CN211786825U - Battery output voltage stabilizing circuit, discharging equipment and discharging system - Google Patents
Battery output voltage stabilizing circuit, discharging equipment and discharging system Download PDFInfo
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- CN211786825U CN211786825U CN202020720056.5U CN202020720056U CN211786825U CN 211786825 U CN211786825 U CN 211786825U CN 202020720056 U CN202020720056 U CN 202020720056U CN 211786825 U CN211786825 U CN 211786825U
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Abstract
The utility model discloses a battery output voltage stabilizing circuit, discharge apparatus and discharge system, power voltage stabilizing circuit, first switch unit, the second switch unit, the third switch unit, the fourth switch unit, inductance circuit and first afterflow circuit, power voltage stabilizing circuit's first control signal output end is connected with the controlled end of first switch unit, power voltage stabilizing circuit's second control signal output end is connected with the controlled end of second switch unit, power voltage stabilizing circuit's third control signal output end is connected with the controlled end of third switch unit, power voltage stabilizing circuit's fourth control signal output end is connected with the controlled end of fourth switch unit, power voltage stabilizing circuit's power input end and fourth switch unit's input are connected with the output of battery respectively. The utility model discloses technical scheme makes battery output voltage stable.
Description
Technical Field
The utility model relates to a steady voltage technical field, in particular to battery output voltage stabilizing circuit, discharge apparatus and discharge system.
Background
At present, most of electronic products powered by batteries directly transmit electric energy to electronic equipment through the batteries, when the electronic equipment is just started, because the electric energy is fully charged, the output voltage of the electronic products may exceed the rated power output by the batteries, after the batteries are used for a period of time, the stored electric energy may be slowly reduced, the output voltage of the batteries may be gradually reduced, in addition, external environmental factors such as temperature and the like all affect the voltage of the batteries, so that the voltage of the batteries exceeds or is lower than the rated output power of the batteries, and the instability of the voltage of the batteries may affect the performance of the electronic equipment if the electronic equipment which requires stable power supply voltage is directly connected with the batteries for power supply.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a battery output voltage stabilizing circuit aims at solving the unstable problem of current battery output voltage.
In order to achieve the above object, the present invention provides a battery output voltage stabilizing circuit, which includes a power voltage stabilizing circuit, a first switch unit, a second switch unit, a third switch unit, a fourth switch unit, an inductive circuit and a first follow current circuit;
the power supply voltage stabilizing circuit is provided with a detection end, a first control signal output end, a second control signal output end, a third control signal output end, a fourth control signal output end, a first floating power supply end, a second floating power supply end and a power supply input end, a first control signal output end of the power voltage stabilizing circuit is connected with a controlled end of the first switch unit, a second control signal output end of the power voltage stabilizing circuit is connected with a controlled end of the second switch unit, a third control signal output end of the power voltage stabilizing circuit is connected with a controlled end of the third switching unit, a fourth control signal output end of the power voltage stabilizing circuit is connected with a controlled end of the fourth switch unit, the power supply input end of the power supply voltage stabilizing circuit, the detection end of the power supply voltage stabilizing circuit and the input end of the fourth switch unit are respectively connected with the output end of the battery; the first end of the first switch unit is connected with electric equipment, and the second end of the first switch unit, the first end of the second switch unit and the first floating power supply end of the power voltage stabilizing circuit are respectively connected with the first input and output end of the inductive circuit; a second end of the second switching unit and a first end of the third switching unit are respectively connected with a first end of the first freewheeling circuit; the second end of the third switch unit, the first end of the fourth switch unit and the second floating power supply end of the power supply voltage stabilizing circuit are respectively connected with the second input and output end of the inductive circuit; the second end of the fourth switch unit and the power input end of the power voltage stabilizing circuit are respectively connected with a battery;
the power supply voltage stabilizing circuit is used for detecting input voltage, and when the input voltage is lower than a first preset voltage value, the first switch unit, the second switch unit, the third switch unit and the fourth switch unit work in a boost mode to improve the voltage value of the input voltage;
the first switching unit, the second switching unit, the third switching unit and the fourth switching unit are further used for working in a voltage reduction mode when the input voltage is higher than a second preset voltage value so as to reduce the voltage value of the input voltage;
and the first switch unit, the second switch unit, the third switch unit and the fourth switch unit work in a boosting mode or a voltage reduction mode when the input voltage is between a first preset voltage value and a second preset voltage value, so as to stabilize the voltage value of the input voltage.
