CN202771295U - Voltage stabilizing circuit - Google Patents
Voltage stabilizing circuit Download PDFInfo
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- CN202771295U CN202771295U CN 201220333056 CN201220333056U CN202771295U CN 202771295 U CN202771295 U CN 202771295U CN 201220333056 CN201220333056 CN 201220333056 CN 201220333056 U CN201220333056 U CN 201220333056U CN 202771295 U CN202771295 U CN 202771295U
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- triode
- diode
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- resistor
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- 230000000087 stabilizing effect Effects 0.000 title claims abstract description 19
- 239000003990 capacitor Substances 0.000 claims description 28
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The utility model belongs to the electronic field and provides a voltage stabilizing circuit. An anode of a D1 is earthed, the output end of the voltage stabilizing circuit is further connected with an emitter of a Q3, a collector of the Q3 is connected with a power supply, a base of the Q3 is connected with the collector of a Q2, the emitter of the Q2 is connected with the collector of a Q1 through a R4, the emitter of the Q1 is earthed, the base of the Q1 is connected with an eighth pin of a singlechip through a R5, the emitter of the Q2 is further connected with a cathode of a D2, the anode of the D2 is connected with the cathode of a D3, the anode of the D3 is connected with the power supply, one end of a C1 and one end of a C2 are connected with the collector of the Q3, the other end of the C1 and the other end of the C2 are respectively earthed, the base of the Q2 is connected with the cathode of a D1 through a R3, the base of the Q2 is connected with ground through a C4, one end of a C3 is connected with the cathode of the D1, and the other end of the C3 is earthed. The technical scheme provided by the voltage stabilizing circuit has the advantage of automatically protecting.
Description
Technical Field
The utility model belongs to the electron field especially relates to a voltage stabilizing circuit.
Background
The conventional voltage regulator circuit is a commonly used circuit of a power supply, and is applied to a power supply of a DVD, for example, and the structure of the conventional voltage regulator circuit is shown in fig. 1, and includes: the circuit comprises a triode Q1, a triode Q2, a triode Q3, a resistor R1, a resistor R2, a resistor R3, a diode D1, a capacitor C1 and a capacitor C2, wherein an emitter of Q1 is connected with a collector of Q2 and then output, a collector of Q1 is connected with a base of Q2 through R2, a base of Q2 is grounded through a diode D1, an emitter of Q2 is connected with a 1 st pin of the single chip microcomputer, one ends of C1 and C2 are connected with an emitter of Q2, and the other ends of the C1 and the C2 are grounded; the base of Q1 is connected with the collector of Q3 through R1, the emitter of Q3 is grounded, and the base of Q3 is connected with the 8 th pin of the singlechip through R3.
In realizing the technical scheme of the utility model, discover that prior art has following problem:
1. the voltage stabilizing circuit is simple, greatly influenced by external factors and narrow in voltage stabilizing range.
2. When the load becomes larger instantly, the voltage stabilizing circuit changes randomly and cannot output stable voltage.
3. After the load is short-circuited, the triode is easily burnt by large current in the moment, and the triode cannot be self-protected.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a voltage stabilizing circuit is solving prior art's the problem that receives external factor to influence greatly, can not self-protection.
The utility model discloses a realize like this, on the one hand, provide a voltage stabilizing circuit, the circuit includes: the circuit comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a diode D1, a diode D2, a diode D3, a triode Q1, a triode Q2 and a triode Q3; wherein,
the anode of the diode D1 is grounded, the cathode of the diode D1 is connected with the output end of the voltage stabilizing circuit through the resistor R1, the output end of the voltage stabilizing circuit is further connected with the emitter of the triode Q3, the collector of the triode Q3 is connected with the power supply, the base of the triode Q3 is connected with the collector of the triode Q2, the emitter of the triode Q2 is connected with the collector of the triode Q1 through the resistor R4, the emitter of the triode Q1 is grounded, the base of the triode Q1 is connected with the 8 th pin of the singlechip through the resistor R5, the emitter of the triode Q2 is further connected with the cathode of the diode D2, the anode of the diode D2 is connected with the cathode of the diode D3, and the anode of the diode;
one ends of the capacitor C1 and the capacitor C2 are connected with the collector of the triode Q3, and the other ends of the capacitor C1 and the capacitor C2 are respectively grounded; the base of the triode Q2 is connected with the cathode of the diode D1 through the resistor R3, the base of the triode Q2 is also connected with the ground through the capacitor C4, one end of the capacitor C3 is connected with the cathode of the diode D1, and the other end of the capacitor C3 is grounded; one end of the resistor R2 is connected to the cathode of the diode D1, and the other end is connected to the collector of the transistor Q3.
Compared with the prior art, the utility model, beneficial effect lies in: because the technical scheme of the utility model increase the negative feedback circuit, can detect the change of output at any time, reliably guarantee that output voltage does not receive the change of load and change.
