CN204205954U - Inverse-excitation type isolation DC-DC power source - Google Patents
Inverse-excitation type isolation DC-DC power source Download PDFInfo
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- CN204205954U CN204205954U CN201420433940.5U CN201420433940U CN204205954U CN 204205954 U CN204205954 U CN 204205954U CN 201420433940 U CN201420433940 U CN 201420433940U CN 204205954 U CN204205954 U CN 204205954U
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Abstract
The utility model relates to a kind of inverse-excitation type isolation DC-DC power source, comprising signal input part, Surge suppression and filter circuit, input voltage detection circuit, high frequency transformer, output voltage detecting circuit, over-current detection circuit, current rectifying and wave filtering circuit, feedback circuit and integrated power supply control chip, described inverse-excitation type isolation DC-DC power source is encouraged designed by topological project based on the integrated switched power-supply controller of electric flyback of PowerIntegrations DPA series.Inverse-excitation type isolation DC-DC power source of the present utility model; the defencive function of the integrated switched power-supply controller of electric of application DPA series, can realize the defencive functions such as elementary overvoltage, under-voltage, overcurrent, short circuit, can simplify Power Management Design in conjunction with peripheral circuit; reduce peripheral components quantity; shorten the construction cycle, improve power supply reliability, working stability; replace easily; coordinate efficient heat radiating metal shell simultaneously, realize the inverse-excitation type isolation DC-DC power source of small size high reliability, have wide range of applications.
Description
Technical field
The utility model relates to electronic technology field, particularly relates to Switching Power Supply, specifically refers to a kind of inverse-excitation type isolation DC-DC power source.
Background technology
In order to reduce the impact of severe electromagnetic environment on system around in commercial Application, peripheral interface circuit and internal control circuit being isolated, needing to provide insulating power supply.Also there is requirement to provide multipath isolated power in Electromechanical Control simultaneously.Being applied in of requiring to isolate, Normal practice has two kinds:
(1) with discrete device design isolated power supply;
(2) isolation module power supply is adopted.
Adopt discrete device design isolated power supply, design is complicated, takes up room large, and be difficult to after fault safeguard, circuit is difficult to multiplexing, and maintenance cost is high.And isolation module power supply is changed easily, take volume little, working stability, have each power grade available, replace easily, isolation module power supply of the prior art, complex structure, peripheral components quantity is many, and the construction cycle is long.
Utility model content
The purpose of this utility model is the shortcoming overcoming above-mentioned prior art, provides and a kind ofly can realize simplifying Power Management Design, reduces peripheral components quantity, shortens the construction cycle, improves power supply reliability, the high and inverse-excitation type that volume the is little isolation DC-DC power source of radiating efficiency.
To achieve these goals, inverse-excitation type isolation DC-DC power source of the present utility model has following formation:
This inverse-excitation type isolation DC-DC power source, its main feature is, described power supply comprises signal input part, described signal input part is connected with the input of Surge suppression and filter circuit, described Surge suppression and the output of filter circuit are connected with the former limit of high frequency transformer, described Surge suppression and the output of filter circuit are connected with the input of input voltage detection circuit, the secondary of described high frequency transformer is connected with the input of current rectifying and wave filtering circuit, the output of described current rectifying and wave filtering circuit is connected with signal output part, the output of described current rectifying and wave filtering circuit is connected with the input of output voltage detecting circuit, the output of described current rectifying and wave filtering circuit is connected with the input of feedback circuit, the output of described input voltage detection circuit is connected with integrated power supply control chip, the output of described output voltage detecting circuit is connected with integrated power supply control chip, the output of described feedback circuit is connected with integrated power supply control chip, described input voltage detection circuit comprises input voltage over-voltage detection circuit, over-current detection circuit and input voltage undervoltage detection circuit, described output voltage detecting circuit comprises output voltage over-voltage detection circuit and output voltage short-circuit detecting circuit.
Further, described Surge suppression and filter circuit comprise the first electric capacity C1, resistance R1, first diode D1, and the second diode D2, the first end of the first described electric capacity C1, the first end of resistance R1, the normal phase input end of the first diode D1, and the different name end on the former limit of described high frequency transformer is connected, second end of the first described electric capacity C1, second end of resistance R1, the inverting input of the first diode D1, and the inverting input of the second described diode D2 is connected, the positive input of the second described diode D2 is connected with the Same Name of Ends on the former limit of described high frequency transformer.
Further, described current rectifying and wave filtering circuit comprises the 3rd diode D2 and the second electric capacity C2, the normal phase input end of the 3rd described diode D2 is connected with the Same Name of Ends of described high frequency transformer secondary, inverting input is connected with the first end of the second described electric capacity C2, second end of the second described electric capacity C2 is connected to the ground and connects, and the different name end of described high frequency transformer secondary is connected to the ground and connects.
