CN104953847A - Isolated DC/DC (direct current/direct current) power supply module adopting ultra-wide input range and ultra-low output voltage - Google Patents
Isolated DC/DC (direct current/direct current) power supply module adopting ultra-wide input range and ultra-low output voltage Download PDFInfo
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- CN104953847A CN104953847A CN201510367729.7A CN201510367729A CN104953847A CN 104953847 A CN104953847 A CN 104953847A CN 201510367729 A CN201510367729 A CN 201510367729A CN 104953847 A CN104953847 A CN 104953847A
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Abstract
The invention discloses an isolated DC/DC (direct current/direct current) power supply module adopting an ultra-wide input range and ultra-low output voltage. The isolated DC/DC power supply module comprises an input booster circuit, an input and output isolating circuit and an output voltage step-down circuit. The power supply module adopts an integrated design by integrating three topological modes of the input booster circuit, the input and output isolating modular circuit and the output voltage step-down circuit, has the ultra-wide input range up to ten times, and can realize full-range 8V-80V input and output of ultra-low voltage of 0.6 V-4 V. The isolated DC/DC power supply module has the characteristics of small size, low cost, high efficiency, high reliability, good heat dissipation and wide application range; the same output function of a plurality of different input modules can be realized only through one power supply module adopting full-range input, and convenience is brought to enterprise standardization management.
Description
Technical field
The present invention relates to a kind of power module, specifically, relate to a kind of ultra-wide input range ultralow output voltage isolation DC/DC power module.
Background technology
At present, home and overseas standard isolated low pressure input DC/DC power module scope is divided into DC12V(9V ~ 18V), DC24V (18V ~ 36V) and DC48V (36V ~ 72V), the power module that 2 times of input ranges are wide, maximum input range width also only has 4 times, Width funtion input DC/DC converter product is more, especially has a large amount of application at key areas such as Aero-Space, armament systems, electronic warfare system, boats and ships.
Project planner selects during power module and selects variety classes and model power module according to input range, bring trouble to like this standardized management of enterprise, also a large amount of stocks can be brought to enterprise, the amount of circulating funds used, therefore the research and development realizing gamut input power module (8V ~ 80V) become a kind of trend in current low pressure input power module field, owing to being subject to the restriction of power module PWM chip duty ratio, realize a technical bottleneck and difficult point that gamut input becomes the design of low pressure input power module.
Summary of the invention
A kind of ultra-wide input range that the present invention designs to solve the problems of the technologies described above just ultralow output voltage isolation DC/DC power module.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of ultra-wide input range ultralow output voltage isolation DC/DC power module, comprises input booster circuit, input and output buffer circuit and output buck circuit.Input booster circuit is made up of switching tube Q1, energy storage inductor L1, electric capacity C1 and C2, diode D1, boost control chip PWM1 and feedback circuit 1, filter capacitor C1 is connected across between direct current input+Vin and-Vin, direct current input+Vin is connected with one end of energy storage inductor L1, direct current input-Vin is connected with the input of boost control chip PWM1, the other end and the switching tube Q1 of energy storage inductor L1 drain and to be connected with the positive pole of diode D1, switching tube Q1 grid is connected with the control output end of source electrode with boost control chip PWM1, the negative pole of diode D1 is connected with the elementary Same Name of Ends of transformer T with electric capacity C2 one end, the electric capacity C2 other end is connected with the input of control chip PWM2, feedback circuit 1 input is connected across the two ends of electric capacity C2, feedback circuit 1 output is connected with the control input end of boost control chip PWM1, input and output buffer circuit is made up of control chip PWM2, switching tube Q2, transformer T, diode D2, electric capacity C3, photoelectric coupling chip IC 1 and feedback and protective circuit, switching tube Q2 drain electrode is connected with the elementary different name end of transformer T, switching tube Q2 grid is connected with the control output end of source electrode with control chip PWM2, one end of transformer T level Same Name of Ends and electric capacity C3 and C4, diode D3 positive pole and direct current export-Vo and are connected, transformer T level different name end is connected with the positive pole of diode D2, the negative pole of diode D2 and the other end of electric capacity C3 drain with switching tube Q3 and are connected, feedback and protective circuit input are connected across the two ends of electric capacity C3, feedback and protective circuit output are connected with the control input end of control chip PWM2 by photoelectric coupling chip IC 1, output buck electric routing switch pipe Q3, energy storage inductor L2, electric capacity C4, diode D3, step-down control chip PWM3 and feedback circuit 2 form, input and transformer T level Same Name of Ends of step-down control chip PWM3 is connected, the control output end of step-down control chip PWM3 is connected with switching tube Q3 grid, the negative pole of diode D3 is connected with one end of energy storage inductor L2 with switching tube Q3 source electrode, the other end and the direct current of energy storage inductor L2 export+Vo and are connected, feedback circuit 2 input is connected across the two ends of electric capacity C4, and feedback circuit 2 output is connected with the control input end of step-down control chip PWM3.
