CN116505766B - DC-DC output voltage dynamic regulation method - Google Patents
DC-DC output voltage dynamic regulation method Download PDFInfo
- Publication number
- CN116505766B CN116505766B CN202310753468.7A CN202310753468A CN116505766B CN 116505766 B CN116505766 B CN 116505766B CN 202310753468 A CN202310753468 A CN 202310753468A CN 116505766 B CN116505766 B CN 116505766B
- Authority
- CN
- China
- Prior art keywords
- voltage
- current
- circuit
- controller
- output voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000033228 biological regulation Effects 0.000 title claims abstract description 16
- 238000005070 sampling Methods 0.000 claims description 28
- 239000003990 capacitor Substances 0.000 claims description 21
- 230000000630 rising effect Effects 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 abstract 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 5
- 229910052744 lithium Inorganic materials 0.000 description 5
- 239000004065 semiconductor Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009125 negative feedback regulation Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/1566—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators with means for compensating against rapid load changes, e.g. with auxiliary current source, with dual mode control or with inductance variation
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0009—Devices or circuits for detecting current in a converter
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0048—Circuits or arrangements for reducing losses
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a DC-DC output voltage dynamic regulation method, which comprises the following steps: step 1, outputting PWM initial positive duty ratio to keep t seconds, and collecting load current conversion voltage a; step 2, PWM positive duty ratio is increased by x% and kept for t seconds, x is an increasing threshold value, and current voltage a is collected n The method comprises the steps of carrying out a first treatment on the surface of the Step 3, judging whether |a-a n ∣>a, executing step 4 if m is the same, otherwise executing step 5; step 4, PWM positive duty cycle is reduced by y% and kept for t seconds, y is a reduction threshold value, and voltage a is acquired n Will last a n As new a; step 3 is entered; step 5, judging whether the PWM positive duty ratio is the set maximum value, if so, keeping the PWM positive duty ratio for t seconds, and collecting the voltage a n Will last a n As new a, go to step 3; otherwise will last a n As a new a, step 2 is performed. The invention solves the problem caused by mismatching of the output end of the circuit and the load demand voltage, and solves the problem that the circuit consumes battery energy without any reason.
Description
Technical Field
The invention belongs to the technical field of power supply electronic circuits, and particularly relates to a dynamic DC-DC output voltage regulating method.
Background
Along with the increasing of the technology level and the living standard of people, mobile devices are more and more, and the devices are smaller and lighter, but the battery of the mobile device seriously hinders the endurance time of the mobile device, so that the use experience of users is poor, and therefore, the power consumption of the mobile devices is reduced on the basis of the prior art, so that the endurance time is improved, and the mobile device is energy-saving and environment-friendly.
In an electronic circuit, if power consumption is to be reduced, power consumption of the circuit except the load must be reduced, so that the voltage of the power supply terminal and the voltage of the load terminal are dynamically matched on the premise of not influencing the work of the load, so as to reduce the loss of the circuit. In the existing conventional DC-DC circuit, the output voltage is a fixed value, but the working voltage of some loads can be changed greatly along with factors such as time and temperature, so that in order to ensure the normal work of the loads, the output voltage can only be set according to the highest voltage, obviously, the power consumption of the circuit in the circuit can be increased, and therefore, the existing conventional DC-DC circuit needs to be optimized, namely, the output voltage of the DC-DC circuit is dynamically regulated according to the change of the working voltage of the loads, so that the advantages of reducing the power consumption of the circuit, reducing the temperature of devices, prolonging the service life, prolonging the battery endurance time and the like are realized.
However, due to the large-scale products and the increasingly perfect supply chains, in the actual production process, a qualified product is often composed of a plurality of modules, a power supply system and a load are independent in many times, and the load is provided with an independent driving circuit and sealing treatment, so that the working voltage of the load cannot be directly acquired, and the output voltage of the DC-DC circuit cannot be matched with the working voltage of the load, so that the problems are needed to be solved.
