CN102291879B - Control circuit, method and device for charging indicator light as well as charging device - Google Patents
Control circuit, method and device for charging indicator light as well as charging device Download PDFInfo
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- CN102291879B CN102291879B CN201110130787.XA CN201110130787A CN102291879B CN 102291879 B CN102291879 B CN 102291879B CN 201110130787 A CN201110130787 A CN 201110130787A CN 102291879 B CN102291879 B CN 102291879B
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Abstract
The embodiment of the invention discloses a control circuit for a charging indicator light. The control circuit comprises a first reference voltage input end, a first MOS (Metal Oxide Semiconductor), a GPIO (General Purpose Input/Output) pin end, a second reference voltage input end, the charging indicator light and a second MOS. The first MOS is connected with the first reference voltage input end, the GPIO pin end is connected with a grid of the first MOS, the second reference voltage input end is connected between the GPIO pin end and the first MOS, the charging indicator light is connected with the first reference voltage input end, a drain of the second MOS is connected with the charging indicator light, and a grid of the second MOS is connected between the first reference voltage input end and the first MOS. In the control circuit, the output level of the GPIO pin end is pulled up or down through the second reference voltage input end, thus the first MOS and the second MOS are controlled to be switched on or off, and the charging indicator light is controlled to be on or off. The embodiment of the invention further discloses a control method and device for the charging indicator light and a charging device comprising the control circuit for the charging indicator light. According to the invention, a problem of mis-indication of the charging indicator light is solved.
Description
Technical field
The present invention relates to the control circuit of electronic applications, particularly relate to a kind of control circuit of control terminal charging indicator light, charging indicator light control method and device, charging device.
Background technology
The charging indicator light of terminal is for notifying user: just in charging, in the design of existing a lot of terminal, the function of charging indicator light is very general for user terminal.In the design of existing terminal charge indicator light, as long as terminal plugs charger and be in "on" position, indicator light will be lit.
In prior art, charging indicator light control circuit comprises the charging voltage module for providing charging voltage, baseband chip for transmission level signal controls leaded molded, for the MOS type field effect transistor module of control circuit switch, be used to indicate the indicating lamp module whether terminal is in charged state.
As shown in Figure 1, charging voltage module comprises charging voltage, and baseband chip controls the leaded molded baseband chip that comprises and controls pin, and MOS type field effect transistor module comprises metal-oxide-semiconductor Q1 and Q2, and charging indicator light module comprises indicator light LED; Wherein baseband chip controls the output of pin GPIO acquiescence is low level, and resistance R2 is the current-limiting resistance of LED, regulates the size of R2 to obtain different lamp brightness.Because the brightness of charging indicator light does not need real-time adjustment, thus brightness as required in advance the value of R2 can be set; In addition, charging voltage connects metal-oxide-semiconductor Q1 and Q2 by resistance R1, is wherein the source ground of low level, Q1 under default conditions, and grid is connected to baseband chip and controls pin and by resistance R3 ground connection; R3 is pull down resistor, and the resistance range of choice of R3 is generally 10 kilohms to 100 kilohms; Because baseband chip control pin acquiescence is low level, thus Q1 acquiescence is cut-off state, and Q2 conducting, so charging indicator light is lit immediately after plugging charger; But, the present inventor finds in long-term R & D work, when one plugs charger, terminal also will judge charge condition, the ID of such as battery detects whether correctly namely whether battery legal, the temperature of battery whether in allowed limits etc., so now also may not start charging by battery, namely be lit once plugging electric charging indicator light, it is incorrect that instruction is being charged.
When charging indicator light is in illuminating state, if because the ID of battery detects incorrect or battery temperature is too high, terminal closes charging circuit, and namely in fact terminal is not in charged state, so terminal will be caused still to be in the misunderstanding of charged state to user; The design that charging indicator light lighted by obvious insertion charger is at once irrational.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of charging indicator light control circuit, charging indicator light control method and device, charging device, can solve the problem after terminal plugs charger, charging indicator light being correctly lit.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is:
A kind of charging indicator light control circuit, comprising:
First reference voltage input terminal, the first reference voltage input terminal is used for providing charging voltage;
Charging indicator light, the first end of charging indicator light connects the first reference voltage;
First metal-oxide-semiconductor, the drain electrode of the first metal-oxide-semiconductor connects the first reference voltage input terminal, source ground;
GPIO pin end, GPIO pin end connects the grid of the first metal-oxide-semiconductor;
Second reference voltage input terminal VDD, second reference voltage input terminal VDD is connected between the grid of GPIO pin end and the first metal-oxide-semiconductor, and the requirement that the second reference voltage input terminal VDD is used for lighting according to described charging indicator light or extinguish drags down or draw high the outputs level signals of GPIO pin; Wherein, GPIO pin end acquiescence output low level, the second reference voltage input terminal VDD gives tacit consent to voltage supply, and the low level that GPIO pin end acquiescence exports drawn high, charging indicator light LED is in OFF state; When the charger energising of terminal, charging indicator light LED can not be lit at once; Described second reference voltage input terminal VDD not voltage supply when detecting the ID of battery and the temperature of battery and determine that battery is in charged state, the outputs level signals dragging down GPIO pin makes charging indicator light light; Recover voltage supply when determining that battery charging is complete or temperature is too high and not being in charged state, the outputs level signals drawing high GPIO pin makes charging indicator light extinguish;
Second metal-oxide-semiconductor, the drain electrode of described second metal-oxide-semiconductor connects the second end of charging indicator light, and the grid of described second metal-oxide-semiconductor is connected between the drain electrode of described first reference voltage input terminal and described first metal-oxide-semiconductor;
First voltage providing end, described first voltage providing end connects the source electrode of described first metal-oxide-semiconductor, and the voltage that described first voltage providing end provides is less than the input voltage of described first reference voltage input terminal;
Second voltage providing end, described second voltage providing end connects the source electrode of described second metal-oxide-semiconductor, and the voltage that described second voltage providing end provides is less than the input voltage of described second reference voltage input terminal VDD;
Described charging indicator light control circuit also comprises the 3rd resistance, and one end of described 3rd resistance connects the second reference voltage, and the other end is connected between described GPIO pin and described first metal-oxide-semiconductor.
Further, charging indicator light control circuit also comprises the first resistance, and one end of the first resistance connects the first reference voltage, and the other end connects the drain electrode of the first metal-oxide-semiconductor.
Further, charging indicator light control circuit also comprises the second resistance, and one end of the second resistance connects the second end of charging indicator light, and the other end connects the drain electrode of the second metal-oxide-semiconductor.
Further, the source electrode of the first metal-oxide-semiconductor can also connect the first voltage providing end, and the input voltage of the first voltage providing end is less than the input voltage of the first reference voltage input terminal.
Further, the source electrode of the second metal-oxide-semiconductor can also connect the second voltage providing end, and the input voltage of the second voltage providing end is less than the input voltage of the second reference voltage input terminal VDD.
For solving the problems of the technologies described above, another technical solution used in the present invention is:
A kind of charging indicator light control method, comprising:
GPIO pin end acquiescence output low level, the second reference voltage input terminal VDD gives tacit consent to voltage supply, and the low level that GPIO pin end acquiescence exports drawn high, charging indicator light LED is in OFF state; When the charger energising of terminal, charging indicator light LED can not be lit at once;
Receive the first status signal that battery charger exports, this first status signal shows detect the ID of battery and the temperature of battery and determine that battery is in charged state;
Export the first control signal to charging indicator light control circuit, control the second reference voltage input terminal VDD not voltage supply, make it output low level with the voltage dragging down GPIO pin end, be in illuminating state to make charging indicator light;
Also comprise after charging indicator light control circuit exports the step of the first control signal:
Receive the second status signal that battery charger exports, the second status signal shows that battery charging is complete or temperature is too high and is in non-charged state;
Export the second control signal to charging indicator light control circuit, make it to export high level with the voltage drawing high GPIO pin end, be in OFF state to make charging indicator light;
Described charging indicator light control circuit also comprises the 3rd resistance, and one end of described 3rd resistance connects the second reference voltage, and the other end is connected between described GPIO pin and described first metal-oxide-semiconductor.
For solving the problems of the technologies described above, another technical scheme that the present invention adopts is:
A kind of charging indicator light control device, comprising:
Receiver module, for receiving the first status signal that battery charger exports, this first status signal shows detect the ID of battery and the temperature of battery and determine that battery is in charged state; Receiver module is also for receiving the second status signal that battery charger exports, and the second status signal shows that battery charging is complete or temperature is too high and is in non-charged state;
First control signal output module, for when receiver module receives the first status signal, the first control signal is exported to charging indicator light control circuit, control the second reference voltage input terminal VDD not voltage supply, make it output low level with the voltage dragging down GPIO pin end, be in illuminating state to make charging indicator light;
Device also comprises:
Second control signal output module, for when receiver module receives the second status signal, export the second control signal to charging indicator light control circuit, make it to export high level with the voltage drawing high GPIO pin end, be in OFF state to make charging indicator light;
GPIO pin end acquiescence output low level, the second reference voltage input terminal VDD gives tacit consent to voltage supply, and the low level that GPIO pin end acquiescence exports drawn high, charging indicator light LED is in OFF state; When the charger energising of terminal, charging indicator light LED can not be lit at once;
Described charging indicator light control circuit also comprises the 3rd resistance, and one end of described 3rd resistance connects the second reference voltage, and the other end is connected between described GPIO pin and described first metal-oxide-semiconductor.
For solving the problems of the technologies described above, another technical scheme that the present invention adopts is:
A kind of charging device, comprises above-mentioned charging indicator light control circuit and above-mentioned charging indicator light control device.
The invention has the beneficial effects as follows: the situation being different from prior art, the present invention is in charging indicator light control circuit, between control pin GPIO and the first metal-oxide-semiconductor, the second reference voltage is set, when non-charging, the output level of pin GPIO is drawn high by this second reference voltage, make the first metal-oxide-semiconductor conducting, second metal-oxide-semiconductor cut-off, thus make charging indicator light be in OFF state; When terminal detects that battery ID is correct and charges to battery, the output level of pin GPIO drags down by the second reference voltage, makes the first metal-oxide-semiconductor cut-off, the second metal-oxide-semiconductor conducting, thus is lighted by charging indicator light; The charging indicator light control circuit of the application of the invention, when charger one is plugged, indicator light can not be lit at once, but detects that when charging to battery, indicator light is just lighted, and can solve the problem of terminal charge indicator light misdirection.
Accompanying drawing explanation
Fig. 1 is the control circuit figure of prior art charging indicator light;
Fig. 2 is the control circuit figure of charging indicator light embodiment of the present invention;
Fig. 3 is the data flowchart of the first embodiment of charging indicator light control method of the present invention;
Fig. 4 is the data flowchart of the second embodiment of charging indicator light control method of the present invention;
Fig. 5 is the building-block of logic of the first embodiment of charging indicator light control device of the present invention;
Fig. 6 is the building-block of logic of the second embodiment of charging indicator light control device of the present invention.
Embodiment
Consult Fig. 2, embodiment of the present invention charging indicator light control circuit comprises:
First reference voltage input terminal VCHG, the first metal-oxide-semiconductor Q1, GPIO pin end, the second reference voltage input terminal VDD, charging indicator light LED and the second metal-oxide-semiconductor Q2;
Wherein, the drain electrode of the first metal-oxide-semiconductor Q1 connects the first reference voltage input terminal VCHG, one end of GPIO pin end connects the grid of the first metal-oxide-semiconductor Q1, GPIO pin end acquiescence output low level signal, second reference voltage input terminal VDD is connected between GPIO pin end and the first metal-oxide-semiconductor Q1, second reference voltage input terminal VDD is for drawing high the outputs level signals of GPIO pin end, the first end of charging indicator light LED connects the first reference voltage input terminal VCHG, second end connects the drain electrode of the second metal-oxide-semiconductor Q2, the grid of the second metal-oxide-semiconductor Q2 is connected between the drain electrode of the first reference voltage input terminal VCHG and the first metal-oxide-semiconductor Q1,
In the present embodiment, GPIO pin end acquiescence output low level, the second reference voltage input terminal VDD gives tacit consent to voltage supply, the low level that GPIO pin end acquiescence exports is drawn high, thus making the first metal-oxide-semiconductor Q1 conducting and the second metal-oxide-semiconductor Q2 ends, charging indicator light LED is in OFF state; So when the charger energising of terminal, charging indicator light LED can not be lit at once, only have when the state-detection of terminal to battery complete and determine that battery is in charged state time, second reference voltage input terminal VDD not voltage supply is set, now, first metal-oxide-semiconductor Q1 ends and the second metal-oxide-semiconductor Q2 conducting, and charging indicator light LED is in and is lit; When charging is complete, or terminal detects that battery temperature is too high and stops when charging to battery, recovers the voltage supply of two reference voltage VDD, draws high the output level of GPIO pin end, thus making the first metal-oxide-semiconductor Q1 conducting and the second metal-oxide-semiconductor Q2 ends, charging indicator light LED is extinguished;
In a particular embodiment, the source electrode of the first metal-oxide-semiconductor Q1 can ground connection, also can connect the first voltage providing end, and the input voltage of the first voltage providing end is less than the input voltage of the first reference voltage input terminal VCHG;
The source electrode of the second metal-oxide-semiconductor Q2 can ground connection, also can connect the second voltage providing end, and the input voltage of the second voltage providing end is less than the input voltage of the second reference voltage input terminal VDD;
Further, charging indicator light control circuit in the present embodiment can also comprise the first resistance R1, first resistance R1 is arranged between the first reference voltage input terminal VCHG and the first metal-oxide-semiconductor Q1, namely one end of the first resistance R1 connects the first reference voltage input terminal VCHG, and the other end connects the drain electrode of the first metal-oxide-semiconductor Q1; First resistance R1 can avoid the situation of circuit accidental short circuit, improves the security performance of circuit;
Further, charging indicator light control circuit in the present embodiment can also comprise the second resistance R2, second resistance R2 is arranged between charging indicator light LED and the second metal-oxide-semiconductor Q2, and namely one end of the second resistance R2 connects charging indicator light LED, and the other end connects the drain electrode of the second metal-oxide-semiconductor Q2; Second resistance R2 can limit the voltage at charging indicator light LED two ends, charging indicator light LED is played to the effect of protection; Second resistance can be adjustable resistance, for regulating the brightness of charging indicator light LED;
Further, the charging indicator light control circuit in the present embodiment can also comprise the 3rd resistance R3, and one end of the 3rd resistance R3 connects the second reference voltage input terminal VDD, and the other end is connected between GPIO pin end and the first metal-oxide-semiconductor Q1; For avoiding producing too much electric current on the 3rd resistance R3, the resistance value of the 3rd resistance R3 can be set as 100 kilo-ohms; 3rd resistance R3 is arranged in order to avoid the overtension of the second reference voltage input terminal VDD;
Operation principle the following detailed description of charging indicator light control circuit in the present embodiment:
After terminal plugs battery charger, the second reference voltage input terminal VDD gives tacit consent to voltage supply, and draw high the level that GPIO pin end exports, thus make the first metal-oxide-semiconductor Q1 conducting and the second metal-oxide-semiconductor Q2 ends, charging indicator light LED is in OFF state;
When terminal detects the ID of battery and the temperature of battery and judges that terminal can be charged and charge to terminal, second reference voltage input terminal VDD not voltage supply, the level of the output of GPIO pin end is dragged down, namely the grid voltage of the first metal-oxide-semiconductor Q1 is zero volt, now the first metal-oxide-semiconductor Q1 ends, the grid voltage of the second metal-oxide-semiconductor Q2 is just the first reference voltage input terminal VCHG, the second metal-oxide-semiconductor Q2 conducting, and charging indicator light LED is lit;
After charging, or in charging process, terminal detects that battery temperature is too high and stops when charging to battery, recovers the voltage supply of the second reference voltage input terminal VDD, then the first metal-oxide-semiconductor Q1 conducting and the second metal-oxide-semiconductor Q2 end, and charging indicator light LED is extinguished;
It is pointed out that terminal is carried out detecting can be realized by the method for software approach or software and hardware combining the ID of battery and the temperature of battery etc., prior art is comparative maturity, is not emphasis of the present invention herein, does not repeat herein.
More than can find out, in the present embodiment, by in charging indicator light control circuit, between control pin GPIO and the first metal-oxide-semiconductor Q1, the second reference voltage input terminal VDD is set, the voltage supply of this second reference voltage acquiescence, draws high the output level of pin GPIO, makes the first metal-oxide-semiconductor Q1 conducting, second metal-oxide-semiconductor Q2 ends, thus makes charging indicator light LED be in OFF state; When the second reference voltage input terminal VDD not voltage supply, pin GPIO output low level, the first metal-oxide-semiconductor Q1 ends, the second metal-oxide-semiconductor Q2 conducting, thus lights charging indicator light LED; By controlling the second reference voltage input terminal VDD determining voltage supply when battery is in charged state, the not voltage supply when battery is not in charged state, thus the correct instruction that charging indicator light can be guaranteed.
Refer to Fig. 3, in the embodiment of the present invention, the first embodiment of charging indicator light control method comprises:
301, the first status signal that battery charger exports is received;
When battery charger detects that battery changes charged state into from non-charged state, export the first status signal to charging indicator light control device, wherein the first status signal shows that battery is in charged state;
After charging indicator light control device receives the first status signal of battery charger output, perform step 302; Wherein, charging indicator light control device can be the main control chip of terminal, can be also other control chips or device, limit herein;
302, the first control signal is exported to charging indicator light control circuit;
Charging indicator light control device exports the first control signal to charging indicator light control circuit, makes it output low level with the voltage dragging down GPIO pin end, be in illuminating state to make charging indicator light after receiving the first status signal of battery charger output;
In the present embodiment, when charging indicator light control device receive battery change charged state into from non-charged state time, the first status signal that battery charger exports, then the first control signal is exported to charging indicator light control circuit, make it output low level with the voltage dragging down GPIO pin end, be in illuminating state to make charging indicator light; Thus ensure that battery is in charged state really, charging indicator light is just lit, thus ensure that the correct instruction of charging indicator light.
Refer to Fig. 4, in the embodiment of the present invention, the second embodiment of charging indicator light control method comprises:
401, the first status signal that battery charger exports is received;
When battery charger detects that battery changes charged state into from non-charged state, export the first status signal to main control chip, wherein the first status signal shows that battery is in charged state;
After main control chip receives the first status signal of battery charger output, perform step 402;
Concrete:
First pin of main control chip connects battery charger, and wherein concrete link position is prior art, is not emphasis of the present invention, does not repeat herein;
Second pin of main control chip connects battery charger, wherein concrete link position, and such as, Fig. 2 is the circuit diagram of the control circuit embodiment of invention charging indicator light, and in fig. 2, the second pin of main control chip connects the second reference voltage input terminal VDD;
402, the first control signal is exported to charging indicator light control circuit;
Main control chip exports the first control signal to charging indicator light control circuit, makes it output low level with the voltage dragging down GPIO pin end, be in illuminating state to make charging indicator light after receiving the first status signal of battery charger output;
Same for the circuit diagram of Fig. 2, main control chip exports the first control signal to charging indicator light control circuit, control the second reference voltage input terminal VDD not voltage supply, namely the voltage of the second reference voltage input terminal VDD is zero, thus dragged down the voltage of GPIO pin end, GPIO pin end output low level, so the first metal-oxide-semiconductor Q1 ends, second metal-oxide-semiconductor Q2 conducting, indicator light LED is lit;
403, the second status signal that battery charger exports is received;
When battery charger detects that battery changes non-charged state into from charged state, export the second status signal to main control chip, after main control chip receives the second status signal of battery charger output, perform step 404;
404, the second control signal is exported to charging indicator light control circuit;
Main control chip exports the second control signal to charging indicator light control circuit after receiving the second status signal of battery charger output, makes it to export high level, be in OFF state to make charging indicator light with the voltage drawing high GPIO pin end;
Same for the circuit diagram of Fig. 2, main control chip exports the second control signal to charging indicator light control circuit, recover the voltage supply of the second reference voltage input terminal VDD, namely the voltage of the second reference voltage input terminal VDD is non-vanishing and be less than the first reference voltage input terminal VCHG, thus drawn high the voltage of GPIO pin end, GPIO pin end exports high level, so the first metal-oxide-semiconductor Q1 conducting, second metal-oxide-semiconductor Q2 ends, and indicator light LED is extinguished;
So when one plugs charger, because whether need to detect battery ID correct, whether battery temperature is applicable to charging etc., and battery can not be in charged state, and indicator light also should not be lit at once at once; By the method in the embodiment of the present invention, when detecting that battery is in charged state really, charging indicator light is just lit; And if detect that in charging process battery temperature is too high, be not suitable for continuing charging, for the purpose of safety, need to stop battery charging, now charging indicator light should extinguish immediately at once; By the method in the embodiment of the present invention, when battery runs down being detected, when not being in charged state, charging indicator light is extinguished; So the method provided in the present embodiment can guarantee the correct instruction of charging indicator light.
Refer to Fig. 5, in the embodiment of the present invention, the first embodiment of charging indicator light control device comprises:
Receiver module 501, for receiving the first status signal that battery charger exports, this first status signal shows that battery is in charged state;
First control signal output module 502, for when receiver module 501 receives the first status signal, export the first control signal to charging indicator light control circuit, make it output low level with the voltage dragging down GPIO pin end, be in illuminating state to make charging indicator light;
In the present embodiment, when charging indicator light control device receive battery change charged state into from non-charged state time, the first status signal that battery charger exports, then the first control signal is exported to charging indicator light control circuit, make it output low level with the voltage dragging down GPIO pin end, be in illuminating state to make charging indicator light; Thus ensure that battery is in charged state really, charging indicator light is just lit, thus ensure that the correct instruction of charging indicator light.
Refer to Fig. 6, in the embodiment of the present invention, the second embodiment of charging indicator light control device comprises:
Receiver module 601, for receiving the first status signal and second status signal of battery charger output, wherein the first status signal shows that battery is in charged state, and the second status signal shows that battery is in non-charged state;
First control signal output module 602, for when receiver module 601 receives the first status signal, export the first control signal to charging indicator light control circuit, make it output low level with the voltage dragging down GPIO pin end, be in illuminating state to make charging indicator light;
This charging indicator light control device also comprises:
Second control signal output module 603, for when receiver module 601 receives the second status signal, export the second control signal to charging indicator light control circuit, make it to export high level with the voltage drawing high GPIO pin end, be in OFF state to make charging indicator light;
In the present embodiment, when charging indicator light control device receive battery change charged state into from non-charged state time, the first status signal that battery charger exports, then the first control signal is exported to charging indicator light control circuit, make it output low level with the voltage dragging down GPIO pin end, be in illuminating state to make charging indicator light; When charging indicator light control device receive battery change non-charged state into from charged state time, the second status signal that battery charger exports, then the second control signal is exported to charging indicator light control circuit, make it to export high level with the voltage drawing high GPIO pin end, be in OFF state to make charging indicator light; Thus ensure that battery is in charged state really, charging indicator light is just lit, thus ensure that the correct instruction of charging indicator light.
In the embodiment of another charging device of the present invention, this charging device includes the charging indicator light control circuit in above-described embodiment, and charging indicator light control device; The detailed description of this charging indicator light control circuit and charging indicator light control device refers to above-described embodiment, does not repeat herein; This charging indicator light control circuit is set in charging device, can better for the battery charge condition of charging device indicates, solve terminal and do not consider that whether the ID detection of battery is correct or whether battery temperature is too high, charging circuit is actual is in off-state, and charging indicator light is in the problem of illuminating state, i.e. the problem of indicator light misdirection.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize specification of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (7)
1. a charging indicator light control circuit, is characterized in that, comprising:
First reference voltage input terminal, described first reference voltage input terminal is used for providing charging voltage;
Charging indicator light, the first end of described charging indicator light connects described first reference voltage input terminal;
First metal-oxide-semiconductor, the drain electrode of described first metal-oxide-semiconductor connects described first reference voltage input terminal;
GPIO pin end, described GPIO pin end connects the grid of described first metal-oxide-semiconductor;
Second reference voltage input terminal VDD, described second reference voltage input terminal VDD is connected between the grid of described GPIO pin end and described first metal-oxide-semiconductor, and the requirement that described second reference voltage input terminal VDD is used for lighting according to described charging indicator light or extinguish drags down or draw high the outputs level signals of described GPIO pin; Wherein, GPIO pin end acquiescence output low level, the second reference voltage input terminal VDD gives tacit consent to voltage supply, and the low level that GPIO pin end acquiescence exports drawn high, charging indicator light LED is in OFF state; When the charger energising of terminal, charging indicator light LED can not be lit at once; Described second reference voltage input terminal VDD not voltage supply when detecting the ID of battery and the temperature of battery and determine that battery is in charged state, the outputs level signals dragging down described GPIO pin makes described charging indicator light light; Recover voltage supply when determining that battery charging is complete or temperature is too high and not being in charged state, the outputs level signals drawing high described GPIO pin makes described charging indicator light extinguish;
Second metal-oxide-semiconductor, the drain electrode of described second metal-oxide-semiconductor connects the second end of described charging indicator light, and the grid of described second metal-oxide-semiconductor is connected between the drain electrode of described first reference voltage input terminal and described first metal-oxide-semiconductor;
First voltage providing end, described first voltage providing end connects the source electrode of described first metal-oxide-semiconductor, and the voltage that described first voltage providing end provides is less than the input voltage of described first reference voltage input terminal;
Second voltage providing end, described second voltage providing end connects the source electrode of described second metal-oxide-semiconductor, and the voltage that described second voltage providing end provides is less than the input voltage of described second reference voltage input terminal VDD;
Described charging indicator light control circuit also comprises the 3rd resistance, and one end of described 3rd resistance connects the second reference voltage input terminal VDD, and the other end is connected between described GPIO pin and described first metal-oxide-semiconductor.
2. charging indicator light control circuit according to claim 1, it is characterized in that, described charging indicator light control circuit also comprises the first resistance, and one end of described first resistance connects described first reference voltage input terminal, and the other end connects the drain electrode of described first metal-oxide-semiconductor.
3. charging indicator light control circuit according to claim 2, it is characterized in that, described charging indicator light control circuit also comprises the second resistance, and one end of described second resistance connects the second end of described charging indicator light, and the other end connects the drain electrode of described second metal-oxide-semiconductor.
4. charging indicator light control circuit according to claim 3, is characterized in that, described first voltage providing end is earth terminal; And/or described second voltage providing end is earth terminal.
5. a charging indicator light control method, is characterized in that, comprising:
GPIO pin end acquiescence output low level, the second reference voltage input terminal VDD gives tacit consent to voltage supply, and the low level that GPIO pin end acquiescence exports drawn high, charging indicator light LED is in OFF state; When the charger energising of terminal, charging indicator light LED can not be lit at once;
Receive the first status signal that battery charger exports, described first status signal shows detect the ID of battery and the temperature of battery and determine that battery is in charged state;
Export the first control signal to charging indicator light control circuit, control the second reference voltage input terminal VDD not voltage supply, make it output low level with the voltage dragging down GPIO pin end, be in illuminating state to make charging indicator light;
Describedly also to comprise after charging indicator light control circuit exports the step of the first control signal:
Receive the second status signal that battery charger exports, described second status signal shows that battery charging is complete or temperature is too high and is in non-charged state;
Export the second control signal to charging indicator light control circuit, make it to export high level with the voltage drawing high GPIO pin end, be in OFF state to make charging indicator light;
Described charging indicator light control circuit comprises the first reference voltage input terminal, the first metal-oxide-semiconductor, GPIO pin end, the second reference voltage input terminal VDD, charging indicator light and the second metal-oxide-semiconductor;
Wherein, the drain electrode of the first metal-oxide-semiconductor connects the first reference voltage input terminal, one end of GPIO pin end connects the grid of the first metal-oxide-semiconductor, second reference voltage input terminal VDD is connected between GPIO pin end and the first metal-oxide-semiconductor, the first end of charging indicator light connects the first reference voltage input terminal, second end of charging indicator light connects the drain electrode of the second metal-oxide-semiconductor, and the grid of the second metal-oxide-semiconductor is connected between the drain electrode of the first reference voltage input terminal and the first metal-oxide-semiconductor;
The source electrode of the first metal-oxide-semiconductor connects the first voltage providing end, and the input voltage of the first voltage providing end is less than the input voltage of the first reference voltage input terminal;
The source electrode of the second metal-oxide-semiconductor connects the second voltage providing end, and the input voltage of the second voltage providing end is less than the input voltage of the second reference voltage input terminal;
Described charging indicator light control circuit also comprises the 3rd resistance, and one end of described 3rd resistance connects the second reference voltage input terminal VDD, and the other end is connected between described GPIO pin and described first metal-oxide-semiconductor.
6. a charging indicator light control device, is characterized in that, comprising:
Receiver module, for receiving the first status signal that battery charger exports, described first status signal shows detect the ID of battery and the temperature of battery and determine that battery is in charged state; Described receiver module is also for receiving the second status signal that battery charger exports, and described second status signal shows that battery charging is complete or temperature is too high and is in non-charged state;
First control signal output module, for when receiver module receives the first status signal, the first control signal is exported to charging indicator light control circuit, control the second reference voltage input terminal VDD not voltage supply, make it output low level with the voltage dragging down GPIO pin end, be in illuminating state to make charging indicator light;
Described device also comprises:
Second control signal output module, for when receiver module receives the second status signal, export the second control signal to charging indicator light control circuit, make it to export high level with the voltage drawing high GPIO pin end, be in OFF state to make charging indicator light;
GPIO pin end acquiescence output low level, the second reference voltage input terminal VDD gives tacit consent to voltage supply, and the low level that GPIO pin end acquiescence exports drawn high, charging indicator light LED is in OFF state; When the charger energising of terminal, charging indicator light LED can not be lit at once;
Described charging indicator light control circuit comprises the first reference voltage input terminal, the first metal-oxide-semiconductor, GPIO pin end, the second reference voltage input terminal VDD, charging indicator light and the second metal-oxide-semiconductor;
Wherein, the drain electrode of the first metal-oxide-semiconductor connects the first reference voltage input terminal, one end of GPIO pin end connects the grid of the first metal-oxide-semiconductor, second reference voltage input terminal VDD is connected between GPIO pin end and the first metal-oxide-semiconductor, the first end of charging indicator light connects the first reference voltage input terminal, second end of charging indicator light connects the drain electrode of the second metal-oxide-semiconductor, and the grid of the second metal-oxide-semiconductor is connected between the drain electrode of the first reference voltage input terminal and the first metal-oxide-semiconductor;
The source electrode of the first metal-oxide-semiconductor connects the first voltage providing end, and the input voltage of the first voltage providing end is less than the input voltage of the first reference voltage input terminal;
The source electrode of the second metal-oxide-semiconductor connects the second voltage providing end, and the input voltage of the second voltage providing end is less than the input voltage of the second reference voltage input terminal;
Described charging indicator light control circuit also comprises the 3rd resistance, and one end of described 3rd resistance connects the second reference voltage input terminal VDD, and the other end is connected between described GPIO pin and described first metal-oxide-semiconductor.
7. a charging device, is characterized in that, comprises claim 1 to the charging indicator light control circuit one of claim 4 Suo Shu and charging indicator light control device according to claim 6.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110130787.XA CN102291879B (en) | 2011-05-19 | 2011-05-19 | Control circuit, method and device for charging indicator light as well as charging device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110130787.XA CN102291879B (en) | 2011-05-19 | 2011-05-19 | Control circuit, method and device for charging indicator light as well as charging device |
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| CN102291879A CN102291879A (en) | 2011-12-21 |
| CN102291879B true CN102291879B (en) | 2015-02-11 |
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| CN103902928B (en) * | 2014-03-24 | 2017-01-11 | 同方计算机有限公司 | Network physical isolation device |
| CN107733004B (en) * | 2017-09-26 | 2023-12-19 | 大唐终端技术有限公司 | Multi-platform hardware dynamic charging indication and charging gate breaking device |
| CN108270275A (en) * | 2018-03-30 | 2018-07-10 | 上海创功通讯技术有限公司 | A kind of indicating circuit for being used to indicate charging process, method and terminal |
| CN109638912B (en) * | 2018-12-19 | 2022-07-26 | 努比亚技术有限公司 | Charging indicating device and terminal |
| CN112309022A (en) * | 2020-10-22 | 2021-02-02 | 天津时利和企业管理咨询有限公司 | Multifunctional docking station of face recognition terminal |
| CN112469176B (en) * | 2020-12-21 | 2022-04-22 | 珠海格力电器股份有限公司 | Control circuit and method for preventing false lighting of indicator lamp, storage medium and apparatus |
| WO2023246413A1 (en) * | 2022-06-21 | 2023-12-28 | 西安稳先半导体科技有限责任公司 | System control circuit, indication assembly, and electronic atomization apparatus |
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| KR100262305B1 (en) * | 1997-08-25 | 2000-07-15 | 강병호 | A smart battery, and power supply for notebook computer using a smart battery |
| CN201204479Y (en) * | 2008-06-06 | 2009-03-04 | 广州南科集成电子有限公司 | Control integrated circuit for lithium battery charger and electrification indication control circuit thereof |
| US20110163723A1 (en) * | 2008-09-23 | 2011-07-07 | Stl Energy Technology (S) Pte Ltd | Battery pack and method of battery pack power management |
| CN201466772U (en) * | 2009-06-19 | 2010-05-12 | 深圳市欧美亚实业有限公司 | Charger management circuit |
| CN201781310U (en) * | 2010-04-29 | 2011-03-30 | 比亚迪股份有限公司 | Battery charge control circuit |
| CN101969483B (en) * | 2010-08-02 | 2014-07-30 | 惠州Tcl移动通信有限公司 | Indication circuit of mobile phone |
| CN201781299U (en) * | 2010-08-05 | 2011-03-30 | 惠州Tcl移动通信有限公司 | Circuit for controlling on/off of battery charging path and battery |
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