CN106300923A - It is applied to the low-voltage power circuit of MCU chip - Google Patents
It is applied to the low-voltage power circuit of MCU chip Download PDFInfo
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- CN106300923A CN106300923A CN201510313864.3A CN201510313864A CN106300923A CN 106300923 A CN106300923 A CN 106300923A CN 201510313864 A CN201510313864 A CN 201510313864A CN 106300923 A CN106300923 A CN 106300923A
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Abstract
The present invention discloses a kind of low-voltage power circuit being applied to MCU chip, including reference voltage generating circuit, feedback voltage generative circuit, comparator, agitator, PWM controller and voltage input/output circuitry, voltage input/output circuitry is connected with reference voltage generating circuit, reference voltage generating circuit and feedback voltage generative circuit are connected with comparator respectively, comparator is connected with PWM controller, PWM controller connects has agitator, PWM controller to be connected with voltage input/output circuitry.The reference voltage that reference voltage generating circuit in low-voltage power circuit generates is as the reference voltage of comparator, the signal that feedback voltage generative circuit generates is added in the input of comparator, comparator output controls PWM controller, output signal according to comparator controls the dutycycle of PWM controller, makes the output voltage stabilization of PWM controller in the range of setting value 3.3V.Voltage ripple of the present invention is low, conversion efficiency is high and load capacity strong, meets the applied voltage demand of MCU chip.
Description
Technical field
The invention belongs to electronics field, be more particularly to a kind of low-voltage power circuit being applied to MCU chip.
Background technology
The minimum work low pressure of existing MCU chip need to be more than 2V, need to design booster circuit for the application less than 2V and meet the needs of application.Due to booster circuit design complexity, peripheral circuit element is many, limits at the products application less to volume requirement, and cost of raw and processed materials is high, and processing charges is high.
Summary of the invention
In order to solve above-mentioned technical problem, the present invention provides the low-voltage power circuit being applied to MCU chip that a kind of output voltage ripple is low, conversion efficiency is high and load capacity is strong.
In order to reach above-mentioned technique effect, technical scheme is as follows:
It is applied to the low-voltage power circuit of MCU chip, including reference voltage generating circuit, feedback voltage generative circuit, comparator, agitator, PWM controller and voltage input/output circuitry, voltage input/output circuitry is connected with reference voltage generating circuit, reference voltage generating circuit and feedback voltage generative circuit are connected with comparator respectively, comparator is connected with PWM controller, PWM controller connects agitator, PWM controller is connected with voltage input/output circuitry, and voltage input/output circuitry is provided with voltage input end mouth and voltage output end mouth.
In some embodiments, voltage input end mouth is provided with inducer.
It has the beneficial effect that input voltage is powered to low-voltage power circuit through inducer, the reference voltage that reference voltage generating circuit in low-voltage power circuit generates is as the reference voltage of comparator, the signal that feedback voltage generative circuit generates is added in the input of comparator, comparator output controls PWM controller, PWM controller controls its dutycycle according to the output signal of comparator, makes the output voltage stabilization of PWM controller in the range of setting value 3.3V.Voltage ripple of the present invention is low, conversion efficiency is high and load capacity strong, meets the applied voltage demand of MCU chip.
Accompanying drawing explanation
The present invention is further illustrated below in conjunction with the accompanying drawings.
Fig. 1 is the schematic diagram of the low-voltage power circuit of the MCU chip of an embodiment of the present invention.
The title of corresponding component represented by numeral in figure:
1. reference voltage generating circuit, 2. feedback voltage generative circuit, 3. comparator, 4. agitator, 5. controller, 6. voltage input/output circuitry, 7. inducer.
Detailed description of the invention
As it is shown in figure 1, the present invention discloses a kind of low-voltage power circuit being applied to MCU chip, including reference voltage generating circuit 1, feedback voltage generative circuit 2, comparator 3, agitator 4, PWM controller 5 and voltage input/output circuitry 6.Reference voltage generating circuit 1 produces reference signal, and feedback voltage generative circuit 2 produces feedback signal.Comparator 3 is for detecting the phase contrast between reference signal and feedback signal, and the ripple voltage making power circuit export is low.Voltage input/output circuitry 6 is connected with reference voltage generating circuit 1, reference voltage generating circuit 1 and feedback voltage generative circuit 2 are connected with comparator 3 respectively, comparator 3 is connected with PWM controller 5, and PWM controller 5 connects has agitator 4, PWM controller 5 to be connected with voltage input/output circuitry 6.The operating frequency of PMW controller 5 is adjusted by agitator 4, and the operating frequency making PMW controller 5 is consistent with the frequency of agitator 4.By higher for the frequency configuration of agitator 4 so that the operating frequency of PMW controller 5 improves accordingly, so that power circuit obtains higher conversion frequency.Voltage input/output circuitry 6 is provided with voltage input end mouth and voltage output end mouth.Voltage input end mouth is provided with inducer 7, is powered low-voltage power circuit by inducer 7, has the effect of afterflow, it is ensured that continued power.In actual fabrication, by low-voltage power circuit of the present invention and the integrated low pressure applications chip of making of MCU chip, convenient use.
Input voltage is powered to low-voltage power circuit through inducer 7, the reference signal that reference voltage generating circuit 1 in low-voltage power circuit generates is as the reference signal of comparator 3, the signal that feedback voltage generative circuit 2 generates is added in the input of comparator 3, comparator 3 outputs signal to control PWM controller 5, PWM controller 5 controls its dutycycle according to the output signal of comparator 3, makes the output voltage stabilization of PWM controller 5 in the range of setting value 3.3V.Voltage ripple of the present invention is low, conversion efficiency is high and load capacity strong, meets the applied voltage demand of MCU chip.
The above-described preferred implementation being only the present invention and being applied to the low-voltage power circuit of MCU chip; for those of ordinary skill in the art; on the premise of not paying creative work, it is also possible to make some deformation and improvement, these broadly fall into protection scope of the present invention.
Claims (2)
1. it is applied to the low-voltage power circuit of MCU chip, it is characterised in that include that reference voltage is raw
Become circuit, feedback voltage generative circuit, comparator, agitator, PWM controller and voltage input/
Output circuit, described voltage input/output circuitry is connected with reference voltage generating circuit, described benchmark
Voltage generation circuit and feedback voltage generative circuit are connected with comparator respectively, described comparator and PWM
Controller connects, and described PWM controller connects agitator, and described PWM controller is defeated with voltage
Entering/output circuit connection, described voltage input/output circuitry is provided with voltage input end mouth and voltage
Output port.
The low-voltage power circuit being applied to MCU chip the most according to claim 1, its feature
Being, described voltage input end mouth is provided with inducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510313864.3A CN106300923A (en) | 2015-06-08 | 2015-06-08 | It is applied to the low-voltage power circuit of MCU chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510313864.3A CN106300923A (en) | 2015-06-08 | 2015-06-08 | It is applied to the low-voltage power circuit of MCU chip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106300923A true CN106300923A (en) | 2017-01-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510313864.3A Pending CN106300923A (en) | 2015-06-08 | 2015-06-08 | It is applied to the low-voltage power circuit of MCU chip |
Country Status (1)
| Country | Link |
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| CN (1) | CN106300923A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021212288A1 (en) * | 2020-04-20 | 2021-10-28 | 华为技术有限公司 | Voltage regulation circuit and method, operation system, and integrated module and circuit |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050116692A1 (en) * | 2003-12-02 | 2005-06-02 | Minoru Sugiyama | Method and apparatus for power supplying capable of effectively eliminating overshoot voltage |
| CN102684491A (en) * | 2011-05-10 | 2012-09-19 | 成都芯源系统有限公司 | Switching regulator and control circuit and control method thereof |
| CN102769378A (en) * | 2012-08-01 | 2012-11-07 | 成都芯源系统有限公司 | Constant-conduction-time-controlled switching power supply and control circuit and control method thereof |
| CN103532347A (en) * | 2013-10-09 | 2014-01-22 | 无锡华润矽科微电子有限公司 | PWM (pulse width modulation)-type switching power circuit |
| CN204244075U (en) * | 2014-11-27 | 2015-04-01 | 浙江商业职业技术学院 | With the power conversion system of frequency compensation device |
| CN204721204U (en) * | 2015-06-08 | 2015-10-21 | 无锡晶哲科技有限公司 | Be applied to the low-voltage power circuit of MCU chip |
-
2015
- 2015-06-08 CN CN201510313864.3A patent/CN106300923A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050116692A1 (en) * | 2003-12-02 | 2005-06-02 | Minoru Sugiyama | Method and apparatus for power supplying capable of effectively eliminating overshoot voltage |
| CN102684491A (en) * | 2011-05-10 | 2012-09-19 | 成都芯源系统有限公司 | Switching regulator and control circuit and control method thereof |
| CN102769378A (en) * | 2012-08-01 | 2012-11-07 | 成都芯源系统有限公司 | Constant-conduction-time-controlled switching power supply and control circuit and control method thereof |
| CN103532347A (en) * | 2013-10-09 | 2014-01-22 | 无锡华润矽科微电子有限公司 | PWM (pulse width modulation)-type switching power circuit |
| CN204244075U (en) * | 2014-11-27 | 2015-04-01 | 浙江商业职业技术学院 | With the power conversion system of frequency compensation device |
| CN204721204U (en) * | 2015-06-08 | 2015-10-21 | 无锡晶哲科技有限公司 | Be applied to the low-voltage power circuit of MCU chip |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021212288A1 (en) * | 2020-04-20 | 2021-10-28 | 华为技术有限公司 | Voltage regulation circuit and method, operation system, and integrated module and circuit |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170104 |
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| WD01 | Invention patent application deemed withdrawn after publication |