CN109617382B - Segmented power-taking circuit, driving method and circuit system - Google Patents
Segmented power-taking circuit, driving method and circuit system Download PDFInfo
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- CN109617382B CN109617382B CN201910082073.2A CN201910082073A CN109617382B CN 109617382 B CN109617382 B CN 109617382B CN 201910082073 A CN201910082073 A CN 201910082073A CN 109617382 B CN109617382 B CN 109617382B
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 157
- 239000003990 capacitor Substances 0.000 claims description 69
- 239000003381 stabilizer Substances 0.000 claims description 34
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000004146 energy storage Methods 0.000 claims description 4
- 238000000605 extraction Methods 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 238000003306 harvesting Methods 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000001131 transforming effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
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- Power Engineering (AREA)
- Direct Current Feeding And Distribution (AREA)
- Control Of Voltage And Current In General (AREA)
Abstract
The embodiment of the invention discloses a segmented power-taking circuit, a driving method and a circuit system, relates to the technical field of circuits, and aims to solve the problem that a micro control unit repeatedly starts reset and a product cannot take power. The segmented power taking circuit comprises: the device comprises a power supply unit, a voltage stabilizing compensation unit and a micro control unit; the positive electrode of the power supply unit is connected with the power input end of the micro control unit through the voltage stabilizing unit, and the grounding end of the micro control unit is grounded with the grounding end of the voltage stabilizing unit and is connected with the negative electrode of the power supply unit; the voltage stabilizing compensation unit is used for carrying out voltage compensation on the voltage stabilizing unit; the rated working voltage of the voltage stabilizing unit is higher than that of the micro control unit, and the difference value of the rated working voltage of the voltage stabilizing unit and the rated working voltage of the micro control unit is larger than or equal to the voltage output by the power supply unit when the micro control unit is started. The segmented power taking circuit, the driving method and the circuit system provided by the embodiment of the invention are used for supplying power to products.
Description
Technical Field
The present application relates to the field of circuit technologies, and in particular, to a segmented circuit, a driving method, and a circuit system.
Background
The micro control unit (Microcontroller Unit; MCU), also called as single chip microcomputer or single chip microcomputer, is to properly reduce the frequency and specification of the CPU, integrate the peripheral interfaces such as memory, counter, etc., and even LCD (Liquid CRYSTAL DISPLAY) driving circuit on a single chip to form a chip-level computer for different application occasions to control different combinations. For example, the micro control unit may be applied to a mobile phone, a PC (Personal Computer ) periphery, a remote controller, or control of an automobile electronic, industrial stepping motor, a robot arm, or the like.
However, in the current micro-control unit circuit, when the input voltage is equal to the rated working voltage of the micro-control unit, the initialization current of the micro-control unit is very large, and the input voltage is pulled down, so that the micro-control unit is reset, the micro-control unit is restarted after being reset, and then is reset again, and the repeated starting and resetting can cause the result that the product cannot get electricity.
Disclosure of Invention
The invention aims to provide a segmented power-taking circuit, a driving method and a circuit system, which are used for solving the problem that a micro control unit repeatedly starts reset and a product cannot take electricity.
In order to achieve the above object, the embodiment of the present invention provides the following technical solutions:
In a first aspect, a segmented power taking circuit is provided, and the segmented power taking circuit comprises a power supply unit, a voltage stabilizing compensation unit and a micro control unit;
The positive electrode of the power supply unit is connected with the power input end of the micro control unit through the voltage stabilizing unit, and the grounding end of the micro control unit and the grounding end of the voltage stabilizing unit are grounded and connected with the negative electrode of the power supply unit;
the voltage stabilizing compensation unit is used for carrying out voltage compensation on the voltage stabilizing unit;
The rated working voltage of the voltage stabilizing unit is higher than the rated working voltage of the micro control unit, and the difference value between the rated working voltage of the voltage stabilizing unit and the rated working voltage of the micro control unit is greater than or equal to the voltage output by the power supply unit when the micro control unit is started.
In the segmented power-taking circuit provided by the embodiment of the invention, because the positive electrode of the power supply unit is connected with the power input end of the micro-control unit through the voltage stabilizing unit, and the rated working voltage of the voltage stabilizing unit is higher than the rated working voltage of the micro-control unit, when the output voltage of the power supply unit is lower than the rated working voltage of the voltage stabilizing unit, the voltage stabilizing unit cannot work, and at the moment, the power supply unit cannot output voltage to the micro-control unit through the voltage stabilizing unit; when the output voltage of the power supply unit is greater than or equal to the rated working voltage of the voltage stabilizing unit, the voltage stabilizing unit starts to work, and the voltage stabilizing unit stabilizes the voltage output by the power supply unit so that the voltage transmitted to the micro control unit is the rated working voltage of the micro control unit; when the voltage of the power supply input end of the micro control unit is the rated working voltage of the micro control unit, the micro control unit starts to start, the instantaneous current in the starting process of the micro control unit is large, so that the voltage output by the power supply unit is pulled down by the micro control unit, at the moment, the voltage stabilizing compensation unit compensates the voltage of the voltage stabilizing unit, the voltage stabilizing unit is prevented from stopping working due to the fact that the circuit voltage cannot reach the rated working voltage, the voltage stabilizing unit is further guaranteed to continuously transmit the voltage to the micro control unit, and the voltage output by the power supply unit is pulled down when the difference value of the rated working voltage of the voltage stabilizing unit is larger than or equal to the rated working voltage of the micro control unit, so that the voltage between the power supply unit and the voltage stabilizing unit is still higher than the rated working voltage of the micro control unit, at the moment, the voltage after the voltage stabilizing unit transmits the voltage stabilizing to the micro control unit is still the rated working voltage of the micro control unit, the micro control unit can be started once, and the problem that the micro control unit is repeatedly started to reset and cannot take electricity is avoided.
In a second aspect, there is provided a driving method of a segmented power taking circuit, the driving method comprising:
The voltage stabilizing unit obtains rated working voltage and outputs the rated working voltage of the micro control unit to the micro control unit;
the micro control unit starts to start after obtaining rated working voltage, current is increased when the micro control unit starts, and output voltage of the power supply unit is pulled down;
After the output voltage of the power supply unit is pulled down, the voltage stabilizing compensation unit starts discharging to perform voltage compensation on the voltage stabilizing unit so as to maintain the voltage stabilizing unit to output the rated working voltage of the micro control unit to the micro control unit;
The rated working voltage of the voltage stabilizing unit is higher than the rated working voltage of the micro control unit, and the difference value between the rated working voltage of the voltage stabilizing unit and the rated working voltage of the micro control unit is greater than or equal to the output voltage of the power supply unit when the micro control unit is started.
Compared with the prior art, the driving method of the segmented power taking circuit provided by the embodiment of the invention has the same beneficial effects as the segmented power taking circuit provided by the technical scheme, and is not repeated herein.
In a third aspect, a circuit system is provided, the circuit system comprising at least one segmented power extraction circuit as described above.
Compared with the prior art, the beneficial effects of the circuit system provided by the embodiment of the invention are the same as those of the segmented power-taking circuit provided by the technical scheme, and the details are not repeated here.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and without limitation to the invention. In the drawings:
FIG. 1 is a block diagram of a segmented power-up circuit provided in an embodiment of the present invention;
Fig. 2 is a schematic structural diagram of a segmented circuit according to an embodiment of the present invention;
Fig. 3 is a flowchart of a driving method of a segmented power supply circuit according to an embodiment of the present invention.
Reference numerals:
1-a voltage stabilizing unit; 2-a voltage stabilizing compensation unit;
u1-voltage stabilizer; u2-micro control unit;
U3-voltage stabilizing control chip; an anode of the L0-power supply unit;
A negative electrode of the L1-power supply unit; d1-a diode;
R1-resistance; e1-a first electrolytic capacitor;
e2-a second electrolytic capacitor; e3-a third electrolytic capacitor;
C1-a first filter capacitor; and C2-a second filter capacitor.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1 and fig. 2, a segmented power supply circuit provided in an embodiment of the present invention includes: the device comprises a power supply unit, a voltage stabilizing unit 1, a voltage stabilizing compensation unit 2 and a micro control unit U2; the positive electrode L0 of the power supply unit is connected with the power input end of the micro control unit U2 through the voltage stabilizing unit 1, and the grounding end of the micro control unit U2 is connected with the grounding end of the voltage stabilizing unit 1 and the negative electrode L1 of the power supply unit; the voltage stabilizing compensation unit 2 is used for carrying out voltage compensation on the voltage stabilizing unit 1; the rated operating voltage of the voltage stabilizing unit 1 is higher than the rated operating voltage of the micro control unit U2, and the difference value of the rated operating voltage of the voltage stabilizing unit 1 higher than the rated operating voltage of the micro control unit U2 is larger than or equal to the voltage output by the power supply unit when the micro control unit U2 is started. The power supply unit may be a common disposable battery or a disposable battery pack, a storage battery or a storage battery pack, or may be low-voltage direct current obtained by transforming alternating current, so long as the direct current can supply power to the segmented power supply circuit in the embodiment of the present invention.
The segmented power supply means that the circuit is supplied with power in a time period, and the power is supplied to the rear end after the front end voltage is stabilized. In this embodiment, the voltage of the voltage stabilizing unit 1 is the front end voltage, the micro control unit U2 is the rear end, and after the voltage of the voltage stabilizing unit 1 is stabilized, power is supplied to the micro control unit U2.
In the segmented power taking circuit provided by the embodiment of the invention, because the positive electrode L0 of the power supply unit is connected with the power input end of the micro control unit U2 through the voltage stabilizing unit 1, and the rated working voltage of the voltage stabilizing unit 1 is higher than the rated working voltage of the micro control unit U2, when the output voltage of the power supply unit is lower than the rated working voltage of the voltage stabilizing unit 1, the voltage stabilizing unit 1 cannot work, and at the moment, the power supply unit cannot output voltage to the micro control unit U2 through the voltage stabilizing unit 1; when the output voltage of the power supply unit is greater than or equal to the rated working voltage of the voltage stabilizing unit 1, the voltage stabilizing unit 1 starts to work, and the voltage stabilizing unit 1 stabilizes the voltage output by the power supply unit so that the voltage transmitted to the micro control unit U2 is the rated working voltage of the micro control unit U2; when the terminal voltage of the power supply input end of the micro control unit U2 is the rated operating voltage of the micro control unit U2, the micro control unit U2 starts to start, and the instantaneous current when the micro control unit U2 starts is large, so that the voltage output by the power supply unit is pulled down by the micro control unit U2, at the moment, the voltage stabilizing compensation unit 2 compensates the voltage of the voltage stabilizing unit 1, thereby preventing the voltage stabilizing unit 1 from stopping working due to the fact that the circuit voltage cannot reach the rated operating voltage, further ensuring that the voltage stabilizing unit 1 continuously transmits the voltage to the micro control unit U2, and avoiding the problem that the voltage stabilizing unit U2 repeatedly starts to reset products because the rated operating voltage of the voltage stabilizing unit 1 is higher than the rated operating voltage of the micro control unit U2 by more than or equal to the voltage output by the micro control unit U2 when the difference value of the rated operating voltage of the voltage stabilizing unit 1 is higher than the rated operating voltage of the micro control unit U2, and therefore the voltage of the power supply unit is still higher than the rated operating voltage of the micro control unit U2.
Specifically, as shown in fig. 2, the voltage stabilizing unit 1 includes a voltage stabilizer U1 and a voltage stabilizing control chip U3; the voltage stabilizer U1 is provided with a switch for controlling the voltage stabilizer U1 to carry out voltage transmission, and the switch is connected with a signal output end of the voltage stabilizing control chip U3; the positive electrode L0 of the power supply unit is connected with the power input end of the voltage stabilizer U1 and the power input end of the voltage stabilizing control chip U3; the power output end of the voltage stabilizer U1 is connected with the power input end of the micro control unit U2; the grounding end of the micro control unit U2, the grounding end of the voltage stabilizer U1 and the grounding end of the voltage stabilizing control chip U3 are grounded and connected with the negative electrode L1 of the power supply unit; the rated working voltage of the voltage stabilizing control chip U3 is higher than the rated working voltage of the micro control unit U2, and the difference value of the rated working voltage of the voltage stabilizing control chip U3 higher than the rated working voltage of the micro control unit U2 is larger than or equal to the voltage output by the power supply unit when the micro control unit U2 is started.
When the output voltage of the power supply unit is lower than the rated working voltage of the voltage-stabilizing control chip U3, the voltage-stabilizing control chip U3 cannot work, namely, the signal output end of the voltage-stabilizing control chip U3 cannot output signals to the switch on the voltage stabilizer U1, at the moment, the voltage stabilizer U1 is closed, and the power supply unit cannot output voltage to the micro-control unit U2 through the voltage stabilizer U1.
When the output voltage of the power supply unit is greater than or equal to the rated working voltage of the voltage stabilizing control chip U3, the voltage stabilizing control chip U3 starts to work, the signal output end of the voltage stabilizing control chip U3 outputs a signal to the switch of the voltage stabilizer U1, at the moment, the voltage stabilizer U1 is opened to stabilize the voltage output by the power supply unit, so that the voltage transmitted to the micro control unit U2 is the rated working voltage of the micro control unit U2.
The voltage stabilizing control chip U3 is an S-80913CLMC chip or an S-80913CLNB chip. The voltage stabilizer U1 is one of an S-1212D33-E8T1U low-dropout linear voltage stabilizer, an S-1212D33-E6T1U low-dropout linear voltage stabilizer or an S-1212D33-M5T1U low-dropout linear voltage stabilizer.
Optionally, the voltage range of the voltage of the power supply unit is 1.5V-2V when the micro control unit U2 is started, that is, when the micro control unit U2 is started, if the voltage after voltage stabilization transmitted by the voltage stabilizer U1 to the micro control unit U2 is still the rated operating voltage of the micro control unit U2, the voltage after the power supply unit is pulled down should be greater than or equal to the rated operating voltage of the micro control unit U2 at this time, that is, the difference between the rated operating voltage of the voltage stabilizing control chip U3 and the rated operating voltage of the micro control unit U2 is greater than or equal to 2V.
It can be understood that the signal Output end of the voltage stabilizing control chip U3 is generally a common I/O (Input/Output) interface, that is, when the voltage stabilizing control chip U3 works, the signal Output end outputs a high level to the switch, and the voltage stabilizer U1 is turned on; when the voltage stabilizing control chip U3 does not work, the signal output end outputs low level to the switch, and the voltage stabilizer U1 is closed; the high level is a high voltage opposite to the low level, the high level may be 3.5V to 5V, the low level may be 0V to 0.25V, and the low level may be regarded as no input voltage.
In fig. 2, as an implementation example, if the output mode of the signal output end of the voltage stabilizing control chip U3 is NMOS (N-Metal Oxide Semiconductor, N-type metal-oxide-semiconductor) open circuit output, the signal output by the signal output end is not at a high level but at an open circuit state when the signal output end normally outputs, which makes the signal output end of the voltage stabilizing control chip U3 unable to output a stable signal, and the output signal is easily disturbed; to solve this problem, the voltage stabilizing unit 1 further includes a pull-up resistor R1, one end of the pull-up resistor R1 is connected to the power input end of the voltage stabilizing control chip U3, and the other end is connected to the signal output end of the voltage stabilizing control chip U3. Because the signal output end of the voltage stabilizing control chip U3 is connected with the pull-up resistor R1, the pull-up resistor R1 can pull up an output signal to a stable high level, and the signal is prevented from being interfered in the transmission process.
Specifically, as shown in fig. 2, the voltage stabilizing compensation unit 2 includes a diode D1 and a first electrolytic capacitor E1; the positive electrode of the diode D1 is connected with the power input end of the voltage stabilizer U1, the negative electrode of the diode D1 is connected with the positive electrode of the first electrolytic capacitor E1 and the power input end of the voltage stabilizing control chip U3, and the negative electrode of the first electrolytic capacitor E1 is connected with the grounding end of the voltage stabilizing control chip U3. Since the positive electrode of the first electrolytic capacitor E1 is connected to the power input end of the voltage stabilizer U1 through the diode D1 (i.e., connected to the positive electrode L0 of the power supply unit), the power supply unit can charge the first electrolytic capacitor E1 through the diode D1, and when the voltage output by the power supply unit reaches the rated operating voltage of the voltage stabilizing control chip U3, the voltage stabilizing control chip U3 starts to operate, and at this time, the voltage of the first electrolytic capacitor E1 is also the rated operating voltage of the voltage stabilizing control chip U3; when the micro control unit U2 is started and the output voltage of the power supply unit is pulled down, the first electrolytic capacitor E1 starts to discharge, and due to the unidirectional conduction characteristic of the diode D1, the first electrolytic capacitor only performs voltage compensation on the voltage stabilizing control chip U3, so that the voltage of the voltage stabilizing control chip U3 can still reach the rated working voltage, and the voltage stabilizing control chip U3 can work continuously to keep the voltage stabilizer U1 to perform voltage transmission on the micro control unit U2.
Further, as shown in fig. 2, the segmented power taking circuit further includes an energy storage element for storing energy. The energy storage element comprises a second electrolytic capacitor E2 and a third electrolytic capacitor E3; the anode of the second electrolytic capacitor E2 is connected with the anode L0 of the power supply unit, and the cathode of the second electrolytic capacitor E2 is connected with the cathode L1 of the power supply unit; the anode of the third electrolytic unit is connected with the power input end of the micro control unit U2, and the cathode of the third electrolytic capacitor E3 is connected with the grounding end of the micro control unit U2.
Since the positive electrode of the second electrolytic capacitor E2 is connected with the positive electrode L0 of the power supply unit, the negative electrode of the second electrolytic capacitor E2 is connected with the negative electrode L1 of the power supply unit, so that the power supply unit can charge the second electrolytic capacitor E2, and the voltage of the second electrolytic capacitor E2 is equal to the output voltage of the power supply unit; and the positive electrode of the third electrolytic capacitor E3 is connected to the power input terminal of the micro control unit U2, and the negative electrode of the third electrolytic capacitor E3 is connected to the ground terminal of the micro control unit U2, so that the voltage transmitted by the voltage regulator U1 can charge the third electrolytic capacitor E3 when the voltage regulator U1 is turned on. When the micro control unit U2 starts to start, the voltage of the circuit is pulled down, the second electrolytic capacitor E2 and the third electrolytic capacitor E3 start to discharge, the second electrolytic capacitor E2 discharges to compensate the voltage of the whole circuit, and the third electrolytic capacitor E3 discharges to compensate the voltage of the micro control unit U2; the second electrolytic capacitor E2 and the third electrolytic capacitor E3 compensate the voltage of the circuit, so that the output voltage of the micro control unit U2 is reduced, and the voltage transmitted by the voltage stabilizing unit 1 to the micro control unit U2 is still the rated working voltage of the micro control unit U2, so that the micro control unit U2 is started conveniently.
When the voltage provided by the power supply unit is low-voltage direct current obtained by transforming alternating current, alternating current components may be mixed in the transformed direct current, and in order to avoid the influence of the alternating current components in the current on the micro control unit U2, as shown in fig. 2, the segmented power taking circuit further comprises a filtering element for filtering. The filter element comprises a first filter capacitor C1 and a second filter capacitor C2; one pole of the first filter capacitor C1 is connected with the positive pole L0 of the power supply unit, and the other pole of the first filter capacitor C1 is connected with the negative pole L1 of the power supply unit; one pole of the second filter capacitor C2 is connected with the power input end of the micro control unit U2, and the other pole of the second filter capacitor C2 is connected with the grounding end of the micro control unit U2. Since one pole of the first filter capacitor C1 is connected with the positive pole L0 of the power supply unit, the other pole of the first filter capacitor C1 is connected with the negative pole L1 of the power supply unit, so that the first filter capacitor C1 can filter alternating current components in the current provided by the power supply unit; and because one pole of the second filter capacitor C2 is connected to the power input end of the micro control unit U2, the other pole of the second filter capacitor C2 is connected to the ground end of the micro control unit U2, so that the second filter capacitor C2 can filter the ac component in the current provided by the voltage regulator U1.
As a specific implementation manner, the rated operating voltage of the voltage stabilizing control chip U3 is 7V, the rated operating voltage of the micro control unit U2 is 5V, the output voltage of the power supply unit is pulled down by 2V when the micro control unit U2 is started, as shown in fig. 2, when the power supply unit outputs 6V voltage, the voltage stabilizing control chip U3 does not work, the signal output end of the voltage stabilizing control chip U3 does not transmit a signal to the switch of the voltage stabilizer U1, the voltage stabilizer U1 is not conducted, and at this time, the power supply unit only charges the first electrolytic capacitor E1 and the second electrolytic capacitor E2, and the voltages at two ends of the first electrolytic capacitor E1 and the second electrolytic capacitor E2 are 6V.
When the output voltage of the power supply unit is 7V, the voltages at the two ends of the first electrolytic capacitor E1 and the second electrolytic capacitor E2 are 7V, the voltage stabilizing control chip U3 starts to work, the signal output end of the voltage stabilizing control chip U3 transmits signals to the switch of the voltage stabilizer U1, the voltage stabilizer U1 starts to be conducted, the voltage stabilizer U1 stabilizes the 7V voltage output by the power supply unit to 5V, the 5V voltage is transmitted to the micro control unit U2, and meanwhile the third electrolytic capacitor E3 starts to be charged; when the micro control unit U2 starts to start, the micro control unit U2 can pull down the voltage output by the power supply unit by 2V due to the large instantaneous current in the starting process of the micro control unit U2, namely the voltage at the input end of the voltage stabilizing control chip U3 is 5V; at this time, due to the unidirectional conduction characteristic of the diode D1, the first electrolytic capacitor E1 only performs voltage compensation on the voltage stabilizing control chip U3, and the voltage of the voltage stabilizing control chip U3 is 7V as the voltage of the first electrolytic capacitor E1, so that the voltage stabilizing control chip U3 can continuously work; the second electrolytic capacitor E2 discharges to compensate the voltage of the whole circuit, the third electrolytic capacitor E3 discharges to compensate the voltage of the micro control unit U2, so that the output voltage of the micro control unit U2 is reduced by pulling down the power supply unit, namely the output voltage of the micro control unit U2 by pulling down the power supply unit may be 1.9V or 1.8V, therefore, the voltage between the power supply unit and the voltage stabilizing unit 1 is 5.1V or 5.2V and still higher than the rated working voltage of the micro control unit U2 by 5V, at the moment, the voltage stabilizing unit 1 still transmits 5V voltage to the micro control unit U2, thereby ensuring that the voltage at two ends of the micro control unit U2 is 5V continuously, enabling the micro control unit U2 to be started once, and avoiding the problems that the micro control unit U2 repeatedly starts to reset and the product cannot get electricity.
As shown in fig. 2 and 1, the present invention further provides a driving method of the above-mentioned segmented power-taking circuit according to the above embodiment, where the driving method includes:
Step S400: the voltage stabilizing unit 1 obtains the rated operating voltage and starts to work, and outputs the rated operating voltage of the micro control unit U2 to the micro control unit U2.
Step S500: the micro control unit U2 starts to start after obtaining rated working voltage, and the output voltage of the power supply unit is pulled down when the micro control unit U2 starts.
Step S600: after the output voltage of the power supply unit is pulled down, the voltage stabilizing compensation unit 2 starts discharging to perform voltage compensation on the voltage stabilizing unit 1 so as to maintain the voltage stabilizing unit 1 to output the rated working voltage of the micro control unit U2 to the micro control unit U2, wherein the rated working voltage of the voltage stabilizing unit 1 is higher than the rated working voltage of the micro control unit U2, and the difference value of the rated working voltage of the voltage stabilizing unit 1 higher than the rated working voltage of the micro control unit U2 is greater than or equal to the output voltage of the power supply unit pulled down when the micro control unit U2 starts.
Compared with the prior art, the driving method of the segmented power taking circuit provided by the embodiment of the invention has the same beneficial effects as the segmented power taking circuit provided by the embodiment, and is not repeated herein.
Specifically, as shown in fig. 2 and 3, before the voltage stabilizing unit 1 obtains the rated operating voltage and outputs the rated operating voltage of the micro control unit U2 to the micro control unit U2 through the circuit, the driving method of the segmented power taking circuit further includes:
step S100: the power supply unit transmits power to the voltage stabilizing unit 1 and the voltage stabilizing compensation unit 2.
Step S200: if the voltage output by the power supply unit does not reach the rated operating voltage of the voltage stabilizing unit 1, the voltage stabilizing unit 1 does not operate, and the power supply unit charges the voltage stabilizing compensation unit 2.
Step S300: if the voltage output by the power supply unit reaches the rated operating voltage of the voltage stabilizing unit 1, the voltage stabilizing unit 1 starts to operate, and the power supply unit charges the voltage stabilizing compensation unit 2.
As an implementation embodiment, the embodiment of the present invention further provides a circuit system, where the circuit system includes at least one segment extraction circuit described above; it should be noted that the circuit system is a circuit system of an electronic product, for example, the electronic product may be a mobile phone, a household intelligent appliance, etc.
Compared with the prior art, the circuit system provided by the embodiment of the invention has the same beneficial effects as the segmented power-taking circuit provided by the embodiment, and is not described in detail herein.
In the description of the above embodiments, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (12)
1. The sectional power taking circuit is characterized by comprising a power supply unit, a voltage stabilizing compensation unit and a micro control unit;
The positive electrode of the power supply unit is connected with the power input end of the micro control unit through the voltage stabilizing unit, and the grounding end of the micro control unit and the grounding end of the voltage stabilizing unit are grounded and connected with the negative electrode of the power supply unit;
the voltage stabilizing compensation unit is used for carrying out voltage compensation on the voltage stabilizing unit;
the rated working voltage of the voltage stabilizing unit is higher than the rated working voltage of the micro control unit, and the difference value between the rated working voltage of the voltage stabilizing unit and the rated working voltage of the micro control unit is greater than or equal to the voltage output by the power supply unit when the micro control unit is started;
the voltage stabilizing unit comprises a voltage stabilizer and a voltage stabilizing control chip;
the voltage stabilizer is provided with a switch for controlling the voltage stabilizer to carry out voltage transmission, and the switch is connected with a signal output end of the voltage stabilizing control chip;
The positive electrode of the power supply unit is connected with the power input end of the voltage stabilizer and the power input end of the voltage stabilizing control chip; the power output end of the voltage stabilizer is connected with the power input end of the micro control unit; the grounding end of the micro control unit, the grounding end of the voltage stabilizer and the grounding end of the voltage stabilizing control chip are grounded and connected with the negative electrode of the power supply unit;
The rated working voltage of the voltage stabilizing control chip is higher than the rated working voltage of the micro control unit, and the difference value between the rated working voltage of the voltage stabilizing control chip and the rated working voltage of the micro control unit is greater than or equal to the voltage output by the power supply unit when the micro control unit is started;
The voltage stabilizing compensation unit comprises a diode and a first electrolytic capacitor;
The anode of the diode is connected with the power input end of the voltage stabilizer, the cathode of the diode is respectively connected with the anode of the first electrolytic capacitor and the power input end of the voltage stabilizing control chip, and the cathode of the first electrolytic capacitor is connected with the grounding end of the voltage stabilizing control chip.
2. The segmented power supply circuit according to claim 1, wherein when the signal output end of the voltage stabilizing control chip has an output mode of NMOS open circuit output, the voltage stabilizing unit further comprises a pull-up resistor, one end of the pull-up resistor is connected with the power input end of the voltage stabilizing control chip, and the other end of the pull-up resistor is connected with the signal output end of the voltage stabilizing control chip.
3. The segmented power taking circuit according to claim 1, wherein the voltage output by the power supply unit is pulled down in the range of 1.5V-2V when the micro control unit is started.
4. A segmented power supply circuit according to any one of claims 2 to 3, wherein the voltage regulation control chip is an S-80913CLMC chip or an S-80913CLNB chip.
5. The segmented power supply circuit of any one of claims 2 to 3, wherein the voltage regulator is one of an S-1212D33-E8T1U low dropout linear voltage regulator, an S-1212D33-E6T1U low dropout linear voltage regulator, and an S-1212D33-M5T1U low dropout linear voltage regulator.
6. A segmented power harvesting circuit according to any one of claims 1-3, further comprising an energy storage element for storing energy.
7. The segmented power extraction circuit of claim 6, wherein the energy storage element comprises a second electrolytic capacitor and a third electrolytic capacitor;
The positive electrode of the second electrolytic capacitor is connected with the positive electrode of the power supply unit, and the negative electrode of the second electrolytic capacitor is connected with the negative electrode of the power supply unit;
The anode of the third electrolytic capacitor is connected with the power input end of the micro control unit, and the cathode of the third electrolytic capacitor is connected with the grounding end of the micro control unit.
8. A segmented power take-off circuit according to any one of claims 1 to 3, further comprising a filter element for filtering.
9. The segmented power take-off circuit of claim 8, wherein the filter element comprises a first filter capacitor and a second filter capacitor;
One pole of the first filter capacitor is connected with the positive pole of the power supply unit, and the other pole of the first filter capacitor is connected with the negative pole of the power supply unit;
one pole of the second filter capacitor is connected with the power input end of the micro control unit, and the other pole of the second filter capacitor is connected with the grounding end of the micro control unit.
10. A method of driving the segmented power supply circuit according to any one of claims 1 to 9, comprising:
The voltage stabilizing unit obtains rated working voltage and outputs the rated working voltage of the micro control unit to the micro control unit;
the micro control unit starts to start after obtaining rated working voltage, current is increased when the micro control unit starts, and output voltage of the power supply unit is pulled down;
After the output voltage of the power supply unit is pulled down, the voltage stabilizing compensation unit starts discharging to perform voltage compensation on the voltage stabilizing unit so as to maintain the voltage stabilizing unit to output the rated working voltage of the micro control unit to the micro control unit;
The rated working voltage of the voltage stabilizing unit is higher than the rated working voltage of the micro control unit, and the difference value between the rated working voltage of the voltage stabilizing unit and the rated working voltage of the micro control unit is greater than or equal to the output voltage of the power supply unit when the micro control unit is started.
11. The method according to claim 10, wherein before the voltage stabilizing unit obtains the rated operating voltage and outputs the rated operating voltage of the micro control unit to the micro control unit through the circuit, the method further comprises:
The power supply unit transmits power to the voltage stabilizing unit and the voltage stabilizing compensation unit;
If the voltage output by the power supply unit does not reach the rated working voltage of the voltage stabilizing unit, the voltage stabilizing unit does not output the rated working voltage of the micro control unit to the micro control unit, and the power supply unit charges the voltage stabilizing compensation unit;
And if the voltage output by the power supply unit reaches the rated working voltage of the voltage stabilizing unit, the voltage stabilizing unit outputs the rated working voltage of the micro control unit to the micro control unit, and meanwhile, the power supply unit charges the voltage stabilizing compensation unit.
12. Circuitry comprising at least one segmented power extraction circuit according to any one of claims 1 to 9.
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| CN201910082073.2A CN109617382B (en) | 2019-01-28 | 2019-01-28 | Segmented power-taking circuit, driving method and circuit system |
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| CN201910082073.2A CN109617382B (en) | 2019-01-28 | 2019-01-28 | Segmented power-taking circuit, driving method and circuit system |
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| CN109617382B true CN109617382B (en) | 2024-05-10 |
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| CN109617382A (en) | 2019-04-12 |
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