CN103219893B - Switch power controller and switching power circuit - Google Patents
Switch power controller and switching power circuit Download PDFInfo
- Publication number
- CN103219893B CN103219893B CN201310148072.6A CN201310148072A CN103219893B CN 103219893 B CN103219893 B CN 103219893B CN 201310148072 A CN201310148072 A CN 201310148072A CN 103219893 B CN103219893 B CN 103219893B
- Authority
- CN
- China
- Prior art keywords
- output
- power supply
- voltage
- input
- switch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The present invention is applicable to field of switch power, provide a kind of switch power controller, with power supply, the transformer with former limit and secondary and isolation drive model calling, described isolation drive module receives drive singal output feedback signal, described switch power controller comprises: feedback unit, the electric current and voltage that the output limit of described Switching Power Supply of sampling exports, at output output drive signal to described isolation drive module; Oscillation control unit, the feedback end of described oscillation control unit is connected with the output of described isolation drive module, control according to described feedback signal the tank circuit of described transformer disconnection or with predeterminated frequency energy storage and demagnetization.By oscillation control unit according to the disconnection of the tank circuit on the former limit of this feedback signal control transformer and connection, to realize output constant current and the constant voltage of Switching Power Supply, so, the constant pressure and flow using the high on-off controller of integrated level namely can realize Switching Power Supply exports, and reduces the volume of Switching Power Supply.
Description
Technical field
The invention belongs to field of switch power, particularly relate to a kind of switch power controller and switching power circuit.
Background technology
Along with the development of switch power technology, be more and more tending towards miniaturized Switching Power Supply and be applied to charger, adapter, LED(light-emittingdiode more and more widely, light-emitting diode) in the electronic equipment such as driving power.
The Switching Power Supply of current middle low power mainly contains two kinds of topological structures: former limit feedback and secondary side feedback.Wherein, the dynamic response of secondary side feedback is fast, but needs photoelectrical coupler, three end adjustable shunt reference source (as: TL431) and more discrete components, and circuit structure is more complicated; Former limit feedback does not then need photoelectrical coupler, three end adjustable shunt reference sources, and circuit structure is relatively simple, but dynamic response is slow.
Summary of the invention
The object of the embodiment of the present invention is to provide a kind of switch power controller, is intended to solve the contradictory problems between traditional Switching Power Supply dynamic response and circuit level.
The embodiment of the present invention realizes like this, a kind of switch power controller, for there is input limit and exporting in the Switching Power Supply on limit, with power supply, the transformer with former limit and secondary and isolation drive model calling, described isolation drive module receives drive singal output feedback signal, and described switch power controller comprises:
Feedback unit, its power end, earth terminal, voltage detecting end and current detecting end are all connected with the output limit of Switching Power Supply, the electric current and voltage that the output limit of described feedback unit sampling switch power supply exports at its output output drive signal to described isolation drive module;
Oscillation control unit, its input and output are connected with the positive pole of described power supply and the different name end on described former limit respectively, or its input is connected with the described Same Name of Ends on former limit and the negative pole of power supply respectively with output, the feedback end of described oscillation control unit is connected with the output of described isolation drive module, described oscillation control unit control according to described feedback signal the tank circuit of described transformer disconnection or with predeterminated frequency energy storage and demagnetization, export constant voltage and constant current to make described secondary.
Above-mentioned switch power controller is detected by feedback unit and the electric current and voltage output drive signal driving isolation driver module output feedback signal exported according to transformer, oscillation control unit is according to the disconnection of the tank circuit on the former limit of this feedback signal control transformer or with predeterminated frequency energy storage and demagnetization, constant current and constant voltage is exported to realize Switching Power Supply, so, the constant pressure and flow using the high on-off controller of integrated level namely can realize Switching Power Supply exports, and reduces the volume of Switching Power Supply.
Another object of the embodiment of the present invention is to provide a kind of Switching Power Supply, comprises transformer, isolation drive module and the above-mentioned switch power controller with former limit and secondary, and described isolation drive module receives drive singal output feedback signal.
