CN102854966A - Electronic equipment and power management circuit - Google Patents
Electronic equipment and power management circuit Download PDFInfo
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- CN102854966A CN102854966A CN2012102908623A CN201210290862A CN102854966A CN 102854966 A CN102854966 A CN 102854966A CN 2012102908623 A CN2012102908623 A CN 2012102908623A CN 201210290862 A CN201210290862 A CN 201210290862A CN 102854966 A CN102854966 A CN 102854966A
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Abstract
The invention provides electronic equipment and a power management circuit, wherein the electronic equipment comprises a power port, a power management module, a power control module and a switch K1, the power port is used for providing power to the electronic equipment; the power management module is used for outputting the power or stopping outputting the power through a power output pin after a control signal input pin receives a power management control signal for connecting the power supply or for connecting the power and disconnecting the power; the power control module comprises a power input pin and an IO (Input/Output) pin; the power input pin is used for receiving the power output from the power output pin of the power management module; the IO pin is used for outputting the power management control signal to the control signal input pin of the power management module; the switch K1 is used for outputting the power management control signal for connecting the power to the control signal input pin when being closed; and the switch K1 is an unlocked switch. With the adoption of the electronic equipment and the power management circuit, the unlocked switch can be used for turning on the electronic equipment; when the switch is used as a turn-on press key, the electronic equipment can be turned off through the sending of a signal under special conditions after being turned on; after being turned off, the electronic equipment consumes no power; and therefore, the power consumption of the electronic equipment is saved.
Description
Technical field
The present invention relates to electronic technology field, relate in particular to electronic equipment and electric power management circuit.
Background technology
Along with the user is more and more higher to the requirement of the integration of electronic equipment and portability, carry out research and development and when design of electronic equipment, need on the one hand to consider several functions to be integrated in the single electronic equipment as far as possible, also need on the other hand to consider the portable requirement to electronic equipment.In order to satisfy portable requirement, usually need electronic equipment can use powered battery, and volume can not be excessive.
In order to satisfy the demand of user, Design of power saving has become the in recent years research direction of electronic equipment.In order to reduce the power consumption of electronic equipment, can consider in electronic equipment, to use the element of low-power consumption, also can consider in electronic equipment, to adopt power management scheme, reduce the overall power consumption of electronic equipment by the power consumption that reduces idle assembly in the electronic equipment.
When adopting the power management scheme of prior art, when electronic equipment was in dormant state, the subelement of this electronic equipment (for example, processor) need to be in low power consumpting state, so that the instruction that wakes up to the user responds, enter duty from dormant state.Obviously, when adopting the power management scheme of prior art, even under dormant state, electronic equipment still can consume certain electric energy.
Enter the state that does not consume electric energy if wish electronic equipment, usually need to use the special switch that is arranged in the electronic equipment (for example in the prior art, self-locking type switch) closes electronic equipment in the mode of interrupting power circuit, after adopting this mode to close electronic equipment, can only use special switch to reopen electronic equipment in the mode of plugged circuit, electronic equipment can't be based on the response rearming to some event or signal; Equally, behind the mode unlocking electronic equipment of use special switch with the plugged circuit, electronic equipment also can't be based on electronic equipment is closed in the response of some event or signal.Obviously, above-mentioned special switch can not adopt the employed pushbutton switch open in usual of similar keyboard, so this special switch can not be used for inputting other signal to electronic equipment except start signal and off signal.
Summary of the invention
Technical matters to be solved by this invention is, overcome the deficiencies in the prior art, providing a kind of adopts not latch switch (for example, pushbutton switch open in usual) operation of starting shooting, the electronic equipment that electronic equipment is changed over to the electric power management circuit of duty and comprises this electric power management circuit from the off-mode of idle.
The objective of the invention is to be achieved through the following technical solutions:
One aspect of the present invention provides a kind of electronic equipment, comprises for the power port that power supply is provided to described electronic equipment; This electronic equipment also comprises: power management module, energy supply control module, K switch 1; Wherein: power management module comprises power supply input pin, power supply output pin and control signal input pin; Described power supply input pin and the coupling of described power port; Described power management module is used for receiving for plugged or after being used for the power management control signal of plugged and deenergization at its control signal input pin, by its power supply output pin output or stop out-put supply; Energy supply control module comprises power supply input pin, IO pin; Described power supply input pin is for the power supply of the power supply output pin output that receives described power management module; Described IO pin is used for exporting above-mentioned power management control signal to the control signal input pin of described power management module; K switch 1, one end and the coupling of described power port, the control signal input pin coupling of the other end and described power management module is used for exporting the power management control signal that is used for plugged to described control signal input pin when it is closed; Described K switch 1 is latch switch not.
