CN109980722B - Power supply control device - Google Patents
Power supply control device Download PDFInfo
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- CN109980722B CN109980722B CN201910227729.5A CN201910227729A CN109980722B CN 109980722 B CN109980722 B CN 109980722B CN 201910227729 A CN201910227729 A CN 201910227729A CN 109980722 B CN109980722 B CN 109980722B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M10/4257—Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
The embodiment of the invention discloses a power supply control device, which comprises: the device comprises an input detection circuit, a control circuit, a switching circuit and a discharge circuit; the input detection circuit has an input interface; the input detection circuit generates a corresponding detection signal after an input interface of the input detection circuit detects effective input, the detection signal reaches the control circuit through a first input end of the control circuit, and the control circuit generates a control signal according to the detection signal and sends the control signal to the switch circuit and/or the discharge circuit respectively to enable the switch circuit to be switched on or enable the switch circuit to be switched off and enable the discharge circuit to be switched on and then switched off. The control circuit is used for controlling the on-off of the switch circuit, so that the stability is higher; when the control circuit controls the switch circuit to be switched off, namely the load equipment needs to be reset, the newly added circuit is switched on to realize the complete discharge of the load equipment, and the effective reset of the load equipment is realized.
Description
Technical Field
The invention relates to the technical field of electronics, in particular to a power supply control device.
Background
Mobile communication devices, from the factory to the point of sale, may need to undergo a long period of transportation. Few weeks, generally several months, and many 1 year. After shipment to the destination, the overall time may be relatively long until the moment the product is sold. During such a long time, the device is powered off, and is actually in an ultra-low power mode and not completely disconnected from the power source. Semiconductor technology, there is power consumption when there is power supply; if certain measures are not taken to reduce the power consumption, if the equipment is completely without electricity when the box is sold and opened, the equipment cannot be immediately experienced by a user, the battery is easily over-discharged due to low-power-consumption discharge, the service life of the battery is greatly influenced, and even the battery cannot be recharged.
Currently, the way to solve the above technical problem is to disconnect the connection between the battery and the load device when the power is turned off. This functionality is integrated into an integrated circuit chip, for example: internal to a charger (charger) Integrated Circuit (IC).
By adopting the scheme, a certain error probability exists in the current application result, so that the power supply is switched on, and in addition, the reset function of the load equipment is poor.
Disclosure of Invention
The embodiment of the invention provides a power supply control device, which is used for improving the stability of power supply control and the effectiveness of resetting load equipment.
An embodiment of the present invention provides a power supply control device, including:
the device comprises an input detection circuit, a control circuit, a switching circuit and a discharge circuit;
the input detection circuit is provided with an input interface, and a first output end of the input detection circuit is connected with a first input end of the control circuit;
the first output end of the control circuit is connected with the input end of the discharge circuit, and the second output end of the control circuit is connected with the switch circuit;
one end of the discharge circuit is connected with the load equipment, and the other end of the discharge circuit is grounded; in the conducting state of the discharge circuit, the charge on the load equipment is discharged through the discharge circuit;
one end of the switch circuit is connected with the load equipment, and the other end of the switch circuit is connected with the battery; when the switch circuit is in a conducting state, the battery provides electric energy for the load equipment through the switch circuit;
the input detection circuit generates a corresponding detection signal after an input interface of the input detection circuit detects effective input, the detection signal reaches the control circuit through a first input end of the control circuit, and the control circuit generates a control signal according to the detection signal and sends the control signal to the switch circuit and/or the discharge circuit respectively to enable the switch circuit to be switched on or enable the switch circuit to be switched off and enable the discharge circuit to be switched on and then switched off.
In an optional implementation manner, the input interface of the input detection circuit includes: a power adapter detection interface or a key detection interface; the input detection circuit generates a corresponding detection signal after the input interface thereof detects a valid input, and the detection signal comprises:
when the switch circuit is in an off state, the input detection circuit detects that the power adapter detection interface has voltage input or the input detection circuit detects that a key instruction for controlling to enter a conducting mode is detected at the key detection interface, and then a first detection signal is generated;
the control circuit generates control signals according to the detection signals and sends the control signals to the switch circuit and/or the discharge circuit respectively, and the switching circuit is conducted by the control circuit, the control circuit comprises:
the control circuit generates a first control signal according to the first detection signal and sends the first control signal to the switch circuit, so that the switch circuit is conducted.
In an alternative implementation, the input detection circuit includes:
a charging integrated circuit and a power control integrated circuit;
the charging integrated circuit is provided with a power adapter interface and a voltage output interface; the power control integrated circuit is provided with a power adapter detection interface, or the power control integrated circuit is provided with a power adapter detection interface and a key detection interface;
the voltage output interface of the charging integrated circuit is connected with the power adapter detection interface of the power control integrated circuit;
after the power adapter interface is connected with a power adapter, the voltage output interface of the charging integrated circuit outputs voltage to the power adapter detection interface of the power control integrated circuit, and the power control integrated circuit determines that the adapter is accessed after the power adapter detection interface monitors the voltage.
In an optional implementation, the monitoring, by the power control integrated circuit, the voltage at the power adapter detection interface includes:
the power control integrated circuit comprises a comparator and a first resistor;
the reverse input end of the comparator is connected with a reference voltage, the same-direction input end of the comparator is connected with one end of the first resistor, and the other end of the first resistor is connected with a power adapter detection interface of the power control integrated circuit;
when the power adapter detection interface of the power control integrated circuit has voltage, the voltage of the power adapter detection interface of the power control integrated circuit reaches the homodromous input end of the comparator through the first resistor, so that the output signal of the comparator changes.
In an optional implementation, the power control integrated circuit further includes:
and one end of the second resistor is connected between the first resistor and a power adapter detection interface of the power control integrated circuit, and the other end of the second resistor is grounded.
In an optional implementation, the power control integrated circuit further includes:
and one end of the ESD protection device is connected between the first resistor and the equidirectional input end of the comparator, and the other end of the ESD protection device is grounded.
In an optional implementation, the power control integrated circuit further includes:
a capacitor; one end of the capacitor is connected between the first resistor and a power adapter detection interface of the power control integrated circuit, and the other end of the capacitor is grounded.
In an optional implementation manner, the input interface of the input detection circuit includes: a key detection interface;
the input detection circuit generates a corresponding detection signal after the input interface thereof detects a valid input, and the method comprises the following steps:
the input detection circuit receives a key instruction for controlling to enter a turn-off mode through the key detection interface, and then generates a second detection signal;
the control circuit generates control signals according to the detection signals and sends the control signals to the switch circuit and/or the discharge circuit respectively, and the steps of enabling the switch circuit to be disconnected and enabling the discharge circuit to be disconnected after being switched on comprise:
and the control circuit generates a second control signal according to the second detection signal and sends the second control signal to the switching circuit and the discharge circuit respectively, so that the switching circuit is disconnected and the discharge circuit is disconnected after being switched on.
In an alternative implementation, the detection signal comprises a pulse signal with a high and low duty cycle;
in an alternative implementation, the control signal is sent out with a delay after the detection signal is sent.
In an alternative implementation, the third output of the control circuit is connected to the load device;
delaying the sending of a third control signal to the load device after the control circuit sends the second control signal, for controlling the load device to stop working; the second control signal has a buffering time from an initial level to a highest level or to a lowest level.
In an alternative implementation, the second control signal is logically opposite to the third control signal level.
In an optional implementation manner, the power control apparatus further includes: a timing circuit;
the second output end of the input detection circuit is connected with the input end of the timing circuit; the output end of the timing circuit is connected with the second input end of the control circuit;
the detection signal enters the timing circuit through a second output end of the input detection circuit, and the timing circuit generates a signal for informing the control circuit that the delay time is up after the required delay time is over.
According to the technical scheme, the embodiment of the invention has the following advantages: the control circuit is used for controlling the on-off of the switch circuit, so that the stability is higher; when the control circuit controls the switch circuit to be switched off, namely the load equipment needs to be reset, the newly added circuit is switched on to realize the complete discharge of the load equipment, and the effective reset of the load equipment is realized.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a schematic structural diagram of a power control apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an input detection circuit according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a power adapter detection circuit according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a power control integrated circuit according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a power control apparatus according to an embodiment of the present invention;
FIG. 6A is a schematic diagram of a power control device according to an embodiment of the present invention;
FIG. 6B is a schematic structural diagram of a power control apparatus according to an embodiment of the invention;
FIG. 7 is a schematic diagram of a discharge circuit according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of level signals according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of level signals according to an embodiment of the present invention;
FIG. 10A is a schematic diagram of level signals according to an embodiment of the present invention;
FIG. 10B is a schematic diagram of level signals according to one embodiment of the present invention;
fig. 11 is a schematic diagram of a mode conversion process according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, 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.
An embodiment of the present invention provides a power supply control apparatus, as shown in fig. 1, including:
an input detection circuit, a control circuit and a discharge circuit; the switch circuit in the dashed line frame can be positioned in the power supply control device or can be self-contained in the mobile communication equipment;
the input detection circuit is provided with an input interface, and a first output end of the input detection circuit is connected with a first input end of the control circuit;
the first output end of the control circuit is connected with the input end of the discharge circuit, and the second output end of the control circuit is connected with the switch circuit;
one end of the discharge circuit is connected with the load equipment, and the other end of the discharge circuit is grounded; in the conducting state of the discharge circuit, the charge on the load equipment is discharged through the discharge circuit;
one end of the switch circuit is connected with the load equipment, and the other end of the switch circuit is connected with the battery; when the switch circuit is in a conducting state, the battery provides electric energy for the load equipment through the switch circuit;
the input detection circuit generates a corresponding detection signal after an input interface of the input detection circuit detects effective input, the detection signal reaches the control circuit through a first input end of the control circuit, and the control circuit generates a control signal according to the detection signal and sends the control signal to the switch circuit and/or the discharge circuit respectively to enable the switch circuit to be switched on or enable the switch circuit to be switched off and enable the discharge circuit to be switched on and then switched off.
In the embodiment, the control circuit is used for controlling the on and off of the switch circuit, so that the stability is higher; when the control circuit controls the switch circuit to be switched off, namely the load equipment needs to be reset, the newly added circuit is switched on to realize the complete discharge of the load equipment, and the effective reset of the load equipment is realized.
Based on a more detailed implementation example, as shown in fig. 2, the embodiment of the present invention further provides a specific interface of the input detection circuit, and a detection implementation scheme thereof: the input interface of the input detection circuit comprises: a power adapter detection interface or a key detection interface; the input detection circuit generates a corresponding detection signal after the input interface thereof detects a valid input, and the detection signal comprises:
when the switch circuit is in an off state, the input detection circuit detects that the power adapter detection interface has voltage input or the input detection circuit detects that a key instruction for controlling to enter a conducting mode is detected at the key detection interface, and then a first detection signal is generated;
the control circuit generates control signals according to the detection signals and sends the control signals to the switch circuit and/or the discharge circuit respectively, and the switching circuit is switched on, and the control circuit comprises:
the control circuit generates a first control signal according to the first detection signal and sends the first control signal to the switch circuit, so that the switch circuit is conducted.
The embodiment of the present invention further provides a more detailed implementation scheme of how the input detection circuit specifically implements power detection, as shown in fig. 3, as follows: the input detection circuit includes:
a charging integrated circuit IC and a power control integrated circuit IC;
the charging integrated circuit is provided with a power adapter interface and a voltage output interface; the power supply control integrated circuit is provided with a power supply adapter detection interface, or the power supply control integrated circuit is provided with a power supply adapter detection interface and a key detection interface;
the voltage output interface of the charging integrated circuit is connected with the power adapter detection interface of the power control integrated circuit;
after the power adapter interface is connected with a power adapter, the voltage output interface output voltage of the charging integrated circuit reaches the power adapter detection interface of the power control integrated circuit, and the power control integrated circuit determines that the adapter is connected after the power adapter detection interface monitors the voltage.
The following embodiments will be described in further detail with reference to fig. 3. In fig. 3, the power adapter interface is an interface into which a power adapter is inserted, and the power adapter detection interface is a functional interface for detecting the insertion of the power adapter, and corresponds to the Voltage Output (VOUT) interface of the power control IC shown in fig. 3, which is a voltage output interface at the time of power supply.
As shown in fig. 4, an embodiment of the present invention further provides a specific implementation circuit structure for detecting voltage input inside a power control IC, where a right square area in fig. 4 is an interface where a power adapter detection interface is connected to a charging IC: the power control integrated circuit monitoring the voltage at the power adapter detection interface comprises:
the power supply control integrated circuit comprises a comparator and a first resistor R1;
the reverse input end of the comparator is connected with a reference voltage Vref, the same-direction input end of the comparator is connected with one end of the first resistor R1, and the other end of the first resistor R1 is connected with a power adapter detection interface of the power control integrated circuit;
when the power adapter detection interface of the power control integrated circuit has voltage, the voltage of the power adapter detection interface of the power control integrated circuit reaches the homodromous input end of the comparator through the first resistor R1, so that the output signal of the comparator changes.
The following embodiments will be described in further detail with reference to fig. 4.
Further, the embodiment of the present invention further provides a technical solution for protecting a power control IC, which includes: the power control integrated circuit further comprises:
and one end of the second resistor R2 is connected between the first resistor R1 and a power adapter detection interface of the power control integrated circuit, and the other end of the second resistor R2 is grounded.
Further, the embodiment of the present invention further provides a technical scheme of electrostatic protection, which is specifically as follows: the power control integrated circuit further comprises:
an Electro-Static discharge (ESD) protection device D, one end of which is connected between the first resistor R1 and the same-direction input end of the comparator, and the other end of which is grounded. The ESD protection device may typically be a diode.
Further, the embodiment of the present invention further provides a technical solution for filtering the spurious signals to reduce false detection, which is specifically as follows: the power control integrated circuit further comprises:
a capacitor C; one end of the capacitor C is connected between the first resistor R1 and a power adapter detection interface of the power control integrated circuit, and the other end of the capacitor C is grounded.
In the above embodiment, the main function of the input detection circuit is to be used as an implementation scheme for turning on the switch circuit, and the embodiment of the present invention further provides an implementation scheme for resetting and turning off the switch circuit through key detection, as follows: the input interface of the input detection circuit comprises: a key detection interface;
the input detection circuit generates a corresponding detection signal after the input interface thereof detects a valid input, and the detection signal comprises:
the input detection circuit receives a key instruction for controlling to enter a turn-off mode through the key detection interface, and then generates a second detection signal;
the control circuit generates control signals according to the detection signals and sends the control signals to the switch circuit and/or the discharge circuit respectively, and the control circuit is used for disconnecting the switch circuit and disconnecting the discharge circuit after being switched on and comprises the following steps:
and the control circuit generates a second control signal according to the second detection signal and sends the second control signal to the switching circuit and the discharge circuit respectively, so that the switching circuit is disconnected and the discharge circuit is disconnected after being switched on.
Preferably, in the embodiment of the present invention, in order to improve the reliability of the control signal, the following solutions are provided in the embodiment of the present invention: the detection signal comprises a pulse signal with high and low duty ratio, and the control signal is emitted in a delayed mode after the detection signal is emitted.
Preferably, in the embodiment of the present invention, in order to improve the reliability of the control signal, the following solutions are provided in the embodiment of the present invention:
a third output of the control circuit is connected to the load device;
delaying the sending of a third control signal to the load device after the control circuit sends the second control signal, for controlling the load device to stop working;
the second control signal has a buffering time from an initial level to a highest level or to a lowest level.
Preferably, in the embodiment of the present invention, in order to improve the reliability of the control signal, the following solutions are provided in the embodiment of the present invention: the second control signal is logically opposite to the third control signal level.
Preferably, in the embodiment of the present invention, in order to improve the reliability of the control signal, the embodiment of the present invention provides the following solution, as shown in fig. 5: the power supply control device further includes: a timing circuit;
the second output end of the input detection circuit is connected with the input end of the timing circuit; the output end of the timing circuit is connected with the second input end of the control circuit;
the detection signal enters the timing circuit through a second output end of the input detection circuit, and the timing circuit generates a signal for informing the control circuit that the delay time is up after the required delay time is over.
As a more specific example, a power control apparatus according to an embodiment of the present invention, as shown in fig. 6A and fig. 6B, includes the following components: timing circuit, input detection circuit, discharge circuit, control circuit. In fig. 6A and 6B, the switch circuit may belong to the control device according to the embodiment of the present invention, or may belong to the outside of the control device; a load device, a load device of a power supply.
In the present embodiment, the specific functions of the functional circuits are as follows:
a timing circuit: the timing function in the power supply control device is completed, and mainly key pressing time detection, reset time control and the like are performed. The timer may be selected as desired.
An input detection circuit: the method is mainly used for detecting the power adapter access and the key input (input signal) of a user. When the equipment is in a turn-off mode, the input detection circuit detects that the power adapter is connected after the power adapter is connected, and a detection signal needs to be sent to the control circuit to enable the equipment to exit the turn-off mode and enter a conduction mode; and key input detection, which mainly responds to the change of the output state after the key is pressed and the duration is reached. The connection between the power source and the load device is broken in the off mode (the switching circuit is off), and correspondingly the connection between the power source and the load device is on in the on mode (the switching circuit is on). The connection between the load device and other circuits may include, among other things: the power supply after passing through the switch circuit is output to the load equipment, and in addition, the load equipment can be connected to one end of the discharge input of the discharge circuit if the load equipment has a reset requirement.
A discharge circuit: a discharge circuit of the load device is provided to completely power down the load device during power down to achieve a full reset function, the discharge circuit being controlled by a control signal 1 of the control circuit.
The control circuit: controlling output signals (including control signals 1-3) according to detection signals input by the input detection circuit; the control signal 2 is used for controlling the switching circuit to switch on and off the power supply. The control signal 1 is used for controlling the discharge circuit to be switched on and then switched off; the control signal 3 is used as a reset signal of the load equipment, so that the load equipment is reset or closed when the power supply is disconnected, and the phenomenon of abnormal work of the load equipment at the moment of power failure is improved.
The main functional circuits appearing in the embodiments of the present invention are explained in detail below:
1. a discharge circuit:
most of the existing mobile communication devices are provided with built-in batteries, and once an internal network domain crashes, the devices need to be restarted through a reset function. The reset function only briefly disconnects the power supply of the battery and currently does not bleed off the charge on the capacitor of the load device. Because the reset time is extremely short, the capacitor in the load device can not discharge to a voltage point enough for resetting the load by self-discharge in the reset time, thereby causing the failure of the whole reset function.
An equivalent schematic of the discharge circuit is shown in fig. 7.
R is a current limiting resistor for limiting current; s is a switch, and a transistor, a field effect transistor, or the like may be used instead. Wherein the internal control is connected to the control circuit to receive the control signal 1; the discharge interface is a discharge input, and is connected to a device needing discharge, such as: a load device.
2. Long-term power off function (off mode):
after the input detection circuit receives an effective command and indicates to turn off the power supply, the control circuit sends a control signal 2 to the switching circuit to turn off the switching circuit, so that the working mode is entered, the battery is completely disconnected from the load equipment, and the off mode is kept.
In the off mode, the power consumption of the mobile communication device is very low, and the current will be less than 1uA, which is basically negligible. And when a valid trigger command is received again, the system can exit the off mode and enter the on mode. The shutdown mode is very suitable for occasions needing long-time storage and transportation of equipment, and can effectively save the electric energy of the battery in the storage and transportation process and achieve the purpose of protecting the battery.
3. Reliable enter and exit commands:
since entering the off mode cuts off the power supply, the load device and the entire system of mobile communication devices are no longer operational. In order to avoid influencing the normal use and experience of a user, the starting requirement of the turn-off mode is very reliable, and false triggering cannot occur; and the power-off mode can not be triggered by mistake to exit after being started, because the original energy-saving function is lost after exiting.
The solution provided by the embodiment of the present invention may be that after receiving an instruction for entering the shutdown mode input by a user, a certain buffer time is left before the power is turned off, for example, the device notifies the user that "shutdown will be performed within xxx time", and the like.
A detection signal entering an off mode and a control signal, as shown in fig. 8, the detection signal having pulses with high and low duty cycles; in fig. 8, T1=2ms, T2=100ms, ts =15s; it is understood that the number of pulses and the duration of each pulse are not limited to the range shown in fig. 8, and the control signal may be a logic low.
The detection signal and the control signal for exiting the shutdown mode are illustrated as shown in fig. 9, and the active level of the detection signal may be a logic "high", the control signal may be a logic "low", and T3=2S is not limited to the illustrated time, and may be within 0 to 16S, for example).
4. Power on-off control function and soft on, soft off:
automatically performing 'power off-delay' after a certain time is met after a valid key input is detected ― Power on "procedure.
The control circuit drives the control signal of the switch circuit and has the functions of soft start and soft turn-off.
Switching circuits on the power supply path can cause overshoot, kickback, if too fast on/off, which can be detrimental to the load system. And the smooth power-on and power-off of the system are realized through soft turn-on and soft turn-off.
In fig. 10A and 10B, the control signal 2 has soft-on and soft-off functions. The "control output 3" may be a control signal for other devices of the system, for example: a load device. The logic of the control signal is not limited to that shown in fig. 10A and 10B, and T0=2mS in fig. 10A and 10B.
5. Power adapter access detection function
In this embodiment, the mobile communication device has a power adapter access detection function and has a false touch prevention capability.
As shown in fig. 4, after the mobile communication device enters the "off mode", when the power adapter is detected to be connected, the mobile communication device exits the "off mode" and enters the "on mode".
In the equivalent diagram of fig. 4, vref is a reference voltage generated inside the power control IC and connected to the inverting input terminal of the comparator.
The capacitors C and R1 form RC (resistance capacitance) filtering, so that a miscellaneous signal of a detection interface of the power adapter can be filtered out, and false detection is avoided; namely: and (4) filtering the ripple waves.
The resistors R2 and R1 form a voltage division circuit to prevent the power supply control IC from being burnt out due to overhigh voltage input to the detection interface of the power supply adapter from the outside.
The diode D is an electrostatic discharge (ESD) protection device, and protects the detection interface of the power adapter from electrostatic damage.
As will be described in more detail below with respect to the circuit configuration shown in fig. 3, the power control IC has an input (i.e., the input voltage VIN) connected to the battery, and an output (i.e., the voltage output VOUT) connected to the charging IC. And connecting the output end of the power adapter. The Key pin (Key) is used for receiving a Key signal. According to the embodiment of the invention, the VOUT of the power supply control IC is utilized to realize the access detection of the power supply adapter. The method comprises the following specific steps: when the power adapter is connected, the charging IC starts to work and outputs a default voltage, and meanwhile, the battery is detected to supply power to the VOUT pin of the power control IC, so that the internal part of VOUT can detect the input of a voltage. Since the power supply control IC is turned off between VIN and VOUT in this process, the voltage of the power supply cannot be injected into the VOUT terminal through the internal circuit. Therefore, the power adapter can be determined to be connected by confirming the rising voltage of the VOUT end at the moment. In this embodiment, the VOUT pin has a power adapter detection function (i.e., a voltage input detection function, TA _ Det)
In the present embodiment, ripple filtering may be performed inside the VOUT pin of the power control IC to prevent false triggering, as shown in fig. 5.
And a VOUT pin of the power supply control IC is connected with the power supply passage and the power adapter detection circuit. A switching device is arranged on the power supply circuit to control the on and off of VOUT and VIN. When the power supply path is conducted, the detection of the power supply adapter is not needed. Only after the power path is disconnected does it need to know whether a power adapter is connected. Therefore, the application scenario of the embodiment of the present invention is that after the power path is disconnected, the insertion of the power adapter is detected, and then the power path can be automatically connected.
When the power path is off, there is no voltage at the VOUT pin when no power adapter is plugged in. When the power adapter is connected, the pin VOUT receives a voltage, the voltage reaches the homodromous input end of the comparator after passing through the resistor R1, so that the trigger signal output by the comparator is changed from low to high, and the signal is sent to the control circuit of the power control IC to trigger the conduction of a power supply path.
In addition, in the circuit shown in fig. 3, the charging IC is a circuit for managing charging, and therefore, in order to ensure the stability and controllability of the voltage of the input device, a field effect transistor and an inductor are provided therein, and a switching pin is also provided in the charging IC; the grid electrode of the field effect transistor is connected with an input voltage end, and the drain electrode of the field effect transistor is connected with VOUT; one end of the inductor is connected with the source electrode of the field effect transistor, and the other end of the inductor is connected with the switch pin.
As shown in fig. 11, which is a working state diagram of mode conversion according to the embodiment of the present invention, the mobile communication device, in the off mode, receives a valid key signal or a detection signal accessed by the power adapter, and enters the on mode; the mobile communication equipment is in a conducting mode, and can enter a turn-off mode or a reset mode if a valid key signal indicates that the mobile communication equipment is in the conducting mode; wherein the conducting mode can be entered again after the reset is finished. The on/off of the switch circuit is controlled by using a control signal 2 to realize switching between an on mode and an off mode, the on/off of the discharge circuit is controlled by using a control signal 1 to control whether to enter a reset mode, and correspondingly, an external load device can be controlled by using a control signal 3 to reset.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the embodiment of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (12)
1. A power supply control apparatus, wherein the power supply control apparatus is applied to a mobile communication device, the power supply control apparatus comprising:
an input detection circuit, a control circuit and a discharge circuit;
the input detection circuit is provided with an input interface, and a first output end of the input detection circuit is connected with a first input end of the control circuit;
the first output end of the control circuit is connected with the input end of the discharge circuit, and the second output end of the control circuit is connected with the switch circuit;
one end of the discharge circuit is connected with the load equipment, and the other end of the discharge circuit is grounded; in the conducting state of the discharge circuit, the charge on the load equipment is discharged through the discharge circuit;
one end of the switch circuit is connected with the load equipment, and the other end of the switch circuit is connected with the battery; when the switch circuit is in a conducting state, the battery provides electric energy for the load equipment through the switch circuit;
the input detection circuit generates a corresponding detection signal after an input interface of the input detection circuit detects effective input, the detection signal reaches the control circuit through a first input end of the control circuit, and the control circuit generates a control signal according to the detection signal and sends the control signal to the switch circuit and/or the discharge circuit respectively to enable the switch circuit to be switched on or enable the switch circuit to be switched off and enable the discharge circuit to be switched on and then switched off;
wherein the input detection circuit comprises:
a charging integrated circuit and a power control integrated circuit;
the charging integrated circuit is provided with a power adapter interface and a voltage output interface; the power supply control integrated circuit is provided with a power supply adapter detection interface, or the power supply control integrated circuit is provided with a power supply adapter detection interface and a key detection interface;
the voltage output interface of the charging integrated circuit is connected with the power adapter detection interface of the power control integrated circuit;
after the power adapter interface is connected with a power adapter, the voltage output interface of the charging integrated circuit outputs voltage to the power adapter detection interface of the power control integrated circuit, and the power control integrated circuit determines that the adapter is accessed after the power adapter detection interface monitors the voltage;
wherein the power control integrated circuit monitoring the voltage at the power adapter detection interface comprises:
the power control integrated circuit comprises a comparator and a first resistor;
the reverse input end of the comparator is connected with a reference voltage, the same-direction input end of the comparator is connected with one end of the first resistor, and the other end of the first resistor is connected with a power adapter detection interface of the power control integrated circuit;
when the power adapter detection interface of the power control integrated circuit has voltage, the voltage of the power adapter detection interface of the power control integrated circuit reaches the homodromous input end of the comparator through the first resistor, so that the output signal of the comparator changes.
2. The power control device of claim 1, wherein the input interface of the input detection circuit comprises: a power adapter detection interface or a key detection interface; the input detection circuit generates a corresponding detection signal after the input interface thereof detects a valid input, and the detection signal comprises:
when the switch circuit is in an off state, the input detection circuit detects that the power adapter detection interface has voltage input or the input detection circuit detects that a key instruction for controlling to enter a conducting mode is detected at the key detection interface, and then a first detection signal is generated;
the control circuit generates control signals according to the detection signals and sends the control signals to the switch circuit and/or the discharge circuit respectively, and the switching circuit is conducted by the control circuit, the control circuit comprises:
the control circuit generates a first control signal according to the first detection signal and sends the first control signal to the switch circuit, so that the switch circuit is conducted.
3. The power control device of claim 2, wherein the power control integrated circuit further comprises:
and one end of the second resistor is connected between the first resistor and a power adapter detection interface of the power control integrated circuit, and the other end of the second resistor is grounded.
4. The power control device of claim 1, wherein the power control integrated circuit further comprises:
and one end of the second resistor is connected between the first resistor and a power adapter detection interface of the power control integrated circuit, and the other end of the second resistor is grounded.
5. The power control device of claim 4, wherein the power control integrated circuit further comprises:
and one end of the ESD protection device is connected between the first resistor and the equidirectional input end of the comparator, and the other end of the ESD protection device is grounded.
6. The power control device of claim 4, wherein the power control integrated circuit further comprises:
a capacitor; one end of the capacitor is connected between the first resistor and a power adapter detection interface of the power control integrated circuit, and the other end of the capacitor is grounded.
7. The power control device of claim 1, wherein the input interface of the input detection circuit comprises: a key detection interface;
the input detection circuit generates a corresponding detection signal after the input interface thereof detects a valid input, and the detection signal comprises:
the input detection circuit receives a key instruction for controlling to enter a turn-off mode through the key detection interface, and then generates a second detection signal;
the control circuit generates control signals according to the detection signals and sends the control signals to the switch circuit and/or the discharge circuit respectively, and the steps of enabling the switch circuit to be disconnected and enabling the discharge circuit to be disconnected after being switched on comprise:
and the control circuit generates a second control signal according to the second detection signal and sends the second control signal to the switching circuit and the discharge circuit respectively, so that the switching circuit is disconnected and the discharge circuit is disconnected after being switched on.
8. The power control device according to any one of claims 1 to 7, wherein the detection signal includes a pulse signal having a high-low duty ratio.
9. The power control device of claim 8, wherein the control signal is delayed from being sent after the detection signal is sent.
10. The power control apparatus of claim 7, wherein the third output of the control circuit is connected to the load device;
delaying the sending of a third control signal to the load device after the control circuit sends the second control signal, for controlling the load device to stop working; the second control signal has a buffering time from an initial level to a highest level or to a lowest level.
11. The power control device of claim 10, wherein the second control signal is logically opposite to the third control signal level.
12. The power supply control device according to claim 10 or 11, characterized by further comprising: a timing circuit;
the second output end of the input detection circuit is connected with the input end of the timing circuit; the output end of the timing circuit is connected with the second input end of the control circuit;
the detection signal enters the timing circuit through a second output end of the input detection circuit, and the timing circuit generates a signal for informing the control circuit that the delay time is up after the required delay time is over.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910227729.5A CN109980722B (en) | 2016-05-18 | 2016-05-18 | Power supply control device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910227729.5A CN109980722B (en) | 2016-05-18 | 2016-05-18 | Power supply control device |
| CN201610334647.7A CN106026224B (en) | 2016-05-18 | 2016-05-18 | A kind of power control |
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| CN201610334647.7A Division CN106026224B (en) | 2016-05-18 | 2016-05-18 | A kind of power control |
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| CN201910227729.5A Active CN109980722B (en) | 2016-05-18 | 2016-05-18 | Power supply control device |
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| CN106778702B (en) * | 2017-01-22 | 2023-12-05 | 深圳芯启航科技有限公司 | Fingerprint identification module and device |
| CN114448411A (en) * | 2020-11-02 | 2022-05-06 | 圣邦微电子（北京）股份有限公司 | Key control circuit and method for battery connection or disconnection and related equipment thereof |
| CN113394467B (en) * | 2021-05-07 | 2022-07-22 | 深圳市金研微科技有限公司 | Intelligent battery for mobile terminal equipment |
| CN113394838B (en) * | 2021-05-08 | 2022-04-22 | 荣耀终端有限公司 | Terminal device and charging circuit |
| CN115729305A (en) * | 2021-08-30 | 2023-03-03 | 中移物联网有限公司 | Power supply control circuit and method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102854966A (en) * | 2012-08-15 | 2013-01-02 | 天地融科技股份有限公司 | Electronic equipment and power management circuit |
| CN103633709A (en) * | 2013-12-11 | 2014-03-12 | Tcl通讯（宁波）有限公司 | Charge recognition system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101043144B (en) * | 2007-04-06 | 2010-05-19 | 炬力集成电路设计有限公司 | Electrical source managing method of portable electronic products and apparatus thereof |
| CN203705875U (en) * | 2014-02-25 | 2014-07-09 | 青岛歌尔声学科技有限公司 | One-button multifunctional control circuit and wearable electronic product |
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2016
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102854966A (en) * | 2012-08-15 | 2013-01-02 | 天地融科技股份有限公司 | Electronic equipment and power management circuit |
| CN103633709A (en) * | 2013-12-11 | 2014-03-12 | Tcl通讯（宁波）有限公司 | Charge recognition system and method |
Also Published As
| Publication number | Publication date |
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| CN109980722A (en) | 2019-07-05 |
| CN106026224B (en) | 2019-04-02 |
| CN106026224A (en) | 2016-10-12 |
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