CN112510993A - High voltage stabilizer - Google Patents
High voltage stabilizer Download PDFInfo
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- CN112510993A CN112510993A CN201910871944.9A CN201910871944A CN112510993A CN 112510993 A CN112510993 A CN 112510993A CN 201910871944 A CN201910871944 A CN 201910871944A CN 112510993 A CN112510993 A CN 112510993A
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- transistor
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- diode
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
- H02M3/07—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps
Abstract
A high voltage regulator, comprising: the first resistor is provided with a first end for receiving the direct current input voltage and a second end; a second resistor electrically connected between the first resistor and ground; a first transistor having a first terminal electrically connected to the second terminal of the first resistor, a grounded second terminal, and a control terminal; a third resistor electrically connected between the control terminal of the first transistor and ground; the fourth resistor is provided with a first end and a second end which are electrically connected with the first end of the first resistor; a second transistor having a first terminal electrically connected to the second terminal of the fourth resistor, a control terminal electrically connected to the second terminal of the first resistor, and a second terminal; and a first diode having an anode and a cathode electrically connected to the control terminal of the first transistor and the second terminal of the second transistor, respectively.
Description
Technical Field
The present invention relates to voltage regulators, and more particularly to a high voltage regulator.
Background
A zener diode in the conventional high voltage regulator is directly electrically connected to a high voltage input terminal and is continuously turned on, so that the high voltage regulator has the disadvantages of continuous heating and power consumption. Therefore, there is still room for improvement in the existing high voltage regulators.
Disclosure of Invention
The invention aims to provide a high-voltage regulator capable of reducing heat generation and power consumption.
The high voltage stabilizer comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a first transistor, a second transistor and a first diode.
The first resistor has a first terminal for receiving a high DC input voltage, and a second terminal.
The second resistor is electrically connected between the second end of the first resistor and ground.
The first transistor has a first end electrically connected to the second end of the first resistor, a second end grounded, and a control end.
The third resistor is electrically connected between the control terminal of the first transistor and ground.
The fourth resistor has a first end electrically connected to the first end of the first resistor, and a second end.
The second transistor has a first end electrically connected to the second end of the fourth resistor, a second end providing a dc output voltage, and a control end electrically connected to the second end of the first resistor.
The first diode has an anode electrically connected to the control terminal of the first transistor and a cathode electrically connected to the second terminal of the second transistor.
In the high voltage regulator of the present invention, the first diode is a zener diode.
The high voltage stabilizer of the invention also comprises a second diode which is provided with an anode which is grounded and a cathode which is electrically connected with the second end of the second transistor.
The high voltage regulator of the present invention further comprises a capacitor electrically connected between the second terminal of the second transistor and ground.
In the high voltage regulator of the present invention, the first diode and the second diode are each a zener diode.
In the high voltage regulator of the present invention, a zener voltage of the second diode is greater than the dc output voltage.
In the high voltage regulator of the present invention, the first transistor and the second transistor are each an N-type mosfet.
The high voltage regulator of the present invention includes a first transistor and a second transistor, wherein the first transistor is an NPN-type bipolar transistor, the second transistor is an N-type mosfet, and the high voltage regulator further includes a current-limiting resistor having a first end electrically connected to the control end of the first transistor and a second end electrically connected to the anode of the first diode and the second end of the third resistor.
The invention has the beneficial effects that: the first diode can not directly receive the direct current input voltage, and further the first diode can not be conducted all the time, so that the high-voltage stabilizer can reduce the heating and the power consumption compared with the traditional high-voltage stabilizer.
Drawings
Other features and effects of the present invention will be clearly apparent from the embodiments with reference to the drawings:
fig. 1 is a circuit diagram illustrating a first embodiment of the high voltage regulator of the present invention; and
fig. 2 is a circuit diagram illustrating a second embodiment of the high voltage regulator of the present invention.
Detailed Description
Before the present invention is described in detail, it should be noted that in the following description, like elements are represented by like reference numerals.
< first embodiment >
Referring to fig. 1, a first embodiment of the high voltage regulator of the present invention includes a first resistor 10, a second resistor 11, a third resistor 12, a fourth resistor 13, a first transistor 14, a second transistor 15, a first diode 16, a second diode 17, and a capacitor 18.
The first resistor 10 has a first terminal for receiving a high-voltage dc input voltage Vi, and a second terminal. In the present embodiment, the dc input voltage Vi is, for example, 100V to 240V.
The second resistor 11 is electrically connected between the second end of the first resistor 10 and ground.
The first transistor 14 has a first terminal electrically connected to the second terminal of the first resistor 10, a second terminal connected to ground, and a control terminal.
The third resistor 12 is electrically connected between the control terminal of the first transistor 14 and ground.
The fourth resistor 13 has a first end electrically connected to the first end of the first resistor 10, and a second end.
The second transistor 15 has a first end electrically connected to the second end of the fourth resistor 13, a second end providing a dc output voltage Vo, and a control end electrically connected to the second end of the first resistor 10.
The first diode 16 has an anode electrically connected to the control terminal of the first transistor 14, and a cathode electrically connected to the second terminal of the second transistor 15.
The second diode 17 has an anode connected to ground and a cathode electrically connected to the second terminal of the second transistor 15.
The capacitor 18 is electrically connected between the second terminal of the second transistor 15 and ground.
It should be noted that, in the present embodiment, the first and second diodes 16 and 17 are each a zener diode. The first and second transistors 14 and 15 are each an N-type mosfet, and a drain, a source, and a gate of the N-type mosfet are the first end, the second end, and the control end of the first and second transistors 14 and 15, respectively.
In detail, in operation, when the dc output voltage Vo is less than a zener voltage of the first diode 16, the first diode 16 is not conducted, such that the first transistor 14 is not conducted, the second transistor 15 is conducted, and the capacitor 18 is charged according to the dc output voltage Vo. When the dc output voltage Vo is greater than or equal to the zener voltage of the first diode 16, the first diode 16 is turned on, such that the first transistor 14 is turned on, the second transistor 15 is turned off, and a voltage across the capacitor 18 is used as the dc output voltage Vo. In addition, the second diode 17 is used for receiving an instantaneous high voltage when the second transistor 15 is turned on, so as to prevent the first transistor 14 from being burnt. In this embodiment, a zener voltage of the second diode 17 is greater than the dc output voltage Vo, so that the second diode 17 is not turned on, and the second diode 17 does not consume power.
< second embodiment >
Referring to fig. 2, a second embodiment of the high voltage regulator of the present invention is similar to the first embodiment, and differs therefrom in that: replacing the first transistor 14 of fig. 1 with a first transistor 14'; and the high voltage regulator further comprises a current limiting resistor 19.
The current limiting resistor 19 has a first terminal electrically connected to the control terminal of the first transistor 14' and a second terminal electrically connected to the anode of the first diode 16 and the third resistor 12.
It should be noted that, in the present embodiment, the first transistor 14 'is an NPN-type bipolar transistor, and a collector, an emitter and a base of the NPN-type bipolar transistor are the first terminal, the second terminal and the control terminal of the first transistor 14', respectively. The operation of the high voltage regulator of the second embodiment is similar to the operation of the high voltage regulator of the first embodiment, and therefore, the description thereof is omitted.
In summary, the first and second diodes 16 and 17 of the high voltage regulator of the present invention do not directly receive the dc input voltage Vi, so that the first and second diodes 16 and 17 are not always turned on, a conducting current of the first diode 16 is smaller than a conducting current of a zener diode of the conventional high voltage regulator, and the zener voltage of the second diode 17 is greater than the dc output voltage Vo, so that the second diode 17 consumes almost no power. In addition, the high-voltage stabilizer has the characteristics of simpler circuit, lower cost and the like.
The above description is only an example of the present invention, and the scope of the present invention should not be limited thereby, and the invention is still within the scope of the present invention by simple equivalent changes and modifications made according to the claims and the contents of the specification.
Claims (8)
1. A high voltage regulator, comprising:
a first resistor having a first terminal for receiving a high DC input voltage, and a second terminal;
the second resistor is electrically connected between the second end of the first resistor and the ground;
a first transistor having a first terminal electrically connected to the second terminal of the first resistor, a second terminal grounded, and a control terminal;
a third resistor electrically connected between the control terminal of the first transistor and ground;
a fourth resistor having a first end electrically connected to the first end of the first resistor, and a second end;
a second transistor having a first end electrically connected to the second end of the fourth resistor, a second end providing a dc output voltage, and a control end electrically connected to the second end of the first resistor; and
the first diode is provided with an anode electrically connected with the control end of the first transistor and a cathode electrically connected with the second end of the second transistor.
2. The high voltage regulator of claim 1, wherein: the first diode is a zener diode.
3. The high voltage regulator according to claim 1, further comprising:
and a second diode having an anode connected to ground and a cathode electrically connected to the second terminal of the second transistor.
4. The high voltage regulator of claim 3, further comprising:
and the capacitor is electrically connected between the second end of the second transistor and the ground.
5. The high voltage regulator of claim 3, wherein: the first diode and the second diode are each a zener diode.
6. The high voltage regulator of claim 5, wherein: a zener voltage of the second diode is greater than the DC output voltage.
7. The high voltage regulator of claim 1, wherein: the first transistor and the second transistor are each an N-type mosfet.
8. The high voltage regulator of claim 1, wherein the first transistor is an NPN bipolar transistor and the second transistor is an N-type MOSFET, the high voltage regulator further comprising:
the current limiting resistor is provided with a first end electrically connected with the control end of the first transistor and a second end electrically connected with the anode of the first diode and the third resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910871944.9A CN112510993A (en) | 2019-09-16 | 2019-09-16 | High voltage stabilizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910871944.9A CN112510993A (en) | 2019-09-16 | 2019-09-16 | High voltage stabilizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112510993A true CN112510993A (en) | 2021-03-16 |
Family
ID=74924074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910871944.9A Pending CN112510993A (en) | 2019-09-16 | 2019-09-16 | High voltage stabilizer |
Country Status (1)
| Country | Link |
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| CN (1) | CN112510993A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4639551A (en) * | 1983-07-22 | 1987-01-27 | Thomson-Csf | Regulated power supply circuit particularly for telephone set |
| US20090261894A1 (en) * | 2008-04-18 | 2009-10-22 | Innocom Technology (Shenzhen) Co., Ltd. | Over-voltage protection circuit and LCD driving circuit using the same |
| JP2009284688A (en) * | 2008-05-23 | 2009-12-03 | Rohm Co Ltd | Overvoltage protecting circuit and power management circuit using the same, and electronic apparatus |
| RU2394266C1 (en) * | 2009-05-15 | 2010-07-10 | Государственное образовательное учреждение высшего профессионального образования "Южно-Российский государственный университет экономики и сервиса" (ГОУ ВПО "ЮРГУЭС") | Balance-type voltage stabiliser |
| CN102075002A (en) * | 2010-12-29 | 2011-05-25 | 深圳市火天光电科技有限公司 | Dual power supply circuit |
| US20160365725A1 (en) * | 2015-06-11 | 2016-12-15 | Keeper Technology Co., Ltd. | Surge protection device |
| CN108695838A (en) * | 2018-05-18 | 2018-10-23 | 向玲丽 | A kind of power supply or signal transmission plug-in unit |
| TWI653800B (en) * | 2018-01-09 | 2019-03-11 | 咸瑞科技股份有限公司 | Water resistance overvoltage protection circuit |
-
2019
- 2019-09-16 CN CN201910871944.9A patent/CN112510993A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4639551A (en) * | 1983-07-22 | 1987-01-27 | Thomson-Csf | Regulated power supply circuit particularly for telephone set |
| US20090261894A1 (en) * | 2008-04-18 | 2009-10-22 | Innocom Technology (Shenzhen) Co., Ltd. | Over-voltage protection circuit and LCD driving circuit using the same |
| JP2009284688A (en) * | 2008-05-23 | 2009-12-03 | Rohm Co Ltd | Overvoltage protecting circuit and power management circuit using the same, and electronic apparatus |
| RU2394266C1 (en) * | 2009-05-15 | 2010-07-10 | Государственное образовательное учреждение высшего профессионального образования "Южно-Российский государственный университет экономики и сервиса" (ГОУ ВПО "ЮРГУЭС") | Balance-type voltage stabiliser |
| CN102075002A (en) * | 2010-12-29 | 2011-05-25 | 深圳市火天光电科技有限公司 | Dual power supply circuit |
| US20160365725A1 (en) * | 2015-06-11 | 2016-12-15 | Keeper Technology Co., Ltd. | Surge protection device |
| TWI653800B (en) * | 2018-01-09 | 2019-03-11 | 咸瑞科技股份有限公司 | Water resistance overvoltage protection circuit |
| CN108695838A (en) * | 2018-05-18 | 2018-10-23 | 向玲丽 | A kind of power supply or signal transmission plug-in unit |
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Application publication date: 20210316 |
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