CN101599698A - A kind of micro-power DC-DC power supply and manufacture method thereof - Google Patents
A kind of micro-power DC-DC power supply and manufacture method thereof Download PDFInfo
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Abstract
The embodiment of the invention discloses a kind of micro-power DC-DC power supply and manufacture method thereof, wherein said power supply comprises: Drive and Control Circuit receives input voltage, the generation amplitude equates, two groups of pulse-width modulation PWM drive waveforms that the phase phasic difference is 180 °, described PWM drive waveforms be used for driving be connected with described Drive and Control Circuit recommend translation circuit recommend the switch alternate conduction; The described translation circuit of recommending makes described power output transformer realize voltage transitions by the alternate conduction of self recommending switch; Described power output transformer links to each other with output rectification circuit, by the output rectification circuit output dc voltage, do not need to utilize the saturation characteristic of described power output transformer magnetic core to realize the self-maintained circuit upset, described power output transformer is operated in undersaturated condition, thereby can carry out energy delivery with the highest efficient.
Description
Technical field
The present invention relates to circuit control technology field, relate in particular to a kind of micro-power DC-DC power supply and manufacture method thereof.
Background technology
The micro-power DC-DC modular power source is little with volume, power density is high,, in the electronic equipments such as accessory power supply of communication interface circuit such as plurality of advantages such as efficient height, reliability height various industrial control equipments of being widely used in taking as the leading factor, fieldbus, instrument and meter, Medical Devices, RS485/232 and large power supply with computer, having important use and be worth, is the indispensable a kind of power mode of current electronics and IT products develop rapidly.Especially along with the fast development of data service and the continuous popularization of distributed power supply system, also promoted the develop rapidly of micropower low-power consumption DC-DC modular power source simultaneously.But along with the Market competition of modern electronic product, low cost, miniaturization and portable growth requirement are obvious, require efficient height, the volume of modular power source littler, cost is lower, the process-cycle is shorter.
At present the packing forms of micro-power DC-DC modular power source commonly used has embedding, plastic packaging, seals etc., and internal circuit commonly used mostly adopts the Royar circuit and the Jensen circuit of discrete component.
The Royar circuit theory diagrams as shown in Figure 1, its operation principle is as follows: during input voltage, after resistance R b1, Rb2 dividing potential drop, provide forward bias voltage by resistance R 1, R2 for transistor T R, TR2, transformer T utilizes the saturation characteristic of magnetic core to form self-oscillation and self-driven, energy is passed to secondary output winding N3, N4 through former limit input winding N1, the N2 winding of transformer T1, again through exporting to load after diode D1, the D2 rectification, finishes the conversion output of voltage.The self-oscillation frequency of circuit is by iron core magnetic saturation degree and the decision of the voltage between triode collection-emitter-base bandgap grading of transformer T.
From the circuit theory of Royar circuit as can be seen, circuit characteristic requires transformer should carry out energy delivery, utilize the saturation characteristic of magnetic core to form the self-maintained circuit upset again, increased the physics loss of magnetic core like this, reduced the efficient of transformer energy transmission.Because circuit structure is simple, circuit performance parameters is difficult to realize that balance optimizing, conversion efficiency are relatively low, and when input voltage was higher, the transformer number of turns was more, and small product size can't be dwindled, and is bigger to the magnetic core dimensional requirement, and little magnetic core all can't be realized.
The Jensen circuit has proposed circuit oscillation upset and power delivery are separately realized respectively by oscillation transformer and main power transformer on the basis of Royar circuit.Circuit theory diagrams as shown in Figure 2, its operation principle is as follows: during input voltage, utilize the saturation characteristic of magnetic core to form the self-oscillation frequency by oscillation transformer T1, the alternate conduction of driving transistors, and energy is reached output by input by main power transformer T2, by exporting to load behind the diode rectification, realize the conversion output of voltage and the isolation of circuit again.And transformer T2 is operated in undersaturated condition, thereby realizes that higher energy transmission efficiency is to output.
