins
Rush the operating voltage of width modulation controller.
Negative-feedback circuit in Fig. 2 between COMP pins and FB pins can be circuit shown in Fig. 3.As shown in figure 3,
Negative-feedback circuit includes：First capacitance C8, first resistor R22, the second capacitance C9, second resistance R10,3rd resistor R15,
Three capacitance C15 and the 4th resistance R19.
One end of first capacitance C8 is connected with the COMP pins of Pwm controller, the other end of the first capacitance C8
It is grounded by first resistor R22.
Second capacitance C9 is parallel to the both ends of the first capacitance C8 after connecting with second resistance R10.
It is parallel to the first capacitance C8 and first resistor after 3rd resistor R15, third capacitance C15 and the 4th resistance R19 series connection
On connecting line between R22.
The other end of first capacitance C8 is also connected to the FB pins of Pwm controller.
Further, on the basis of Fig. 1 corresponding embodiments, light source voltage closed loop control module further includes：Safeguard protection
Circuit 13, safety protective circuit 13 include overvoltage crowbar, temperature protection circuit and current foldback circuit.
As shown in figure 4, overvoltage crowbar includes diode U4 (i.e. XTR1N0415-D) and divider resistance unit,
Diode is respectively connected with Pwm controller and divider resistance unit.EN_ wherein in diode
CHIP is connected to the EN_CHIP in the Pwm controller in Fig. 2.Overvoltage crowbar further includes triode Q1.Point
Piezoresistance unit includes resistance R16 and resistance R25, and suitable voltage protection valve is arranged by adjusting resistance R16 and resistance R25
Value is depressured when voltage is more than the voltage protection threshold value by way of partial pressure.Temperature protection circuit, with diode
It is connected, control voltage conversion circuit 11 is stopped when being more than preset temperature for the temperature in voltage conversion circuit 11.Temperature
It includes resistance R18, negative temperature coefficient (Negative Temperature Coefficient, NTC) thermistor to protect circuit
Suitable temperature protection threshold value is arranged by adjusting resistance R18 and resistance R26 in R20 and resistance R26.Due to overvoltage crowbar
A diode U4 is shared with temperature protection circuit, takes full advantage of diode U4, reduces device use so that
Voltage stabilizing module the space occupied is smaller.
As shown in figure 5, current foldback circuit includes Metal-Oxide Semiconductor field-effect transistor (Metal-Oxide-
Semiconductor Field-Effect Transistor, MOSFET, abbreviation metal-oxide-semiconductor) and shunt resistance unit, metal-
Oxide semiconductor field effect transistor (i.e. XTR20411 in Fig. 5) and Pwm controller and shunt resistance list
Member is respectively connected with.Shunt resistance unit includes resistance R19, and suitable electric current guarantor can be arranged by adjusting the resistance value of resistance R19
Threshold values is protected, resistance R19 is smaller, and current protection threshold values is then bigger.
Further, on the basis of Fig. 1 corresponding embodiments, light source voltage closed loop control module further includes：
Electromagnetic interference (Electromagnetic Interference, EMI) circuit 14, with 11 phase of voltage conversion circuit
Even, for inhibiting the electromagnetic interference in Voltage stabilizing module and ripple.
It should be noted that carrying out the inhibition of power supply ripple and electromagnetic interference by electromagnetic interference circuit 14, rather than make
With the simple LC networks formed using inductance and capacitance so that the ripple factor of light source voltage closed loop control module only only has
0.2%, it is much smaller than similar light source voltage closed loop control module, and ripple can be effectively inhibited at high temperature.
Further, on the basis of Fig. 1 corresponding embodiments, light source voltage closed loop control module further includes：
Soft starting circuit 15 is located between electromagnetic interference circuit 14 and Pwm controller, in light source electricity
When pressure closed loop control module starts power up, control Pwm controller is exported gradually to be increased to the voltage of light source 20.
It should be noted that soft starting circuit 15 includes capacitance, comparator and Switching Converter Topologies, soft starting circuit 15
In capacitor charging obtain soft start voltage, realize Switching Converter Topologies from startup by comparator in soft starting circuit 15
To the conversion of normal operating conditions so that output gradually increases to the voltage of light source, rather than when powering on phase step type increase,
The voltage exported is not mutation, avoids causing to impact to light source due to uprushing for voltage.
Further, on the basis of Fig. 1 corresponding embodiments, light source voltage closed loop control module further includes：
Detection circuit 16 is located between the electromagnetic interference circuit 14 and the Pwm controller, for examining
The voltage of 11 reality output of voltage conversion circuit is surveyed, and feeds back to Pwm controller.
It should be noted that the voltage of 11 reality output of voltage conversion circuit is detected by detection circuit 16, so that constant pressure
The voltage that control circuit 12 converts the voltage into 11 reality output of circuit is compared with the predeterminated voltage needed for light source.Detection circuit
It is real to can be also used for detection voltage conversion circuit 11 for 16 voltage in addition to can be used for detecting 11 reality output of voltage conversion circuit
The electric current of border output.In Fig. 2, the HDrv pins and LDrv pins of Pwm controller pass through detection circuit 16 and connect respectively
It is connected to voltage conversion circuit 11.
Further, on the basis of Fig. 1 corresponding embodiments, light source voltage closed loop control module further includes rectification circuit
17, filter circuit 18 and divided current circuit 19.
Rectification circuit 17, for alternating voltage to be converted into DC voltage.
It is designed it should be noted that full-bridge rectification may be used in rectification circuit 17, utilizes the unilateal conduction of diode
Sinusoidal voltage is converted into the DC voltage unidirectionally pulsed by property.
Filter circuit 18 is connected with rectification circuit 17, for being filtered to DC voltage.
It should be noted that filter circuit 18 includes building low-pass filter by capacitor-resistor circuit, filter circuit 18 will
Transformed DC voltage is filtered rectification, while inhibiting the ripple of voltage.
Divided current circuit 19 is respectively connected with filter circuit 18 and voltage conversion circuit 11, for the side by shunting
Formula to rectification circuit 17 and filter circuit 18 to carrying out overcurrent protection.
It should be noted that divided current circuit 19 may include resistance, it is connected in parallel on the output end of rectification circuit 17, with logical
The mode for crossing shunting to carry out overcurrent protection to power module.
Further, on the basis of Fig. 1 corresponding embodiments, light source voltage closed loop control module further includes：
First red copper cooling fin is arranged on Metal-Oxide Semiconductor field-effect transistor, for metal-oxide
Object semiconductor field effect transistor radiates.
Since Metal-Oxide Semiconductor field-effect transistor has high current to flow through, obvious fever phenomenon is had,
It needs to carry out radiating treatment.Using common aluminum thermal fin and effect and bad, therefore use the good material of thermal coefficient
The heat conduction processes generated when device is worked.Select red copper heat dissipation of the thermal coefficient between 388~391W/ (mK)
Piece is installed on the XTR20411 in Fig. 5, achievees the purpose that rapid cooling.
Further, light source voltage closed loop control module further includes：
Second red copper cooling fin is arranged on rectification circuit 17, for radiating to rectification circuit 17.
Since rectification circuit 17 has high current process, obvious fever phenomenon is had, therefore thermal coefficient is selected to be situated between
Red copper cooling fin between 388~391W/ (mK), is installed on rectification circuit 17, achievees the purpose that rapid cooling.
Further, light source voltage closed loop control module is potted using heat-conducting silicon rubber.
Embedding has been carried out to light source voltage closed loop control module using heat-conducting silicon rubber, it is made to meet the same of electrical performance indexes
When, light source voltage closed loop control module can also work normally in high temperature vibration environment, meet to light source voltage closed-loop control
The antidetonation demand of module.
Further, using high temperature resistance component, for example Pwm controller is model XTR30011 cores
Piece, rectification circuit 17 are the high temperature resistant rectifier bridge stacks of model SML010FBDH06, and the metal-oxide-semiconductor in current foldback circuit is model
For the metal-oxide-semiconductor of XTR20411, diode is the high temperature shutoff control diode of model XTR1N4015, negative-feedback circuit
With Low Drift Temperature, high-precision characteristic, light source voltage closed loop control module can work long hours under 175 DEG C of environment.
According to the light source voltage closed loop control module of the utility model embodiment, including：Voltage conversion circuit and constant pressure control
Circuit processed；Wherein, voltage conversion circuit, the predeterminated voltage for being converted into DC voltage needed for light source；Constant-voltage control circuit,
Including negative-feedback circuit and Pwm controller；Negative-feedback circuit, the periphery electricity as Pwm controller
Road is respectively connected with the compensation node pin and Voltage Feedback pin of Pwm controller, for configuring pulse width
The working frequency of modulation controller；Pwm controller is connected with voltage conversion circuit, for according to negative-feedback circuit
The working frequency of configuration works, to use pulse width modulating signal of the duty ratio for a to convert the voltage into circuit reality output
Voltage is adjusted in the preset range on the basis of predeterminated voltage, and by the Voltage Feedback after adjustment to voltage conversion circuit.From
The utility model embodiment is as it can be seen that configure the working frequency of Pwm controller by negative-feedback circuit, no matter light source
Voltage close loop control module is operated under room temperature or hot environment, and Pwm controller can export more stable
Voltage, and the voltage of the output is equal to or is more nearly the predeterminated voltage needed for light source, so that electricity of the output to light source
Pressure is more stablized.
Below by specific experimental data by the utility model embodiment light source voltage closed loop control module with
Light source voltage closed loop control module in the related technology is compared：
1, under high temperature (such as 175 DEG C) environment, light source voltage closed loop control module exports in the utility model embodiment
To light source voltage accuracy error within 0.8%, export in the related technology to light source voltage error be 3%.
2, under high temperature environment, the ripple factor control of light source voltage closed loop control module exists in the utility model embodiment
Within 0.3%, ripple factor in the related technology is more than 0.5%.
3, under high temperature environment, the line regulation of light source voltage closed loop control module controls in the utility model embodiment
Within 0.2%.
4, in the utility model embodiment light source voltage closed loop control module have better vibration resistance, anti-interference ability and
Resistance to corrosion ensures that luminous power when light source output spectrum is more stablized, the terminal voltage of light source is made to subtract with the increase of light intensity
It is small, increase with the reduction of light intensity.
Although the embodiment disclosed by the utility model is as above, the content only the utility model for ease of understanding
And the embodiment used, it is not limited to the utility model.Technical staff in any the utility model fields,
Under the premise of not departing from the spirit and scope disclosed by the utility model, it can be carried out in the form and details of implementation any
Modification and variation, but the scope of patent protection of the utility model, still should be subject to the scope of the claims as defined in the appended claims.
Claims (10)
1. a kind of light source voltage closed loop control module, which is characterized in that including：Voltage conversion circuit and constant-voltage control circuit；Its
In,
Voltage conversion circuit, the predeterminated voltage for being converted into DC voltage needed for light source；
Constant-voltage control circuit, including negative-feedback circuit and Pwm controller；
Negative-feedback circuit, as the peripheral circuit of Pwm controller, the expansion joint with Pwm controller
Point pin and Voltage Feedback pin are respectively connected with, the working frequency for configuring Pwm controller；
Pwm controller is connected with voltage conversion circuit, the working frequency work for being configured according to negative-feedback circuit
Make, is adjusted to described with the voltage for using pulse width modulating signal of the duty ratio for a to convert the voltage into circuit reality output
In preset range on the basis of predeterminated voltage, and by the Voltage Feedback after adjustment to voltage conversion circuit.