Disclosure of Invention
The invention aims to provide a DC-DC output voltage dynamic regulation method, which aims to solve the problem that the power consumption is large and the battery energy is consumed without any reason caused by mismatching of the output end and the load end of the existing DC-DC circuit.
In order to realize the tasks, the invention adopts the following technical scheme:
the DC-DC output voltage dynamic regulation method is based on a DC-DC output voltage dynamic regulation system, and the DC-DC output voltage dynamic regulation system comprises a current sampling circuit, a controller and a DC-DC circuit; the current sampling circuit is used for collecting load current, converting a current component into a voltage component, amplifying a signal and sending the signal to the controller; the controller is connected with the DC-DC circuit and is used for sending a PWM instruction to the DC-DC circuit according to the voltage component converted by the current sampling circuit; the DC-DC circuit is also connected with a load and an external power supply and is used for outputting a voltage matched with the working voltage of the load under the action of a PWM instruction; the DC-DC circuit is a boosting DC-DC circuit or a step-down DC-DC circuit; the method for dynamically regulating the DC-DC output voltage comprises the following steps:
step 1, in an initial state, a controller outputs an initial PWM positive duty ratio and keeps for t seconds, and a current sampling circuit acquires load current and converts the load current into voltage a and sends the voltage a to the controller for storage; step 2 is entered;
step 2, the controller outputs the positive duty ratio of PWM to rise by x% and keeps for t seconds, x is the rising threshold value, at the moment, the current sampling circuit collects the current of the current load and converts the current into voltage a n Sending the data to a controller and storing the data; step 3 is entered;
step 3, the controller determines whether |a-a n ∣>a is m, m is a load current variation threshold, if yes, executing step 4, otherwise, executing step 5;
step 4, the controller outputs PWM positive duty cycle to reduce y% and keep t seconds, y is the descending threshold, at this time, the current sampling circuit collects the current of the current load and converts the current into voltage a n Sending to the controller and storing, and collecting the voltage a n Stored as a new voltage a; step 3 is entered;
step 5, the controller judges whether the PWM positive duty cycle is the set maximum value, if yes, the current sampling circuit acquires the current load current and converts the current load current into voltage a after keeping the PWM positive duty cycle for t seconds at the moment n Sending to the controller and storing, and collecting the voltage a n As a new voltage a and stored; executing the step 3; otherwise, the last acquired voltage a n Step 2 is performed as a new voltage a and stored.
Further, the DC-DC circuit adopts a boost DC-DC circuit, and comprises resistors R1, R2, R3 and R4, capacitors C1, C2 and C3, a Schottky diode D1, an inductor L1 and a boost chip U1; one end VOUT of a resistor R1 is connected with one end of a capacitor C2 and the cathode of a Schottky diode D1, the anode of the Schottky diode D1, the 1 pin of a boost chip U1 and one end of an inductor L1 are commonly connected, and the other end of the capacitor C2 is grounded; the other end of the resistor R1 is commonly connected with the 3 pin of the boost chip U1, one end of the resistor R2 and one end of the resistor R3, and the common end is used as a feedback input end of the boost chip U1; the other end of the inductor L1 is commonly connected with the pin 4, the pin 5 and one end of the capacitor C1 of the boost chip, and the common end is used as one input end of the DC-DC circuit to be connected with an external power supply VCC; the 6 pins of the boost chip U1 are suspended in the air; the other end of the capacitor C1 is grounded together with the other end of the resistor R2 and one end of the capacitor C3, and the pin 2 of the boost chip U1 is grounded; the other end of the resistor R3 is commonly connected with the other end of the capacitor C3 and one end of the resistor R4; the other end of the resistor R4 is connected with the controller as the other input end of the DC-DC circuit.
Further, in step 1, the initial PWM positive duty cycle is 0-40%.
Further, in step 1, the holding time t is 1 to 600 seconds.
In step 3, the load current variation threshold m is 1 to 20.
Further, the rising threshold value x is 1 to 30.
Further, the drop threshold y is 1 to 30.
In step 5, the set maximum value is 60-100%.
Compared with the prior art, the invention has the following technical effects:
the DC-DC output voltage dynamic regulation method adopted by the invention is negative feedback regulation, is suitable for a DC-DC circuit formed by a DC-DC chip with a feedback input end, is stable and reliable, can adapt to the conditions of constant current load with unstable working voltage caused by time, temperature and the like and the load voltage can not be directly collected, and has strong universality. The circuit effectively solves various problems caused by mismatching of the output end and the load end required voltage due to the fact that the output voltage of a conventional DC-DC circuit is fixed, realizes dynamic matching of the power supply voltage and the load working voltage, reduces circuit power consumption, and fundamentally solves the problem that the circuit consumes battery energy without any cause.
Drawings
FIG. 1 is a schematic block diagram of a DC-DC output voltage dynamic regulation system employed in the method of the present invention;
FIG. 2 is a graph showing the variation of the constant current load operating current with operating voltage;
FIG. 3 is a plot of DC-DC output voltage versus PWM positive duty cycle;
fig. 4 is a circuit diagram of a DC-DC output voltage dynamic regulation.
The invention is further explained below with reference to the drawing and the specific embodiments.
Detailed Description
As shown in fig. 1, the DC-DC output voltage dynamic regulation system on which the method of the present invention is based comprises:
the input end of the current sampling circuit is connected with the load, the output end of the current sampling circuit is connected with the controller, and the current sampling circuit is used for collecting load current, converting a current component into a voltage component, amplifying a signal and sending the amplified signal to the controller;
the controller is connected with the DC-DC circuit and is used for sending a PWM instruction to the DC-DC circuit according to the voltage component converted by the current sampling circuit;
and the DC-DC circuit is also connected with a load and an external power supply and is used for outputting a voltage matched with the working voltage of the load under the action of the PWM command.
In practical application, the power supply voltages of different constant current loads and at different temperatures are different, and the power supply voltage and the load working voltage are matched.
As shown in fig. 2, based on a constant current load whose operating voltage is unstable due to time, temperature, etc., when the voltage of the power supply is higher than the load operating voltage, the operating current of the load is maintained constant, and the load can operate stably; however, when the power supply voltage is insufficient, the load current is greatly reduced, and the load works unstably.
As shown in fig. 3, the controller adjusts the PWM positive duty ratio and sends it to the DC-DC circuit, so that the output voltage of the DC-DC circuit can be adjusted in real time to match with the load operating voltage, and the load is ensured to operate stably.
Preferably, the controller employs a single-chip microcomputer PMS134.
Specifically, the current sampling circuit adopts a high-precision sampling resistor and a signal amplifying circuit, and preferably, the signal amplifying circuit adopts an operational amplifier with the model of LMV 321.
Specifically, the load is a semiconductor laser diode, the working voltage of the semiconductor laser diode is between 5 and 7.5V, and the voltage of the semiconductor laser diode is inversely related with the temperature. It is specifically stated that the load in the system includes, but is not limited to, one.
As shown in fig. 4, the DC-DC circuit is preferably a boost DC-DC circuit, and includes resistors R1, R2, R3, R4, capacitors C1, C2, C3, schottky diode D1, inductor L1, and boost chip U1; one end VOUT of a resistor R1 is connected with one end of a capacitor C2 and the cathode of a Schottky diode D1, the anode of the Schottky diode D1, the 1 pin of a boost chip U1 and one end of an inductor L1 are commonly connected, and the other end of the capacitor C2 is grounded; the other end of the resistor R1 is commonly connected with the 3 pin of the boost chip U1, one end of the resistor R2 and one end of the resistor R3, and the common end is used as a feedback input end of the boost chip U1; the other end of the inductor L1 is commonly connected with the pin 4, the pin 5 and one end of the capacitor C1 of the boost chip, and the common end is used as one input end of the DC-DC circuit to be connected with an external power supply VCC; the 6 pins of the boost chip U1 are suspended in the air; the other end of the capacitor C1 is grounded together with the other end of the resistor R2 and one end of the capacitor C3, and the pin 2 of the boost chip U1 is grounded; the other end of the resistor R3 is commonly connected with the other end of the capacitor C3 and one end of the resistor R4; the other end of the resistor R4 is used as the other input end of the DC-DC circuit to be connected with the controller and used for receiving the instruction signal.