The inventor is by discovering, the Jensen circuit has improved the conversion efficiency of circuit, has dwindled the volume of product, may realize than higher input voltage, can realize circuit performance optimization easily, but circuit structure is complicated slightly than the Royar circuit, has increased a transformer, and cost improves, assembly technology is also relatively complicated, increased the manufacturing procedure of product, reduced the production and processing efficient of product, these factors affect the quality stability of production virtually.
In addition, the micro-power DC-DC modular power source mostly adopts the packing forms of embedding at present, its manufacturing technique method is as follows: adopt Royar circuit or Jensen circuit as power circuit, at first with enamelled wire by two-wire and around mode will import winding and the output winding is wrapped on the ring type magnetic core uniformly, the schematic diagram of concrete transformer is as shown in Figure 3.Then with the electronic devices and components paster to the respective pad position of pcb board, the input of transformer, output winding and feedback winding are being welded on the pcb board by method shown in Figure 3, after plugging the input and output pin terminal, whole semi-finished product are packed in the shell, and pour into certain resin, after treating resin solidification, a complete production finishes.This production technology adopts the self-excitation push-pull circuit of discrete component, its circuit work frequency is relatively low, the relation that is inversely proportional to according to frequency and the transformer number of turns, under the long-pending condition of same cross-sectional, then transformer needs the more number of turns just can meet the demands, cause like this because the number of turns makes that the making of transformer is comparatively difficult more, the test of semi-finished product transformer is also very complicated, the performance of batch testing semi-finished product transformer acquires a certain degree of difficulty, again because need manual welding in the semi-finished product assembling process, the semi-finished product transformer is in embedding, break easily in the production processes such as test, the fraction defective of finished product is raise, the production process complexity, can not realize mechanical automation production, the quality of product is affected.
Summary of the invention
In view of this, the purpose of the embodiment of the invention is to provide a kind of micro-power DC-DC power supply and manufacture method thereof, make that the power supply architecture that the embodiment of the invention provided is simple, volume is small and exquisite, and its processing technology is simple, can realize mechanical automation production, the quality of product can not be subject to processing the influence of process.
For achieving the above object, the embodiment of the invention provides following technical scheme:
A kind of micro-power DC-DC power supply comprises:
Drive and Control Circuit receives input voltage, produce amplitude and equate, two groups of PWM drive waveforms that the phase phasic difference is 180 °, described PWM drive waveforms be used for driving be connected with described Drive and Control Circuit recommend translation circuit recommend the switch alternate conduction;
The described translation circuit of recommending makes described power output transformer realize voltage transitions by the alternate conduction of self recommending switch;
Described power output transformer links to each other with output rectification circuit, by the output rectification circuit output dc voltage.
Described Drive and Control Circuit is a drive controlling chip IC, and the described switch of recommending is two metal-oxide-semiconductors, wherein:
The earth terminal ground connection of described drive controlling IC, power output end is by decoupling capacitor ground connection, power input inserts input voltage, the first pwm control signal output and the second pwm control signal output are received the grid of second metal-oxide-semiconductor and the grid of first metal-oxide-semiconductor respectively, control end links to each other with the source electrode of first metal-oxide-semiconductor and the source electrode of second metal-oxide-semiconductor, then through first grounding through resistance.
The drain electrode of the drain electrode of described second metal-oxide-semiconductor and described first metal-oxide-semiconductor is connected the end of the same name of second winding of described power output transformer and the different name end of first winding respectively, and the common tap that the end of the same name of first winding of described power output transformer and the different name end of second winding are connected to form connects the input voltage anode.
The end of the same name of the tertiary winding of described power output transformer and the different name end of the 4th winding are connected the positive pole of first diode and second diode respectively;
The different name end of the described power output transformer tertiary winding links to each other with the end of the same name of the 4th winding, receives the negative terminal of output voltage;
The negative pole of described first diode is received the anode of output voltage with after the negative pole of described second diode links to each other.
Preferably, described power output transformer secondary has at least one group of secondary output winding of being made up of the described tertiary winding and the 4th winding.
Preferably, described power supply also comprises:
Input filter capacitor is attempted by between input voltage and the ground.
Preferably, described power supply also comprises:
Output filter capacitor is attempted by between the positive and negative terminal of output voltage.
Preferably, described power supply also comprises:
Output resistance is attempted by between the positive and negative terminal of output voltage.
Preferably, described power supply also comprises:
Voltage stabilizing circuit comprises pressurizer and input, output filter capacitor, and described input, output filter capacitor are connected in parallel on respectively between the positive and negative terminal of input and output voltage of described pressurizer; The anode of the output voltage of described output rectification circuit links to each other with the input of described pressurizer, and the output voltage of described pressurizer is as the output voltage of described micro-power DC-DC power supply.
A kind of manufacture method of micro-power DC-DC power supply comprises:
In magnetic core skeleton, pour into resin and form the SMD power output transformer by the annular power output transformer of toroidal core coiling;
Drive and Control Circuit, the electronic devices and components of recommending translation circuit and output rectification circuit and described power output transformer paster are attached to the relevant position of pcb board, and insert the input and output pin terminal and assemble.
As seen, receive input voltage at the power supply that the embodiment of the invention provided by Drive and Control Circuit, the generation amplitude equates, two groups of PWM drive waveforms that the phase phasic difference is 180 °, described PWM drive waveforms be used for driving be connected with described Drive and Control Circuit recommend translation circuit recommend the switch alternate conduction; The described translation circuit of recommending makes described power output transformer realize voltage transitions by the alternate conduction of self recommending switch; Described power output transformer links to each other with output rectification circuit, by the output rectification circuit output dc voltage, do not need to utilize the saturation characteristic of described power output transformer magnetic core to realize the self-maintained circuit upset, described power output transformer is operated in undersaturated condition, thereby can carry out energy delivery with the highest efficient; Simultaneously, the manufacture method of a kind of micro-power DC-DC power supply that the embodiment of the invention provided makes ring-shaped transformer realize Surface Mounting Technology, has simplified production process, has improved production efficiency greatly, has better guaranteed the stability of product quality.
Description of drawings
Fig. 1 is the schematic diagram of self-excitation push-pull type Royar circuit converter in the prior art;
Fig. 2 is the schematic diagram of self-excitation push-pull type Jensen circuit converter in the prior art;
Fig. 3 is the processing schematic diagram of DC-DC modular power source in the prior art;
Fig. 4 is theory diagram that one embodiment of the invention provided;
Fig. 5 is the circuit theory diagrams of the power supply that one embodiment of the invention provided;
Fig. 6 is the circuit theory diagrams of the power supply that another embodiment of the present invention provided;
Fig. 7 partly cuts open bottom view for power supply SMD transformer that one embodiment of the invention provided;
Fig. 8 is the processing schematic diagram 1 of the method that one embodiment of the invention provided;
Fig. 9 is the processing schematic diagram 2 of the method that another embodiment of the present invention provided.
Embodiment
The embodiment of the invention discloses a kind of micro-power DC-DC power supply and manufacture method thereof, for making purpose of the present invention, technical scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in further detail.
Fig. 4 is the structure chart based on an embodiment of device provided by the present invention.
The micro-power DC-DC power supply that one embodiment of the invention provided comprises Drive and Control Circuit, recommends translation circuit, power output transformer, output rectification circuit are formed.
Described Drive and Control Circuit receives input voltage, the generation amplitude equates, two groups of pulse-width modulations (PWM) drive waveforms that the phase phasic difference is 180 °, described PWM drive waveforms be used for driving be connected with described Drive and Control Circuit recommend translation circuit recommend the switch alternate conduction;
The described translation circuit of recommending makes described power output transformer realize voltage transitions by the alternate conduction of self recommending switch;
Described power output transformer links to each other with output rectification circuit, by the output rectification circuit output dc voltage.
Preferably, in another embodiment of the present invention, in order to guarantee the level and smooth stable of input voltage, can input filter capacitor formation input filter circuit in parallel at the input of drive circuit.
Preferably, in another embodiment of the present invention,, can form output filter circuit at the output of an output rectification circuit output filter capacitor in parallel in order to guarantee the level and smooth stable of output voltage.
In an embodiment of the present invention, described Drive and Control Circuit is realized by a drive controlling chip (IC), directly drives, controls and recommend translation circuit.
In an embodiment of the present invention, the described switching tube of recommending adopts a pair of integrated form metal-oxide-semiconductor of packaging body altogether.When input voltage, drive controlling IC produces amplitude and equates, two groups of PWM drive waveforms that the phase phasic difference is 180 ° drive described two metal-oxide-semiconductor alternate conduction of recommending integrated form in the translation circuit respectively, form certain switching frequency.
Power output transformer reaches output with energy from input, realizes the translation function of voltage and the electrical isolation of input and output.Described power output transformer T can serve as reasons go in ring the magnetic core coiling, be fixed on a patch-type transformer on the magnetic core skeleton.
Below, in conjunction with Fig. 5 the device that the embodiment of the invention provided is described in detail.
Power circuit shown in Figure 5 comprises: input filter circuit 501, Drive and Control Circuit 502, recommend translation circuit 503, power input transformer 504, output rectification circuit 505 and output filter circuit 506.Wherein, Drive and Control Circuit 502 realizes by drive controlling IC, shown in recommend switching tube and can adopt two independently metal-oxide-semiconductors, also can adopt a pair of integrated form metal-oxide-semiconductor of packaging body altogether.Both are pro forma difference, and are identical on the function.What select for use among Fig. 5 is a pair of integrated form metal-oxide-semiconductor of packaging body altogether.
Wherein, the connection of each several part circuit is specially:
Input filter capacitor C1 is connected between voltage input anode and the input ground, and input voltage is carried out filtering.Filtered input voltage vin inserts the 3rd pipe pin (Vin) of drive controlling IC, is drive controlling IC power supply.Stable voltage of the 2nd pipe pin (power output end Vout) output of drive controlling IC is as drive controlling IC internal circuit power supply.Decoupling capacitor C3 is attempted by Vout and GND end, is used to reduce the noise that variation brought because of input voltage.The 1st pin of drive controlling IC (earth terminal GND) ground connection.The grid (i.e. the 1st pin G1 of this integrated form metal-oxide-semiconductor) that the 4th pipe pin (the first pwm control signal output D1) of drive controlling IC and the 6th pin (the second pwm control signal output D2) are received the second metal-oxide-semiconductor grid (i.e. the 3rd pin G2 of this integrated form metal-oxide-semiconductor) and first metal-oxide-semiconductor respectively, the 5th pin control end (control end CS) of drive controlling IC links to each other with the source electrode (i.e. the 5th pin S2 of this integrated form metal-oxide-semiconductor) of the source electrode of first metal-oxide-semiconductor (i.e. the 2nd pin S1 of this integrated form metal-oxide-semiconductor) and second metal-oxide-semiconductor, then through resistance R 1 ground connection; The drain electrode (i.e. the 6th pin D1 of this integrated form metal-oxide-semiconductor) of drain electrode of described second metal-oxide-semiconductor (i.e. the 4th pin D2 of this integrated form metal-oxide-semiconductor) and described first metal-oxide-semiconductor is connected the end of the same name of second winding (N2) of transformer and the different name end of first winding (N1) respectively; The common tap P1 that the end of the same name of first winding of transformer and the different name end of second winding are connected to form connects the input voltage anode; The end of the same name of the tertiary winding of transformer (N3) and the different name end of the 4th winding (N4) are connected the positive pole of diode D1 and D2 respectively; The different name end of the transformer tertiary winding (N3) links to each other with the end of the same name of the 4th winding (N4), receives the negative terminal of output voltage V o; The negative pole of diode D1, D2 links to each other, and receives the anode of output voltage V o; Output capacitance C2 is attempted by the positive and negative terminal of output voltage.
The operation principle of circuit diagram shown in Figure 5 is: input voltage inserts the Vin end of drive controlling IC after 1 filtering of first capacitor C, be drive controlling IC power supply, drive controlling IC will equate from the 4th pin (D2) and two groups of amplitudes of the 6th pin (D1) output, two groups of PWM drive waveforms that the phase phasic difference is 180 ° drive two main power MOS pipes respectively.Because drive controlling IC exports the PWM waveform differ 180 ° on phase place, the alternately conducting and ending of two power MOS switch tubes, that is:
When the first metal-oxide-semiconductor conducting, input voltage vin is added on the first winding N1, and all end of the same name " " current potentials are for just, and the drain D 2 of second metal-oxide-semiconductor is because the voltage of 2Vin is born in the coupling of transformer.Secondary winding tertiary winding terminal voltage of the same name is for just, and through after the diode D1 rectification, after the C2 filtering, electric current outputs in the load; When MOS shutoff, when second metal-oxide-semiconductor begins conducting, because the storage and the leakage inductance of energy, the first metal-oxide-semiconductor drain voltage raises, and by transformer coupled, the drain voltage of second metal-oxide-semiconductor descends.Voltage on the transformer begins oppositely at this moment, and transformer secondary the 4th winding different name end outputs to load for just after diode D2 rectification, C2 filtering.
T reaches output with energy by input by power transformer, realizes the conversion of voltage and the electrical isolation of input and output.
Because adopt integrated control IC as Drive and Control Circuit, the micro-power DC-DC power supply that the embodiment of the invention is provided has had short-circuit protection function; Simultaneously, the switching frequency of described integrated form metal-oxide-semiconductor is by the frequency decision of the PWM waveform of drive controlling IC output.Because the PWM wave period of drive controlling IC output is little, the frequency height makes the operating frequency height of entire circuit.The relation that is inversely proportional to by circuit work frequency and the transformer number of turns and magnetic core sectional area as can be known, under the identical situation of sectional area, because the frequency height the during transformer that the embodiment of the invention provided work, the number of turns of transformer can be significantly reduced, so just reduced the production and processing technology difficulty, simultaneously can dwindle the sectional area of magnetic core, and then make core volume also can reduce greatly, so just can dwindle the volume of product; And for the magnetic core of same size, the embodiment of the invention can be designed the product that higher input voltage requires.
Simultaneously because the on state resistance of integrated form metal-oxide-semiconductor is little more a lot of than common triode, thereby the power supply that the embodiment of the invention is provided compare with existing Jensen circuit or Royar circuit, whole efficiency is greatly improved.
When the output short circuit, the drain-source current I of metal-oxide-semiconductor
DSSharply increase, when making voltage drop on the inductive reactance reach the threshold voltage of opening the IC defencive function, IC regulates duty ratio automatically, and circuit enters guard mode, thereby has realized the output short circuit protection function.
From the above analysis, be optimized coupling, just can realize the optimization of circuit working performance easily, reach and improve circuit conversion efficient, dwindle the purpose of small product size by performance parameter to electronic devices and components in the circuit.
Fig. 6 is the circuit theory diagrams of the micro-power DC-DC power supply that another embodiment of the present invention provided, circuit among circuit among the embodiment shown in Figure 6 and the embodiment shown in Figure 5 is basic identical, difference is in the circuit shown in Figure 6, between output rectification circuit and output filter circuit, be connected in series loop of voltage regulation, be specially: rectifier diode D1, the anode of D2 connects the two ends of power transformer secondary winding respectively, rectifier diode D1, the negative electrode of D2 links together, the centre cap of the secondary winding of power transformer is connected to the negative terminal (Vo-) of output voltage, the end of input filter capacitor C3 is connected to rectifier diode D1, the common cathode end of D2, the other end connects transformer secondary tap P2, insert the 1st pin (input Vin) of pressurizer through the filtered output voltage of filter capacitor input C3, the 2nd pin of pressurizer (earth terminal Gnd) links to each other with the negative terminal (Vo-) of output voltage, the 3rd pin of pressurizer (output end vo ut) is connected to the anode (Vo+) of output voltage, and output filter capacitor C2 is attempted by the positive and negative terminal of the output voltage after the pressurizer voltage stabilizing.Pressurizer can be common linear pressurizer, also can be LDO (low-dropout regulator).Because the stable performance of pressurizer, voltage regulation result is good, after through the pressurizer voltage stabilizing, can improve the stability of product output voltage, improves the precision of output voltage, reduces output ripple, improves output performance.
Preferably, can also increase another equally at the secondary of power output transformer and organize secondary output winding, on this output winding, connect output rectifier and filter same as the previously described embodiments and output loop of voltage regulation equally, as another road output loop, can realize the stabilized voltage power supply of two-way isolation output.
Preferably, in actual applications, can be according to actual needs increase secondary output winding, for example increase by two groups or three groups secondary output windings or the like at secondary at the secondary of described power output transformer.Same output rectifier and filter same as the previously described embodiments and the output loop of voltage regulation of connecting on every group of described secondary output winding as another road output loop, can be realized the stabilized voltage power supply of multichannel isolation output.
Corresponding with micro-power DC-DC power supply, the embodiment of the invention also provides a kind of making micro-power DC-DC power supply method, and this method comprises:
Step S1: make SMD transformer.
As shown in Figure 7, the making step of described SMD transformer is specially:
At first enamelled wire is wrapped on the ring type magnetic core by transformer input, four windings of output (N1, N2, N3, N4), then the ring-shaped transformer that winds is placed square magnetic core skeleton, and the input and output of ring-shaped transformer correspondence lead-in wires is connected respectively on the pin of skeleton correspondence, and in the magnetic core skeleton, pour into after certain resin treats that it solidifies, a complete SMD transformer is made and is finished.
Step S2: product assembling.
As Fig. 8 and shown in Figure 9, described product assembling process comprises:
Earlier electronic devices and components and SMD transformer are attached to the corresponding pad locations of pcb board, insert the input and output pin terminal.At last, the assembling of entire product finishes, and removes pin and connects muscle, has just made an open micro-power DC-DC modular power source product.
Because ring-shaped transformer has realized Surface Mounting Technology, make transformer convenient test a lot, all electronic devices and components all adopt surface mount (SMT) technology, can all realize mechanized operation, reduced artificial factor, the most important thing is to have simplified production process, improved production efficiency greatly, better guaranteed the stability of product quality.
Simultaneously,, saved the costs of raw material such as plastic casing and potting compound resin, reached higher environmental requirement because entire product need not encapsulate.
The micro-power DC-DC power supply of the method manufacturing that the embodiment of the invention provided can form have single-row straight cutting pin (SIP), the open DC-DC modular power source product of dual-in-line pin (DIP) and double surface-adhered type (SMD).
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1, a kind of micro-power DC-DC power supply is characterized in that, comprising:
Drive and Control Circuit receives input voltage, produce amplitude and equate, two groups of pulse-width modulation PWM drive waveforms that the phase phasic difference is 180 °, described PWM drive waveforms be used for driving be connected with described Drive and Control Circuit recommend translation circuit recommend the switch alternate conduction;
The described translation circuit of recommending makes described power output transformer realize voltage transitions by the alternate conduction of self recommending switch;
Described power output transformer links to each other with output rectification circuit, by the output rectification circuit output dc voltage.
2, power supply according to claim 1 is characterized in that, described Drive and Control Circuit is an integrated drive controlling chip IC, and the described switch of recommending is two metal-oxide-semiconductors, wherein:
The earth terminal ground connection of described drive controlling IC, power output end is by decoupling capacitor ground connection, power input inserts input voltage, the first pwm control signal output and the second pwm control signal output are received the grid of second metal-oxide-semiconductor and the grid of first metal-oxide-semiconductor respectively, control end links to each other with the source electrode of first metal-oxide-semiconductor and the source electrode of second metal-oxide-semiconductor, then through first grounding through resistance.
3, power supply according to claim 2 is characterized in that,
The drain electrode of the drain electrode of described second metal-oxide-semiconductor and described first metal-oxide-semiconductor is connected the end of the same name of second winding of described power output transformer and the different name end of first winding respectively, and the common tap that the end of the same name of first winding of described power output transformer and the different name end of second winding are connected to form connects the input voltage anode.
4, power supply according to claim 3 is characterized in that,
The end of the same name of the tertiary winding of described power output transformer and the different name end of the 4th winding are connected the positive pole of first diode and second diode respectively;
The different name end of the described power output transformer tertiary winding links to each other with the end of the same name of the 4th winding, receives the negative terminal of output voltage;
The negative pole of described first diode is received the anode of output voltage with after the negative pole of described second diode links to each other.
5, power supply according to claim 4 is characterized in that, the secondary of described power output transformer has at least one group of secondary output winding of being made up of the described tertiary winding and the 4th winding.
6, according to any described power supply of claim 1～5, it is characterized in that, also comprise:
Input filter capacitor is attempted by between input voltage and the ground.
7, according to any described power supply of claim 1～5, it is characterized in that, also comprise:
Output filter capacitor is attempted by between the positive and negative terminal of output voltage.
8, according to any described power supply of claim 1～5, it is characterized in that, also comprise:
Output resistance is attempted by between the positive and negative terminal of output voltage.
9, according to any described power supply of claim 1～4, it is characterized in that, also comprise:
Voltage stabilizing circuit comprises pressurizer and input, output filter capacitor, and described input, output filter capacitor are connected in parallel on respectively between the positive and negative terminal of input and output voltage of described pressurizer; The anode of the output voltage of described output rectification circuit links to each other with the input of described pressurizer, and the output voltage of described pressurizer is as the output voltage of described micro-power DC-DC power supply.
10, a kind of manufacture method of micro-power DC-DC power supply is characterized in that, comprising:
In magnetic core skeleton, pour into resin and form the SMD power output transformer by the annular power output transformer of toroidal core coiling;
Drive and Control Circuit, the electronic devices and components of recommending translation circuit and output rectification circuit and described power output transformer paster are attached to the relevant position of pcb board, and insert the input and output pin terminal and assemble.
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| CN105161284B (en) * | 2014-12-19 | 2017-08-04 | 国家电网公司 | The resistance to voltage source manufacture method of high isolation |
| CN109891731A (en) * | 2016-10-26 | 2019-06-14 | 三菱电机株式会社 | Power conversion device |
| EP3534519A4 (en) * | 2016-10-26 | 2019-11-06 | Mitsubishi Electric Corporation | Power conversion device |
| US11431259B2 (en) | 2016-10-26 | 2022-08-30 | Mitsubishi Electric Corporation | Power conversion device for reducing voltage ripple and voltage spike via connection of a transformer and a capacitor to a grounding surface |
| CN108574416A (en) * | 2017-03-13 | 2018-09-25 | 捷拓科技股份有限公司 | Auto-excitation type push-pull type conversion circuit |
| CN108574416B (en) * | 2017-03-13 | 2020-10-30 | 捷拓科技股份有限公司 | Self-excited push-pull type conversion circuit |
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| CN111030465B (en) * | 2019-12-24 | 2022-07-19 | 深圳市绿联科技股份有限公司 | Wireless audio receiving device with isolated power supply |
| CN112968587A (en) * | 2021-02-02 | 2021-06-15 | 广州市爱浦电子科技有限公司 | Power supply structure |
| CN112996272A (en) * | 2021-02-02 | 2021-06-18 | 广州市爱浦电子科技有限公司 | Manufacturing method of novel power supply structure |
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| CN115085001A (en) * | 2022-07-19 | 2022-09-20 | 成都英思嘉半导体技术有限公司 | High-speed Mach-Zehnder driver chip controlled by integrated silicon optical integrated circuit |
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