2. light source voltage closed loop control module according to claim 1, which is characterized in that further include：Overvoltage crowbar,
Temperature protection circuit and current foldback circuit；
Overvoltage crowbar, including diode and divider resistance unit, diode are controlled with pulse width modulation
Device and divider resistance unit processed is respectively connected with；
Temperature protection circuit is connected with the diode, for being more than default temperature in the temperature of the voltage conversion circuit
The voltage conversion circuit is controlled when spending to be stopped；
Current foldback circuit, including Metal-Oxide Semiconductor field-effect transistor and shunt resistance unit, metal-oxide
Semiconductor field effect transistor is respectively connected with the Pwm controller and shunt resistance unit.
3. light source voltage closed loop control module according to claim 1 or 2, which is characterized in that further include：
Electromagnetic interference circuit is connected with the voltage conversion circuit, for inhibiting in the voltage conversion circuit output voltage
Electromagnetic interference and ripple.
4. light source voltage closed loop control module according to claim 3, which is characterized in that further include：
Soft starting circuit is located between the electromagnetic interference circuit and the Pwm controller, in the light
When source voltage close loop control module starts power up, controls the Pwm controller and export and gradually increase to the voltage of light source
Greatly.
5. light source voltage closed loop control module according to claim 3, which is characterized in that further include：
Detection circuit is located between the electromagnetic interference circuit and the Pwm controller, for detecting the electricity
The voltage of voltage conversion circuit reality output, and feed back to the Pwm controller.
6. light source voltage closed loop control module according to claim 2, which is characterized in that further include：
First red copper cooling fin is arranged on the Metal-Oxide Semiconductor field-effect transistor, for the metal-
Oxide semiconductor field effect transistor radiates.
7. light source voltage closed loop control module according to claim 1 or 2, which is characterized in that further include rectification circuit, filter
Wave circuit and protection circuit；
Rectification circuit, for alternating voltage to be converted into DC voltage；
Filter circuit is connected with rectification circuit, for being filtered to DC voltage；
Divided current circuit, is respectively connected with filter circuit and voltage conversion circuit, is used for by way of shunting to rectified current
Road and filter circuit carry out overcurrent protection.
8. light source voltage closed loop control module according to claim 7, which is characterized in that further include：
Second red copper cooling fin is arranged on the rectification circuit, for radiating to the rectification circuit.
9. light source voltage closed loop control module according to claim 1 or 2, which is characterized in that the negative-feedback circuit packet
It includes：First capacitance, first resistor, the second capacitance, second resistance, 3rd resistor, third capacitance and the 4th resistance；
One end of first capacitance is connected with the compensation node pin, and the other end of the first capacitance is grounded by first resistor；
Second capacitance is parallel to the both ends of the first capacitance after connecting with second resistance；
It is parallel on the connecting line between the first capacitance and first resistor after 3rd resistor, third capacitance and the series connection of the 4th resistance；
The other end of first capacitance is also connected to the Voltage Feedback pin.
10. light source voltage closed loop control module according to claim 1, which is characterized in that using heat-conducting silicon rubber to institute
Light source voltage closed loop control module is stated to be potted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820136168.9U CN207802480U (en) | 2018-01-26 | 2018-01-26 | A kind of light source voltage closed loop control module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820136168.9U CN207802480U (en) | 2018-01-26 | 2018-01-26 | A kind of light source voltage closed loop control module |
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| Publication Number | Publication Date |
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| CN207802480U true CN207802480U (en) | 2018-08-31 |
Family
ID=63269582
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108200707A (en) * | 2018-01-26 | 2018-06-22 | 中国海洋石油集团有限公司 | A kind of light source voltage control module |
-
2018
- 2018-01-26 CN CN201820136168.9U patent/CN207802480U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108200707A (en) * | 2018-01-26 | 2018-06-22 | 中国海洋石油集团有限公司 | A kind of light source voltage control module |
| CN108200707B (en) * | 2018-01-26 | 2023-12-15 | 中国海洋石油集团有限公司 | Light source voltage control module |
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