CN216774311U - Load driving chip - Google Patents
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- CN216774311U CN216774311U CN202122408804.3U CN202122408804U CN216774311U CN 216774311 U CN216774311 U CN 216774311U CN 202122408804 U CN202122408804 U CN 202122408804U CN 216774311 U CN216774311 U CN 216774311U
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Abstract
The application discloses a load driving chip, wherein a power supply end of the load driving chip is connected with a positive electrode of an external power supply; the first external connection end is used for being connected with the positive pole of a load and the positive pole of a battery, the second external connection end is used for being connected with the negative pole of the load, and the third external connection end is used for being connected with a grounding resistor; the load driving chip includes: the charging switch circuit is used for providing a charging path of an external power supply to the battery; the charging management circuit is used for sending a charging control signal to the charging switch circuit so as to control the on-off of the charging path; the load driving circuit is used for providing a discharge path of the battery to the load; and the discharge management circuit is used for sending a discharge control signal to the load driving circuit so as to control the on-off of the discharge path. This application has integrated the circuit of multiple functions with reasonable effectual circuit structure, has possessed the ability of battery charge-discharge management and load drive management simultaneously, and the security is high, the reliability is high, the integrated level is high, has reduced equipment volume and cost, has greatly improved product economic benefits.
Description
Technical Field
The present application relates to the field of electronic technologies, and in particular, to a load driving chip.
Background
With the development of new energy technology and battery technology, many outdoor loads such as lighting equipment and the like can be powered by batteries, and the batteries are repeatedly charged by using new energy power generation, so that a power supply network does not need to be laid and is powered by commercial power, energy conservation and environmental protection are realized, the installation is more convenient, and the development of green and economical economy is greatly facilitated.
However, in the current practical application, the structures of some load driving circuits are not perfect, and the charging and discharging of the battery cannot be effectively managed, or a plurality of chips are needed to be used simultaneously to respectively realize the charging and discharging management of the battery, the driving of the LED, and the like, so that the equipment cost is high, the size is large, and the reliability is poor.
In view of the above, it is an important need for those skilled in the art to provide a solution to the above technical problems.
SUMMERY OF THE UTILITY MODEL
The application aims to provide a load driving chip with high reliability and high safety.
In order to solve the technical problem, the application discloses a load driving chip, wherein a power supply end of the load driving chip is used for being connected with a positive electrode of an external power supply; the first external connection end of the load driving chip is used for being connected with a positive electrode of a load and a positive electrode of a battery respectively, the second external connection end is used for being connected with a negative electrode of the load, and the third external connection end is used for being connected with a grounding resistor; the load driving chip includes:
the charging switch circuit is coupled between the power supply end and the first external connection end and used for providing a charging path for the external connection end to supply power to the battery;
the charging management circuit is connected with the charging switch circuit and is used for sending a charging control signal to the charging switch circuit so as to control the on-off of the charging path;
the load driving circuit is coupled between the second external connection end and the third external connection end and used for providing a discharging path of the battery to the load;
and the discharge management circuit is connected with the load driving circuit and is used for sending a discharge control signal to the load driving circuit so as to control the on-off of the discharge path.
Optionally, the method further comprises:
and the reference circuit is respectively connected with the charging management circuit and the discharging management circuit and is used for providing reference voltage and bias current.
Optionally, the charging switch circuit includes a first switch tube; the first switch tube is connected between the power supply end and the first external end, and the control end of the first switch tube is connected with the charging management circuit;
the charge management circuit is configured to: and judging charging conditions based on the power supply voltage of the external power supply and the battery voltage of the battery, controlling the first switching tube to be closed when all the charging conditions are met, and controlling the first switching tube to be switched off when any one of the charging conditions is not met.
Optionally, the charging conditions include:
the power supply voltage is greater than a preset power supply access voltage threshold, the power supply voltage is greater than the battery voltage, and the battery voltage is less than a preset overcharge protection voltage threshold.
Optionally, the load driving circuit includes a second switching tube and an operational amplifier; the second switch tube is connected between the second external connection end and the third external connection end;
the output end of the operational amplifier is connected with the control end of the second switch tube, the enable end of the operational amplifier is connected with the discharge management circuit, the positive input end of the operational amplifier is connected with the reference voltage output end of the reference circuit, and the negative input end of the operational amplifier is connected with the third external end of the reference circuit and used for controlling the on-off of the second switch tube and realizing constant current driving;
the discharge management circuit is configured to: and judging the discharging conditions based on the power supply voltage of the external power supply and the battery voltage of the battery, sending an enabling starting signal to the operational amplifier when each discharging condition is met, and sending an enabling closing signal to the operational amplifier when any discharging condition is not met.
