CN201945944U - Power-supply control circuit, power-supply control unit and portable electronic device thereof - Google Patents
Power-supply control circuit, power-supply control unit and portable electronic device thereof Download PDFInfo
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- CN201945944U CN201945944U CN2010206966889U CN201020696688U CN201945944U CN 201945944 U CN201945944 U CN 201945944U CN 2010206966889 U CN2010206966889 U CN 2010206966889U CN 201020696688 U CN201020696688 U CN 201020696688U CN 201945944 U CN201945944 U CN 201945944U
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Abstract
The utility model discloses a power-supply control circuit applicable to a portable electronic device, which comprises a flip-flop, a first circuit and a second circuit, wherein the input end of the flip-flop is coupled with a standby voltage source, the output end of the flip-flop is coupled with a power supply unit, and the frequency end of the flip-flop is coupled with a power supply switch; the first circuit is coupled between the frequency end of the flip-flop and a processing unit and is used for outputting a break-off signal to the processing unit when the power supply switch is trigged, and the second circuit is coupled between the resetting end of the flip-flop and the processing unit and is used for triggering the resetting end according to a turn-off signal transmitted by the processing unit so as to ensure that the output end is reset by the flip-flop to turn off the power supply unit, and the processing unit generates the turn-off signal after completing one turn-off procedure. The utility model further discloses a power-supply control unit applicable to the portable electronic device.
Description
Technical field
The utility model relates to a kind of power control circuit, and particularly relevant for a kind of power control circuit and device that is applicable to portable electronic devices.
Background technology
Portable electronic devices (portable electrical device) is also referred to as running gear (mobiledevice) or hand-held device (handheld device), for example mobile phone, mobile computer, flat computer or MP3 walkman etc.In today, portable electronic devices can be described as quite universal, and almost everyone has electronic installations such as mobile phone or MP3 walkman.Portable electronic devices has incorporated our life, becomes the indispensable necessity of people.
General handheld apparatus can (system on chip SOC) enters standby mode (standby mode) to save the power consumption of machine when the shutdown, increases the service time of battery with system single chip under off-mode.Though this power consumption in standby mode under of system single chip is milliampere (mA) grade, electric weight that still can consuming cells, the service time of minimizing battery.Best power saving mode is directly with the power-off of system single chip, and power consumption is reduced to micromicroampere (μ A) grade in the time of like this can be with standby.But the design of present hand system, system single chip need be handled lot of data, will be a quite dangerous thing if arbitrarily directly cut away power supply.Because directly power-off may be caused the damage of system single chip or the loss of its data.This may cause the damage of operating system and influence the operation of portable electronic devices.
The utility model content
The purpose of this utility model is to provide a kind of power control circuit.
Another purpose of the present utility model is to provide a kind of power control.
Another purpose of the present utility model is to provide a kind of portable electronic devices with above-mentioned power control circuit and power control.
For achieving the above object, the power control circuit that the utility model provides is applicable to the power supply of controlling a portable electronic devices, and this portable electronic devices has a processing unit, a power switch and a power-supply unit, its, this power control circuit comprises:
One flip-flop has an input end, an output terminal, a frequency end, a setting end and a replacement end, and this input end is coupled to a standby voltage source, and this output terminal is coupled to this power-supply unit, and this frequency end is coupled to this power switch;
One first circuit is coupled between first end of this frequency end and this processing unit, exports a look-at-me when this power switch is triggered to this processing unit; And
One second circuit, be coupled between second end of this replacement end and this processing unit, trigger this replacement end according to the off signal that this processing unit sent, make this flip-flop reset this output terminal to close this power-supply unit, wherein this processing unit produces this off signal after finishing a shutdown programm.
Described power control circuit, wherein this power control circuit comprises:
One first resistance is coupled between this setting end and this standby voltage source;
One second resistance is coupled between this standby voltage source and this input end; And
One the 3rd resistance is coupled between this replacement end and this standby voltage source.
Described power control circuit, wherein this first circuit comprises:
One the 4th resistance is coupled to first end of a system voltage source and this processing unit;
One diode, the anode of this diode are coupled to first end of this processing unit, and the negative electrode of this diode is coupled to this frequency end;
One the 5th resistance is coupled between this standby voltage source and this frequency end; And
One first electric capacity is coupled between this a frequency end and the earth terminal.
Described power control circuit, wherein this second circuit comprises:
One the 6th resistance, first end of the 6th resistance is coupled to second end of this processing unit;
One the 7th resistance is coupled between second end and an earth terminal of the 6th resistance;
One NPN transistor, the base stage of this NPN transistor are coupled to second end of the 6th resistance, and the collection utmost point of this NPN transistor is coupled to this replacement end of this flip-flop, and the emitter-base bandgap grading of this NPN transistor is coupled to this earth terminal; And
One second electric capacity is coupled to this replacement end and this earth terminal.
Described power control circuit, wherein this second circuit comprises:
One the 6th resistance, first end of the 6th resistance are coupled to this second end of this processing unit;
One the 7th resistance is coupled between second end and this earth terminal of the 6th resistance;
One NPN transistor, the base stage of this NPN transistor are coupled to second end of the 6th resistance, and the collection utmost point of this NPN transistor is coupled to this replacement end of this flip-flop, and the emitter-base bandgap grading of this NPN transistor is coupled to this earth terminal; And
One second electric capacity is coupled to this replacement end and this earth terminal.
Described power control circuit, wherein this second circuit comprises:
One the 6th resistance, first end of the 6th resistance are coupled to this second end of this processing unit;
One the 7th resistance is coupled between second end and an earth terminal of the 6th resistance;
One MOS transistor, the grid of this MOS transistor are coupled to second end of the 6th resistance, and first end of this MOS transistor is coupled to this replacement end of this flip-flop, and second end of this MOS transistor is coupled to this earth terminal; And
One second electric capacity is coupled to this replacement end and this earth terminal.
Described power control circuit, wherein this power switch is coupled between this a frequency end and the earth terminal.
Described power control circuit, wherein this flip-flop is a D type flip-flop.
Described power control circuit, wherein this flip-flop comprises:
One standard D type flip-flop has this input end, this output terminal, this frequency end, one first setting end and this first replacement end;
One first phase inverter, the input end of this first phase inverter are coupled to this setting end, and the output terminal of this first phase inverter is coupled to this first setting end; And
One second phase inverter, the input end of this second phase inverter are coupled to this replacement end, and the output terminal of this second phase inverter is coupled to this first replacement end.
The power control that the utility model provides is applicable to the power supply of controlling a portable electronic devices, and this portable electronic devices has a processing unit and a power-supply unit, and wherein, this power control comprises:
One power switch; And
One power control circuit, this power control circuit comprises:
One flip-flop has an input end, an output terminal, a frequency end, a setting end and a replacement end, and this input end is coupled to a standby voltage source, and this output terminal is coupled to this power-supply unit, and this frequency end is coupled to this power switch;
One first circuit is coupled between first end of this frequency end and this processing unit, exports a look-at-me when this power switch is triggered to this processing unit; And
One second circuit, be coupled between second end of this replacement end and this processing unit, trigger this replacement end according to the off signal that this processing unit sent, make this flip-flop reset this output terminal to close this power-supply unit, wherein this processing unit produces this off signal after finishing a shutdown programm.
The portable electronic devices that the utility model provides, wherein, this portable electronic devices comprises:
One processing unit;
One power-supply unit;
One power switch; And
One power control circuit, this power control circuit comprises:
One flip-flop has an input end, an output terminal, a frequency end, a setting end and a replacement end, and this input end is coupled to a standby voltage source, and this output terminal is coupled to this power-supply unit, and this frequency end is coupled to this power switch;
One first circuit is coupled between first end of this frequency end and this processing unit, exports a look-at-me when this power switch is triggered to this processing unit; And
One second circuit, be coupled between second end of this replacement end and this processing unit, trigger this replacement end according to the off signal that this processing unit sent, make this flip-flop reset this output terminal to close this power-supply unit, wherein this processing unit produces this off signal after finishing a shutdown programm.
When power control circuit of the present utility model is pressed (activation) at power switch, can shut down by first reporting system, waiting system is just closed primary power (power-supply unit) after finishing shutdown programm.Thus, electrical source consumption in the time of can reducing standby and the system failure of avoiding sudden power to cause.In addition, also can be the user in a certain period not during operative installations, the power supply of stopping device voluntarily is to save electric power.
Description of drawings
Fig. 1 is the functional block diagram according to the portable electronic devices of the utility model first embodiment.
Fig. 2 A illustrates the circuit diagram of the power control 120 of the utility model first embodiment.
Fig. 2 B is the oscillogram of the utility model first embodiment.
Fig. 3 illustrates the circuit diagram of the power control 120 of the utility model second embodiment.
Primary clustering symbol description in the accompanying drawing:
The 100-portable electronic devices; The 110-processing unit; 111-first end; 112-second end; The 120-power control; The 122-power control circuit; The 124-power switch; The 130-power-supply unit; The INT-look-at-me; The APO-off signal; The CS-control signal; The D-input end; The Q-output terminal; C-frequency end; S-sets end; The R-end of resetting;
-reversed-phase output; VSB-standby voltage source; The V33-system voltage source; R1～R7-resistance; The SW-power switch; The D1-diode; C1～C2-electric capacity; The GND-earth terminal; The B1-NPN transistor; SS-first sets end; RR-first resets and holds; The 205-flip-flop; 210 first circuit; 220 second circuits; 251,253 negative pulses; 252,254 waveforms; 305 standard D type flip-flops; 310,320 phase inverters.
Embodiment
The utility model provides a kind of power control circuit, power control and has the portable electronic devices of above-mentioned power control circuit and power control.Under the state of shutdown, the user presses power switch starter gear normally; Under the state that uses, after the user pressed power switch, power control circuit can send one and interrupt signal, the shutdown of notifier processes unit user's desire.Then, processing unit can begin to enter shutdown programm.After system finished shutdown programm, power control circuit was again with power-off, avoided system because of fault and the electrical source consumption when reducing standby of cutting off the electricity supply suddenly thus.Device can also be in user's a certain period not during operative installations, and the power supply of stopping device is to save electric power voluntarily.
The utility model provides a kind of power control circuit, be applicable to the power supply of control one portable electronic devices, this portable electronic devices has a processing unit, a power switch and a power-supply unit, and this power control circuit comprises a flip-flop one first circuit and a second circuit.Flip-flop has an input end, an output terminal, a frequency end, sets end and a replacement is held, and this input end is coupled to a standby voltage source, and this output terminal is coupled to this power-supply unit, and this frequency end is coupled to this power switch.First circuit is coupled between first end of this frequency end and this processing unit, in order to export a look-at-me to this processing unit when this power switch is triggered.Second circuit is coupled between second end of this replacement end and this processing unit, in order to trigger this replacement end according to the off signal that this processing unit sent, make this flip-flop reset this output terminal to close this power-supply unit, wherein this processing unit produces this off signal after finishing a shutdown programm.
In the utility model one embodiment, above-mentioned power control circuit also comprises one first resistance, one second resistance and one the 3rd resistance.First resistance is coupled between this setting end and this standby voltage source; Second resistance is coupled between this standby voltage source and this input end; The 3rd resistance is coupled between this replacement end and this standby voltage source.
In the utility model one embodiment, above-mentioned this first circuit comprises one the 4th resistance, a diode, one the 5th resistance and one first electric capacity.The 4th resistance is coupled to first end of system voltage source and this processing unit.The anode of diode is coupled to first end of this processing unit, and the negative electrode of this diode is coupled to this frequency end.The 5th resistance is coupled between this standby voltage source and this frequency end.First electric capacity is coupled between this a frequency end and the earth terminal.
In the utility model one embodiment, above-mentioned second circuit comprises one the 6th resistance, one the 7th resistance, a NPN transistor and one second electric capacity.First end of the 6th resistance is coupled to second end of this processing unit.The 7th resistance is coupled between second end and an earth terminal of the 6th resistance.The base stage of this NPN transistor is coupled to second end of the 6th resistance, and the collection utmost point of this NPN transistor is coupled to this replacement end of this flip-flop, and the emitter-base bandgap grading of this NPN transistor is coupled to this earth terminal.Second electric capacity is coupled to this replacement end and this earth terminal.
In the utility model one embodiment, above-mentioned flip-flop is the D type flip-flop of specific model or is made up of standard D type flip-flop and phase inverter.
The utility model proposes a kind of power control in addition, be applicable to the power supply of control one portable electronic devices, this portable electronic devices has a processing unit and a power-supply unit, this power control comprises a power switch and above-mentioned power control circuit, and wherein the frequency end of the flip-flop in the power control circuit is coupled to this power switch.
The utility model proposes a kind of portable electronic devices again, comprises a processing unit, a power-supply unit, a power switch and above-mentioned power control circuit.Power control circuit comprises a flip-flop, one first circuit and a second circuit.Flip-flop has an input end, an output terminal, a frequency end, sets end and a replacement is held, and this input end is coupled to a standby voltage source, and this output terminal is coupled to this power-supply unit, and this frequency end is coupled to this power switch.First circuit is coupled between first end of this frequency end and this processing unit, in order to export a look-at-me to this processing unit when this power switch is triggered.Second circuit is coupled between second end of this replacement end and this processing unit, in order to trigger this replacement end according to the off signal that this processing unit sent, make this flip-flop reset this output terminal to close this power-supply unit, wherein this processing unit produces this off signal after finishing a shutdown programm.
For above-mentioned feature and advantage of the present utility model can be become apparent, below elaborate especially exemplified by embodiment and conjunction with figs..
First embodiment
Please refer to Fig. 1, Fig. 1 is the functional block diagram according to the portable electronic devices of the utility model first embodiment.Portable electronic devices 100 comprises processing unit 110, power control 120 and power-supply unit 130.Power control 120 comprises power control circuit 122 and power switch 124, and wherein power switch 124 is coupled to power control circuit 122, and power control circuit 122 is coupled to processing unit 110 and power-supply unit 130.Processing unit 110 for example is the system single chip in the portable electronic devices 100, and power switch 124 for example is the button or the switch that can rebound automatically, but the utility model is not restricted to this.
When power switch 124 was triggered (pressing), power control circuit 122 can go to notifier processes unit 110 to prepare shutdown by output look-at-me INT.Processing unit 110 can begin to carry out shutdown programm after receiving look-at-me INT, data that for example storing is untreated finishes and carry out software shutdown supervisor, but the utility model is not restricted to this.After processing unit 110 is finished shutdown programm, can produce off signal APO and give power control circuit 122, make power control circuit 122 output control signal CS remove powered-down feeding unit 130.Power-supply unit 130 for example is the primary power in the portable electronic devices 100, and its power supply source for example is rechargeable battery or charger, but the utility model is not restricted to this.
In other words, after power switch 124 is pressed by the user, power control 120 can't cut out primary power at once, but can wait for that processing unit 110 finishes behind the shutdown programm just powered-down feeding unit 130 and stop 110 power supplies of 130 pairs of processing units of power-supply unit.
Next, further specify the circuit embodiment of power control 120.Please be simultaneously with reference to Fig. 1 and Fig. 2 A, Fig. 2 A illustrates the circuit diagram of the power control 120 of the utility model first embodiment.Power switch 124 is realized with power switch SW among above-mentioned Fig. 1, and power control circuit 122 then comprises flip-flop 205, first circuit 210, second circuit 220 and resistance R 1～R3.Flip-flop 205 has input end D, output terminal Q, frequency end C, sets end S, resets and hold R and reversed-phase output
Output terminal Q is coupled to power-supply unit 130, and frequency end C is coupled to power switch SW.Resistance R 1 is coupled to standby voltage source V SB and sets between the end S, and resistance R 2 is coupled between standby voltage source V SB and the input end D, and resistance R 3 is coupled to be reset between end R and the standby voltage source V SB.The current potential that output terminal Q is exported is control signal CS.
Next, further specify the circuit operation mode of Fig. 2 A, please in the lump with reference to figure 2A and Fig. 2 B, Fig. 2 B is the oscillogram of the utility model first embodiment.At first, in Fig. 2 B, with " 1 " expression noble potential, with " 0 " expression electronegative potential.Voltage source standby voltage source V SB among Fig. 2 AB for example is the standby power in the system, is provided by lithium battery usually but not is provided by power-supply unit 130.System voltage source V33 can be identical with processing unit 110 employed power supplys.Output terminal Q is that noble potential " 1 " is then represented power-on feeding unit 130, and output terminal Q is that electronegative potential " 0 " is then represented powered-down feeding unit 130.Under off-mode, the user can be via pressing the signal that power switch SW can make a negative pulse 251 of frequency end C generation of flip-flop 205.Because the input end D of flip-flop 205 is a noble potential, powers with power-on feeding unit 130 so the output terminal Q of flip-flop 205 can be converted to noble potential.Owing to system voltage source V33 can rise along with system's power supply, so look-at-me INT can be converted to noble potential (waveform 252).
Under open state, if system need enter the state of automatic shutdown, the off signal APO that processing unit 110 can directly be exported noble potential makes the output terminal Q of flip-flop 205 be converted to electronegative potential with powered-down feeding unit 130.In addition, the user also can be by the action of shutting down of operating power switch SW.When the user pressed power switch SW once more under open state, frequency end C can produce negative pulse 253, and the look-at-me INT that produces negative pulse simultaneously carries out shutdown programm with notifier processes unit 110.At this moment, the current potential of the output terminal Q of flip-flop 205 maintains noble potential, the influence of unaffected negative pulse 253.After finishing shutdown programm, can export processing unit 110 the off signal APO (waveform 254) of noble potential with conducting NPN transistor B1.The conducting meeting of NPN transistor B1 makes the replacement end R of flip-flop 205 be converted to electronegative potential, and then makes output terminal Q be converted to electronegative potential with powered-down feeding unit 130.Because this moment, processing unit 110 was finished shutdown programm, so even power-supply unit 130 is closed the normal operation that also can not influence system.
In addition, it should be noted that after power-supply unit 130 was closed, processing unit 110 can lose power supply and make NPN transistor B1 close (ending).The replacement end R of flip-flop 205 can be converted to noble potential, makes flip-flop 205 return to original state.In addition, when power supply or main battery rigidly connected, the replacement end R of flip-flop 205 can produce so have of short duration electronegative potential because capacitor C 2 is still uncharged be finished, and make output terminal Q be converted to electronegative potential and powered-down feeding unit 130.After capacitor C 2 chargings were finished, the current potential of the replacement end R of flip-flop 205 can be in the state of noble potential.At this moment, unless processing unit 110 output off signal APO, the influence of end R otherwise flip-flop 205 can not be subjected to resetting.The principle of operation of flip-flop 205 please refer to the instructions of the D type flip-flop of model TC7WH74FU that TOSHIBA for example produces or TC7WH74FK, does not add tired stating at this.
In addition, it should be noted that circuit among above-mentioned Fig. 2 A and Fig. 2 B and signal mode only are embodiment of the present utility model, the judgement of its high and low current potential is selected for use and can be set according to design requirement with accurate of activation.For example, then only need increase a reverser and get final product at second end 112 of processing unit 110 if will represent shutdown with the off signal APO of electronegative potential.NPN transistor B1 among Fig. 2 A uses as switch, in another embodiment of the utility model, can utilize metal oxide semiconductcor field effect transistor (Metal-Oxide-Semiconductor Field-Effect Transistor) to realize, NMOSFET for example, the utility model is not restricted to this.The circuit of above-mentioned Fig. 2 A can be adjusted or increases and decreases assembly according to design requirement, and according to the above description, those skilled in the art should know other embodiment by inference, does not add tired stating at this.
Second embodiment
Model TC7WH74FU of producing except TOSHIBA or the D type flip-flop of TC7WH74FK, the flip-flop 205 among above-mentioned Fig. 2 A also can use standard D flip-flop and phase inverter to realize.Please refer to Fig. 3, Fig. 3 illustrates the circuit diagram of the power control 120 of the utility model second embodiment.Fig. 3 and the main difference of Fig. 2 A are standard D type flip-flop 305 and phase inverter 310,320.D type flip-flop compared to standard, the setting end S of the flip-flop 205 among Fig. 2 is to use anti-phase signal to trigger with the signal of the end R that resets, and just when the end R that resets was electronegative potential, its output terminal Q was an electronegative potential, when setting end S was electronegative potential, its output terminal Q was a noble potential.The such triggering mode just triggering mode with standard D type flip-flop is opposite.Therefore, in Fig. 3, the first setting end SS of standard D type flip-flop 305 is coupled to phase inverter 310, the first replacement end RR and then is coupled to phase inverter 320 to replace the flip-flop 205 among Fig. 2 A.The input end of phase inverter 310 can be considered the setting end S among Fig. 2 A, and the input end of phase inverter 320 then can be considered the replacement end R among Fig. 2 A.Remaining circuit framework among Fig. 3 is identical with Fig. 2 A, and its explanation please refer to the explanation of above-mentioned first embodiment, does not add tired stating at this.D type flip-flop 205,305 among above-mentioned first embodiment and second embodiment can be made up of other flip-flop, for example SR flip-flop or JK flip-flop etc., after via above-mentioned explanation, those skilled in the art should utilize other flip-flop to realize D type flip-flop 205,305, do not add tired stating at this.
In addition, it should be noted that the electric connection that the relation of coupling comprises directly or indirectly or both walk abreast between the said modules, as long as can reach required electrical signal transfer function, present embodiment is not limited.The electric connection that the relation of coupling between the said modules comprises directly or indirectly or both walk abreast, as long as can reach required electrical signal transfer function, present embodiment is not limited.Technological means in the foregoing description can merge or use separately, and the utility model is not limited.Electronic package among Fig. 2 A and Fig. 3 can have the difference on the function because of label, model different, and its peripheral circuit can be according to the design requirement adjustment, and embodiment of the present utility model is not restricted among Fig. 2 A and Fig. 3.After the explanation via the foregoing description, those skilled in the art should know other embodiment by inference, do not add tired stating at this.
In sum, power control circuit of the present utility model has the effect that postpones shutdown, and it can cooperate the off signal APO of processing unit to shut down.Power-supply unit can just be cut off the electricity supply after processing unit is finished shutdown programm, avoids system data to damage and the consumption of reduction power thus.
Though preferred embodiment of the present utility model has disclosed as above; right the utility model is not limited to the foregoing description; those skilled in the art are in the scope that does not break away from the utility model and disclosed; when can doing a little change and adjustment, therefore the content that defined of the claim scope that should apply for of protection domain of the present utility model is as the criterion.
Claims (11)
1. a power control circuit is applicable to the power supply of controlling a portable electronic devices, and this portable electronic devices has a processing unit, a power switch and a power-supply unit, it is characterized in that, this power control circuit comprises:
One flip-flop has an input end, an output terminal, a frequency end, a setting end and a replacement end, and this input end is coupled to a standby voltage source, and this output terminal is coupled to this power-supply unit, and this frequency end is coupled to this power switch;
One first circuit is coupled between first end of this frequency end and this processing unit, exports a look-at-me when this power switch is triggered to this processing unit; And
One second circuit, be coupled between second end of this replacement end and this processing unit, trigger this replacement end according to the off signal that this processing unit sent, make this flip-flop reset this output terminal to close this power-supply unit, wherein this processing unit produces this off signal after finishing a shutdown programm.
2. power control circuit according to claim 1 is characterized in that, this power control circuit comprises:
One first resistance is coupled between this setting end and this standby voltage source;
One second resistance is coupled between this standby voltage source and this input end; And
One the 3rd resistance is coupled between this replacement end and this standby voltage source.
3. power control circuit according to claim 1 is characterized in that, this first circuit comprises:
One the 4th resistance is coupled to first end of a system voltage source and this processing unit;
One diode, the anode of this diode are coupled to first end of this processing unit, and the negative electrode of this diode is coupled to this frequency end;
One the 5th resistance is coupled between this standby voltage source and this frequency end; And
One first electric capacity is coupled between this a frequency end and the earth terminal.
4. power control circuit according to claim 1 is characterized in that, this second circuit comprises:
One the 6th resistance, first end of the 6th resistance is coupled to second end of this processing unit;
One the 7th resistance is coupled between second end and an earth terminal of the 6th resistance;
One NPN transistor, the base stage of this NPN transistor are coupled to second end of the 6th resistance, and the collection utmost point of this NPN transistor is coupled to this replacement end of this flip-flop, and the emitter-base bandgap grading of this NPN transistor is coupled to this earth terminal; And
One second electric capacity is coupled to this replacement end and this earth terminal.
5. power control circuit according to claim 3 is characterized in that, this second circuit comprises:
One the 6th resistance, first end of the 6th resistance are coupled to this second end of this processing unit;
One the 7th resistance is coupled between second end and this earth terminal of the 6th resistance;
One NPN transistor, the base stage of this NPN transistor are coupled to second end of the 6th resistance, and the collection utmost point of this NPN transistor is coupled to this replacement end of this flip-flop, and the emitter-base bandgap grading of this NPN transistor is coupled to this earth terminal; And
One second electric capacity is coupled to this replacement end and this earth terminal.
6. power control circuit according to claim 1 is characterized in that, this second circuit comprises:
One the 6th resistance, first end of the 6th resistance are coupled to this second end of this processing unit;
One the 7th resistance is coupled between second end and an earth terminal of the 6th resistance;
One MOS transistor, the grid of this MOS transistor are coupled to second end of the 6th resistance, and first end of this MOS transistor is coupled to this replacement end of this flip-flop, and second end of this MOS transistor is coupled to this earth terminal; And
One second electric capacity is coupled to this replacement end and this earth terminal.
7. power control circuit according to claim 1 is characterized in that, this power switch is coupled between this a frequency end and the earth terminal.
8. power control circuit according to claim 1 is characterized in that, this flip-flop is a D type flip-flop.
9. power control circuit according to claim 1 is characterized in that, this flip-flop comprises:
One standard D type flip-flop has this input end, this output terminal, this frequency end, one first setting end and this first replacement end;
One first phase inverter, the input end of this first phase inverter are coupled to this setting end, and the output terminal of this first phase inverter is coupled to this first setting end; And
One second phase inverter, the input end of this second phase inverter are coupled to this replacement end, and the output terminal of this second phase inverter is coupled to this first replacement end.
10. a power control is applicable to the power supply of controlling a portable electronic devices, and this portable electronic devices has a processing unit and a power-supply unit, it is characterized in that, this power control comprises:
One power switch; And
One power control circuit, this power control circuit comprises:
One flip-flop has an input end, an output terminal, a frequency end, a setting end and a replacement end, and this input end is coupled to a standby voltage source, and this output terminal is coupled to this power-supply unit, and this frequency end is coupled to this power switch;
One first circuit is coupled between first end of this frequency end and this processing unit, exports a look-at-me when this power switch is triggered to this processing unit; And
One second circuit, be coupled between second end of this replacement end and this processing unit, trigger this replacement end according to the off signal that this processing unit sent, make this flip-flop reset this output terminal to close this power-supply unit, wherein this processing unit produces this off signal after finishing a shutdown programm.
11. a portable electronic devices is characterized in that, this portable electronic devices comprises:
One processing unit;
One power-supply unit;
One power switch; And
One power control circuit, this power control circuit comprises:
One flip-flop has an input end, an output terminal, a frequency end, a setting end and a replacement end, and this input end is coupled to a standby voltage source, and this output terminal is coupled to this power-supply unit, and this frequency end is coupled to this power switch;
One first circuit is coupled between first end of this frequency end and this processing unit, exports a look-at-me when this power switch is triggered to this processing unit; And
One second circuit, be coupled between second end of this replacement end and this processing unit, trigger this replacement end according to the off signal that this processing unit sent, make this flip-flop reset this output terminal to close this power-supply unit, wherein this processing unit produces this off signal after finishing a shutdown programm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206966889U CN201945944U (en) | 2010-12-31 | 2010-12-31 | Power-supply control circuit, power-supply control unit and portable electronic device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206966889U CN201945944U (en) | 2010-12-31 | 2010-12-31 | Power-supply control circuit, power-supply control unit and portable electronic device thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201945944U true CN201945944U (en) | 2011-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206966889U Expired - Fee Related CN201945944U (en) | 2010-12-31 | 2010-12-31 | Power-supply control circuit, power-supply control unit and portable electronic device thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201945944U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103676752A (en) * | 2012-09-13 | 2014-03-26 | 昆达电脑科技(昆山)有限公司 | Power front-end monitoring device |
| TWI462440B (en) * | 2012-11-21 | 2014-11-21 | Sk Hynix Inc | Low standby consumption power supply system having multi-channels for power supply |
-
2010
- 2010-12-31 CN CN2010206966889U patent/CN201945944U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103676752A (en) * | 2012-09-13 | 2014-03-26 | 昆达电脑科技(昆山)有限公司 | Power front-end monitoring device |
| TWI462440B (en) * | 2012-11-21 | 2014-11-21 | Sk Hynix Inc | Low standby consumption power supply system having multi-channels for power supply |
| US9520745B2 (en) | 2012-11-21 | 2016-12-13 | SK Hynix Inc. | Low standby consumption power supply system having multi-channels for power supply |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110824 Termination date: 20161231 |
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| CF01 | Termination of patent right due to non-payment of annual fee |