CN202126641U - Depressurization circuit at front end of low-voltage-difference linear voltage regulator - Google Patents
Depressurization circuit at front end of low-voltage-difference linear voltage regulator Download PDFInfo
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- CN202126641U CN202126641U CN2011201562991U CN201120156299U CN202126641U CN 202126641 U CN202126641 U CN 202126641U CN 2011201562991 U CN2011201562991 U CN 2011201562991U CN 201120156299 U CN201120156299 U CN 201120156299U CN 202126641 U CN202126641 U CN 202126641U
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- difference linear
- voltage regulator
- linear voltage
- low pressure
- pressure difference
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Abstract
The utility model discloses a depressurization circuit at a front end of a low-voltage-difference linear voltage regulator, comprising power supplies (VCC1 and VCC2), diodes (D1 and D2), capacitors (C1 and C2), the low-voltage-difference linear voltage regulator and an electrolytic capacitor E1, wherein the low-voltage-difference linear voltage regulator is provided with an input end V1, output ends (VO1 and VO2) and an automatic voltage regulating end ADJ; the diode D1 is connected with the diode D2 in series; the anode of the diode D1 is connected with the power supply VCC1; the cathode of the diode D2 is connected with the input end V1 and the capacitor C1 of the low-voltage-difference linear voltage regulator respectively; the other end of the capacitor C1 is connected with the automatic voltage regulating end ADJ of the low-voltage-difference linear voltage regulator, the cathode of the electrolytic capacitor E1 and one end of the capacitor C2 respectively and then is grounded; and the output ends (VO1 and VO2) of the low-voltage-difference linear voltage regulator are both connected with the anode of the electrolytic capacitor E1, the power supply VCC2 and one end of the capacitor C2. The depressurization circuit has a simple structure and a low cost, effectively reduces the working temperature of the low-voltage-difference linear voltage regulator, and prolongs the service life of the low-voltage-difference linear voltage regulator.
Description
Technical field
The utility model relates to power supply reduction voltage circuit field, relates in particular to a kind of low pressure difference linear voltage regulator front end reduction voltage circuit.
Background technology
Low pressure difference linear voltage regulator (Low Dropout Regulator, LDO) low because of its cost, noise is low, quiescent current is little etc., and outstanding advantage is widely used in the electronic product.In addition, the low pressure difference linear voltage regulator outward element is also less, only needs external one or two shunt capacitance usually, brings great convenience to people.
But when said low pressure difference linear voltage regulator is operated in condition of high voltage following time, the Yin Wendu of regular meeting is too high and shorten serviceable life of said low pressure difference linear voltage regulator.
Therefore, be necessary to provide a kind of low pressure difference linear voltage regulator front end reduction voltage circuit simple in structure, with low cost to come the effectively working temperature of the said low pressure difference linear voltage regulator of reduction, to prolong the serviceable life of said low pressure difference linear voltage regulator.
The utility model content
The purpose of the utility model provides a kind of low pressure difference linear voltage regulator front end reduction voltage circuit, and this circuit structure is simple, with low cost, can reduce the working temperature of low pressure difference linear voltage regulator effectively, to prolong the serviceable life of said low pressure difference linear voltage regulator.
For realizing above-mentioned purpose; The utility model provides a kind of low pressure difference linear voltage regulator front end reduction voltage circuit; Comprise power supply VCC1, VCC2, diode D1, D2, capacitor C 1, C2; Low pressure difference linear voltage regulator and electrochemical capacitor E1; Said low pressure difference linear voltage regulator has input end VI, output terminal VO1, VO2 and voltage and adjusts end ADJ automatically, said diode D1, D2 series connection, and the anode of said diode D1 is connected with power supply VCC1; The negative electrode of said diode D2 is connected respectively with input end VI, the capacitor C 1 of said low pressure difference linear voltage regulator; The other end of said capacitor C 1 and the steady voltage of said low pressure difference linearity voltage stabilizing are adjusted end ADJ, the negative electrode of electrochemical capacitor E1, an end of capacitor C 2 automatically and are connected respectively, and connect back ground connection, and the output terminal VO1 of said low pressure difference linear voltage regulator, VO2 all are connected with an end of anode, power supply VCC2 and the capacitor C 2 of electrochemical capacitor E1.
