CN1841898A - Multi-output type DC/DC converter and its control method - Google Patents
Multi-output type DC/DC converter and its control method Download PDFInfo
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Abstract
This invention provides a multi-output type DC/DC converter not only operates at a current continuous mode but also operates at a current continuous mode. A controller controls, in accordance with first and second output voltages, turning on/off of a switch circuit (41) and selection (20A) in an output selection circuit. The controller makes the multi-output type DC/DC converter operate at a current discontinuous mode when all of the first and the second loads (31,32) are light. The controller makes the multi-output type DC/DC converter (40A) operate at a current continuous mode when all of the first and the second loads (31,32) are heavy.
Description
Technical field
The present invention relates to a kind of supply unit, particularly use 1 switching circuit to generate the multi-output type DC/DC converter and the control method thereof of a plurality of output voltages.
Background technology
As the supply unit that direct current (DC) input voltage is transformed to the DC output voltage different, known DC/DC converter with this DC input voltage.In addition, for 1 DC input voltage (be designated hereinafter simply as " input voltage "), wishing sometimes provides different separately a plurality of DC output voltages (be designated hereinafter simply as " output voltage ") to a plurality of loads.The DC/DC converter of so a plurality of output voltages of generation as hereinafter described, is divided into Splittable DC/DC converter and multi-output type DC/DC converter.
Splittable DC/DC converter is the switching circuit that has with the number equal number of load (output), and the circuit of electric power (output voltage) is provided to each load.Relative therewith, multi-output type DC/DC converter is to use 1 switching circuit to generate the circuit of a plurality of output voltages.
At first existing Splittable DC/DC converter 10 is described with reference to Fig. 1.The expression of this example has the situation of two loads.
Illustrated Splittable DC/DC converter 10 has first and second switch circuit 11,12; First and second rectifier smoothing circuit 16,17; With first and second control circuit 21,22.Though not expression among the figure, first and second switch circuit 11,12 have coil (inductor) and main switch separately.
First switching circuit, 11 switch input voltages are exported an AC voltage.16 pairs the one AC voltages of first rectifier smoothing circuit carry out rectification and smoothly export first output voltage.This first output voltage is provided for first load 31.First control circuit 21 controls first switching circuit 11 makes first output voltage constant.Specifically, first control circuit 21 provides frequency certain to first switching circuit 11, first pulse width modulation (PWM) signal that pulse duration and the electric power that should offer necessity of first load 31 correspondingly change.
Equally, second switch circuit 12 switch input voltages are exported the 2nd AC voltage.17 pairs the 2nd AC voltages of second rectifier smoothing circuit carry out rectification and smoothly export second output voltage.This second output voltage is provided for second load 32.Second control circuit 22 control second switch circuit 12 make second output voltage constant.Specifically, second control circuit 22 to second switch circuit 12 provide that frequency is certain, pulse duration and should offer second pulse width modulation (PWM) signal that the electric power of necessity of second load 32 correspondingly changes.
Like this, Splittable DC/DC converter 10 is for first and second load 31,32, possesses first and second switch circuit 11,12 respectively; With first and second control circuit 16,17.In addition, in first and second load 31,32, even when a side load becomes underload, also provide electric power with fixed frequency.As previously mentioned, first and each of second switch circuit 11,12 all have not shown coil (inductor).Therefore, in Splittable DC/DC converter, also need coil (inductor) number identical with output quantity.
Then, existing multi-output type DC/DC converter 40 is described with reference to Fig. 2.This example represents that also load (output) is two a occasion.
Illustrated multi-output type DC/DC converter 40 have a switching circuit 41, the time sub-control circuit 42, first and second rectifier smoothing circuit 16,17 and the controller 20.Though do not illustrate, switching circuit 41 has inductor (coil) and main switch.
That is, in multi-output type DC/DC converter 40, the time of carrying out is cut apart control division switch frequency (allocating time slot in advance), provides necessary energy to first and second load 31,32 thus.In addition, such multi-output type DC/DC converter is for example disclosed in patent documentation 1.
In existing multi-output type DC/DC converter 40 shown in Figure 2, by coming to provide its necessary electric power for the conduction period (duty ratio) of the switching circuit 41 of each load to each load in each switch periods (time slot) adjustment.In other words, in multi-output type DC/DC converter 40, give each load allocating time slot in advance, in each time slot, provide necessary electric power each load.Therefore, before the finish time, need make the electric current that flows through inductor is zero at each time slot.Otherwise magnetic energy residual in inductance can discharge to other loads at next time slot.
Like this, this technical field, be called " electric current discontinuous mode " before certain time slot switches to next time slot, moving the pattern that makes the electric current vanishing of flowing through inductor.Relative therewith, in the moment that switches to next time slot from certain time slot, the mode of moving under the non-vanishing state of the electric current that flows through inductor is called " electric current continuation mode " in this technical field.
In addition, also known a kind of switching power circuit that uses single inductor (for example with reference to patent documentation 2).In this switching power circuit also in advance to the load allocating time slot.For example, under situation, two loads are alternatively distributed time slot with two loads.In switching power circuit,, adjust being used for flowing through to single inductor the time (duty ratio) of the main switch conducting of electric current from power supply according to the weight of load.In addition, in patent documentation 2, also disclose and make the energy filling time separately different two loads
Embodiment.
Have again, the single reactor of known a kind of use, the action of control switch element comes control output voltage to make its DC/DC change-over circuits constant, two output types (for example with reference to patent documentation 3).Therefore, even in the DC/DC of this two output type converter, the conduction period of switch element (duty ratio) also changes according to the weight of load.
In addition, the single inductor of also known a kind of use, the backup converter (for example with reference to patent documentation 4) of the conducting/shutoff by the pulse-width modulator control switch unit.In this backup converter, adjust, control voltage output by the work period or the ON time of control switch unit.
Patent documentation 1: the spy opens the 2004-96816 communique
Patent documentation 2: the spy opens the 2003-289666 communique
Patent documentation 3: the spy opens flat 11-168876 communique
Patent documentation 4: specially permit communique No. 3357338
Summary of the invention
Any one piece of disclosed multi-output type DC/DC converter of above-mentioned patent documentation 1～4 also is an ON time (conduction period) of adjusting actuating switch unit (for flow through the switch of electric current to converter from the input power supply) according to the weight of load.Therefore, any one piece of disclosed multi-output type DC/DC converter only can move under the electric current discontinuous mode in the patent documentation 1～4.
Therefore, problem of the present invention is to provide a kind of and can not only moves under the electric current discontinuous mode, the multi-output type DC that can also move under continuous current mode/DC converter.
According to first mode of the present invention, a kind of multi-output type DC/DC converter, it is to use a switching circuit (41; 41A; 41B) generate a plurality of output voltages, described a plurality of output voltages are offered the multi-output type DC/DC converter (40A of corresponding a plurality of loads (31,32) by an input voltage; 40B; 40C; 40D; 40E; 40F; 40G; 40H), it is characterized by, when described a plurality of loads all were underload, described multi-output type DC/DC converter moved under the electric current discontinuous mode, when described a plurality of loads all were heavy duty, described multi-output type DC/DC converter moved under continuous current mode.
In the multi-output type DC/DC converter of the invention described above first mode, the electric power that described multi-output type DC/DC converter can be corresponding should provide to each load decides the frequency that distributes time slot (T).Also can for be that described multi-output type DC/DC converter preferentially provides energy to the load that needs most energy.
According to second mode of the present invention, obtain the control method of a kind of multi-output type DC/DC converter, it is to use a switching circuit (41; 41A; 41B) generate a plurality of output voltages, described a plurality of output voltages are offered the multi-output type DC/DC converter (40A of corresponding a plurality of loads (31,32) by an input voltage; 40B; 40C; 40D; 40E; 40F; 40G; Control method 40H), it is characterized by, control so that when described a plurality of loads all are underload, described multi-output type DC/DC converter is moved under the discontinuous pattern of electric current, when described a plurality of loads all are heavy duty, described multi-output type DC/DC converter is moved under continuous current mode.
In the control method of the multi-output type DC/DC converter of the invention described above second execution mode, can corresponding should decide the frequency that distributes time slot (T) to the electric power that each load provides.Also can for be preferentially to provide energy to the load that needs most energy.
The Third Way according to the present invention obtains a kind of multi-output type DC/DC converter (40A; 40B; 40C; 40D; 40E; 40F; 40G; 40H), it is the output voltage that generates first to N (N is the integer more than or equal to 2) from an input voltage, offer corresponding first to described first to N load (31 to the N output voltage, 32) multi-output type DC/DC converter, it is characterized by, have: the described input voltage of switch is exported the switching circuit (41 of AC voltage; 41A; 41B); Export respectively described first to the N output voltage first to N rectifier smoothing circuit (16,17); Select described first some in the N rectifier smoothing circuit at each time slot (T), the output select circuit (42A) of described AC voltage is provided to the rectifier smoothing circuit of selecting; With according to described first to the N output voltage, control the controller (20A of the selection of described switching circuit conducting/shutoff and described output select circuit; 20B; 20C; 20D; 20E; 20F; 20G), described first to N load (31, when 32) all being underload, described controller moves described multi-output type DC/DC converter under the electric current discontinuous mode, described first to N load (31, when 32) all being heavy duty, described controller moves described multi-output type DC/DC converter under continuous current mode.
Multi-output type DC/DC converter (40A in the invention described above Third Way; 40B; 40C; 40D; 40E; 40F; 40G; 40H), described controller (20A; 20B; 20C; 20D; 20E; 20F; 20G) can be according to described first the output voltage to N, to described first electric power that should provide to N load (31,32) is provided, control the selection of described output select circuit (42A), decision is to the frequency of each load allocating time slot (T).Also can for be described controller (20A; 20B; 20C; 20D; 20E; 20F; 20G) according to described first the output voltage to N, judge that described first needs most the load of energy in the N load (31,32), the selection of controlling described output select circuit (42A) preferentially provides energy to the load of this judgement.
In addition, at the multi-output type DC/DC converter (40A of the Third Way of the invention described above; 40B; 40C; 40D; 40E; 40F; 40G; 40H), described switching circuit (41; 41A; 41B) can be by an inductor (L1) and main switch (S1; S1 S2) constitutes.At this moment, at described main switch (S1; S1 S2) during conducting, makes electric current flow through described inductor (L1) and comes to put aside magnetic energy in this inductor (L1), at described main switch (S1; S1 when S2) turn-offing, emits as electric current the magnetic energy of having put aside in the described inductor (L1) to described output select circuit (42A).Described output select circuit (42A) can by respectively corresponding described first to N load (31,32) first to the N selector switch (SL1 SL2) constitutes.
Multi-output type DC/DC converter (40B in the invention described above Third Way; 40D; 40F; 40G; 40H), described controller (20A; 20C; 20E; 20F; 20G) can be by detecting described first to the N output voltage, export respectively first to the N detection signal (d1, d2) first to N testing circuit (61,62); Generate the oscillator (64) of clock signal (ck); Synchronous with described clock signal, export described main switch (S1 according to described first to the N detection signal; S1, the control signal (co) of control usefulness S2) and be used to select described first the selector switch to N (SL1, signal (s11, rectifier switch control circuit (66 s12) are selected in first to N output SL2); 66B; 66D; 66E; 66F); Be used to make described main switch (S1 with producing according to described control signal; S1, S2) pulse-width modulator (68 of the pwm signal of conducting/shutoff; 68A; 68B) constitute.
In the multi-output type DC/DC converter (40C) of the invention described above Third Way, described controller (20B) can be by detecting described first to the N output voltage, export first the detection signal (d1, first the testing circuit (61,62) d2) respectively to N to N; Generation has the oscillator (64A) of the oscillator signal (tw) of the waveform of the continuous changing unit of amplitude; Described oscillator signal and described first detection signal to N are compared, and the control of exporting described main switch (S1) is with control signal (co) and be used to select the output of described a plurality of selector switches to select signal (s11, control circuit s12) (66A); With pulse-width modulator (68) formation that produces the pwm signal that is used to make described main switch conducting/shutoffs according to described control signal.
In the multi-output type DC/DC converter (40E) of the invention described above Third Way, described controller (20D) can be by detecting described first output voltage to N, export first the detection signal (d1, first the testing circuit (61,62) d2) respectively to N to N; Generate the oscillator (64) of clock signal (ck); Synchronous with described clock signal, according to the main control circuit (66C) of described first to N detection signal output control signal (co); According to described control signal, generate the pulse-width modulator (68A) of the pwm signal be used to make described main switch (S1) conducting/shutoff; Be used to control described first and select signal (s11, ON-OFF control circuit s12) (69) formation with producing to first to N output of conducting/shutoffs of N selector switch according to described pwm signal.
In addition, the symbol affix in the above-mentioned parantheses in order to understand the present invention easily, just an example is not defined.
In the present invention, when a plurality of loads all are underload, multi-output type DC/DC converter is moved under the electric current discontinuous mode, when a plurality of loads all are heavy duty, multi-output type DC/DC converter is moved, so can under electric current discontinuous mode and continuous current mode, move under continuous current mode.
Description of drawings
Fig. 1 is the block diagram of the structure of the existing Splittable DC/DC converter of expression.
Fig. 2 is the block diagram of the structure of expression existing multi-output type DC/DC converter.
Fig. 3 is the block diagram of the structure of expression multi-output type DC of the present invention/DC converter.
Fig. 4 is the block diagram of structure of the multi-output type DC/DC converter of expression first embodiment of the invention.
Fig. 5 is the block diagram of structure of the multi-output type DC/DC converter of expression second embodiment of the invention.
Fig. 6 is the sequential chart of action that is used to illustrate the control circuit of multi-output type DC shown in Figure 5/DC converter.
Fig. 7 is the block diagram of structure of the multi-output type DC/DC converter of expression third embodiment of the invention.
Fig. 8 is the block diagram of structure of the multi-output type DC/DC converter of expression four embodiment of the invention.
Fig. 9 is the block diagram of structure of the multi-output type DC/DC converter of expression fifth embodiment of the invention.
Figure 10 is the sequential chart that is used to illustrate the action of multi-output type DC shown in Figure 9/DC converter.
Figure 11 is the block diagram of structure of the multi-output type DC/DC converter of expression sixth embodiment of the invention.
Figure 12 is the sequential chart that is used to illustrate the action of multi-output type DC shown in Figure 11/DC converter.
Figure 13 is the block diagram of structure of the multi-output type DC/DC converter of expression seventh embodiment of the invention.
Figure 14 is the sequential chart that is used to illustrate the action of multi-output type DC shown in Figure 13/DC converter.
Embodiment
Describe embodiments of the present invention with reference to the accompanying drawings in detail.
With reference to Fig. 3, the principle of multi-output type DC of the present invention/DC converter 40A is described.Here, illustrate the situation that first and second load 31,32 is provided first and second output voltage.In addition, the number N of load also can be more than or equal to 3.
In multi-output type DC of the present invention/DC converter 40A, not in advance to each load allocating time slot.In addition, in multi-output type DC/DC converter 40A, the ON time (conduction period) of the main switch (aftermentioned) of conducting formation switching circuit 41 is irrelevant with the weight of load, and is constant all the time under stable state.
Thus in the present invention, the electric power decision that provides according to each load of reply is to the frequency (number of times) of each load allocating time slot, so can preferentially provide electric power to the load that big electric power should be provided.By such structure, multi-output type DC/DC converter 40A can export the first and second stable output voltage, also can suppress their fluctuation.
In addition as mentioned above, in existing multi-output type DC/DC converter 40, can only under the electric current discontinuous mode, move, but as described later, in multi-output type DC of the present invention/DC converter 40A, can under any pattern of electric current discontinuous mode and continuous current mode, move.For example, when a plurality of loads all were underload, multi-output type DC/DC converter 40A moved under the electric current discontinuous mode, and when a plurality of loads all were heavy duty, multi-output type DC/DC converter 40A moved under continuous current mode.
With reference to Fig. 4, the multi-output type DC/DC converter 40B of first embodiment of the invention is described.Illustrated multi-output type DC/DC converter produces the first and second high output voltage to input voltage, so be called step-up DC/DC converter.
In illustrated multi-output type DC/DC converter 40B, switching circuit 41 is made of inductor L1 and main switch S1.Connect the end of inductor L1 on the anode of dc-input power 50, the other end of inductor L1 is by main switch S1 ground connection.The minus earth of dc-input power 50.The pwm signal control of conducting/shutoff of main switch S1 by providing by controller 20A described later.The switching circuit 41 of this spline structure is called the booster type switching circuit.
Output select circuit 42A is made of the first and second selector switch SL1, SL2.The end of the first selector switch SL1 is connected with the tie point of main switch S1 with inductor L1, and the other end is connected with the input terminal of first rectifier smoothing circuit 16.The end of the second selector switch SL2 is connected with the tie point of main switch S1 with inductor L1, and the other end is connected with the input terminal of second rectifier smoothing circuit 17.Conducting/shutoff of the first selector switch SL1 is selected signal s11 control by first output that is provided by controller 20A.Conducting/shutoff of the second selector switch SL2 is selected signal s12 control by second output that is provided by controller 20A.
Here, though not expression in the drawings, each of first and second testing circuit 61,62 is by the reference voltage source that produces reference voltage; Output voltage is carried out dividing potential drop, the drain resistor of output branch pressure voltage; With benchmark voltage and output voltage, the error amplifier of output detection signal (error signal) constitutes.Each detection signal (error signal) is to reduce the voltage that raises when low when each self-corresponding output voltage is higher than the voltage of wishing.
In addition, 66 outputs of rectifier switch control circuit are used for the control signal co of control impuls width modulator 68.According to this control signal co, pulse-width modulator 68 output is used to control the pulse width modulating signal (pwm signal) of conducting/shutoff of main switch S1.Here to note: irrelevant from the duty ratio of the pwm signal of pulse-width modulator 68 output with the weight of the load that should provide, constant all the time under stable state.In other words, under the stable state that the load of first and second load 31,32 does not change, 68 one-tenth lifes of pulse-width modulator have the pwm signal of constant duty ratio.
As described later, in having the multi-output type DC of this spline structure/DC converter 40B, according to the first and second detection signal d1, d2, it is released in the load of the magnetic energy of putting aside among the inductor L1 to select reply.
The following describes the action of multi-output type DC shown in Figure 4/DC converter 40B.
First and second output voltage that provides to first and second load 31,32 detects by first and second testing circuit 61,62 respectively, obtains the first and second detection signal d1, d2.According to these first and second detection signal d1, d2, rectifier switch control circuit 66 judges which load provides energy (magnetic energy of putting aside) in reply first and second load 31,32 on inductor L1, selects signal s11, s12 and control signal co according to this result of determination output first and second output.
Below specify.In Fig. 4, establish rectifier switch control circuit 66 and judge and to provide energy to first load 31.At this moment, according to control signal co, from pulse-width modulator 68 output PWM from rectifier switch control circuit 66.When this pwm signal was logic high, main switch S1 conducting was put aside magnetic energy on inductor L1.At this moment, the first and second selector switch SL1, SL2 are off states.Then, when the pwm signal from pulse-width modulator 68 outputs became logic low, rectifier switch control circuit 66 sent first output to the first selector switch SL1 and selects signal s11.Thus, turn-off main switch S1, the conducting first selector switch SL1 offers first rectifier smoothing circuit 16 to the magnetic energy of putting aside as electric current on inductor L1.Thus, first output voltage is risen.As a result, provide energy (electric power) to first load 31.
On the other hand, in Fig. 4, establish rectifier switch control circuit 66 and judged and should provide energy to second load 32.At this moment, according to control signal co, from pulse-width modulator 68 output PWM from rectifier switch control circuit 66.When this pwm signal was logic high, main switch S1 conducting was put aside magnetic energy on inductor L1.At this moment, the first and second selector switch SL1, SL2 are off states.Then, when the pwm signal from pulse-width modulator 68 outputs became logic low, rectifier switch control circuit 66 sent second output to the second selector switch SL2 and selects signal s12.Thus, turn-off main switch S1, the conducting second selector switch SL2 offers second rectifier smoothing circuit 17 to the magnetic energy of putting aside as electric current on inductor L1.Thus, second output voltage is risen.As a result, provide energy (electric power) to second load 32.
In addition, in the multi-output type DC/DC converter 40B of above-mentioned first execution mode, having illustrated out and having closed circuit 41 is situations of booster type switching circuit, but switching circuit 41 also can be known adjusting and voltage-reduction switch circuit or a buck-boost type switching circuit in this technical field.
Multi-output type DC/DC converter the 40C of second embodiment of the invention is described with reference to Fig. 5.Illustrated multi-output type DC/DC converter 40C has with the structure that multi-output type DC shown in Figure 4/DC converter 40B is identical and moves except the structure of controller has been carried out change as described later.Therefore, attached to controller with reference symbol 20B.In addition, attached with identical reference symbol to having in Fig. 5 with the unit of Fig. 4 said function, be the explanation of simplified illustration omission to them.In addition, in Fig. 5, omit the diagram of dc-input power 50 and switching circuit 41 shown in Figure 4.
Illustrated controller 20B changes the structure of oscillator as described later, has control circuit 66A simultaneously and replaces rectifier switch control circuit 66, in addition has the structure identical with structure shown in Figure 4 and moves.Therefore, attached to oscillator with reference symbol 64A.
As oscillator signal, oscillator 64A produces triangular signal tw.Control circuit 66A compares this triangular signal tw and the first and second detection signal d1, d2, as described later, selects signal s11, s12 to output select circuit 42A output first or second output.That is, control circuit 66A compares the first and second detection signal d1, d2 in the scope at triangular signal tw place, and according to its size, decision is to select first load, 31 1 sides or select second load, 32 1 sides.
Except Fig. 5,, the action of controller 20B shown in Figure 5 is illustrated in further detail also with reference to Fig. 6.Fig. 6 is the sequential chart (oscillogram) that is used to illustrate the action of controller 20B, (a) expression triangular signal tw and the first and second detection signal d1, d2, (b) expression is from the pwm signal of pulse-width modulator 68 outputs, and (c) signal s11, s12 are selected in first and second output of expression slave controller 66A output.
As mentioned above, the first and second detection signal d1, d2 have the voltage that reduces, raises when hanging down when each self-corresponding output voltage is higher than the voltage of wishing.Therefore, when having compared the first detection signal d1 and the second detection signal d2, the load corresponding with the detection signal with high level is the load that energy should be provided.
Shown in Fig. 6 (a), the interval of the regulation that control circuit 66A reduces from its summit at the level of triangular signal tw, judge among the first detection signal d1 and the second detection signal d2 which consistent with the level of triangular signal tw (intersecting) earlier.
That is, intersect with triangular signal tw earlier, so control circuit 66A judges the level height of the second detection signal d2 than the first detection signal d1 at this moment t1 at the moment t1 second detection signal d2.This means with first load 31 and compare, second load 32 is only provided than the second low output voltage of voltage of wishing.That is, control circuit 66A judges that second load 32 is the loads that need most energy, must be preferentially to second load, 32 energizes.Therefore, control circuit 66A sends to the second selector switch SL2 (Fig. 4) of output select circuit 42A and is used to make second output of its conducting to select signal s12.
Also intersect with triangular signal tw earlier at the moment t2 second detection signal d2, must preferentially provide energy to second load 32 so control circuit 66A judges.Therefore, control circuit 66A sends second output to the second selector switch SL2 (Fig. 4) of output select circuit 42A and selects signal s12.
On the other hand, at moment t3, the first detection signal d1 intersects with triangular signal tw earlier.Its result, control circuit 66A judges must preferentially provide energy to first load 31.Therefore, control circuit 66A sends to the first selector switch SL1 (Fig. 4) of output select circuit 42A and is used to make first output of its conducting to select signal s11.
As mentioned above, as basic point, the load that the detection signal that intersects to elder generation and triangular signal tw is corresponding provides energy to multi-output type DC/DC converter 40C with the summit of triangular signal tw.
In addition, in the above-described embodiment, generate triangular signal, but also can be the oscillator signal beyond the square-wave signal as oscillator signal oscillator 64A.As such oscillator signal, for example consider sawtooth signal or sine wave signal.That is, oscillator signal so long as have the signal of the waveform of the continuous changing unit of amplitude can.
With reference to Fig. 7, the multi-output type DC/DC converter 40D of third embodiment of the invention is described.Illustrated multi-output type DC/DC converter 40D has with the structure that multi-output type DC shown in Figure 4/DC converter 40B is identical and moves except the structure that has changed switching circuit and controller as described later.Therefore, attached respectively to switching circuit and controller with reference symbol 41A and 20C.In addition, attached with identical reference symbol to having in Fig. 7 with the unit of Fig. 4 identical function, omit explanation for the purpose of simplifying the description to them.
Illustrated switching circuit 41A is made of first to the 3rd switch S 1～S3 and inductor L1.First switch S 1 is a main switch.One end of first switch S 1 is connected with the anode of dc-input power 50, and the other end of first switch S 1 is connected with the end of inductor L1 and the end of second switch S2.The other end ground connection of second switch S2.The other end of inductor L1 is connected with the input terminal of output select circuit 42A, is connected with an end of the 3rd switch S 3 simultaneously.The other end ground connection of the 3rd switch S 3.Conducting/shutoff of first to the 3rd switch S 1～S3 is controlled by first to the 3rd pwm signal that is provided by controller 20C described later respectively.
The switching circuit 41A of Gou Chenging can move under a certain mode of booster type, buck-boost type, voltage-dropping type by the control of controller 20C described later like this.
The following describes the action of multi-output type DC shown in Figure 7/DC converter 40D.Here, correspondence offers the input voltage height of first output voltage of first load 31 than dc-input power 50 for example, and second output voltage situation lower than the input voltage of dc-input power 50 that should offer second load 32 describes.Therefore, multi-output type DC/DC converter 40D moves as step-up DC/DC converter for first load 31, moves as voltage-dropping type DC/DC converter for second load 32.Therefore this moment, switching circuit 41A moves as the buck-boost type switching circuit as described later.
First and second output voltage that provides to first and second load 31,32 is detected by first and second testing circuit 61,62 respectively, exports the first and second detection signal d1, d2 respectively from first and second testing circuit 61,62.According to this first and second detection signal d1, d2, rectifier switch control circuit 66B judges should be to which provides energy in first and second load 31,32.Be judged to be provide energy to first load 31 time, rectifier switch control circuit 66B as described later, by control signal co control impuls width modulator 68A, make switching circuit 41A carry out first to the 3rd such pwm signal of boost action by pulse-width modulator 68A generation, send first output to output select circuit 42A simultaneously and select signal s11.Otherwise, judging and provide under the situation of energy second load 32, rectifier switch control circuit 66B as described later, by control signal co control impuls width modulator 68A, make switching circuit 41A carry out first to the 3rd such pwm signal of step-down action by pulse-width modulator 68A generation, send the second output selection signal s12 to output select circuit 42A simultaneously.
At first, subtend first load 31 provides the situation of energy to describe.In this case, at first, by the first and the 3rd pwm signal that is generated by pulse-width modulator 68A, conducting first and the 3rd switch S 1 and S3 put aside magnetic energy in inductor L1.Then, turn-off the 3rd switch S 3 by the 3rd pwm signal that generates by pulse-width modulator 68A, select the signal s11 conducting first selector switch SL1 by first output, the magnetic energy of having put aside in inductor L1 is discharged to first rectifier smoothing circuit 16 as electric current, generate first output voltage that input voltage has been carried out boosting by first rectifier smoothing circuit 16.
Then, subtend second load 32 provides the situation of energy to describe.In this case, at first, the first and the 3rd pwm signal conducting first and the 3rd switch S 1 and S3 by being generated by pulse-width modulator 68A put aside magnetic energy in inductor L1.Then, turn-off the first and the 3rd switch S 1, S3 by the first and the 3rd pwm signal that generates by pulse-width modulator 68A, by the second pwm signal conducting second switch S2, select the signal s12 conducting second selector switch SL2 by second output, the magnetic energy of having put aside in inductor L1 is discharged to second rectifier smoothing circuit 17 as electric current, generate second output voltage that has reduced input voltage by second rectifier smoothing circuit 17.
With reference to Fig. 8, the multi-output type DC/DC converter 40E of four embodiment of the invention is described.Illustrated multi-output type DC/DC converter 40E has with the structure that multi-output type DC shown in Figure 7/DC converter 40D is identical and moves except the structure of controller has been carried out change as described later.Therefore, attached to controller with reference symbol 20D.In addition, attached with identical reference symbol to having in Fig. 8 with the unit of Fig. 7 identical function, be the explanation of simplified illustration omission to them.
Controller 20D replaces the rectifier switch control circuit 66A except having main control circuit 66C and ON-OFF control circuit 69, has the structure identical with controller 20C shown in Figure 7 and moves.
The clock signal ck that master controller 66C and oscillator 64 provide is synchronous, according to the first and second detection signal d1, the d2 that are provided by first and second testing circuit 61,62, to the pulse-width modulator 68A co that transmits control signal.ON-OFF control circuit 69 is used the pwm signal that has been generated by pulse-width modulator 68A, and output is used for the first and second output selection signal s11, s12 that conducting/shutoffs of the first and second selector switch SL1, the SL2 of output select circuit 42A controlled.
Promptly, in this multi-output type DC/DC converter 40E, the pwm signal that use has been generated by pulse-width modulator 68A is controlled conducting/shutoffs of the first and second selector switch SL1, the SL2 of output select circuit 42A explicitly and is moved with conducting/shutoff action of first to the 3rd switch S 1～S3.
The action of multi-output type DC shown in Figure 8/DC converter 40E is identical with the action of above-mentioned multi-output type DC/DC converter 40D shown in Figure 7, think that simplified illustration omits the explanation to it.
Below, with reference to Fig. 9, the multi-output type DC/DC converter 40F of fifth embodiment of the invention is described.
Illustrated multi-output type DC/DC converter 40F has with the structure that multi-output type DC shown in Figure 4/DC converter 40B is identical and moves except change has been carried out in the action of controller as described later.Therefore, attached to controller with reference symbol 20E.In addition, attached with identical reference symbol to having in Fig. 9 with the unit of Fig. 4 identical function, be the explanation of simplified illustration omission to them.
Even illustrated multi-output type DC/DC converter 40F has taken place as described later, also to provide the first and second stable output voltage to first and second load 31,32 under the situation of change at the weight of first and second load 31,32.
Below, except Fig. 9 also with reference to Figure 10, the action of multi-output type DC shown in Figure 9/DC converter 40F is described.Here, be heavy duty for example to first load 31, second load 32 describes for underloaded situation.Figure 10 is the sequential chart that is used to illustrate the action of multi-output type DC/DC converter 40F, (a) conducting/off state of expression main switch S1, (b) conducting/off state of the expression first selector switch SL1, (c) conducting/off state of the expression second selector switch SL2, (d) expression is from first output voltage of first rectifier smoothing circuit, 16 outputs, (e) expression is from second output voltage of second rectifier smoothing circuit, 17 outputs, and (f) electric current of inductor L1 is flow through in expression.
Because first load 31 is heavy dutys, so shown in Figure 10 (d), sharply reduce from first output voltage of first rectifier smoothing circuit, 16 outputs.On the other hand, because second load 32 is underloads, so shown in Figure 10 (e), slowly reduce from second output voltage of second rectifier smoothing circuit, 17 outputs.
At this moment, rectifier switch control circuit 66D makes pulse-width modulator 68 output pwm signals come conducting/shutoff of the main switch S1 of control switch circuit 41 to pulse-width modulator 68 output control signal co.Here, shown in Figure 10 (a), note the ON time T of main switch S1
ONConstant.In other words, under stable state, the ON time T of each time slot T
ONAll the time constant.
When 1 conducting of first switch S, flow through electric current from dc-input power 50 to inductor L1, in inductor L1, put aside magnetic energy.
On the other hand, rectifier switch control circuit 66D judges the load that energy should be provided in first and second load 31,32 according to the first and second detection signal d1, d2 from 61,62 outputs of first and second testing circuit.As mentioned above, because first load 31 is heavy dutys, second load 32 is underloads, so first output voltage is compared rapid reduction with second output voltage.Its result, rectifier switch control circuit 66D controls, and making to provide the number of times (frequency) of energy more than the number of times (frequency) that energy should be provided to second load 32 to first load 31.
In the example of present embodiment, shown in Figure 10 (b), 4 time slot 4T as a repetition period T
P, rectifier switch control circuit 66D is at a repetition period T
PIn three time slots between, signal s11 is selected in output first output, makes the first selector switch SL1 conducting of output select circuit 42A, at a repetition period T
PBetween the magnetic energy in inductor L1, put aside of three handles discharge to first load 31 by first rectifier smoothing circuit 16 as electric current.On the other hand, shown in Figure 10 (c), rectifier switch control circuit 66D is at a repetition period T
PIn a time slot between, output second output selects signal s12 to make the second selector switch SL2 conducting of output select circuit 42A, at a repetition period T
PBetween only once the magnetic energy of having put aside in inductor L1 is discharged to second load 32 by second rectifier smoothing circuit 17 as electric current.
Thus, shown in Figure 10 (d) and Figure 10 (e), can supply with the first and second stable output voltage to first and second load 31,32 respectively.
In a word, as mentioned above, the weight of the corresponding load of multi-output type DC/DC converter 40F, each load of decision reply provides the number of times (frequency) of energy.
In addition, under the situation of present embodiment, owing to select the number of times (frequency) of the 2nd load 32 to lack than the number of times (frequency) of selecting first load 31, so shown in Figure 10 (e), can reduce the fluctuation of second output voltage.
In addition, shown in Figure 10 (f), the electric current that flows through inductor L1 before a downward time slot switches from a certain time slot, temporarily is zero just.Therefore in this example as can be known multi-output type DC/DC converter 40F under the electric current discontinuous mode, move.Example shown in Figure 10 represents that side's load (being first load 31 in this example) is a heavy duty, and the opposing party's load (being second load 32 in this example) is underloaded situation.Therefore, the professional should easily understand: in whole loads all is under the underloaded situation, and multi-output type DC/DC converter 40F moves under the electric current discontinuous mode.
Below, with reference to Figure 11, the multi-output type DC/DC converter 40G of sixth embodiment of the invention is described.
Illustrated multi-output type DC/DC converter 40G has with the structure that multi-output type DC shown in Figure 4/DC converter 40B is identical and moves except change has been carried out in the action of controller as described later.Therefore, attached to controller with reference symbol 20F.In addition, attached with identical reference symbol to having in Figure 11 with the unit of Fig. 4 identical function, be the explanation of simplified illustration omission to them.
Controller 20F except the action of rectifier switch control circuit as described later with shown in Figure 4 different, have the structure identical with controller 20A shown in Figure 4.Therefore, attached to the rectifier switch control circuit with reference symbol 66E.
Illustrated multi-output type DC/DC converter 40G is illustrated in the example of action under the electric current discontinuous mode.Much less, illustrated multi-output type DC/DC converter 40G can move under any pattern of continuous current mode and electric current discontinuous mode.Saying that in detail multi-output type DC/DC converter 40G is under the underloaded situation in whole loads, move under the electric current discontinuous mode, is under the heavy duty situation in whole loads, moves under continuous current mode.In addition, be underload and other loads are under the heavy duty situation in certain load, to state that should load, under multi-output type DC/DC converter 40G certain pattern in continuous current mode and electric current discontinuous mode or under two kinds of patterns, move.
Below, except Figure 11,, the action of multi-output type DC shown in Figure 11/DC converter 40G is described also with reference to Figure 12.As mentioned above, first load 31 and second load 32 both (all) all are heavy dutys.Figure 12 is the sequential chart that is used to illustrate the action of multi-output type DC/DC converter 40G, (a) conducting/off state of expression main switch S1, (b) conducting/off state of the expression first selector switch SL1, (c) conducting/off state of the expression second selector switch SL2, (d) expression is from first output voltage of first rectifier smoothing circuit, 16 outputs, (e) expression is from second output voltage of second rectifier smoothing circuit, 17 outputs, and (f) electric current of inductor L1 is flow through in expression.
First and second load, 31,32 boths are heavy dutys, so sharply reduce as Figure 12 (d) and (e) from the first and second output voltage both of first and second rectifier smoothing circuit, 16,17 outputs.
At this moment, rectifier switch control circuit 66E is to pulse-width modulator 68 output control signal co, the conducting/shutoff that comes the main switch S1 of control switch circuit 41 from pulse-width modulator 68 output pwm signals.Here, even in this example, also shown in Figure 12 (a) and should provide the load of energy irrelevant, the ON time T of main switch S1
ONConstant.In other words, under stable state, the ON time T of each time slot T
ONAll the time constant.
But, the ON time T of the main switch S1 shown in Figure 12 (a)
ONON time T than the main switch S1 shown in Figure 10 (a)
ONLong.This be because: first and second load, 31,32 both sides are heavy dutys in this example, so must provide enough energy to two loads 31,32.
When 1 conducting of first switch S, flow through electric current from dc-input power 50 to inductor L1, in inductor L1, put aside magnetic energy.
On the other hand, rectifier switch control circuit 66E judges the load that energy should be provided it in first and second load 31,32 according to the first and second detection signal d1, d2 from 61,62 outputs of first and second testing circuit.As mentioned above, first and second load, 31,32 both sides are heavy dutys in this example, so the first and second output voltage both sides sharply reduce.Its result, rectifier switch control circuit 66E controls, and makes the number of times (frequency) that should provide energy to first load 31 and should provide the number of times (frequency) of energy identical to second load 32.
Shown in Figure 12 (a), the ON time T among the time slot T
ONShared ratio (duty ratio) is big.Therefore, shown in Figure 12 (f), do not become zero in the moment of switching from the downward time slot of certain time slot even flow through the electric current of inductor L1 yet.That is, multi-output type DC/DC converter 40G moves under continuous current mode.In addition, shown in Figure 12 (f), can reduce to flow through the peak current of inductor L1.Action is irrelevant like this and under continuous current mode, and shown in Figure 12 (d) and Figure 12 (e), multi-output type DC/DC converter 40G can supply with the first and second stable output voltage to first and second load 31,32 respectively.
In a word, as mentioned above, all be under the situation of heavy duty (overload) in whole loads, multi-output type DC/DC converter 40G can move under continuous current mode, provides stable output voltage to all loads.Why can be in this wise under continuous current mode action be because: different with existing multi-output type DC/DC converter, in multi-output type DC of the present invention/DC converter, irrelevant with the weight of load, for the ON time T of the main switch S1 among each time slot T under stable state
ONAll the time constant and control.
With reference to Figure 13, the multi-output type DC/DC converter 40H of seventh embodiment of the invention is described.Illustrated multi-output type DC/DC converter 40H has with the structure that multi-output type DC shown in Figure 4/DC converter 40B is identical and moves except the structure of switching circuit and controller has been carried out change as described later.Therefore, attached respectively to switching circuit and controller with reference symbol 41B, 20G.In addition, attached with identical reference symbol to having in Figure 13 with the unit of Fig. 4 identical function, be the explanation of simplified illustration omission to them.
Illustrated switching circuit 41B by first and second switch S1, S2 and inductor L1 constitute.The combination of first switch S 1 and second switch S2 is moved as main switch.One end of first switch S 1 is connected with the anode of dc-input power 50, and the other end of first switch S 1 is connected with the end of inductor L1.The other end of inductor L1 is connected with the end of second switch S2 when being connected with the first input end of output select circuit 42A is sub.The other end ground connection of second switch S2.In addition, the other end of first switch S 1 is connected with second input terminal of output select circuit 42A.First and first and second pwm signal control that provides by controller 20G described later respectively of conducting/shutoff of second switch S1, S2.
The switching circuit 41B of Gou Chenging is by the control of controller 20G described later, as booster type and counter-rotative type action like this.
In output select circuit 42A, the end of the first selector switch SL1 is connected with its first input end, and the other end is connected with the input terminal of first rectifier smoothing circuit 16.The end of the second selector switch SL2 is connected with its second input terminal, and the other end is connected with the input terminal of second rectifier smoothing circuit 17.In addition, each of the first and second selector switch SL1, SL2 can be made of diode.
Controller 20G except the action of pulse-width modulator and rectifier switch control circuit as described later with shown in Figure 4 different, have the structure identical with controller 20A shown in Figure 4.Therefore, pulse-width modulated device and rectifier switch control circuit are attached respectively with reference symbol 68B and 66F.
The following describes the action of multi-output type DC shown in Figure 13/DC converter 40H.First output voltage that should offer first load 31 is the voltage higher than the input voltage of dc-input power 50, and second output voltage that should offer second load 32 is the negative voltages that the input voltage of dc-input power 50 carried out counter-rotating.Therefore, multi-output type DC/DC converter 40H, moves as counter-rotative type DC/DC converter for second load 32 as step-up DC/DC converter action for first load 31.Therefore, switching circuit 41B as described later, as boosting counter-rotative type switching circuit action.
First and second output voltage that offers first and second load 31,32 is detected by first and second testing circuit 61,62 respectively, exports the first and second detection signal d1, d2 respectively from first and second testing circuit 61,62.According to these first and second detection signal d1, d2, rectifier switch control circuit 66F judges provide energy to which load in first and second load 31,32.Be judged to be and providing under the situation of energy to first load 31, rectifier switch control circuit 66F as described later, by control signal co control impuls width modulator 68B, when pulse-width modulator 68B generation switching circuit 41B carries out the first and second such pwm signal of boost action, send first output to output select circuit 42A and select signal s11.Otherwise, be judged to be and providing under the situation of energy to second load 32, rectifier switch control circuit 66F as described later, by control signal co control impuls width modulator 68B, in the first and second such pwm signal of the action of reversing from pulse-width modulator 68B generation switching circuit 41B, send second output to output select circuit 42A and select signal s12.
The situation that energy is provided to first load 31 at first is described.In this case, at first, by first and second pwm signal that pulse-width modulator 68B generates, conducting first and second switch S1 and S2 put aside magnetic energy in inductor L1.Then, second pwm signal that generates by pulse-width modulator 68B turn-offs second switch S2, select the signal s11 conducting first selector switch SL1 by first output, the magnetic energy of having put aside in inductor L1 is discharged to first rectifier smoothing circuit 16 as electric current, generate first output voltage that input voltage has been carried out boosting by first rectifier smoothing circuit 16.
Then, the situation that energy is provided to second load 32 is described.In this case, at first, by first and second pwm signal that pulse-width modulator 68B generates, conducting first and second switch S1 and S2 put aside magnetic energy in inductor L1.Then, first pwm signal that generates by pulse-width modulator 68B turn-offs a S1, select the signal s12 conducting second selector switch SL2 by second output, the magnetic energy of having put aside in inductor L1 is discharged to second rectifier smoothing circuit 17 as electric current, generate second output voltage that input voltage has been carried out counter-rotating by second rectifier smoothing circuit 17.
Below, except Figure 13,, the action of multi-output type DC shown in Figure 13/DC converter 40H is described in further detail also with reference to Figure 14.Here, represent that first load 31 and second load 32 both (all) all are heavy duty situations.Figure 14 is the sequential chart that is used to illustrate the action of multi-output type DC/DC converter 40H, (a) conducting/off state of expression first switch S 1, (b) conducting/off state of expression second switch S2, (c) conducting/off state of the expression first selector switch SL1, (d) conducting/off state of the expression second selector switch SL2, (e) expression is from first output voltage (booster voltage) of first rectifier smoothing circuit, 16 outputs, (f) expression is from second output voltage (negative voltage) of second rectifier smoothing circuit, 17 outputs, and (g) electric current of inductor L1 is flow through in expression.
Because first and second load, 31,32 boths are heavy dutys, so sharply descend as Figure 14 (e) and (f) from the absolute value of first and second output voltage of first and second rectifier smoothing circuit 16,17 output.
At this moment, rectifier switch control circuit 66F is to the pulse-width modulator 68B co that transmits control signal, so that come conducting/shutoff of first and second switch S1 and the S2 of control switch circuit 41B from pulse-width modulator 68B output pwm signal.Here, in this example also shown in Figure 14 (a) and should provide the load of energy irrelevant, first and the ON time T of second switch S1 and S2 both sides' (main switch) conducting
ONConstant.In other words, under stable state, the conduction period T among each time slot T
ONAll the time constant.
When first and when second switch S1 and S2 both sides' conducting, flow through electric current from dc-input power 50 to inductor L1, in inductor L1, put aside magnetic energy.
On the other hand, rectifier switch control circuit 66F judges the load that energy should be provided it in first and second load 31,32 according to the first and second detection signal d1, d2 from 61,62 outputs of first and second testing circuit.As mentioned above, in the present example because first and second load, 31,32 both sides are heavy dutys, so the absolute value both sides of first and second output voltage sharply reduce.Its result, rectifier switch control circuit 66F controls, and makes the number of times (frequency) that should provide energy to first load 31 and should provide the number of times (frequency) of energy identical to second load 32.
In a word, shown in Figure 14 (e) and figure (f), multi-output type DC/DC converter 40H can provide stable first output voltage (booster voltage) and second output voltage (negative voltage) to first and second load 31,32 respectively.
More than describe the present invention by preferred forms, but the present invention is not limited to above-mentioned execution mode.For example, in the above-described embodiment, be that 2 situation is illustrated only, even but those skilled in the art should be able to understand load number N also can similarly be suitable for more than or equal to 3 to load number N.
Claims (14)
1. multi-output type DC/DC converter, it uses a switching circuit to generate a plurality of output voltages by an input voltage, and described a plurality of output voltages are offered a plurality of loads of correspondence, it is characterized in that,
When described a plurality of loads all were underload, described multi-output type DC/DC converter moved under the electric current discontinuous mode, and when described a plurality of loads all were heavy duty, described multi-output type DC/DC converter moved under continuous current mode.
2. multi-output type DC according to claim 1/DC converter is characterized in that,
Described multi-output type DC/DC converter correspondence decides the frequency that distributes time slot to the electric power that each load should provide.
3. multi-output type DC according to claim 1/DC converter is characterized in that,
Described multi-output type DC/DC converter preferentially provides energy to the load that needs most energy.
4. the control method of multi-output type DC/DC converter, it is to use a switching circuit to generate a plurality of output voltages by an input voltage, described a plurality of output voltages are offered the control method of the multi-output type DC/DC converter of corresponding a plurality of loads, it is characterized in that
Control so that when described a plurality of loads all are underload, described multi-output type DC/DC converter is moved under the discontinuous pattern of electric current, when described a plurality of loads all are heavy duty, described multi-output type DC/DC converter is moved under continuous current mode.
5. the control method of multi-output type DC according to claim 4/DC converter is characterized in that, correspondence should decide the frequency that distributes time slot to the electric power that each load provides.
6. the control method of multi-output type DC according to claim 4/DC converter is characterized in that, preferentially provides energy to the load that needs most energy.
7. multi-output type DC/DC converter, it generates the output voltage of first to N (N is the integer more than or equal to 2) by an input voltage, and described first to N output voltage is offered first load to N respectively, it is characterized in that,
Have:
The described input voltage of switch is exported the switching circuit of AC voltage;
Export respectively described first to N output voltage first to the N rectifier smoothing circuit;
Select described first some in the N rectifier smoothing circuit at each time slot, and the output select circuit of described AC voltage is provided to the rectifier smoothing circuit of selecting; With
According to described first to the N output voltage, control the controller of the selection of described switching circuit conducting/shutoff and described output select circuit,
Described first when the N load all is underload, described controller moves described multi-output type DC/DC converter under the electric current discontinuous mode, described first when the N load all is heavy duty, described controller moves described multi-output type DC/DC converter under continuous current mode.
8. multi-output type DC according to claim 7/DC converter is characterized in that,
Described controller is according to described first output voltage to N, and correspondence should be to described first electric power that provides to the N load, and the selection of controlling described output select circuit decides the frequency to each load allocating time slot.
9. multi-output type DC according to claim 7/DC converter is characterized in that,
Described controller is according to described first output voltage to N, judge to need most the load of energy described first in the load of N, and the selection of controlling described output select circuit preferentially provides energy to this load of having judged.
10. according to any one described multi-output type DC/DC converter of claim 7 to 9, it is characterized in that,
Described switching circuit has an inductor and main switch, when described main switch conducting, make electric current flow through described inductor and come in this inductor, to put aside magnetic energy, when described main switch turn-offs, the magnetic energy of having put aside in described inductor is discharged to described output select circuit as electric current.
11. multi-output type DC according to claim 10/DC converter is characterized in that,
Described output select circuit is made of corresponding described first first selector switch to N to the N load respectively.
12. multi-output type DC according to claim 11/DC converter is characterized in that, described controller has:
First testing circuit to N detects described first to the N voltage of exporting, and exports first detection signal to N respectively;
Oscillator, clocking;
The rectifier switch control circuit, synchronous with described clock signal, export the control signal of described main switch control usefulness and be used to select first to N output of described first to N selector switch to select signal to the detection signal of N according to described first; With
Pulse-width modulator generates the pwm signal that is used to make described main switch conducting/shutoff according to described control signal.
13. multi-output type DC according to claim 11/DC converter is characterized in that, described controller has:
First testing circuit to N detects described first output voltage to N, exports first detection signal to N respectively;
Oscillator, generation has the oscillator signal of the waveform of the continuous changing unit of amplitude;
Control circuit compares described oscillator signal and described first detection signal to N, exports the control of described main switch and selects the output of described a plurality of selector switches to select signal with control signal with being used to; With
Pulse-width modulator generates the pwm signal that is used to make described main switch conducting/shutoff according to described control signal.
14. multi-output type DC according to claim 11/DC converter is characterized in that, described controller has:
First testing circuit to N detects described first output voltage to N, exports first detection signal to N respectively;
Oscillator generates clock signal;
Main control circuit, synchronous with described clock signal, according to described first to N detection signal output control signal;
Pulse-width modulator according to described control signal, generates the pwm signal that is used to make described main switch conducting/shutoff; With
ON-OFF control circuit generates the output selection signal of conducting/shutoffs that is used to control described first to N selector switch according to described pwm signal.
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| JP2005100941 | 2005-03-31 | ||
| JP2005100941 | 2005-03-31 | ||
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101083432B (en) * | 2007-07-06 | 2010-05-19 | 天津英诺华微电子技术有限公司 | Single electric inductance multiplex output boosted circuit |
| CN101202504B (en) * | 2006-12-13 | 2012-07-04 | 奇美电子股份有限公司 | DC-DC Converter |
| CN103023135A (en) * | 2011-09-24 | 2013-04-03 | 辽宁省电力有限公司大连供电公司 | Multi-level direct current transformation power supply device |
| CN106533136A (en) * | 2016-12-19 | 2017-03-22 | 成都芯源系统有限公司 | Multi-channel switching power supply and controller and control method thereof |
| CN108134517A (en) * | 2018-01-31 | 2018-06-08 | 南京溯远基因科技有限公司 | High voltage power supply and DNA sequencer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101202504B (en) * | 2006-12-13 | 2012-07-04 | 奇美电子股份有限公司 | DC-DC Converter |
| CN101083432B (en) * | 2007-07-06 | 2010-05-19 | 天津英诺华微电子技术有限公司 | Single electric inductance multiplex output boosted circuit |
| CN103023135A (en) * | 2011-09-24 | 2013-04-03 | 辽宁省电力有限公司大连供电公司 | Multi-level direct current transformation power supply device |
| CN106533136A (en) * | 2016-12-19 | 2017-03-22 | 成都芯源系统有限公司 | Multi-channel switching power supply and controller and control method thereof |
| CN106533136B (en) * | 2016-12-19 | 2019-03-22 | 成都芯源系统有限公司 | Multi-channel switching power supply and controller and control method thereof |
| CN109713894A (en) * | 2017-10-25 | 2019-05-03 | 南亚科技股份有限公司 | Electronic system and its manufacturing method |
| US10627840B2 (en) | 2017-10-25 | 2020-04-21 | Nanya Technology Corporation | Electronic system for adjusting operating voltage and method of manufacturing the same |
| CN109713894B (en) * | 2017-10-25 | 2020-05-08 | 南亚科技股份有限公司 | Electronic system and method of making the same |
| CN108233470A (en) * | 2017-12-28 | 2018-06-29 | 广州邦讯信息系统有限公司 | Battery feed circuit |
| CN108134517A (en) * | 2018-01-31 | 2018-06-08 | 南京溯远基因科技有限公司 | High voltage power supply and DNA sequencer |
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