Described a kind of ultra-wide input range ultralow output voltage isolation DC/DC power module, its boost control chip PWM1 is LM5022, control chip PWM2 is LM5022, step-down control chip PWM3 is LM2747.
Described a kind of ultra-wide input range ultralow output voltage isolation DC/DC power module, adopt integrated design, realize ultra-wide input range, input range is 8V ~ 80V; Realize ultralow pressure isolation and amplifier, output area is 0.6V ~ 4V.
Operation principle of the present invention:
Be divided into two stages to DC/DC power module internal power conversion buffer circuit input power supply input voltage by input booster circuit, the output voltage values of setting booster circuit feedback loop is DC20V, a stage is for when inputting DC8V ~ DC20V, by booster circuit work, input low voltage is boosted to stable DC20V, be the output voltage of booster circuit to internal power conversion buffer circuit input power supply, another stage is when being the DC20V when input voltage high voltage step-up circuit configuration, namely in booster circuit, feedback loop voltage signal high voltage step-up chip setting voltage time, boost chip does not work, control switch pipe Q1 does not work, according to theory diagram 1, input voltage is powered to the input of internal power conversion buffer circuit after the energy storage inductor and rectifier diode of booster circuit, the input voltage of power transformation buffer circuit maintains the scope of DC20V ~ DC80V substantially, by the operation principle of above-mentioned booster circuit, as long as the input range of power transfer buffer circuit is accomplished DC20V ~ DC80V, four times of input ranges, power output due to circuit product of the present invention is 10W, the topological mode of power transfer buffer circuit is single-ended reverse exciting circuit, it is wide that independent circuit of reversed excitation has input range, structure is simple, components and parts are less, the advantage that cost is low, input DC20V ~ DC80V scope of power module internal DC/DC power transfer buffer circuit can be realized.
Circuit of the present invention is inputted booster circuit, isolation module circuit, reduction voltage circuit three kinds of integrated designs of topological mode, and PWM1 control chip LM5022 control switch pipe Q1 in input booster circuit, realizes the function of input voltage boosting; PWM2 control chip LM5022 control switch pipe Q2 in circuit for power conversion, realizes constrained input isolation by transformer T, the conversion of power and voltage; In reduction voltage circuit, PWM3 control chip LM2747 control switch pipe Q3, is depressured to 0.6V ~ 4V by the output voltage 5V in circuit for power conversion, realizes the output of extra low voltage.
The present invention solves traditional home and overseas standard isolated low pressure input DC/DC power module scope and is divided into DC12V(9V ~ 18V), DC24V (18V ~ 36V) and DC48V (36V ~ 72V), the power module that 2 times of input ranges are wide, maximum input range width also only has 4 times, realizes a technical bottleneck and difficult point that gamut input becomes the design of low pressure input power module.
Feature of the present invention:
1, there is input gamut, extra low voltage output, high reliability, the advantage that cost is low, input voltage covers DC8-DC80V, and output voltage covers DC0.6V-DC4V(single channel), its volume is 50.8 × 50.8 × 12.7(unit: mm), peak power output is 20W, and peak efficiency is 85%.
2, power module is isolation method, and isolation voltage is not less than DC500V.
The invention has the beneficial effects as follows that there is input gamut, extra low voltage exports, high reliability, the advantage that cost is low, only need the power module of a gamut input just can realize the function of the identical output of module of multiple difference input, for the standardized management of enterprise brings convenience, also can reduce inventory requirements simultaneously, reduce purchase cost.
Accompanying drawing explanation
Fig. 1 is power module theory diagram of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described.
As shown in Figure 1, a kind of ultra-wide input range of the present invention ultralow output voltage isolation DC/DC power module, comprises input booster circuit, input and output buffer circuit and output buck circuit.Input booster circuit is made up of switching tube Q1, energy storage inductor L1, electric capacity C1 and C2, diode D1, boost control chip PWM1 and feedback circuit 1, filter capacitor C1 is connected across between direct current input+Vin and-Vin, direct current input+Vin is connected with one end of energy storage inductor L1, direct current input-Vin is connected with the input of boost control chip PWM1, the other end and the switching tube Q1 of energy storage inductor L1 drain and to be connected with the positive pole of diode D1, switching tube Q1 grid is connected with the control output end of source electrode with boost control chip PWM1, the negative pole of diode D1 is connected with the elementary Same Name of Ends of transformer T with electric capacity C2 one end, the electric capacity C2 other end is connected with the input of control chip PWM2, feedback circuit 1 input is connected across the two ends of electric capacity C2, feedback circuit 1 output is connected with the control input end of boost control chip PWM1, input and output buffer circuit is made up of control chip PWM2, switching tube Q2, transformer T, diode D2, electric capacity C3, photoelectric coupling chip IC 1 and feedback and protective circuit, switching tube Q2 drain electrode is connected with the elementary different name end of transformer T, switching tube Q2 grid is connected with the control output end of source electrode with control chip PWM2, one end of transformer T level Same Name of Ends and electric capacity C3 and C4, diode D3 positive pole and direct current export-Vo and are connected, transformer T level different name end is connected with the positive pole of diode D2, the negative pole of diode D2 and the other end of electric capacity C3 drain with switching tube Q3 and are connected, feedback and protective circuit input are connected across the two ends of electric capacity C3, feedback and protective circuit output are connected with the control input end of control chip PWM2 by photoelectric coupling chip IC 1, output buck electric routing switch pipe Q3, energy storage inductor L2, electric capacity C4, diode D3, step-down control chip PWM3 and feedback circuit 2 form, input and transformer T level Same Name of Ends of step-down control chip PWM3 is connected, the control output end of step-down control chip PWM3 is connected with switching tube Q3 grid, the negative pole of diode D3 is connected with one end of energy storage inductor L2 with switching tube Q3 source electrode, the other end and the direct current of energy storage inductor L2 export+Vo and are connected, feedback circuit 2 input is connected across the two ends of electric capacity C4, and feedback circuit 2 output is connected with the control input end of step-down control chip PWM3.
Described a kind of ultra-wide input range ultralow output voltage isolation DC/DC power module, its boost control chip PWM1 is LM5022, control chip PWM2 is LM5022, step-down control chip PWM3 is LM2747.
Described a kind of ultra-wide input range ultralow output voltage isolation DC/DC power module, adopt integrated design, realize ultra-wide input range, input range is 8V ~ 80V; Realize ultralow pressure isolation and amplifier, output area is 0.6V ~ 4V.
The present invention is not limited to above-mentioned preferred forms, anyone other any or akin products identical with the present invention drawn under enlightenment of the present invention, all drops within protection scope of the present invention.
Claims (3)
1. a ultra-wide input range ultralow output voltage isolation DC/DC power module, comprises input booster circuit, input and output buffer circuit and output buck circuit, it is characterized in that: input booster circuit is made up of switching tube Q1, energy storage inductor L1, electric capacity C1 and C2, diode D1, boost control chip PWM1 and feedback circuit 1, filter capacitor C1 is connected across between direct current input+Vin and-Vin, direct current input+Vin is connected with one end of energy storage inductor L1, direct current input-Vin is connected with the input of boost control chip PWM1, the other end and the switching tube Q1 of energy storage inductor L1 drain and to be connected with the positive pole of diode D1, switching tube Q1 grid is connected with the control output end of source electrode with boost control chip PWM1, the negative pole of diode D1 is connected with the elementary Same Name of Ends of transformer T with electric capacity C2 one end, the electric capacity C2 other end is connected with the input of control chip PWM2, feedback circuit 1 input is connected across the two ends of electric capacity C2, feedback circuit 1 output is connected with the control input end of boost control chip PWM1, input and output buffer circuit is made up of control chip PWM2, switching tube Q2, transformer T, diode D2, electric capacity C3, photoelectric coupling chip IC 1 and feedback and protective circuit, switching tube Q2 drain electrode is connected with the elementary different name end of transformer T, switching tube Q2 grid is connected with the control output end of source electrode with control chip PWM2, one end of transformer T level Same Name of Ends and electric capacity C3 and C4, diode D3 positive pole and direct current export-Vo and are connected, transformer T level different name end is connected with the positive pole of diode D2, the negative pole of diode D2 and the other end of electric capacity C3 drain with switching tube Q3 and are connected, feedback and protective circuit input are connected across the two ends of electric capacity C3, feedback and protective circuit output are connected with the control input end of control chip PWM2 by photoelectric coupling chip IC 1, output buck electric routing switch pipe Q3, energy storage inductor L2, electric capacity C4, diode D3, step-down control chip PWM3 and feedback circuit 2 form, input and transformer T level Same Name of Ends of step-down control chip PWM3 is connected, the control output end of step-down control chip PWM3 is connected with switching tube Q3 grid, the negative pole of diode D3 is connected with one end of energy storage inductor L2 with switching tube Q3 source electrode, the other end and the direct current of energy storage inductor L2 export+Vo and are connected, feedback circuit 2 input is connected across the two ends of electric capacity C4, and feedback circuit 2 output is connected with the control input end of step-down control chip PWM3.
2. a kind of ultra-wide input range according to claim 1 ultralow output voltage isolation DC/DC power module, is characterized in that: boost control chip PWM1 is LM5022, control chip PWM2 is LM5022, step-down control chip PWM3 is LM2747.
3. a kind of ultra-wide input range according to claim 1 ultralow output voltage isolation DC/DC power module, it is characterized in that: power module adopts integrated design, realize ultra-wide input range, input range is 8V ~ 80V; Realize ultralow pressure isolation and amplifier, output area is 0.6V ~ 4V.
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| CN201510367729.7A CN104953847A (en) | 2015-06-29 | 2015-06-29 | Isolated DC/DC (direct current/direct current) power supply module adopting ultra-wide input range and ultra-low output voltage |
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| CN201510367729.7A CN104953847A (en) | 2015-06-29 | 2015-06-29 | Isolated DC/DC (direct current/direct current) power supply module adopting ultra-wide input range and ultra-low output voltage |
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| CN107786088A (en) * | 2016-08-29 | 2018-03-09 | 中兴通讯股份有限公司 | Power circuit, power supply circuit control method and storage medium |
| CN109104082A (en) * | 2018-10-16 | 2018-12-28 | 西安霍威电源有限公司 | A kind of negative voltage out-put supply high voltage adjustable detector power supply on a large scale |
| CN113394994A (en) * | 2020-03-12 | 2021-09-14 | Oppo广东移动通信有限公司 | Power supply conversion circuit and charging equipment |
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| CN113394994A (en) * | 2020-03-12 | 2021-09-14 | Oppo广东移动通信有限公司 | Power supply conversion circuit and charging equipment |
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