And output short circuit protection is added, and after the output short circuit occurs, the system automatically protects and automatically cuts off an output power supply.
Drawings
FIG. 1 is a diagram of a voltage regulator circuit according to the prior art;
fig. 2 is a structural diagram of the voltage stabilizing circuit provided by the utility model.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The utility model provides a voltage stabilizing circuit, this circuit are as shown in figure 2, include: a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a diode D1, a diode D2, a diode D3, a triode Q1, a triode Q2 and a triode Q3, wherein the anode of D1 is grounded, the cathode of D1 is connected with the output end of the voltage stabilizing circuit through R1, the output end of the voltage stabilizing circuit is also connected with the emitter of Q3, the collector of Q3 is connected with a power supply, the base of Q3 is connected with the collector of Q2, the emitter of Q2 is connected with the collector of Q4 through R4, the emitter of Q4 is grounded, the base of Q4 is connected with the 8 th pin of the singlechip 21 through R4, the emitter of Q4 is also connected with the cathode of D4, the anode of D4 is connected with the cathode of the singlechip, the first pin of the singlechip 21 is connected with the C4, and the other end of the collector of the singlechip C4 and the collector of the C4, and the other end of the; the base of Q2 is connected with the cathode of D1 through R3, the base of Q2 is also connected with the ground through C4, one end of C3 is connected with the cathode of D1, and the other end of C3 is grounded; one end of R2 is connected to the cathode of D1 and the other end is connected to the collector of Q3.
The utility model provides a circuit increases the negative feedback circuit (being the circuit that D2, D3 and R4 constitute), can detect the change of output at any time, guarantees not to receive the change of load and changes. Output short-circuit protection (namely a circuit consisting of R2, R3, C3, C4 and D1) is added, and after the output short-circuit, the system automatically protects and cuts off the output power supply.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (1)
1. A voltage regulator circuit, the circuit comprising: the circuit comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a diode D1, a diode D2, a diode D3, a triode Q1, a triode Q2 and a triode Q3; wherein,
the anode of the diode D1 is grounded, the cathode of the diode D1 is connected with the output end of the voltage stabilizing circuit through the resistor R1, the output end of the voltage stabilizing circuit is further connected with the emitter of the triode Q3, the collector of the triode Q3 is connected with the power supply, the base of the triode Q3 is connected with the collector of the triode Q2, the emitter of the triode Q2 is connected with the collector of the triode Q1 through the resistor R4, the emitter of the triode Q1 is grounded, the base of the triode Q1 is connected with the 8 th pin of the singlechip through the resistor R5, the emitter of the triode Q2 is further connected with the cathode of the diode D2, the anode of the diode D2 is connected with the cathode of the diode D3, and the anode of the diode;
one ends of the capacitor C1 and the capacitor C2 are connected with the collector of the triode Q3, and the other ends of the capacitor C1 and the capacitor C2 are respectively grounded; the base of the triode Q2 is connected with the cathode of the diode D1 through the resistor R3, the base of the triode Q2 is also connected with the ground through the capacitor C4, one end of the capacitor C3 is connected with the cathode of the diode D1, and the other end of the capacitor C3 is grounded; one end of the resistor R2 is connected to the cathode of the diode D1, and the other end is connected to the collector of the transistor Q3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220333056 CN202771295U (en) | 2012-07-01 | 2012-07-01 | Voltage stabilizing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220333056 CN202771295U (en) | 2012-07-01 | 2012-07-01 | Voltage stabilizing circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202771295U true CN202771295U (en) | 2013-03-06 |
Family
ID=47777858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220333056 Expired - Fee Related CN202771295U (en) | 2012-07-01 | 2012-07-01 | Voltage stabilizing circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202771295U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104102267A (en) * | 2014-07-20 | 2014-10-15 | 苏州塔可盛电子科技有限公司 | Novel voltage stabilizing circuit |
| CN104977967A (en) * | 2015-07-17 | 2015-10-14 | 中国石油集团渤海钻探工程有限公司 | Underground stabilized power supply switch circuit having retardation characteristic |
| CN109358576A (en) * | 2018-10-09 | 2019-02-19 | 六安腾达信息科技有限公司 | Automatic machine room dynamic environment monitoring system |
-
2012
- 2012-07-01 CN CN 201220333056 patent/CN202771295U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104102267A (en) * | 2014-07-20 | 2014-10-15 | 苏州塔可盛电子科技有限公司 | Novel voltage stabilizing circuit |
| CN104977967A (en) * | 2015-07-17 | 2015-10-14 | 中国石油集团渤海钻探工程有限公司 | Underground stabilized power supply switch circuit having retardation characteristic |
| CN109358576A (en) * | 2018-10-09 | 2019-02-19 | 六安腾达信息科技有限公司 | Automatic machine room dynamic environment monitoring 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: 20130306 Termination date: 20140701 |
|
| EXPY | Termination of patent right or utility model |