Optionally, the battery output voltage stabilizing circuit further comprises a unidirectional conduction circuit, the power supply voltage stabilizing circuit further comprises a unidirectional conduction control signal output end, the input end of the unidirectional conduction circuit is connected with the first end of the first switch unit, the output end of the unidirectional conduction circuit is connected with the electric equipment, and the controlled end of the unidirectional conduction circuit is connected with the unidirectional conduction control signal output end of the power supply voltage stabilizing circuit.
Optionally, the power voltage stabilizing circuit includes a first bootstrap circuit, a second bootstrap circuit, a filter circuit and a voltage stabilizing chip, the voltage stabilizing chip has a detection pin, a first control signal output pin, a second control signal output pin, a third control signal output pin, a fourth control signal output pin, a first switch pin, a second switch pin, a power pin, an external voltage input pin, an internal voltage stabilizing output pin, a power ground, a first boost floating pin and a second boost floating pin, the first control signal output pin of the voltage stabilizing chip is a first control signal output end of the power voltage stabilizing circuit, the second control signal output pin of the voltage stabilizing chip is a second control signal output end of the power voltage stabilizing circuit, the third control signal output pin of the voltage stabilizing chip is a third control signal output end of the power voltage stabilizing circuit, the detection pin of the voltage stabilizing chip is a detection end of the power voltage stabilizing circuit, a fourth control signal output pin of the voltage stabilizing chip is a fourth control signal output end of the power voltage stabilizing circuit, a power pin of the voltage stabilizing chip is connected with the first end of the filter circuit, an external voltage input pin of the voltage stabilizing chip is connected with the second end of the filter circuit, and an internal voltage stabilizing output pin of the voltage stabilizing chip is connected with the third end of the filter circuit; the power supply ground of the voltage stabilizing chip is suspended, a first boosting floating pin of the voltage stabilizing chip is connected with the input end of the first bootstrap circuit, a second boosting floating pin of the voltage stabilizing chip is connected with the input end of the second bootstrap circuit, a first switch pin of the voltage stabilizing chip and the output end of the first bootstrap circuit are respectively connected with the first end of the first switch unit, and a second switch pin of the voltage stabilizing chip and the output end of the second bootstrap circuit are respectively connected with the second end of the third switch unit; and the bootstrap end of the first bootstrap circuit is connected with the bootstrap end of the second bootstrap circuit.
Optionally, the inductive circuit includes a first inductor, a first end of the first inductor is a first input/output end of the inductive circuit, and a second end of the first inductor is a second input/output end of the inductive circuit.
Optionally, the first freewheel circuit comprises a first diode, an anode of the first diode being a first end of the first freewheel circuit, and a cathode 2 of the first diode being a second end of the first freewheel circuit.
Optionally, the first bootstrap circuit includes a second diode and a first capacitor, an anode of the second diode is a bootstrap terminal of the first bootstrap circuit, a cathode of the second diode is connected to the first terminal of the first capacitor, a connection node thereof is an input terminal of the first bootstrap circuit, and a second terminal of the first capacitor is an output terminal of the first bootstrap circuit.
Optionally, the filter circuit includes a second capacitor, a third capacitor, and a fourth capacitor, where a first end of the second capacitor is a first end of the filter circuit, a second end of the second capacitor, an external voltage input pin of the voltage regulator chip, and a first end of the third capacitor are respectively connected to a first end of the fourth capacitor, and a connection node of the second capacitor is a second end of the filter circuit; and the second end of the third capacitor is connected with the second end of the fourth capacitor, and the connection node of the third capacitor is the third end connection of the filter circuit.
Optionally, the model of the voltage stabilization chip is LTC 3780.
Optionally, the first switch unit, the second switch unit, the third switch unit and the fourth switch unit adopt N-type MOS transistors.
In order to achieve the above object, the present invention provides a discharging device, which includes a battery and a battery output voltage stabilizing circuit as described above.
In order to achieve the above object, the present invention provides a discharging system, which comprises a battery, a power consumption device and a battery output voltage stabilizing circuit as described above.
The utility model discloses technical scheme is through being provided with power voltage stabilizing circuit, first switch unit, second switch unit, third switch unit, fourth switch unit, inductance circuit and first afterflow circuit in battery output voltage stabilizing circuit's heating circuit. The power supply voltage stabilizing circuit detects input voltage, and when the input voltage is lower than a first preset voltage value, the first switch unit, the second switch unit, the third switch unit and the fourth switch unit work in a boost mode to improve the voltage value of the input voltage;
the first switching unit, the second switching unit, the third switching unit and the fourth switching unit are further used for working in a voltage reduction mode when the input voltage is higher than a second preset voltage value so as to reduce the voltage value of the input voltage;
and the first switch unit, the second switch unit, the third switch unit and the fourth switch unit work in a boosting mode or a voltage reduction mode when the input voltage is between a first preset voltage value and a second preset voltage value, so as to stabilize the voltage value of the input voltage. Through the scheme, under the condition that the input voltage of the battery output voltage stabilizing circuit is lower than or higher than the preset voltage value, the battery output voltage stabilizing circuit can output a stable voltage value, and when the circuit is applied to a battery output circuit, the output voltage of the battery can be stabilized, so that the application stability and the safety performance of the battery can be protected.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic circuit diagram of an embodiment of the battery output voltage stabilizing circuit of the present invention.
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, if appearing throughout the text, "and/or" is meant to include three juxtaposed aspects, taking "A and/or B" as an example, including either the A aspect, or the B aspect, or both A and B satisfied aspects. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The utility model provides a battery output voltage stabilizing circuit. The method is used for solving the problem of unstable output voltage of the existing battery.
In an embodiment of the present invention, as shown in fig. 1, the battery output voltage stabilizing circuit includes a power voltage stabilizing circuit 10, a first switch unit 20, a second switch unit 30, a third switch unit 40, a fourth switch unit 50, an inductance circuit 60 and a first freewheeling circuit 70. A power voltage stabilizing circuit 10 having a detection end, a first control signal output end, a second control signal output end, a third control signal output end, a fourth control signal output end, a first floating power supply end, a second floating power supply end and a power supply input end, wherein the first control signal output end of the power voltage stabilizing circuit 10 is connected with the controlled end of the first switch unit 20, the second control signal output end of the power voltage stabilizing circuit 10 is connected with the controlled end of the second switch unit 30, the third control signal output end of the power voltage stabilizing circuit 10 is connected with the controlled end of the third switch unit 40, the fourth control signal output end of the power voltage stabilizing circuit 10 is connected with the controlled end of the fourth switch unit 50, the power supply input end of the power voltage stabilizing circuit 10, the input end of the fourth switch unit 50 and the detection end of the power voltage stabilizing circuit 10 are respectively connected with the output end of the; a first end of the first switch unit 20 is connected with the electric equipment, and a second end of the first switch unit 20, a first end of the second switch unit 30 and a first floating power supply end of the power supply voltage stabilizing circuit 10 are respectively connected with a first input/output end of the inductance circuit 60; a second terminal of the second switching unit 30 and a first terminal of the third switching unit 40 are connected to a first terminal of the first freewheel circuit 70, respectively; the second terminal of the third switching unit 40, the first terminal of the fourth switching unit 50 and the second floating power supply terminal of the power supply voltage stabilizing circuit 10 are respectively connected to the second input and output terminals of the inductor circuit 60; the second terminal of the fourth switching unit 50 and the power input terminal of the power voltage stabilizing circuit 10 are respectively connected to the battery.
The power supply voltage stabilizing circuit 10 is used for detecting an input voltage, and in a first condition, when the input voltage is lower than a first preset voltage value, the first switching unit, the second switching unit, the third switching unit and the fourth switching unit work in a boosting mode to increase the voltage value of the input voltage;
the first switching unit, the second switching unit, the third switching unit and the fourth switching unit are further used for working in a voltage reduction mode when the input voltage is higher than a second preset voltage value so as to reduce the voltage value of the input voltage;
and the first switch unit, the second switch unit, the third switch unit and the fourth switch unit work in a boosting mode or a voltage reduction mode when the input voltage is between a first preset voltage value and a second preset voltage value, so as to stabilize the voltage value of the input voltage. Through the scheme, the battery output voltage stabilizing circuit can output a stable voltage value under the condition that the input voltage of the battery output voltage stabilizing circuit is lower than or higher than the preset voltage value, and when the circuit is applied to a battery output circuit, the output voltage of a battery can be stabilized.
Based on the above-described embodiment, the following method may be employed to control the turn-off of the first, second, third, and fourth switching units 20, 30, 40, and 50 to stabilize the output voltage.
In the first case, the input voltage is lower than the first preset voltage value, the boost mode is performed, the fourth switching unit 50 is normally closed to obtain a dc input path, the third switching unit 40 is normally open, and the first switching unit 20 and the second switching unit 30 are controlled to be alternately turned on and off, where the alternate turning on and off may be controlled by a digital signal with a preset frequency. When the second switch unit 30 is turned on and the first switch unit 20 is turned off, the power input terminal stores magnetic energy for the inductor circuit 60, and when the second switch unit 30 is turned off, the inductor circuit 60 discharges and is superimposed on the original direct current to discharge through the first switch unit 20 when the first switch unit 20 is turned on.
In the second case, the input voltage is higher than the second preset voltage value, the voltage reducing mode is operated, the first switching unit 20 is controlled to be normally closed to obtain a direct current input path, the second switching unit 30 is normally open, and the third switching unit 40 and the fourth switching unit 50 are alternately switched on and off, wherein the alternate switching on and off can be controlled by a digital signal with a preset frequency. At this time, the fourth switching unit 50 is turned on to supply power to the inductor circuit 60, and the third switching unit 40 is turned on to supply power to the inductor circuit 60.
In the third case, the input voltage is between the first preset voltage value and the second preset voltage value, and the first switching unit 20 and the fourth switching unit 50 are in the on state for most of each period. In order to accommodate only a small potential difference between the output and the output terminal of the battery, the charging and discharging of the inductor circuit 60 is controlled by the first switching unit 20 to the third switching unit 40, or the second switching unit 30 to the fourth switching unit 50, which are turned on between the first terminal of the first switching unit 20 and the ground, to stabilize the output voltage during a brief period of each cycle. By setting the resistance of the voltage setting resistor, the value of the output voltage of the first terminal of the first switching unit 20 can be preset, which is very convenient.
In an embodiment, the battery output voltage stabilizing circuit further includes a unidirectional conducting circuit, the power voltage stabilizing circuit 10 further includes a unidirectional conducting control signal output terminal, an input terminal of the unidirectional conducting circuit is connected to the first terminal of the first switch unit 20, an output terminal of the unidirectional conducting circuit is connected to the electrical equipment, and a controlled terminal of the unidirectional conducting circuit is connected to the unidirectional conducting control signal output terminal of the power voltage stabilizing circuit 10.
The unidirectional conduction circuit can play a role in protection, so that the current output by the battery output voltage stabilizing circuit cannot flow back to the battery output voltage stabilizing circuit.
Optionally, as shown in fig. 1, to simplify the circuit, the unidirectional conducting circuit includes a fourth diode D4.
In one embodiment, the power voltage regulator circuit 10 includes a first bootstrap circuit 101, a second bootstrap circuit 102, a filter circuit 103, and a voltage regulation chip U1, the voltage regulation chip U1 has a detection pin, a first control signal output pin TG1, a second control signal output pin BG1, a third control signal output pin BG2, a fourth control signal output pin TG2, a first switch pin SW1, a second switch pin SW2, a power pin VIN, an external voltage input pin EXTVcc, an internal voltage regulation output pin INTVcc, a power ground PGND, a first BOOST floating pin BOOST1, and a second BOOST floating pin BOOST2, the detection pin of the voltage regulation chip U1 is connected to the battery, the first control signal output pin TG1 of the voltage regulation chip U1 is a first control signal output terminal of the power voltage regulator circuit 10, the second control signal output pin BG1 of the voltage regulation chip U1 is a second control signal output terminal of the power voltage regulator circuit 10, the third control signal output pin BG2 of the voltage regulation chip U1 is a third control signal output terminal of the power voltage regulator circuit 3610, a fourth control signal output pin TG2 of the voltage stabilization chip U1 is a fourth control signal output end of the power voltage stabilization circuit 10, a power supply pin VIN of the voltage stabilization chip U1 is connected with a first end of the filter circuit 103, an external voltage input pin EXTVcc of the voltage stabilization chip U1 is connected with a second end of the filter circuit 103, and an internal voltage stabilization output pin INTVcc of the voltage stabilization chip U1 is connected with a third end of the filter circuit 103; the power ground PGND of the voltage regulation chip U1 is floating, the first BOOST floating pin BOOST1 of the voltage regulation chip U1 is connected to the input terminal of the first bootstrap circuit 101, the second BOOST floating pin BOOST2 of the voltage regulation chip U1 is connected to the input terminal of the second bootstrap circuit 102, the output terminals of the first switch pin SW1 and the first bootstrap circuit 101 of the voltage regulation chip U1 are respectively connected to the first terminal of the first switch unit 20, and the output terminals of the second switch pin SW2 and the second bootstrap circuit 102 of the voltage regulation chip U1 are respectively connected to the second terminal of the third switch unit 40; the bootstrap terminal of the first bootstrap circuit 101 is connected to the bootstrap terminal of the second bootstrap circuit 102.
The first bootstrap circuit 101 and the second bootstrap circuit 102 may perform certain function supplementation to stabilize the output voltage, the filter circuit 103 is configured to filter out noise, and the voltage stabilizing chip U1 may compare the input voltage input by the power pin VIN with a preset first preset voltage value and a preset second voltage value. In the first case, the input voltage is lower than the first preset voltage value, the boost mode is performed, the fourth switching unit 50 is normally closed to obtain a dc input path, the third switching unit 40 is normally open, and the first switching unit 20 and the second switching unit 30 are controlled to be alternately turned on and off, where the alternate turning on and off may be controlled by a digital signal with a preset frequency. When the second switch unit 30 is turned on and the first switch unit 20 is turned off, the power input terminal stores magnetic energy for the inductor circuit 60, and when the second switch unit 30 is turned off, the inductor circuit 60 discharges and is superimposed on the original direct current to discharge through the first switch unit 20 when the first switch unit 20 is turned on. In the second case, the input voltage is higher than the second preset voltage value, the voltage reducing mode is operated, the first switching unit 20 is controlled to be normally closed to obtain a direct current input path, the second switching unit 30 is normally open, and the third switching unit 40 and the fourth switching unit 50 are alternately switched on and off, wherein the alternate switching on and off can be controlled by a digital signal with a preset frequency. At this time, the fourth switching unit 50 is turned on to supply power to the inductor circuit 60, and the third switching unit 40 is turned on to supply power to the inductor circuit 60. In the third case, the input voltage is between the first preset voltage value and the second preset voltage value, and the first switching unit 20 and the fourth switching unit 50 are in the on state for most of each period. In order to accommodate only a small potential difference between the output and the output terminal of the battery, the charging and discharging of the inductor circuit 60 is controlled by the first switching unit 20 to the third switching unit 40, or the second switching unit 30 to the fourth switching unit 50, which are turned on between the first terminal of the first switching unit 20 and the ground, to stabilize the output voltage during a brief period of each cycle. By setting the resistance of the voltage setting resistor, the value of the output voltage of the first terminal of the first switching unit 20 can be preset, which is very convenient.
In one embodiment, the inductor circuit 60 includes a first inductor L1, a first terminal of the first inductor L1 is a first input/output terminal of the inductor circuit 60, and a second terminal of the first inductor L1 is a second input/output terminal of the inductor circuit 60.
The first inductor L1 is used to store and discharge electric energy.
In one embodiment, the first flywheel circuit 70 includes a first diode D1, the anode of the first diode D1 is the first terminal of the first flywheel circuit 70, and the cathode 2 of the first diode D1 is the second terminal of the first flywheel circuit 70.
When the first freewheeling circuit 70 is a diode, the current flowing in the path where the first diode D1 is located may be changed by controlling the on and off of the second switching unit 30 and the third switching unit 40, so as to turn on or off the diode, thereby implementing the first inductor L1 to store electric energy or release electric energy.
In an embodiment, the first bootstrap circuit 101 includes a second diode D3 and a first capacitor C1, an anode of the second diode D3 is a bootstrap terminal of the first bootstrap circuit 101, a cathode of the second diode D3 is connected to a first terminal of the first capacitor C1, a connection node thereof is an input terminal of the first bootstrap circuit 101, and a second terminal of the first capacitor C1 is an output terminal of the first bootstrap circuit 101.
The second diode D3 is a zener diode, and the size of the first capacitor C1 can be set as required.
In an embodiment, the second bootstrap circuit 102 includes a third diode D3 and a fifth capacitor C5, an anode of the third diode D3 is a bootstrap terminal of the second bootstrap circuit 102, a cathode of the third diode D3 is connected to a first terminal of the fifth capacitor C5, a connection node of the first diode D3 is an input terminal of the second bootstrap circuit 102, and a second terminal of the third capacitor is an output terminal of the second bootstrap circuit 102.
The third diode D3 is a zener diode, and the size of the fifth capacitor C5 can be set as required.
In an embodiment, the filter circuit 103 includes a second capacitor C2, a third capacitor C3, and a fourth capacitor C4, a first end of the second capacitor C2 is a first end of the filter circuit 103, a second end of the second capacitor C2, an external voltage input pin EXTVcc of the regulator chip U1, and a first end of the third capacitor C3 are respectively connected to a first end of the fourth capacitor C4, and a connection node thereof is a second end of the filter circuit 103; the second terminal of the third capacitor C3 is connected to the second terminal of the fourth capacitor C4, and the connection node is the third terminal of the filter circuit 103.
The third capacitor C3 and the fourth capacitor C4 are connected in parallel, so that a good filtering effect can be achieved.
In one embodiment, to achieve the voltage stabilizing function better, the voltage stabilizing chip U1 is of LTC3780 type.
In an embodiment, in order to simplify the control process, the first switching unit 20, the second switching unit 30, the third switching unit 40, and the fourth switching unit 50 employ N-type MOS transistors.
The principle of the present invention is explained below with reference to fig. 1:
when the detected input voltage (battery voltage) is higher than a second preset voltage value, and the second preset voltage value can be the voltage required by power supply at the moment, the voltage stabilizing chip U1 works in a Buck switch voltage reduction working mode (voltage reduction mode), at the moment, the voltage stabilizing chip U1 outputs a second control instruction, the first MOS transistor Q1 is normally closed to obtain a direct current output path, the second MOS transistor Q2 is normally open, the third MOS transistor Q3 and the fourth MOS transistor Q4 are alternately switched on and off, the switch of the fourth MOS transistor Q4 is opened to supply power to the first inductor L1, the third MOS transistor Q3 is used for enabling current to flow for the first inductor L1, and the voltage reduction type Buck switch voltage stabilization output effect is obtained.
When the detected input voltage (battery voltage) is lower than a first preset voltage value, which may be the input power voltage VIN of the power pin VIN of the regulator chip U1, the regulator chip U1 automatically switches to the Boost operating mode (Boost mode). At this time, the voltage stabilizing chip U1 makes the fourth MOS transistor Q4 normally closed to obtain a direct current input path, and the third MOS transistor Q3 is normally open, the input power supplies power to the first inductor L1 through the through fourth MOS transistor Q4, the first MOS transistor Q1 and the second MOS transistor Q2 are alternately turned on and off, when the second MOS transistor Q2 turns on the first MOS transistor Q1 and is turned off, the power supply VIN stores magnetic energy for the first inductor L1, and is turned off at the second MOS transistor Q2, and at the same time, when the first MOS transistor Q1 is turned on, the inductor discharges and is superimposed on the original direct current to discharge through the first MOS transistor Q1 to realize a Boost working mode.
When the detected input voltage is between the first preset voltage value and the second preset voltage value, that is, the input voltage is close to the output voltage VOUT, the regulator chip U1 operates in the step-up mode or the step-down mode, and the regulator chip U1 turns on the first MOS transistor Q1 and the fourth MOS transistor Q4 for most of each cycle. In order to adapt to only a small potential difference between the output and the input power voltage, the voltage stabilizing chip U1 controls the charging and discharging of the first inductor L1 within a short time of each cycle, and the first MOS transistor Q1 to the fourth MOS transistor Q4 are connected between the battery and the ground, or the second MOS transistor Q2 and the third MOS transistor Q3 are connected between the output terminal vout of the battery output voltage stabilizing circuit and the ground, so as to stabilize the output voltage. The value of the output voltage of the output end vout of the battery output voltage stabilizing circuit can be preset by setting the resistance value of the voltage setting resistor, so that the method is very convenient.
The design uses the circuit structure, so that the high-efficiency switching regulator can be formed, the output voltage is stabilized at the set voltage value under the condition that the voltage is less than, equal to or greater than the required power supply voltage, and the stability of the power supply voltage output to the electric equipment by the output end vout1 of the battery output voltage stabilizing circuit is ensured. Where output vout1 and output vout are actually two outputs connected by a wire.
In order to solve the above problem, the utility model discloses still provide a discharge apparatus, including the battery and as above battery output voltage stabilizing circuit.