Above-mentioned switch power controller is detected by feedback unit and the electric current and voltage output drive signal driving isolation driver module output feedback signal exported according to transformer, oscillation control unit is according to the disconnection of the tank circuit on the former limit of this feedback signal control transformer or with predeterminated frequency energy storage and demagnetization, constant current and constant voltage is exported to realize Switching Power Supply, relative traditional approach decreases discrete component, circuit structure is made to become simple, dynamic response is fast, the constant pressure and flow simultaneously using the high on-off controller of integrated level namely can realize Switching Power Supply exports, reduce the volume of Switching Power Supply.
Accompanying drawing explanation
Fig. 1 is the module map of the switch power controller that one embodiment of the invention provides;
Fig. 2 is the module map of the switch power controller that another embodiment of the present invention provides;
Fig. 3 is the function structure chart of the switch power controller that one embodiment of the invention provides;
Fig. 4 is the schematic diagram of the switch power controller that one embodiment of the invention provides;
Fig. 5 is the schematic diagram of the Switching Power Supply that one embodiment of the invention provides.
Embodiment
In order to make the technical problem to be solved in the present invention, technical scheme and beneficial effect clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
As illustrated in fig. 1 and 2, show the switch power controller module map that a preferred embodiment provides, for convenience of description, illustrate only part related to the present embodiment.
One switch power controller 100, for having input limit and exporting in the Switching Power Supply on limit, input limit and the output limit of Switching Power Supply generally demarcate using transformer primary side and secondary as border.
Switch power controller 100 is connected with power supply 200, transformer T1 and isolation drive module 300, transformer T1 has former limit and secondary, isolation drive module 300 receives drive singal output feedback signal, and switch power controller 100 comprises feedback unit 100A and oscillation control unit 100B.
The power end 8 of feedback unit 100A, earth terminal 5, voltage detecting end 7 and current detecting end 6 are all connected with the output limit of Switching Power Supply, specifically all be electrically connected with the secondary of transformer T1, the electric current and voltage (voltage of the secondary output of transformer T1 is the voltage of Switching Power Supply output after rectifying and wave-filtering) of the output limit output of feedback unit 100A sampling switch power supply, and at its output 4 output drive signal to isolation drive module 300, the earth terminal 5 of feedback unit 100A connects output signal ground.
The input 1 of oscillation control unit 100B is connected (with reference to figure 1) with the Same Name of Ends on the former limit of transformer T1 and the negative pole of power supply 200 respectively with output 2, or the input 1 of oscillation control unit 100B is connected (with reference to figure 2) with the different name end on the former limit of the positive pole transformer T1 of power supply 200 respectively with output 2.
The feedback end 3 of oscillation control unit 100B is connected with the output of isolation drive module 300, according to the disconnection of the tank circuit of feedback signal control transformer T1 or with predeterminated frequency energy storage and demagnetization, specifically utilize the power switch 106 being located at oscillation control unit 100B to realize this function (with reference to figure 3,4), export constant voltage and constant current to make Switching Power Supply.
With reference to figure 3,4,5, in the present embodiment, the power end 8 of feedback unit 100A, voltage detecting end 7, current detecting end 6, output 4, earth terminal 5 successively as switch power controller 100 power input pin VO, voltage sense pin VR, current detecting pin IR, drive pin VC, output signal ground GND2; The input 1 of oscillation control unit 100B, output 2, feedback end 3 are successively as control pin D, input ground GND1, the feedback pin FB of switch power controller 100.
Above-mentioned switch power controller 100 is detected by feedback unit 100A and electric current and voltage output drive signal driving isolation driver module 300 output feedback signal exported according to transformer T1, oscillation control unit 100B is according to the disconnection of the tank circuit on the former limit of this feedback signal control transformer T1 or with predeterminated frequency energy storage and demagnetization, constant current and constant voltage is exported to realize Switching Power Supply, so, the constant pressure and flow using the high on-off controller 100 of integrated level namely can realize Switching Power Supply exports, and reduces the volume of Switching Power Supply.
Wherein in an embodiment, switch power controller 100 adopts the DIP8(DoubleIn-linePackage on double-basis island, DIP) encapsulation, 100A feedback unit is located at the first Ji Dao, oscillation control unit 102B is located at the second Ji Dao, thus can ensure input and output electrical isolation.
As shown in Figure 3, show switch power controller 100 function structure chart more specifically that a preferred embodiment provides, for convenience of description, illustrate only part related to the present embodiment.
In a preferred embodiment, feedback unit 100A comprises output voltage judge module 101, output current judge module 102 and Digital Logic processing module 103, and output voltage judge module 101 has voltage detecting end 7, output current comparison module 102 has current detecting end 6.
Output voltage judge module 101 comprises the first a reference source, the voltage detecting end 7 of output voltage judge module 101 is connected with the output limit of Switching Power Supply as the voltage detecting end 7 of feedback unit 100A, output voltage comparative result VRC after the voltage that sampling switch power supply exports compares with the first a reference source; Output current judge module 102 comprises the second a reference source, the current detecting end 7 of output current judge module 102 is connected with the output limit of Switching Power Supply as the current detecting end 7 of feedback unit 100A, specifically be electrically connected with the secondary of transformer T1, output current comparative result IRC after the electric current that sampling switch power supply exports compares with the second a reference source; Digital Logic processing module 103 receives and according to voltage compare result and electric current comparative result at its output output drive signal, the output of Digital Logic processing module 103 as the output 4 of feedback unit 100A, namely as the driving pin VC of switch power controller 100.
The power end of output voltage judge module 101, output current judge module 102 and Digital Logic processing module 103 and earth terminal are respectively as the power end 8 of feedback unit 100A and earth terminal 5.
In a preferred embodiment, oscillation control unit 100B comprises power supply generation module 104, voltage controlled oscillator 105 and power switch 106.
The input of power supply generation module 104 is connected with the input of power switch 106, the input of power switch 106, output are successively as input 1, the output 2 of oscillation control unit 100B, the feedback end of voltage controlled oscillator 105 is connected with the output of isolation drive module 300 as the feedback end 3 of oscillation control unit 100B, the power end of voltage controlled oscillator 105 is connected with the output of voltage generating module 104, the control end that the output of voltage controlled oscillator 105 outputs control signals to power switch 106 is to control power switch remain off or with predeterminated frequency conducting and cut-off, the earth terminal of voltage controlled oscillator 105, the earth terminal of power supply generation module 104 and the output of power switch 106 are all connected with the negative pole of power supply 200 as the input ground GND1 of switch power controller 100.
As shown in Figure 4, show the schematic diagram of the switch power controller 100 that a preferred embodiment provides, for convenience of description, illustrate only part related to the present embodiment.
In a preferred embodiment, output voltage judge module 101 comprises the first a reference source and the first comparator U1, the positive input terminal of the first comparator U1 is connected with the output limit of Switching Power Supply as the voltage detecting end 7 of feedback unit 100A, specifically be connected with the divider resistance output of output voltage, the negative input end of the first comparator U1 is connected with described first a reference source, the output of the first comparator U1 is connected with the first input end of Digital Logic processing module 103.
In a preferred embodiment, output current judge module 102 comprises the second a reference source, second comparator U2, first divider resistance R1 and the second divider resistance R2, the positive input terminal of the second comparator 102 is connected with the first output of the second a reference source, one end of first divider resistance R1 is connected with the negative input end of the second comparator U2 and is connected with the second output of the second a reference source through described second divider resistance R2, the other end of the first divider resistance R1 is connected with the output limit of Switching Power Supply as the current detecting end 6 of feedback unit 100A, specifically be connected with the different name end of transformer T1 secondary, the output of the second comparator U2 is connected with the second input of Digital Logic processing module 103.
In a preferred embodiment, described digital signal processing module 103 is or door U3, or the first input end of door U3, the second input are connected with the output of the first comparator U1, the output of the second comparator U2 respectively, or the output of door U3 exports described drive singal.
In a preferred embodiment, power supply generation module 104 comprises diode D1 and storage capacitor C1, the input of anode as power supply generation module 104 of diode D1 is connected with the positive pole of power supply 200 with the former limit through transformer T1, the negative electrode of diode D1 is connected with the power end of voltage controlled oscillator 105 as the output of power supply generation module 104, the negative electrode of diode D1 and being connected with the negative pole of power supply 200 through storage capacitor C1.
