CN108282161A - A kind of reduction regulation circuit of automatic adjustment working frequency - Google Patents
A kind of reduction regulation circuit of automatic adjustment working frequency Download PDFInfo
- Publication number
- CN108282161A CN108282161A CN201810073405.6A CN201810073405A CN108282161A CN 108282161 A CN108282161 A CN 108282161A CN 201810073405 A CN201810073405 A CN 201810073405A CN 108282161 A CN108282161 A CN 108282161A
- Authority
- CN
- China
- Prior art keywords
- working frequency
- circuit
- frequency
- adjusting
- outputs
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001514 detection method Methods 0.000 claims abstract description 11
- 230000001105 regulatory effect Effects 0.000 claims description 18
- 238000010586 diagram Methods 0.000 description 3
- 230000005669 field effect Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
- H03K19/0175—Coupling arrangements; Interface arrangements
- H03K19/0185—Coupling arrangements; Interface arrangements using field effect transistors only
- H03K19/018507—Interface arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Physics & Mathematics (AREA)
- Computing Systems (AREA)
- General Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Abstract
The present invention provides a kind of reduction regulation circuit of automatic adjustment working frequency, belongs to circuit work frequency regulation technology field, the invention mainly comprises 2 parts, 1）Voltage detection circuit, 2）Frequency adjustment circuit；By the detecting to output voltage, the resistance value of working frequency interface access is adjusted by circuit for detecting in time.It is simple in structure, Auto-Sensing, reliability height.
Description
Technical Field
The invention relates to a circuit working frequency adjusting technology, in particular to a voltage reduction adjusting circuit capable of automatically adjusting working frequency.
Background
The existing voltage reduction regulating circuit sets the working frequency of the circuit during working by means of an interface external resistor, once a corresponding resistor is selected, the working frequency is fixed, the output voltage at the rear end is changed violently, the circuit cannot respond in time when required to make a quick response, and huge hidden dangers are brought to the reliability and the stability of the system.
Disclosure of Invention
The invention provides a step-down regulating circuit capable of automatically regulating working frequency, aiming at the problems that in the prior art, the working frequency is fixed to correspond to all output environments, the corresponding working frequency cannot be adopted according to different conditions, and huge hidden dangers are brought to the reliability and stability of a system. The working frequency is automatically adjusted, and the reliability is high.
The technical scheme of the invention is as follows:
a voltage reduction regulating circuit capable of automatically regulating working frequency,
mainly comprises 2 parts, 1) a voltage detection circuit, 2) a frequency regulation circuit; by detecting the output voltage, the resistance value accessed by the working frequency interface is adjusted in time through the detection circuit.
Wherein,
1) the voltage detection circuit-is composed of resistors R2& R3 and an operational amplifier M1, and compares the output voltage Vout through the operational amplifier M1, when Vout is higher than the threshold value, M1 outputs low level, and when Vout is lower than the threshold value M2 outputs high level;
2) the frequency adjusting circuit consists of a P-mosfet Q1 and a resistor R1, and the aim of adjusting the working frequency is achieved by adjusting whether the R1 is connected with the Rfe in parallel or not through the on and off of the P-mosfet Q1 and adjusting the resistance value of the working frequency interface access resistor.
Tong (Chinese character of 'tong')For treatingP-mosfet Q1 is used for adjusting whether the resistor R1 is connected with the working frequency setting interface of the buck adjusting circuit or not, when M1 outputs a low level, Q1 is conducted, R1 is connected with the working frequency setting interface of the buck adjusting circuit and connected with Rfe in parallel, so that the working frequency is at a lower level, namely 300 + 400K, when M1 outputs a high level, Q1 is cut off, and R1 is disconnected from being connected with Rfe in parallel, so that the working frequency is at a higher level, namely 600 + 800K.
The invention has the advantages that
The invention has the characteristics of simple structure, automatic detection, high reliability, capability of automatically adjusting the working frequency according to the output state and random adjustment, and can thoroughly solve the hidden danger of system stability and reliability caused by the fact that the fixed working frequency cannot adopt the corresponding reaction speed to the emergency situation.
Drawings
FIG. 1 is a functional block diagram of the present invention;
FIG. 2 is a detailed circuit diagram of the present invention;
fig. 3 is a flow chart of the operation of the present invention.
Detailed Description
The invention is explained in more detail below:
from the circuit diagram, the voltage reduction regulating circuit for automatically regulating the working frequency mainly comprises 2 parts, 1) a voltage detection circuit and 2) a frequency regulating circuit; by detecting the output voltage, the resistance value accessed by the working frequency interface is adjusted in time through the detection circuit.
As shown in the figure, the first and second,
1) the voltage detection circuit is composed of resistors R2& R3 and an operational amplifier M1, and compares the output voltage Vout with the operational amplifier M1, wherein M1 outputs a low level when Vout is higher than a threshold value, and outputs a high level when Vout is lower than a threshold value M2.
2) The frequency adjusting circuit consists of a P-mosfet Q1 and a resistor R1, and the working frequency interface of the voltage-reducing adjusting circuit is adjusted to be connected with the resistance value of the resistor through the on and off adjustment of Q1 to adjust whether R1 is connected with Rfe in parallel or not, so that the aim of adjusting the working frequency is fulfilled.
Whether a resistor R1 is connected with an operating frequency setting interface of the buck regulating circuit or not is regulated through a P-mosfet Q1, when M1 outputs a low level, Q1 is conducted, R1 is connected with the operating frequency setting interface of the buck regulating circuit and connected with Rfe in parallel, so that the operating frequency is at a lower level, when M1 outputs a high level, Q1 is cut off, and R1 is disconnected from being connected with Rfe in parallel, so that the operating frequency is at a higher level.
The noun explains:
p-mosfet: p-channel enhancement type metal-oxide semiconductor field effect transistor
Frequency: the frequency setting interface of the voltage reduction regulation switch circuit is characterized in that the larger the resistance value of the connected resistor is, the higher the working frequency is, and the faster the response is
Rfe: the buck regulator circuit frequency sets the resistance.
Claims (3)
1. A voltage reduction regulating circuit for automatically regulating working frequency is characterized in that,
mainly comprises 2 parts, 1) a voltage detection circuit, 2) a frequency regulation circuit; by detecting the output voltage, the resistance value accessed by the working frequency interface is adjusted in time through the detection circuit.
2. The buck regulation circuit of claim 1,
wherein,
1) the voltage detection circuit-is composed of resistors R2& R3 and an operational amplifier M1, and compares the output voltage Vout through the operational amplifier M1, when Vout is higher than the threshold value, M1 outputs low level, and when Vout is lower than the threshold value M2 outputs high level;
2) the frequency adjusting circuit consists of a P-mosfet Q1 and a resistor R1, and the aim of adjusting the working frequency is achieved by adjusting whether the R1 is connected with the Rfe in parallel or not through the on and off of the P-mosfet Q1 and adjusting the resistance value of the working frequency interface access resistor.
3. The buck regulation circuit of claim 2,
whether the resistor R1 is connected with the working frequency setting interface of the buck regulating circuit or not is regulated through the P-mosfet Q1, when the M1 outputs a low level, the Q1 is conducted, the R1 is connected with the working frequency setting interface of the buck regulating circuit and is connected with the Rfe in parallel, so that the working frequency is at a lower level, namely 300-800K, when the M1 outputs a high level, the Q1 is cut off, and the R1 is disconnected with the Rfe in parallel, so that the working frequency is at a higher level, namely 600-800K.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810073405.6A CN108282161A (en) | 2018-01-25 | 2018-01-25 | A kind of reduction regulation circuit of automatic adjustment working frequency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810073405.6A CN108282161A (en) | 2018-01-25 | 2018-01-25 | A kind of reduction regulation circuit of automatic adjustment working frequency |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108282161A true CN108282161A (en) | 2018-07-13 |
Family
ID=62805065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810073405.6A Pending CN108282161A (en) | 2018-01-25 | 2018-01-25 | A kind of reduction regulation circuit of automatic adjustment working frequency |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108282161A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110830397A (en) * | 2019-11-04 | 2020-02-21 | 珠海格力电器股份有限公司 | HBS-based attenuation resistor self-adaption method, communication circuit and multi-connected unit |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5793730A (en) * | 1980-12-03 | 1982-06-10 | Hitachi Ltd | Signal level conversion circuit |
| JPH08263200A (en) * | 1995-03-20 | 1996-10-11 | Fujitsu Ltd | Coordinate input device |
| CN101453163A (en) * | 2007-11-30 | 2009-06-10 | 英业达股份有限公司 | Apparatus and method for regulating working frequency of step-down conversion circuit by detection current |
| US20110133771A1 (en) * | 2009-12-03 | 2011-06-09 | Alma Stephenson Anderson | Edge rate suppression for open drain buses |
| CN102208800A (en) * | 2011-06-09 | 2011-10-05 | 国网电力科学研究院 | Adaptive insulated gate bipolar transistor (IGBT) series-connection voltage-sharing circuit with overcurrent protection function |
| CN107204613A (en) * | 2017-08-04 | 2017-09-26 | 郑州云海信息技术有限公司 | A kind of over-pressure safety device and method |
| CN107425718A (en) * | 2017-08-10 | 2017-12-01 | 郑州云海信息技术有限公司 | A kind of DC decompression adjusts circuit structure |
-
2018
- 2018-01-25 CN CN201810073405.6A patent/CN108282161A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5793730A (en) * | 1980-12-03 | 1982-06-10 | Hitachi Ltd | Signal level conversion circuit |
| JPH08263200A (en) * | 1995-03-20 | 1996-10-11 | Fujitsu Ltd | Coordinate input device |
| CN101453163A (en) * | 2007-11-30 | 2009-06-10 | 英业达股份有限公司 | Apparatus and method for regulating working frequency of step-down conversion circuit by detection current |
| US20110133771A1 (en) * | 2009-12-03 | 2011-06-09 | Alma Stephenson Anderson | Edge rate suppression for open drain buses |
| CN102208800A (en) * | 2011-06-09 | 2011-10-05 | 国网电力科学研究院 | Adaptive insulated gate bipolar transistor (IGBT) series-connection voltage-sharing circuit with overcurrent protection function |
| CN107204613A (en) * | 2017-08-04 | 2017-09-26 | 郑州云海信息技术有限公司 | A kind of over-pressure safety device and method |
| CN107425718A (en) * | 2017-08-10 | 2017-12-01 | 郑州云海信息技术有限公司 | A kind of DC decompression adjusts circuit structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110830397A (en) * | 2019-11-04 | 2020-02-21 | 珠海格力电器股份有限公司 | HBS-based attenuation resistor self-adaption method, communication circuit and multi-connected unit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5014194B2 (en) | Voltage regulator | |
| CN113110694B (en) | Low dropout regulator circuit with current surge suppression | |
| US9785165B2 (en) | Voltage regulator with improved line regulation transient response | |
| US8242760B2 (en) | Constant-voltage circuit device | |
| JP5078866B2 (en) | Voltage regulator | |
| US7821328B2 (en) | Dynamic charge pump system for front end protection circuit | |
| US7580271B2 (en) | Apparatus and method for suppressing the input current inrush for a voltage converter in a pre-charge stage | |
| EP2887174B1 (en) | CC-CV method to control the startup current for LDO | |
| KR102187403B1 (en) | Voltage regulator | |
| CN108021170A (en) | Voltage regulating circuit and control method thereof | |
| CN111742490B (en) | Adaptive voltage clamp and related method | |
| TWI708464B (en) | Power circuit | |
| JP2016134084A (en) | Voltage regulator | |
| EP3300235A2 (en) | Voltage regulator | |
| JP2006139673A (en) | Voltage regulator | |
| CN108282161A (en) | A kind of reduction regulation circuit of automatic adjustment working frequency | |
| KR20140109830A (en) | Voltage regulator | |
| CN103324237B (en) | Low dropout regulator (LDO) transient response enhancing circuit based on voltage induction | |
| CN109683648B (en) | LDO circuit | |
| KR20220131063A (en) | Low-dropout regulator | |
| JP2010136506A (en) | Dc/dc converter | |
| CN115756081A (en) | Voltage stabilizing circuit based on current feedback | |
| CN108258904A (en) | Direct current power supply and power supply method thereof | |
| CN108702091B (en) | Method for adjusting energy efficiency of terminal power supply and terminal | |
| JP5640441B2 (en) | Semiconductor integrated circuit for DC power supply and regulator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180713 |
|
| RJ01 | Rejection of invention patent application after publication |