CN204578374U - Power supply and output loading regulation compensating circuit thereof - Google Patents
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Abstract
The utility model discloses power supply and output loading regulation compensating circuit thereof, the output loading regulation compensating circuit of power supply, obtain the output current of power circuit by current sample module and output current is converted to sampled voltage, by the sampled value of amplification module amplified current sampling module, the signal exported by amplification module by MCU control module carries out analog-to-digital conversion, and export corresponding offset current to control loop module according to sampled value, corresponding bucking voltage is produced according to offset current by control loop module, and bucking voltage is superposed with reference voltage be stabilized to reference voltage, electric power output voltage is made to be its nominal voltage, thus effectively improve the load regulation of power supply.
Description
Technical field
The utility model relates to power technology, particularly a kind of power supply and output loading regulation compensating circuit thereof.
Background technology
Load regulation (LOAD REGULATION) refers to and shows as the change that the change of power source loads can cause power supply to export: when load increases, and exports and reduces; When contrary load reduces, then export rising.Load regulation weighs the index of power supply quality.It is less that good power source loads changes the exporting change caused, and is often referred to and is designated as 3%-5%.Load regulation=(time unloaded output voltage-full load output voltage)/(during nominal load output voltage) * 100%, this is an important indicator of stabilized voltage power supply, embody the corresponding situation of change of output voltage of the stabilized voltage power supply when load current changes, when usually changing to rated maximum current with output current from 0, the variable quantity of output voltage and the percent value of output voltage represent.The output current of such as certain 5V D.C. regulated power supply is increased to maximum current 1A from 0, and its output voltage has dropped to 4.50V from 5.00V, and drop value 0.5V, divided by nominal output voltage 5V, obtains 10%, the load regulation of Here it is this power supply.
At present, most of power supply does not have Compensation Design, and as the power supply of nominal 48V output voltage, after the impedance of its common mode inductance and PCB cabling divides a part of voltage, its output voltage, lower than 48V, causes its load regulation large.
Thus prior art need to improve.
Utility model content
In view of above-mentioned the deficiencies in the prior art part, the purpose of this utility model is to provide power supply and output loading regulation compensating circuit thereof, can sample to electric power output voltage, and makes electric power output voltage be its nominal voltage according to sampled value bucking voltage.
In order to achieve the above object, the utility model takes following technical scheme:
An output loading regulation compensating circuit for power supply, be connected with the power circuit of power supply, it comprises:
For obtaining the output current of power circuit, and output current is converted to the current sample module of sampled voltage;
For the amplification module of the sampled value of amplified current sampling module;
Signal for being exported by amplification module carries out analog-to-digital conversion, and exports corresponding offset current to the MCU control module of control loop module according to sampled value;
For producing corresponding bucking voltage according to offset current, and bucking voltage is superposed the control loop module being stabilized to reference voltage with reference voltage;
Described power circuit, current sample module, amplification module, MCU control module, control loop module are in turn connected to form loop.
In the output loading regulation compensating circuit of described power supply, described MCU control module comprises:
Analog signal for being exported by amplification module is converted to digital signal, and according to the sampled value that amplification module exports, exports the DSP unit of the pwm signal of corresponding duty ratio;
For producing the driver element of corresponding drive current according to described pwm signal;
For increasing the current setting unit of the input current of control loop module according to drive current;
Described amplification module, DSP unit, driver element, current setting unit, control loop module be connected successively with power circuit.
In the output loading regulation compensating circuit of described power supply, described current sample module comprises the first resistance and the second resistance, one end of described first resistance is all connected the first input end of amplification module with one end of the second resistance, and the other end of the first resistance and the other end of the second resistance are all connected the 3rd end of the common mode inductance of power circuit, the second input of amplification module and ground.
In the output loading regulation compensating circuit of described power supply, described amplification module comprises: operational amplifier, 3rd resistance, 4th resistance, 5th resistance, 6th resistance and the 7th resistance, one end of described 3rd resistance is the first input end of amplification module, connect one end of the first resistance and one end of the second resistance, the inverting input of the other end concatenation operation amplifier of the 3rd resistance, also by the output of the 5th resistance concatenation operation amplifier, one end of 4th resistance is the second input of amplification module, connect the 3rd end of the other end of the first resistance and the other end of the second resistance and common mode inductance, the normal phase input end of the other end concatenation operation amplifier of the 4th resistance, also by the 6th grounding through resistance, the output of described operational amplifier is the output of amplification module, MCU control module is connected by the 7th resistance.
