CN205051583U - Switching power supply - Google Patents
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- CN205051583U CN205051583U CN201520517283.7U CN201520517283U CN205051583U CN 205051583 U CN205051583 U CN 205051583U CN 201520517283 U CN201520517283 U CN 201520517283U CN 205051583 U CN205051583 U CN 205051583U
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Abstract
The utility model discloses a switching power supply, treater pass through the external data interface and receive the control parameter input, and appointed electric current to the current feedback loop that corresponds with control parameter is exported in output and appointed voltage to the voltage feedback loop that control parameter corresponds, behind the output voltage that appointed voltage of voltage feedback loop receipt and output sampling circuit gathered, the corresponding voltage feedback controlled quantity of output is given switching power supply control circuit, behind the output current that appointed electric current of current feedback loop receipt and output sampling circuit gathered, output current feedback controlled quantity is for switching power supply control circuit, switching power supply control circuit is through the great controlled quantity in the current feedback controlled quantity received and the voltage feedback control volume, the operating condition of control itself, and drive switch alternaties rectifier circuit and supplies power for the load through exporting sampling circuit. The utility model discloses can be through software control switching power supply's output electric quantity, with the power hardware design normalization of the different output requirements of in certain extent.
Description
Technical field
The utility model relates to field of switch power, particularly relates to a kind of convenient Switching Power Supply controlled.
Background technology
Switching Power Supply is (English: SwitchingModePowerSupply), also known as exchange type power, switch converters, be a kind of high frequency device for converting electric energy, its function is by the voltage of a position standard, is converted to the required voltage of user side or electric current through multi-form framework.
Switching Power Supply, because volume is little, lightweight, efficiency advantages of higher, as the parts that various electronic product is powered, has obtained application widely.For in most product, the output characteristic of Switching Power Supply is fixing, for load provides the power supply of fixed voltage, electric current and power.In some specific application scenarios, in such as LED illumination product, the drive current of LED, driving voltage need the output current of the different size such as LED power, LED drive current, the series/parallel connected mode setting power supply according to reality, voltage and power, this just causes LED drive power of a great variety, type selecting is complicated, for batch production brings certain difficulty.For the LED illumination product having requirement of light regulation, also need the output voltage, the electric current that adjust its power supply in real time, the Switching Power Supply for traditional fixing output current, voltage and power cannot meet these application demands.
Utility model content
Main purpose of the present utility model can be passed through to change controling parameters, the isoparametric Switching Power Supply of control switch electric power output voltage, electric current for providing one.
In order to realize above-mentioned utility model object, the utility model proposes a kind of Switching Power Supply, comprise and export sample circuit, switch change-over/current rectifying and wave filtering circuit, switching power source control circuit, voltage feedback loop, current feedback loop, processor and external data interface;
Described processor receives controling parameters input by external data interface, and exports the given voltage corresponding with controling parameters to voltage feedback loop, and/or exports the specified current flow corresponding with controling parameters to current feedback loop;
After the given voltage of the output voltage that described voltage feedback loop reception output sample circuit collects and processor output, export corresponding Voltage Feedback controlled quentity controlled variable to described switching power source control circuit; And/or after the specified current flow of the output current that described current feedback loop reception output sample circuit collects and processor output, output current feedback control amount gives described switching power source control circuit;
Described switching power source control circuit is by the larger controlled quentity controlled variable in the Current Feedback Control amount that receives and Voltage Feedback controlled quentity controlled variable, and the operating state of control itself, driving switch conversion/rectification circuit passes through output sample circuit powering load.
Further, described external data interface receives the control command comprising remote controller, RS485 bus, RS232 bus, I2C bus, spi bus or power line carrier, PLC.
Further, described voltage feedback loop comprises operational amplifier U4B, resistance R11, resistance R12, resistance R13, resistance R14, electric capacity C11 and electric capacity C12;
The in-phase input end of described operational amplifier U4B is by resistance R12 ground connection; Connect described output sample circuit by described resistance R11 and receive described sampled voltage;
The pin that the inverting input of described operational amplifier U4B connects described processor by described resistance R13 receives described given voltage, and the inverting input of described operational amplifier U4B also connects one end of described electric capacity C11, the other end ground connection of electric capacity C11;
The output of described calculation amplifier U4B connects the input of a diode D6, the output of diode D6 connects described switching power source control circuit, and the output of described operational amplifier U4B is also by the resistance R14 of series connection and the inverting input of electric capacity C12 concatenation operation amplifier U4B.
Further, described current feedback loop comprises operational amplifier U4A, resistance R6, resistance R7, resistance R8, resistance R9, resistance R10, electric capacity C9 and electric capacity C10;
The in-phase input end of described operational amplifier U4A is by the electric capacity C9 of described parallel connection and resistance R6 ground connection, and the pin also connecting described processor by resistance R7 receives described specified current flow;
The inverting input of described operational amplifier U4A connects a fixed reference potential by resistance R8, and the inverting input of operational amplifier U4A also connects described output sample circuit by resistance R9 and receives described sample rate current;
The output of described operational amplifier U4A connects a diode D5, the output of diode D5 connects described switching power source control circuit, and the output of described operational amplifier U4A is also by the resistance R10 of series connection and the inverting input of electric capacity C10 concatenation operation amplifier U4A.
Further, described Switching Power Supply also comprises display unit, described processor receives the sample rate current and/or sampled voltage that export sample circuit collection and carries out analog-to-digital conversion process, the voltage value after described display unit display analog-to-digital conversion process and/or current values.
Switching Power Supply of the present utility model, processor obtains according to exporting the controling parameters requiring setting by external data interface, or in processor, load default controling parameters, then the given voltage of corresponding controling parameters and specified current flow is exported to voltage feedback loop and current feedback loop, thus the operating state of adjustment Switching Power Supply.Enormously simplify the hardware designs of Switching Power Supply, make the different power supply hardware designs normalization exporting requirement within the specific limits, identical hardware circuit only needs to load different controling parameters can realize different voltage, electric current, the output of power, greatly reduce the batch production cost of the Switching Power Supply that specification is similar to, simplify the configuration of product, the Contrast tuned imaging to power supply can also be realized, to greatly throw light on by simplified intelligent, the product design of Smart Home class, effective acceleration intelligent lighting, the product development of Smart Home class also reduces intelligent lighting, the cost of the product of Smart Home class.
Accompanying drawing explanation
Fig. 1 is the theory structure schematic diagram of the Switching Power Supply of the utility model one embodiment;
Fig. 2 is the physical circuit figure of the voltage feedback loop of the utility model one embodiment;
Fig. 3 is the physical circuit figure of the current feedback loop of the utility model one embodiment;
Fig. 4 is the physical circuit figure of the Switching Power Supply of the utility model one embodiment;
Fig. 5 is the flow chart of the control method of the Switching Power Supply of the utility model one embodiment;
Fig. 6 is that the Switching Power Supply of the utility model one embodiment exports the flow chart controlled;
Fig. 7 is the flow chart of the control method of the Switching Power Supply of another embodiment of the utility model.
The realization of the utility model object, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing.
Embodiment
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.
With reference to Fig. 1, there is provided a kind of Switching Power Supply in the utility model embodiment, comprise power input 100, power output end 200, export sample circuit 300, switch change-over/current rectifying and wave filtering circuit 400, switching power source control circuit 500, voltage feedback loop 600, current feedback loop 700, processor 800 and external data interface 801;
Described power input 100 connects described switch change-over/current rectifying and wave filtering circuit 400, switch change-over/current rectifying and wave filtering circuit 400 connects described output sample circuit 300, exports sample circuit 300 and connects described power supply out-put supply, voltage feedback loop 600 and current feedback loop 700 respectively; Described voltage feedback loop 600 also connects described switching power source control circuit 500 and described processor 800 respectively; Described current feedback loop 700 also connects described switching power source control circuit 500 and described processor 800 respectively; Described switching power source control circuit 500 connects described switch change-over/current rectifying and wave filtering circuit 400;
In the present embodiment, above-mentioned processor 800 receives controling parameters input by external data interface 801, or in processor 800, load the controling parameters preset, and export the given voltage corresponding with controling parameters to voltage feedback loop 600, and/or export the specified current flow corresponding with controling parameters to current feedback loop 700, that is processor 800 both only can export given voltage, also only can export specified current flow, given voltage and specified current flow can also be exported simultaneously;
After the given voltage of the output voltage that described voltage feedback loop 600 reception output sample circuit 300 collects and processor 800 output, export corresponding Voltage Feedback controlled quentity controlled variable to described switching power source control circuit 500, and/or after described current feedback loop 700 receives and export output current that sample circuit 300 collects and the specified current flow that processor 800 exports, output current feedback control amount gives described switching power source control circuit 500; Namely three kinds of output situations of corresponding above-mentioned specified current flow and given voltage, corresponding feedback control amount can be obtained, such as, if processor 800 output only exports given voltage, voltage feedback loop 600 is so only had to obtain Voltage Feedback controlled quentity controlled variable, if processor 800 exports specified current flow, current feedback loop 700 is so only had to obtain Current Feedback Control amount, if processor 800 exports given voltage and specified current flow simultaneously, so voltage feedback loop 600 and current feedback loop 700 obtain Voltage Feedback controlled quentity controlled variable and Current Feedback Control amount respectively;
Described switching power source control circuit 500 is by the larger controlled quentity controlled variable in the Current Feedback Control amount that receives and Voltage Feedback controlled quentity controlled variable, and the operating state of control itself, driving switch conversion/rectification circuit 400 passes through output sample circuit 300 powering load.Switching power source control circuit 500 is by the larger controlled quentity controlled variable in the Current Feedback Control amount that receives and Voltage Feedback controlled quentity controlled variable, in the operating state of control itself, there are a kind of regular situation and two kinds of special situations in the comparison of Current Feedback Control amount and Voltage Feedback controlled quentity controlled variable.Wherein two kinds of special situations are: when processor 800 exports given voltage, current feedback loop 700 no current feedback control amount exports, or Current Feedback Control amount is minimum value, and so Voltage Feedback controlled quentity controlled variable is obviously greater than Current Feedback Control amount; In like manner, when processor 800 exports specified current flow, voltage feedback loop 600 no-voltage feedback control amount exports, or Voltage Feedback controlled quentity controlled variable is minimum value, and so Current Feedback Control amount is obviously greater than Voltage Feedback controlled quentity controlled variable.Regular situation is: processor 800 sends given voltage and specified current flow simultaneously, and so voltage feedback loop 600 and current feedback loop 700 output voltage feedback control amount and Current Feedback Control amount respectively, then carries out normal contrast.In the present embodiment, above-mentioned processor 800 connects external data interface 801, and this external data interface receives the control command comprising the interfaces such as remote controller, RS485 bus, RS232 bus, I2C bus, spi bus RS485 bus or power line carrier, PLC.The concrete numerical value of output current and output voltage can also be carried out upload process by external data interface 801, makes user understand output voltage and the output voltage of Switching Power Supply in real time.
In another embodiment, above-mentioned Switching Power Supply also comprises display unit 900, this display unit 900 connection handling device 800, and processor 800 connects described output sample circuit 300; Described processor 800 receives and exports output current and/or output voltage that sample circuit 300 gathers and carry out analog-to-digital conversion process, and described display unit 900 shows the voltage value after analog-to-digital conversion process and/or current values.In the present embodiment, the output current that above-mentioned output sample circuit 300 collects and output voltage are electric current and the voltage that Switching Power Supply controls power supply output, if need to implement to understand output voltage and output current, so can receive output current and output voltage by processor 800, then, the output current of analog signal and output voltage are carried out analog-to-digital conversion, namely quantize process, finally the concrete numerical value of output voltage and output current is shown by display unit 900, make user understand output voltage and the output current of Switching Power Supply in real time.
