CN203014691U - power circuit capable of converting AC to DC - Google Patents
power circuit capable of converting AC to DC Download PDFInfo
- Publication number
- CN203014691U CN203014691U CN 201220731241 CN201220731241U CN203014691U CN 203014691 U CN203014691 U CN 203014691U CN 201220731241 CN201220731241 CN 201220731241 CN 201220731241 U CN201220731241 U CN 201220731241U CN 203014691 U CN203014691 U CN 203014691U
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Abstract
The utility model relates to the field of electronics and provides a power circuit capable of converting AC to DC. The power circuit is simple in structure, low in cost and safe and stable in power conversion, and comprises an alternating current voltage input interface, an overvoltage protective circuit, a first AC/DC converter U100, a second AC/DC converter U101, a filtering voltage stabilizing circuit and a direct current voltage output interface. The alternating current voltage input interface is connected with L and N pins of the first AC/DC converter U100 and L and N pins of the second AC/DC converter U101 through overvoltage protective circuit outputs respectively. Direct current voltages output by the first AC/DC converter U100 and the second AC/DC converter U101 are subjected to filtering and voltage stabilizing by the filtering voltage stabilizing circuit and then are output through the direct current voltage output interface.
Description
Technical field
The utility model relates to electronic applications, and particularly a kind of AC turns the DC power circuit.
Background technology
Often the 220V alternating current need to be converted into low-voltage dc voltage for the external circuit of chip or chip in Application of integrated circuit, and existing conversion regime is: 1, adopt the Industrial Frequency Transformer step-down, realize lowering and stabilizing blood pressure by special linear voltage stabilization chip after rectification, but the high cost of the Industrial Frequency Transformer that this mode is used and linear voltage stabilization chip, volume is excessive; 2, adopt switching power source chip to realize lowering and stabilizing blood pressure, as the VIPER chip, but the peripheral circuit of the switching power source chip that this mode is used is complicated, realizes that difficulty is high; 3, the control circuit and the resistance-capacitance coupling rectification circuit that use voltage judge module, overvoltage protective module, switching device and power resistor to form are realized step-down and overvoltage protection; by overvoltage protective module output high-low level control switch device break-make; the power consumption of voltage-stabiliser tube is transferred on external power consumption resistance; reduce the chip caloric value; but the switching device that this mode is used cause power-supply ripple greatly, extremely unstable, be unfavorable for the application of chip.
Summary of the invention
Therefore, for above-mentioned problem, the utility model proposes a kind of AC simple in structure, with low cost, power supply conversion safety and stability and turn the DC power circuit.
for solving this technical problem, the utility model is taked following scheme: a kind of AC turns the DC power circuit, comprise the alternating voltage input interface, overvoltage crowbar, the one AC/DC converter U100, the 2nd AC/DC converter U101, filter regulator circuit and direct voltage output interface, described alternating voltage input interface through overvoltage crowbar output respectively with the L of an AC/DC converter U100, the L of two pins of N and the 2nd AC/DC converter U101, two pins of N are connected, the direct voltage of a described AC/DC converter U100 and the 2nd AC/DC converter U101 output is through filter regulator circuit filtering, after voltage stabilizing by direct voltage output interface output dc voltage.
Further, a described AC/DC converter U100 is that LD0310B05 converter, described the 2nd AC/DC converter U101 are the LD05-20B05 converter.
Further; described overvoltage crowbar comprises fuse F100, thermistor R1 and piezo-resistance R2; the L pin output of described alternating voltage input interface is connected with thermistor R1 one end through fuse F100; the described thermistor R1 other end connects piezo-resistance R2 one end, the L pin of an AC/DC converter U100 and the L pin of the 2nd AC/DC converter U101, and the described piezo-resistance R2 other end connects N pin, the N pin of an AC/DC converter U100 and the N pin of the 2nd AC/DC converter U101 of alternating voltage input interface.
Further, described filter regulator circuit comprises filter capacitor C1, C2, C3 and transient voltage twin zener dioder D100, described filter capacitor C1, C2, transient voltage twin zener dioder D100 and filter capacitor C3 are connected in parallel in respectively the output dc voltage positive and negative electrode two ends of an AC/DC converter U100 successively, and the output dc voltage of a described AC/DC converter U100 is anodal to be connected with the output dc voltage positive pole of the 2nd AC/DC converter U101.
By adopting the aforementioned techniques scheme, the beneficial effects of the utility model are: realize that by adopting cheap LD0310B05 converter and LD05-20B05 converter and simple peripheral circuit AC turns the DC power conversion, make advantages such as the utlity model has simple in structure, with low cost, power supply conversion safety and stability, can vastly be applicable.
Description of drawings
Fig. 1 is the circuit diagram of the utility model embodiment.
Embodiment
Now with embodiment, the utility model is further illustrated by reference to the accompanying drawings.
with reference to figure 1, preferred a kind of AC of the present utility model turns the DC power circuit, comprise alternating voltage input interface J100, overvoltage crowbar 1, the one AC/DC converter U100, the 2nd AC/DC converter U101, filter regulator circuit 2 and direct voltage output interface J101, described alternating voltage input interface J100 through overvoltage crowbar 1 output respectively with the L of an AC/DC converter U100, the L of two pins of N and the 2nd AC/DC converter U101, two pins of N are connected, the direct voltage of a described AC/DC converter U100 and the 2nd AC/DC converter U101 output is through filter regulator circuit 2 filtering, after voltage stabilizing by direct voltage output interface J101 output dc voltage, a described AC/DC converter U100 is the LD0310B05 converter, described the 2nd AC/DC converter U101 is the LD05-20B05 converter, described overvoltage crowbar 1 comprises fuse F100, thermistor R1 and piezo-resistance R2, described thermistor R1 is used for preventing that overcurrent from impacting, described piezo-resistance R2 is used for the upper voltage of clamper, the shock resistance protection, the L pin output of described alternating voltage input interface J100 is connected with thermistor R1 one end through fuse F100, the described thermistor R1 other end connects piezo-resistance R2 one end, the L pin of the L pin of the one AC/DC converter U100 and the 2nd AC/DC converter U101, the described piezo-resistance R2 other end connects the N pin of alternating voltage input interface J100, the N pin of the N pin of the one AC/DC converter U100 and the 2nd AC/DC converter U101, described filter regulator circuit 2 comprises filter capacitor C1, C2, C3 and transient voltage twin zener dioder D100, described transient voltage twin zener dioder D100 is used for preventing reverse breakdown voltage and reverse breakdown current, described filter capacitor C1, C2, transient voltage twin zener dioder D100 and filter capacitor C3 are connected in parallel in respectively the output DC positive pressure of an AC/DC converter U100 successively, the negative pole two ends, the output dc voltage of a described AC/DC converter U100 is anodal to be connected with the output dc voltage positive pole of the 2nd AC/DC converter U101.
The utility model is by adopting cheap LD0310B05 converter and LD05-20B05 converter and simple peripheral circuit to realize that AC turns the DC power conversion, make advantages such as the utlity model has simple in structure, with low cost, power supply conversion safety and stability, can vastly be applicable.
Although specifically show and introduced the utility model in conjunction with preferred embodiment; but the those skilled in the art should be understood that; within not breaking away from the spirit and scope of the present utility model that appended claims limits; can make a variety of changes the utility model in the form and details, be protection range of the present utility model.
Claims (4)
1. an AC turns the DC power circuit, comprise the alternating voltage input interface, overvoltage crowbar, the one AC/DC converter U100, the 2nd AC/DC converter U101, filter regulator circuit and direct voltage output interface, it is characterized in that: described alternating voltage input interface through overvoltage crowbar output respectively with the L of an AC/DC converter U100, the L of two pins of N and the 2nd AC/DC converter U101, two pins of N are connected, the direct voltage of a described AC/DC converter U100 and the 2nd AC/DC converter U101 output is through filter regulator circuit filtering, after voltage stabilizing by direct voltage output interface output dc voltage.
2. AC according to claim 1 turns the DC power circuit, it is characterized in that: a described AC/DC converter U100 is that LD0310B05 converter, described the 2nd AC/DC converter U101 are the LD05-20B05 converter.
3. AC according to claim 1 turns the DC power circuit, it is characterized in that: described overvoltage crowbar comprises fuse F100, thermistor R1 and piezo-resistance R2, the L pin output of described alternating voltage input interface is connected with thermistor R1 one end through fuse F100, the described thermistor R1 other end connects piezo-resistance R2 one end, the L pin of the L pin of the one AC/DC converter U100 and the 2nd AC/DC converter U101, the described piezo-resistance R2 other end connects the N pin of alternating voltage input interface, the N pin of the N pin of the one AC/DC converter U100 and the 2nd AC/DC converter U101.
4. AC according to claim 1 turns the DC power circuit, it is characterized in that: described filter regulator circuit comprises filter capacitor C1, C2, C3 and transient voltage twin zener dioder D100, described filter capacitor C1, C2, transient voltage twin zener dioder D100 and filter capacitor C3 are connected in parallel in respectively the output dc voltage positive and negative electrode two ends of an AC/DC converter U100 successively, and the output dc voltage of a described AC/DC converter U100 is anodal to be connected with the output dc voltage positive pole of the 2nd AC/DC converter U101.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220731241 CN203014691U (en) | 2012-12-26 | 2012-12-26 | power circuit capable of converting AC to DC |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220731241 CN203014691U (en) | 2012-12-26 | 2012-12-26 | power circuit capable of converting AC to DC |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203014691U true CN203014691U (en) | 2013-06-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220731241 Expired - Fee Related CN203014691U (en) | 2012-12-26 | 2012-12-26 | power circuit capable of converting AC to DC |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203014691U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104135160A (en) * | 2014-07-24 | 2014-11-05 | 江阴长仪集团有限公司 | Self-isolation 485 power supply circuit for intelligent electric energy meter |
| CN104320007A (en) * | 2014-10-29 | 2015-01-28 | 成都汉康信息产业有限公司 | Power supply circuit of remote terminal unit |
| CN104319754A (en) * | 2014-10-29 | 2015-01-28 | 成都汉康信息产业有限公司 | Overvoltage protective type encryption remote measuring terminal |
| CN104868707A (en) * | 2014-01-15 | 2015-08-26 | 天津豪雅科技发展有限公司 | Elevator band-type brake power supply device |
| CN105470921A (en) * | 2015-12-16 | 2016-04-06 | 深圳市元征软件开发有限公司 | Power protection circuit and vehicle-mounted electronic device |
| WO2022100225A1 (en) * | 2020-11-12 | 2022-05-19 | 华为数字能源技术有限公司 | Power converter, and protection method and system |
-
2012
- 2012-12-26 CN CN 201220731241 patent/CN203014691U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104868707A (en) * | 2014-01-15 | 2015-08-26 | 天津豪雅科技发展有限公司 | Elevator band-type brake power supply device |
| CN104135160A (en) * | 2014-07-24 | 2014-11-05 | 江阴长仪集团有限公司 | Self-isolation 485 power supply circuit for intelligent electric energy meter |
| CN104320007A (en) * | 2014-10-29 | 2015-01-28 | 成都汉康信息产业有限公司 | Power supply circuit of remote terminal unit |
| CN104319754A (en) * | 2014-10-29 | 2015-01-28 | 成都汉康信息产业有限公司 | Overvoltage protective type encryption remote measuring terminal |
| CN105470921A (en) * | 2015-12-16 | 2016-04-06 | 深圳市元征软件开发有限公司 | Power protection circuit and vehicle-mounted electronic device |
| CN105470921B (en) * | 2015-12-16 | 2018-10-23 | 深圳市元征软件开发有限公司 | Power protecting circuit and vehicle electronic device |
| WO2022100225A1 (en) * | 2020-11-12 | 2022-05-19 | 华为数字能源技术有限公司 | Power converter, and protection method and system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20130619 Termination date: 20151226 |
|
| EXPY | Termination of patent right or utility model |