In the output loading regulation compensating circuit of described power supply, described amplification module also comprises the first electric capacity, and one end of described first electric capacity connects MCU control module, also passes through the output of the 7th resistance concatenation operation amplifier, the other end ground connection of the first electric capacity.
In the output loading regulation compensating circuit of described power supply, described amplification module also comprises Schottky diode, 1st end ground connection of described Schottky diode, 2nd end of Schottky diode connects 3.3V feeder ear, and the 3rd end of Schottky diode connects one end of MCU control module and the first electric capacity, also by the output of the 7th resistance concatenation operation amplifier.
In the output loading regulation compensating circuit of described power supply, described DSP unit comprises dsp processor, the 8th resistance, the 9th resistance, the second electric capacity and the 3rd electric capacity; Driver element comprises: driving chip; Current setting unit comprises the first metal-oxide-semiconductor, the second metal-oxide-semiconductor, the 3rd metal-oxide-semiconductor and the first transformer; Control loop module comprises the second transformer;
The RA2/AN2 end of described dsp processor connects the output of amplification module by the 7th resistance, the RB1/AN6 end of dsp processor is by the second capacity earth, the RB12/PWM3L end of dsp processor passes through the ground connection of the 8th resistance and the 9th resistance successively, the RA3/PWM1L end of dsp processor connects the INB end of driving chip, the RB14/PWM2L end of dsp processor connects the INA end of driving chip, and the VDDCORE end of dsp processor is by the 3rd capacity earth;
The OUTB of described driving chip holds the Same Name of Ends of the grid of connection first metal-oxide-semiconductor and the armature winding of the first transformer, the source ground of the first metal-oxide-semiconductor, and the drain electrode of the first metal-oxide-semiconductor connects the different name end of the armature winding of the first transformer;
The different name end of the first secondary winding of the first transformer connects the Same Name of Ends of the source electrode of the 3rd metal-oxide-semiconductor and the armature winding of the second transformer, and the Same Name of Ends of the first secondary winding of the first transformer connects the grid of the 3rd metal-oxide-semiconductor, the drain electrode of the 3rd metal-oxide-semiconductor connects DC_BUS-feeder ear;
The different name end of the second subprime winding of the first transformer connects source electrode and the DC_BUS-feeder ear of the second metal-oxide-semiconductor, the different name end that Same Name of Ends connects the grid of the second metal-oxide-semiconductor, the drain electrode of the second metal-oxide-semiconductor connects the armature winding of the second transformer of the second subprime winding of the first transformer.
Have a power supply for load compensation function, comprise power circuit and output loading regulation compensating circuit, described power circuit connects the output loading regulation compensating circuit of power supply.
Compared to prior art, the power supply that the utility model provides and output loading regulation compensating circuit thereof, obtain the output current of power circuit by current sample module and output current is converted to sampled voltage, by the sampled value of amplification module amplified current sampling module, the signal exported by amplification module by MCU control module carries out analog-to-digital conversion, and export corresponding offset current to control loop module according to sampled value, corresponding bucking voltage is produced according to offset current by control loop module, and bucking voltage is superposed with reference voltage be stabilized to reference voltage, electric power output voltage is made to be its nominal voltage, thus effectively improve the load regulation of power supply.
Accompanying drawing explanation
The circuit diagram of the output loading regulation compensating circuit of the power supply that Fig. 1 provides for the utility model embodiment.
Embodiment
The utility model provides a kind of power supply and output loading regulation compensating circuit thereof, for making the purpose of this utility model, technical scheme and effect clearly, clearly, further describes the utility model referring to the accompanying drawing embodiment that develops simultaneously.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
Refer to Fig. 1, the utility model provides a kind of output loading regulation compensating circuit of power supply to comprise: current sample module 10, amplification module 20 and MCU control module 30, described power circuit, current sample module 10, amplification module 20, MCU control module 30 and control loop module 40 are in turn connected to form loop.
The present embodiment obtains the output current of power circuit by current sample module 10 and output current is converted to sampled voltage, by the sampled value of amplification module 20 amplified current sampling module 10, the signal exported by amplification module 20 by MCU control module 30 carries out analog-to-digital conversion, and export corresponding offset current to control loop module according to sampled value, corresponding bucking voltage is produced according to offset current by control loop module, and bucking voltage is superposed with reference voltage be stabilized to reference voltage, electric power output voltage is made to be its nominal voltage, thus effectively improve the load regulation of power supply.
Wherein, MCU control module 30 comprises: the analog signal for being exported by amplification module 20 is converted to digital signal, and according to the sampled value that amplification module 20 exports, export the DSP unit of the pwm signal of corresponding duty ratio, for increasing the current setting unit of the input current of control loop module according to drive current.Described amplification module 20, DSP unit, driver element, current setting unit, control loop module be connected successively with power circuit.
Described current sample module 10 comprises the first resistance R1 and the second resistance R2, one end and one end of the second resistance R2 of described first resistance R1 are all connected the first input end of amplification module 20, and the other end and the other end of the second resistance R2 of the first resistance R1 are all connected the 3rd end of the common mode inductance of power circuit, the second input of amplification module 20 and ground.
Described first resistance R1 and the second resistance R2 mainly samples the output current of common mode inductance of power circuit, and is divided by the first resistance R1 and the second resistance R2 and obtain in sampled voltage input amplification module 20.
Please continue to refer to Fig. 1, described amplification module 20 comprises: operational amplifier U1, 3rd resistance R3, 4th resistance R4, 5th resistance R5, 6th resistance R6 and the 7th resistance R7, one end of described 3rd resistance R3 is the first input end of amplification module 20, connect one end of the first resistance R1 and one end of the second resistance R2, the inverting input of the other end concatenation operation amplifier U1 of the 3rd resistance R3, also by the output of the 5th resistance R5 concatenation operation amplifier U1, one end of 4th resistance R4 is the second input of amplification module 20, connect the 3rd end of the other end of the first resistance R1 and the other end of the second resistance R2 and common mode inductance, the normal phase input end of the other end concatenation operation amplifier U1 of the 4th resistance R4, also by the 6th resistance R6 ground connection, the output of described operational amplifier U1 is the output of amplification module, it connects MCU control module 30 by the 7th resistance R7.
Wherein, the model of operational amplifier U1 is LM224A, exports after input voltage quadruplication by arranging the corresponding magnification ratio factor.In the present embodiment, described amplification module 20 also comprises: the first electric capacity C1, and one end of described first electric capacity C1 connects MCU control module 30, also passes through the output of the 7th resistance R7 concatenation operation amplifier U1, the other end ground connection of the first electric capacity C1.This first electric capacity C1 mainly strobes, and prevents interference signal from inputting in MCU control module 30.
Further, described amplification module 20 also comprises Schottky diode D1, the model of described Schottky diode D1 is BAT54S, its 1st end ground connection, 2nd end of Schottky diode D1 connects 3.3V feeder ear, and the 3rd end of Schottky diode D1 connects one end of MCU control module 30 and the first electric capacity C1, also by the output of the 7th resistance R7 concatenation operation amplifier U1.
Please continue to refer to Fig. 1, described DSP unit comprises dsp processor U2, the 8th resistance R8, the 9th resistance R9, the second electric capacity C2 and the 3rd electric capacity C3; Driver element comprises: driving chip U3; Current setting unit comprises the first metal-oxide-semiconductor Q1, the second metal-oxide-semiconductor Q2, the 3rd metal-oxide-semiconductor Q4 and the first transformer T1; Control loop module comprises the second transformer T2.Described first transformer is isolating transformer.First metal-oxide-semiconductor Q1, the second metal-oxide-semiconductor Q2, the 3rd metal-oxide-semiconductor Q3 are N metal-oxide-semiconductor.
Because sample rate current is from the secondary acquisition of the second transformer, in order to prevent interference, adopt the first transformer to be isolated by the signal of the primary and secondary of the second transformer, bucking voltage is calculated accurately
The RA2/AN2 of described dsp processor U2 holds the output by the 7th resistance R7 concatenation operation amplifier U1, the RB1/AN6 end of dsp processor U2 is by the second electric capacity C2 ground connection, the RB12/PWM3L end of dsp processor U2 is successively by the ground connection of the 8th resistance R8 and the 9th resistance R9, the RA3/PWM1L end of dsp processor U2 connects the INB end of driving chip, the RB14/PWM2L end of dsp processor U2 connects the INA end of driving chip, and the VDDCORE end of dsp processor U2 is by the 3rd electric capacity C3 ground connection.
The RA2/AN2 of described dsp processor holds the output by the 7th resistance concatenation operation amplifier, the RB1/AN6 end of dsp processor is by the second capacity earth, the RB12/PWM3L end of dsp processor passes through the ground connection of the 8th resistance and the 9th resistance successively, the RA3/PWM1L end of dsp processor connects the INB end of driving chip, the RB14/PWM2L end of dsp processor connects the INA end of driving chip, and the VDDCORE end of dsp processor is by the 3rd capacity earth.
The OUTB of described driving chip U3 holds the Same Name of Ends of the grid of connection first metal-oxide-semiconductor Q1 and the armature winding of the first transformer T1, and the source ground of the first metal-oxide-semiconductor Q1, the drain electrode of the first metal-oxide-semiconductor Q1 connects the different name end of the armature winding of the first transformer T1.
The different name end of first secondary winding of the first transformer T1 connects the Same Name of Ends of the source electrode of the 3rd metal-oxide-semiconductor Q3 and the armature winding of the second transformer T2, and the Same Name of Ends of first secondary winding of the first transformer T1 connects the grid of the 3rd metal-oxide-semiconductor Q3, the drain electrode of the 3rd metal-oxide-semiconductor Q3 connects DC_BUS-feeder ear.
The different name end of the second subprime winding of the first transformer T1 connects source electrode and the DC_BUS-feeder ear of the second metal-oxide-semiconductor Q2, the different name end that Same Name of Ends connects the grid of the second metal-oxide-semiconductor Q2, the drain electrode of the second metal-oxide-semiconductor Q2 connects the armature winding of the second transformer T2 of the second subprime winding of the first transformer T1.
Wherein, the model of dsp processor U2 is DSPPIC33FJI6GS502, and the acquisition of bucking voltage is directly obtained by the inner integrated circuit module of DSU processor, and export corresponding attack a vital point than pwm signal.The signal that operational amplifier U1 exports, from RA2/AN2 end input dsp processor U2, is carried out analog-to-digital conversion by the inside of dsp processor U2, is obtained bucking voltage, output pwm signal according to sample rate current.In other embodiments, it is outside that A/D converting unit also can be arranged on dsp processor U2, specifically can design according to the model of dsp processor U2.And the calculating of bucking voltage also by software simulating, can not be described further herein.
In the output loading regulation compensating circuit of power supply of the present utility model, the electric current that power supply exports is sampled through two sampling resistors, and will send in dsp processor U2 after the voltage amplification at sampling resistor two ends by operational amplifier U1, dsp processor U2 adjusts the duty ratio of the pwm signal that it exports according to the size of sample rate current, thus control the ON time of each metal-oxide-semiconductor, the electric current of corresponding increase by second primary winding, make the voltage drop that the corresponding bucking voltage of the second transformer coupled generation is brought for offsetting output resistance in power circuit, thus ensure output voltage not by the impact of load.
The utility model also provides a kind of power supply with load compensation function, it comprises power circuit and output loading regulation compensating circuit, described power circuit comprises the electronic components such as inductance L 1, common mode inductance L2, some diodes, some electric capacity, output interface J1, the output loading regulation compensating circuit of power supply connects power circuit, for compensating the load regulation of power circuit, make the voltage stabilization of output interface J1 at nominal voltage.Due to above to the output loading regulation compensating circuit of power supply, be not described further herein.
In order to better understand the utility model, below in conjunction with Fig. 1, the compensation way of power supply of the present utility model is described in detail:
In a power, inductance L 1, common mode inductance L2 and PCB cabling all have certain impedance, when power supply exports, are and assign to certain voltage, electric power output voltage is reduced.The utility model is sampled to the electric current of the 3rd end of common mode inductance L2 by the first resistance R1 and the second resistance R2, and a very little voltage drop (being generally mV level) is formed at the two ends of two sampling resistors, this voltage is sent in dsp processor U2 after operational amplifier U1 amplifies, analog-to-digital conversion is carried out through dsp processor U2 inside, dsp processor U2 is according to the size adjustment bucking voltage of sample rate current again, the pwm signal exporting corresponding duty ratio according to bucking voltage is held to the INA of UCC27524 chip, the OUTB end of UCC27524 chip and the output current of OUTA end are increased, thus increase corresponding first metal-oxide-semiconductor Q1, the grid current of the second metal-oxide-semiconductor Q2 and the 3rd metal-oxide-semiconductor Q3, this electric current is by the corresponding bucking voltage of the second transformer coupled generation, and be superimposed on the secondary reference voltage of transformer, thus power circuit output voltage is compensated.As power supply nominal voltage be 48V time, after being compensated by the present invention, the reference voltage of 48V can be exported.