Specifically, the DC-DC circuit adopts a DC-DC booster circuit or a DC-DC buck circuit, and the selection of the booster chip or the buck chip in the circuit is selected according to actual needs. In practical use, if the external power source is a battery, the batteries can be connected in series or in parallel to obtain a larger endurance time, then a buck chip is generally used when the lowest discharge voltage of the battery is higher than the working voltage of the load applied by the circuit of the invention, otherwise a boost chip is used.
The PWM instruction sent by the controller is used for adjusting the output voltage range of the DC-DC circuit to be larger than the working voltage range of the load;
the method for dynamically adjusting the DC-DC output voltage provided by the embodiment adopts the DC-DC output voltage dynamic adjusting system provided by the invention, the controller adopts the singlechip PMS134, and when the singlechip is electrified, the load starts to work at the same time, and when the load is restarted, the method starts to be executed from the step 1.
Step 1, in an initial state, a controller outputs an initial PWM positive duty ratio and keeps for t seconds, and a current sampling circuit acquires load current and converts the load current into voltage a and sends the voltage a to the controller for storage; step 2 is entered;
step 2, the controller outputs the positive duty ratio of PWM to rise by x% and keeps for t seconds, x is the rising threshold value, at the moment, the current sampling circuit collects the current of the current load and converts the current into voltage a n Sending the data to a controller and storing the data; step 3 is entered;
step 3, the controller determines whether |a-a n ∣>a is m, m is a load current variation threshold, if yes, executing step 4, otherwise, executing step 5;
step 4, the controller outputs PWM positive duty cycle reductiony% and keeping for t seconds, wherein y is a falling threshold value, and the current sampling circuit acquires the current of the current load and converts the current into voltage a n Sending to the controller and storing, and collecting the voltage a n Stored as a new voltage a; step 3 is entered;
step 5, the controller judges whether the PWM positive duty cycle is the set maximum value, if yes, the current sampling circuit acquires the current load current and converts the current load current into voltage a after keeping the PWM positive duty cycle for t seconds at the moment n Sending to the controller and storing, and collecting the voltage a n As a new voltage a and stored; executing the step 3; otherwise, the last acquired voltage a n Step 2 is performed as a new voltage a and stored.
In the scheme, the holding time t is 1-600 seconds; the load current variation threshold value m is 1-20; the rising threshold value x is 1-30; the falling threshold y is 1-30; the PWM initial positive duty ratio is 0-40%; the maximum value is set to 60-100%.
The method can achieve the purpose of dynamically adjusting the output voltage of the DC-DC circuit by using the load current.
To clearly describe the choice of threshold settings in the present invention, a logic analysis is performed as follows:
example 1:
in the method of the present embodiment, the holding time t is 1 to 600 seconds. According to the light emitting characteristics of the laser diode, the laser diode can be stably output after being electrified for 1-60 seconds in general, and the load current is accurately collected at this time, but the time is not too long, otherwise, when the ambient temperature suddenly changes, the system cannot quickly adjust the DC-DC output voltage, so that the holding time is set to be not more than 600 seconds in general, and the holding time t is set to be 60 seconds in the embodiment. In step 1, the PWM initial positive duty cycle is 0%; in the step 3, the load current variation threshold m is 5; in step 5, the maximum PWM positive duty cycle is set to 100%.
As shown in fig. 2, when the DC-DC output voltage is lower than 6.36V, the load current starts to gradually decrease, and if the load current variation is set to be too small, the requirement on the sampling precision of the singlechip is higher, the corresponding cost is increased, so that the sampling is too frequent, and no beneficial effect is brought. Similarly, if the load current variation is set too large, the normal operation of the load is directly affected, and according to the invention, the threshold value m=5% is set because of the working current of the laser diode and the sampling precision of the singlechip.
As shown in fig. 2 and 3, when the output voltage is 6.36V, the current is 87mA, the PWM positive duty ratio is gradually increased, the load current is gradually reduced until the current variation exceeds the preset value m=5%, at this time, the current is about 82mA, the output voltage is about 6.26V, according to the PWM increase of about 5% at this time as shown in fig. 3, because the discreteness of the load current is larger, if the load current is smaller, the PWM increase is 5%, the current variation may not reach the preset value 5%, the single chip microcomputer executes one more steps, the response speed of the system is reduced, and in order to ensure the effectiveness of each sampling, the threshold value x=10% is set in the steps. The system can be suitable for various loads and various current magnitudes, so that the set threshold range of x in the step can be expanded to 1-30%;
similarly, in order to maintain stable operation of the DC-DC output voltage dynamic system, the set threshold values of y and x should satisfy y-x being greater than or equal to 0, so that the set threshold value y=10% in the step, and the set threshold value range of y can be expanded to 1-30%.
In order to embody the beneficial effect of the invention on improving endurance, test data are as follows:
example 2:
the constant current load is 1 laser diode, the external power supply is three dry batteries connected in series, and the result is as follows:
the laser diode is powered by a common DC-DC boost circuit, and the total work is about 9 hours from full power operation of the dry battery to feeding of the dry battery;
the dynamic DC-DC output voltage regulating system is used for supplying power to the laser diode, and the total work is about 10 hours and 40 minutes from full power operation of the dry battery to feeding of the dry battery;
the service time is prolonged by about 1 hour and 40 minutes compared with the common DC-DC booster circuit, and the ratio is 18.5%.
Example 3:
the constant current load selected is 3 laser diodes, external power is supplied to a single lithium battery, and the result is as follows:
the common DC-DC boost circuit is used for supplying power to the laser diode, and the total work is about 3 hours and 03 minutes when the lithium battery is fully charged and the lithium battery is fed for protection;
the DC-DC output voltage dynamic regulation system is used for supplying power to the laser diode, and the total work is about 3 hours and 57 minutes when the lithium battery is fully charged and the lithium battery is fed for protection;
the service time is prolonged by about 54 minutes compared with the common DC-DC booster circuit, and the ratio is 29.5%.
Since the difference of the battery capacity, the ambient temperature, the working voltage, the current and other parameters of the laser diode has a great influence on the test result, the data are only used as further description of the invention, and cannot be considered as the optimal result of the electricity saving of the invention.
It should be noted that, any form of modification or alternation of the DC-DC output voltage dynamic regulation method by those skilled in the art to achieve the equivalent effect is essentially or logically considered as the protection scope of the present invention.
Claims (8)
1. The DC-DC output voltage dynamic regulation method is characterized by being based on a DC-DC output voltage dynamic regulation system, wherein the DC-DC output voltage dynamic regulation system comprises a current sampling circuit, a controller and a DC-DC circuit; the current sampling circuit is used for collecting load current, converting a current component into a voltage component, amplifying a signal and sending the signal to the controller; the controller is connected with the DC-DC circuit and is used for sending a PWM instruction to the DC-DC circuit according to the voltage component converted by the current sampling circuit; the DC-DC circuit is also connected with a load and an external power supply and is used for outputting a voltage matched with the working voltage of the load under the action of a PWM instruction; the DC-DC circuit is a boosting DC-DC circuit or a step-down DC-DC circuit; the method for dynamically regulating the DC-DC output voltage comprises the following steps:
step 1, in an initial state, a controller outputs an initial PWM positive duty ratio and keeps for t seconds, and a current sampling circuit collects load current and converts the load current into voltage a, and the voltage a is sent to the controller and stored; step 2 is entered;
step 2, the controller outputs the positive duty ratio of PWM to rise by x% and keeps for t seconds, x is the rising threshold value, at this time, the current sampling circuit collects the current of the current load and converts the current into voltage a n Sending the data to a controller and storing the data; step 3 is entered;
step 3, the controller determines whether |a-a n ∣>a is m, m is a load current variation threshold, if yes, executing step 4, otherwise, executing step 5;
step 4, the controller outputs PWM positive duty cycle to reduce y% and keep t seconds, y is the descending threshold, at this time, the current sampling circuit collects the current of the current load and converts the current into voltage a n Sending to the controller and storing, and collecting the voltage a n Stored as a new voltage a; step 3 is entered;
step 5, the controller judges whether the PWM positive duty ratio is the set maximum value, if yes, the current sampling circuit acquires the current load current and converts the current load current into voltage a after keeping the PWM positive duty ratio for t seconds at the moment n Sending to the controller and storing, and collecting the voltage a n As a new voltage a and stored; executing the step 3; otherwise, the last acquired voltage a n Step 2 is performed as a new voltage a and stored.