In the present embodiment, in actual applications, usually only have one to reach lock-out state in voltage feedback loop 600 and current feedback loop 700, when voltage feedback loop 600 locks, Switching Power Supply is operated in constant voltage output state, and when current feedback loop 700 locks, power work is in constant current output state.This two states can change according to the situation of load, if output current raises and reaches output current set point under pressure constant state, transfers constant current output state to; Under constant current state, if output voltage raises and reaches voltage setting value, transfer constant voltage operating state to.
With reference to Fig. 2, above-mentioned voltage feedback loop 600 comprises operational amplifier U4B, resistance R11, resistance R12, resistance R13, resistance R14, electric capacity C11 and electric capacity C12; The in-phase input end of described operational amplifier U4B is by resistance R12 ground connection; Connect described output sample circuit 300 by described resistance R11 and receive described output voltage; The pin that the inverting input of described operational amplifier U4B connects described processor 800 by described resistance R13 receives described given voltage, the inverting input of described operational amplifier U4B also connects one end of described electric capacity C11, the other end ground connection of electric capacity C11; The input of the diode D6 that the Current Feedback Control amount produced for the Voltage Feedback controlled quentity controlled variable that voltage feedback loop 600 produced and current feedback loop in the output connection layout 4 of described calculation amplifier U4B is added, the output of diode D6 connects described switching power source control circuit 500, the output of described operational amplifier U4B also passes through the resistance R14 of series connection and the inverting input of electric capacity C12 concatenation operation amplifier U4B, the feedback amplifying return circuit of composition integration.The voltage feedback loop 600 of the present embodiment, structure is simple, and each electronic device easily obtains, cheap, has saved the cost of Switching Power Supply.
With reference to Fig. 3, in the present embodiment, above-mentioned current feedback loop 700 comprises operational amplifier U4A, resistance R6, resistance R7, resistance R8, resistance R9, resistance R10, electric capacity C9 and electric capacity C10; The in-phase input end of described operational amplifier U4A is by the electric capacity C9 of described parallel connection and resistance R6 ground connection, and the pin also connecting described processor 800 by resistance R7 receives described specified current flow; The inverting input of described operational amplifier U4A connects a fixed reference potential by resistance R8, and the inverting input of operational amplifier U4A also connects described output sample circuit 300 by resistance R9 and receives described output current; The diode D5 that the Current Feedback Control amount produced for the Voltage Feedback controlled quentity controlled variable that voltage feedback loop 600 produced and current feedback loop in the output connection layout 4 of described operational amplifier U4A is added, the output of diode D5 connects described switching power source control circuit 500, the output of described operational amplifier U4A also passes through the resistance R10 of series connection and the inverting input of electric capacity C10 concatenation operation amplifier U4A, the feedback amplifying return circuit of composition integration.The current feedback loop 700 of the present embodiment, structure is simple, and each electronic device easily obtains, cheap, has saved the cost of Switching Power Supply.
With reference to Fig. 4, in one embodiment, in figure, U5 is the processor 800 with analog signal, the mutual translation function of digital signal or equivalent function, wherein equivalent function can be, the modulating output of processor 800 adopts the method changing duty cycle square wave (PWM), and in addition simple RC low-pass filtering realization etc.; Operational amplifier U4B and peripheral capacitance-resistance constitute voltage feedback loop 600; Operational amplifier U4A and peripheral resistance-capacitance circuit constitute current feedback loop 700; U1 is switching power source control circuit 500; Input rectifying bridge D1, electric capacity C3, C4, transformer T1, export switch change-over/current rectifying and wave filtering circuit 400 that rectifier diode D2, output filter capacitor C2 etc. constitute typical Switching Power Supply.In circuit, processor 800U5 carries out data communication by external data interface 801J3 and outside, for the controling parameters of received current voltage, and the output current of the current actual working state electric current that processor 800U5 is sampled and output voltage are crossed data port and are reported, host computer can be reported carry out showing, recording storage etc., also directly can be shown by the display unit 900 be connected with processor 800U5.Processor 800U5 also exports the current feedback loop 700 that given voltage is given centered by operational amplifier U4A, and exports the voltage feedback loop 600 of giving centered by operational amplifier U4B of given voltage.Electric power outputting current is formed and exports sample rate current after R3 sampling, and export sample rate current equal with output current, it is input current feedback control loop 700 together with specified current flow, and exports through diode D5.Electric power output voltage is formed and exports sampled voltage after R11, R12 dividing potential drop, export sampled voltage equal with output voltage, it inputs U4B voltage feedback loop 600 together with given voltage, export and be added with the output signal from current feedback loop 700 after D6, acting in conjunction is on optocoupler U3, and control switch power control circuit 500U1, thus change the output current of whole Switching Power Supply or output voltage and make it meet specified current flow or set point corresponding to given voltage.
The Switching Power Supply of the present embodiment, obtain according to exporting the controling parameters requiring setting by processor 800, then the given voltage of corresponding controling parameters and specified current flow is exported to voltage feedback loop 600 and current feedback loop 700, thus the operating state of adjustment Switching Power Supply.Enormously simplify the hardware designs of Switching Power Supply, make the different power supply hardware designs normalization exporting requirement within the specific limits, identical hardware circuit only needs to load different controling parameters can realize different voltage, electric current, the output of power, greatly reduce the batch production cost of the Switching Power Supply that specification is similar to, simplify the configuration of product, the Contrast tuned imaging to power supply can also be realized, to greatly throw light on by simplified intelligent, the product design of Smart Home class, effective acceleration intelligent lighting, the product development of Smart Home class also reduces intelligent lighting, the cost of the product of Smart Home class.
With reference to Fig. 5, the utility model embodiment provides the control method of above-mentioned Switching Power Supply, comprises step:
S1, processor 800 obtain the controling parameters according to exporting the control switch power supply requiring setting by external data interface 801, or in processor, load default controling parameters, and described controling parameters comprises specified current flow and/or given voltage; And, gather output current corresponding to Switching Power Supply and/or output voltage by exporting sample circuit 300;
S2, receive described specified current flow and output current by current feedback loop 700, obtain Current Feedback Control amount; And/or, receive described given voltage and output voltage by voltage feedback loop 600, obtain Voltage Feedback controlled quentity controlled variable; And the larger controlled quentity controlled variable in described Current Feedback Control amount and Voltage Feedback controlled quentity controlled variable is flowed to switching power source control circuit 500;
S3, described switching power source control circuit 500 are according to the operating state of the larger controlled quentity controlled variable control in described Current Feedback Control amount and Voltage Feedback controlled quentity controlled variable itself, and driving switch conversion/current rectifying and wave filtering circuit 400 is by exporting sample circuit 300 powering load.
As as described in above-mentioned steps S1, above-mentioned processor 800 can accept outside controling parameters, thus control specified current flow and given voltage export to corresponding current feedback loop 700 and voltage feedback loop 600, therefore, corresponding different loads controls, different corresponding controling parameters can be inputted, namely by the change of software parameter, the output of control switch power supply, enormously simplify the hardware designs of Switching Power Supply, make the different Switching Power Supply hardware designs normalization exporting requirement within the specific limits, identical hardware circuit only needs to load different controling parameters can realize different voltage, electric current, the output of power, greatly reduce the cost of Switching Power Supply batch production, simplify the configuration of product, the Contrast tuned imaging to power supply can also be realized, to greatly throw light on by simplified intelligent, the product design of Smart Home class, effective acceleration intelligent lighting, the product development of Smart Home class also reduces intelligent lighting, the cost of the product of Smart Home class.The mode that processor 800 obtains controling parameters is a lot, such as processor 800 connects external data interface 801, by this external data interface 801 input control parameter to processor 800, external data interface 801 comprises the interfaces such as remote controller, RS485 bus, RS232 bus, I2C bus, spi bus or power line carrier, PLC.It should be noted that processor 800 needs to have the function that digital signal is converted to analog signal or equivalence, so that controling parameters is converted to analog signal.The collection of above-mentioned output sample circuit 300 pairs of output currents and output voltage, then for current feedback loop 700 and voltage feedback loop 600 provide sampling parameter, be convenient to contrast, obtain Current Feedback Control amount, Voltage Feedback controlled quentity controlled variable, wherein the practical manifestation form of Current Feedback Control amount and Voltage Feedback controlled quentity controlled variable is voltage.In the present embodiment, the above-mentioned controling parameters that loading is preset in processor 800, such as, Switching Power Supply is before dispatching from the factory, and the pre-loaded good controling parameters of meeting, can directly require to use in product in the output of correspondence.The controling parameters preset can comprise multiple, can set according to concrete instructions for use, and such as, corresponding first load, presets the first controling parameters, corresponding second load, presets the second controling parameters etc.In the Switching Power Supply of same hardware configuration, load different controling parameters, make it have the different Switching Power Supply hardware designs normalization exporting requirement within the specific limits, and then improve the production efficiency of Switching Power Supply.