In a preferred embodiment, power switch 106 is N-type metal-oxide-semiconductor Q1, the drain electrode of N-type metal-oxide-semiconductor Q1, source electrode, grid are successively as input, output, the control end of power switch 106, i.e. the drain electrode of N-type metal-oxide-semiconductor Q1, source electrode control pin D as the input 1(of oscillation control unit 100B successively), output 2(inputs ground GND1).
The drain electrode of N-type metal-oxide-semiconductor Q1 is connected with the positive pole of power supply 200 through the former limit (being namely connected with the Same Name of Ends on former limit) of transformer T1, the source electrode of N-type metal-oxide-semiconductor Q1 is connected with the negative pole of power supply 200; Or the drain electrode of N-type metal-oxide-semiconductor Q1 is connected with the positive pole of power supply 200, the source electrode of N-type metal-oxide-semiconductor Q1 is connected with the negative pole of power supply 200 with the former limit (being namely connected with the different name end on former limit) of transformer T1.
In addition, as shown in Figure 5, additionally provide a kind of Switching Power Supply, Switching Power Supply comprises transformer T1, isolation drive module 300 and the above-mentioned switch power controller 100 with former limit and secondary, and isolation drive module 300 receives drive singal output feedback signal.The structure of switch power controller 100 and the principle of work and power thereof as mentioned above, repeat no more here.
In the present embodiment, isolation drive module 200 is photoelectrical coupler, the driving pin VC of the first input end of photoelectrical coupler G1 and the output 4(switch power controller 100 of feedback unit 100A) be connected, second input termination output signal ground (i.e. the earth terminal 5 of above-mentioned feedback unit or the output signal ground GND2 of controller), the feedback pin FB of first output of photoelectrical coupler G1 and the feedback end 3(switch power controller 100 of oscillation control unit 100B) be connected, the input ground GND1 of the second output and the output 2(switch power controller 100 of oscillation control unit 100B) be connected.Photoelectrical coupler G1 realizes the mirror image of electric current, and its Main Function realizes the output signal ground GND2 of switch power controller 100 and the isolation of input ground GND1, ensures that the isolation safe of Switching Power Supply exports.
Wherein in an embodiment, if when power supply is D.C. regulated power supply, Switching Power Supply also comprises diode D2, sampling resistor R3, divider resistance R4, divider resistance R5 and filter capacitor C3.
The power end 8 of feedback unit 100A is connected with the negative electrode of described diode D2, the anode of described diode D2 is connected with the Same Name of Ends of the secondary of transformer T1; The current detecting end 6 of feedback unit 100A is connected with the different name end of the secondary of transformer T1 and connects through sampling resistor R3 with outputing signal; The voltage detecting end 7 of feedback unit 100A outputs signal ground with being connected through divider resistance R4 with the negative electrode of diode D2 and connecing through divider resistance R5; The negative electrode of filter capacitor C3 one end and described diode D2 and load 100 is connected, another termination of filter capacitor C3 outputs signal ground, the earth terminal 5 of feedback unit 100A connects outside output signal ground as the output signal ground GND2 end of switch power controller 100.
Wherein in an embodiment, Switching Power Supply also comprises rectifier BR1, filter capacitor C2.
Two inputs of rectifier BR1 are connected with two outputs of AC power AC respectively, the common cathode output of rectifier BR1 is connected with the input 1 of oscillation control unit 100B through the former limit of transformer T1, and the common anode output end of rectifier BR1 is connected with the output 2 of vibrational control module 100B; Filter capacitor C1 is connected to the common cathode output of rectifier BR1 and is total between anode output end.
The operation principle of switch power controller 100 is described, composition graphs 4,5 below for an embodiment.
Assuming that when the output control signal VG of voltage controlled oscillator 105 is high level, power switch 106 conducting, when control signal VG is low level, power switch 106 ends (also claiming to close).
