CN105978338B - Micropower direct-current low-voltage input direct-current high-voltage generator - Google Patents
Micropower direct-current low-voltage input direct-current high-voltage generator Download PDFInfo
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- CN105978338B CN105978338B CN201610479352.9A CN201610479352A CN105978338B CN 105978338 B CN105978338 B CN 105978338B CN 201610479352 A CN201610479352 A CN 201610479352A CN 105978338 B CN105978338 B CN 105978338B
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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
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1582—Buck-boost converters
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Abstract
The present invention relates to a high voltage circuit, and more particularly, to a high voltage circuit for generating a high voltage to be supplied to a CRT (cathode ray tube) or the like. The utility model provides a direct current high voltage generator of micropower direct current low pressure input, its voltage stabilizing circuit who includes boost circuit and be connected with boost circuit which characterized in that: the boost circuit comprises a PWM controller, a first reference voltage source is connected with the PWM controller, the PWM controller is also connected with the boost circuit, the boost circuit is connected with a voltage stabilizing circuit, and the voltage stabilizing circuit is connected with a high voltage source; the BOOST circuit of the BOOST topological structure is formed by adopting the power triode and the PWM controller, the output voltage is regulated to be stabilized at the set output by regulating the duty ratio, a 2.5V voltage reference source is used in the PWM control circuit, and the output voltage is set by the voltage division of the resistor. A primary voltage stabilizing circuit is added behind the booster circuit, so that the voltage stability of the circuit is good. The circuit has the advantages of flexible control, low cost, good stability of output voltage and difficult realization of other special chips.
Description
Technical Field
The present invention relates to a high voltage circuit, and more particularly, to a high voltage circuit for generating a high voltage to be supplied to a CRT (cathode ray tube) or the like.
Background
In practical application, the design of a booster circuit is often involved, for larger power output, due to the limitation of a switch tube inside a special booster chip, high-power boost conversion is difficult to achieve, and the chip is expensive and is greatly limited in practical application. Considering that the selection scope of an external switching tube of the Boost structure is large, a DC/DC booster circuit with large power and stable voltage can be designed by selecting a proper control chip.
Disclosure of Invention
Aiming at the technical problem, the BOOST circuit with the BOOST topological structure is formed by adopting the power triode and the PWM controller, the output voltage is regulated to be stabilized at the set output by regulating the duty ratio, a 2.5V voltage reference source is used in the PWM control circuit, and the output voltage is set by the voltage division of the resistor. A primary voltage stabilizing circuit is added behind the booster circuit, so that the voltage stability of the circuit is good. The circuit has the advantages of flexible control, low cost, good stability of output voltage and difficult realization of other special chips.
The technical scheme for realizing the invention is as follows:
the utility model provides a direct current high voltage generator of micropower direct current low pressure input, its voltage stabilizing circuit who includes boost circuit and be connected with boost circuit which characterized in that: the boost circuit comprises a PWM controller, a first reference voltage source is connected with the PWM controller, the PWM controller is further connected with the boost circuit, the boost circuit is connected with a voltage stabilizing circuit, and the voltage stabilizing circuit is connected with a high voltage source.
The boost circuit comprises a power triode connected with the PWM controller, an energy storage inductor is connected with the power triode in parallel, the energy storage inductor is connected with a rectifying and filtering circuit, and the rectifying and filtering circuit is connected with a voltage stabilizing circuit.
The voltage stabilizing circuit is a series voltage stabilizing circuit.
In conclusion, the invention has the following beneficial effects:
the BOOST circuit of the BOOST topological structure is formed by adopting the power triode and the PWM controller, the output voltage is regulated to be stabilized at the set output by regulating the duty ratio, a 2.5V voltage reference source is used in the PWM control circuit, and the output voltage is set by the voltage division of the resistor. A primary voltage stabilizing circuit is added behind the booster circuit, so that the voltage stability of the circuit is good. The circuit has the advantages of flexible control, low cost, good stability of output voltage and difficult realization of other special chips.
Drawings
FIG. 1 is a schematic block diagram of a DC high voltage generator circuit with micropower DC low voltage input;
FIG. 2 is a voltage boost circuit of a DC high voltage generator with micro-power DC low voltage input;
fig. 3 is a voltage stabilizing circuit of a micropower direct-current low-voltage input direct-current high-voltage generator.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
The utility model provides a direct current high voltage generator of micropower direct current low pressure input, its voltage stabilizing circuit who includes boost circuit and be connected with boost circuit which characterized in that: the boost circuit comprises a PWM controller, a first reference voltage source is connected with the PWM controller, the PWM controller is further connected with the boost circuit, the boost circuit is connected with a voltage stabilizing circuit, and the voltage stabilizing circuit is connected with a high voltage source.
The BOOST circuit comprises a power triode connected with the PWM controller, an energy storage inductor is connected with the power triode in parallel, the energy storage inductor is connected with a rectifying and filtering circuit, the rectifying and filtering circuit is connected with a voltage stabilizing circuit, and further, as shown in figure 2, the BOOST circuit is composed of the power triode and the PWM controller. C30-C34, L9-L10, D8-D9 and Q4-Q5 jointly form a main booster circuit, U1 is a PWM controller, and output voltage can be regulated and stabilized at set output by regulating duty ratio. The PWM control circuit uses a 2.5V voltage reference source, and sets the output voltage to a certain value by voltage division of the R25-R29 resistors. U5 is a reference voltage source, and the reference voltage is 2.5V. In the PWM regulation process, the pulse frequency is set. Two paths of output of the U1 drive a switching triode together, and the switching triode belongs to a push-pull type PWM circuit.
The voltage regulator circuit is a series voltage regulator circuit, and as shown in fig. 3, the voltage regulator circuit is a voltage regulator circuit of a micropower direct-current low-voltage input direct-current high-voltage generator. In order to increase the stability of the high voltage, a further voltage stabilization design is carried out after boosting to a certain value, and a reference voltage source is also used. U7 is a reference voltage source, and the reference voltage is 2.5V. The left end of R35 is 5V voltage input, and the left end of R39 is the value after boosting, and is slightly higher than the required voltage value after actually boosting. R39, R40, Q9, R50, R49, FB5 are main circuit voltage outputs, and the traces are as short and thick as possible during PCB wiring.
In conclusion, the invention has the following beneficial effects:
the BOOST circuit of the BOOST topological structure is formed by adopting the power triode and the PWM controller, the output voltage is regulated to be stabilized at the set output by regulating the duty ratio, a 2.5V voltage reference source is used in the PWM control circuit, and the output voltage is set by the voltage division of the resistor. A primary voltage stabilizing circuit is added behind the booster circuit, so that the voltage stability of the circuit is good. The circuit has the advantages of flexible control, low cost, good stability of output voltage and difficult realization of other special chips.
Claims (1)
1. The utility model provides a direct current high voltage generator of micropower direct current low pressure input, its voltage stabilizing circuit who includes boost circuit and be connected with boost circuit which characterized in that: the boost circuit comprises a PWM controller, a first reference voltage source is connected with the PWM controller, the PWM controller is also connected with the boost circuit, the boost circuit is connected with a voltage stabilizing circuit, and the voltage stabilizing circuit is connected with a high voltage source;
the BOOST circuit comprises a power triode connected with a PWM controller, a BOOST circuit consisting of the power triode and the PWM controller, a capacitor C30-C34, an inductor L9-L10 diode D8-D9 and a power triode Q4-Q5 which jointly form a main BOOST circuit, U1 is the PWM controller, the output voltage can be regulated and stabilized at a set output by regulating the duty ratio, a 2.5V voltage reference source is used in the PWM control circuit, the output voltage is set to be a certain value through a resistor R25-R29, U5 is a first reference voltage source, the reference voltage is 2.5V, in the PWM regulation process, the pulse frequency is set, the two paths of output of the U1 jointly drive the switching triode, the BOOST circuit belongs to a push-pull type PWM circuit, the VCC end of U1 is connected with one end of the inductor L9 and one end of a capacitor C30, the other end of the capacitor C30 is grounded, and the other end of the inductor L9 is connected with the capacitor C31, One end of a capacitor C32 and an inductor L10, the other end of capacitors C31 and C32 are grounded, the other end of the inductor L10 is connected with anodes of diodes D8 and D9 and a drain of a power triode Q5, cathodes of D8 and D9 are connected with one ends of capacitors C33, C34 and C150, the other end of the capacitor C34 is grounded through a capacitor C53, the other end of the capacitor C33 is grounded through a capacitor C54, the other end of the C150 is grounded, a source of Q5 is grounded through a resistor R22, a gate of Q5 is connected with a collector of the power triode Q4, one ends of resistors R19 and R20, the other ends of resistors R19 and R20 are grounded, a source of Q4 is connected with one end of L10, and a base of Q4 is connected with a source of Q4 through a resistor R21;
the voltage stabilizing circuit is a series type voltage stabilizing circuit, is a voltage stabilizing circuit of a direct current high voltage generator with direct current low voltage input, and is further designed for stabilizing the voltage after boosting to a certain value in order to increase the stability of the high voltage, a reference voltage source is also used, U7 is a reference voltage source, the reference voltage is 2.5V, the voltage is higher than a required voltage value after actual boosting, one end of a resistor R39 is connected with the cathodes of diodes D8 and D9, the other end of the resistor R39 is connected with one end of a resistor R40 for the value after boosting, the other end of the resistor R40 is connected with a capacitor C39 and one ends of resistors R38 and R41, the other end of the capacitor C39 is grounded through a capacitor C50, the other end of the resistor R38 is connected with the anode of a diode D10, the cathode of the D10 is connected with the emitter of a triode Q6, the collector of Q6 is connected with one end of the resistor R37, the other end of the R37 is connected with the cathode of the U7, the base of the, a reference end of U7 is grounded through a capacitor C44, a resistor R45, R36 and a capacitor C38 in turn, a connection point of a resistor R36 and a capacitor C38 is connected with a base of Q6, the other end of R41 is connected with a base of a triode Q7, an emitter of Q7 is connected with the other end of R40, a collector of Q7 is connected with a base of a triode Q9 and one end of a resistor R43, the other end of the resistor R43 is grounded, a collector of the triode Q9 is connected with one ends of resistors R50 and R44, the other end of R44 is connected with an emitter of Q44 through a resistor R44, the other end of R44 outputs a main circuit voltage through a resistor R44 and a resistor FB 44 in turn, the other end of R44 is connected with a base of the triode Q44, an emitter of Q44 is connected with the other end of the resistor R44, a collector of Q44 is connected with one end of the resistor R44, the other end of the base of the resistor R44 is connected with the base of the FB 44, and the base of the resistor R44, the connection point of the resistor R49 and the resistor R50 is grounded through the resistors R48, R47 and R46 in sequence, the connection point of the resistor R47 and the resistor R46 is connected with one end of the capacitor C45, the other end of the capacitor C45 is connected with the other end of the resistor R37, and therefore wiring is short and thick during PCB wiring.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610479352.9A CN105978338B (en) | 2016-06-27 | 2016-06-27 | Micropower direct-current low-voltage input direct-current high-voltage generator |
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| CN201610479352.9A CN105978338B (en) | 2016-06-27 | 2016-06-27 | Micropower direct-current low-voltage input direct-current high-voltage generator |
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| CN105978338A CN105978338A (en) | 2016-09-28 |
| CN105978338B true CN105978338B (en) | 2020-09-04 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110074808A (en) * | 2019-04-30 | 2019-08-02 | 上海医乐信息科技有限公司 | New energy high pressure generator and new energy computer tomography equipment |
| CN112147564B (en) * | 2020-09-09 | 2023-11-10 | 浙江永泰隆电子股份有限公司 | High-precision direct-current voltage source |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101765269A (en) * | 2009-09-07 | 2010-06-30 | 海洋王照明科技股份有限公司 | LED drive circuit |
| CN102355133A (en) * | 2011-09-19 | 2012-02-15 | 东文高压电源（天津）有限公司 | High-voltage power supply circuit with wide-range input and multi-path isolated output |
| CN102695320A (en) * | 2011-03-24 | 2012-09-26 | 海洋王照明科技股份有限公司 | Constant current drive circuit |
| CN103428926A (en) * | 2012-05-23 | 2013-12-04 | 李家荣 | High-frequency electromagnetic heating circuit system of electric oven |
| CN203872060U (en) * | 2014-04-02 | 2014-10-08 | 深圳市贵晶集成科技有限公司 | High voltage generator |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100476202B1 (en) * | 2002-06-25 | 2005-03-10 | 현대자동차주식회사 | A method for preventing and diagnosing an arm-short of bi-directional dc/dc converter |
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2016
- 2016-06-27 CN CN201610479352.9A patent/CN105978338B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101765269A (en) * | 2009-09-07 | 2010-06-30 | 海洋王照明科技股份有限公司 | LED drive circuit |
| CN102695320A (en) * | 2011-03-24 | 2012-09-26 | 海洋王照明科技股份有限公司 | Constant current drive circuit |
| CN102355133A (en) * | 2011-09-19 | 2012-02-15 | 东文高压电源（天津）有限公司 | High-voltage power supply circuit with wide-range input and multi-path isolated output |
| CN103428926A (en) * | 2012-05-23 | 2013-12-04 | 李家荣 | High-frequency electromagnetic heating circuit system of electric oven |
| CN203872060U (en) * | 2014-04-02 | 2014-10-08 | 深圳市贵晶集成科技有限公司 | High voltage generator |
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| CN105978338A (en) | 2016-09-28 |
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