CN103944233A - Device for supplying power through battery and power supply method of device - Google Patents
Device for supplying power through battery and power supply method of device Download PDFInfo
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Abstract
The invention provides a device for supplying power through a battery and a power supply method of the device. The device comprises a control circuit, a direct current/direct current conversion circuit and a power utilization circuit, wherein the control circuit is used for detecting an input signal and generating a control signal used for instructing the work state of the device based on the input signal; an input port of the direct current/direct current conversion circuit is used for being connected with a positive electrode and a negative electrode of the battery, the direct current/direct current conversion circuit receives the control signal and converts the input voltage of the input port into the output voltage, responds to the control signal and instructs the device to be in the non-standby state, so that the voltage value of the output voltage generated by the direct current/direct current conversion circuit is a first voltage; the direct current/direct current conversion circuit responds to the control signal and instructs the device to be in the standby state, so that the voltage value of the output voltage generated by the direct current/direct current conversion circuit is a second voltage different from the first voltage; the power utilization circuit is connected with an output port of the direct current/direct current conversion circuit so as to receive the output voltage. The battery capacity can be fully used by the device, so that use cost is reduced, and a constant supply current is maintained.
Description
Technical field
The present invention relates to make battery-powered device and method of supplying power to thereof, relate in particular to a kind of energy saving and environment friendly, make battery-powered low-power device and method of supplying power to thereof.
Background technology
Consider the factors such as portable, easy, some lower powered electronic equipments adopt powered battery conventionally, as electronic thermometer, electrosphygmomanometer, remote controller etc.Battery can be rechargeable battery (as lithium battery) or dry cell etc.How efficient and make full use of the capacity of battery the common requirement of above-mentioned application be, improves the battery powered duration.
Taking the remote controller of household electrical appliances as example, the man-machine interface circuit that it is inner and signal sending circuit all need power supply.In above-mentioned signal sending circuit, conventionally utilize infrared transmitting tube to carry out signal transmission by infrared ray, the cut-in voltage of common infrared transmitting tube is all between 1.7～2V.In the time adopting dry cell power supply, single-unit dry cell undertension, to provide signal circuit the normal requirement sending, therefore need to adopt two joint dry cell series-feds conventionally.Because cell voltage is relevant with its discharge capacity, single-unit dry cell terminal voltage in the time of full capacity can reach 1.5V, and electric discharge end stage (stage of running down of battery in other words), it is even lower that terminal voltage will drop to 0.8V.Therefore,, in the incipient stage, because battery terminal voltage is higher, after two batteries series connection, supply power voltage can reach 3V, causes the transmitting power of signal sending circuit larger, even radiating circuit is caused to damage.The property class of infrared transmitting tube (IR LED) is similar to diode, in the time that supply power voltage exceedes its cut-in voltage, its electric current increase sharply and voltage drop increase less.In order to limit the electric current of battery terminal voltage when higher, the current-limiting resistance of need to connecting while conventionally power supply to signal sending circuit.
But when battery terminal voltage declines and can not provide enough electric current to signal sending circuit, while causing battery terminal voltage to be low voltage, series limiting resistor can make signal circuit that enough transmitting powers can not be provided.
With reference to figure 1, Fig. 1 has provided a kind of block diagram of sender unit of typical traditional supply power mode.In system shown in Figure 1, after two joint dry cell 10 series connection, power to infrared transmitting tube LED and control circuit 11.One end of infrared transmitting tube LED is connected to one end of power supply (being also battery 10) by current-limiting resistance Rs, other one end of infrared transmitting tube LED is connected to the I/O end of control circuit 11.Control circuit 11 detects outside input signal, for example, can scan key-press input signal by key scanning circuit 111, and based on the key information detecting, generation transmits control signal.This transmits control signal for the turn-on and turn-off of control switch S1, thereby the break-make of controlling infrared transmitting tube LED is to launch specific signal.In the time input signal not detected, for example key scanning circuit 111 does not detect key-press input signal, and control circuit 11 does not produce and transmits control signal, and system is in holding state.Wherein, the Main Function of current-limiting resistance Rs is in the time that cell voltage is higher, and the electric current of infrared transmitting tube LED is flow through in restriction.In some applications, the current ratio that can flow through due to infrared transmitting tube LED is larger, also can there is no current-limiting resistance Rs.
Under the supply power mode shown in Fig. 1, when switch S 1 conducting in control circuit 11 sends to carry out signal, size of current and the supply power voltage of the infrared transmitting tube LED that flows through are proportional.The terminal voltage of battery 10 is higher, and electric current is larger, and the consumption of battery 10 is also just larger, thereby has shortened the life-span of battery 10.When the terminal voltage of battery 10 drops to certain numerical value (namely cut-ff voltage), the electric current that is not enough to provide enough, to infrared transmitting tube LED, causes the hydraulic performance decline of signal sending circuit, can not meet application demand.Conventionally, current-limiting resistance Rs is larger, and the discharge cut-off voltage of battery 10 is higher, and the capacity of battery 10 just more can not be fully utilized, and has not only increased use cost, is also unfavorable for energy-conserving and environment-protective.
