CN204440217U - Based on the power circuit of three-terminal voltage-stabilizing chip - Google Patents
Based on the power circuit of three-terminal voltage-stabilizing chip Download PDFInfo
- Publication number
- CN204440217U CN204440217U CN201520189041.XU CN201520189041U CN204440217U CN 204440217 U CN204440217 U CN 204440217U CN 201520189041 U CN201520189041 U CN 201520189041U CN 204440217 U CN204440217 U CN 204440217U
- Authority
- CN
- China
- Prior art keywords
- stabilizing chip
- terminal voltage
- power
- power circuit
- voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Continuous-Control Power Sources That Use Transistors (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
Based on the power circuit of three-terminal voltage-stabilizing chip, belong to power technique fields.Solve the existing power circuit based on voltage stabilizing chip in installation, maintenance or use procedure, during the power supply output point misconnection power end of this power circuit, the problem that voltage stabilizing chip damages by impacting with high pressure.It comprises resistance R1, electric capacity C1, electric capacity C2, three-terminal voltage-stabilizing chip and No. 2 diodes; Resistance R1 is connected between three-terminal voltage-stabilizing chip power input end Vin and the power supply input end based on the power circuit of three-terminal voltage-stabilizing chip, three-terminal voltage-stabilizing chip power input end Vin and based on the power circuit of three-terminal voltage-stabilizing chip power supply ground between shunt capacitance C1, three-terminal voltage-stabilizing chip power output end vo and ground GND hold between shunt capacitance C2; Be in series with No. 2 diodes between the power output end Vo of three-terminal voltage-stabilizing chip and electric capacity C2, and these No. 2 diode anodes are connected with three-terminal voltage-stabilizing chip power output end vo.It is applied in voltage conversion circuit.
Description
Technical field
The present invention relates to a kind of voltage-stabilized power supply circuit, belong to power technique fields.
Background technology
The circuit structure of the existing power circuit based on voltage stabilizing chip is shown in Figure 1, due to the low and good stability of the cost of circuit in this, is widely used.But, in actual applications, the input and output side of this power circuit often needs grafting in product installation, maintenance or use procedure, and when the output terminal misconnection of this power supply enters higher power end, voltage stabilizing chip can damage by impacting with high pressure, and power output function was lost efficacy.
Utility model content
The present invention is to solve the existing power circuit based on voltage stabilizing chip in installation, maintenance or use procedure, during the power supply output point misconnection power end of this power circuit, the problem that voltage stabilizing chip damages by impacting with high pressure, the invention provides a kind of power circuit based on three-terminal voltage-stabilizing chip.
Based on the power circuit of three-terminal voltage-stabilizing chip, it comprises resistance R1, electric capacity C1, electric capacity C2, three-terminal voltage-stabilizing chip and No. 2 diodes;
Resistance R1 is connected between the power input Vin of three-terminal voltage-stabilizing chip and the power supply input end based on the power circuit of three-terminal voltage-stabilizing chip, the power input Vin of three-terminal voltage-stabilizing chip and based on the power circuit of three-terminal voltage-stabilizing chip power supply ground between shunt capacitance C1, shunt capacitance C2 between the power output end Vo of three-terminal voltage-stabilizing chip and ground GND holds;
Be in series with No. 2 diodes between the power output end Vo of three-terminal voltage-stabilizing chip and electric capacity C2, and the anode of these No. 2 diodes is connected with three-terminal voltage-stabilizing chip power output end vo.
It also comprises No. 1 diode;
Be in series with No. 1 diode between the ground GND of three-terminal voltage-stabilizing chip and the power supply ground based on the power circuit of three-terminal voltage-stabilizing chip, and the anode of this No. 1 diode is held with the ground GND of three-terminal voltage-stabilizing chip and is connected.
Described three-terminal voltage-stabilizing chip is 7805,78L05 or 78L06 type circuit of three-terminal voltage-stabilizing integrated.
The beneficial effect that the present invention brings is, the present invention increases and prevents reverse diode D2 between voltage stabilizing chip and power output end, and then can effectively prevent output terminal after other power supply of access, causes voltage stabilizing wafer damage; Hold at the GND of voltage stabilizing chip 1 the booster diode D1 that connects between end and the ground of power circuit over the ground, to ensure that the voltage that power supply exports reaches in expection claimed range simultaneously.Present invention efficiently solves the problem that voltage stabilizing chip damages by impacting with high pressure, power supply exports and also produces a desired effect.
Accompanying drawing explanation
Fig. 1 is the circuit theory schematic diagram of the existing power circuit based on voltage stabilizing chip;
Fig. 2 is the principle schematic of the power circuit based on three-terminal voltage-stabilizing chip described in the utility model.
Embodiment
Embodiment one: present embodiment is described see Fig. 2, the power circuit based on three-terminal voltage-stabilizing chip described in present embodiment, it comprises resistance R1, electric capacity C1, electric capacity C2, three-terminal voltage-stabilizing chip and No. 2 diode D2;
Resistance R1 is connected between the power input Vin of three-terminal voltage-stabilizing chip and the power supply input end based on the power circuit of three-terminal voltage-stabilizing chip, the power input Vin of three-terminal voltage-stabilizing chip and based on the power circuit of three-terminal voltage-stabilizing chip power supply ground between shunt capacitance C1, shunt capacitance C2 between the power output end Vo of three-terminal voltage-stabilizing chip and ground GND holds;
Be in series with No. 2 diode D2 between the power output end Vo of three-terminal voltage-stabilizing chip and electric capacity C2, and the anode of these No. 2 diode D2 is connected with three-terminal voltage-stabilizing chip power output end vo.
Present embodiment, the present invention increases and prevents backward dioded D2 between voltage stabilizing chip and the power output end of power circuit, prevents output terminal to after power supply, causes voltage stabilizing wafer damage; Present invention efficiently solves the problem that voltage stabilizing chip damages by impacting with high pressure, power supply exports and also produces a desired effect.
Embodiment two: present embodiment is described see Fig. 2, the difference of present embodiment and the power circuit based on three-terminal voltage-stabilizing chip described in embodiment one is, it also comprises No. 1 diode D1;
Be in series with No. 1 diode D1 between the ground GND of three-terminal voltage-stabilizing chip and the power supply ground based on the power circuit of three-terminal voltage-stabilizing chip, and the anode of this No. 1 diode D1 is held with the ground GND of three-terminal voltage-stabilizing chip and is connected.
In present embodiment, increase by 1 booster diode D1 between end and ground wire over the ground at the GND end of voltage stabilizing chip, to ensure that the voltage that power supply exports reaches in expection claimed range.
Embodiment three: present embodiment is described see Fig. 2, the difference of present embodiment and the power circuit based on three-terminal voltage-stabilizing chip described in embodiment one is, described three-terminal voltage-stabilizing chip is 7805,78L05 or 78L06 type circuit of three-terminal voltage-stabilizing integrated.
Claims (3)
1., based on the power circuit of three-terminal voltage-stabilizing chip, it comprises resistance R1, electric capacity C1, electric capacity C2, three-terminal voltage-stabilizing chip and No. 2 diodes (D2);
Resistance R1 is connected between the power input Vin of three-terminal voltage-stabilizing chip and the power supply input end based on the power circuit of three-terminal voltage-stabilizing chip, the power input Vin of three-terminal voltage-stabilizing chip and based on the power circuit of three-terminal voltage-stabilizing chip power supply ground between shunt capacitance C1, shunt capacitance C2 between the power output end Vo of three-terminal voltage-stabilizing chip and ground GND holds;
It is characterized in that, be in series with No. 2 diodes (D2) between the power output end Vo of three-terminal voltage-stabilizing chip and electric capacity C2, and the anode of these No. 2 diodes (D2) is connected with three-terminal voltage-stabilizing chip power output end vo.
2. the power circuit based on three-terminal voltage-stabilizing chip according to claim 1, is characterized in that, it also comprises No. 1 diode (D1);
Be in series with No. 1 diode (D1) between the ground GND of three-terminal voltage-stabilizing chip and the power supply ground based on the power circuit of three-terminal voltage-stabilizing chip, and the anode of this No. 1 diode (D1) is held with the ground GND of three-terminal voltage-stabilizing chip and is connected.
3. the power circuit based on three-terminal voltage-stabilizing chip according to claim 1, is characterized in that, described three-terminal voltage-stabilizing chip is 7805,78L05 or 78L06 type circuit of three-terminal voltage-stabilizing integrated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520189041.XU CN204440217U (en) | 2015-03-31 | 2015-03-31 | Based on the power circuit of three-terminal voltage-stabilizing chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520189041.XU CN204440217U (en) | 2015-03-31 | 2015-03-31 | Based on the power circuit of three-terminal voltage-stabilizing chip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204440217U true CN204440217U (en) | 2015-07-01 |
Family
ID=53608058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520189041.XU Active CN204440217U (en) | 2015-03-31 | 2015-03-31 | Based on the power circuit of three-terminal voltage-stabilizing chip |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204440217U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104699165A (en) * | 2015-03-31 | 2015-06-10 | 航天科技控股集团股份有限公司 | Three-terminal voltage regulator chip-based power supply circuit |
-
2015
- 2015-03-31 CN CN201520189041.XU patent/CN204440217U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104699165A (en) * | 2015-03-31 | 2015-06-10 | 航天科技控股集团股份有限公司 | Three-terminal voltage regulator chip-based power supply circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2011078296A5 (en) | ||
| CN203423477U (en) | Overvoltage protection circuit | |
| CN204440217U (en) | Based on the power circuit of three-terminal voltage-stabilizing chip | |
| CN204732869U (en) | A kind of high reliability overvoltage surge protective circuit | |
| CN204465023U (en) | Micro Energy Lose high pressure power-supply circuit | |
| CN104682371A (en) | Large current direct current anti-reverse polarity circuit using MOS (metal oxide semiconductor) tubes | |
| CN204258274U (en) | A kind of overvoltage of wide input voltage range Switching Power Supply and under-voltage protecting circuit | |
| CN104699165A (en) | Three-terminal voltage regulator chip-based power supply circuit | |
| CN204349772U (en) | A kind of linear voltage stabilization power supply circuits | |
| CN203339686U (en) | Constant current source short circuit protection inhibition circuit | |
| CN103595233A (en) | Input protection circuit | |
| CN203205871U (en) | Direct current reverse protection circuit | |
| CN203026930U (en) | Circuit for solving voltage overload of input port of operational amplifier | |
| CN204696910U (en) | A kind of circuit preventing power supply electrifying from directly loading | |
| CN104682369A (en) | Direct current anti-reverse polarity circuit using MOS (metal oxide semiconductor) tube | |
| CN204697016U (en) | A kind of driving pulse amplifying circuit | |
| CN203027121U (en) | Power switch and application circuit based on same | |
| CN204029795U (en) | Transient voltage suppressor device | |
| CN203491907U (en) | Voltage-regulator tube power supply applied to router | |
| CN206060188U (en) | Over-pressed reverse-connection protection circuit | |
| CN204517360U (en) | Excess voltage protection | |
| CN104639132A (en) | Timing circuit for small industrial equipment | |
| CN203151089U (en) | Protection circuit capable of preventing reverse connection of chip power supply | |
| CN204696680U (en) | A kind of overvoltage for sensitive circuit and power source reverse connection protection circuit | |
| CN204794732U (en) | High -pressure shaping circuit of bonding equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |