CN112928911B - Output end self-locking circuit for energy collector power supply management circuit - Google Patents
Output end self-locking circuit for energy collector power supply management circuit Download PDFInfo
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- CN112928911B CN112928911B CN202110448598.0A CN202110448598A CN112928911B CN 112928911 B CN112928911 B CN 112928911B CN 202110448598 A CN202110448598 A CN 202110448598A CN 112928911 B CN112928911 B CN 112928911B
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- mos tube
- management circuit
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- resistor
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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
- H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/24—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to undervoltage or no-voltage
- H02H3/243—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to undervoltage or no-voltage for DC systems
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/001—Energy harvesting or scavenging
Abstract
The invention relates to an output end self-locking circuit for an energy collector power management circuit, which comprises three MOS tubes, a diode and three resistors, wherein a first resistor and a second resistor are connected in series and then connected between the output end of the power management circuit and the ground in parallel, the connecting points of the first resistor and the second resistor are connected with the anode of the diode, the cathode of the diode is connected with the grid electrode of the second MOS tube, the source electrode of the second MOS tube is grounded, the drain electrode of the second MOS tube is connected with the grid electrode of the first MOS tube, the drain electrode of the second MOS tube is also connected with the output end of the power management circuit through the third resistor, the source electrode of the first MOS tube is connected with the output end of the power management circuit, the drain electrode of the first MOS tube is connected with the grid electrode of the third MOS tube, the source electrode of the third MOS tube is connected with the grid electrode of the second MOS tube, the drain electrode of the third MOS tube is connected with the output end of the power management circuit, and the drain electrode of the first MOS tube is connected with a load; the invention has the advantages of reasonable design, good reliability, simple structure and low cost.
Description
The technical field is as follows:
the present invention relates to an output terminal processing circuit, and more particularly, to an output terminal self-locking circuit for an energy collector power management circuit.
(II) background art:
energy problems are closely related to human survival and development, and the requirements for energy in different application fields are different. With the development of energy collection technology, self-powered applications are possible in the low end of the power spectrum, and such ultra-low power applications include various wireless sensing systems, such as medical care, environmental monitoring, fault diagnosis, and the like. The energy collector continuously captures energy in the environment, such as light energy, vibration energy, wave energy and the like, and the energy has randomness, so that the electric energy output by the energy collector has the characteristics of discontinuity in time and low average output power, and therefore a power management circuit is needed to manage the electric energy output by the energy collector, and the energy captured by the energy collector can provide the energy required by the intermittent operation of the wireless sensing node.
The existing energy collector power management circuit mainly has two forms, one is to use discrete components, and the other is to use a power management chip and its peripheral circuit. When discrete components are adopted, the control of energy output needs to be realized by manual connection or disconnection; when the power management chip and the peripheral circuit thereof are adopted, the control of energy output can be realized by matching a PGOOD output pin of the power management chip with a switch circuit; because the energy collector is mostly used in an unmanned working scene, the power management circuit of the energy collector needs to realize automatic control, but in the initial stage of energy collection, the power supply of the power management chip is unstable, which easily causes the malfunction of the PGOOD output pin of the power management chip to switch on the load, so that the load cannot be started normally, thereby not only wasting the collected electric energy, but also easily causing the repeated power-on of the load, and causing the serious consequence of the logic operation error of the wireless sensing node.
(III) the invention content:
the technical problem to be solved by the invention is as follows: the output end self-locking circuit for the energy collector power supply management circuit is reasonable in design, good in reliability, simple in circuit structure and low in cost.
The technical scheme of the invention is as follows:
an output end self-locking circuit for an energy collector power supply management circuit comprises a first MOS tube, a second MOS tube, a third MOS tube, a diode, a first resistor, a second resistor and a third resistor, wherein the first resistor and the second resistor are connected in series and then connected between the output end of the energy collector power supply management circuit and the ground in parallel, a connecting point of the first resistor and the second resistor is connected with the anode of the diode, the cathode of the diode is connected with the grid electrode of the second MOS tube, the source electrode of the second MOS tube is grounded, the drain electrode of the second MOS tube is connected with the grid electrode of the first MOS tube, the drain electrode of the second MOS tube is further connected with the output end of the energy collector power supply management circuit through the third resistor, the source electrode of the first MOS tube is connected with the output end of the energy collector power supply management circuit, the drain electrode of the first MOS tube is connected with the grid electrode of the third MOS tube, and the source electrode of the third MOS tube is connected with the grid electrode of the second MOS tube, the drain electrode of the third MOS tube is connected with the output end of the energy collector power supply management circuit, and the drain electrode of the first MOS tube is connected with a load; the drain electrode of the first MOS tube is the output end of the output end self-locking circuit for the energy collector power supply management circuit; the first MOS tube is a P-channel MOS tube, and the second MOS tube and the third MOS tube are N-channel MOS tubes.
The output end self-locking circuit for the energy collector power supply management circuit also comprises a second capacitor, and the second capacitor is connected between the grid of the second MOS tube and the ground in parallel.
The output end self-locking circuit for the energy collector power supply management circuit further comprises a first capacitor and a third capacitor, the first capacitor is connected between the output end of the energy collector power supply management circuit and the ground in parallel, and the third capacitor is connected between the drain electrode of the first MOS tube and the ground in parallel.
The first MOS tube, the second MOS tube and the third MOS tube are enhancement type MOS tubes.
The output end self-locking circuit adopts a first resistor and a second resistor for voltage division, directly divides the output voltage of the energy collector power management circuit and then uses the divided output voltage as a switching signal of a second MOS tube, and utilizes the energy storage effect of a second capacitor to isolate the influence of noise in the circuit on the switching action of the MOS tube and control the on-off of the circuit through the MOS tube; when the voltage of the output end of the power management circuit of the energy collector reaches a set threshold value, the second MOS tube, the first MOS tube and the third MOS tube are switched on, the energy in the first capacitor is transferred into the third capacitor, the circuit is self-locked through the third MOS tube, power is supplied to a load, the load works, and the self-starting of the wireless sensing system in a cold starting stage is realized; if the voltage of the output end of the energy collector power management circuit is reduced to be lower than the conduction voltage of the second MOS tube, the second MOS tube is disconnected, the first MOS tube and the third MOS tube are also disconnected, and power is not supplied to the load.
The invention has the beneficial effects that:
the invention adopts a divider resistor to acquire the voltage of the output end of the power management circuit of the energy collector, and then skillfully utilizes three MOS tubes to realize the on-off of the circuit; when the voltage output by the power management circuit of the energy collector meets the load requirement, the three MOS tubes are all opened to realize the self-starting of the rear-end load circuit, and the self-locking of the circuit is realized through the third MOS tube to ensure that the load works normally; when the voltage output by the power management circuit of the energy collector is too low and does not meet the requirement of the load, the three MOS tubes are all disconnected, so that power is not supplied to the following load, and the load is prevented from being started and working normally; the invention has the advantages of reasonable design, good reliability, simple circuit structure and low cost.
(IV) description of the drawings:
fig. 1 is a schematic diagram of an output side latch circuit for an energy harvester power management circuit.
(V) specific embodiment:
referring to fig. 1, the output terminal self-locking circuit for the energy collector power supply management circuit includes a first MOS transistor Q1, a second MOS transistor Q2, a third MOS transistor Q3, a diode D1, a first resistor R1, a second resistor R2 and a third resistor R3, the first resistor R1 and the second resistor R2 are connected in series and then connected between the output terminal VCC1 of the energy collector power supply management circuit and the ground, a connection point of the first resistor R1 and the second resistor R2 is connected with an anode of the diode D1, a cathode of the diode D1 is connected with a gate of the second MOS transistor Q2, a source of the second MOS transistor Q2 is grounded, a drain of the second MOS transistor Q2 is connected with a gate of the first MOS transistor Q1, a drain of the second MOS transistor Q2 is further connected with the output terminal VCC1 of the energy collector power supply management circuit through the third resistor R3, and a source of the first MOS transistor Q6478 is connected with the output terminal Q3 of the first MOS transistor Q1 and a drain of the first MOS transistor Q3, the source electrode of the third MOS tube Q3 is connected with the grid electrode of the second MOS tube Q2, the drain electrode of the third MOS tube Q3 is connected with the output end VCC1 of the energy collector power supply management circuit, and the drain electrode of the first MOS tube Q1 is connected with a load; the drain electrode of the first MOS transistor Q1 is the output end VCC2 of the output end self-locking circuit for the energy collector power supply management circuit; the first MOS transistor Q1 is a P-channel MOS transistor, and the second MOS transistor Q2 and the third MOS transistor Q3 are N-channel MOS transistors.
The output end self-locking circuit for the energy collector power supply management circuit also comprises a second capacitor C2, and the second capacitor C2 is connected between the grid electrode of the second MOS tube Q2 and the ground in parallel.
The output end self-locking circuit for the energy collector power supply management circuit further comprises a first capacitor C1 and a third capacitor C3, wherein the first capacitor C1 is connected between the output end VCC1 of the energy collector power supply management circuit and the ground in parallel, and the third capacitor C3 is connected between the drain electrode of the first MOS transistor Q1 and the ground in parallel.
The first MOS tube Q1, the second MOS tube Q2 and the third MOS tube Q3 are enhancement type MOS tubes.
The output end self-locking circuit adopts a first resistor R1 and a second resistor R2 for voltage division, directly divides the output voltage of the energy collector power management circuit and then uses the divided output voltage as a switching signal of a second MOS tube Q2, and utilizes the energy storage effect of a second capacitor C2 to isolate the influence of noise in the circuit on the switching action of the MOS tube and control the on-off of the circuit through the MOS tube; when the voltage of the output end VCC1 of the energy collector power supply management circuit reaches a set threshold, the second MOS tube Q2, the first MOS tube Q1 and the third MOS tube Q3 are switched on, the energy in the first capacitor C1 is transferred to the third capacitor C3, the circuit is self-locked through the third MOS tube Q3, power is supplied to a load, the load works, and the self-starting of the wireless sensing system in a cold starting stage is realized; if the voltage of the output terminal VCC1 of the energy collector power management circuit drops to be lower than the on-state voltage of the second MOS transistor Q2, the second MOS transistor Q2 is turned off, and the first MOS transistor Q1 and the third MOS transistor Q3 are also turned off, so that no power is supplied to the load.
Claims (4)
1. The utility model provides an output self-locking circuit for energy collector power management circuit which characterized by: the energy collector comprises a first MOS tube, a second MOS tube, a third MOS tube, a diode, a first resistor, a second resistor and a third resistor, wherein the first resistor and the second resistor are connected in series and then connected between the output end of the energy collector power management circuit and the ground in parallel, the connecting point of the first resistor and the second resistor is connected with the anode of the diode, the cathode of the diode is connected with the grid of the second MOS tube, the source of the second MOS tube is grounded, the drain of the second MOS tube is connected with the grid of the first MOS tube, the drain of the second MOS tube is also connected with the output end of the energy collector power management circuit through the third resistor, the source of the first MOS tube is connected with the output end of the energy collector power management circuit, the drain of the first MOS tube is connected with the grid of the third MOS tube, the source of the third MOS tube is connected with the grid of the second MOS tube, and the drain of the third MOS tube is connected with the output end of the energy collector power management circuit, the drain electrode of the first MOS tube is connected with a load; the first MOS tube is a P-channel MOS tube, and the second MOS tube and the third MOS tube are N-channel MOS tubes.
2. The output side self-locking circuit for an energy harvester power management circuit as claimed in claim 1, wherein: the second capacitor is connected in parallel between the grid of the second MOS tube and the ground.
3. The output end self-locking circuit for the energy collector power supply management circuit as claimed in claim 2, wherein: the power collector further comprises a first capacitor and a third capacitor, wherein the first capacitor is connected in parallel between the output end of the energy collector power management circuit and the ground, and the third capacitor is connected in parallel between the drain electrode of the first MOS tube and the ground.
4. The output side self-locking circuit for an energy harvester power management circuit as claimed in claim 1, wherein: the first MOS tube, the second MOS tube and the third MOS tube are enhancement type MOS tubes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110448598.0A CN112928911B (en) | 2021-04-25 | 2021-04-25 | Output end self-locking circuit for energy collector power supply management circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110448598.0A CN112928911B (en) | 2021-04-25 | 2021-04-25 | Output end self-locking circuit for energy collector power supply management circuit |
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| CN112928911A CN112928911A (en) | 2021-06-08 |
| CN112928911B true CN112928911B (en) | 2022-07-05 |
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| CN202110448598.0A Active CN112928911B (en) | 2021-04-25 | 2021-04-25 | Output end self-locking circuit for energy collector power supply management circuit |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202309659U (en) * | 2011-11-17 | 2012-07-04 | 中兴通讯股份有限公司 | Power input load power-on slow starter |
| CN102834998A (en) * | 2010-01-28 | 2012-12-19 | 德克萨斯仪器股份有限公司 | Power management DC-DC converter and method for induction energy harvester |
| CN203617899U (en) * | 2013-12-16 | 2014-05-28 | 四川升华电源科技有限公司 | Improved soft start apparatus for rapid discharge and constant-current charge |
| CN206506281U (en) * | 2017-02-17 | 2017-09-19 | 深圳市拓普泰克电子有限公司 | Battery low-voltage protection circuit and electronic equipment |
| CN109245749A (en) * | 2018-12-05 | 2019-01-18 | 博为科技有限公司 | A kind of delay switch circuit of reactance voltage fluctuation |
| CN110474408A (en) * | 2019-08-29 | 2019-11-19 | 厦门理工学院 | A kind of power circuit |
| CN210578474U (en) * | 2019-05-08 | 2020-05-19 | 博为科技有限公司 | Anti-voltage-fluctuation delay switch circuit based on rising edge sampling |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102594111A (en) * | 2012-02-24 | 2012-07-18 | 中兴通讯股份有限公司 | Quick discharge circuit |
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2021
- 2021-04-25 CN CN202110448598.0A patent/CN112928911B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102834998A (en) * | 2010-01-28 | 2012-12-19 | 德克萨斯仪器股份有限公司 | Power management DC-DC converter and method for induction energy harvester |
| CN202309659U (en) * | 2011-11-17 | 2012-07-04 | 中兴通讯股份有限公司 | Power input load power-on slow starter |
| CN203617899U (en) * | 2013-12-16 | 2014-05-28 | 四川升华电源科技有限公司 | Improved soft start apparatus for rapid discharge and constant-current charge |
| CN206506281U (en) * | 2017-02-17 | 2017-09-19 | 深圳市拓普泰克电子有限公司 | Battery low-voltage protection circuit and electronic equipment |
| CN109245749A (en) * | 2018-12-05 | 2019-01-18 | 博为科技有限公司 | A kind of delay switch circuit of reactance voltage fluctuation |
| CN210578474U (en) * | 2019-05-08 | 2020-05-19 | 博为科技有限公司 | Anti-voltage-fluctuation delay switch circuit based on rising edge sampling |
| CN110474408A (en) * | 2019-08-29 | 2019-11-19 | 厦门理工学院 | A kind of power circuit |
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| CN112928911A (en) | 2021-06-08 |
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