Fig. 2 shows under Fig. 1 tradition supply power mode, the relation between the terminal voltage of single battery and the electric current of the infrared transmitting tube LED that flows through.In Fig. 2, abscissa is single battery voltage, and ordinate is the electric current of infrared transmitting tube LED of flowing through.For meeting the requirement of signal emissive porwer, the electric current of the infrared transmitting tube LED that conventionally flows through must be greater than default numerical value (being also minimum transmitting tube electric current).As can be seen from Figure 2,, under the current-limiting resistance of different resistances, in order to meet this minimum transmitting tube electric current, the cut-ff voltage of battery discharge increases along with the increase of current-limiting resistance, causes battery capacity not make full use of.And when cell voltage is higher, the electric current of the infrared transmitting tube of flowing through is excessive, cause battery discharge too fast and easily damage transmitting tube.While being 2 ohm as current-limiting resistance Rs, the cut-ff voltage of battery is 1.15V, causes battery to have quite a few capacity to be used.
Visible, traditional power supply circuits need two joint or multiple batteries series-feds, the problem that such supply power mode exists battery capacity not make full use of, thus cause the problems such as use cost increase, the wasting of resources and contaminated environment.
Therefore, need a kind of new power supply circuits and supply power mode, to make full use of the capacity of supplying cell, and further reduce the use cost of system.
Summary of the invention
The technical problem to be solved in the present invention is to provide one and makes battery-powered device and method of supplying power to thereof, can make full use of battery capacity, reduces use cost, maintains constant supply current.
For solving the problems of the technologies described above, the invention provides one and make battery-powered device, comprising:
Control circuit, for detection of input signal, and produces the control signal that is used to indicate this device operating state based on this input signal;
DC/DC conversion circuit, its input port is for connecting positive pole and the negative pole of battery, this DC/DC conversion circuit receives described control signal, the input voltage of described input port is converted to output voltage, indicating this device in response to described control signal is non-holding state, the magnitude of voltage of the output voltage that described DC/DC conversion circuit produces is the first voltage, indicating this device in response to described control signal is holding state, and the magnitude of voltage of the output voltage that described DC/DC conversion circuit produces is the second voltage that is different from this first voltage;
Power circuit, is connected to receive described output voltage with the output port of described DC/DC conversion circuit.
According to one embodiment of present invention, described power circuit is signal sending circuit, and this power circuit comprises transmitting tube, the first end of the output port of booster circuit described in its anodic bonding,
This control circuit has I/O end and ground end, and this I/O end connects the negative electrode of described transmitting tube, and this ground end connects the second end of described output port, and described control circuit comprises:
Switch, its first end connects described I/O end, and its second end connects to be held describedly;
Testing circuit, for detection of this input signal, in the time this input signal being detected, produce and transmit control signal, this transmit control signal transfer to described switch control end to control the turn-on and turn-off of described switch, described in not producing in the time described input signal not detected, transmit control signal.
According to one embodiment of present invention, described testing circuit also produces described control signal according to described input signal, in the time this input signal being detected described in control signal effective, in the time described input signal not detected described in control signal invalid;
Described DC/DC conversion circuit is subject to described control signal control, and in the time that described control signal is effective, the magnitude of voltage of described output voltage is described the first voltage, and in the time that described control signal is invalid, the magnitude of voltage of described output voltage is described second voltage.
According to one embodiment of present invention, described DC/DC conversion circuit is booster type DC/DC converter, step-down type dc/DC convertor or buck-boost type DC/DC converter.
According to one embodiment of present invention, described DC/DC conversion circuit comprises:
Inductance, its first end is for connecting the positive pole of described battery;
The first switching tube, its first end connects the second end of described inductance, and its second end is for connecting the negative pole of described battery, and its control end receives the first control signal;
Second switch pipe, its first end connects the second end of described inductance, and its control end receives the second control signal;
Output capacitance, its first end connects the second end of described second switch pipe, and its second end connects the second end of described the first switching tube;
The first feedback resistance, its first end connects the second end of described second switch pipe;
Output voltage feedback circuit, its input port connects first end and second end of described output capacitance, and the output voltage of this output voltage feedback circuit based on described output capacitance two ends obtains error signal;
PWM modulation circuit, its input connects the output of described output voltage feedback circuit to receive this error signal, and this PWM modulation circuit carries out pulse-width modulation to produce described the first control signal and the second control signal according to this error signal;
With door, its first input end connects the output of described PWM modulation circuit, and its second input receives described output control signal.
According to one embodiment of present invention, described output voltage feedback circuit comprises:
The first operational amplifier, its first input end connects the second end of described the first feedback resistance, and its second termination is received default reference voltage;
The second feedback resistance, its first end connects the second end of described output capacitance, and its second end connects the first input end of described the first operational amplifier;
The first electric capacity, its first end connects the first input end of described the first operational amplifier;
The first resistance, its first end connects the second end of described the first electric capacity, and its second end connects the output of described the first operational amplifier.
According to one embodiment of present invention, described DC/DC conversion circuit comprises:
Inductance, its first end is for connecting the positive pole of described battery;
The first switching tube, its first end connects the second end of described inductance, and its second end is for connecting the negative pole of described battery, and its control end receives the first control signal;
Second switch pipe, its first end connects the second end of described inductance, and its control end receives the second control signal, described the first control signal and the second control signal complementation;
Output capacitance, its first end connects the second end of described second switch pipe, and its second end connects the second end of described the first switching tube;
The first feedback resistance, its first end connects the second end of described second switch pipe;
Output voltage feedback circuit, its input port connects first end and second end of described output capacitance, and this output voltage feedback circuit output voltage based on described output capacitance two ends under the control of described output control signal obtains error signal;
PWM modulation circuit, its input connects the output of described output voltage feedback circuit to receive this error signal, and this PWM modulation circuit carries out pulse-width modulation to produce described the first control signal and the second control signal according to this error signal.
According to one embodiment of present invention, described output voltage feedback circuit comprises:
The first operational amplifier, its first input end connects the second end of described the first feedback resistance, and its second termination is received default reference voltage;
The second feedback resistance, its first end connects the second end of described output capacitance, and its second end connects the first input end of described the first operational amplifier;
Feedback switch, its first end connects the first end of described the second feedback resistance, and its control end receives described output control signal;
The 3rd feedback resistance, its first end connects the second end of described feedback switch, and its second end connects the second end of described the second feedback resistance;
The first electric capacity, its first end connects the first input end of described the first operational amplifier;
The first resistance, its first end connects the second end of described the first electric capacity, and its second end connects the output of described the first operational amplifier.
According to one embodiment of present invention, described PWM modulation circuit comprises: the second operational amplifier, and its first input end connects the output of described output voltage feedback circuit, and its second termination is received default pulse signal.
According to one embodiment of present invention, the input port of described DC/DC conversion circuit is for connecting positive pole and the negative pole of same battery.
According to one embodiment of present invention, described the first voltage is greater than described second voltage.
The present invention also provides a kind of method of supplying power to that makes battery-powered device, comprising:
Detect input signal, and produce based on this input signal the control signal that is used to indicate this device operating state;
Using DC/DC conversion circuit is output voltage according to this control signal by the voltage transitions at battery two ends, if it is non-holding state that described control signal is indicated this device, the magnitude of voltage of described output voltage is the first voltage, if it is holding state that described control signal is indicated this device, the magnitude of voltage of described output voltage is the second voltage that is different from this first voltage;
Described output voltage is transferred to power circuit, to give described power circuit power supply.
According to one embodiment of present invention, described the first voltage is greater than described second voltage.
Compared with prior art, the present invention has the following advantages:
The battery-powered device that makes of the embodiment of the present invention adopts DC/DC conversion circuit that input voltage is converted to stable output voltage, this output voltage does not change with the variation of input voltage, namely do not change with the variation of battery terminal voltage, thereby can make full use of the capacity of battery, and be conducive to improve the service behaviour of equipment.
In addition, in the battery-powered device of the embodiment of the present invention, DC/DC conversion circuit regulates the magnitude of voltage of this output voltage according to the control signal of indicating device operating state, if it is non-holding state that described control signal is indicated this device, the magnitude of voltage of described output voltage is the first relatively high voltage, to meet device requirements of one's work; If it is holding state that described control signal is indicated this device, the magnitude of voltage of described output voltage is relatively low second voltage, to reduce stand-by power consumption.
Furthermore, in the time that this device is remote controller, compare the mode that traditional employing two saves or more multiple batteries is powered, the technical scheme of the embodiment of the present invention can make full use of the capacity of battery, improves the cruising time of battery; And can obtain more stable signal strength signal intensity in the time transmitting, promote the performance of remote controller.
Brief description of the drawings
Fig. 1 is the power supply circuits schematic diagram of a kind of signal sending circuit in prior art;
Fig. 2 is the relation curve schematic diagram of single battery voltage and infrared emission tube current in power supply circuits shown in Fig. 1;
Fig. 3 is the electrical block diagram that makes battery-powered device of the embodiment of the present invention;
Fig. 4 is the work wave schematic diagram that makes battery-powered device shown in Fig. 3;
Fig. 5 is the electrical block diagram of a kind of voltage boosting dc/DC convertor that makes battery-powered device of the embodiment of the present invention;
Fig. 6 is the electrical block diagram of the another kind of voltage boosting dc/DC convertor that makes battery-powered device of the embodiment of the present invention;
Fig. 7 is the electrical block diagram of a kind of step-down DC-DC current transformer that makes battery-powered device of the embodiment of the present invention;
Fig. 8 is the electrical block diagram of the another kind of step-down DC-DC current transformer that makes battery-powered device of the embodiment of the present invention;
Fig. 9 be the embodiment of the present invention make the working waveform figure of battery-powered device in the time adopting step-down type dc/DC transfer circuit shown in Fig. 8;
Figure 10 is the electrical block diagram of a kind of buck-boost type DC/DC converter that makes battery-powered device of the embodiment of the present invention.
Embodiment
Below in conjunction with specific embodiments and the drawings, the invention will be further described, but should not limit the scope of the invention with this.
For solving problems of the prior art, a kind of execution mode is to adopt booster type DC/DC conversion circuit.With reference to figure 3, the battery-powered device that makes of the present embodiment comprises DC/DC conversion circuit 31 (also claiming DC/DC converter), control circuit 33 and the power circuit being connected with this DC/DC conversion circuit 31.Wherein, in the embodiment shown in fig. 3, DC/DC conversion circuit 31 is booster type DC/DC conversion circuit, these booster type DC/DC conversion circuit 31 input ports are for connecting positive pole and the negative pole of battery 30, this booster type DC/DC conversion circuit 31 is output voltage V o by the input voltage of input port (the namely voltage of battery 30) boost conversion, and this output voltage does not change with the variation of input voltage.
This control circuit 33 detects input signal, produces the control signal EN that is used to indicate device operating state based on this input signal.This DC/DC conversion circuit 31 produces the output voltage of relevant voltage value in response to this control signal EN.The magnitude of voltage of this output voltage V o is determined by the operating state of installing, at device, under non-holding state, the magnitude of voltage of output voltage V o is the first voltage, in the time installing in holding state, the magnitude of voltage of output voltage is second voltage, and this first voltage is greater than second voltage; Power circuit is connected to receive this output voltage V o with the output port of booster circuit 31.Wherein, holding state refers to device and does not temporarily carry out the function that its when design expection will realize, and is a kind of wait state; Non-holding state refers to other states beyond holding state, the function that for example, when device is being carried out design expection will realize.
As a preferred embodiment, the quantity of battery 30 is one, and namely the input port of booster circuit 31 is connected to positive pole and the negative pole of same battery.
In addition, as a preferred embodiment, this DC/DC conversion circuit 31 can be booster type (Boost) DC-DC (DC-DC) current transformer.Certainly, those skilled in the art are to be understood that, this DC/DC conversion circuit 31 also can adopt other forms of circuit to realize and boost, for example voltage-dropping type (Buck) DC/DC converter or buck-boost type (Buck-Boost) type DC/DC converter.
The device of the present embodiment is taking remote controller as example, and this power circuit can be signal sending circuit, specifically comprises: transmitting tube 32, the first end of the output port of its anodic bonding booster circuit 31.
This control circuit 33 has I/O end and ground end GND, and this I/O end connects the negative electrode of transmitting tube 32, and this ground end GND connects the second end of the output port of booster circuit 31.
Furthermore, this control circuit 33 comprises: switch S 1, and its first end connects I/O end, and its second end connects earth terminal GND; Testing circuit 331, for detection of input signal, in the time this input signal being detected, produce and transmit control signal, this control end of transferring to switch S 1 of transmitting control signal, with the turn-on and turn-off of control switch S1, does not produce and transmits control signal in the time input signal not detected.
In the present embodiment, this testing circuit 331 is key scanning circuit, for detection of the push button signalling of outside input, in the time key-press input signal being detected, generation transmits control signal, with control switch S1 turn-on and turn-off, in the time key-press input signal not detected, do not produce this and transmit control signal.
In addition, as a preferred embodiment, this testing circuit 331 also produces control signal EN according to input signal, and in the time this input signal being detected, EN is effective for this control signal, for example, can be high level; In the time input signal not detected, control signal EN is invalid, for example, can be low level.DC/DC conversion circuit 31 is controlled by this control signal EN, in the time that control signal EN is effective, the magnitude of voltage of the output voltage V o that DC/DC conversion circuit 31 produces is the first voltage, in the time that output control signal EN is invalid, the magnitude of voltage of the output voltage V o that DC/DC conversion circuit 31 produces is second voltage, and this first voltage is greater than second voltage.For example, for signal sending circuit, the magnitude of voltage of this first voltage can be the optimal value meeting under transmitting tube 32 power requirements; And the magnitude of voltage of this second voltage can be lower than the first voltage, can be for example cell voltage, the primary voltage before namely boosting.
Furthermore, if control circuit 33 receives input signal (as push button signalling), show now to need transmitted signal, within this time period, the control signal EN that control circuit 33 produces is effective, for example, be high level, and the output voltage V o that makes this step-up DC-DC current transformer 31 is relatively high voltage, thereby the electric current of the transmitting tube 32 that makes to flow through reaches set point, this set point can be to meet the minimum current that emissive porwer requires; Meanwhile, control circuit 32 is realized the transmission of signal by the turn-on and turn-off of control switch S1.
And in the time input signal not detected, namely in the time that no signal sends, control circuit 33 control switch S1 turn-off, make the no current transmitting tube 32 of flowing through; Meanwhile, the control signal EN that control circuit 33 produces is invalid, for example, be low level, and the output voltage that makes step-up DC-DC current transformer 31 is relatively low voltage, to reduce system power dissipation.
As above, during signal sends, above-mentioned step-up DC-DC current transformer 31 is exported a relatively high voltage, meets the demand of transmitting tube to power supply; During no signal sends, above-mentioned step-up DC-DC current transformer 31 is exported a relatively low voltage, the demand of low-power consumption while meeting system standby.Output control signal EN has two states (effectively with invalid), and different states produces the output voltage V o of different magnitudes of voltage for controlling booster type DC/DC converter 31.
Fig. 4 is the work wave schematic diagram of Fig. 3 shown device, and within the t0-t1 time period, without transmitted signal, the control signal EN that control circuit 33 produces is low level signal, and the output voltage V o that step-up DC-DC current transformer 31 produces is lower voltage V2; In the t1-t2 stage, control circuit 33 detects input signal, need transmitted signal, at this one-phase, the output control signal EN that control circuit 33 produces is high level signal, the output voltage V o that step-up DC-DC current transformer 31 produces is higher voltage V1, the electric current of transmitting tube 32 of making to flow through meets sets requirement, meet the requirements of emissive porwer, in the t1-t2 stage, control circuit 33, by the turn-on and turn-off of control switch S1, with certain frequency and duty ratio, makes the agreement outside transmitted signal of transmitting tube 32 with agreement.
With reference to figure 5, Fig. 5 shows a kind of physical circuit of step-up DC-DC current transformer, comprising: inductance L, and its first end is for connecting the positive pole of battery; The first switching tube Q1, its first end connects the second end of inductance L, and its second end is for connecting the negative pole of battery, and its control end receives the first control signal Vgs1; Second switch pipe Q2, its first end connects the second end of inductance L, and its control end receives the second control signal Vgs2; Output capacitance Co, its first end connects the second end of second switch pipe Q2, and its second end connects the second end of the first switching tube Q1; The first feedback resistance Rfb1, its first end connects the second end of second switch pipe Q2; Output voltage feedback circuit 51, its input port connects the second end of output capacitance Co and the second end of the first feedback resistance Rfb1, and the voltage of this output voltage feedback circuit 51 based on input port obtains error signal VEA; PWM modulation circuit 52, its input connects the output of output voltage feedback circuit 51 to receive this error signal VEA, and this PWM modulation circuit 52 carries out pulse-width modulation according to this error signal VEA, to produce the first control signal Vgs and the second control signal Vgs2; With door AND1, its first input end connects the output of PWM modulation circuit 52, its second input reception control signal EN.
As a nonrestrictive example, the first switching tube Q1 can be the MOSFET pipe of N-type, and second switch pipe Q2 can be the MOSFET pipe of P type.Certainly, those skilled in the art also can adopt the switching tube of other types to realize identical function, such as JFET pipe etc.In addition, in the example shown in Fig. 5, second switch pipe Q2 can be also diode, and it is a kind of preferred scheme that Fig. 5 adopts P type MOSFET pipe, can obtain higher conversion efficiency, is also synchronous rectification.
Furthermore, this output voltage feedback circuit 51 can comprise: the first operational amplifier 511, and its first input end connects the second end of the first feedback resistance Rfb1, and its second termination is received default reference voltage Ref; The second feedback resistance Rfb2, its first end connects the second end of output capacitance Co, and its second end connects the first input end of the first operational amplifier 511; The first capacitor C 1, its first end connects the first input end of the first operational amplifier 511; The first resistance R 1, its first end connects the second end of the first capacitor C 1, and its second end connects the output of the first operational amplifier 511.
This PWM modulation circuit 52 can comprise: the second operational amplifier 521, and its first input end connects the output of output voltage feedback circuit 51 to receive this error signal VEA, and its second termination is received default pulse signal.
In example shown in Fig. 5, this step-up DC-DC current transformer can adopt voltage mode control.Certainly, those skilled in the art are to be understood that, this current transformer also can adopt conventional Controlled in Current Mode and Based (as peak current control or Average Current Control), and above-mentioned voltage mode control and Controlled in Current Mode and Based are this area general knowledge, repeat no more here.
In example shown in Fig. 5, output voltage feedback circuit 51, based on output voltage negative feedback, obtains error signal VEA, and this error signal VEA obtains pwm control signal by PWM modulation circuit 52, for controlling the turn-on and turn-off of the first switching tube Q1, with the output voltage that obtains expecting.The first control signal Vgs1 complementation of the second control signal Vgs2 of second switch pipe Q2 and the first switching tube Q1, also, during the first switching tube Q1 opens, second switch pipe Q2 turn-offs, in the first switching tube Q1 blocking interval second switch pipe Q2 conducting.In addition, the first control signal Vgs1 and the second control signal Vgs2 complementation also can comprise the situation that adds suitable Dead Time between the first control signal Vgs1 and the second control signal Vgs2, and this Dead Time can be provided by Dead Time circuit 53.Particularly, close and have no progeny at the first switching tube Q1, through suitable Dead Time, just conducting of second switch pipe Q2; Have no progeny and close at second switch pipe Q2, through suitable Dead Time, just conducting of the first switching tube Q1, arranges the short circuit that suitable Dead Time can prevent that two switching tube Q1 and Q2 conducting simultaneously from causing.Wherein, the realization of Dead Time is a kind of common practise to those skilled in the art, repeats no more here.
In example shown in Fig. 5, in the time of needs transmitted signal, for example, when outside key-press input signal detected, control signal EN is (being for example high level) effectively, with door AND1, the first control signal Vgs1 is transferred to the control end of the first switching tube Q1, for controlling the second control signal Vgs2 and the first control signal Vgs1 complementation of second switch pipe Q2, this step-up DC/DC current transformer is normally worked, obtain output voltage V o, now output voltage V o is relatively high predeterminated voltage (being aforementioned the first voltage).This predeterminated voltage is determined certainly, also can there is no feedback resistance in some application scenarios by reference voltage Ref and the first feedback resistance Rfb1 and the second feedback resistance Rfb2.
When without transmitted signal, for example, when outside key-press input signal do not detected, control signal EN invalid (being for example low level), blocked with door AND1 for the first control signal Vgs1 that controls the first switching tube Q1, the first switching tube Q1 turn-offs always, second switch pipe Q2 conducting always, input voltage (the namely voltage of battery) is transferred to output port by second switch pipe Q2, the magnitude of voltage of output voltage V o and input voltage consistent (not considering the pressure drop of inductance L and second switch pipe Q2 here) substantially, the magnitude of voltage of output voltage V o is now lower magnitude of voltage (being aforementioned second voltage), this step-up DC/DC current transformer is operated in bypass (bypass) state.
With reference to figure 6, Fig. 6 shows the physical circuit of another kind of step-up DC-DC current transformer, comprising: inductance L, and its first end is for connecting the positive pole of battery; The first switching tube Q1, its first end connects the second end of inductance L, and its second end is for connecting the negative pole of this battery, and its control end receives the first control signal Vgs1; Second switch pipe Q2, its first end connects the second end of inductance L, and its control end receives the second control signal Vgs2, the first control signal Vgs1 and the second control signal Vgs2 complementation; Output capacitance Co, its first end connects the second end of second switch pipe Q2, and its second end connects the second end of the first switching tube Q1; The first feedback resistance Rfb1, its first end connects the second end of second switch pipe Q2; Output voltage feedback circuit 61, its input port connects the second end of output capacitance Co and the second end of the first feedback resistance Rfb1, and this output voltage feedback circuit 61 voltage based on input port under the control of control signal EN obtains error signal VEA; PWM modulation circuit 62, its input connects the output of output voltage feedback circuit 61 to receive this error signal VEA, and this PWM modulation circuit 62 carries out pulse-width modulation to produce the first control signal Vgs1 and the second control signal Vgs2 according to this error signal VEA.
Wherein, this output voltage feedback circuit 61 comprises: the first operational amplifier 611, and its first input end connects the second end of the first feedback resistance Rfb1, and its second termination is received default reference voltage Ref; The second feedback resistance Rfb2, its first end connects the second end of output capacitance Co, and its second end connects the first input end of the first operational amplifier 611; Feedback switch Q3, its first end connects the first end of the second feedback resistance Rfb2, its control end reception control signal EN; The 3rd feedback resistance Rfb3, its first end connects the second end of feedback switch Q3, and its second end connects the second end of the second feedback resistance Rfb2; The first capacitor C 1, its first end connects the first input end of the first operational amplifier 611; The first resistance R 1, its first end connects the second end of the first capacitor C 1, and its second end connects the output of the first operational amplifier 611.
This PWM modulation circuit comprises: the second operational amplifier 621, and its first input end connects the output of output voltage feedback circuit 61, and its second termination is received default pulse signal.
Like the example class shown in Fig. 5, the example of Fig. 6 also can adopt Dead Time circuit 63 to add suitable Dead Time between the first control signal Vgs1 and the second control signal Vgs2.
Example shown in Fig. 6 regulates the voltage ratio of feedback by control signal EN, carry out the magnitude of voltage of regulation output voltage with this.Furthermore, for example, in the time that control signal EN is effective (being high level), feedback switch Q3 closure, the magnitude of voltage of output voltage is relatively high, is the first voltage; For example, in the time that control signal EN is invalid (low level), feedback switch Q3 disconnects, and the magnitude of voltage of output voltage is relatively low, is second voltage.
With reference to figure 7, Fig. 7 shows a kind of circuit structure of step-down DC-DC current transformer, and the DC/DC conversion circuit 31 shown in Fig. 3 also can adopt this circuit structure.Particularly, this circuit structure comprises: second switch pipe Q2, and its first end connects the positive pole of battery, and its control end receives the second control signal Vgs2; The first switch Q1, its first end connects the second end of second switch Q2, and its second end connects the negative pole of battery, and its control end receives the first control signal Vgs1; Inductance L, the second end of the second switch pipe Q2 that its first end connects; Output capacitance Co, its first end connects the second end of inductance L, and its second end connects the second end of the first switching tube Q1; The first feedback resistance Rfb1, its first end connects the first end of output capacitance Co; Output voltage feedback circuit 71, its input port connects the second end of output capacitance Co and the second end of the first feedback resistance Rfb1, and this output voltage feedback circuit 71 voltage based on input port under the control of control signal EN obtains error signal VEA; PWM modulation circuit 72, its input connects the output of output voltage feedback circuit 71 to receive this error signal VEA, this PWM modulation circuit 72 carries out pulse-width modulation according to this error signal VEA, produces the first control signal Vgs and the second control signal Vgs2 via not gate NOT.
Wherein, this output voltage feedback circuit 71 comprises: the first operational amplifier 711, and its first input end connects the second end of the first feedback resistance Rfb1, and its second termination is received default reference voltage Ref; The second feedback resistance Rfb2, its first end connects the second end of output capacitance Co, and its second end connects the first input end of the first operational amplifier 711; Feedback switch Q3, its first end connects the first end of the second feedback resistance Rfb2, its control end reception control signal EN; The 3rd feedback resistance Rfb3, its first end connects the second end of feedback switch Q3, and its second end connects the second end of the second feedback resistance Rfb2; The first capacitor C 1, its first end connects the first input end of the first operational amplifier 711; The first resistance R 1, its first end connects the second end of the first capacitor C 1, and its second end connects the output of the first operational amplifier 711.
This PWM modulation circuit comprises: the second operational amplifier 721, and its first input end connects the output of output voltage feedback circuit 71, and its second termination is received default pulse signal.
With the example class shown in Fig. 5, Fig. 6 seemingly, in the example of Fig. 7, can adopt Dead Time circuit 73 to add suitable Dead Time between the first control signal Vgs1 and the second control signal Vgs2.
Example shown in Fig. 7 regulates the voltage ratio of feedback by control signal EN, carry out the magnitude of voltage of regulation output voltage with this.Furthermore, for example, in the time that control signal EN is effective (being high level), feedback switch Q3 closure, the magnitude of voltage of output voltage is relatively high, is the first voltage; For example, in the time that control signal EN is invalid (low level), feedback switch Q3 disconnects, and the magnitude of voltage of output voltage is relatively low, is second voltage.
With reference to figure 8, Fig. 8 shows the circuit structure of another kind of step-down DC-DC current transformer, and the DC/DC conversion circuit 31 shown in Fig. 3 also can adopt this circuit structure.Particularly, this circuit structure comprises: second switch pipe Q2, and its first end connects the positive pole of battery, and its control end receives the second control signal Vgs2; The first switch Q1, its first end connects the second end of second switch Q2, and its second end connects the negative pole of battery, and its control end receives the first control signal Vgs1; Inductance L, the second end of the second switch pipe Q2 that its first end connects; Output capacitance Co, its first end connects the second end of inductance L, and its second end connects the second end of the first switching tube Q1; The first feedback resistance Rfb1, its first end connects the first end of output capacitance Co; Output voltage feedback circuit 81, its input port connects the second end of output capacitance Co and the second end of the first feedback resistance Rfb1, and the voltage of this output voltage feedback circuit 11 based on input port obtains error signal VEA; PWM modulation circuit 82, its input connects the output of output voltage feedback circuit 81 to receive this error signal VEA, this PWM modulation circuit 82 carries out pulse-width modulation according to this error signal VEA, produces the first control signal Vgs and the second control signal Vgs2 via not gate NOT with door AND1.