Further, the voltage that the signal output part of described power supply exports is DC15V ~ DC36V.
Further, described high frequency transformer is the SMD high frequency transformer of compact or plane formula high frequency transformer, and described integrated power supply control chip is PWM chip.
Further, described power supply also comprises a heat radiating metal shell, and described Surge suppression and filter circuit, high frequency transformer, input voltage detection circuit, current rectifying and wave filtering circuit, output voltage detecting circuit, feedback circuit and integrated power supply control chip are fixed in described heat radiating metal shell.
Further, described heat radiating metal shell is the heat radiating metal shell of sealing.
Have employed the inverse-excitation type isolation DC-DC power source in the utility model, compared with prior art, there is following beneficial effect:
Inverse-excitation type isolation DC-DC power source of the present utility model adopts the integrated switched power-supply controller of electric flyback of PowerIntegrations DPA series to encourage topological project, simplifies Power Management Design, reduces peripheral components quantity, shorten the construction cycle, improve power supply reliability; Inverse-excitation type isolation DC-DC power source of the present utility model is provided with heat radiating metal shell, realizes the isolation module power supply of small size high reliability; Inverse-excitation type of the present utility model isolation DC-DC power source, the defencive function of application DPA controller, can realize the defencive functions such as elementary overvoltage, under-voltage, overcurrent, short circuit, have wide range of applications in conjunction with peripheral circuit.
Accompanying drawing explanation
Fig. 1 is the modular structure schematic diagram of inverse-excitation type of the present utility model isolation DC-DC power source.
Fig. 2 is the circuit theory diagrams of inverse-excitation type of the present utility model isolation DC-DC power source.
Fig. 3 is the heat radiating metal shell mechanism schematic diagram of inverse-excitation type of the present utility model isolation DC-DC power source.
Fig. 4 is the electrical block diagram of second specific embodiment of inverse-excitation type of the present utility model isolation DC-DC power source.
Embodiment
In order to more clearly describe technology contents of the present utility model, conduct further description below in conjunction with specific embodiment.
Refer to shown in Fig. 1, the utility model inverse-excitation type isolation DC-DC power source comprises signal input part, described signal input part is connected with the input of Surge suppression and filter circuit, described Surge suppression and the output of filter circuit are connected with the former limit of high frequency transformer, described Surge suppression and the output of filter circuit are connected with the input of input voltage detection circuit, the secondary of described high frequency transformer is connected with the input of current rectifying and wave filtering circuit, the output of described current rectifying and wave filtering circuit is connected with signal output part, the output of described current rectifying and wave filtering circuit is connected with the input of output voltage detecting circuit, the output of described current rectifying and wave filtering circuit is connected with the input of feedback circuit, the output of described input voltage detection circuit is connected with integrated power supply control chip, the output of described output voltage detecting circuit is connected with integrated power supply control chip, the output of described feedback circuit is connected with integrated power supply control chip, described input voltage detection circuit comprises input voltage over-voltage detection circuit, over-current detection circuit and input voltage undervoltage detection circuit, described output voltage detecting circuit comprises output voltage over-voltage detection circuit and output voltage short-circuit detecting circuit.
Refer to shown in Fig. 2, first embodiment for the utility model inverse-excitation type isolation DC-DC power source:
Described Surge suppression and filter circuit comprise the first electric capacity C1, resistance R1, first diode D1, and the second diode D2, the first end of the first described electric capacity C1, the first end of resistance R1, the normal phase input end of the first diode D1, and the different name end on the former limit of described high frequency transformer is connected, second end of the first described electric capacity C1, second end of resistance R1, the inverting input of the first diode D1, and the inverting input of the second described diode D2 is connected, the positive input of the second described diode D2 is connected with the Same Name of Ends on the former limit of described high frequency transformer.
Described signal input part is connected with the first end of the first described electric capacity C1.
Described current rectifying and wave filtering circuit comprises the 3rd diode D2 and the second electric capacity C2, the normal phase input end of the 3rd described diode D2 is connected with the Same Name of Ends of described high frequency transformer secondary, inverting input is connected with the first end of the second described electric capacity C2, second end of the second described electric capacity C2 is connected to the ground and connects, and the different name end of described high frequency transformer secondary is connected to the ground and connects.
Described integrated power supply control chip is PWM chip.
The input of described feedback circuit is connected with the inverting input of the 3rd described triode D3, and the output of described feedback circuit is connected with PWM chip.
The drain electrode of the first metal-oxide-semiconductor Q1 is connected with the normal phase input end of the second described diode, and grid is connected with described PWM chip, and source electrode is connected to the ground and connects.