As described in above-mentioned steps S2, above-mentioned voltage feedback loop 600 is a closed loop amplifier, the operation principle of voltage feedback loop 600 compares the value of given voltage and output voltage, and output voltage feedback control amount is to switching power source control circuit 500, switch power source output voltage is changed, thus makes the value of output voltage and the value of given voltage reach the corresponding relation of expection.The given voltage that such as voltage feedback loop 600 designs and output voltage are the relation of 1:10, then when given voltage is 1V, output voltage should be 10V, voltage feedback loop 600 just enters lock-out state, if output voltage does not meet the condition of 10V, the Voltage Feedback controlled quentity controlled variable that this loop exports makes it adjust the output of supply voltage switch by acting on switching power source control circuit 500, and then makes output voltage stabilization at 10V.By voltage feedback loop 600, the corresponding relation that output voltage changes according to the given voltage of processor 800 can be realized, thus the output voltage realizing power supply is controlled by processor 800.In like manner, by current feedback loop 700, the corresponding relation that output current changes according to the specified current flow of processor 800 can be realized, thus the output current realizing power supply is controlled by processor 800.
As described in above-mentioned steps S3, namely switching power source control circuit 500 is according to the larger controlled quentity controlled variable in Voltage Feedback controlled quentity controlled variable Voltage Feedback controlled quentity controlled variable and Current Feedback Control amount, the operating state etc. of control switch power control circuit 500, thus driving switch conversion/current rectifying and wave filtering circuit 400 is by exporting sample circuit 300 powering load.The operating state of switching power source control circuit 500 can control accordingly according to different circuit, as used pwm circuit to control, then needs the duty ratio etc. adjusting pwm circuit output.
With reference to Fig. 6, in the present embodiment, above-mentioned steps S3 specifically comprises:
S31, described switching power source control circuit 500 control its operating state according to the larger controlled quentity controlled variable in described Current Feedback Control amount and Voltage Feedback controlled quentity controlled variable, and driving switch conversion/rectification circuit exports output current and output voltage by exporting sample circuit 300;
S32, when output current and described specified current flow reach described current feedback loop 700 preset corresponding relation time, described Switching Power Supply is in constant current state; Or when output voltage and described given voltage reach the corresponding relation preset of described voltage feedback loop 600, described Switching Power Supply is in pressure constant state.
As described in above-mentioned steps S31 and S32, because load service condition is different, so the output current of Switching Power Supply output and output voltage may change, so the output current of usual Switching Power Supply and output voltage can not meet designated value simultaneously, thus current feedback loop 700 or voltage feedback loop 600 generally only having one there is lock-out state, which is in the lock state, be then in any steady state.Such as current feedback loop 700 is in the lock state, then Switching Power Supply is in constant-current source state; Or voltage feedback loop 600 is in the lock state, then Switching Power Supply is in constant pressure source state.
In the present embodiment, in above-mentioned steps S32 when output current and described specified current flow reach described current feedback loop 700 preset corresponding relation time, described Switching Power Supply comprises step after being in the step of constant current state:
S321, when described output voltage is increased to the corresponding relation preset reaching described voltage feedback loop 600 with described given voltage, Switching Power Supply is converted to constant pressure source state.
As described in above-mentioned steps S321, when Switching Power Supply is in constant current state, account for voltage feedback control loop 600 is in out-of-lock condition, and current feedback loop 700 is in the lock state, because load can make output voltage change according to service condition, when output voltage is elevated to default value, when namely output voltage makes voltage feedback loop 600 be in the lock state, Switching Power Supply is automatically converted to constant pressure source state, improve the utility model Switching Power Supply adaptability and can be restrictive.
In the present embodiment, in above-mentioned steps S32 when output voltage and described given voltage reach described voltage feedback loop 600 preset corresponding relation time, described Switching Power Supply comprises step after being in the step of pressure constant state:
S322, when described output current is increased to the corresponding relation preset reaching described current feedback loop 700 with described specified current flow, Switching Power Supply is converted to constant-current source state.
As described in above-mentioned steps S322, when Switching Power Supply is in pressure constant state, illustrate that current feedback loop 700 is in out-of-lock condition, and voltage feedback loop 600 is in the lock state, because load can make output current change according to service condition, when output current is elevated to default value, when namely output current makes current feedback loop 700 be in the lock state, Switching Power Supply is automatically converted to constant-current source state, improve the utility model Switching Power Supply adaptability and can be restrictive.
With reference to Fig. 7, in the present embodiment, in above-mentioned steps S1 by exporting after sample circuit 300 gathers the output current of Switching Power Supply and the step of output voltage, comprising:
S1`, receive described output current and output voltage by processor 800, and by output current and output voltage numeralization, then shown the numerical value of described output current and output voltage numeralization by display unit 900.
As as described in above-mentioned steps S1`, the output current that above-mentioned output sample circuit 300 collects and output voltage are electric current and the voltage that Switching Power Supply controls power supply output, if need to understand output voltage and output current in real time, so can receive output current and output voltage by processor 800, then, the output current of analog signal and output voltage are carried out analog-to-digital conversion, namely quantize process, finally the concrete numerical value of output voltage and output current is shown by display unit 900, the charge condition making user understand power supply in real time to be exported by Switching Power Supply.
In another embodiment, also by external data interface 801, the concrete numerical value of output current and output voltage can be carried out upload process, make user understand output current and the output voltage of Switching Power Supply in real time.
The control method of the Switching Power Supply of the present embodiment, obtain according to exporting the controling parameters requiring setting by processor 800, or in processor 800, load the controling parameters preset, then the given voltage of corresponding controling parameters and specified current flow is exported to voltage feedback loop 600 and current feedback loop 700, thus the operating state of adjustment Switching Power Supply.Enormously simplify the hardware designs of Switching Power Supply, make the different power supply hardware designs normalization exporting requirement within the specific limits, identical hardware circuit only needs to load different controling parameters can realize different voltage, electric current, the output of power, greatly reduce the batch production cost of the Switching Power Supply that specification is similar to, simplify the configuration of product, the Contrast tuned imaging to power supply can also be realized, to greatly throw light on by simplified intelligent, the product design of Smart Home class, effective acceleration intelligent lighting, the product development of Smart Home class also reduces intelligent lighting, the cost of the product of Smart Home class.
The foregoing is only preferred embodiment of the present utility model; not thereby the scope of the claims of the present utility model is limited; every utilize the utility model specification and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (5)
1. a Switching Power Supply, is characterized in that, comprises and exports sample circuit, switch change-over/current rectifying and wave filtering circuit, switching power source control circuit, voltage feedback loop, current feedback loop, processor and external data interface;
Described processor receives controling parameters input by external data interface, and exports the given voltage corresponding with controling parameters to voltage feedback loop, and/or exports the specified current flow corresponding with controling parameters to current feedback loop;
After the given voltage of the output voltage that described voltage feedback loop reception output sample circuit collects and processor output, export corresponding Voltage Feedback controlled quentity controlled variable to described switching power source control circuit; And/or after the specified current flow of the output current that described current feedback loop reception output sample circuit collects and processor output, output current feedback control amount gives described switching power source control circuit;
Described switching power source control circuit is by the larger controlled quentity controlled variable in the Current Feedback Control amount that receives and Voltage Feedback controlled quentity controlled variable, and the operating state of control itself, driving switch conversion/rectification circuit passes through output sample circuit powering load.
2. Switching Power Supply according to claim 1, is characterized in that, described external data interface receives the control command comprising remote controller, RS485 bus, RS232 bus, I2C bus, spi bus or power line carrier, PLC.
3. Switching Power Supply according to claim 1 and 2, is characterized in that, described voltage feedback loop comprises operational amplifier U4B, resistance R11, resistance R12, resistance R13, resistance R14, electric capacity C11 and electric capacity C12;
The in-phase input end of described operational amplifier U4B is by resistance R12 ground connection; Connect described output sample circuit by described resistance R11 and receive described sampled voltage;
The pin that the inverting input of described operational amplifier U4B connects described processor by described resistance R13 receives described given voltage, and the inverting input of described operational amplifier U4B also connects one end of described electric capacity C11, the other end ground connection of electric capacity C11;
The output of described calculation amplifier U4B connects the input of a diode D6, the output of diode D6 connects described switching power source control circuit, and the output of described operational amplifier U4B is also by the resistance R14 of series connection and the inverting input of electric capacity C12 concatenation operation amplifier U4B.
4. Switching Power Supply according to claim 1 and 2, is characterized in that, described current feedback loop comprises operational amplifier U4A, resistance R6, resistance R7, resistance R8, resistance R9, resistance R10, electric capacity C9 and electric capacity C10;
The in-phase input end of described operational amplifier U4A is by described electric capacity C9 in parallel and resistance R6 ground connection, and the pin also connecting described processor by resistance R7 receives described specified current flow;
The inverting input of described operational amplifier U4A connects a fixed reference potential by resistance R8, and the inverting input of operational amplifier U4A also connects described output sample circuit by resistance R9 and receives described sample rate current;
The output of described operational amplifier U4A connects a diode D5, the output of diode D5 connects described switching power source control circuit, and the output of described operational amplifier U4A is also by the resistance R10 of series connection and the inverting input of electric capacity C10 concatenation operation amplifier U4A.
5. Switching Power Supply according to claim 1, it is characterized in that, also comprise display unit, described processor receives the sample rate current and/or sampled voltage that export sample circuit collection and carries out analog-to-digital conversion process, the voltage value after described display unit display analog-to-digital conversion process and/or current values.
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| CN201520517283.7U CN205051583U (en) | 2015-07-15 | 2015-07-15 | Switching power supply |
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| CN201520517283.7U CN205051583U (en) | 2015-07-15 | 2015-07-15 | Switching power supply |
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| CN (1) | CN205051583U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106686809A (en) * | 2016-11-28 | 2017-05-17 | 深圳市镭润科技有限公司 | Adaptive LED dimming circuit and method |
| CN109696938A (en) * | 2017-10-21 | 2019-04-30 | 国神光电科技（上海）有限公司 | A kind of electronic device and control method for current source control |
| CN110518802A (en) * | 2019-07-24 | 2019-11-29 | 内江市凌辉电子科技有限公司 | A kind of power supply of control output power protection input |
-
2015
- 2015-07-15 CN CN201520517283.7U patent/CN205051583U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106686809A (en) * | 2016-11-28 | 2017-05-17 | 深圳市镭润科技有限公司 | Adaptive LED dimming circuit and method |
| CN106686809B (en) * | 2016-11-28 | 2018-11-16 | 深圳市镭润科技有限公司 | A kind of adaptive LED light adjusting circuit and method |
| CN109696938A (en) * | 2017-10-21 | 2019-04-30 | 国神光电科技（上海）有限公司 | A kind of electronic device and control method for current source control |
| CN109696938B (en) * | 2017-10-21 | 2023-11-03 | 国神光电科技（上海）有限公司 | Electronic device for current source control and control method |
| CN110518802A (en) * | 2019-07-24 | 2019-11-29 | 内江市凌辉电子科技有限公司 | A kind of power supply of control output power protection input |
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