CN214124885U - Charging control circuit and electronic equipment - Google Patents
Charging control circuit and electronic equipment Download PDFInfo
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- CN214124885U CN214124885U CN202023106024.5U CN202023106024U CN214124885U CN 214124885 U CN214124885 U CN 214124885U CN 202023106024 U CN202023106024 U CN 202023106024U CN 214124885 U CN214124885 U CN 214124885U
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Abstract
The utility model discloses a charge control circuit and electronic equipment, this charge control circuit includes: the device comprises a first switch, a second switch, a first load and a control module. According to the arrangement, when the control module detects that the residual electric quantity of the battery to be charged is lower than the first threshold value, the output first control signal is at a high level, so that the first switch and the second switch are conducted, and the power supply is used for charging the battery to be charged; when the control module detects that the residual electric quantity of the battery to be charged is higher than the second threshold value, the output first control signal is at a low level, so that the first switch and the second switch are cut off, and the power supply stops charging the battery to be charged.
Description
Technical Field
The utility model relates to an electronic circuit field, concretely relates to charge control circuit and electronic equipment.
Background
With the popularization of electronic products, the electronic products have a high demand for their own electric quantity, so that conventional electronic products are usually provided with a charging and discharging battery. In order to ensure the normal operation of the charge and discharge battery, the charge and discharge battery needs to be additionally managed.
SUMMERY OF THE UTILITY MODEL
Therefore, the to-be-solved technical problem of the utility model lies in overcoming the normal work of in order to guarantee charge-discharge battery among the prior art, needs additionally to carry out the problem of managing to charge-discharge battery to a charge control circuit and electronic equipment are provided.
In order to achieve the above object, an embodiment of the present invention provides a charging control circuit, which includes: a first end of the first switch is connected with a control end of the second switch, and a second end of the first switch is used for connecting a negative electrode of a battery to be charged; the first end of the second switch is used for being connected with a first power supply end of a power supply source, and the second end of the second switch is used for being connected with the anode of the battery to be charged; the first end of the first load is connected with the first end of the first switch and the control end of the second switch, and the second end of the first load is connected with the first end of the second switch; the control module is used for enabling the first switch to be turned on when the fact that the electric quantity of the battery to be charged is lower than a first threshold value is detected, and enabling the first switch to be turned off when the fact that the electric quantity of the battery to be charged is higher than a second threshold value is detected.
Optionally, the charging control circuit further comprises a third switch, a first end of the third switch is used for being connected with a first power supply end of the power supply through a first diode, a second end of the third switch is connected with a power supply end of the control module, and the power supply end of the control module is used for being connected with the first power supply end of the power supply; one end of the second load is connected with the first end of the third switch, and the other end of the second load is connected with the control end of the third switch; a first end of the fourth switch is connected with a control end of the third switch, and a second end of the fourth switch is grounded; the fourth switch is used for conducting when being closed, so that the control module is powered on; a first end of the fifth switch is connected with a control end of the third switch; the second end of the fifth switch is used for being connected with the negative electrode of the battery to be charged, the fifth switch is powered on the control module, and the control module is conducted when outputting a driving signal.
Optionally, the control terminal of the fifth switch is further configured to be connected to a second power supply terminal of the power supply.
Optionally, the charge control circuit further includes: a cathode of the second diode is connected with the first end of the third switch, and an anode of the second diode is used for connecting an anode of the battery to be charged; the second diode is used for supplying power to the control module by the battery to be charged when the first power supply end of the power supply is not available and the fourth power supply end is closed.
Optionally, the charge control circuit further includes: and one end of the first voltage stabilizing module is connected with the control end of the second switch, and the other end of the first voltage stabilizing module is connected with the first end of the second switch.
Optionally, the charge control circuit further includes: and one end of the second voltage stabilizing module is connected with the control end of the third switch, and the other end of the second voltage stabilizing module is connected with the first end of the third switch.
Optionally, the charge control circuit further includes: and the anode of the third diode is connected with the second end of the second switch, and the cathode of the third diode is connected with the anode of the battery to be charged.
Optionally, the method further comprises: the input end of the sampling module is suitable for being connected with the first power supply end of the power supply, and the output end of the sampling module is suitable for being connected with the control module.
Optionally, the method further comprises: and one end of the voltage division module is connected with the control module, and the other end of the voltage division module is connected with the battery to be charged.
The embodiment of the utility model provides a still provide an electronic equipment, this electronic equipment includes: a charge control circuit as in any preceding embodiment.
Compared with the prior art, the utility model, have following advantage:
1. the embodiment of the utility model provides a charge control circuit, this charge control circuit includes: the first end of the first switch is connected with the control end of the second switch, and the second end of the first switch is used for connecting the negative electrode of the battery to be charged; the first end of the second switch is used for being connected with a first power supply end of a power supply source, and the second end of the second switch is used for being connected with the anode of the battery to be charged; the first end of the first load is connected with the first end of the first switch and the control end of the second switch, and the second end of the first load is connected with the first end of the second switch; the power supply end of the control module is used for being connected with a first power supply end of the power supply; the control module is used for enabling the first switch to be turned on when the fact that the electric quantity of the battery to be charged is lower than a first threshold value is detected, and enabling the first switch to be turned off when the fact that the electric quantity of the battery to be charged is higher than a second threshold value is detected.
According to the arrangement, when the control module detects that the residual electric quantity of the battery to be charged is lower than the first threshold value, the output first control signal is at a high level, so that the first switch and the second switch are conducted, and the first power supply end of the power supply is used for charging the battery to be charged; when the control module detects that the residual electric quantity of the battery to be charged is higher than the second threshold value, the output first control signal is at a low level, so that the first switch and the second switch are cut off, and the first power supply end of the power supply stops charging the battery to be charged.
2. The embodiment of the utility model provides a through setting up third switch, fifth switch, second load and fourth switch, when the first supply end of connecting power supply, and when treating that rechargeable battery does not have the electricity, with the fourth switch closure, after control module got the electricity, control fifth switch switched on to the third switch switches on, so can be through the power supply for control module power supply.
3. The embodiment of the utility model provides a through the second feeder terminal that is used for connecting power supply with the control end of fifth switch, treat that the lower voltage that just probably can't satisfy control module start-up of rechargeable battery electric quantity, control module probably can't work this moment. When the second power supply end of the power supply is connected to the circuit, the second power supply end of the power supply can directly supply power to the control module and charge the battery to be charged. Thus, the circuit system can be ensured to work normally even if the fourth switch is not closed at the moment.
4. The embodiment of the utility model provides a through setting up the second diode, have the electricity when treating rechargeable battery, and when not connecting power supply's first supply end, close the fourth switch, after control module got the electricity, control fifth switch switched on to the third switch switches on, so can be through treating rechargeable battery for the control module power supply.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a circuit diagram of the embodiment of the present invention in a modularized manner;
fig. 2 is a circuit diagram of the embodiment of the present invention, which is fully modularized;
fig. 3 is a circuit diagram of the whole embodiment of the present invention.
Reference numerals:
a first switch 10; a second switch 20; a third switch 30; a fourth switch 40; a fifth switch 50; a sampling module 60; a voltage divider module 70; a first voltage stabilization module 80; a second voltage stabilization module 90;
a first resistor R1; a second resistor R2; a third resistor R3; a fourth resistor R4; a first load R5; a sixth resistor R6; a seventh resistor R7; an eighth resistor R8; a ninth resistor R9; a tenth resistor R10; an eleventh resistor R11; a twelfth resistor R12; a second load R13; a fourteenth resistance R14;
a first capacitance C1; a second capacitance C2; a third capacitance C3; a fourth capacitance C4; an electrolytic capacitor C12;
a first diode D1; a second diode D2; a third diode D3; a fourth diode D4;
a first MOS transistor Q2; a first transistor Q3; a second MOS transistor Q1; a second transistor Q4;
a first zener diode ZD 1; a second zener diode ZD 2;
a first power supply terminal VIN 1; a second power supply terminal VIN 2; a key switch S3; a battery to be charged BT 1;
a BC terminal; an AVL end; a BVL end; a VCC end; a DC terminal.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
Example 1
As shown in fig. 1, an embodiment of the present invention provides a charging control circuit, which includes a first switch 10, a second switch 20, a first load R5, and a control module. The control module comprises a BC end, an AVL end, a BVL end, a VCC end and a DC end. The BC terminal is configured to output a control signal to the first switch 10, the BVL terminal is configured to detect a voltage of the battery BT1 to be charged, the DC terminal is configured to output a control signal to the fifth switch 50, and the VCC terminal is configured to connect to the first power supply terminal VIN1 of the power supply, and supply power to the control module and the load of the electronic device. The AVL terminal is used for detecting the voltage of the first power supply terminal VIN1 of the power supply.
The control end of the first switch 10 is connected with the control module, the first end of the first switch 10 is connected with the control end of the second switch 20, and the second end of the first switch 10 is used for connecting the negative electrode of the battery to be charged BT 1. A first end of the second switch 20 is configured to be connected to a first power supply terminal VIN1 of a power supply, and a second end of the second switch 20 is configured to be connected to a positive electrode of the battery to be charged BT 1. A first terminal of a first load R5 is connected to the first terminal of the first switch 10 and the control terminal of the second switch 20, and a second terminal of the first load R5 is connected to the first terminal of the second switch 20.
After the first power supply end VIN1 of the power supply and the battery BT1 to be charged are connected, if the BVL end of the control module detects that the electric quantity of the battery BT1 to be charged is lower than a first threshold value, the BVL end of the control module indicates that the electric quantity of the battery BT1 to be charged is lower and needs to be charged. Thereby, the BC terminal of the control module outputs a high level, so that the first switch 10 is turned on. Current flows through the first power supply terminal VIN1 of the power supply and the first load R5 and the first switch 10, so that the second switch 20 is turned on, and the first power supply terminal VIN1 of the power supply can supply power to the battery BT1 to be charged. When the BVL terminal of the control module detects that the electric quantity of the battery to be charged BT1 is higher than the second threshold, a low level is output, the first switch 10 is turned off, the second switch 20 is turned off, and the first power supply terminal VIN1 of the power supply stops supplying power to the battery to be charged BT 1. It should be noted here that the first threshold is smaller than the second threshold.
Of course, as for the sizes of the first threshold and the second threshold, the first threshold may be 5%, and the second threshold may be 99%, and those skilled in the art may change according to the actual situation, and this technical solution is merely for example, and is not limited, and may perform the same technical function.
Example 2
As shown in fig. 1, in the embodiment of the present invention, the charging control circuit further includes a third switch 30, a fifth switch 50, a second load R13, and a fourth switch 40. The power supply terminal VCC of the control module is used for connecting the first power supply terminal VIN1 of the power supply. That is, the control module needs the first power supply terminal VIN1 of the power supply to provide the driving voltage.
As shown in fig. 1, a first end of the third switch 30 is configured to be connected to a first power supply terminal VIN1 of the power supply through a first diode D1, and a second end of the third switch 30 is connected to a power supply terminal VCC of the control module. A control terminal of the fifth switch 50 is connected with the DC terminal of the control module, and a first terminal of the fifth switch 50 is connected with a control terminal of the third switch 30; the second end of the fifth switch 50 is used for connecting the negative electrode of the battery to be charged BT 1. One end of the second load R13 is connected to the first end of the third switch 30, and the other end is connected to the control end of the third switch 30. A first terminal of the fourth switch 40 is connected to the control terminal of the third switch 30, and a second terminal is grounded.
Specifically, when the battery BT1 to be charged needs to be charged, the fourth switch 40 is first closed, and at this time, because current flows through the first power supply end VIN1, the second load R13 and the fourth switch 40 of the power supply, a voltage difference exists between two ends of the second load R13, so that the third switch 30 is turned on, and the first power supply end VIN1 of the power supply can supply power to the control module. After the control module is powered on, the control module detects the electric quantity of the battery to be charged BT 1. If the electric quantity of the battery to be charged BT1 is detected to be lower than a first threshold value, the electric quantity of the battery to be charged BT1 is low, and charging is needed. The control module thus outputs a high level, so that the first switch 10 is turned on. The current flows through the first power supply terminal VIN1 of the power supply, the first load R5 and the first switch 10, and the second switch 20 is turned on, so that the first power supply terminal VIN1 of the power supply can supply power to the battery BT1 to be charged. When the control module detects that the electric quantity of the battery to be charged BT1 is higher than a second threshold value, a low level is output, the first switch 10 is turned off, the second switch 20 is turned off, and therefore the first power supply end VIN1 of the power supply stops supplying power to the battery to be charged BT 1.
In the embodiment of the present invention, the control terminal of the fifth switch is also used for connecting the second power supply terminal VIN2 of the power supply. When the first power supply terminal VIN1 and the second power supply terminal VIN2 of the power supply have no access circuit and the battery to be charged is low, the whole system is powered by the battery to be charged BT 1.
However, if the battery to be charged is low, the voltage for starting the control module may not be satisfied, and at this time, the control module may not work. When the first power supply terminal VIN1 and the second power supply terminal VIN2 of the power supply are connected to the circuit at the same time, the power supply can directly supply power to the control module and charge the battery BT1 to be charged through the first power supply terminal VIN1 and the second power supply terminal VIN 2. In this way, it is ensured that the circuitry can operate normally even if the fourth switch 40 is not closed at this time.
The charging control circuit further comprises a second diode D2, wherein a cathode of the second diode D2 is connected with the first end of the third switch 30, and an anode of the second diode D2 is used for connecting an anode of the battery to be charged BT 1.
Specifically, when the battery to be charged BT1 is fully charged or the power is higher than the first threshold value, and the first power supply terminal VIN1 and the second power supply terminal VIN2 of the power supply are not connected to the circuit, the fourth switch 40 needs to be closed if the battery to be charged BT1 is needed to supply power to the control module and other loads of the electronic device. The battery BT1 to be charged supplies power to the control module and other loads of the electronic device. Similarly, when the fourth switch 40 is the key switch S3, the key switch S3 needs to be pressed, and the key switch S3 is closed. The third switch 30 is thus conductive and the battery to be charged BT1 can power the control module. After power is supplied, the control module outputs a high level to the fifth switch 50, so that the fifth switch 50 is turned on, and the third switch 30 can be maintained to be turned on.
Example 3
As shown in fig. 2, in the embodiment of the present invention, the charging control circuit further includes a sampling module 60, a voltage dividing module 70, a first voltage stabilizing module 80, and a second voltage stabilizing module 90.
In the embodiment of the present invention, one end of the first voltage stabilizing module 80 is connected to the control end of the second switch 20, and the other end is connected to the first end of the second switch 20. One end of the second voltage stabilizing module 90 is connected to the control end of the third switch, and the other end is connected to the first end of the third switch.
The input end of the sampling module 60 is adapted to be connected to the first power supply terminal VIN1 of the power supply, and the output end of the sampling module 60 is adapted to be connected to the AVL terminal of the control module. One end of the voltage dividing module 70 is connected with the BVL end of the control module, and the other end of the voltage dividing module 70 is connected with the battery to be charged BT 1.
Example 4
As shown in fig. 3, in the embodiment of the present invention, the first switch 10 includes an eighth resistor R8, a seventh resistor R7, and a first transistor Q3, and the second switch 20 is a first MOS transistor Q2. The third switch 30 may be a second MOS transistor Q1, and the fifth switch 50 may include a second transistor Q4, a fifteenth resistor R15, a sixteenth resistor R16, and a seventeenth resistor R17. The sampling module 60 includes a first resistor R1, a second resistor R2, a third resistor R3, and a second capacitor C2. The voltage dividing module 70 includes a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, and a third capacitor C3. The first zener module 80 is a first zener diode ZD1, and the second zener module 90 may be a second zener diode ZD 2.
Specifically, a control end of the first triode Q3 is connected to one end of an eighth resistor R8, and the other end of the eighth resistor R8 is connected to the BC end of the control module; the first end of the first triode Q3 is connected with one end of a sixth resistor R6, the other end of the sixth resistor R6 is connected with the control end of a first MOS transistor Q2, and the second end of the first triode Q3 is used for connecting the negative electrode of the battery to be charged BT 1. In the embodiment of the present invention, the second terminal of the first transistor Q3 and the negative electrode of the battery to be charged BT1 are both grounded.
Then, as shown in fig. 3, a first end of a first MOS transistor Q2 is sequentially connected in series with a ninth resistor R9 and a fourth resistor R4, the other end of the fourth resistor R4 is used for connecting a first power supply terminal VIN1 of the power supply, a second end of the first MOS transistor Q2 is connected with an anode of a third diode D3, and a cathode of the third diode D3 is used for connecting an anode of the battery to be charged BT 1.
As shown in fig. 3, specifically, the control terminal of the second MOS transistor Q1 is connected to one terminal of a fourteenth resistor R14, the other terminal of the fourteenth resistor R14 is connected to the anode of a fourth diode D4, the cathode of the fourth diode is connected to one terminal of the fourth switch 40, and the other terminal of the fourth switch 40 is grounded. The fourth switch 40 may be a key switch S3, the key switch S3 being closed when depressed and open when released. The first end of the second MOS transistor Q1 is used for connecting the first power supply end VIN1 of the power supply and the battery BT1 to be charged, and the second end of the second MOS transistor Q1 is connected with the power supply end VCC of the control module.
As shown in fig. 3, the control terminal of the second triode Q4 is connected to the fifteenth resistor R15, the sixteenth resistor R16 and the seventeenth resistor R17, the other terminal of the sixteenth resistor R16 is connected to the control module, the other terminal of the fifteenth resistor R15 is used for connecting to the second power supply terminal VIN2 of the power supply, and the other terminal of the seventeenth resistor is grounded. A first end of the second transistor Q4 is connected to an anode of the fourth diode D4, and a second end of the second transistor Q4 is connected to a cathode of the battery to be charged BT 1. In the embodiment of the present invention, the second terminal of the second transistor Q4 is grounded.
The embodiment of the utility model provides a through the control end with second triode Q4 in proper order with fifteenth resistance R15, power supply 'S second feed end VIN2 establish ties, have power supply' S second feed end VIN2 input, can need not control through key switch S3 and supply power for control module and load, can directly guarantee the normal function of system.
In the embodiment of the present invention, the cathode of the first zener diode ZD1 is connected to the first end of the first MOS transistor Q2, and the anode is connected to the control end of the first MOS transistor Q2. The cathode of the second zener diode ZD2 is connected to the first end of the second MOS transistor Q1, and the anode is connected to the control end of the second MOS transistor Q1.
In the charging control circuit, a jumper J is suitable for connecting the source electrode and the drain electrode of the second MOS tube Q1. When jumper wires are connected to the source and the drain of the second MOS transistor Q1, the first power supply terminal VIN1 of the power supply and the battery to be charged BT1 can be directly connected to the power supply terminal VCC of the control module.
The charge control circuit further includes an electrolytic capacitor C12 and a first capacitor C1. One end of the electrolytic capacitor C12 is used for connecting with a first power supply end VIN1 of a power supply, and the other end is grounded. One end of the first capacitor C1 is used for connecting a first power supply terminal VIN1 of a power supply, and the other end is grounded.
As shown in fig. 3, one end of the first resistor R1 is used for connecting a first power supply terminal VIN1 of a power supply, the other end is connected to the third resistor R3, and the other end of the third resistor R3 is grounded. The AVL end of the control module is connected with a second resistor R2, and the other end of the second resistor R2 is connected between the first resistor R1 and the third resistor R3. One end of the second capacitor C2 is connected to the AVL end of the control module, and the other end of the second capacitor C2 is grounded.
One end of the eleventh resistor R11 is connected with the positive electrode of the battery to be charged BT1, the other end of the eleventh resistor R11 is connected with the twelfth resistor R12, and the other end of the twelfth resistor R12 is connected with the negative electrode of the battery to be charged BT 1. The negative electrode of the battery to be charged BT1 is grounded. One end of the tenth resistor R10 is connected to the BVL end of the control module, and the other end is connected between the eleventh resistor R11 and the twelfth resistor R12. One end of the third capacitor C3 is connected to the BVL end of the control module, and the other end is grounded.
As shown in fig. 3, the charging control circuit further includes a fourth resistor R4 and a ninth resistor R9, one end of the fourth resistor R4 is used for connecting a first power supply terminal VIN1 of a power supply, the other end is connected with a ninth resistor R9, and the other end of the ninth resistor R9 is connected with a first end of the first MOS transistor Q2.
As shown in fig. 3, the specific working process of the embodiment of the present invention is as follows:
the first power supply terminal VIN1 of the power supply and the battery to be charged BT1 supply power to the power supply terminal VCC of the control module through the second MOS transistor Q1, and the load also needs to be supplied with power through the power supply terminal VCC.
1. When the first power supply terminal VIN1 and the second power supply terminal VIN2 of the power supply are inputted.
Because the second power supply end VIN2 of the power supply is inputted, the current flows to the fifteenth resistor R15, the seventeenth resistor R17 to the ground in sequence through the first power supply end VIN1 of the power supply. The base of the second transistor Q4 has a high input, causing the second transistor Q4 to turn on. In this way, the current flows to the first diode D1, the second load R13, the fourteenth resistor R14, and the second transistor Q4 to the ground in sequence through the first power supply terminal VIN1 of the power supply, so that a voltage drop exists between the gate and the source of the second MOS transistor Q1, and the second MOS transistor Q1 can be continuously turned on. The first power supply terminal VIN1 of the power supply can continuously supply power to the control module and the load.
After the control module is powered on, the electric quantity of the battery to be charged BT1 is detected through the BVL terminal, and when the electric quantity of the battery to be charged BT1 is detected to be lower than a first threshold value, the electric quantity of the battery to be charged BT1 is low, and charging is needed. The BC terminal of the control module outputs a high level, so that the first transistor Q3 is turned on. The current flows to the fourth resistor R4, the ninth resistor R9, the first load R5, the sixth resistor R6, and the first triode Q3 to the ground in sequence through the first power supply terminal VIN1 of the power supply, so that a voltage drop exists between the gate and the source of the first MOS transistor Q2, and the first MOS transistor Q2 is turned on. In this way, current flows to the fourth resistor R4, the ninth resistor R9, the first MOS transistor Q2, the third diode D3, and the battery BT1 to be charged to the ground in sequence through the first power supply terminal VIN1 of the power supply, so that the first power supply terminal VIN1 of the power supply can charge the battery BT1 to be charged. When the BVL terminal detects that the electric quantity of the battery BT1 to be charged is higher than the second threshold value, the BC terminal of the control module outputs a low level, the first triode Q3 is cut off, and the first MOS transistor Q2 is cut off, so that the first power supply terminal VIN1 of the power supply stops supplying power to the battery BT1 to be charged. Due to the existence of the second diode D2, the electric energy of the battery to be charged BT1 will not flow to the control module and the load, so that the battery to be charged BT1 enters the low power consumption mode, and the service time can be greatly prolonged.
2. When there is no input of the first power supply terminal VIN1 and the second power supply terminal VIN2 of the power supply.
Because the control module is not powered, the control terminal of the second transistor Q4 has no high level input, so the second transistor Q4 is turned off, and the second MOS transistor Q1 is turned off. At this time, if power is supplied to the load and the control module through the battery to be charged BT1, the key switch S3 is pressed, and then the current flows through the battery to be charged BT1 to the second diode D2, the second load R13, the fourteenth resistor R14, the fourth diode D4, and the key switch S3 to the ground in sequence. Therefore, a voltage exists across the second load R13, the second MOS transistor Q1 is turned on, and the battery to be charged BT1 is turned on with the power supply terminal VCC of the control module, so that the battery to be charged BT1 can supply power to the control module and the load.
After the power is supplied, the control module outputs a high level through the DC terminal, so that the second triode Q4 is conducted. In this way, the current flows to the second diode D2, the second load R13, the fourteenth resistor R14 and the second transistor Q4 in sequence through the battery to be charged BT1 to form a loop to the ground, so the second MOS transistor Q1 can be continuously conducted, and the battery to be charged BT1 can continuously supply power to the control module and the load. When the key switch S3 rebounds, the second MOS transistor Q1 is not turned off.
Example 5
The embodiment of the utility model provides a still provide an electronic equipment, this electronic equipment includes: a charge control circuit as in any preceding embodiment.
The electronic equipment can be a fan, a humidifier and other low-power household appliances.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.
Claims (10)
1. A charge control circuit, comprising:
a first switch (10), wherein a first end of the first switch (10) is connected with a control end of a second switch (20), and a second end of the first switch (10) is used for connecting a negative electrode of a battery to be charged (BT 1);
the second switch (20), a first end of the second switch (20) is used for connecting a first power supply end (VIN1) of a power supply, and a second end of the second switch (20) is used for connecting with a positive electrode of the battery to be charged (BT 1);
a first load (R5), a first terminal of the first load (R5) being connected to the first terminal of the first switch (10) and the control terminal of the second switch (20), a second terminal of the first load (R5) being connected to the first terminal of the second switch (20);
a control module for turning on the first switch (10) when detecting that the charge of the battery to be charged (BT1) is lower than a first threshold value, and turning off the first switch (10) when detecting that the charge of the battery to be charged (BT1) is higher than a second threshold value.
2. The charge control circuit of claim 1, further comprising:
a third switch (30), a first end of the third switch (30) is used for connecting a first power supply end (VIN1) of the power supply through a first diode, a second end of the third switch (30) is connected with a power supply end (VCC) of the control module, and the power supply end (VCC) of the control module is used for connecting a first power supply end (VIN1) of the power supply;
a second load (R13) having one end connected to a first end of the third switch (30) and the other end connected to a control end of the third switch (30);
a fourth switch (40), a first end of which is connected with the control end of the third switch (30), and a second end of which is grounded; the fourth switch (40) is used for conducting when closed, so that the control module is electrified;
a fifth switch (50), a first terminal of the fifth switch (50) being connected to a control terminal of the third switch (30); the second end of the fifth switch (50) is used for being connected with the negative electrode of the battery to be charged (BT1), the fifth switch (50) is electrified in the control module, and the control module is conducted when a driving signal is output.
3. The charge control circuit according to claim 2, wherein the control terminal of the fifth switch (50) is further configured to be connected to a second power supply terminal (VIN2) of the power supply.
4. The charge control circuit according to claim 2 or 3, further comprising:
a second diode (D2), a cathode of the second diode (D2) being connected with a first end of the third switch (30), an anode of the second diode (D2) being for connecting an anode of the battery to be charged (BT 1); the second diode (D2) is used for supplying power to the control module by the battery to be charged (BT1) when the first power supply end (VIN1) of the power supply source is not connected and the fourth switch (40) is closed.
5. The charge control circuit according to any one of claims 1 to 3, further comprising:
and one end of the first voltage stabilizing module (80) is connected with the control end of the second switch (20), and the other end of the first voltage stabilizing module is connected with the first end of the second switch (20).
6. The charge control circuit of claim 2, further comprising:
and one end of the second voltage stabilizing module (90) is connected with the control end of the third switch (30), and the other end of the second voltage stabilizing module is connected with the first end of the third switch (30).
7. The charge control circuit according to any one of claims 1 to 3, further comprising:
a third diode (D3), an anode of the third diode (D3) is connected with the second end of the second switch (20), and a cathode of the third diode (D3) is connected with an anode of the battery to be charged (BT 1).
8. The charge control circuit according to any one of claims 1 to 3, further comprising:
a sampling module (60), wherein an input end of the sampling module (60) is suitable for being connected with a first power supply end (VIN1) of the power supply, and an output end of the sampling module (60) is suitable for being connected with the control module.
9. The charge control circuit according to any one of claims 1 to 3, further comprising:
one end of the voltage dividing module (70) is connected with the control module, and the other end of the voltage dividing module (70) is connected with the battery to be charged (BT 1).
10. An electronic device, comprising: a charge control circuit according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023106024.5U CN214124885U (en) | 2020-12-21 | 2020-12-21 | Charging control circuit and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023106024.5U CN214124885U (en) | 2020-12-21 | 2020-12-21 | Charging control circuit and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214124885U true CN214124885U (en) | 2021-09-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023106024.5U Active CN214124885U (en) | 2020-12-21 | 2020-12-21 | Charging control circuit and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214124885U (en) |
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2020
- 2020-12-21 CN CN202023106024.5U patent/CN214124885U/en active Active
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