CN111103916A - Programmable voltage regulator - Google Patents
Programmable voltage regulator Download PDFInfo
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- CN111103916A CN111103916A CN201911348247.1A CN201911348247A CN111103916A CN 111103916 A CN111103916 A CN 111103916A CN 201911348247 A CN201911348247 A CN 201911348247A CN 111103916 A CN111103916 A CN 111103916A
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- resistance
- resistor
- programmable voltage
- voltage regulator
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
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Abstract
The invention discloses a programmable voltage stabilizer which comprises an adjustable three-terminal voltage stabilizer, a fixed value resistor and a resistor module, wherein the fixed value resistor and the resistor module are connected in series at the output end of the adjustable three-terminal voltage stabilizer, the reference voltage of the adjustable three-terminal voltage stabilizer is loaded on the fixed value resistor, and the resistance value of the resistor module can be adjusted in a programmable way; the decoding unit is used for decoding the resistance parameters, and the decoded output is used for controlling the switch array; a resistor network configured to adjust an output resistance value by the switch array. The programmable voltage stabilizer can directly realize variable stable voltage output by user programming, controls different voltage outputs in real time in circuit design or circuit debugging needing to use various power supplies, and has the advantages of simple operation and easy control.
Description
Technical Field
The invention relates to the field of power electronics, in particular to a three-terminal regulator with online programmable control output.
Background
The voltage stabilizer is a device for voltage conversion, is most commonly applied to a low-power three-terminal voltage stabilizer, and has the advantages of high output voltage, small volume, few external elements, high reliability and the like, so that the voltage stabilizer is more and more applied to communication equipment, automobile electronic products, industry and medical instrument equipment.
Because various different power supplies are often required in circuit design, the use of the three-terminal adjustable voltage regulator brings great convenience to circuit design and implementation. The three-terminal adjustable voltage stabilizer is usually used for calculating the resistance in an output circuit of the voltage stabilizer through output voltage, and the circuit is realized by using a fixed value resistor after the resistance is determined. On the other hand, in the process of debugging circuits, especially some high-voltage circuits, debugging is generally started from a relatively moderate low voltage, and various input voltages are needed. In the past, when a three-terminal adjustable voltage regulator is used for outputting variable voltage, the variable voltage is realized by using a sliding resistor or a digital variable resistor with a key counter, but the adjusting mode needs to manually change the resistor so as to obtain different voltage outputs, and the operation is complicated and inconvenient.
Disclosure of Invention
The invention aims to provide a programmable voltage stabilizer which can realize online adjustable voltage stabilization output under the condition of not changing hardware.
In order to solve the technical problem, the invention provides a programmable voltage stabilizer which comprises an adjustable three-terminal voltage stabilizer, a fixed value resistor and a resistor module, wherein the fixed value resistor and the resistor module are connected in series at the output end of the adjustable three-terminal voltage stabilizer, and the reference voltage of the adjustable three-terminal voltage stabilizer is loaded on the fixed value resistor; the resistance value of the resistance module is adjusted in a programmable way and comprises
The programming logic interface is used for receiving an operation instruction generated by programming and analyzing a resistance parameter according to the operation instruction;
the decoding unit is used for decoding the resistance parameters, and the decoded output is used for controlling the switch array;
a resistor network configured to adjust an output resistance value by the switch array.
In a preferred embodiment of the present invention, the resistance module further comprises a memory unit, wherein the memory unit comprises a high speed memory and a nonvolatile memory; the storage unit accepts the operation of a programming logic interface, writes the data in the high-speed memory into the nonvolatile memory and reads the data in the nonvolatile memory into the high-speed memory; the resistance parameter analyzed by the programming logic interface is arranged in the high-speed memory.
In a preferred embodiment of the present invention, the high speed memory is a RAM or a register; the nonvolatile memory is EEProm or Flash.
In a preferred embodiment of the present invention, the system further comprises a programming control interface logic unit, wherein the programming control interface logic unit is in protocol communication with the programming logic interface, and is configured to run a control program to generate the operation instruction.
In a preferred embodiment of the present invention, the programming control interface logic unit is implemented by a single chip, an ARM, or an FPGA.
In a preferred embodiment of the present invention, the decoding unit further includes a one-out-of-multiple decoder or a BCD decoder, and the output of the one-out-of-multiple decoder after decoding controls a switch of the switch array to be turned on singly; and the output of the BCD decoder after decoding controls a plurality of switches of the switch array to be conducted.
In a preferred embodiment of the present invention, the resistor network is a series network, which includes a plurality of adjusting resistors connected in series, and each adjusting resistor is connected in parallel with a set of electronic switches; all electronic switches make up the switch array.
In a preferred embodiment of the present invention, the resistor network is a parallel network, which includes a plurality of adjusting resistors, the adjusting resistors are connected in parallel, and each adjusting resistor is connected in series with a set of electronic switches; all electronic switches make up the switch array.
In a preferred embodiment of the present invention, the resistor network is a series-parallel network, which includes a first resistor unit and a second resistor unit; the first resistance unit comprises a plurality of first adjusting resistors which are connected in parallel, and each first adjusting resistor is connected with an electronic switch in series; all the electronic switches form the switch array; the second resistance unit comprises a plurality of second adjusting resistors which are connected in series; a second adjusting resistor is connected between two adjacent first adjusting resistors.
In a preferred embodiment of the present invention, the electronic switch is a MOS transistor or a relay.
The invention has the beneficial effects that:
the programmable voltage stabilizer can directly realize variable stable voltage output by user programming, controls different voltage outputs in real time in circuit design or circuit debugging needing to use various power supplies, and has the advantages of simple operation and easy control.
Drawings
FIG. 1 is a block diagram of the structure of a programmable voltage regulator in a preferred embodiment of the present invention;
FIG. 2 is a block diagram of a resistor module according to a preferred embodiment of the present invention;
FIG. 3 is a circuit diagram of a resistor network according to a first embodiment;
FIG. 4 is a circuit diagram of a resistor network according to a second embodiment;
fig. 5 is a circuit diagram of a resistor network according to a third embodiment.
The reference numbers in the figures illustrate:
10-an adjustable three-terminal regulator;
20-resistor module, 21-programming logic interface, 22-decoding unit, 23-resistor network, 24-storage unit, 241-high-speed memory and 242-nonvolatile memory;
30-programming the control interface logic unit.
Detailed Description
The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.
Examples
The embodiment discloses a programmable regulator, which is shown in fig. 1-2, and includes an adjustable three-terminal regulator 10, a constant value resistor R, a resistor module 20, and a programming control interface logic unit 30. The constant value resistor R and the resistor module 20 are connected in series at the output end of the adjustable three-terminal regulator 10, and the reference voltage V of the adjustable three-terminal regulator 10refThe programming control interface logic unit 30 is loaded on the constant value resistor R and is used for programming and controlling the resistance value R of the resistance adjusting module 20adj. Reference voltage V of adjustable three-terminal regulator 10refThe constant value resistor R generates current when loaded on the constant value resistor R, and the constant value resistor R and the resistor module 20 generate the output voltage V of the adjustable three-terminal voltage regulatoro，
According to the formula, it can be seen that the resistance value R of the resistor module 20 is adjustedadjThe output voltage V of the adjustable three terminal regulator 10 can be changedo. The resistance value of the fixed resistor R needs to be determined according to the model selection of the adjustable three-terminal regulator 10, and the fixed resistor R cannot be selected to be too large, for example, 100 Ω, in order to ensure the performance of the output voltage of the adjustable three-terminal regulator 10.
In the technical solution of this embodiment, the resistance value of the resistor module 20 can be adjusted by programming, as shown in fig. 2, and includes a programming logic interface 21, a decoding unit 22, a resistor network 23, and a storage unit 24.
The program control interface logic unit 30 runs a control program to generate an operation command, and a user inputs a desired output voltage into the program control interface logic unit 30, where the user inputs the command through the program. Generally, the programming control interface logic unit 30 is implemented by a single chip, an ARM, or an FPGA, and the programming control interface logic unit 30 runs a control program to generate an operation instruction, where the operation instruction carries output voltage information desired by a user.
The programming logic interface 21 and the programming control interface logic unit 30 communicate with each other in a protocol, the communication protocol adopted by the protocol communication between the programming logic interface 21 and the programming control interface logic unit 30 includes I2C and SPI, the programming logic interface 21 receives the operation command sent by the programming control interface logic unit 30 in a mode specified by the protocol, and analyzes the resistance parameter according to the operation command.
The decoding unit 22 is configured to decode the resistance parameter, and the decoded output is used to control the switch array;
the resistor network 23 is configured to adjust the output resistance value by the switch array, so that the resistor network 23 generates the resistance value specified by the programming control interface logic unit 30, where the output resistance value of the resistor network 23 is the resistance R of the resistor moduleadj。
In the technical solution of this embodiment, the decoding logic of the decoding unit 22 needs to match the design of the resistor network 23, and the decoded output signal may be single-on or multiple-on of the switch array in the resistor network 23. In one embodiment, the decoding unit 22 uses a one-out-of-multiple decoder (e.g., a 1-out-of-32 decoder), and the output of the one-out-of-multiple decoder after decoding controls the switches of the switch array to be turned on singly. In the second technical solution, the decoding unit 22 uses a BCD decoder, and the decoded output of the BCD decoder controls the switches of the switch array to be turned on.
Referring to fig. 2, the storage unit 24 includes a high-speed memory 241 and a nonvolatile memory 242; here, the high-speed memory 214 is a memory with a storage speed of 10MB/s or more, and when in actual use, the high-speed memory 214 is a RAM or a register; the nonvolatile memory 242 is EEProm or Flash. The resistance parameter analyzed by the program logic interface 21 is set in the high speed memory 241. The memory unit 24 receives an operation of the program logic interface 21, writes data in the high-speed memory 241 into the nonvolatile memory 242, and reads data in the nonvolatile memory 242 into the high-speed memory 241. The resistance parameter settings analyzed by the programming logic interface 21 are called in the high-speed memory 214 and stored in the non-volatile memory 242, and when the power is turned on, the data in the non-volatile memory 242 is automatically read into the high-speed memory 241, so that the finally stored voltage output can be maintained.
Referring to fig. 3, the resistor network according to the first technical solution of the present embodiment is a series network, and includes a plurality of adjusting resistors (R)1、R2、R3、.....RN) The plurality of adjusting resistors are connected in series, and each adjusting resistor is connected with a group of electronic switches in parallel; all electronic switches make up the switch array described above. The electronic switch is preferably a MOS transistor or a relay. When using one-out-of-many decoding, the resistor R can be selectively adjusted1＝R2＝R3......＝RN(ii) a When the BCD decoding is used, the number of the adjusting resistors is a multiple of 4, every 4 adjusting resistors are grouped into a group, and the size of each group is a multiple value of 1,2,4 and 8, for example, R1, R2, R3 and R4 are grouped into a group, so that the condition that R4 is 2R3, 4R2 is 8R1 is satisfied.
Referring to fig. 4, the resistor network in the second technical solution of the present embodiment is a parallel network, and includes a plurality of adjusting resistors (R)1、R2、R3、.....RN) The plurality of adjusting resistors are connected in parallel, and each adjusting resistor is connected with a group of electronic switches in series; all electronic switches constitute the switch array, and the electronic switches are preferably MOS transistors or relays.
Referring to fig. 5, a resistor network according to a third technical solution of the present embodiment is a series-parallel network, and includes a first resistor unit and a second resistor unit; the first resistance unit includes a plurality of first adjusting resistances (R)1、R2、R3、.....RN) The first adjusting resistors are connected in parallel, and each first adjusting resistor is connected with an electronic switch in series; all the electronic switches form the switch array; the second resistance unit includes a plurality of second adjusting resistances (R)1’、R2’、R3’、.....RN-1') of the above-mentioned plurality of second adjustmentsThe resistors are connected in series; a second adjusting resistor is connected between two adjacent first adjusting resistors, for example, the first adjusting resistor R1 is connected in parallel with the second adjusting resistor R2, and the second adjusting resistor R1' connecting the first adjusting resistor R1 and the second adjusting resistor R2. The electronic switch is preferably a MOS transistor or a relay.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.
Claims (10)
1. The utility model provides a programmable voltage stabilizer, includes adjustable three terminal regulator, definite value resistance and resistance module establish ties at adjustable three terminal regulator's output, adjustable three terminal regulator's reference voltage loading is in on the definite value resistance, its characterized in that: the resistance value of the resistance module is adjusted in a programmable way and comprises
The programming logic interface is used for receiving an operation instruction generated by programming and analyzing a resistance parameter according to the operation instruction;
the decoding unit is used for decoding the resistance parameters, and the decoded output is used for controlling the switch array;
a resistor network configured to adjust an output resistance value by the switch array.
2. The programmable voltage regulator of claim 1, wherein: the resistance module further comprises a storage unit, wherein the storage unit comprises a high-speed memory and a nonvolatile memory; the storage unit accepts the operation of a programming logic interface, writes the data in the high-speed memory into the nonvolatile memory and reads the data in the nonvolatile memory into the high-speed memory; the resistance parameter analyzed by the programming logic interface is arranged in the high-speed memory.
3. The programmable voltage regulator of claim 2, wherein: the high-speed memory is a RAM or a register; the nonvolatile memory is EEProm or Flash.
4. The programmable voltage regulator of claim 1, wherein: the system also comprises a programming control interface logic unit, wherein the programming control interface logic unit is in protocol communication with the programming logic interface and is used for operating a control program to generate the operation instruction.
5. The programmable voltage regulator of claim 4, wherein: the programming control interface logic unit is realized by a singlechip, an ARM or an FPGA.
6. The programmable voltage regulator of claim 1, wherein: the decoding unit comprises a one-out-of-multiple decoder or a BCD decoder, and the output of the decoded one-out-of-multiple decoder controls the switch of the switch array to be singly conducted; and the output of the BCD decoder after decoding controls a plurality of switches of the switch array to be conducted.
7. The programmable voltage regulator of any of claims 1-6, wherein: the resistance network is a series network and comprises a plurality of adjusting resistors which are connected in series, and each adjusting resistor is connected with a group of electronic switches in parallel; all electronic switches make up the switch array.
8. The programmable voltage regulator of any of claims 1-6, wherein: the resistance network is a parallel network and comprises a plurality of adjusting resistors which are connected in parallel, and each adjusting resistor is connected with a group of electronic switches in series; all electronic switches make up the switch array.
9. The programmable voltage regulator of any of claims 1-6, wherein: the resistance network is a series-parallel network and comprises a first resistance unit and a second resistance unit; the first resistance unit comprises a plurality of first adjusting resistors which are connected in parallel, and each first adjusting resistor is connected with an electronic switch in series; all the electronic switches form the switch array; the second resistance unit comprises a plurality of second adjusting resistors which are connected in series; a second adjusting resistor is connected between two adjacent first adjusting resistors.
10. A programmable voltage regulator as claimed in claim 7, 8 or 9, wherein: the electronic switch is an MOS tube or a relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911348247.1A CN111103916A (en) | 2019-12-24 | 2019-12-24 | Programmable voltage regulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911348247.1A CN111103916A (en) | 2019-12-24 | 2019-12-24 | Programmable voltage regulator |
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| CN111103916A true CN111103916A (en) | 2020-05-05 |
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| CN201911348247.1A Pending CN111103916A (en) | 2019-12-24 | 2019-12-24 | Programmable voltage regulator |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5852737A (en) * | 1995-04-24 | 1998-12-22 | National Semiconductor Corporation | Method and apparatus for operating digital static CMOS components in a very low voltage mode during power-down |
| CN2881755Y (en) * | 2006-03-02 | 2007-03-21 | 苏州宇达电通有限公司 | Digital adjustable voltage-stabilizing power supply circuit |
| CN101847476A (en) * | 2009-03-23 | 2010-09-29 | 辉芒微电子（深圳）有限公司 | Digital potentiometer and control method thereof |
| CN101873120A (en) * | 2009-04-27 | 2010-10-27 | 武汉市创佳源电子有限公司 | Application of electronic potentiometer module in direct current stabilized voltage power supply |
| CN102455724A (en) * | 2010-10-20 | 2012-05-16 | 许文昊 | Programmable voltage stabilizer based on digital potentiometer |
-
2019
- 2019-12-24 CN CN201911348247.1A patent/CN111103916A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5852737A (en) * | 1995-04-24 | 1998-12-22 | National Semiconductor Corporation | Method and apparatus for operating digital static CMOS components in a very low voltage mode during power-down |
| CN2881755Y (en) * | 2006-03-02 | 2007-03-21 | 苏州宇达电通有限公司 | Digital adjustable voltage-stabilizing power supply circuit |
| CN101847476A (en) * | 2009-03-23 | 2010-09-29 | 辉芒微电子（深圳）有限公司 | Digital potentiometer and control method thereof |
| CN101873120A (en) * | 2009-04-27 | 2010-10-27 | 武汉市创佳源电子有限公司 | Application of electronic potentiometer module in direct current stabilized voltage power supply |
| CN102455724A (en) * | 2010-10-20 | 2012-05-16 | 许文昊 | Programmable voltage stabilizer based on digital potentiometer |
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