2. The method for dynamically adjusting the output voltage of the DC-DC converter according to claim 1, wherein the DC-DC circuit adopts a boost DC-DC circuit, and comprises resistors R1, R2, R3 and R4, capacitors C1, C2 and C3, a Schottky diode D1, an inductor L1 and a boost chip U1; one end VOUT of a resistor R1 is connected with one end of a capacitor C2 and the cathode of a Schottky diode D1, the anode of the Schottky diode D1, the 1 pin of a boost chip U1 and one end of an inductor L1 are commonly connected, and the other end of the capacitor C2 is grounded; the other end of the resistor R1 is commonly connected with the 3 pin of the boost chip U1, one end of the resistor R2 and one end of the resistor R3 to serve as a feedback input end of the boost chip U1; the other end of the inductor L1 is commonly connected with the pin 4, the pin 5 and one end of the capacitor C1 of the boost chip, and is used as one input end of the DC-DC circuit to be connected with an external power supply VCC; the 6 pins of the boost chip U1 are suspended in the air; the other end of the capacitor C1 is grounded together with the other end of the resistor R2 and one end of the capacitor C3, and the pin 2 of the boost chip U1 is grounded; the other end of the resistor R3 is commonly connected with the other end of the capacitor C3 and one end of the resistor R4; the other end of the resistor R4 is connected with the controller as the other input end of the DC-DC circuit.
3. The method for dynamically adjusting a DC-DC output voltage according to claim 1 or 2, wherein in step 1, the initial PWM positive duty cycle is 0 to 40%.
4. The method for dynamically adjusting a DC-DC output voltage according to claim 1 or 2, wherein in step 1, the holding time t is 1 to 600 seconds.
5. The method for dynamically adjusting a DC-DC output voltage according to claim 1 or 2, wherein in step 3, the load current variation threshold m is 1 to 20.
6. The method for dynamically adjusting a DC-DC output voltage according to claim 1 or 2, wherein the rising threshold x is 1 to 30.
7. The method for dynamically adjusting a DC-DC output voltage according to claim 1 or 2, wherein the drop threshold y is 1 to 30.