At the beginning of Switching Power Supply powers on, power switch 106 ends, and after rectifier BR1 rectification, the voltage VD of the input 1 of oscillation control unit 100B charges to storage capacitor C1 through diode D1, produces supply voltage VDD.Because supply voltage VDD only provides the power supply of voltage controlled oscillator 105, therefore need very little drive current, the capacitance of storage capacitor C1 is only pF magnitude, and accessible site, in the inside of switch power controller 100, does not need outside discrete capacitor element.
At the beginning of power-supply system powers on, output voltage is 0V voltage, so output voltage judge module 101, the power end of output current judge module 102 and Digital Logic processing module 103 all with power end 8(power input pin VO) be 0 volt (also claiming low level), therefore the drive singal that Digital Logic processing module 103 exports is low level, pin VC is driven to connect photoelectrical coupler G1, the input no current of photoelectrical coupler G1 flows into, therefore feedback pin FB is without pull-down current, feedback pin FB end keeps original high level state, the normal higher-order of oscillation of voltage controlled oscillator 105 (as 65KHz vibration) exports, along with high frequency conducting and the closedown of power switch 106, transformer T1 transfers energy to the output of Switching Power Supply, output voltage Vout raises gradually.When output voltage Vout reaches certain voltage (as 3V), output voltage judge module 101, output current judge module 102 and Digital Logic processing module 103 start normal work.
Constant current operation: when before the constant-voltage Vcv that the output voltage Vout of Switching Power Supply reaches default, (constant-voltage of general electronic equipment is all greater than 5V, switch power controller 100 provided by the invention is applicable to the normal working voltage of constant-voltage Vcv higher than output voltage judge module 101, output current judge module 102 and Digital Logic processing module 103), namely the voltage obtained through divider resistance R4, divider resistance R5 dividing potential drop is less than the voltage Vr1 that the first reference circuit produces, and therefore the output signal VRC of the first comparator U1 is low level; The output of output voltage judge module 101 can not close voltage controlled oscillator 105, and the state of power switch 106 depends on the output signal IRC of output current comparison module 102.
When output current Iout reaches default continuous current Icc, the output signal IRC of the second comparator U2 is high level, the drive singal exported through Digital Logic processing module 103 is still high level, drive singal is input to photoelectrical coupler G1, because photoelectrical coupler G1 has electric current to flow through, the level of feedback pin FB drags down by photoelectrical coupler G1, closes voltage controlled oscillator 105, thus closes power switch pipe 106.Now system maintains constant current operation state by controlling the remain off of power switch pipe or the alternate conduction of high frequency and cut-off.
Constant current state is, assuming that the voltage of current detecting pin IR is Vir, when a current flows through, be negative value relative to output signal ground GND2, Vir, when electric current is larger, negative value is larger.
Conducting through power switch 105 controls with cut-off, during constant current state,
Vr3＝Vr4
It is known through voltage division formulas,
So, the voltage Vir that current detecting pin IR holds is,
Constant Electric Current flow valuve Icc is,
Constant voltage operating state: when output current Iout is less than default continuous current Icc, the output signal IRC of the second comparator U2 is low level, the output signal IRC of output current judge module 102 can not close voltage controlled oscillator 105, and the state of power switch 106 depends on the output signal VRC of output voltage judge module 101 module.
When the output voltage Vout of Switching Power Supply is greater than default constant-voltage Vcv, the output signal VRC of the first comparator U1 is high level, the drive singal exported through Digital Logic processing module 103 is still high level, drive singal is input to photoelectrical coupler G1, because photoelectrical coupler G1 has electric current to flow through, the level of feedback pin FB drags down by photoelectrical coupler G1, closes voltage controlled oscillator 105, thus closes power switch 106.When the output voltage Vout of Switching Power Supply is less than default constant-voltage Vcv, operation principle is the same.System maintains constant voltage operating state through controlling the remain off of power switch 106 or the alternate conduction of high frequency and cut-off.
During pressure constant state, assuming that the voltage of voltage sense pin VR to be VR, VR equal with the voltage Vr1 that the first a reference source exports, again from voltage division formulas,
Vout is now constant voltage value Vcv,
Switching Power Supply is operated in constant voltage or constant current mode, depends on be with load 400 completely, and according to the situation of load, feedack controls power switch 106 and makes system stability in constant voltage or constant current state.
The invention provides a kind of controller 100 of constant pressure and flow Switching Power Supply, owing to there is input ground GND1 and output signal ground GND2, so the DIP8 on double-basis island can be adopted to encapsulate, while input and output electrical isolation can be ensured, improve the integrated level of controller, reduce volume.
A kind of constant pressure and flow Switching Power Supply provided by the invention, without the need to starting resistance, without the need to auxiliary winding, without the need to elements such as three end adjustable shunt reference sources (as: TL431), circuit is simple, and discrete component is few, be easy to miniaturized use, PCB(Printedcircuitboard, printed circuit board (PCB)) connect up easily, integrated level is high, reduce the cost of system, dynamic response is fast, improves stability and the reliability of system, meets prior art development trend.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. a switch power controller, for there is input limit and exporting in the Switching Power Supply on limit, with power supply, the transformer with former limit and secondary and isolation drive model calling, described isolation drive module receives drive singal output feedback signal, it is characterized in that, described switch power controller comprises:
Feedback unit, its power end, earth terminal, voltage detecting end and current detecting end are all connected with the output limit of described Switching Power Supply, described feedback unit sample described Switching Power Supply output limit electric current and voltage and at its output output drive signal to described isolation drive module;
Oscillation control unit, its input and output are connected with the positive pole of described power supply and the different name end on described former limit respectively, or its input is connected with the described Same Name of Ends on former limit and the negative pole of power supply respectively with output, the feedback end of described oscillation control unit is connected with the output of described isolation drive module, described oscillation control unit control according to described feedback signal the tank circuit of described transformer disconnection or with predeterminated frequency energy storage and demagnetization, export constant voltage and constant current to make described Switching Power Supply;
Described switch power controller adopts the encapsulation of double-basis island, and described feedback unit is located at the first Ji Dao, and described oscillation control unit is located at the second Ji Dao;
Described oscillation control unit comprises voltage controlled oscillator, power supply generation module and power switch;
The input of described power switch, output are successively as input, the output of described oscillation control unit;
The input of described power supply generation module is connected with the input of described power switch;
The control end that the feedback end of described voltage controlled oscillator is connected with the output of described isolation drive module as the feedback end of described oscillation control unit, the power end of described voltage controlled oscillator is connected with the output of described power supply generation module, the output of described voltage controlled oscillator outputs control signals to described power switch is to control described power switch remain off or with predeterminated frequency conducting and cut-off, the earth terminal of described voltage controlled oscillator, the earth terminal of described power supply generation module and the output of described power switch are connected with the negative pole of power supply.
2. switch power controller as claimed in claim 1, it is characterized in that, described feedback unit comprises the output voltage judge module with described voltage detecting end, the output current judge module with described current detecting end and Digital Logic processing module;
Described output voltage judge module comprises the first a reference source, the voltage detecting end of described output voltage judge module is connected with the output limit of described Switching Power Supply as the described voltage detecting end of described feedback unit, and the voltage that described Switching Power Supply of sampling exports compares output voltage comparative result afterwards with described first a reference source;
Described output current judge module comprises the second a reference source, the current detecting end of described output current judge module is connected with the output limit of described Switching Power Supply as the described current detecting end of described feedback unit, and the electric current that described Switching Power Supply of sampling exports compares output current comparative result afterwards with described second a reference source;
Described Digital Logic processing module receives and exports described drive singal according to described voltage compare result and electric current comparative result at its output, and its output is as the described output of described feedback unit;
The power end of described output voltage judge module, output current judge module and Digital Logic processing module and earth terminal are respectively as the described power end of described feedback unit and described earth terminal.
3. switch power controller as claimed in claim 2, it is characterized in that, described output voltage judge module also comprises the first comparator, and the positive input terminal of described first comparator is connected with the output limit of described Switching Power Supply as described voltage detecting end, negative input end is connected with described first a reference source, output is connected with the first input end of described Digital Logic processing module.
4. switch power controller as claimed in claim 3, it is characterized in that, described output current judge module comprises the second comparator, first divider resistance and the second divider resistance, the positive input terminal of described second comparator is connected with the first output of described second a reference source, one end of first divider resistance is connected with the negative input end of described second comparator and is connected through second output of described second divider resistance with described second a reference source, the other end is connected with the output limit of described Switching Power Supply as described current detecting end, the output of described second comparator is connected with the second input of described Digital Logic processing module.
5. switch power controller as claimed in claim 4, it is characterized in that, described Digital Logic processing module is or door, first input end, second input of described or door are connected with the output of described first comparator, the output of described second comparator respectively, and output that is described or door exports described drive singal.
6. switch power controller as claimed in claim 1, it is characterized in that, described power supply generation module comprises diode D1 and storage capacitor C1, the anode of described diode D1 is connected with the input of described power switch as the input of described power supply generation module, negative electrode is connected with the power end of described voltage controlled oscillator as the output of described power supply generation module, the negative electrode of described diode D1 and being connected with the negative pole of described power supply through described storage capacitor C1;
Described power switch is N-type metal-oxide-semiconductor, the drain electrode of described N-type metal-oxide-semiconductor, source electrode, grid are successively as input, output, the control end of described power switch, and the drain electrode of N-type metal-oxide-semiconductor is connected with the positive pole of described power supply through described former limit, source electrode is connected with the negative pole of described power supply.
7. a Switching Power Supply, is characterized in that, comprises transformer, isolation drive module and the switch power controller as described in any one of claim 1 to 6 with former limit and secondary, and described isolation drive module receives drive singal output feedback signal.
8. Switching Power Supply as claimed in claim 7, is characterized in that, also comprise rectifier, filter capacitor C2, diode D2, sampling resistor R3, divider resistance R4, divider resistance R5 and filter capacitor C3, wherein,
Described isolation drive module is photoelectrical coupler, the first input end of described photoelectrical coupler is connected with the output of described feedback unit, second input termination output signal ground, the first output of described photoelectrical coupler is connected with the feedback end of described oscillation control unit, the second output is connected with the output of described oscillation control unit;
Two inputs of described rectifier are connected with two outputs of described power supply respectively, the common cathode output of described rectifier is connected with the input of described oscillation control unit through described former limit, and the common anode output end of described rectifier is connected with the output of described oscillation control unit;
Described filter capacitor C2 is connected to the common cathode output of described rectifier and is total between anode output end;
The power end of described feedback unit is connected with the negative electrode of described diode D2, the anode of described diode D2 is connected with the Same Name of Ends of described secondary, and the earth terminal of described feedback unit connects output signal ground;
The current detecting end of described feedback unit is connected with the different name end of described secondary and connects with outputing signal through described sampling resistor R3;
The voltage detecting end of described feedback unit outputs signal ground with being connected through described divider resistance R4 with the negative electrode of described diode D2 and connecing through described divider resistance R5;
The negative electrode of described filter capacitor C3 one end and described diode D2 and load is connected, another termination outputs signal ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310148072.6A CN103219893B (en) | 2013-04-25 | 2013-04-25 | Switch power controller and switching power circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310148072.6A CN103219893B (en) | 2013-04-25 | 2013-04-25 | Switch power controller and switching power circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103219893A CN103219893A (en) | 2013-07-24 |
| CN103219893B true CN103219893B (en) | 2015-12-30 |
Family
ID=48817452
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310148072.6A Active CN103219893B (en) | 2013-04-25 | 2013-04-25 | Switch power controller and switching power circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103219893B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104602390B (en) * | 2014-01-14 | 2018-10-19 | 深圳市稳先微电子有限公司 | The LED lamp drive circuit of double winding single-stage primary side feedback |
| CN104578826B (en) * | 2014-12-31 | 2018-10-19 | 上海新进半导体制造有限公司 | Switching Power Supply and the method that constant pressure and current constant control are provided in Switching Power Supply |
| US9685940B2 (en) * | 2015-02-25 | 2017-06-20 | Qualcomm Incorporated | Voltage comparator |
| CN105304018A (en) * | 2015-11-13 | 2016-02-03 | 苏州扬佛自动化设备有限公司 | Interaction display screen control circuit |
| CN106787746B (en) * | 2015-11-24 | 2019-09-10 | 宁波鑫泰电气科技有限公司 | Vehicle charger for electric vehicle circuit |
| CN107809175B (en) * | 2016-09-09 | 2024-01-30 | 苏州力生美半导体有限公司 | Switching power supply, numerical control voltage source and numerical control adjustable reference source chip |
| CN108803399B (en) * | 2017-05-02 | 2024-03-19 | 联合汽车电子有限公司 | Vehicle controller and control method thereof |
| CN117097324B (en) * | 2023-09-04 | 2024-05-31 | 中科赛飞(广州)半导体有限公司 | Level shifting circuit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101820229A (en) * | 2008-05-10 | 2010-09-01 | 技领半导体(上海)有限公司 | Flyback switching converter controller integrated circuit and method |
| CN103051197A (en) * | 2013-01-16 | 2013-04-17 | 绍兴光大芯业微电子有限公司 | Primary-side-control based control circuit structure for flyback switching power supply |
| CN203233312U (en) * | 2013-04-25 | 2013-10-09 | 深圳市明微电子股份有限公司 | Switch power supply controller and switch power supply device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8536850B2 (en) * | 2010-09-13 | 2013-09-17 | Immense Advance Technology Corp. | High side controller capable of sensing input voltage and ouput voltage of a power conversion circuit |
-
2013
- 2013-04-25 CN CN201310148072.6A patent/CN103219893B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101820229A (en) * | 2008-05-10 | 2010-09-01 | 技领半导体(上海)有限公司 | Flyback switching converter controller integrated circuit and method |
| CN103051197A (en) * | 2013-01-16 | 2013-04-17 | 绍兴光大芯业微电子有限公司 | Primary-side-control based control circuit structure for flyback switching power supply |
| CN203233312U (en) * | 2013-04-25 | 2013-10-09 | 深圳市明微电子股份有限公司 | Switch power supply controller and switch power supply device |
Non-Patent Citations (1)
| Title |
|---|
| 精密恒压/恒流输出式单片开关电源的设计原理;沙占友等;《电工技术》;20001130;第30页左栏第1段至第31页左栏第4段及图1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103219893A (en) | 2013-07-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103219893B (en) | Switch power controller and switching power circuit | |
| CN101552560B (en) | Switch voltage stabilizing circuit and control method thereof | |
| US9577543B2 (en) | Constant on time (COT) control in isolated converter | |
| CN104124878B (en) | Power supply module, switching power source chip and switch power supply system | |
| CN103887984A (en) | Isolating converter and switching power supply comprising same | |
| CN205751476U (en) | A kind of power supply circuits of OLED display screen | |
| CN203813661U (en) | Primary control flyback switch power supply control chip and output line voltage compensating circuit | |
| CN103023337B (en) | Power circuit of switching power converter | |
| CN104734498B (en) | DC DC boost modules | |
| CN104426370A (en) | Power supply adapter and adaptive control circuit and adaptive control method of power supply adapter | |
| CN104779783B (en) | A kind of power supply circuit and Switching Power Supply | |
| CN103529890A (en) | Soft start device and method | |
| CN203522529U (en) | Positive and negative voltage power supply circuit, and electronic device requiring positive and negative voltage power supply | |
| CN203398994U (en) | Switching power drive chip and switching power drive device | |
| US9577542B2 (en) | Constant on-time (COT) control in isolated converter | |
| CN203632222U (en) | Output short circuit protection circuit of flyback converter | |
| CN103529891A (en) | Soft start device and method | |
| CN203233312U (en) | Switch power supply controller and switch power supply device | |
| CN101552541A (en) | Universal power adapter | |
| CN205160851U (en) | Two unification powers | |
| CN109471484A (en) | A kind of self-adaptive current output low pressure difference linear voltage regulator | |
| CN106602883B (en) | The power MOS pipe Switching Power Supply of no auxiliary winding integrates power supply circuit | |
| CN203326888U (en) | Light-load and high-efficiency novel-type adapter power supply | |
| CN102299629A (en) | Power supply control method and power supply device for direct-current high-voltage power supply | |
| CN204597781U (en) | Switching power supply circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |