CN113131589B - Constant power supply module and integrated circuit - Google Patents
Constant power supply module and integrated circuit Download PDFInfo
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- CN113131589B CN113131589B CN202110581822.3A CN202110581822A CN113131589B CN 113131589 B CN113131589 B CN 113131589B CN 202110581822 A CN202110581822 A CN 202110581822A CN 113131589 B CN113131589 B CN 113131589B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00308—Overvoltage protection
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- 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
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Abstract
The invention discloses a constant power supply module and an integrated circuit.A control unit calculates output power according to output voltage and output current, judges whether the output power is smaller than preset target power, and if the output power is larger than the preset target power, the control unit regulates a control signal through an upper regulation, and then enables the power supply unit to regulate the output voltage downwards through a resistance feedback network so as to achieve the purpose of regulating the output power downwards; if the output power is smaller than the preset target power, the control unit regulates the output voltage up through the resistor feedback network by regulating the control signal downwards, and finally the aim of regulating the output power up is achieved. The invention provides three resistor feedback networks, which are respectively: the voltage and current control composite resistor feedback network, the voltage control composite resistor feedback network and the current control composite feedback network. The invention adopts the control unit to send the control signal to the resistor feedback network to adjust the output voltage of the power supply unit, thereby realizing constant power output, having simple structure and wide application range.
Description
Technical Field
The invention relates to the field of power supplies, in particular to a constant power supply module and an integrated circuit.
Background
In an intrinsic safety electrical system, electric equipment is often required to be provided with a redundant power supply, the traditional redundant power supply is arranged in the intrinsic safety power supply, power is supplied to one or more devices through long cables, and when the cables fail, the redundant power supply also fails. And because the voltage of the power supply system is generally 12-24 VDC, the power supply distance is generally 1-6 km, and the power supply is powered by 18V and 0.75mm 2 Cable (distributed resistance: 26 Ω/km), 1km distance, and peak current of the consumer 300 mA. The voltage drop of the cable is 26 omega/km 1km 300 mA=15.6V, the voltage across the electric equipment is 18-15.6=2.4V, and the voltage drop of the cable is serious, so that the carrying capacity is insufficient.
Because the power of the electric equipment has wave peaks and wave troughs, the power supply scheme is designed according to the sum of the maximum instantaneous power of the electric equipment, if the electric equipment is provided with a battery, a constant-power supply is used for charging, as long as the charging power is larger than the average power consumption of the equipment, the power supply scheme only needs to be designed according to the charging power, and the load capacity is greatly improved. The existing charging circuit is a constant voltage and constant current power supply, and the output stage is divided into: the trickle charge phase, the constant current charge phase, the constant voltage charge phase and the charge end, and the requirement of constant power charge cannot be met.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a constant power supply module and an integrated circuit, and aims to realize constant power output.
First aspect
The invention provides a constant power supply module, which comprises a first power supply unit, a first voltage detection unit, a first current detection unit, a first control unit and a voltage-current control composite resistor feedback network, wherein the first power supply unit is connected with the first voltage detection unit;
the first voltage detection unit is used for detecting a first output voltage of the first power supply unit;
the first current detection unit is used for detecting a first output current of the first power supply unit;
the first control unit is used for generating a first control signal according to a first output voltage and a first output current;
the voltage-current control composite resistor feedback network is used for integrating the first output voltage, the first output current and the first control signal to generate a first feedback signal and sending the first feedback signal to the feedback end of the first power supply unit;
the first power supply unit adjusts the voltage value of the first output voltage according to the first feedback signal;
the voltage-current control composite resistor feedback network comprises a first voltage feedback branch resistor, a first current feedback branch resistor, a first control feedback branch resistor and a first grounding resistor; the first voltage feedback branch resistor is connected between the output end and the feedback end of the first power supply unit; the first current feedback branch resistor is connected between the feedback end of the first power supply unit and the output end of the first current detection unit; the first control feedback branch resistor is connected between the feedback end of the first power supply unit and the output end of the first control unit; the first grounding resistor is connected between the feedback end of the first power supply unit and the ground.
The constant power supply circuit provided by the invention can realize constant power output, and the constant power value can be adjusted, so that the constant power charging requirement in an intrinsic safety system is met.
Preferably, the first voltage feedback branch resistor R v First current feedback branch resistor R i And a first grounding resistance R g The calculation formula of (2) is as follows:
wherein V is f A feedback point voltage of the first power supply unit; v (V) v An output voltage of the first power supply unit; v (V) i An output voltage of the first current detection unit; v (V) vmax Is the maximum output voltage of the first power supply unit; v (V) imax Is the maximum output voltage of the first current detection unit; v (V) cmax Is the maximum output voltage of the first control unit.
Preferably, the first control unit is configured to generate the first control signal according to the first output voltage and the first output current specifically: the first control unit calculates output power according to the first output voltage and the first output current, and judges whether the output power is smaller than a preset target power or not; if yes, the first control unit generates a first lower control signal; if not, the control unit generates a first up-regulation control signal.
Preferably, the first control unit is further configured to determine whether the first output voltage of the first power supply unit is greater than a preset trickle voltage, and if yes, the first control unit sets a preset target power to be equal to a preset constant power.
Preferably, if the first output voltage is less than or equal to a preset trickle voltage, the first control unit judges whether the preset constant power is greater than the preset trickle power, if so, the first control unit sets the preset target power to be equal to the preset trickle power; if not, the first control unit sets the preset target power equal to the preset constant power.
Preferably, the first control unit is further configured to determine whether the first output voltage is less than a preset upper voltage limit, and if not, the first control unit generates a second down-regulation control signal and sends the second down-regulation control signal to the first power supply unit, where the first power supply unit down-regulates the output voltage according to the second down-regulation control signal.
Preferably, the first control unit is further configured to determine whether the output current is less than a preset current upper limit, and if not, the first control unit generates a third down-regulation control signal and sends the third down-regulation control signal to the first power supply unit, where the first power supply unit down-regulates the output voltage according to the third down-regulation control signal.
Second aspect
The invention provides a constant power supply module, which comprises a second power supply unit, a second voltage detection unit, a second current detection unit, a second control unit and a voltage control composite resistor feedback network, wherein the second power supply unit is connected with the second voltage detection unit;
the second voltage detection unit is used for detecting a second output voltage of the second power supply unit;
the second current detection unit is used for detecting a second output current of the second power supply unit;
the second control unit is used for generating a second control signal according to a second output voltage and a second output current;
the voltage control composite resistor feedback network is used for integrating the second output voltage and the second control signal to generate a second feedback signal and transmitting the second feedback signal to the feedback end of the second power supply unit;
the second power supply unit adjusts the voltage value of the second output voltage according to the second feedback signal;
the voltage control composite resistor feedback network comprises a second voltage feedback branch resistor, a second control feedback branch resistor and a second grounding resistor; the second voltage feedback branch resistor is connected between the output end and the feedback end of the second power supply unit; the second control feedback branch resistor is connected between the feedback end of the second power supply unit and the output end of the control unit; the second grounding resistor is connected between the feedback end of the second power supply unit and the ground.
Third aspect of the invention
The invention provides a constant power supply module, which comprises a third power supply unit, a third voltage detection unit, a third current detection unit, a third control unit and a current control composite resistor feedback network, wherein the third voltage detection unit is connected with the third current detection unit;
the third voltage detection unit is used for detecting a third output voltage of the third power supply unit;
the third current detection unit is used for detecting a third output current of the third power supply unit;
the third control unit is used for generating a third control signal according to a third output voltage and a third output current;
the current control composite resistor feedback network is used for integrating a third output current and a third control signal to generate a third feedback signal and sending the third feedback signal to the feedback end of the third power supply unit;
the third power supply unit adjusts the voltage value of the third output voltage according to the feedback signal;
the current control composite resistor feedback network comprises a second current feedback branch resistor, a third control feedback branch resistor and a third grounding resistor; the second current feedback branch resistor is connected between the feedback end of the third power supply unit and the output end of the third current detection unit; the third control feedback branch resistor is connected between the feedback end of the third power supply unit and the output end of the third control unit; the third grounding resistor is connected between the feedback end of the third power supply unit and the ground.
Fourth aspect of
The invention provides an integrated circuit comprising the constant power supply module of the first aspect. The integrated circuit provided by the invention can be used as a functional circuit for other applications to charge a battery. The charging equipment which can be arranged in the electric equipment and used as a battery not only avoids the failure of a redundant power supply caused by cable faults, but also solves the problem that the voltage drop of the cable is very serious caused by too long power supply distance, and achieves the true effective redundant effect.
The beneficial effects of the invention are as follows: the control unit is used for sending a control signal to the power supply unit through the resistor feedback network, so that the output voltage of the power supply unit is regulated, constant power output is realized, the constant power value can be regulated according to actual conditions, and the requirement of constant power charging in the intrinsic safety system is met. The voltage-current control composite resistor feedback network, the voltage-current control composite resistor feedback network and the current control composite resistor feedback network are designed, so that on one hand, output power, voltage and current fluctuation caused by load fluctuation can be effectively avoided, and on the other hand, when a specific fault occurs in a battery or a circuit, the output voltage cannot exceed a safety range, and reliability and safety are improved. The power supply unit is a common voltage-stabilized power supply in the market, can be a linear power supply such as LDO (low dropout regulator) or a switching power supply such as buck power supply, and is based on a constant power supply module, simple in structure, wide in application range and low in cost.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. Like elements or portions are generally identified by like reference numerals throughout the several figures. In the drawings, elements or portions thereof are not necessarily drawn to scale.
FIG. 1 is a schematic block diagram of embodiment 1 of the present invention;
FIG. 2 is a schematic circuit diagram of embodiment 1 of the present invention;
FIG. 3 is a flowchart illustrating the operation of embodiment 1 of the present invention;
FIG. 4 is a schematic diagram of output power regulation;
FIG. 5 is a schematic diagram of output voltage regulation;
FIG. 6 is a schematic diagram of output current regulation;
FIG. 7 is a schematic block diagram of embodiment 2 of the present invention;
fig. 8 is a schematic block diagram of embodiment 3 of the present invention.
Detailed Description
Embodiments of the technical scheme of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present invention, and thus are merely examples, and are not intended to limit the scope of the present invention.
It is noted that unless otherwise indicated, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.
Example 1
The embodiment of the invention provides a constant power supply module, which is shown in fig. 1 and 2, and comprises a power supply unit, a voltage detection unit, a current detection unit, a control unit and a voltage-current control composite resistor feedback network. The voltage detection unit is used for detecting the output voltage of the power supply unit, the current detection unit is used for detecting the output current of the power supply unit, and the control unit is used for generating a control signal according to the output voltage and the output current. The voltage-current control composite resistor feedback network is used for integrating the output voltage, the output current and the control signal to generate a feedback signal and sending the feedback signal to the feedback end of the power supply unit, and the power supply unit adjusts the voltage value of the output voltage according to the feedback signal, so that constant power output of the power supply unit is realized. The power supply unit may be any power supply with a voltage feedback terminal. The voltage-current control composite resistor feedback network integrates the output voltage, the output current and the control signal of the control unit and then inputs the integrated output voltage, the output current and the control signal of the control unit to the feedback end of the power supply unit, the output voltage of the power supply unit is simultaneously fed back by the output voltage, the output current and the control signal of the control unit, and the control signal of the control unit is an analog signal processed by a DAC (digital-to-analog conversion) and a voltage follower circuit. The voltage detection unit is a voltage sampling analog circuit. The current detection unit is an analog circuit which converts current into voltage and performs amplification processing.
The voltage-current control composite resistor feedback network comprises a voltage feedback branch resistor, a current feedback branch resistor, a control feedback branch resistor and a grounding resistor. The voltage feedback branch resistor is connected between the output end and the feedback end of the power supply unit, the current feedback branch resistor is connected between the feedback end and the output end of the current detection unit, the control feedback branch resistor is connected between the feedback end and the output end of the control unit, and the grounding resistor is connected between the feedback end and the ground of the power supply unit.
The workflow of the embodiment of the invention is shown in fig. 3, and comprises the following steps:
step one: program initialization: the control unit presets the control signal as a maximum value and performs floating point integer operation. Because the floating point operation consumes a large amount of time, the floating point operation is shaped in the program initialization stage, so that the operation speed can be greatly improved, and the step II is entered;
step two: output voltage and current detection: collecting output voltage and output current, converting voltage and current analog signals into digital signals by the control unit through the ADC, calculating charging power, and entering a step III;
step three: target power calculation: the control unit judges whether the output voltage is larger than a preset trickle voltage, and if the output voltage is larger than the preset trickle voltage, the control unit sets preset target power to be equal to preset constant power; if the output voltage is smaller than or equal to the preset trickle voltage, the control unit further judges whether the preset constant power is larger than the preset trickle power, and if the preset constant power is larger than the preset trickle power, the control unit sets the preset target power to be equal to the preset trickle power; if the preset constant power is smaller than or equal to the preset trickle power, the control unit sets the preset target power to be equal to the preset constant power, and the step four is entered;
the three-purpose step is to realize the output phase under the condition of small output voltage, namely the preset trickle power output phase. The preset trickle power output phase is a protective output phase in the case of too low voltage of the battery to be charged, and the battery to be output is damaged when the output is too fast.
Step four: output overvoltage protection: the control unit judges whether the output voltage is smaller than the preset upper voltage limit, if not, the control unit regulates the control signal to enable the power supply unit to regulate the output voltage downwards through the resistance feedback network, and if so, the control unit further judges whether the output current is smaller than the preset upper current limit. If not, the upper control signal of the control unit enables the power supply unit to downwards regulate the output voltage through the resistor feedback network, and finally the output current is downwards regulated, and if yes, the control unit further judges whether the output power is smaller than the preset target power. If not, the upper control signal of the control unit enables the power supply unit to downwards regulate the output voltage through the resistor feedback network, and finally the output power is downwards regulated. If yes, the control unit regulates down the control signal to enable the power supply unit to regulate up the output voltage through the resistor feedback network, and finally regulates down the output power. In this embodiment, the control signal is implemented by the DAC, and in other embodiments, it may be implemented by other methods;
step five: the control unit enters the sleep power saving program after finishing one control flow, simultaneously starts the timing wake-up program, presets the wake-up time according to the actual situation, and automatically wakes up the MCU control unit after the preset wake-up time arrives, and reenters the step two. The design of the sleep power-saving program and the timed wake-up program reduces the power consumption of the control circuit and improves the power efficiency.
In fig. 1, the magnitude of each branch resistor (Rv, ri, rc, rg) determines the voltage, current, feedback capability of the control, and control range. The current detection unit and the control unit determine the output power and the power regulation precision at a specific output voltage.
In this embodiment, vc is set as the control analog voltage of the control unit, vo is the output voltage of the power supply unit, io is the output current of the power supply unit, vi is the output voltage of the current detection unit, po is the output power of the power supply unit, and Vf is the output voltage of the resistive feedback network. The control unit obtains output voltage Vo and output current Io through an ADC (analog-to-digital conversion) by the voltage detection unit and the current detection unit, and then calculates output power Po. If the output power Po is greater than the preset target power, the control unit regulates the control signal Vc, the resistance feedback network outputs a signal Vf to rise, the power unit regulates the output voltage Vo down according to Vf, and the output current Io is caused to drop when the resistive load output voltage Vo drops, and finally the output power Po drops as shown in fig. 4; and vice versa.
The voltage-current control composite resistor feedback network also has the capability of hardware to automatically suppress output voltage fluctuation. The rising of the output voltage Vo causes the rising of the output voltage Vf of the resistor feedback network, and the power supply unit regulates the output voltage Vo down according to Vf, as shown in fig. 5; and vice versa.
The voltage-current control composite resistor feedback network also has the capability of hardware to suppress output current fluctuations. The output current Vo rises to cause the output voltage Vi of the current detection unit to rise, the output voltage Vf of the resistor feedback network rises, the power supply unit regulates the output voltage Vo down according to Vf, and the output voltage Vo drops for the resistive load to cause the output current Io to drop, as shown in fig. 6; and vice versa.
In this embodiment, the following is set:
R g : ground resistance of feedback network
R v : voltage feedback branch resistance of feedback network
R i : current feedback branch resistance of feedback network
R c : control feedback branch resistance of feedback network
V f : feedback point voltage of power supply unit
V v : constant power circuit output voltage
V i : output voltage of current detection unit
V c : control signal output voltage
V vmax : maximum output voltage of constant power circuit
V vt : trickle first output voltage threshold
V imax : maximum output voltage of current detection unit
V cmax : maximum output voltage of control signal
R D : current sampling resistor of current detection unit
G: voltage amplification factor of current detection unit
σ I→V : the current-voltage conversion coefficient of the current detection unit is shown as omega
ΔV c : control ofControl signal discrimination voltage of unit
ΔV i : when the output voltage is constant, the output adjustment voltage of the current detection unit corresponding to the control signal resolution voltage
ΔP c : output regulated power
P max : maximum output power of the circuit as a whole
Through the embodiment, the lithium battery is charged, and the specific hardware circuit calculation process is as follows:
a) Confirm V vmax 、V vt : according to the characteristics of the lithium battery, V is taken vmax ＝4.2V，V vt ＝2.7V；
b) Determining V imax : according to the characteristics of the current detection unit, V is taken imax ＝3.0V；
c) Determining V cmax : taking V according to the characteristic of the control unit cmax ＝3.0V；
d) Determining V f : taking V according to the characteristics of the power supply unit f ＝0.8V。
e) Calculating R v : to ensure the circuit safety, in V c ＝V cmax V at the time of v ＝0V，V i =0v. R is taken c =1000kΩ, calculated according to the following formula: r is R v ＝2471kΩ；
f) Calculating R i : calculated according to the following formula: r is R i ＝1599kΩ；
g) Calculating R g : calculated according to the following formula: r is R g ＝581kΩ；
h) Rechecking the control range: confirm the control range of the control unit under different output voltages by adjusting V in step e v 、V i Is adjusted. This embodiment is not concerned;
i) Impedance matching accounting of the resistance feedback network: r is regulated in equal proportion according to the impedance characteristics of the feedback end of the power supply unit, the output end of the current detection unit and the output end of the control signal c 、R v 、R i 、R g And (3) obtaining the product. This embodiment is not concerned;
j) Calculation of sigma I→V : r is according to the design of the current detection unit D =0.03Ω, g=101, calculated according to the following formula: sigma (sigma) I→V ＝3.03Ω；
σ I→V ＝R D G
k) Calculation of DeltaV c 、ΔV i : with a 12-bit DAC as the control signal output, deltaV c =0.81 mV, according to the following formula: deltaV i ＝1.3mV
l) calculating ΔP c : when V is v ＝V vmax At the time of DeltaP c The minimum is found according to the following formula: ΔP c ＝1.79mW；
m) calculation
Calculated according to the following formula, if->
Then->
n) calculation
Calculated according to the following formula: />
o) finishing design results: the results of steps l, m and n are arranged in the following table, and the maximum output power P max =2673mW, output power adjustment accuracy Δp c =1.79 mW, the output power adjustment percentage accuracy is < 0.07%;
p) Power adjustment accuracy ΔP c Rechecking a design target: if the power adjustment precision delta P c And (3) recalculating the steps j and k without meeting the design target, and finishing the steps by adjusting the DAC digit. This embodiment is not concerned;
q) maximum output power P max Rechecking a design target: if the maximum output power P max And (3) recalculating the step j without meeting the design target. By adjusting R D G, G. This embodiment is not related.
Based on the same inventive concept, the embodiment of the invention also provides an integrated circuit, which comprises the constant power supply module. The integrated circuit realized by the embodiment can be used as a redundant power supply of the intrinsic safety electrical system, is arranged inside electric equipment, does not need to supply power to the electric equipment through a long cable, not only avoids the failure of the redundant power supply caused by cable faults, but also solves the problem that the power supply distance is too long, so that the voltage drop of the cable is very serious, and achieves the truly effective redundant effect.
Example 2
The embodiment of the invention provides a constant power supply module, which is shown in fig. 7, and comprises a power supply unit, a voltage detection unit, a current detection unit, a control unit and a voltage control composite resistor feedback network. The voltage detection unit is used for detecting the output voltage of the power supply unit, the current detection unit is used for detecting the output current of the power supply unit, and the control unit is used for generating a control signal according to the output voltage and the output current. The voltage control composite resistor feedback network is used for generating a feedback signal according to the output voltage and the control signal and sending the feedback signal to a feedback end of the power supply unit, and the power supply unit adjusts the voltage value of the output voltage according to the feedback signal. The voltage control composite resistor feedback network comprises a voltage feedback branch resistor, a control feedback branch resistor and a grounding resistor. The voltage feedback branch resistor is connected between the output end and the feedback end of the power supply unit, the control feedback branch resistor is connected between the feedback end and the output end of the control unit, and the grounding resistor is connected between the feedback end and the ground of the power supply unit.
Compared with embodiment 1, the embodiment has no current feedback branch resistor, simpler structure and capability of suppressing voltage fluctuation by hardware. The power supply unit, the voltage detection unit, the current detection unit and the control unit are the same as the corresponding units in embodiment 1, and the working procedures are the same, and are not described herein. In other embodiments, the power supply unit, the voltage detection unit, the current detection unit, and the control unit may be different from those in embodiment 1.
Based on the same inventive concept, the embodiment of the invention also provides an integrated circuit, which comprises the constant power output electric module.
Example 3
The embodiment of the invention provides a constant power supply module, which is shown in fig. 8 and comprises a power supply unit, a voltage detection unit, a current detection unit, a control unit and a current control composite resistor feedback network. The voltage detection unit is used for detecting the output voltage of the power supply unit, the current detection unit is used for detecting the output current of the power supply unit, and the control unit is used for generating a control signal according to the output voltage and the output current. The current control composite resistor feedback network is used for integrating the output current and the control signal to generate a feedback signal and sending the feedback signal to the feedback end of the power supply unit, and the power supply unit adjusts the voltage value of the output voltage according to the feedback signal. The current control composite resistor feedback network comprises a current feedback branch resistor, a control feedback branch resistor and a grounding resistor. The current feedback branch resistor is connected between the feedback end of the power supply unit and the output end of the current detection unit, the control feedback branch resistor is connected between the feedback end of the power supply unit and the output end of the control unit, and the grounding resistor is connected between the feedback end of the power supply unit and the ground.
Compared with embodiment 1, the embodiment has no voltage feedback branch resistor, simpler structure and capability of suppressing current fluctuation by hardware. The power supply unit, the voltage detection unit, the current detection unit and the control unit are the same as the corresponding units in embodiment 1, and the working procedures are the same, and are not described herein. In other embodiments, the power supply unit, the voltage detection unit, the current detection unit, and the control unit may be different from those in embodiment 1.
Based on the same inventive concept, the embodiment of the invention also provides an integrated circuit, which comprises the constant power output electric module.
The constant power supply module and the integrated circuit provided in embodiments 1-3 are configured to implement constant power output by adopting the control unit to send a control signal to the power supply unit through the resistor feedback network and adjusting the output voltage of the power supply unit, and the constant power value can be adjusted according to actual conditions. The voltage-current control composite resistor feedback network, the voltage-current control composite resistor feedback network and the current control composite resistor feedback network are designed, so that on one hand, output power, voltage and current fluctuation caused by load fluctuation can be effectively avoided, and on the other hand, when a specific fault occurs in a battery or a circuit, the output voltage cannot exceed a safety range, and reliability and safety are improved. The power supply unit in the embodiment of the invention is a common voltage-stabilized power supply in the market, can be a linear power supply such as LDO (low dropout regulator) or a switching power supply such as buck power supply, and is based on a constant power supply module realized on the basis of the common voltage-stabilized power supply, and has the advantages of simple structure, wide application range and lower cost.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention, and are intended to be included within the scope of the appended claims and description.
Claims (10)
1. The utility model provides a constant power supply module, includes first power supply unit, its characterized in that: the system also comprises a first voltage detection unit, a first current detection unit, a first control unit and a voltage-current control composite resistor feedback network;
the first voltage detection unit is used for detecting a first output voltage of the first power supply unit;
the first current detection unit is used for detecting a first output current of the first power supply unit;
the first control unit is used for generating a first control signal according to a first output voltage and a first output current;
the voltage-current control composite resistor feedback network is used for integrating the first output voltage, the first output current and the first control signal to generate a first feedback signal and sending the first feedback signal to the feedback end of the first power supply unit;
the first power supply unit adjusts the voltage value of the first output voltage according to the first feedback signal;
the voltage-current control composite resistor feedback network comprises a first voltage feedback branch resistor, a first current feedback branch resistor, a first control feedback branch resistor and a first grounding resistor; the first voltage feedback branch resistor is connected between the output end and the feedback end of the first power supply unit; the first current feedback branch resistor is connected between the feedback end of the first power supply unit and the output end of the first current detection unit; the first control feedback branch resistor is connected between the feedback end of the first power supply unit and the output end of the first control unit; the first grounding resistor is connected between the feedback end of the first power supply unit and the ground.
2. The constant power supply module according to claim 1, wherein: the first voltage feedback branch resistor R v First current feedback branch resistor R i And a first grounding resistance R g The calculation formula of (2) is as follows:
wherein V is f A feedback point voltage of the first power supply unit; v (V) v An output voltage of the first power supply unit; v (V) i An output voltage of the first current detection unit; v (V) vmax Is the maximum output voltage of the first power supply unit; v (V) imax Is the maximum output voltage of the first current detection unit; v (V) cmax Is the maximum output voltage of the first control unit.
3. The constant power supply module according to claim 1, wherein: the first control unit is used for generating a first control signal according to a first output voltage and a first output current specifically as follows: the first control unit calculates output power according to the first output voltage and the first output current, and judges whether the output power is smaller than a preset target power or not; if yes, the first control unit generates a first lower control signal; if not, the control unit generates a first up-regulation control signal.
4. The constant power supply module according to claim 1, wherein: the first control unit is further configured to determine whether a first output voltage of the first power supply unit is greater than a preset trickle voltage, and if yes, the first control unit sets a preset target power equal to a preset constant power.
5. The constant power supply module according to claim 4, wherein: if the first output voltage is smaller than or equal to the preset trickle voltage, the first control unit judges whether the preset constant power is larger than the preset trickle power, and if so, the first control unit sets the preset target power to be equal to the preset trickle power; if not, the first control unit sets the preset target power equal to the preset constant power.
6. The constant power supply module according to claim 1, wherein: the first control unit is further configured to determine whether the first output voltage is less than a preset upper voltage limit, and if not, the first control unit generates a second down-regulation control signal and sends the second down-regulation control signal to the first power supply unit, where the first power supply unit down-regulates the output voltage according to the second down-regulation control signal.
7. The constant power supply module according to claim 1, wherein: the first control unit is further configured to determine whether the output current is less than a preset current upper limit, and if not, the first control unit generates a third down-regulation control signal and sends the third down-regulation control signal to the first power supply unit, where the first power supply unit down-regulates the output voltage according to the third down-regulation control signal.
8. The utility model provides a constant power supply module, includes second power supply unit, its characterized in that: the system also comprises a second voltage detection unit, a second current detection unit, a second control unit and a voltage control composite resistor feedback network;
the second voltage detection unit is used for detecting a second output voltage of the second power supply unit;
the second current detection unit is used for detecting a second output current of the second power supply unit;
the second control unit is used for generating a second control signal according to a second output voltage and a second output current;
the voltage control composite resistor feedback network is used for integrating the second output voltage and the second control signal to generate a second feedback signal and transmitting the second feedback signal to the feedback end of the second power supply unit;
the second power supply unit adjusts the voltage value of the second output voltage according to the second feedback signal;
the voltage control composite resistor feedback network comprises a second voltage feedback branch resistor, a second control feedback branch resistor and a second grounding resistor; the second voltage feedback branch resistor is connected between the output end and the feedback end of the second power supply unit; the second control feedback branch resistor is connected between the feedback end of the second power supply unit and the output end of the control unit; the second grounding resistor is connected between the feedback end of the second power supply unit and the ground.
9. The utility model provides a constant power supply module, includes third power supply unit, its characterized in that: the system also comprises a third voltage detection unit, a third current detection unit, a third control unit and a current control composite resistor feedback network;
the third voltage detection unit is used for detecting a third output voltage of the third power supply unit;
the third current detection unit is used for detecting a third output current of the third power supply unit;
the third control unit is used for generating a third control signal according to a third output voltage and a third output current;
the current control composite resistor feedback network is used for integrating a third output current and a third control signal to generate a third feedback signal and sending the third feedback signal to the feedback end of the third power supply unit;
the third power supply unit adjusts the voltage value of the third output voltage according to the feedback signal;
the current control composite resistor feedback network comprises a second current feedback branch resistor, a third control feedback branch resistor and a third grounding resistor; the second current feedback branch resistor is connected between the feedback end of the third power supply unit and the output end of the third current detection unit; the third control feedback branch resistor is connected between the feedback end of the third power supply unit and the output end of the third control unit; the third grounding resistor is connected between the feedback end of the third power supply unit and the ground.
10. An integrated circuit, characterized in that: a constant power supply module comprising any one of claims 1-7.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105992432A (en) * | 2015-02-05 | 2016-10-05 | 台达电子工业股份有限公司 | Power supply circuit for LED load |
| CN107801274A (en) * | 2017-11-10 | 2018-03-13 | 深圳市垅运照明电器有限公司 | A kind of constant power output LED drive power and its constant power output method |
| EP3457516A1 (en) * | 2017-09-18 | 2019-03-20 | Asia Pacific Fuel Cell Technologies, Ltd. | Power controller, power supply system and control method thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI383282B (en) * | 2009-04-30 | 2013-01-21 | Ind Tech Res Inst | Constant power control apparatus and a controlling method thereof |
| KR101680792B1 (en) * | 2010-08-18 | 2016-11-30 | 삼성전자 주식회사 | Electric device and control method of the same |
| CN204480104U (en) * | 2015-01-26 | 2015-07-15 | 深圳市晶利德实业有限公司 | A kind of constant power output circuit |
| CN112074043A (en) * | 2020-10-13 | 2020-12-11 | 深圳茂硕电子科技有限公司 | Self-adaptive constant-power LED driving power supply |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105992432A (en) * | 2015-02-05 | 2016-10-05 | 台达电子工业股份有限公司 | Power supply circuit for LED load |
| EP3457516A1 (en) * | 2017-09-18 | 2019-03-20 | Asia Pacific Fuel Cell Technologies, Ltd. | Power controller, power supply system and control method thereof |
| CN107801274A (en) * | 2017-11-10 | 2018-03-13 | 深圳市垅运照明电器有限公司 | A kind of constant power output LED drive power and its constant power output method |
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