When compensation calculation, the utility model carries out calculating and being compensated voltage according to sampled value: Vc=I*R, wherein, Vc is bucking voltage, I is the electric current exported in the power supply a certain moment, and R is the output impedance (generally comprising the impedance of power supply output loop, the impedance of current sampling resistor, the impedance of output common mode inductance) of power supply.
As can be seen from the formula of bucking voltage, when output current increases, bucking voltage also increases, the line pressure that the impedance that this bucking voltage increased just can compensate output loop brings falls (pressure drop as inductance L 1, common mode inductance L2 and PCB cabling), thus ensure that output voltage remains unchanged, in other words by after this compensation, the load regulation of power supply can effectively be improved.
In sum, the power supply that the utility model provides and output loading regulation compensating circuit thereof, obtain the output current of power circuit by current sample module and output current is converted to sampled voltage, by the sampled value of amplification module amplified current sampling module, the signal exported by amplification module by MCU control module carries out analog-to-digital conversion, and export corresponding offset current to power circuit according to sampled value, make electric power output voltage be its nominal voltage, thus effectively improve the load regulation of power supply.
Be understandable that; for those of ordinary skills; can be equal to according to the technical solution of the utility model and utility model design thereof and replace or change, and all these change or replace the protection range that all should belong to the claim appended by the utility model.
Claims (8)
1. an output loading regulation compensating circuit for power supply, is connected with the power circuit of power supply, it is characterized in that, comprising:
For obtaining the output current of power circuit, and output current is converted to the current sample module of sampled voltage;
For the amplification module of the sampled value of amplified current sampling module;
Signal for being exported by amplification module carries out analog-to-digital conversion, and exports corresponding offset current to the MCU control module of control loop module according to sampled value;
For producing corresponding bucking voltage according to offset current, and bucking voltage is superposed the control loop module being stabilized to reference voltage with reference voltage;
Described power circuit, current sample module, amplification module, MCU control module, control loop module are in turn connected to form loop.
2. the output loading regulation compensating circuit of power supply according to claim 1, it is characterized in that, described MCU control module comprises:
Analog signal for being exported by amplification module is converted to digital signal, and according to the sampled value that amplification module exports, exports the DSP unit of the pwm signal of corresponding duty ratio;
For producing the driver element of corresponding drive current according to described pwm signal;
For increasing the current setting unit of the input current of control loop module according to drive current;
Described amplification module, DSP unit, driver element, current setting unit, control loop module be connected successively with power circuit.
3. the output loading regulation compensating circuit of power supply according to claim 1, it is characterized in that, described current sample module comprises the first resistance and the second resistance, one end of described first resistance is all connected the first input end of amplification module with one end of the second resistance, and the other end of the first resistance and the other end of the second resistance are all connected the 3rd end of the common mode inductance of power circuit, the second input of amplification module and ground.
4. the output loading regulation compensating circuit of power supply according to claim 3, it is characterized in that, described amplification module comprises: operational amplifier, 3rd resistance, 4th resistance, 5th resistance, 6th resistance and the 7th resistance, one end of described 3rd resistance is the first input end of amplification module, connect one end of the first resistance and one end of the second resistance, the inverting input of the other end concatenation operation amplifier of the 3rd resistance, also by the output of the 5th resistance concatenation operation amplifier, one end of 4th resistance is the second input of amplification module, connect the 3rd end of the other end of the first resistance and the other end of the second resistance and common mode inductance, the normal phase input end of the other end concatenation operation amplifier of the 4th resistance, also by the 6th grounding through resistance, the output of described operational amplifier is the output of amplification module, MCU control module is connected by the 7th resistance.
5. the output loading regulation compensating circuit of power supply according to claim 4, it is characterized in that, described amplification module also comprises the first electric capacity, one end of described first electric capacity connects MCU control module, also passes through the output of the 7th resistance concatenation operation amplifier, the other end ground connection of the first electric capacity.
6. the output loading regulation compensating circuit of power supply according to claim 4, it is characterized in that, described amplification module also comprises Schottky diode, 1st end ground connection of described Schottky diode, 2nd end of Schottky diode connects 3.3V feeder ear, and the 3rd end of Schottky diode connects one end of MCU control module and the first electric capacity, also by the output of the 7th resistance concatenation operation amplifier.
