CN111211547A - Terminal - Google Patents
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- CN111211547A CN111211547A CN202010071974.4A CN202010071974A CN111211547A CN 111211547 A CN111211547 A CN 111211547A CN 202010071974 A CN202010071974 A CN 202010071974A CN 111211547 A CN111211547 A CN 111211547A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
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Abstract
The invention discloses a terminal, which comprises a current limiting module, wherein the current limiting module can adjust a supply current to a current value which is not larger than the rated current value of a protection component, and the supply current output by the current limiting module and the discharge current of an energy storage module are jointly used as starting currents of a functional module, so that the pulse current in power-on can not damage the protection component, meanwhile, a larger current required by the functional module in power-on can be provided, and the normal starting of the functional module is ensured.
Description
Technical Field
The invention relates to the technical field of power supply control, in particular to a terminal.
Background
Fuses, also known as current fuses, are used primarily for overload protection. The fuse is correctly arranged in the circuit, and the fuse can be fused to cut off the current when the current is abnormally increased to a certain height and heat, so that the safe operation of the circuit is protected.
At present, a fuse fuses a fuse and a slow fuse at a different speed, when a functional module is powered on, a certain pulse current is always generated, and the slow fuse can bear a certain pulse current but is low in fusing speed; the fuse is quickly fused, the fusing speed is high, the borne current is small, and the fuse can be fused by the pulse current when the functional module is electrified.
Some safety requirement high equipment need quick fusing, if use quick fusing fuse, though can realize quick fusing when the functional module leads to the electric current to increase suddenly unusually, bigger pulse current also can burn out the fuse when the power-on, causes the unable normal use of functional module.
Disclosure of Invention
The embodiment of the invention provides a terminal, which is used for ensuring that a fuse cannot be burnt out by pulse current during power-on when a fast fuse is used, and a functional module can be normally used.
In a first aspect, an embodiment of the present invention provides a terminal, including: the device comprises a power supply module, a control module, a current limiting module, an energy storage module, a functional module and a protection component, wherein the protection component is respectively connected with the power supply module and the current limiting module;
the control module is used for sending a starting signal to the power supply module and sending a first enabling signal to the current limiting module after determining that power needs to be supplied to the functional module; after the energy storage module is charged, sending a second enabling signal to the functional module;
the power supply module is used for outputting power supply current to the current limiting module after receiving the starting signal;
the current limiting module is used for detecting the power supply current output by the power supply module after receiving the first enabling signal, adjusting the current value of the power supply current to a preset value if the current value of the power supply current output by the power supply module is determined to be larger than the preset value, and outputting the adjusted power supply current; the preset value is not more than the rated current value of the protection component and not less than the current value of the working current of the functional module;
the energy storage module is used for charging under the action of the adjusted power supply current output by the current limiting module and discharging after the control module sends a second enabling signal to the functional module;
the functional module is used for starting after receiving the second enabling signal; the starting current of the functional module is the supply current output by the current limiting module and the discharging current of the energy storage module, and the working current of the functional module is the supply current output by the current limiting module.
Optionally, the control module is specifically configured to:
and if the time length after the first enabling signal is sent to the current limiting module reaches a first preset time length, determining that the charging of the energy storage module is completed.
Optionally, the current limiting module is further configured to:
after the current value of the power supply current output by the power supply module is determined to be larger than a preset value, an overcurrent signal is sent to the control module;
after receiving the overcurrent signal, if the control module determines that the functional module is started, the control module informs the current limiting module to disconnect the electrical connection between the current limiting module and the power supply module; and/or informing the power supply module to stop outputting the power supply current to the current limiting module.
Optionally, the control module is specifically configured to:
and if the time interval between the time of receiving the overcurrent signal and the time of sending the first enabling signal to the current limiting module is determined to be greater than a second preset time, determining that the functional module is started.