Optionally, the discharge condition comprises:
the power supply voltage is smaller than a preset power supply access voltage threshold, and the battery voltage is larger than a preset over-discharge protection voltage threshold.
Optionally, the discharge management circuit includes a discharge management module and a locking and unlocking module connected to each other; the output end of the locking and unlocking module is connected with the enabling end of the operational amplifier;
the discharge management module is used for: sending a first comparison result signal of the power supply voltage and the power supply access voltage threshold value and a second comparison result signal of the battery voltage and the over-discharge protection voltage threshold value to the locking and unlocking module;
the locking and unlocking module is used for: sending the enable starting signal to the operational amplifier when each discharging condition is met, and sending the enable closing signal to the operational amplifier when any discharging condition is not met; and the locking and unlocking module is also used for locking the current output state after outputting an enable closing signal when the voltage of the battery is not greater than the over-discharge protection voltage threshold value until the locking is released after the power supply voltage is greater than the power supply access voltage threshold value or the battery is charged again.
Optionally, the charging management circuit is coupled to the power source end through a power source reverse connection prevention module, so that the charging management circuit stops working when the external power source is reversely connected.
Optionally, the charging management circuit and the discharging management circuit are coupled to the first external terminal through a battery reverse connection prevention module, so that the charging management circuit and the discharging management circuit stop working when the external power supply is reversely connected.
Optionally, the reference circuit further comprises:
and the reset module is used for generating and outputting a reset zero clearing signal with the duration being a preset value after the battery is powered on.
The load driving chip provided by the application has the beneficial effects that: this application has integrated the circuit of multiple functions with reasonable effectual circuit structure, has possessed the ability of battery charge-discharge management and load drive management simultaneously, and not only the security is high, the reliability is high, has higher integrated level moreover, has reduced equipment volume and cost, has greatly improved product economic benefits.
Drawings
In order to more clearly illustrate the technical solutions in the prior art and the embodiments of the present application, the drawings that are needed to be used in the description of the prior art and the embodiments of the present application will be briefly described below. Of course, the following description of the drawings related to the embodiments of the present application is only a part of the embodiments of the present application, and it will be obvious to those skilled in the art that other drawings can be obtained from the provided drawings without any creative effort, and the obtained other drawings also belong to the protection scope of the present application.
Fig. 1 is a schematic circuit diagram of a load driving chip according to an embodiment of the present disclosure;
fig. 2 is a schematic circuit diagram of another load driving chip according to an embodiment of the present disclosure.
Detailed Description
The core of the application lies in providing a high-reliability and high-safety load driving chip.
In order to more clearly and completely describe the technical solutions in the embodiments of the present application, the technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
With the development of new energy technology and battery technology, many outdoor loads such as lighting equipment and the like can be powered by batteries, and the batteries are repeatedly charged by using new energy power generation, so that a power supply network does not need to be laid and powered by mains supply, and the novel solar energy battery is energy-saving, environment-friendly, convenient to install and greatly beneficial to the development of green economical economy.
However, in the current practical application, the structures of some load driving circuits are not perfect, and the charging and discharging of the battery cannot be effectively managed, or a plurality of chips are needed to be used simultaneously to respectively realize the charging and discharging management of the battery, the driving of the LED, and the like, so that the equipment cost is high, the size is large, and the reliability is poor. In view of this, the present application provides a load driving chip, which can effectively solve the above problems.
Referring to fig. 1, an embodiment of the present application discloses a load driving chip 100, wherein a power supply terminal of the load driving chip 100 is used for being connected to a positive electrode of an external power supply E; a first external connection end of the load driving chip 100 is used for being connected with a positive electrode of a load and a positive electrode of a Battery (Battery), a second external connection end is used for being connected with a negative electrode of the load, and a third external connection end is used for being connected with a grounding resistor Rs; the load driving chip includes:
a charging switch circuit 101 coupled between a power source terminal and a first external terminal for providing a charging path of an external power source E to the battery;
the charging management circuit 102 is connected to the charging switch circuit 101 and configured to send a charging control signal to the charging switch circuit 101 to control on/off of a charging path;
the load driving circuit 103 is coupled between the second external connection end and the third external connection end and is used for providing a discharge path of the battery to the load;
and the discharge management circuit 104 is connected with the load driving circuit 103 and used for sending a discharge control signal to the load driving circuit 103 so as to control the on-off of a discharge path.
The external power supply E can adopt various new energy power supplies, such as a solar panel and the like; the battery is a rechargeable battery capable of powering a load; the load can be set by the user according to the requirements of the actual application. For example, in a very common application scenario of outdoor lighting, the load shown in fig. 1 is embodied as a Light Emitting Diode (LED). LEDs have low operating voltages, low operating currents, good shock and vibration resistance, long lifetimes, and high reliability compared to incandescent bulbs, and are therefore gradually replacing incandescent bulbs for use in lighting devices.
The load driving chip provided by the present application is provided with five pins, as shown in fig. 1, pin 4 is a power supply end thereof, and is used for being connected with an anode output end of an external power supply E; the pin 3 is a first external connection end and is used for being connected with the positive electrode of the battery and the positive electrode of the load; the pin 5 is a second external terminal and is used for being connected with the negative pole of the load; the pin 1 is a third external connection end for connecting with a ground resistor.
It is easy to understand that an integrated circuit needs to be grounded with its external circuit, therefore, the pin 2 provided in this application is the ground GND, and is connected to the negative pole of the external power supply, the negative pole of the battery, and the ground of the ground resistor to be grounded. In addition, it is easy to understand that in order to ensure the stable voltage of the battery and the high reliability of the load operation, a capacitor Co connected in parallel with the battery can be additionally arranged in the external circuit.
It should be noted that, in the load driving chip provided by the present application, a charging switch circuit, a charging management circuit, a load driving circuit, and a discharging management circuit are integrated. The charging switch circuit is communicated with a charging channel of the external power supply to the battery, and when the battery needs to be charged, the charging management circuit can automatically control the charging switch circuit to be switched on, so that the battery is charged. When the charging condition is not satisfied, the charging management circuit can disconnect the charging switch circuit to stop charging the battery, so as to prevent the occurrence of faults.
The load driving circuit is communicated with the load and the grounding resistor, and when the load is required to be driven to work, the discharge management circuit can automatically control the load driving circuit to be switched on, so that a discharge path which is connected with the battery, the load and the grounding resistor in series is closed, and the load is driven, namely the battery is discharged. When the discharging condition is not met, the discharging management circuit can enable the load driving circuit not to work, the driving of the load is stopped, and the battery, the load and even the load driving chip are prevented from being damaged due to faults.
It can be seen that the load driving chip that this application provided to reasonable effectual circuit structure has integrated the circuit of multiple functions, has possessed the ability of battery charge-discharge management and load drive management simultaneously, and not only the security is high, the reliability is high, has higher integrated level moreover, has reduced equipment volume and cost, has greatly improved product economic benefits.
Referring to fig. 2, fig. 2 is a schematic circuit structure diagram of another load driving chip according to an embodiment of the present disclosure.
As a specific embodiment, the load driving chip provided in the embodiment of the present application further includes, on the basis of the foregoing content:
and a reference circuit 105 connected to the charge management circuit 102 and the discharge management circuit 104, respectively, for providing a reference voltage and a bias current.
As will be readily appreciated by those skilled in the art, in practical applications, the implementation of various functional circuits often requires the use of reference voltages, bias currents. The charging management circuit and the discharging management circuit in the application need to monitor and judge the voltage and the like of an external power supply and a battery, and some basic components needed to be used in the circuits need to be provided with reference voltage and bias current by the reference circuit.
As a specific embodiment, in the load driving chip provided in the embodiment of the present application, on the basis of the foregoing, the charging switch circuit includes a first switch tube Q1; the first switch tube is connected between the power supply end and the first external end, and the control end of the first switch tube is connected with the charging management circuit;
the charge management circuit is used for: the charging condition is judged based on the power supply voltage of the external power supply and the battery voltage of the battery, the first switching tube is controlled to be closed when all the charging conditions are met, and the first switching tube is controlled to be turned off when any one of the charging conditions is not met. Specifically, the first switch tube may be a Metal Oxide Semiconductor (MOS) transistor.
As a specific embodiment, in the load driving chip provided in the embodiment of the present application, on the basis of the foregoing, the charging condition includes:
the power supply voltage is greater than a preset power supply access voltage threshold, the power supply voltage is greater than the battery voltage, and the battery voltage is less than a preset overcharge protection voltage threshold.
Specifically, the power voltage is greater than the preset power access voltage threshold, which is a basis for determining that the external power supply has been normally accessed to the load driving chip. And when the power supply voltage is less than the battery voltage, the charging is stopped, so that the battery can be prevented from recharging current to charge an external power supply, and the safety and the service life of the LED driving chip are improved. Therefore, the battery can be charged only when the external power supply is normally connected and the power supply voltage of the external power supply is greater than the battery voltage.
On the basis, the embodiment of the application is also provided with overcharge protection, namely, in order to prevent the battery voltage from being charged too high to exceed the safe working range of the battery and endanger the circuit safety, when the battery voltage is greater than the overcharge protection voltage threshold, the charging is stopped.
It is easy to understand that, when the three charging conditions, that is, the power supply voltage is greater than the preset power access voltage threshold, the power supply voltage is greater than the battery voltage, and the battery voltage is less than the preset overcharge protection voltage threshold, are all satisfied, the charging management circuit closes the charging switch circuit to charge the battery. When any one of the charging conditions is not satisfied, the charging management circuit disconnects the charging switch circuit to stop charging the battery.
As a specific embodiment, on the basis of the above, the load driving circuit provided in the embodiment of the present application includes a second switching tube Q2 and an operational amplifier a; the second switch tube is connected between the second external connection end and the third external connection end;
the output end of the operational amplifier is connected with the control end of the second switch tube, the enable end is connected with the discharge management circuit, the positive input end is connected with the reference voltage output end of the reference circuit, and the negative input end is connected with the third external end and used for controlling the on-off of the second switch tube and realizing constant current driving;
the discharge management circuit is used for: and judging the discharging conditions based on the power supply voltage of the external power supply and the battery voltage of the battery, sending an enabling starting signal to the operational amplifier when each discharging condition is met, and sending an enabling closing signal to the operational amplifier when any discharging condition is not met.
Specifically, the second switching tube may also adopt a MOS tube. According to the virtual short principle of the operational amplifier, the voltages of the negative input end and the positive input end are equal and are the reference voltages output by the reference circuit. That is, the voltage of the third external terminal of the load driving chip provided by the present application is not changed by the peripheral circuit (or the load size). When the grounding resistance is also fixed, the current of the discharging path where the load and the battery are located is fixed, and is the ratio of the reference voltage to the resistance value of the grounding resistance. Thus, constant current driving of the load can be realized.
As a specific embodiment, the load driving chip provided in the embodiment of the present application, on the basis of the foregoing, the discharge condition includes:
the power supply voltage is less than a preset power supply access voltage threshold, and the battery voltage is greater than a preset over-discharge protection voltage threshold.
Specifically, when a load is driven by discharging a battery, the battery cannot be charged by an external power source. Therefore, the discharge is required to be performed when the power supply voltage is less than the preset power supply access voltage threshold. In addition, the embodiment of the present application further provides an over-discharge protection for the battery, that is, in order to prevent the battery from discharging too much to cause too low battery voltage, when the battery voltage is less than the over-discharge protection voltage threshold, the embodiment stops the operation of the load driving circuit, that is, stops the driving of the battery to the load.
It is easy to understand that, when the two discharging conditions that the power supply voltage is smaller than the preset power supply access voltage threshold and the battery voltage is larger than the preset over-discharge protection voltage threshold are both satisfied, the discharging management circuit controls the load driving circuit to work, so that the battery discharges to drive the load. When any one of the discharge conditions is not satisfied, the discharge management circuit stops the operation of the load driving circuit to stop the discharge of the battery.
As a specific embodiment, on the basis of the above content, the discharge management circuit of the load driving chip provided in the embodiment of the present application includes a discharge management module and a lock-unlock module that are connected to each other; the output end of the locking and unlocking module is connected with the enabling end of the operational amplifier;
the discharge management module is used for: sending a first comparison result signal of the power supply voltage and a power supply access voltage threshold value and a second comparison result signal of the battery voltage and an over-discharge protection voltage threshold value to a locking and unlocking module;
the locking and unlocking module is used for: sending an enable starting signal to the operational amplifier when each discharging condition is met, and sending an enable closing signal to the operational amplifier when any discharging condition is not met; and the locking and unlocking module is also used for locking the current output state after outputting the enable close signal when the battery voltage is not greater than the over-discharge protection voltage threshold value until the locking is released when the power supply voltage is greater than the power supply access voltage threshold value or the battery is charged again.
Specifically, the battery voltage has a "false low" problem, that is, when the battery drives the load in a low voltage state, the battery voltage measured at this time is a value one lower than the over-discharge protection voltage threshold, and when the discharge circuit is disconnected and the load is not driven any more, the battery voltage is likely to immediately slightly rise to a value two higher than the over-discharge protection voltage threshold.
In order to prevent the load driving circuit from repeatedly stopping and starting due to the problem of low battery voltage, the embodiment of the application is further provided with a stop state locking mechanism after over-discharge protection. Namely, after the battery discharge is stopped because the battery voltage is lower than the over-discharge protection voltage threshold, the locking and unlocking module locks the output state, and the output state is not changed because the battery voltage is higher than the over-discharge protection voltage threshold. Only when the external power supply is detected to be connected again or the external power supply charges the battery again, the output locking state of the locking and unlocking module is released, and the operational amplifier is enabled normally according to the standard whether each discharging condition is met.
As a specific embodiment, in the load driving chip provided in this embodiment of the present application, on the basis of the above content, the charging management circuit is coupled to the power source terminal through the power source reverse connection preventing module, so that the charging management circuit stops working when the external power source is reversely connected.
Specifically, each function circuit integrated in the load driving chip comprises a plurality of basic components, and in order to prevent the components from being damaged when the positive electrode and the negative electrode of the external power supply are connected reversely, the embodiment of the application is provided with a power reverse connection preventing circuit. The anti-power source reverse connection circuit can play a role of unidirectional conduction similar to a diode, and stops the work of related circuits when an external power source is reversely connected, thereby effectively providing protection.
As a specific embodiment, in the load driving chip provided in this embodiment of the present application, on the basis of the above content, the charging management circuit and the discharging management circuit are coupled to the first external terminal through the battery reverse connection preventing module, so that the charging management circuit and the discharging management circuit stop working when the external power supply is reversely connected.
Similarly, in order to prevent the damage of the load or the device in the chip caused by the reverse connection of the positive electrode and the negative electrode of the battery, a battery reverse connection preventing circuit is further arranged in the embodiment of the application. The anti-battery reverse connection circuit can also play a role of unidirectional conduction similar to a diode, and can effectively protect the chip when the battery is reversely connected.
As a specific embodiment, on the basis of the foregoing, the reference circuit of the load driving chip provided in the embodiment of the present application further includes:
and the reset module is used for generating and outputting a reset zero clearing signal with the duration as a preset value after the battery is powered on.
Specifically, when the battery is powered on for the first time, the reset module generates a reset signal for resetting and resetting the state of the register in each functional circuit, so that the load driving chip is restored to a certain set default state. The reset signal can be low-level reset or high-level reset; also, the reset signal may last only for a certain preset duration. After the preset duration is over, the reset signal can disappear, and the load driving chip can enter a default battery discharge management state.
The preset value of the duration of the reset signal may be 80 milliseconds. The reset signal disappears, namely the high-low level inversion occurs to the reset signal: if the reset signal is reset at low level, the reset signal disappears, namely the original low level is changed into high level; if the reset signal is a high level reset, the reset signal disappears, i.e., the original high level is changed into a low level.
The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the equipment disclosed by the embodiment, the description is relatively simple because the equipment corresponds to the method disclosed by the embodiment, and the relevant parts can be referred to the method part for description.
It is further noted that, throughout this document, relational terms such as "first" and "second" are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Furthermore, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The technical solutions provided by the present application are described in detail above. The principles and embodiments of the present application are explained herein using specific examples, which are provided only to help understand the method and the core idea of the present application. It should be noted that, for those skilled in the art, without departing from the principle of the present application, the present application can also make several improvements and modifications, and those improvements and modifications also fall into the protection scope of the present application.
Claims (10)
1. A load driving chip is characterized in that a power supply end of the load driving chip is used for being connected with the anode of an external power supply; the first external connection end of the load driving chip is used for being connected with a positive electrode of a load and a positive electrode of a battery respectively, the second external connection end is used for being connected with a negative electrode of the load, and the third external connection end is used for being connected with a grounding resistor; the load driving chip includes:
the charging switch circuit is coupled between the power supply end and the first external connection end and used for providing a charging path for the external connection end to supply power to the battery;
the charging management circuit is connected with the charging switch circuit and is used for sending a charging control signal to the charging switch circuit so as to control the on-off of the charging path;
the load driving circuit is coupled between the second external connection end and the third external connection end and used for providing a discharging path of the battery to the load;
and the discharge management circuit is connected with the load driving circuit and is used for sending a discharge control signal to the load driving circuit so as to control the on-off of the discharge path.
2. The load driving chip according to claim 1, further comprising:
and the reference circuit is respectively connected with the charging management circuit and the discharging management circuit and is used for providing reference voltage and bias current.
3. The load driving chip according to claim 1, wherein the charging switch circuit comprises a first switch tube; the first switch tube is connected between the power supply end and the first external end, and the control end of the first switch tube is connected with the charging management circuit;
the charge management circuit is configured to: and judging charging conditions based on the power supply voltage of the external power supply and the battery voltage of the battery, controlling the first switching tube to be closed when all the charging conditions are met, and controlling the first switching tube to be switched off when any one of the charging conditions is not met.
4. The load driving chip according to claim 3, wherein the charging condition comprises:
the power supply voltage is greater than a preset power supply access voltage threshold, the power supply voltage is greater than the battery voltage, and the battery voltage is less than a preset overcharge protection voltage threshold.
5. The load driving chip according to claim 2, wherein the load driving circuit comprises a second switching tube and an operational amplifier; the second switch tube is connected between the second external connection end and the third external connection end;
the output end of the operational amplifier is connected with the control end of the second switch tube, the enabling end of the operational amplifier is connected with the discharge management circuit, the positive input end of the operational amplifier is connected with the reference voltage output end of the reference circuit, and the negative input end of the operational amplifier is connected with the third external end of the reference circuit, so that the on-off of the second switch tube is controlled, and the constant current drive is realized;
the discharge management circuit is configured to: and judging the discharging conditions based on the power supply voltage of the external power supply and the battery voltage of the battery, sending an enabling starting signal to the operational amplifier when each discharging condition is met, and sending an enabling closing signal to the operational amplifier when any discharging condition is not met.
6. The load driving chip according to claim 5, wherein the discharge condition comprises:
the power supply voltage is smaller than a preset power supply access voltage threshold, and the battery voltage is larger than a preset over-discharge protection voltage threshold.
7. The load driving chip according to claim 6, wherein the discharging management circuit comprises a discharging management module and a locking and unlocking module connected with each other; the output end of the locking and unlocking module is connected with the enabling end of the operational amplifier;
the discharge management module is used for: sending a first comparison result signal of a power supply voltage and the power supply access voltage threshold value and a second comparison result signal of a battery voltage and the over-discharge protection voltage threshold value to the locking and unlocking module;
the locking and unlocking module is used for: sending the enable starting signal to the operational amplifier when each discharging condition is met, and sending the enable closing signal to the operational amplifier when any discharging condition is not met; and the locking and unlocking module is also used for locking the current output state after outputting an enable close signal when the voltage of the battery is not greater than the over-discharge protection voltage threshold value until the locking is released after the power supply voltage is greater than the power supply access voltage threshold value or the battery is charged again.
8. The load driving chip according to any one of claims 2 and 5 to 7,
the charging management circuit is coupled with the power supply end through a power supply reverse connection prevention module so as to stop working when the external power supply is reversely connected.
9. The load driving chip according to claim 8,
the charging management circuit and the discharging management circuit are coupled with the first external connection end through a battery reverse connection prevention module, so that the charging management circuit and the discharging management circuit stop working when the external power supply is reversely connected.
10. The load driving chip according to claim 9, wherein the reference circuit further comprises:
and the reset module is used for generating and outputting a reset zero clearing signal with the duration as a preset value after the battery is powered on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122408804.3U CN216774311U (en) | 2021-09-30 | 2021-09-30 | Load driving chip |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122408804.3U CN216774311U (en) | 2021-09-30 | 2021-09-30 | Load driving chip |
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| CN216774311U true CN216774311U (en) | 2022-06-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117435390A (en) * | 2023-03-03 | 2024-01-23 | 无锡市稳先微电子有限公司 | Reset restarting circuit triggered by charging and electronic device |
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2021
- 2021-09-30 CN CN202122408804.3U patent/CN216774311U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117435390A (en) * | 2023-03-03 | 2024-01-23 | 无锡市稳先微电子有限公司 | Reset restarting circuit triggered by charging and electronic device |
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