Particularly, said power supply VCC1 is+5v that said power supply VCC2 is+1.8v.
Compared with prior art; Because the diode D1 of the low pressure difference linear voltage regulator front end reduction voltage circuit of the utility model, D2 series connection; And the anode of said diode D1 is connected with power supply VCC1; The negative electrode of said diode D2 is connected with the input end VI of said low pressure difference linear voltage regulator; Promptly introduced diode D1, D2 step-down, thereby can reduce the voltage difference between said low pressure difference linear voltage regulator input voltage and the output voltage, promptly reduced the power consumption of supply voltage on low pressure difference linear voltage regulator at the front end of said low pressure difference linear voltage regulator; Thereby make the working temperature of said low pressure difference linear voltage regulator reduce, increased the serviceable life of said low pressure difference linear voltage regulator.In addition, the low pressure difference linear voltage regulator front end reduction voltage circuit of the utility model is simple in structure, with low cost.
Through following description and combine accompanying drawing, it is more clear that the utility model will become, and these accompanying drawings are used to explain the embodiment of the utility model.
Description of drawings
Fig. 1 is the circuit diagram of the utility model low pressure difference linear voltage regulator front end reduction voltage circuit one embodiment.
Embodiment
With reference now to accompanying drawing, describe the embodiment of the utility model, the similar elements label is represented similar elements in the accompanying drawing.As stated; The utility model provides a kind of low pressure difference linear voltage regulator front end reduction voltage circuit; Because diode D1, D2 series connection; And the anode of said diode D1 is connected with power supply VCC1, and the negative electrode of said diode D2 is connected with the input end VI of said low pressure difference linear voltage regulator, has promptly introduced diode D1, D2 step-down at the front end of said low pressure difference linear voltage regulator; Thereby can reduce the voltage difference between said low pressure difference linear voltage regulator input voltage and the output voltage; Promptly reduce the power consumption of supply voltage on low pressure difference linear voltage regulator, thereby make the working temperature of said low pressure difference linear voltage regulator reduce, increased the serviceable life of said low pressure difference linear voltage regulator.In addition, the low pressure difference linear voltage regulator front end reduction voltage circuit of the utility model is simple in structure, with low cost.
Please refer to Fig. 1; One embodiment of the utility model low pressure difference linear voltage regulator front end reduction voltage circuit comprises power supply VCC1, VCC2; Diode D1, D2; Capacitor C 1, C2, low pressure difference linear voltage regulator and electrochemical capacitor E1, said low pressure difference linear voltage regulator have input end VI, output terminal VO1, VO2 and voltage and adjust end ADJ automatically; Said diode D1, D2 series connection; And the anode of said diode D1 is connected with power supply VCC1, and the negative electrode of said diode D2 is connected respectively with input end VI, the capacitor C 1 of said low pressure difference linear voltage regulator, and the other end of said capacitor C 1 is adjusted automatically with the steady voltage of said low pressure difference linearity voltage stabilizing and held ADJ, the negative electrode of electrochemical capacitor E1, an end of capacitor C 2 to be connected respectively; And connect back ground connection, the output terminal VO1 of said low pressure difference linear voltage regulator, VO2 all are connected with an end of anode, power supply VCC2 and the capacitor C 2 of electrochemical capacitor E1.
Wherein, power supply VCC1 is+5v that power supply VCC2 is+1.8v.
The principle of work of the utility model is following: when input supply voltage VCC1 be+during 5v; Through diode D1, D2 step-down; 1.4v (pressure drop of each diode is about 0.7v) makes that the voltage of A point (being the input end VI of said low pressure difference linear voltage regulator) is 5v-1.4v=3.6v altogether.So just, reduced the voltage difference between said low pressure difference linear voltage regulator input voltage and the output voltage; Reduce the power consumption of supply voltage on low pressure difference linear voltage regulator; Thereby make the working temperature of said low pressure difference linear voltage regulator reduce, increased the serviceable life of said low pressure difference linear voltage regulator.
More than combine most preferred embodiment that the utility model is described, but the utility model is not limited to the embodiment of above announcement, and should contains various modification, equivalent combinations of carrying out according to the essence of the utility model.
Claims (2)
1. low pressure difference linear voltage regulator front end reduction voltage circuit; Comprise power supply VCC1, VCC2; Diode D1, D2; Capacitor C 1, C2, low pressure difference linear voltage regulator and electrochemical capacitor E1, said low pressure difference linear voltage regulator have input end VI, output terminal VO1, VO2 and voltage and adjust end ADJ automatically; Said diode D1, D2 series connection; And the anode of said diode D1 is connected with power supply VCC1, and the negative electrode of said diode D2 is connected respectively with input end VI, the capacitor C 1 of said low pressure difference linear voltage regulator, and the other end of said capacitor C 1 is adjusted automatically with the voltage of said low pressure difference linear voltage regulator and held ADJ, the negative electrode of electrochemical capacitor E1, an end of capacitor C 2 to be connected respectively; And connect back ground connection, the output terminal VO1 of said low pressure difference linear voltage regulator, VO2 all are connected with an end of anode, power supply VCC2 and the capacitor C 2 of electrochemical capacitor E1.
2. low pressure difference linear voltage regulator front end reduction voltage circuit as claimed in claim 1 is characterized in that: said power supply VCC1 is+5v that said power supply VCC2 is+1.8v.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201562991U CN202126641U (en) | 2011-05-17 | 2011-05-17 | Depressurization circuit at front end of low-voltage-difference linear voltage regulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201562991U CN202126641U (en) | 2011-05-17 | 2011-05-17 | Depressurization circuit at front end of low-voltage-difference linear voltage regulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202126641U true CN202126641U (en) | 2012-01-25 |
Family
ID=45489707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201562991U Expired - Lifetime CN202126641U (en) | 2011-05-17 | 2011-05-17 | Depressurization circuit at front end of low-voltage-difference linear voltage regulator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202126641U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110611898A (en) * | 2019-10-11 | 2019-12-24 | 中铁轨道交通装备有限公司 | High-reliability vehicle-ground communication system based on Internet of things |
| CN114625199A (en) * | 2022-02-15 | 2022-06-14 | 苏州涌现智能科技有限公司 | Integrated circuit system |
-
2011
- 2011-05-17 CN CN2011201562991U patent/CN202126641U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110611898A (en) * | 2019-10-11 | 2019-12-24 | 中铁轨道交通装备有限公司 | High-reliability vehicle-ground communication system based on Internet of things |
| CN110611898B (en) * | 2019-10-11 | 2023-06-06 | 中铁轨道交通装备有限公司 | High-reliability train-ground communication system based on Internet of things |
| CN114625199A (en) * | 2022-02-15 | 2022-06-14 | 苏州涌现智能科技有限公司 | Integrated circuit system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: GUANGZHOU SHIYUAN ELECTRONIC TECHNOLOGY CO., LTD. Free format text: FORMER NAME: GUANGZHOU SHIYUAN ELECTRONICS TECHNOLOGY CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 510663 Guangdong city of Guangzhou province Guangzhou Science City Kezhu Road No. 192 Patentee after: Guangzhou CVT Electronics Technology Co., Ltd. Address before: 510663 Guangdong city of Guangzhou province Guangzhou Science City Kezhu Road No. 192 Patentee before: Guangzhou Shiyuan Electronics Technology Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20120125 |
|
| CX01 | Expiry of patent term |