The operation principle of this embodiment is:
When first metal-oxide-semiconductor Q1 opens, power supply is by high frequency transformer, and the first metal-oxide-semiconductor Q1 discharges, high frequency transformer former limit storage power, in secondary circuit, the 3rd diode D3 bears reverse voltage cut-off, and the leakage inductance energy being simultaneously stored in the first electric capacity C1 is discharged by resistance R1.
When first metal-oxide-semiconductor turns off, the energy that high frequency transformer stores charges to the first electric capacity C1 by the second diode D2, first electric capacity C1 voltage raises until the second diode D2 ends, and the energy being simultaneously stored in high frequency transformer is charged to the second electric capacity C2 by the 3rd diode D3.
Use the voltage detecting in DAP integrated switch power controller and current-limiting function can realize the functions such as line under-voltage protection, overvoltage protection, overcurrent protection, secondary latch shutoff.
The voltage that the signal output part of described power supply exports is DC15V ~ DC36V.
Described high frequency transformer is the SMD high frequency transformer of compact or plane formula high frequency transformer.
Refer to shown in Fig. 3, described power supply also comprises a heat radiating metal shell, and described Surge suppression and filter circuit, high frequency transformer, input voltage detection circuit, current rectifying and wave filtering circuit, output voltage detecting circuit, feedback circuit and integrated power supply control chip are fixed in described heat radiating metal shell.
Described heat radiating metal shell is the heat radiating metal shell of sealing, and power device is dispelled the heat by heat radiating metal shell, inner with the sealing of heat conduction casting glue, improves antidetonation, waterproof and dustproof performance.
Referring to shown in Fig. 4, is the electrical block diagram of the present invention second specific embodiment.
Wherein, signal input part is connected with surge treatment circuit; wherein C4 is for restarting electric capacity; R5 is overvoltage, under-voltage inspection resistance, R2 are current-limiting resistance; integrated power supply controller comprises L pin, D pin, C pin, F pin, X pin, S pin; this circuit working is at voltage mode control; integrated power supply controller L pin can detect the electric current flowing into pin; when electric current is greater than certain determined value; integrated circuit controller will be closed, and utilize this pin function can realize input undervoltage, overvoltage protection and output voltage over-voltage protecting function.Can realize allowing electric current to programme to integrated circuit controller by X pin and reach the object of output overcurrent protection.After function of power protection starts, integrated circuit controller can detect restarts electric capacity C4 terminal voltage, carries out restarting operation after voltage is less than particular value again.
Inverse-excitation type isolation DC-DC power source of the present utility model adopts PI Switching Power Supply Autocad PIXls Designer to carry out parameter adjustment, high frequency transformer parameter can be determined fast, give also the integrated power supply control chip model and reference high frequency transformer processing technology drawing that meet the demands simultaneously.
According to high frequency transformer parameter and selected integrated power supply control chip; carrying out inputting, export, clamp members selects; the measure voltage & current pin making full use of DPA, to realize various defencive function, has input undervoltage protection, input overvoltage protection, output overvoltage shutoff, overcurrent protection, short-circuit protection, secondary latch shutoff and autoboot and moves function.
Have employed the inverse-excitation type isolation DC-DC power source in the utility model, compared with prior art, there is following beneficial effect:
Inverse-excitation type isolation DC-DC power source of the present utility model adopts the integrated switched power-supply controller of electric flyback of PowerIntegrations DPA series to encourage topological project, simplifies Power Management Design, reduces peripheral components quantity, shorten the construction cycle, improve power supply reliability; Inverse-excitation type isolation DC-DC power source of the present utility model is provided with heat radiating metal shell, realizes the isolation module power supply of small size high reliability; Inverse-excitation type of the present utility model isolation DC-DC power source, the defencive function of application DPA controller, can realize the defencive functions such as elementary overvoltage, under-voltage, overcurrent, short circuit, have wide range of applications in conjunction with peripheral circuit.
Above-described embodiment is this patent preferred embodiment; not be used for limiting practical range of the present utility model; those skilled in the art is under the prerequisite not departing from the utility model principle; the improvement done, change, combination, substitute etc., all belong within the utility model claim scope required for protection.
In this description, the utility model is described with reference to its specific embodiment.But, still can make various amendment and conversion obviously and not deviate from spirit and scope of the present utility model.Therefore, specification and accompanying drawing are regarded in an illustrative, rather than a restrictive.
Claims (7)
1. an inverse-excitation type isolation DC-DC power source, it is characterized in that, described power supply comprises signal input part, described signal input part is connected with the input of Surge suppression and filter circuit, described Surge suppression and the output of filter circuit are connected with the former limit of high frequency transformer, described Surge suppression and the output of filter circuit are connected with the input of input voltage detection circuit, the secondary of described high frequency transformer is connected with the input of current rectifying and wave filtering circuit, the output of described current rectifying and wave filtering circuit is connected with signal output part, the output of described current rectifying and wave filtering circuit is connected with the input of output voltage detecting circuit, the output of described current rectifying and wave filtering circuit is connected with the input of feedback circuit, the output of described input voltage detection circuit is connected with integrated power supply control chip, the output of described output voltage detecting circuit is connected with integrated power supply control chip, the output of described feedback circuit is connected with integrated power supply control chip, described input voltage detection circuit comprises input voltage over-voltage detection circuit, over-current detection circuit and input voltage undervoltage detection circuit, described output voltage detecting circuit comprises output voltage over-voltage detection circuit and output voltage short-circuit detecting circuit.
2. inverse-excitation type isolation DC-DC power source according to claim 1, it is characterized in that, described Surge suppression and filter circuit comprise the first electric capacity (C1), resistance (R1), first diode (D1), and second diode (D2), the first end of described the first electric capacity (C1), the first end of resistance (R1), the normal phase input end of the first diode (D1), and the different name end on the former limit of described high frequency transformer is connected, second end of described the first electric capacity (C1), second end of resistance (R1), the inverting input of the first diode (D1), and the inverting input of described the second diode (D2) is connected, the positive input of described the second diode (D2) is connected with the Same Name of Ends on the former limit of described high frequency transformer.
3. inverse-excitation type isolation DC-DC power source according to claim 1, it is characterized in that, described current rectifying and wave filtering circuit comprises the 3rd diode (D2) and the second electric capacity (C2), the normal phase input end of the 3rd described diode (D2) is connected with the Same Name of Ends of described high frequency transformer secondary, inverting input is connected with the first end of described the second electric capacity (C2), second end of described the second electric capacity (C2) is connected to the ground and connects, and the different name end of described high frequency transformer secondary is connected to the ground and connects.
4. inverse-excitation type isolation DC-DC power source according to claim 1, is characterized in that, the voltage that the signal output part of described power supply exports is DC15V ~ DC36V.
5. inverse-excitation type isolation DC-DC power source according to claim 1, it is characterized in that, described high frequency transformer is the SMD high frequency transformer of compact or plane formula high frequency transformer, and described integrated power supply control chip is PWM chip.
6. inverse-excitation type isolation DC-DC power source according to claim 1, it is characterized in that, described power supply also comprises a heat radiating metal shell, and described Surge suppression and filter circuit, high frequency transformer, input voltage detection circuit, current rectifying and wave filtering circuit, output voltage detecting circuit, feedback circuit and integrated power supply control chip are fixed in described heat radiating metal shell.
7. inverse-excitation type isolation DC-DC power source according to claim 6, it is characterized in that, described heat radiating metal shell is the heat radiating metal shell of sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420433940.5U CN204205954U (en) | 2014-08-01 | 2014-08-01 | Inverse-excitation type isolation DC-DC power source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420433940.5U CN204205954U (en) | 2014-08-01 | 2014-08-01 | Inverse-excitation type isolation DC-DC power source |
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| Publication Number | Publication Date |
|---|---|
| CN204205954U true CN204205954U (en) | 2015-03-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420433940.5U Expired - Fee Related CN204205954U (en) | 2014-08-01 | 2014-08-01 | Inverse-excitation type isolation DC-DC power source |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104734518A (en) * | 2015-04-01 | 2015-06-24 | 中国石油集团渤海钻探工程有限公司 | Switching power supply circuit for intelligent drilling tool |
| CN107465352A (en) * | 2017-09-11 | 2017-12-12 | 沈阳铁路信号有限责任公司 | Five tunnels export microcomputer monitoring Switching Power Supply |
| CN112510982A (en) * | 2020-12-14 | 2021-03-16 | 深圳市有方科技股份有限公司 | Power protection circuit and power protection system |
-
2014
- 2014-08-01 CN CN201420433940.5U patent/CN204205954U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104734518A (en) * | 2015-04-01 | 2015-06-24 | 中国石油集团渤海钻探工程有限公司 | Switching power supply circuit for intelligent drilling tool |
| CN107465352A (en) * | 2017-09-11 | 2017-12-12 | 沈阳铁路信号有限责任公司 | Five tunnels export microcomputer monitoring Switching Power Supply |
| CN112510982A (en) * | 2020-12-14 | 2021-03-16 | 深圳市有方科技股份有限公司 | Power protection circuit and power protection system |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150311 Termination date: 20200801 |
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| CF01 | Termination of patent right due to non-payment of annual fee |