It is worth noting that, because this application discharge apparatus has contained foretell battery output voltage stabilizing circuit, consequently, the utility model discloses a discharge apparatus contains all embodiments and beneficial effect of above-mentioned battery output voltage stabilizing circuit, no longer gives details here.
In order to solve the above problem, the utility model discloses still provide a discharge system, including battery, consumer and as above battery output voltage stabilizing circuit.
The third light emitting diode D3 may be a light emitting diode of each color.
It is worth noting that, because this application discharge system has contained foretell battery output voltage stabilizing circuit, consequently, the utility model discloses a discharge system contains all embodiments and beneficial effect of above-mentioned battery output voltage stabilizing circuit, no longer gives details here.
The above is only the optional embodiment of the present invention, and not therefore the scope of the present invention is limited, all the equivalent structure changes made by the contents of the specification and the drawings are utilized under the inventive concept of the present invention, or the application directly/indirectly in other related technical fields are included in the patent protection scope of the present invention.
Claims (10)
1. A battery output voltage stabilizing circuit is characterized by comprising a power supply voltage stabilizing circuit, a first switch unit, a second switch unit, a third switch unit, a fourth switch unit, an inductance circuit and a first follow current circuit;
the power supply voltage stabilizing circuit is provided with a detection end, a first control signal output end, a second control signal output end, a third control signal output end, a fourth control signal output end, a first floating power supply end, a second floating power supply end and a power supply input end, a first control signal output end of the power voltage stabilizing circuit is connected with a controlled end of the first switch unit, a second control signal output end of the power voltage stabilizing circuit is connected with a controlled end of the second switch unit, a third control signal output end of the power voltage stabilizing circuit is connected with a controlled end of the third switching unit, a fourth control signal output end of the power voltage stabilizing circuit is connected with a controlled end of the fourth switch unit, the power supply input end of the power supply voltage stabilizing circuit, the input end of the fourth switching unit and the detection end of the power supply voltage stabilizing circuit are respectively connected with the output end of the battery; the first end of the first switch unit is connected with electric equipment, and the second end of the first switch unit, the first end of the second switch unit and the first floating power supply end of the power voltage stabilizing circuit are respectively connected with the first input and output end of the inductive circuit; a second end of the second switching unit and a first end of the third switching unit are respectively connected with a first end of the first freewheeling circuit; the second end of the third switch unit, the first end of the fourth switch unit and the second floating power supply end of the power supply voltage stabilizing circuit are respectively connected with the second input and output end of the inductive circuit; the second end of the fourth switch unit and the power input end of the power voltage stabilizing circuit are respectively connected with a battery;
the power supply voltage stabilizing circuit is used for detecting input voltage, and when the input voltage is lower than a first preset voltage value, the first switch unit, the second switch unit, the third switch unit and the fourth switch unit work in a boost mode to improve the voltage value of the input voltage;
the first switching unit, the second switching unit, the third switching unit and the fourth switching unit are further used for working in a voltage reduction mode when the input voltage is higher than a second preset voltage value so as to reduce the voltage value of the input voltage;
and the first switch unit, the second switch unit, the third switch unit and the fourth switch unit work in a boosting mode or a voltage reduction mode when the input voltage is between a first preset voltage value and a second preset voltage value, so as to stabilize the voltage value of the input voltage.
2. The battery output voltage stabilizing circuit according to claim 1, wherein the battery output voltage stabilizing circuit further comprises a unidirectional conduction circuit, the power supply voltage stabilizing circuit further comprises a unidirectional conduction control signal output terminal, an input terminal of the unidirectional conduction circuit is connected with the first terminal of the first switching unit, an output terminal of the unidirectional conduction circuit is connected with a power consumption device, and a controlled terminal of the unidirectional conduction circuit is connected with the unidirectional conduction control signal output terminal of the power supply voltage stabilizing circuit.
3. The battery output voltage stabilizing circuit according to claim 2, wherein the power voltage stabilizing circuit includes a first bootstrap circuit, a second bootstrap circuit, a filter circuit, and a voltage stabilizing chip, the voltage stabilizing chip has a detection pin, a first control signal output pin, a second control signal output pin, a third control signal output pin, a fourth control signal output pin, a first switch pin, a second switch pin, a power pin, an external voltage input pin, an internal voltage stabilization output pin, a power ground, a first boost floating pin, and a second boost floating pin, the detection pin of the voltage stabilizing chip is a detection end of the power voltage stabilizing circuit, the first control signal output pin of the voltage stabilizing chip is a first control signal output end of the power voltage stabilizing circuit, the second control signal output pin of the voltage stabilizing chip is a second control signal output end of the power voltage stabilizing circuit, a third control signal output pin of the voltage stabilizing chip is a third control signal output end of the power supply voltage stabilizing circuit, a fourth control signal output pin of the voltage stabilizing chip is a fourth control signal output end of the power supply voltage stabilizing circuit, a power pin of the voltage stabilizing chip is connected with a first end of the filter circuit, an external voltage input pin of the voltage stabilizing chip is connected with a second end of the filter circuit, and an internal voltage stabilizing output pin of the voltage stabilizing chip is connected with a third end of the filter circuit; the power supply ground of the voltage stabilizing chip is suspended, a first boosting floating pin of the voltage stabilizing chip is connected with the input end of the first bootstrap circuit, a second boosting floating pin of the voltage stabilizing chip is connected with the input end of the second bootstrap circuit, a first switch pin of the voltage stabilizing chip and the output end of the first bootstrap circuit are respectively connected with the first end of the first switch unit, and a second switch pin of the voltage stabilizing chip and the output end of the second bootstrap circuit are respectively connected with the second end of the third switch unit; and the bootstrap end of the first bootstrap circuit is connected with the bootstrap end of the second bootstrap circuit.
4. The battery output voltage regulation circuit of claim 2 wherein the inductive circuit comprises a first inductor, a first terminal of the first inductor being a first input/output terminal of the inductive circuit, a second terminal of the first inductor being a second input/output terminal of the inductive circuit.
5. The battery output voltage stabilizing circuit of claim 1, wherein the first freewheel circuit includes a first diode, an anode of the first diode being a first end of the first freewheel circuit, and a cathode 2 of the first diode being a second end of the first freewheel circuit.
6. The battery output voltage stabilizing circuit according to claim 3, wherein the first bootstrap circuit comprises a second diode and a first capacitor, an anode of the second diode is a bootstrap terminal of the first bootstrap circuit, a cathode of the second diode is connected with a first terminal of the first capacitor, a connection node thereof is an input terminal of the first bootstrap circuit, and a second terminal of the first capacitor is an output terminal of the first bootstrap circuit.
7. The battery output voltage stabilizing circuit according to claim 3, wherein the filter circuit comprises a second capacitor, a third capacitor and a fourth capacitor, the first end of the second capacitor is the first end of the filter circuit, the second end of the second capacitor, the external voltage input pin of the voltage stabilizing chip and the first end of the third capacitor are respectively connected with the first end of the fourth capacitor, and the connection node is the second end of the filter circuit; and the second end of the third capacitor is connected with the second end of the fourth capacitor, and the connection node of the third capacitor is the third end connection of the filter circuit.
8. The battery output voltage stabilizing circuit according to any one of claims 1-7, wherein the first switching unit, the second switching unit, the third switching unit and the fourth switching unit employ N-type MOS transistors.
9. A discharge apparatus comprising a battery and a battery output voltage stabilizing circuit according to any one of claims 1 to 8.
10. A discharge system comprising a battery, a powered device, and a battery output regulation circuit as claimed in any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020720056.5U CN211786825U (en) | 2020-04-30 | 2020-04-30 | Battery output voltage stabilizing circuit, discharging equipment and discharging system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020720056.5U CN211786825U (en) | 2020-04-30 | 2020-04-30 | Battery output voltage stabilizing circuit, discharging equipment and discharging system |
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| Publication Number | Publication Date |
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| CN211786825U true CN211786825U (en) | 2020-10-27 |
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| CN202020720056.5U Expired - Fee Related CN211786825U (en) | 2020-04-30 | 2020-04-30 | Battery output voltage stabilizing circuit, discharging equipment and discharging system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115129106A (en) * | 2022-08-31 | 2022-09-30 | 深圳市倍轻松科技股份有限公司 | Heating circuit, control method, chip, electronic equipment and massager |
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2020
- 2020-04-30 CN CN202020720056.5U patent/CN211786825U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115129106A (en) * | 2022-08-31 | 2022-09-30 | 深圳市倍轻松科技股份有限公司 | Heating circuit, control method, chip, electronic equipment and massager |
| CN115129106B (en) * | 2022-08-31 | 2023-11-21 | 深圳市倍轻松科技股份有限公司 | Heating circuit, control method, chip, electronic equipment and massager |
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