7. the output loading regulation compensating circuit of power supply according to claim 2, is characterized in that, described DSP unit comprises dsp processor, the 8th resistance, the 9th resistance, the second electric capacity and the 3rd electric capacity; Driver element comprises: driving chip; Current setting unit comprises the first metal-oxide-semiconductor, the second metal-oxide-semiconductor, the 3rd metal-oxide-semiconductor and the first transformer; Control loop module comprises the second transformer;
The RA2/AN2 end of described dsp processor connects the output of amplification module by the 7th resistance, the RB1/AN6 end of dsp processor is by the second capacity earth, the RB12/PWM3L end of dsp processor passes through the ground connection of the 8th resistance and the 9th resistance successively, the RA3/PWM1L end of dsp processor connects the INB end of driving chip, the RB14/PWM2L end of dsp processor connects the INA end of driving chip, and the VDDCORE end of dsp processor is by the 3rd capacity earth;
The OUTB of described driving chip holds the Same Name of Ends of the grid of connection first metal-oxide-semiconductor and the armature winding of the first transformer, the source ground of the first metal-oxide-semiconductor, and the drain electrode of the first metal-oxide-semiconductor connects the different name end of the armature winding of the first transformer;
The different name end of the first secondary winding of the first transformer connects the Same Name of Ends of the source electrode of the 3rd metal-oxide-semiconductor and the armature winding of the second transformer, and the Same Name of Ends of the first secondary winding of the first transformer connects the grid of the 3rd metal-oxide-semiconductor, the drain electrode of the 3rd metal-oxide-semiconductor connects DC_BUS-feeder ear;
The different name end of the second subprime winding of the first transformer connects source electrode and the DC_BUS-feeder ear of the second metal-oxide-semiconductor, the different name end that Same Name of Ends connects the grid of the second metal-oxide-semiconductor, the drain electrode of the second metal-oxide-semiconductor connects the armature winding of the second transformer of the second subprime winding of the first transformer.
8. one kind has the power supply of load compensation function, comprise power circuit, it is characterized in that, also comprise the output loading regulation compensating circuit of the power supply as described in claim 1-7 any one, described power circuit connects the output loading regulation compensating circuit of power supply.
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| CN201520238053.7U CN204578374U (en) | 2015-04-20 | 2015-04-20 | Power supply and output loading regulation compensating circuit thereof |
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| CN201520238053.7U CN204578374U (en) | 2015-04-20 | 2015-04-20 | Power supply and output loading regulation compensating circuit thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106793269A (en) * | 2016-12-07 | 2017-05-31 | 横店集团得邦照明股份有限公司 | One kind compensation drive device and its implementation |
| CN111200363A (en) * | 2018-11-19 | 2020-05-26 | 深南电路股份有限公司 | Switching power supply and electronic device |
| CN111917304A (en) * | 2020-08-10 | 2020-11-10 | 北京新雷能科技股份有限公司 | Digital power supply |
| CN113035123A (en) * | 2021-02-02 | 2021-06-25 | 深圳精智达技术股份有限公司 | Multi-path homologous independent compensation driving power supply device |
| CN115940587A (en) * | 2023-03-14 | 2023-04-07 | 深圳市凌康技术有限公司 | Power supply, output load regulation rate compensation circuit thereof and voltage regulation method |
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2015
- 2015-04-20 CN CN201520238053.7U patent/CN204578374U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106793269A (en) * | 2016-12-07 | 2017-05-31 | 横店集团得邦照明股份有限公司 | One kind compensation drive device and its implementation |
| CN111200363A (en) * | 2018-11-19 | 2020-05-26 | 深南电路股份有限公司 | Switching power supply and electronic device |
| CN111917304A (en) * | 2020-08-10 | 2020-11-10 | 北京新雷能科技股份有限公司 | Digital power supply |
| CN113035123A (en) * | 2021-02-02 | 2021-06-25 | 深圳精智达技术股份有限公司 | Multi-path homologous independent compensation driving power supply device |
| CN115940587A (en) * | 2023-03-14 | 2023-04-07 | 深圳市凌康技术有限公司 | Power supply, output load regulation rate compensation circuit thereof and voltage regulation method |
| CN115940587B (en) * | 2023-03-14 | 2023-07-14 | 深圳市凌康技术有限公司 | Power supply, output load adjustment rate compensation circuit and voltage adjustment method thereof |
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