Optionally, the current limiting module includes a current limiting chip, a capacitor connected to an input port of the current limiting chip, a first variable resistor connected to an enable port of the current limiting chip, and a second variable resistor connected to a current setting port and a ground port of the current limiting chip; the current value of the adjusted power supply current output by the current limiting module is determined according to the resistance value of the second variable resistor;
the other end of the capacitor is grounded;
the other end of the first variable resistor is grounded;
one end of the second variable resistor connected with the ground port is grounded;
one end of the capacitor connected with the input port of the current-limiting chip is connected with one end of the protection assembly, and the other end of the protection assembly is connected with the power supply module;
the overcurrent error reporting port of the current limiting chip is connected with the control module;
one end of the first variable resistor, which is connected with the enabling port of the current limiting chip, is connected with the control module;
and the output port of the current limiting chip is connected with the functional module.
Optionally, the energy storage module is an energy storage capacitor;
one end of the energy storage capacitor is connected with the output port of the current limiting chip, and the other end of the energy storage capacitor is grounded;
and one end of the energy storage capacitor connected with the output port of the current limiting chip is connected with the functional module.
Optionally, the energy storage module is a capacitor array formed by connecting at least two energy storage capacitors in parallel;
the input end of the capacitor array is connected with the output port of the current-limiting chip, and the output end of the capacitor array is grounded; and one end of the capacitor array, which is connected with the output port of the current-limiting chip, is connected with the functional module.
Optionally, the control module is specifically configured to: after determining that power needs to be supplied to the functional module, sending a first enabling signal to the current limiting chip through the enabling port; after receiving the overcurrent signal, if the functional module is determined to be started completely, informing the current limiting module to disconnect the electrical connection between the current limiting module and the power supply module through the enabling port;
the current limiting module is specifically configured to: and after the current value of the power supply current output by the power supply module is determined to be larger than a preset value, an overcurrent signal is sent to the control module through the overcurrent fault reporting port.
Optionally, the protection component is a fast blow fuse.
Optionally, the functional module is a liquid crystal display backlight driving module.
The invention has the following beneficial effects:
in the power supply control circuit provided by the embodiment of the invention, the current limiting module can detect the power supply current output by the power supply module after receiving the first enabling signal, and adjust the current value of the power supply current to the preset value when determining that the current value of the power supply current output by the power supply module is greater than the preset value, and output the adjusted power supply current.
In addition, the power supply control circuit provided by the invention is additionally provided with the energy storage module, the energy storage module is charged under the action of the adjusted power supply current output by the current limiting module, and when the functional module is started after receiving a second enabling signal sent by the control module, the energy storage module starts to discharge, and the energy storage module and the smaller power supply current output by the current limiting module are used as the starting current of the functional module together, so that the larger starting current required by starting can be provided for the functional module while the protection component is not damaged in the power-on process, and the normal starting of the functional module is ensured.
Drawings
Fig. 1 is a schematic diagram of a terminal structure according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a current limiting module according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an energy storage module according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another energy storage module according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a functional module according to an embodiment of the present invention.
Detailed Description
A detailed description of a terminal according to an embodiment of the present invention will be provided below with reference to the accompanying drawings.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. The embodiments described in the following exemplary embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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 invention.
Fuses, also known as current fuses, are used primarily for overload protection. The fuse is correctly arranged in the circuit, and the fuse can be fused to cut off the current when the current is abnormally increased to a certain height and heat, so that the safe operation of the circuit is protected.
The fuse fuses at a low speed and fuses at a low speed, and when the fuse at the high speed is used, the embodiment of the present invention provides a terminal, as shown in fig. 1, where the terminal includes: the device comprises a control module 10, a power supply module 11, a current limiting module 12, an energy storage module 13, a functional module 14 and a protection component 15 which is respectively connected with the power supply module 10 and the current limiting module 12;
the protection component 15 is a fast fusing fuse, and can realize fast fusing and protect a circuit when determining that the supply current output by the power supply module is abnormally increased and exceeds the rated current value of the fuse.
After determining that power needs to be supplied to the functional module 14, the control module 10 sends a start signal to the power supply module 11 and sends a first enable signal to the current limiting module 12;
in the embodiment of the present invention, after the control module 10 determines that the terminal is turned on or the user uses the function corresponding to the function module 14, it determines that power needs to be supplied to the function module 14;
for example, when the control module 10 determines that the user uses the "wlan" function, it determines that power needs to be supplied to the functional module corresponding to the "wlan" function.
After receiving the start signal sent by the control module 10, the power supply module 11 outputs the supply current to the current limiting module 12;
after receiving the first enable signal sent by the control module 10, the current limiting module 12 detects the supply current output by the power supply module 11, and if it is determined that the supply current output by the power supply module 11 is greater than a preset value, adjusts the current value of the supply current to the preset value, and outputs the adjusted supply current;
the preset value is not greater than the rated current value of the protection component 15 and not less than the current value of the working current of the functional module 14.
For example, if the supply current output by the power supply module 11 is 0.35A and the preset value is 0.3A, the current limiting module 12 detects the supply current value output by the power supply module 11, determines that the supply current value output by the power supply module 11 is 0.35A and greater than the preset value of 0.3A, adjusts the current value of the supply current to 0.3A, and outputs the adjusted supply current.
If the current limiting module 12 determines that the value of the power supply current output by the power supply module 11 is not greater than the preset value, the power supply current is output;
the energy storage module 13 is charged under the action of the adjusted power supply current output by the current limiting module 12;
after determining that the energy storage module 13 is completely charged, the control module 10 sends a second enable signal to the function module 14;
specifically, the control module 10 determines that the energy storage module 13 is charged according to the following manner:
if the control module 10 determines that the time length after the first enable signal is sent to the current limiting module 12 reaches the first preset time length, it is determined that the charging of the energy storage module 13 is completed.
For example, assuming that the first preset time period is 0.8S, when the control module 10 determines that the time period after the first enable signal is sent to the current limiting module 12 reaches 0.8S, it determines that the charging of the energy storage module is completed.
The functional module 14 starts after receiving the second enable signal, and the energy storage module 13 starts discharging; the starting current of the functional module 14 is the supply current output by the current limiting module 12 and the discharging current of the energy storage module 13.
In the embodiment of the invention, the current limiting module 12 can adjust the power supply current to a current value which is not larger than the rated current value of the protection component 15, so that when the protection component is a fast fusing fuse, the fuse cannot be burnt out by the pulse current during power-on, and the functional module can be ensured to be normally used.
In addition, the supply current output by the current limiting module 12 and the discharge current of the energy storage module 13 are used as the starting current of the functional module 14, so that the fast fusing fuse is not damaged, meanwhile, the large starting current required by electrifying can be provided for the functional module, and the normal starting of the functional module is ensured.
In the embodiment of the invention, after the current limiting module 12 determines that the current value of the power supply current output by the power supply module 11 is greater than the preset value, an overcurrent signal is also sent to the control module 10;
after receiving the overcurrent signal sent by the current limiting module 12, the control module 10 determines whether the function module 14 is started.
Specifically, the control module 10 determines whether a time interval between the time when the overcurrent signal is received and the time when the first enable signal is sent to the current limiting module 12 is greater than a second preset time length; if yes, the function module 14 is determined to be started completely.
For example, assuming that the preset second duration is T0, the time interval between the time when the control module 10 receives the over-current signal and the time when the control module 10 sends the first enable signal to the current limit module 12 is T, and the control module 10 determines that T0 is greater than T, it is determined that the activation of the function module 14 is completed.
After the control module 10 determines that the function module 14 is started, the control module notifies the current limiting module 12 to close, and the electrical connection between the current limiting module 12 and the power supply module 11 is disconnected; and/or, notify the power supply module 11 to stop outputting the supply current to the current limiting module 12.
It should be noted that, in the embodiment of the present invention, the second preset time period and the first preset time period are preset by a person skilled in the art, and the first preset time period is less than the second preset time period.
If the control module 10 receives an overcurrent signal sent by the current limiting module 12 and determines that the function module 14 is started completely, it indicates that the function module 14 is abnormal at this time, and in the terminal provided in the embodiment of the present invention, the control module 10 may also notify the current limiting module 12 to be closed, and disconnect the electrical connection between the current limiting module 12 and the power supply module 11; and/or, the power supply module 11 is informed to stop outputting the power supply current to the current limiting module 12, so that the functional module 14 can be protected together with the protection component 15.
In the embodiment of the present invention, when the terminal may be a terminal with a rechargeable battery, such as a mobile phone, the control module 10 mentioned in the embodiment of the present invention may be a Central Processing Unit (CPU) in the mobile phone, that is, the CPU in the mobile phone is used to implement the function of the control module 10.
The following explains a specific structure of the terminal in the embodiment of the present invention:
referring to the specific structural diagram of the current limiting module shown in fig. 2, the protection component 15 is a fast fusing fuse F1;
the current limiting module 12 includes: the current limiting chip IC1, a capacitor C1, a first variable resistor R1 and a second variable resistor R2; one end of the capacitor C1 is connected with an IN port of the current-limiting chip IC1, and the other end of the capacitor C1 is grounded and used for stabilizing the voltage of the power supply battery; one end of the first variable resistor R1 is connected to the EN port of the current limiting chip IC1, and the other end is grounded, so that the current limiting chip IC1 is in a turned-off state when the control module 10 does not send the first enable signal to the current limiting chip IC 1; one end of the second variable resistor R2 is connected with the ILIM port of the current-limiting chip IC1, the other end of the second variable resistor R3578 is connected with the GND port of the current-limiting chip IC1, and one end of the second variable resistor R2 connected with the GND port is grounded; the current value of the adjusted supply current output by the current limiting module 12 is determined according to the resistance value of the second variable resistor R2.
Optionally, the current value of the adjusted supply current is determined according to the following formula:
wherein, ILIMThe current value, R, of the regulated supply current output by the current limiting moduleILIMIs the resistance value of the second variable resistor R2.
One end of the capacitor C1, which is connected with the EN port of the current-limiting chip IC1, is connected with one end of the fuse F1; the other end of the fuse F1 is connected with the power supply module 11; the FAULT port of the current limiting chip IC1 is connected with the control module 10; the EN port of the current limiting chip IC1 is connected with the control module 10, and is used for the control module 10 to send a first enabling signal to the current limiting chip IC 1; one end of the first variable resistor R1, which is connected with the EN port of the current-limiting chip IC1, is connected with the control module 10; the OUT port of the current limiting chip is connected to the functional module 14.
It should be noted that, in the embodiment of the present invention, the current limiting chip IC1 may be an electronic current limiting switch chip, and the current limiting chip IC1 is used to detect the output current of the power supply module 11, adjust the current value of the power supply current to a preset value when it is determined that the current value of the power supply current is greater than the preset value, and output the adjusted power supply current.
In the embodiment of the present invention, the energy storage module 13 may be an energy storage capacitor with a large capacitance value, or may be a capacitor array formed by connecting at least two energy storage capacitors in parallel.
If the energy storage module 13 is an energy storage capacitor with a large capacitance value, referring to the specific structural diagram of the energy storage module shown in fig. 3, the energy storage module includes an energy storage capacitor C2;
one end of the energy storage capacitor C2 is connected with the OUT port of the current-limiting chip IC1, and the other end of the energy storage capacitor C2 is grounded; one end of the energy storage capacitor C2, which is connected with the OUT port of the current limiting chip, is connected with the functional module 14;
in the embodiment of the present invention, the energy storage capacitor C2 may also play a role of voltage stabilization, so that the voltage signal output by the current limiting module 12 is more stable, which is beneficial to the normal operation of the functional module 14.
It should be noted that the capacitance value of the energy storage capacitor C2 is preset by those skilled in the art according to the current value of the power supply current output by the power supply module 11 when the functional module 14 is normally operating and the rated voltage value of the power supply module 11.
If the energy storage module 13 is a capacitor array formed by at least two energy storage capacitors connected in parallel, referring to the specific structural diagram of the energy storage module shown in fig. 4, the energy storage module 13 includes a capacitor array formed by an energy storage capacitor C11, an energy storage capacitor C12, and an energy storage capacitor C13;
the input ends of the energy storage capacitor C11, the energy storage capacitor C12 and the energy storage capacitor C13 in the capacitor array are connected with the OUT port of the current-limiting chip IC1, the output ends of the energy storage capacitor C11, the energy storage capacitor C12 and the energy storage capacitor C13 in the capacitor array are grounded, and the end, connected with the OUT port of the current-limiting chip IC1, of the energy storage capacitor C11, the energy storage capacitor C12 and the energy storage capacitor C13 in the capacitor array is connected with the functional module.
After the energy storage capacitors included in the capacitor array are charged, they provide the starting current for the functional module 14.
It should be noted that the capacitance value of the capacitor in the capacitor array is preset by those skilled in the art according to the current value of the power supply current output by the power supply module 11 when the functional module 14 is normally operating and the rated voltage value of the power supply module 11.
IN the embodiment of the present invention, the IN port may be referred to as an input port; the EN port may be referred to as an enable port; the ILIM port is referred to as the current set port; the GND port may be referred to as a ground port; the FAULT port may be referred to as an over-current error-reporting port; the OUT port may be referred to as an output port.
When the functional module 14 is a backlight driving module of a liquid crystal display of a mobile phone, as shown in fig. 5, the functional module includes: the control circuit comprises a control chip IC2, a capacitor C3, a capacitor C4, a capacitor C5, an inductor L1 and a zener diode D1;
one end of the energy storage capacitor C2, which is connected with the OUT port of the current-limiting chip IC1, is connected with the VIN port of the control chip IC 2; one end of the capacitor C3 is connected with the CTRL port of the control chip IC2 and the control module 10, and the other end of the capacitor C3 is grounded; one end of the capacitor C4 is connected with a COMP port of the control chip IC2, and the other end of the capacitor C4 is grounded; one end of the inductor L1 is connected with the VIN port of the control chip IC2, and the other end of the inductor L1 is connected with the SW port of the control chip IC 2; one end of the inductor L1 connected with the SW port of the control chip IC2 is connected with the anode of the voltage stabilizing diode D1, and the cathode of the voltage stabilizing diode is connected with one end of the capacitor C5; the other end of the capacitor C5 is grounded; the FB port of the control chip IC2 is connected with the LCD _ LED _ K port of the LED light bar of the backlight circuit; the GND port of the control chip IC2 is grounded; one end of the capacitor C5 connected with the cathode of the voltage stabilizing diode is connected with the LCE _ LED _ A1 port of the LED lamp bar of the backlight circuit.
It should be noted that the backlight driving module of the liquid crystal display of the mobile phone is only an example of the functional module according to the embodiment of the present invention, and the functional module according to the embodiment of the present invention may also be other functional modules that need to be powered, and is not limited herein.
In the embodiment of the present invention, the VIN port may be referred to as an input port; the CTRL port may be referred to as a control port; the COMP port may be referred to as a current compensation port; the SW port may be referred to as an output port; the FB port may be referred to as a feedback port; the GND port may be referred to as a ground port; the LCD _ LED _ a1 port may be referred to as the input port of the backlight circuit LED light bar; the LCD _ LED _ K port may be referred to as an output port of the backlight circuit LED light bar.
The following describes the operation process of the terminal according to the embodiment of the present invention with the terminal structure shown in fig. 5:
after the control module 10 determines that power needs to be supplied to the function module 14, it sends a start signal to the power supply module 11 and a first enable signal to the current limit chip IC 1.
Specifically, the control module 10 inputs a high level to the EN port of the current limit chip IC 1.
After the power supply module 11 receives the start signal, the power supply current is output to the IN port of the current-limiting chip IC 1; the current limiting chip IC1 is started after receiving the first enable signal, detects the supply current output by the power supply module 11, adjusts the current value of the supply current to a preset value if it is determined that the current value of the supply current output by the power supply module 11 is greater than the preset value, and outputs the adjusted supply current through the OUT port;
the energy storage capacitor C2 is charged under the action of the adjusted power supply current output by the current limiting chip IC 1; when the control module 10 determines that the time length after the first enable signal is sent to the current limit chip IC1 reaches a first preset time length, it determines that the charging of the energy storage capacitor C2 is completed, and sends a second enable signal to the control chip IC 2.
Specifically, after the control module 10 determines that the charging of the energy storage capacitor C2 is completed, a high level is input to the CTRL port of the control chip IC 2.
The function module 14 is started after receiving the second enable signal, and the energy storage capacitor C2 starts to discharge; the supply current output from the OUT port of the current-limiting chip and the discharge current of the energy-storing capacitor C2 are used as the starting current of the functional module 14, and are output to the VIN port of the control chip IC 2.
In the embodiment of the present invention, after the current-limiting chip IC1 determines that the current value of the supply current output by the power supply module 11 is greater than the preset value, an overcurrent signal is also sent to the control module 10 through the FAULT port.
Optionally, the current limit chip IC1 outputs a low level to the control module 10 through the FAULT port.
After receiving the overcurrent signal sent by the current-limiting chip IC1, if it is determined that the time interval between the time when the overcurrent signal is received and the time when the first enable signal is sent to the EN port of the current-limiting chip IC1 is greater than the second preset time, it is determined that the functional module 14 is started, and the current-limiting chip IC1 is notified to be turned off, at this time, the power supply module 11 cannot output the supply current to the IN port of the current-limiting chip IC1, and the OUT port of the current-limiting chip IC1 does not output the supply current; and/or, notify the power supply module 11 to stop outputting the supply current to the IN port of the current-limiting chip IC 1.
Alternatively, the control module 10 notifies the current limit chip IC1 to turn off by inputting a low level to the EN port of the current limit chip IC 1.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (10)
1. A terminal, comprising: the device comprises a power supply module, a control module, a current limiting module, an energy storage module, a functional module and a protection component, wherein the protection component is respectively connected with the power supply module and the current limiting module;
the control module is used for sending a starting signal to the power supply module and sending a first enabling signal to the current limiting module after determining that power needs to be supplied to the functional module; after the energy storage module is charged, sending a second enabling signal to the functional module;
the power supply module is used for outputting power supply current to the current limiting module after receiving the starting signal;
the current limiting module is used for detecting the power supply current output by the power supply module after receiving the first enabling signal, adjusting the current value of the power supply current to a preset value if the current value of the power supply current output by the power supply module is determined to be larger than the preset value, and outputting the adjusted power supply current; the preset value is not more than the rated current value of the protection component and not less than the current value of the working current of the functional module;
the energy storage module is used for charging under the action of the adjusted power supply current output by the current limiting module and discharging after the control module sends a second enabling signal to the functional module;
the functional module is used for starting after receiving the second enabling signal; the starting current of the functional module is the supply current output by the current limiting module and the discharging current of the energy storage module, and the working current of the functional module is the supply current output by the current limiting module.
2. The terminal of claim 1, wherein the control module is specifically configured to:
and if the time length after the first enabling signal is sent to the current limiting module reaches a first preset time length, determining that the charging of the energy storage module is completed.
3. The terminal of claim 1, wherein the current limiting module is further to:
after the current value of the power supply current output by the power supply module is determined to be larger than a preset value, an overcurrent signal is sent to the control module;
after receiving the overcurrent signal, if the control module determines that the functional module is started, the control module informs the current limiting module to disconnect the electrical connection between the current limiting module and the power supply module, and/or informs the power supply module to stop outputting power supply current to the current limiting module.
4. The terminal of claim 3, wherein the control module is specifically configured to:
and if the time interval between the time of receiving the overcurrent signal and the time of sending the first enabling signal to the current limiting module is determined to be greater than a second preset time, determining that the functional module is started.
5. The terminal of claim 3, wherein the current limiting module comprises a current limiting chip, a capacitor connected to an input port of the current limiting chip, a first variable resistor connected to an enable port of the current limiting chip, and a second variable resistor connected to a current setting port and a ground port of the current limiting chip; the current value of the adjusted power supply current output by the current limiting module is determined according to the resistance value of the second variable resistor;
the other end of the capacitor is grounded;
the other end of the first variable resistor is grounded;
one end of the second variable resistor connected with the ground port is grounded;
one end of the capacitor connected with the input port of the current-limiting chip is connected with one end of the protection assembly, and the other end of the protection assembly is connected with the power supply module;
the overcurrent error reporting port of the current limiting chip is connected with the control module;
one end of the first variable resistor, which is connected with the enabling port of the current limiting chip, is connected with the control module;
and the output port of the current limiting chip is connected with the functional module.
6. The terminal of claim 5, wherein the energy storage module is an energy storage capacitor;
one end of the energy storage capacitor is connected with the output port of the current limiting chip, and the other end of the energy storage capacitor is grounded; and one end of the energy storage capacitor connected with the output port of the current limiting chip is connected with the functional module.
7. The terminal of claim 5, wherein the energy storage module is a capacitor array formed by at least two energy storage capacitors connected in parallel;
the input end of the capacitor array is connected with the output port of the current-limiting chip, and the output end of the capacitor array is grounded; and one end of the capacitor array, which is connected with the output port of the current-limiting chip, is connected with the functional module.
8. The terminal of claim 5, wherein the control module is specifically configured to: after determining that power needs to be supplied to the functional module, sending a first enabling signal to the current limiting chip through the enabling port; after receiving the overcurrent signal, if the functional module is determined to be started completely, informing the current limiting module to disconnect the electrical connection between the current limiting module and the power supply module through the enabling port;
the current limiting module is specifically configured to: and after the current value of the power supply current output by the power supply module is determined to be larger than a preset value, an overcurrent signal is sent to the control module through the overcurrent fault reporting port.
9. A terminal as claimed in any one of claims 1 to 8, wherein the protection component is a fast blow fuse.
10. The terminal as claimed in any one of claims 1 to 8, wherein the functional module is a liquid crystal display backlight driving module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010071974.4A CN111211547B (en) | 2020-01-21 | 2020-01-21 | Terminal |
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| GB2300982A (en) * | 1995-05-19 | 1996-11-20 | Eni Inc | Soft-start arrangement for high-power module with large capacitor storage bank |
| CN101611361A (en) * | 2006-10-21 | 2009-12-23 | 先进模拟科技公司 | The power control of band soft start |
| CN101632210A (en) * | 2006-10-13 | 2010-01-20 | 先进模拟科技公司 | Utilize the electric current restriction control of current limit detector |
| CN101640412A (en) * | 2009-09-02 | 2010-02-03 | 中兴通讯股份有限公司 | Soft-starting circuit of power supply |
| CN103633633A (en) * | 2013-12-18 | 2014-03-12 | 四川卫士通信息安全平台技术有限公司 | Restraining method of startup input inrush current of power supply |
| US20160359311A1 (en) * | 2014-02-18 | 2016-12-08 | Ge Aviation Systems Limited | Method for limiting current in a circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| GB2300982A (en) * | 1995-05-19 | 1996-11-20 | Eni Inc | Soft-start arrangement for high-power module with large capacitor storage bank |
| CN101632210A (en) * | 2006-10-13 | 2010-01-20 | 先进模拟科技公司 | Utilize the electric current restriction control of current limit detector |
| CN101611361A (en) * | 2006-10-21 | 2009-12-23 | 先进模拟科技公司 | The power control of band soft start |
| CN101640412A (en) * | 2009-09-02 | 2010-02-03 | 中兴通讯股份有限公司 | Soft-starting circuit of power supply |
| CN103633633A (en) * | 2013-12-18 | 2014-03-12 | 四川卫士通信息安全平台技术有限公司 | Restraining method of startup input inrush current of power supply |
| US20160359311A1 (en) * | 2014-02-18 | 2016-12-08 | Ge Aviation Systems Limited | Method for limiting current in a circuit |
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Address after: 266071 Shandong city of Qingdao province Jiangxi City Road No. 11 Patentee after: Qingdao Hisense Mobile Communication Technology Co.,Ltd. Address before: 266071 Shandong city of Qingdao province Jiangxi City Road No. 11 Patentee before: HISENSE MOBILE COMMUNICATIONS TECHNOLOGY Co.,Ltd. |
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