8. The method for dynamically adjusting a DC-DC output voltage according to claim 1 or 2, wherein in step 5, the set maximum value is 60 to 100%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310753468.7A CN116505766B (en) | 2023-06-26 | 2023-06-26 | DC-DC output voltage dynamic regulation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310753468.7A CN116505766B (en) | 2023-06-26 | 2023-06-26 | DC-DC output voltage dynamic regulation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116505766A CN116505766A (en) | 2023-07-28 |
| CN116505766B true CN116505766B (en) | 2023-09-15 |
Family
ID=87326969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310753468.7A Active CN116505766B (en) | 2023-06-26 | 2023-06-26 | DC-DC output voltage dynamic regulation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116505766B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101286702A (en) * | 2008-05-06 | 2008-10-15 | 深圳航天科技创新研究院 | Adaptive digital DC/DC control method and converter with fast dynamic response |
| CN101873090A (en) * | 2010-07-06 | 2010-10-27 | 太原科技大学 | Maximal power output optimization and control method for partially sheltered photovoltaic system |
| US8975831B1 (en) * | 2013-11-27 | 2015-03-10 | Linear Technology Corporation | Pre-charging inductor in switching converter while delaying PWM dimming signal to achieve high PWM dimming ratio in LED drivers |
| CN108616209A (en) * | 2018-04-17 | 2018-10-02 | 华南理工大学 | A kind of dynamic regulating method of digital power largest duty cycle value |
| CN114598148A (en) * | 2022-03-11 | 2022-06-07 | 西京学院 | Multi-mode discrimination Buck-Boost conversion device and control method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1992493B (en) * | 2005-12-30 | 2011-05-18 | 艾默生网络能源系统北美公司 | Resonance DC/DC converter and control method thereof |
| JP5278817B2 (en) * | 2009-04-28 | 2013-09-04 | 富士電機株式会社 | Switching power supply |
-
2023
- 2023-06-26 CN CN202310753468.7A patent/CN116505766B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101286702A (en) * | 2008-05-06 | 2008-10-15 | 深圳航天科技创新研究院 | Adaptive digital DC/DC control method and converter with fast dynamic response |
| CN101873090A (en) * | 2010-07-06 | 2010-10-27 | 太原科技大学 | Maximal power output optimization and control method for partially sheltered photovoltaic system |
| US8975831B1 (en) * | 2013-11-27 | 2015-03-10 | Linear Technology Corporation | Pre-charging inductor in switching converter while delaying PWM dimming signal to achieve high PWM dimming ratio in LED drivers |
| CN108616209A (en) * | 2018-04-17 | 2018-10-02 | 华南理工大学 | A kind of dynamic regulating method of digital power largest duty cycle value |
| CN114598148A (en) * | 2022-03-11 | 2022-06-07 | 西京学院 | Multi-mode discrimination Buck-Boost conversion device and control method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116505766A (en) | 2023-07-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9966848B2 (en) | Systems and methods for enhanced efficiency auxiliary power supply module | |
| CN1929274B (en) | Controller and control method for dc-dc converter | |
| TWI492483B (en) | Step - up battery charge management system and its control method | |
| CN101228684B (en) | Power supply device and electric device using the same | |
| CN101222176B (en) | Direct-current power supply converting circuit and mode switching method | |
| KR20080009083A (en) | Adaptive power control for hysteretic regulators | |
| TW201108577A (en) | Methods for light load efficiency improvement of a buck boost voltage regulater | |
| CN116505766B (en) | DC-DC output voltage dynamic regulation method | |
| CN100379134C (en) | Step-up switching voltage regulator circuit | |
| CN112306139A (en) | Micro-power solar self-adaptive collection system | |
| CN111885784A (en) | Control circuit and lighting device | |
| CN112803744B (en) | Low-power-consumption power supply starting control device and method and power supply equipment | |
| CN111614143B (en) | Single-port adjustable charge-discharge circuit | |
| CN204928194U (en) | Solar photovoltaic power generation system's DC power supply | |
| CN206164935U (en) | LED driving circuit | |
| CN108880250B (en) | Boost circuit and DC/DC converter | |
| CN106685224A (en) | Self-adaptive voltage regulator | |
| CN112636416A (en) | Power management system circuit capable of converting low-power-consumption lithium battery into U-shaped battery through charging and discharging at same port | |
| CN109195267B (en) | Novel direct current intelligent LED light source and control system | |
| CN217590297U (en) | Input voltage regulating circuit module and charging device | |
| CN218124565U (en) | AC/DC intelligent power supply module | |
| CN210007952U (en) | LED lamp drive control circuit | |
| CN217216963U (en) | DC3.6-100V boosting type constant-current LED circuit | |
| CN221058057U (en) | Charging regulating circuit and charging management device comprising same | |
| CN204425257U (en) | Solar panel maximum power output device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |