CN101976945A - Switch type buck regulator circuit - Google Patents
Switch type buck regulator circuit Download PDFInfo
- Publication number
- CN101976945A CN101976945A CN 201010528578 CN201010528578A CN101976945A CN 101976945 A CN101976945 A CN 101976945A CN 201010528578 CN201010528578 CN 201010528578 CN 201010528578 A CN201010528578 A CN 201010528578A CN 101976945 A CN101976945 A CN 101976945A
- Authority
- CN
- China
- Prior art keywords
- comparator
- chip
- circuit
- voltage
- input
- 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
Images
Landscapes
- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
Abstract
The invention relates to a switch type buck regulator circuit, comprising a voltage input end, a voltage output end, a chip and peripheral circuit elements. The chip comprises a switch element, a trigger, a comparator and a reference voltage source, wherein the trigger outputs a control signal for controlling the switch element to be switched on or off, a reference voltage of the reference voltage source is input into the positive end of the comparator, and the signal output end of the comparator and the output end of an oscillator are respectively connected with the input ends of the trigger. The switch type buck regulator circuit is characterized in that the chip also internally comprises a current-limiting resistor (Rsc), a divider resistor (R1), a divider resistor (R2) and a charging and discharging capacitor (CT) of the oscillator which are all integrated in the chip so that four peripheral elements are correspondingly reduced in a peripheral circuit, the circuit cost is decreased, the chip has stronger market competitiveness, and the labor cost for making a PCB (Printing Circuit Board) can be decreased by using less peripheral elements.
Description
Technical field
The present invention relates to a kind of semiconductor integrated circuit, relate in particular to a kind of switching mode lowering and stabilizing blood pressure device circuit.
Background technology
In many cases, general electric power (as civil power) needs just can meet through conversion the needs of use.For example, exchange and convert direct current to, high voltage becomes low-voltage.In order to reach the conversion purpose, means are various.In a broad sense, all with semiconductor power device as switch, a kind of power supply modality conversion all is called Switching Converter Topologies for the main circuit of another form; Control closed-loop stabilization output and have the protection link then to claim Switching Power Supply with automatic during transformation.
General switching mode lowering and stabilizing blood pressure device as shown in Figure 1, operation principle is as follows: when switching device Q1 conducting, the electric current of power supply flows through from inductance L through Q1, the linear increase of inductive current, when inductive current during greater than output current, output capacitance Co is in charged state, and Vout rises, when the dividing potential drop of Vout on R1 during greater than the chip internal benchmark, chip internal control signal will make switching tube Q1 end.After Q1 ends, use capacitor C o and be in discharge condition, be lower than the chip internal benchmark up to the dividing potential drop of output voltage V out on R1, when the next rising edge of internal clock signal arrived, output capacitance Co charging was given in switch Q1 conducting once more again.
As shown in Figure 1, R1, R2 can adjust output voltage for the output divider resistance; Rsc is a short-circuit protection resistance, can limit output current; CT is the oscillator charge and discharge capacitance.Numerous peripheral cells makes circuit cost than higher, makes circuit be restricted in to the relatively responsive application of cost at some.
Summary of the invention
The object of the present invention is to provide a kind of cost that reduces circuit, make chip more competitive switching mode lowering and stabilizing blood pressure device circuit on market.
Technical scheme of the present invention is, a kind of switching mode lowering and stabilizing blood pressure device circuit, comprise voltage input end, voltage output end, chip and peripheral circuit element, described chip comprises switch element, the output control switch element by or the trigger of the control signal of conducting, comparator, reference voltage source, the reference voltage of reference voltage source is input to the anode of comparator, the signal output part of comparator and the output of oscillator are connected to the input of trigger, it is characterized in that: also comprise current-limiting resistance Rsc in the described chip, divider resistance R1, divider resistance R2 and oscillator charge and discharge capacitance CT.
Branch pressure voltage on the described divider resistance R1 feeds back to the negative terminal of comparator.
Be connected with an AND circuit between the signal output part of described comparator and the input of trigger, another input of AND circuit links to each other with the output of oscillator.
Described peripheral circuit element comprises the voltage stabilizing didoe of the protection pressurizer that is connected voltage output end.
The invention has the beneficial effects as follows: current-limiting resistance Rsc,, divider resistance R1, divider resistance R2 and oscillator charge and discharge capacitance CT be integrated into chip internal, therefore peripheral circuit has reduced by four peripheral cells accordingly, make the cost of circuit be minimized, and make chip on market, have competitiveness more, and the minimizing of peripheral cell also can be minimized so that make the cost of labor of PCB version.
Description of drawings
Fig. 1 is traditional switching mode lowering and stabilizing blood pressure device circuit;
Fig. 2 is a circuit diagram of the present invention.
Embodiment
Below, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
As shown in Figure 2, a kind of switching mode voltage regulator circuit, comprise voltage input end Vin, voltage output end Vout, chip and peripheral circuit element, described chip comprises switch element Q1, trigger, AND circuit, oscillator, comparator and reference voltage source, and the reference voltage of reference voltage source is input to the anode of comparator; The output signal of comparator is input to the input of AND circuit, another input of AND circuit links to each other with the output of oscillator, the signal output part of AND circuit and the output of oscillator are connected to the input of trigger, and the control signal driving switch element Q1 of trigger ends or conducting; Described chip also comprises the electric current and the oscillator charge and discharge capacitance CT of the current-limiting resistance Rsc restriction output that is connected voltage input end, the electric current of output is input to oscillator and switch element Q1, voltage output end is in series with divider resistance R1 and divider resistance R2, can adjust output voltage, divider resistance R1 and divider resistance R2 are also included within the described chip, and the branch pressure voltage on the described divider resistance R1 feeds back to the negative terminal of comparator; Described peripheral circuit element comprises the voltage stabilizing didoe D1 of the protection pressurizer that is connected voltage output end;
Current-limiting resistance Rsc,, divider resistance R1, divider resistance R2 and oscillator charge and discharge capacitance CT be integrated into chip internal, therefore peripheral circuit has reduced by four peripheral cells accordingly, make the cost of circuit be minimized, and make chip on market, have competitiveness more, and the minimizing of peripheral cell also can be minimized so that make the cost of labor of PCB version;
According to price in the market, Rsc, the price summation of divider resistance R1, divider resistance R2 and four peripheral cells of oscillator charge and discharge capacitance CT is about 2～3 fens RMB, and on the market through the circuit price before improvement be approximately 1 jiao 2 minutes, can reduce about 20% cost through the later circuit of improvement like this; On the one hand, peripheral cell quantity reduces to four by eight, and cost of labor has also been saved half, and in the 21 century that human cost increases day by day, the meaning of saving human cost more seems great;
Operation principle is as follows: when switch element Q1 conducting, the electric current of power supply flows through from inductance L through Q1, the linear increase of inductive current, when inductive current during greater than output current, output capacitance Co is in charged state, output voltage V out rises, and when the branch pressure voltage of output voltage V out on divider resistance R1 during greater than the chip internal reference voltage, chip internal control signal will make switch element Q1 end; After switch element Q1 ends, make output capacitance Co be in discharge condition, be lower than the chip internal reference voltage, when the next rising edge of internal signal arrives up to the branch pressure voltage of output voltage V out on divider resistance R1, output capacitance Co charging is given in switch element Q1 conducting once more again.
Though preferred embodiment of the present invention is disclosed with the purpose as illustration, it will be appreciated by those skilled in the art that various modifications, interpolation and replacement are possible, as long as it does not break away from the spirit and scope of the present invention that describe in detail in the claims.
Claims (4)
1. switching mode lowering and stabilizing blood pressure device circuit, comprise voltage input end, voltage output end, chip and peripheral circuit element, described chip comprises switch element, the output control switch element by or the trigger of the control signal of conducting, comparator, reference voltage source, the reference voltage of reference voltage source is input to the anode of comparator, the signal output part of comparator and the output of oscillator are connected to the input of trigger, it is characterized in that: also comprise current-limiting resistance Rsc in the described chip, divider resistance R1, divider resistance R2 and oscillator charge and discharge capacitance CT.
2. switching mode lowering and stabilizing blood pressure device circuit according to claim 1, it is characterized in that: the branch pressure voltage on the described divider resistance R1 feeds back to the negative terminal of comparator.
3. switching mode lowering and stabilizing blood pressure device circuit according to claim 1 is characterized in that: be connected with an AND circuit between the signal output part of described comparator and the input of trigger, another input of AND circuit links to each other with the output of oscillator.
4. switching mode lowering and stabilizing blood pressure device circuit according to claim 1, it is characterized in that: described peripheral circuit element comprises the voltage stabilizing didoe of the protection pressurizer that is connected voltage output end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010528578 CN101976945A (en) | 2010-11-02 | 2010-11-02 | Switch type buck regulator circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010528578 CN101976945A (en) | 2010-11-02 | 2010-11-02 | Switch type buck regulator circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101976945A true CN101976945A (en) | 2011-02-16 |
Family
ID=43576801
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010528578 Pending CN101976945A (en) | 2010-11-02 | 2010-11-02 | Switch type buck regulator circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101976945A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103812339A (en) * | 2012-11-09 | 2014-05-21 | 比亚迪股份有限公司 | Step-down circuit and step-down assembly having the same |
| CN105406714A (en) * | 2015-12-23 | 2016-03-16 | 重庆中科芯亿达电子有限公司 | DC-DC converter integrated circuit and application circuit thereof |
| CN105449994A (en) * | 2014-09-10 | 2016-03-30 | 立锜科技股份有限公司 | Control circuit of power converter |
| CN105703712A (en) * | 2015-12-31 | 2016-06-22 | 峰岹科技（深圳）有限公司 | High-precision RC oscillator |
| CN107834852A (en) * | 2017-11-28 | 2018-03-23 | 浙江水利水电学院 | A kind of reduction voltage circuit |
| CN107919791A (en) * | 2017-12-19 | 2018-04-17 | 郑州云海信息技术有限公司 | A kind of Voltage Feedback system and method for integrated circuit module |
| WO2025039110A1 (en) * | 2023-08-18 | 2025-02-27 | 台达电子工业股份有限公司 | Switch trigger capable of suppressing surge current |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1643764A (en) * | 2002-03-14 | 2005-07-20 | 泰科电子有限公司 | Three-Terminal, Low-Voltage PWM Controller IC |
| CN2896782Y (en) * | 2006-04-25 | 2007-05-02 | 健生工厂股份有限公司 | light emitting device |
| CN101087105A (en) * | 2006-06-09 | 2007-12-12 | 富士通株式会社 | DC-DC converter and control for DC-DC converter |
| CN101136589A (en) * | 2006-08-31 | 2008-03-05 | 夏普株式会社 | Semiconductor device, step-down chopper regulator, and electronic equipment |
| CN201063541Y (en) * | 2007-07-30 | 2008-05-21 | 重庆鹏阳电子科技有限公司 | High-frequency highly effective boosting DC/DC converter |
| CN101364770A (en) * | 2008-10-08 | 2009-02-11 | 复旦大学 | A Monolithically Integrated High Frequency Step-Down DC-DC Converter |
| CN101471603A (en) * | 2007-12-27 | 2009-07-01 | 英业达股份有限公司 | DC-DC buck converter and ripple improvement circuit |
-
2010
- 2010-11-02 CN CN 201010528578 patent/CN101976945A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1643764A (en) * | 2002-03-14 | 2005-07-20 | 泰科电子有限公司 | Three-Terminal, Low-Voltage PWM Controller IC |
| CN2896782Y (en) * | 2006-04-25 | 2007-05-02 | 健生工厂股份有限公司 | light emitting device |
| CN101087105A (en) * | 2006-06-09 | 2007-12-12 | 富士通株式会社 | DC-DC converter and control for DC-DC converter |
| CN101136589A (en) * | 2006-08-31 | 2008-03-05 | 夏普株式会社 | Semiconductor device, step-down chopper regulator, and electronic equipment |
| CN201063541Y (en) * | 2007-07-30 | 2008-05-21 | 重庆鹏阳电子科技有限公司 | High-frequency highly effective boosting DC/DC converter |
| CN101471603A (en) * | 2007-12-27 | 2009-07-01 | 英业达股份有限公司 | DC-DC buck converter and ripple improvement circuit |
| CN101364770A (en) * | 2008-10-08 | 2009-02-11 | 复旦大学 | A Monolithically Integrated High Frequency Step-Down DC-DC Converter |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103812339A (en) * | 2012-11-09 | 2014-05-21 | 比亚迪股份有限公司 | Step-down circuit and step-down assembly having the same |
| CN103812339B (en) * | 2012-11-09 | 2017-05-03 | 比亚迪股份有限公司 | Step-down circuit and step-down assembly having the same |
| CN105449994A (en) * | 2014-09-10 | 2016-03-30 | 立锜科技股份有限公司 | Control circuit of power converter |
| CN105449994B (en) * | 2014-09-10 | 2017-09-29 | 立锜科技股份有限公司 | The control circuit of the power converter |
| CN105406714A (en) * | 2015-12-23 | 2016-03-16 | 重庆中科芯亿达电子有限公司 | DC-DC converter integrated circuit and application circuit thereof |
| CN105406714B (en) * | 2015-12-23 | 2018-05-29 | 重庆中科芯亿达电子有限公司 | A kind of DC-DC converter integrated circuit and its application circuit |
| CN105703712A (en) * | 2015-12-31 | 2016-06-22 | 峰岹科技（深圳）有限公司 | High-precision RC oscillator |
| CN105703712B (en) * | 2015-12-31 | 2019-04-09 | 峰岹科技（深圳）有限公司 | High-precision RC oscillator |
| CN107834852A (en) * | 2017-11-28 | 2018-03-23 | 浙江水利水电学院 | A kind of reduction voltage circuit |
| CN107919791A (en) * | 2017-12-19 | 2018-04-17 | 郑州云海信息技术有限公司 | A kind of Voltage Feedback system and method for integrated circuit module |
| WO2025039110A1 (en) * | 2023-08-18 | 2025-02-27 | 台达电子工业股份有限公司 | Switch trigger capable of suppressing surge current |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10727747B2 (en) | Hybrid buck-boost converter | |
| CN101976945A (en) | Switch type buck regulator circuit | |
| CN101247053B (en) | Buck-boost conversion circuit and device for battery access, DC backup power supply device | |
| CN102025272B (en) | Discharging circuit | |
| CN103326458B (en) | A kind of external power source and battery powered power supply switch circuit | |
| CN102882369B (en) | Novel charge pump circuit in chip for motor drivers | |
| EP3399634A1 (en) | Isolated bidirectional dc-dc converter | |
| CN108336810B (en) | A control circuit compatible with battery and external power supply | |
| CN105281568A (en) | Voltage-reducing circuit | |
| CN207069897U (en) | Start-up circuit and inverse-excitation type switch power-supply | |
| EP3565101A1 (en) | Switching control method for isolated bidirectional dc-dc converter | |
| CN113067385B (en) | Battery cell charging and discharging device | |
| CN103532394A (en) | Continuously adjustable intelligent power module | |
| CN201789415U (en) | Power supply device for pulse-type load | |
| CN108879629A (en) | A kind of lithium battery charger output anti-surge circuit | |
| CN105449642B (en) | A kind of guard method of Boost circuit and circuit | |
| CN204030995U (en) | A kind of Switching Power Supply start-up circuit | |
| CN202142985U (en) | Voltage reducing and stabilizing circuit | |
| CN210839348U (en) | Non-isolated buck-boost converter | |
| CN209313501U (en) | A kind of double cell group parallel connection isolation circuit based on ideal diode | |
| CN102123553A (en) | COT mode LED lighting driving circuit | |
| CN204794694U (en) | Out put voltage control circuit and have power of this circuit | |
| CN211377868U (en) | Dormancy detection circuitry | |
| CN204168137U (en) | A kind of airborne power supply surge protection circuit of resistance to overvoltage/undervoltage | |
| CN205490464U (en) | Delay circuit of repid discharge |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 518057 SHENZHEN, GUANGDONG PROVINCE TO: 518049 SHENZHEN, GUANGDONG PROVINCE |
|
| TA01 | Transfer of patent application right |
Effective date of registration: 20120320 Address after: Futian District Meilin road Shenzhen City, Guangdong province 518049 No. 59 as the third floor of the north side of industrial building Applicant after: Shenzhen Fuman Electronic Co., Ltd. Address before: 518057 Guangdong city of Shenzhen province Nanshan District South Road four No. 31 EVOC technology building B5~B6 unit Applicant before: Nanshan Branch Company, Shenzhen Fuman Electronic Co., Ltd. |
|
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20110216 |