CN202696489U - 5 V stabilized voltage supply with protection function - Google Patents
5 V stabilized voltage supply with protection function Download PDFInfo
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- CN202696489U CN202696489U CN 201220264108 CN201220264108U CN202696489U CN 202696489 U CN202696489 U CN 202696489U CN 201220264108 CN201220264108 CN 201220264108 CN 201220264108 U CN201220264108 U CN 201220264108U CN 202696489 U CN202696489 U CN 202696489U
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Abstract
The utility model discloses a 5 V stabilized voltage supply with a protection function. The 5 V stabilized voltage supply comprises a transformer, a switch, a fuse, a rectification circuit, a bidirectional silicon-controlled rectifier, a three-terminal voltage stabilizer, a first diode, a second diode, a voltage stabilizing tube, a light-emitting diode, first to eighth capacitors, and first to fourth resistors. When the 5 V stabilized voltage supply normally works, the output voltage is 5 V, and the bidirectional silicon-controlled rectifier is in a cutoff state. When the output voltage exceeds a limit value due to some reason, the voltage stabilizing tube is broken down; thus, the voltage on a third resistor rises to trigger the bidirectional silicon-controlled rectifier in a conducting state; and the fuse is caused to be fused, so that a load is protected. The stabilized voltage supply with the protection function, which is provided by the utility model, adopts a collector output series type voltage stabilization way, has the characteristics of low cost, high efficiency, small size, light weight, less ripples, high stability and the like, and is also provided with a current expansion and excess voltage protection device.
Description
Technical field
The utility model relates to a kind of low-voltage regulated power supply, relates in particular to a kind of 5V stabilized voltage power supply with defencive function.
Background technology
The extensive use in many low-voltage electrical appliances of existing low-voltage regulated power supply, but existing low-voltage regulated power supply adopts the direct way of output, therefore do not have over-voltage protecting function, and cost is high, efficient is low, volume is large, weight is large and job insecurity.
Summary of the invention
The purpose of this utility model provides a kind of 5V stabilized voltage power supply with defencive function with regard to being in order to address the above problem.
The utility model is achieved through the following technical solutions above-mentioned purpose:
The utility model comprises transformer, switch, fuse, rectification circuit, bidirectional triode thyristor, three terminal regulator, the first diode, the second diode, voltage-stabiliser tube, light-emitting diode, the first electric capacity to the eight electric capacity, the first resistance to the four resistance, the on high-tension side two ends of described transformer are connected with the two ends of AC power by described switch, one end of the low-pressure side of described transformer simultaneously with the first end of described fuse be connected the first end of the first electric capacity and be connected, the other end of the low-pressure side of described transformer simultaneously with the second end of described the first electric capacity be connected the end of input of rectification circuit and be connected, the other end of the input of described rectification circuit is connected with the second end of described fuse, the cathode output end while of described rectification circuit and the first end of described the second electric capacity, the positive pole of described bidirectional triode thyristor, the first end of described the 4th electric capacity, the first end of described the first resistance, the first end of described the second resistance, the emitter of described triode be connected the negative pole of the first diode and connect, the cathode output end while of described rectification circuit and the second end of described the second electric capacity, the negative pole of described bidirectional triode thyristor, the first end of described the 3rd electric capacity, the second end of described the 4th electric capacity, the second end of described the first electric capacity, the first end of described the 5th electric capacity, the first end of described the 6th electric capacity, the negative pole of described three terminal regulator, the first end of described the 7th electric capacity, the first end of described the 3rd resistance, the negative pole of described light-emitting diode be connected the negative power supply output and connect, the control end while of described bidirectional triode thyristor and the second end of described the 3rd electric capacity, the positive pole of described voltage-stabiliser tube be connected the second end of the 3rd resistance and connect, the second end while of described the second resistance and the second end of described the 5th electric capacity, the base stage of described triode, the negative pole of described the second diode, the second end of described the 6th electric capacity be connected the input of three terminal regulator and connect, the output while of described three terminal regulator and the second end of described the 7th electric capacity, the positive pole of described the second diode, the collector electrode of described triode, the positive pole of described the first diode, the negative pole of described voltage-stabiliser tube, the first end of described the 4th resistance is connected with cathode output end, and the second end of described the 4th resistance is connected with the positive pole of described light-emitting diode; Described triode is the positive-negative-positive triode.
The beneficial effects of the utility model are:
The utlity model has the stabilized voltage power supply of over-voltage protecting function; adopt collector electrode output tandem type voltage regulation way; have: cost is low, efficient is high, volume is little, lightweight, ripple is few and the stability high; also have the stream of expansion and over-pressure safety device; but Experiment of Electrical Circuits is done in the laboratory; also can make the power supply of solid-state circuit and microprocessor, also can be used as the power supply of other circuit such as instrumentation, instrument.
Description of drawings
Fig. 1 is circuit structure schematic diagram of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing:
As shown in drawings: the utility model comprises transformer T, switch S, fuse FU, rectification circuit SR, bidirectional triode thyristor VS, three terminal regulator IC, the first diode VD1, the second diode VD2, voltage-stabiliser tube DW, LED, the first capacitor C 1 to the 8th capacitor C 8, the first resistance R 1 to the 4th resistance R 4, the on high-tension side two ends of transformer T are connected with the two ends of AC power by switch S, one end of the low-pressure side of transformer T simultaneously with the first end of fuse FU be connected the first end of capacitor C 1 and be connected, the other end of the low-pressure side of transformer T simultaneously and the second end of the first capacitor C 1 be connected an end of input with rectification circuit SR and be connected, the other end of the input of rectification circuit SR is connected with the second end of fuse FU, the cathode output end while of rectification circuit FU and the first end of the second capacitor C 2, the positive pole of bidirectional triode thyristor VS, the first end of the 4th capacitor C 4, the first end of the first resistance R 1, the first end of the second resistance R 2, the emitter of triode VT be connected the negative pole of diode VD1 and connect, the cathode output end while of rectification circuit SR and the second end of the second capacitor C 2, the negative pole of bidirectional triode thyristor VS, the first end of the 3rd capacitor C 3, the second end of the 4th capacitor C 4, the second end of the first capacitor C 1, the first end of the 5th capacitor C 5, the first end of the 6th capacitor C 6, the negative pole of three terminal regulator IC, the first end of the 7th capacitor C 7, the first end of the 3rd resistance R 3, the negative pole of LED is connected with the negative power supply output, the control end while of bidirectional triode thyristor VS and the second end of the 3rd capacitor C 3, the second end of the positive pole of voltage-stabiliser tube DW and the 3rd resistance R 3 connects, the second end while of the second resistance R 2 and the second end of the 5th capacitor C 5, the base stage of triode VT, the negative pole of the second diode VD2, the second end of the 6th capacitor C 6 is connected input and is connected with three terminal regulator IC, the output while of three terminal regulator IC and the second end of the 7th capacitor C 7, the positive pole of the second diode VD2, the collector electrode of triode VT, the positive pole of the first diode VD1, the negative pole of voltage-stabiliser tube DW, the first end of the 4th resistance R 4 is connected with cathode output end, and the second end of the 4th resistance R 4 is connected with the positive pole of LED; Triode VT is the positive-negative-positive triode.
As shown in drawings: Closing Switch S, civil power 220V voltage obtains the 11.5v alternating current through transformer T step-down, rectification circuit SR bridge rectifier, 4 filtering of the 4th capacitor C, the voltage stabilizing of three terminal regulator IC1 can obtain level and smooth 5V direct voltage.The maximum output current of three terminal regulator IC1 is 1.5A, and the large power triode VT among the figure plays and expands the stream effect, can make output current greater than 1.5A.This is a kind of and the formula that connects expands the stream mode, and namely the input of three terminal regulator IC1 links to each other with the base stage of triode VT, and the output of three terminal regulator IC1 links to each other with the collector electrode of triode VT, and such two output current sums can reach 6A.If need larger electric current, can adopt 2～3 high power valve parallel connections.Three terminal regulator IC1 contains inside overheated and the place of safety protective circuit.However; the moment overvoltage still might occur in the output end of stabilized voltage supply that is comprised of three terminal regulator IC1 and triode VT etc.; for guaranteeing the safety of load; the utility model has been set up again overvoltage crowbar, and this circuit is comprised of voltage-stabiliser tube DW, the 3rd resistance R 3, bidirectional triode thyristor VS and fuse FU etc.As shown in drawings: output voltage is 5V during the utility model normal operation, and bidirectional triode thyristor VS is cut-off state.When for a certain reason (damaging or adjust pipe such as integrated circuit punctures) when making output voltage surpass limit value (〉=5.6v); voltage-stabiliser tube DW punctures; voltage VR3 on such the 3rd resistance R 3 raises and makes bidirectional triode thyristor VS triggering and conducting; cause fuse FU fusing, thereby protected load.As shown in drawings: the emitter of triode VT and inter-collector and three terminal regulator IC1 input and output in parallel respectively the first diode VD1 and the second diode VD2, be used for protecting triode VT and integrated circuit.When input is short-circuited or output overvoltage and when making bidirectional triode thyristor VS conducting cause the input short circuit, voltage-stabiliser tube DW input terminal voltage is zero because of fuse FU fusing immediately, electric charge sufficient on output the 8th capacitor C 8 then can not discharge immediately, thereby cause the output transient voltage to be higher than input terminal voltage, in order to prevent that this peak-inverse voltage from puncturing triode VT or three terminal regulator IC, utilizes the first diode VD1 and the second diode VD2 that this charge discharging resisting is fallen.The first capacitor C 1 and the second capacitor C 2 are input and output capacitors of rectification circuit SR, can suppress high-frequency harmonic and disturb.The first resistance R 1 provides the leakage current loop for the 4th capacitor C 4, and LED is used for the work indication.
Claims (2)
1. 5V stabilized voltage power supply with defencive function; it is characterized in that: comprise transformer; switch; fuse; rectification circuit; bidirectional triode thyristor; three terminal regulator; the first diode; the second diode; voltage-stabiliser tube; light-emitting diode; the first electric capacity to the eight electric capacity; the first resistance to the four resistance; the on high-tension side two ends of described transformer are connected with the two ends of AC power by described switch; one end of the low-pressure side of described transformer simultaneously with the first end of described fuse be connected the first end of the first electric capacity and be connected; the other end of the low-pressure side of described transformer simultaneously with the second end of described the first electric capacity be connected the end of input of rectification circuit and be connected; the other end of the input of described rectification circuit is connected with the second end of described fuse; the cathode output end while of described rectification circuit and the first end of described the second electric capacity; the positive pole of described bidirectional triode thyristor; the first end of described the 4th electric capacity; the first end of described the first resistance; the first end of described the second resistance; the emitter of described triode be connected the negative pole of the first diode and connect; the cathode output end while of described rectification circuit and the second end of described the second electric capacity; the negative pole of described bidirectional triode thyristor; the first end of described the 3rd electric capacity; the second end of described the 4th electric capacity; the second end of described the first electric capacity; the first end of described the 5th electric capacity; the first end of described the 6th electric capacity; the negative pole of described three terminal regulator; the first end of described the 7th electric capacity; the first end of described the 3rd resistance; the negative pole of described light-emitting diode be connected the negative power supply output and connect; the control end while of described bidirectional triode thyristor and the second end of described the 3rd electric capacity; the positive pole of described voltage-stabiliser tube be connected the second end of the 3rd resistance and connect; the second end while of described the second resistance and the second end of described the 5th electric capacity; the base stage of described triode; the negative pole of described the second diode; the second end of described the 6th electric capacity be connected the input of three terminal regulator and connect; the output while of described three terminal regulator and the second end of described the 7th electric capacity; the positive pole of described the second diode; the collector electrode of described triode; the positive pole of described the first diode; the negative pole of described voltage-stabiliser tube; the first end of described the 4th resistance is connected with cathode output end, and the second end of described the 4th resistance is connected with the positive pole of described light-emitting diode.
2. the 5V stabilized voltage power supply with defencive function according to claim 1, it is characterized in that: described triode is the positive-negative-positive triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220264108 CN202696489U (en) | 2012-06-06 | 2012-06-06 | 5 V stabilized voltage supply with protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220264108 CN202696489U (en) | 2012-06-06 | 2012-06-06 | 5 V stabilized voltage supply with protection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202696489U true CN202696489U (en) | 2013-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220264108 Expired - Fee Related CN202696489U (en) | 2012-06-06 | 2012-06-06 | 5 V stabilized voltage supply with protection function |
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| CN (1) | CN202696489U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103475237A (en) * | 2012-06-06 | 2013-12-25 | 成都掌握移动信息技术有限公司 | 5V stabilized voltage supply with protection function |
| CN104393561A (en) * | 2014-11-10 | 2015-03-04 | 成都爱斯顿测控技术有限公司 | Overvoltage protecting power circuit applied to storage |
| CN104967343A (en) * | 2015-07-10 | 2015-10-07 | 四川奇胜科技有限公司 | Power supply module for rotation speed sensor |
-
2012
- 2012-06-06 CN CN 201220264108 patent/CN202696489U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103475237A (en) * | 2012-06-06 | 2013-12-25 | 成都掌握移动信息技术有限公司 | 5V stabilized voltage supply with protection function |
| CN104393561A (en) * | 2014-11-10 | 2015-03-04 | 成都爱斯顿测控技术有限公司 | Overvoltage protecting power circuit applied to storage |
| CN104967343A (en) * | 2015-07-10 | 2015-10-07 | 四川奇胜科技有限公司 | Power supply module for rotation speed sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130123 Termination date: 20130606 |