In addition, described electronic equipment also comprises: capacitor C 1; One end of described capacitor C 1 and the coupling of described power port, the control signal input pin coupling of the other end and described power management module.
In addition, also comprise in the described electronic equipment: resistance R 1 and resistance R 2; Described resistance R 1 is connected between the control signal input pin of the IO pin of described energy supply control module and described power management module; Described resistance R 2 is connected between described K switch 1 and the described control signal input pin.
In addition, after described energy supply control module powers on, the power management control signal that also is used for plugged by described IO pin to the output of the control signal input pin of described power management module is with the power supply output of the power supply output pin of keeping described power management module.
In addition, also comprise in the described electronic equipment: resistance R 1 and resistance R 2; Described resistance R 1 and resistance R 2 are connected between the control signal input pin and capacitor C 1 of the IO pin of described energy supply control module and described power management module; Described resistance R 2 is connected between described K switch 1 and described control signal input pin and the capacitor C 1; Described IO pin is external pull down resistor R4 also; Described energy supply control module is carrying out T that single keys presses detects in second, stop by the described power management control signal for plugged of its IO pin output, the level of the signal by detecting its IO pin input is just judged the on off operating mode of described K switch 1: when the voltage of the signal of IO pin input judges that K switch 1 is in closure state during more than or equal to Vhigh; When being less than or equal to Vlow, the voltage of the signal of IO pin input judges that K switch 1 is in off-state; The capacitance C1 of capacitor C1 satisfies: C1 * (R1+R2+R4)〉T; Wherein, R1, R2 and R4 represent respectively the resistance of resistance R 1, R2 and R4;
And satisfy Vhigh〉Vlow; Wherein, R3 is the resistance between K switch 1 and the power port, R3 〉=0; Vin is the input voltage value of the power supply input pin of power management module, and Vout is the output voltage values of the power supply output pin of power management module.
In addition, also comprise in the described electronic equipment: resistance R 1 and resistance R 2; Described resistance R 1 and resistance R 2 are connected between the control signal input pin and capacitor C 1 of the IO pin of described energy supply control module and described power management module; Described resistance R 2 is connected between described K switch 1 and described control signal input pin and the capacitor C 1; Described energy supply control module also is built-in with the pull down resistor R4 with described IO pin coupling; Described energy supply control module is carrying out T that single keys presses detects in second, stop by the described power management control signal for plugged of its IO pin output, the level of the signal by detecting its IO pin input is just judged the on off operating mode of described K switch 1: when the voltage of the signal of IO pin input judges that K switch 1 is in closure state during more than or equal to Vhigh; When being less than or equal to Vlow, the voltage of the signal of IO pin input judges that K switch 1 is in off-state; The capacitance C1 of capacitor C1 satisfies: C1 * (R1+R2+R4)〉T; Wherein, R1, R2 and R4 represent respectively the resistance of resistance R 1, R2 and R4;
And satisfy Vhigh〉Vlow; Wherein, R3 is the resistance between K switch 1 and the power port, R3 〉=0; Vin is the input voltage value of the power supply input pin of power management module, and Vout is the output voltage values of the power supply output pin of power management module.
In addition, also comprise in the described electronic equipment: resistance R 1 and resistance R 2; Described resistance R 1 and resistance R 2 are connected between the control signal input pin and capacitor C 1 of the IO pin of described energy supply control module and described power management module; Described resistance R 2 is connected between described K switch 1 and described control signal input pin and the capacitor C 1; Described energy supply control module also comprises the auxiliary pin of key scan; The auxiliary pin of described key scan and described IO pin are coupled by resistance R 4 outside described energy supply control module; Described energy supply control module is carrying out T that single keys presses detects in second, stop by the described power management control signal for plugged of its IO pin output, the level that is less than or equal to Vl by the auxiliary pin output voltage values of its key scan, and the level of the signal by detecting its IO pin input is just judged the on off operating mode of described K switch 1: when the voltage of the signal of IO pin input judges that K switch 1 is in closure state during more than or equal to Vhigh; When being less than or equal to Vlow, the voltage of the signal of IO pin input judges that K switch 1 is in off-state; The capacitance C1 of capacitor C1 satisfies: C1 * (R1+R2+R4)〉T; Wherein, R1, R2 and R4 represent respectively the resistance of resistance R 1, R2 and R4;
Vlow=Vl; And satisfy Vhigh〉Vlow; Wherein, R3 is the resistance between K switch 1 and the power port, R3 〉=0; Vin is the input voltage value of the power supply input pin of power management module.
In addition, resistance R1, R2, R3 and R4 satisfy following relation: (R1+R2) 〉=and 10 * R4; And (R1+R3)≤0.5 * R4.
In addition, R1=15K ohm; R2=330K ohm; R3=1.5K ohm or R3=0 ohm; R4=33K ohm.
In addition, described power port is the VBUS pin of USB interface.
In addition, described power management module is low pressure difference linear voltage regulator.
In addition, described energy supply control module is processor.
In addition, described power management control signal for plugged is the level that voltage is greater than or equal to 2.2V; Described power management control signal for deenergization is the level that voltage is less than or equal to 0.7V.
The present invention on the other hand embodiment provides a kind of electric power management circuit, comprises power management module; Also comprise in this electric power management circuit: energy supply control module, K switch 1; Wherein: power management module comprises power supply input pin, power supply output pin and control signal input pin; Described power supply input pin and the power port coupling that is used for providing power supply; Described power management module is used for receiving for plugged or after being used for the power management control signal of plugged and deenergization at its control signal input pin, by its power supply output pin output or stop out-put supply; Energy supply control module comprises power supply input pin, IO pin; Described power supply input pin is for the power supply of the power supply input pin output that receives described power management module; Described IO pin is used for exporting above-mentioned power management control signal to the control signal input pin of described power management module; K switch 1, one end and the coupling of described power port, the control signal input pin coupling of the other end and described power management module is used for exporting the power management control signal that is used for plugged to described control signal input pin when it is closed; Described K switch 1 is latch switch not.
In addition, also comprise in the described electric power management circuit: capacitor C 1; One end of described capacitor C 1 and the coupling of described power port, the control signal input pin coupling of the other end and described power management module.
In addition, also comprise in the described electric power management circuit: resistance R 1 and resistance R 2; Described resistance R 1 is connected between the control signal input pin of the IO pin of described energy supply control module and described power management module; Described resistance R 2 is connected between described K switch 1 and the described control signal input pin.
In addition, after described energy supply control module powers on, the power management control signal that also is used for plugged by described IO pin to the output of the control signal input pin of described power management module is with the power supply output of the power supply output pin of keeping described power management module.
In addition, described power management module is low pressure difference linear voltage regulator.
In addition, described energy supply control module is processor.
In addition, described power management control signal for plugged is the level that voltage is greater than or equal to 2.2V; Described power management control signal for deenergization is the level that voltage is less than or equal to 0.7V.
In sum, adopt electric power management circuit of the present invention and corresponding electronic equipment, can use latch switch not (user unclamps the switch of automatic shutoff circuit behind the button) to the electronic equipment operation of starting shooting, when adopting this switch as starting key, can carry out power-off operation by transmitted signal under given conditions after the electronic equipment start, electronic equipment does not consume electric energy after the shutdown, has saved the power consumption of electronic equipment.
In addition, if in electric power management circuit, increase the electric capacity shown in each embodiment, can realize Auto Power On after the power port of electronic equipment powers on the one hand, need not the user and press starting key; On the other hand, when being used in conjunction with the resistance shown in each embodiment, can also realize carrying out multiplexing to starting key, namely under open state, the user can carry out input information by starting key, has saved the cost of electronic equipment, has reduced the volume of electronic equipment.
Description of drawings
In order to be illustrated more clearly in the technical scheme of the embodiment of the invention, the accompanying drawing of required use was done to introduce simply during the below will describe embodiment, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite of not paying creative work, can also obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 is the structural representation that the present invention comprises electronic equipment first embodiment of electric power management circuit;
Fig. 2 is the structural representation that the present invention comprises electronic equipment second embodiment of electric power management circuit;
Fig. 3 is the structural representation that the present invention comprises electronic equipment the 3rd embodiment of electric power management circuit.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on embodiments of the invention, those of ordinary skills belong to protection scope of the present invention not making the every other embodiment that obtains under the creative work prerequisite.
In description of the invention, it will be appreciated that, term " " center "; " vertically "; " laterally "; " on "; D score; " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", orientation or the position relationship of indications such as " outward " are based on orientation shown in the drawings or position relationship, only be for convenience of description the present invention and simplified characterization, rather than device or the element of indication or hint indication must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as limitation of the present invention.In addition, term " first ", " second " only are used for describing purpose, and can not be interpreted as indication or hint relative importance or quantity or position.
In description of the invention, need to prove, unless clear and definite regulation and restriction are arranged in addition, term " installation ", " linking to each other ", " connection " should be done broad understanding, for example, can be to be fixedly connected with, and also can be to removably connect, or connect integratedly; Can be mechanical connection, also can be to be electrically connected; Can be directly to link to each other, also can indirectly link to each other by intermediary, can be the connection of two element internals.For the ordinary skill in the art, can concrete condition understand above-mentioned term concrete meaning in the present invention.
Below in conjunction with accompanying drawing the embodiment of the invention is described in further detail.
Embodiment 1
Fig. 1 is the structural representation that the present invention comprises electronic equipment first embodiment of electric power management circuit; As shown in Figure 1, this electronic equipment comprises: power port, power management module, energy supply control module, capacitor C1, K switch 1; In addition, can also comprise resistance R 1～R4 in this electronic equipment; Wherein:
Power port is used for out-put supply, and for example, power port can be the VBUS pin of USB interface, output 5V power supply.
Power management module with power port coupling, and after receiving the power management control signal, according to the power management control signal, is exported or is stopped out-put supply.
What deserves to be explained is, coupling comprises direct connection and indirect joint (comprising that coupling links to each other), the both sides that directly are connected to connection directly contact, indirect joint is included under the prerequisite of the know-why that does not affect the technical program, connect and pass through other devices or circuit indirect joint between the both sides, as connecting by devices such as wire, resistance, comprising that perhaps coupling links to each other, coupling links to each other and refers to that both sides do not have connection physically, but has each other coupled relation.
Power management module comprises: power supply input pin (Vin as shown in Figure 1), power supply output pin (Vout as shown in Figure 1), control signal input pin (Ven as shown in Figure 1).
The power supply input pin of power management module and power port coupling are used for receiving the power supply that power port is exported.
The power supply output pin of power management module and each the functional module coupling in the electronic equipment are used for to each functional module out-put supply.Among the embodiment shown in Figure 1, the power supply output pin of power management module and energy supply control module coupling are this functional module out-put supply.Certainly, the power supply output pin can also be coupled with other functional module of electronic equipment, is its out-put supply.
The control signal input pin of power management module be used for to receive the power management control signal, and according to the power management control signal that receives by the power supply output pin out-put supply of power management module or stop out-put supply.
In the present embodiment, power management module can be the LDO(low pressure difference linear voltage regulator).
Energy supply control module is used for by the control signal input pin out-put supply supervisory control signals of its IO pin to power management module;
In the present embodiment, energy supply control module is used for the power management control signal (hereinafter referred to as power off signal) of deenergization by the output of IO pin, to stop the power supply output of power management module.
In the present embodiment, with low level signal (for example, voltage is lower than the signal of 0.7V) as power off signal.
In the present embodiment, energy supply control module is the processor in the electronic equipment, and this processor also comprises the power supply input pin, is used for receiving the power supply of power management module output.
The end of capacitor C1 and power port coupling, the control signal input pin coupling of the other end and power management module, when moment that power port begins to power (is the moment that power port powers on, for example, when electronic equipment is connected external power supply, or the USB plug of electronic equipment is when inserting USB socket), one end of the control signal input pin coupling of capacitor C1 and power management module (for example forms high level, voltage is higher than the signal of 0.7V), power management module with the high level of its control signal input pin input as power on signal, begin by its power supply output pin out-put supply, be the operation of the power supply of each functional module after finishing electronic equipment and powering on.
One end of K switch 1 and power port coupling, the control signal input pin coupling of the other end and power management module, after power port powers on, the moment that K switch 1 becomes closure state by off-state (for example, the user presses the moment of K switch 1), the control signal input pin of power port and power management module is in connected state, the control signal input pin of power management module receives high level, power management module with the high level of its control signal input pin input as power on signal, begin by its power supply output pin out-put supply, finish electronic equipment and be the processing of the power supply of each functional module.
In the present embodiment, K switch 1 is pushbutton switch open in usual.
Because power management module is LDO in the present embodiment, generally, if wishing LDO continues by its power supply output pin out-put supply, need to continue input high level (being power on signal) at the control signal input pin of LDO, therefore, in the present embodiment, the IO pin of energy supply control module and the coupling of the control signal input pin of power management module, also be used for after energy supply control module powers on by the control signal input pin lasting output high level (be power on signal) of its IO pin to LDO, in this case, the IO pin of energy supply control module stops to export high level and then is equivalent to send low level signal (being power off signal).
In addition, in the present embodiment, all right resistance in series R1 and R2 between the IO pin of energy supply control module and the control signal input pin of power management module; Wherein, R2 is connected between the control signal input pin of K switch 1 and power management module.
The resistance of R1 can be 15K ohm, the voltage damage energy supply control module of power port output when being used for preventing K switch 1 closure.
The resistance of R2 can be 330K ohm, the voltage damage power management module of power port output when being used for preventing K switch 1 closure.
In addition, can be by resistance R 3 couplings between K switch 1 and the power port.The resistance of R3 can be 1.5K ohm.
In order when electronic equipment/energy supply control module powers on, to use K switch 1, need to realize the on off operating mode of detector switch K1 when electronic equipment/energy supply control module powers on, namely switch K1 is scanned, therefore in the present embodiment, at the external pull down resistor R4 of the IO of energy supply control module pin, be the IO pin coupling of an end and the energy supply control module of resistance R 4, other end ground connection.In the present embodiment, the resistance of resistance R 4 is 33K ohm.
When energy supply control module/processor carries out key scan, stop to export high level (being power on signal), enter the key scan state; At this moment, capacitor C 1 is to the control signal input pin output high level of power management module, to keep the power supply output of power management module (LDO).After energy supply control module/processor is finished key scan, again export high level signal (being power on signal).
When ensureing that energy supply control module/processor carries out key scan, capacitor C 1 is to the control signal input pin output high level of power management module, and to keep the power supply output of LDO, in the present embodiment, the capacitance C1 of capacitor C1 need satisfy:
C1×（R1+R2+R4）>T；
Wherein, R1, R2 and R4 represent respectively the resistance of resistance R 1, R2 and R4; T is single keys presses scanning required time, and T can be 0.01 second (being 10ms) usually.
Energy supply control module/processor is set to input state at the key scan state with the IO pin, judges K switch 1 current off-state or the closure state of being in by the incoming level of judging the IO pin.Specifically, when the incoming level of IO pin is high level (being generally the level that voltage is higher than 2V), judge the K switch 1 current closure state that is in, when the incoming level of IO pin is low level (being generally the level that voltage is lower than 0.7V), judge the K switch 1 current off-state that is in.
In the present embodiment, when K switch 1 was in closure state, the level voltage of the IO of energy supply control module input was roughly:
When K switch 1 was in off-state, the level voltage of the IO of energy supply control module input was roughly:
Wherein, Above-mentioned Vin represents the input voltage of power management module, and Vout represents the output voltage of power management module; R1, R2, R3 and R4 represent respectively the resistance of resistance R 1, R2, R3 and R4.
Embodiment 2
Fig. 2 is the structural representation that the present invention comprises electronic equipment second embodiment of electric power management circuit; As shown in Figure 2, second embodiment of the invention is compared with the first embodiment, and difference only is: pull down resistor external among the first embodiment is become the built-in pull down resistor of energy supply control module (processor).
Embodiment 3
Fig. 3 is the structural representation that the present invention comprises electronic equipment the 3rd embodiment of electric power management circuit; As shown in Figure 3, third embodiment of the invention is compared with the first embodiment, and difference is:
One end of resistance R 4 and the coupling of the IO pin of energy supply control module, the output pin of the other end and energy supply control module (can be called the auxiliary pin of key scan) coupling.
When energy supply control module/processor carries out key scan, when entering the key scan state, except its IO pin is set to the input state, also assist pin output low level (for example, voltage is less than or equal to the level of 0.3V) by key scan.
In the present embodiment, suppose the level of the auxiliary pin output of key scan Vl=0.3V; When K switch 1 was in closure state, the level voltage of the IO of energy supply control module input was roughly:
When K switch 1 was in off-state, the level voltage of the IO of energy supply control module input was roughly:
Vlow＝=Vl=0.3V。
Wherein, Vin represents the magnitude of voltage of power management module power supply input pin.
According to ultimate principle of the present invention, can also carry out multiple conversion to above-described embodiment, for example:
(1) in order to carry out key scan, the value that the resistance R1 of resistance R 1, R2, R3 and R4, R2, R3 and R4 enumerate in above-described embodiment, can also be other value that satisfies following condition:
For the first embodiment and the second embodiment, each resistance value satisfies:
Wherein, Vin is the input voltage value of the power supply input pin of power management module, and Vout is the output voltage values of the power supply output pin of power management module.
For the 3rd embodiment, each resistance value satisfies:
Wherein, Vl is the magnitude of voltage of the auxiliary pin output level of key scan.
(2) further, carry out key scan in order to be more convenient for, the value that the resistance R1 of resistance R 1, R2, R3 and R4, R2, R3 and R4 enumerate in above-described embodiment, can also be other value that satisfies following condition:
(R1+R2) 〉=10 * R4; And (R1+R3)≤0.5 * R4.
Resistance R 3 can be omitted, i.e. R3=0.
(3) in the above embodiment of the present invention, capacitor C 1 plays two effects in electronic product:
1) need not to press K switch 1 after power port powers on and directly to enter open state, for example, after electronic equipment of the present invention inserts the USB slot, the VBUS pin of USB interface is as the power port powered on moment, capacitor C 1 is to the control signal input pin output high level of power management module, and power management module namely begins to power to functional modules such as energy supply control modules (processor);
2) energy supply control module (processor) enters the key scan state, when stopping to export high level (power on signal), capacitor C 1 continues the control signal input pin output high level to power management module within its discharge time, to keep the power supply of power management module in the key scan process.
In other embodiments of the invention, if need not multiplexing starting key (being K switch 1) in the electronic product, namely need not to carry out key scan, and electronic product need not to realize the power port rear open state that directly enters that powers on, then can omit capacitor C 1.
In sum, adopt electric power management circuit of the present invention and corresponding electronic equipment, can use latch switch not (user unclamps the switch of automatic shutoff circuit behind the button) to the electronic equipment operation of starting shooting, when adopting this switch as starting key, can carry out power-off operation by transmitted signal under given conditions after the electronic equipment start, electronic equipment does not consume electric energy after the shutdown, has saved the power consumption of electronic equipment.
In addition, if in electric power management circuit, increase the electric capacity shown in each embodiment, can realize Auto Power On after the power port of electronic equipment powers on the one hand, need not the user and press starting key; On the other hand, when being used in conjunction with the resistance shown in each embodiment, can also realize carrying out multiplexing to starting key, namely under open state, the user can carry out input information by starting key, has saved the cost of electronic equipment, has reduced the volume of electronic equipment.
In the description of this instructions, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present invention or the example in conjunction with specific features, structure, material or the characteristics of this embodiment or example description.In this manual, the schematic statement of above-mentioned term not necessarily referred to identical embodiment or example.And the specific features of description, structure, material or characteristics can be with suitable mode combinations in any one or more embodiment or example.
Although illustrated and described embodiments of the invention, those having ordinary skill in the art will appreciate that: in the situation that do not break away from principle of the present invention and aim can be carried out multiple variation, modification, replacement and modification to these embodiment, scope of the present invention is by claim and be equal to and limit.
Claims (20)
1. an electronic equipment comprises for the power port that power supply is provided to described electronic equipment; It is characterized in that, this electronic equipment also comprises: power management module, energy supply control module, K switch 1; Wherein:
Power management module comprises power supply input pin, power supply output pin and control signal input pin; Described power supply input pin and the coupling of described power port; Described power management module is used for receiving for plugged or after being used for the power management control signal of plugged and deenergization at its control signal input pin, by its power supply output pin output or stop out-put supply;
Energy supply control module comprises power supply input pin, IO pin; Described power supply input pin is for the power supply of the power supply output pin output that receives described power management module; Described IO pin is used for exporting above-mentioned power management control signal to the control signal input pin of described power management module;
K switch 1, one end and the coupling of described power port, the control signal input pin coupling of the other end and described power management module is used for exporting the power management control signal that is used for plugged to described control signal input pin when it is closed;
Described K switch 1 is latch switch not.
2. electronic equipment as claimed in claim 1 is characterized in that,
Described electronic equipment also comprises: capacitor C 1;
One end of described capacitor C 1 and the coupling of described power port, the control signal input pin coupling of the other end and described power management module.
3. electronic equipment as claimed in claim 1 or 2 is characterized in that,
Also comprise in the described electronic equipment: resistance R 1 and resistance R 2;
Described resistance R 1 is connected between the control signal input pin of the IO pin of described energy supply control module and described power management module;
Described resistance R 2 is connected between described K switch 1 and the described control signal input pin.
4. electronic equipment as claimed in claim 1 or 2 is characterized in that,
After described energy supply control module powers on, also be used for the power management control signal of plugged to the output of the control signal input pin of described power management module by described IO pin, with the power supply output of the power supply output pin of keeping described power management module.
5. electronic equipment as claimed in claim 4 is characterized in that,
Also comprise in the described electronic equipment: resistance R 1 and resistance R 2;
Described resistance R 1 and resistance R 2 are connected between the control signal input pin and capacitor C 1 of the IO pin of described energy supply control module and described power management module; Described resistance R 2 is connected between described K switch 1 and described control signal input pin and the capacitor C 1;
Described IO pin is external pull down resistor R4 also;
Described energy supply control module is carrying out T that single keys presses detects in second, stop by the described power management control signal for plugged of its IO pin output, the level of the signal by detecting its IO pin input is just judged the on off operating mode of described K switch 1: when the voltage of the signal of IO pin input more than or equal to V
HighThe time judge that K switch 1 is in closure state; When the voltage of the signal of IO pin input is less than or equal to V
LowThe time judge that K switch 1 is in off-state;
The capacitance C of capacitor C1
1Satisfy: C
1* (R
1+ R
2+ R
4) T; Wherein, R
1, R
2, and R
4The resistance that represents respectively resistance R 1, R2 and R4;
Wherein, R
3Be the resistance between K switch 1 and the power port, R
3〉=0; V
InBe the input voltage value of the power supply input pin of power management module, V
OutOutput voltage values for the power supply output pin of power management module.
6. electronic equipment as claimed in claim 4 is characterized in that,
Also comprise in the described electronic equipment: resistance R 1 and resistance R 2;
Described resistance R 1 and resistance R 2 are connected between the control signal input pin and capacitor C 1 of the IO pin of described energy supply control module and described power management module; Described resistance R 2 is connected between described K switch 1 and described control signal input pin and the capacitor C 1;
Described energy supply control module also is built-in with the pull down resistor R4 with described IO pin coupling;
Described energy supply control module is carrying out T that single keys presses detects in second, stop by the described power management control signal for plugged of its IO pin output, the level of the signal by detecting its IO pin input is just judged the on off operating mode of described K switch 1: when the voltage of the signal of IO pin input more than or equal to V
HighThe time judge that K switch 1 is in closure state; When the voltage of the signal of IO pin input is less than or equal to V
LowThe time judge that K switch 1 is in off-state;
The capacitance C of capacitor C1
1Satisfy: C
1* (R
1+ R
2+ R
4) T; Wherein, R
1, R
2, and R
4The resistance that represents respectively resistance R 1, R2 and R4;
Wherein, R
3Be the resistance between K switch 1 and the power port, R
3〉=0; V
InBe the input voltage value of the power supply input pin of power management module, V
OutOutput voltage values for the power supply output pin of power management module.
7. electronic equipment as claimed in claim 4 is characterized in that,
Also comprise in the described electronic equipment: resistance R 1 and resistance R 2;
Described resistance R 1 and resistance R 2 are connected between the control signal input pin and capacitor C 1 of the IO pin of described energy supply control module and described power management module; Described resistance R 2 is connected between described K switch 1 and described control signal input pin and the capacitor C 1;
Described energy supply control module also comprises the auxiliary pin of key scan; The auxiliary pin of described key scan and described IO pin are coupled by resistance R 4 outside described energy supply control module;
Described energy supply control module, stops to be less than or equal to V by the described power management control signal for plugged of its IO pin output by the auxiliary pin output voltage values of its key scan in second at the T that carries out the single keys presses detection
lLevel, and the level of the signal by detecting the input of its IO pin is just judged the on off operating mode of described K switch 1: when the voltage of the signal of IO pin input more than or equal to V
HighThe time judge that K switch 1 is in closure state; When the voltage of the signal of IO pin input is less than or equal to V
LowThe time judge that K switch 1 is in off-state;
The capacitance C of capacitor C1
1Satisfy: C
1* (R
1+ R
2+ R
4) T; Wherein, R
1, R
2, and R
4The resistance that represents respectively resistance R 1, R2 and R4;
Wherein, R
3Be the resistance between K switch 1 and the power port, R
3〉=0; V
InInput voltage value for the power supply input pin of power management module.
8. such as the described electronic equipment of arbitrary claim in the claim 5 to 7, it is characterized in that,
Resistance R
1, R
2, R
3And R
4Satisfy following relation:
(R
1+ R
2) 〉=10 * R
4And (R
1+ R
3)≤0.5 * R
4
9. electronic equipment as claimed in claim 8 is characterized in that,
R
1=15K ohm; R
2=330K ohm; R
3=1.5K ohm or R
3=0 ohm; R
4=33K ohm.
10. electronic equipment as claimed in claim 1 is characterized in that,
Described power port is the VBUS pin of USB interface.
11. electronic equipment as claimed in claim 1 is characterized in that,
Described power management module is low pressure difference linear voltage regulator.
12. electronic equipment as claimed in claim 1 is characterized in that,
Described energy supply control module is processor.
13. electronic equipment as claimed in claim 1 is characterized in that,
Described power management control signal for plugged is the level that voltage is greater than or equal to 2.2V;
Described power management control signal for deenergization is the level that voltage is less than or equal to 0.7V.
14. an electric power management circuit comprises power management module; It is characterized in that, also comprise in this electric power management circuit: energy supply control module, K switch 1; Wherein:
Power management module comprises power supply input pin, power supply output pin and control signal input pin; Described power supply input pin and the power port coupling that is used for providing power supply; Described power management module is used for receiving for plugged or after being used for the power management control signal of plugged and deenergization at its control signal input pin, by its power supply output pin output or stop out-put supply;
Energy supply control module comprises power supply input pin, IO pin; Described power supply input pin is for the power supply of the power supply input pin output that receives described power management module; Described IO pin is used for exporting above-mentioned power management control signal to the control signal input pin of described power management module;
K switch 1, one end and the coupling of described power port, the control signal input pin coupling of the other end and described power management module is used for exporting the power management control signal that is used for plugged to described control signal input pin when it is closed;
Described K switch 1 is latch switch not.
15. electric power management circuit as claimed in claim 14 is characterized in that,
Also comprise in the described electric power management circuit: capacitor C 1;
One end of described capacitor C 1 and the coupling of described power port, the control signal input pin coupling of the other end and described power management module.
16. such as the described electric power management circuit of claims 14 or 15, it is characterized in that,
Also comprise in the described electric power management circuit: resistance R 1 and resistance R 2;
Described resistance R 1 is connected between the control signal input pin of the IO pin of described energy supply control module and described power management module;
Described resistance R 2 is connected between described K switch 1 and the described control signal input pin.
17. such as the described electric power management circuit of claims 14 or 15, it is characterized in that,
After described energy supply control module powers on, also be used for the power management control signal of plugged to the output of the control signal input pin of described power management module by described IO pin, with the power supply output of the power supply output pin of keeping described power management module.
18. electric power management circuit as claimed in claim 14 is characterized in that,
Described power management module is low pressure difference linear voltage regulator.
19. electric power management circuit as claimed in claim 14 is characterized in that,
Described energy supply control module is processor.
20. electric power management circuit as claimed in claim 14 is characterized in that,
Described power management control signal for plugged is the level that voltage is greater than or equal to 2.2V;
Described power management control signal for deenergization is the level that voltage is less than or equal to 0.7V.
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| CN201210290862.3A CN102854966B (en) | 2012-08-15 | 2012-08-15 | A kind of electronic equipment, electric power management circuit |
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| CN102854966B (en) | 2015-10-28 |
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Address after: 100083 Beijing, Haidian District Road, No. 38, B block, 1810 Applicant after: Tendyron Technology Co., Ltd. Address before: 100083, B, block 17, golden building, No. 1810 Qinghua East Road, Beijing, Haidian District Applicant before: Tendyron Technology Co., Ltd. |
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