Furthermore, this output voltage feedback circuit 81 can comprise: the first operational amplifier 811, and its first input end connects the second end of the first feedback resistance Rfb1, and its second termination is received default reference voltage Ref; The second feedback resistance Rfb2, its first end connects the second end of output capacitance Co, and its second end connects the first input end of the first operational amplifier 811; The first capacitor C 1, its first end connects the first input end of the first operational amplifier 811; The first resistance R 1, its first end connects the second end of the first capacitor C 1, and its second end connects the output of the first operational amplifier 811.
This PWM modulation circuit 82 can comprise: the second operational amplifier 821, and its first input end connects the output of output voltage feedback circuit 51 to receive this error signal VEA, and its second termination is received default pulse signal.
With previous examples similarly, the example of Fig. 8 also can adopt Dead Time circuit 83 to add suitable Dead Time between the first control signal Vgs1 and the second control signal Vgs2.
In example shown in Fig. 8, in the time of needs transmitted signal, for example, when outside key-press input signal detected, control signal EN is (being for example high level) effectively, with door AND1, the first control signal Vgs1 is transferred to the control end of the first switching tube Q1, for controlling the second control signal Vgs2 and the first control signal Vgs1 complementation of second switch pipe Q2, this voltage-dropping type DC/DC current transformer is normally worked, obtain output voltage V o, now output voltage V o is predeterminated voltage (being aforementioned the first voltage).This predeterminated voltage is determined certainly, also can there is no feedback resistance in some application scenarios by reference voltage Ref and the first feedback resistance Rfb1 and the second feedback resistance Rfb2.
When without transmitted signal, for example, when outside key-press input signal do not detected, control signal EN invalid (being for example low level), blocked with door AND1 for the first control signal Vgs1 that controls the first switching tube Q1, the first switching tube Q1 turn-offs always, second switch pipe Q2 conducting always, input voltage (the namely voltage of battery) is transferred to output port by second switch pipe Q2, the magnitude of voltage of output voltage V o and input voltage consistent (not considering the pressure drop of inductance L and second switch pipe Q2 here) substantially, owing to being step-down applications, the magnitude of voltage of output voltage V o is now higher magnitude of voltage (being aforementioned second voltage), this voltage-dropping type DC/DC current transformer is operated in bypass (bypass) state.
With reference to figure 9, Fig. 9 shows and makes the working waveform figure of battery-powered device in the time adopting step-down type dc/direct current power transformation road (example circuit structure) as shown in Figure 8 shown in Fig. 3.Within the t0-t1 time period, without transmitted signal, the control signal EN that control circuit 33 produces is low level signal, and the output voltage V o that voltage-dropping type DC/DC current transformer 31 produces is higher voltage V2; In the t1-t2 stage, control circuit 33 detects input signal, need transmitted signal, at this one-phase, the output control signal EN that control circuit 33 produces is high level signal, and the output voltage V o that step-down DC-DC converter 31 produces is lower voltage V1, in the t1-t2 stage, control circuit 33, by the turn-on and turn-off of control switch S1, with certain frequency and duty ratio, makes the agreement outside transmitted signal of transmitting tube 32 with agreement.
With reference to Figure 10, Figure 10 shows a kind of circuit structure of buck DC/DC converter, and the DC/DC conversion circuit 31 shown in Fig. 3 also can adopt this circuit structure.Particularly, this circuit structure comprises: second switch pipe Q2, and its first end connects the positive pole of battery, and this battery can be for example the battery of a batteries or two joint series connection, and its control end receives the second control signal Vgs2; The first switch Q1, its first end connects the second end of second switch Q2, and its control end receives the first control signal Vgs1; Inductance L, the second end of the second switch pipe Q2 that its first end connects, its second end connects the negative pole of battery; Output capacitance Co, its first end connects the second end of the first switching tube Q1, and its second end connects the negative pole of battery; The first feedback resistance Rfb1, its first end connects the first end of output capacitance Co; Output voltage feedback circuit 101, its input port connects the second end of output capacitance Co and the second end of the first feedback resistance Rfb1, and this output voltage feedback circuit 101 voltage based on input port under the control of control signal EN obtains error signal VEA; PWM modulation circuit 102, its input connects the output of output voltage feedback circuit 101 to receive this error signal VEA, this PWM modulation circuit 102 carries out pulse-width modulation according to this error signal VEA, produces the first control signal Vgs and the second control signal Vgs2 via not gate NOT.
Wherein, this output voltage feedback circuit 101 comprises: the first operational amplifier 1011, and its first input end connects the second end of the first feedback resistance Rfb1, and its second termination is received default reference voltage Ref; The second feedback resistance Rfb2, its first end connects the second end of output capacitance Co, and its second end connects the first input end of the first operational amplifier 1011; Feedback switch Q3, its first end connects the first end of the second feedback resistance Rfb2, its control end reception control signal EN; The 3rd feedback resistance Rfb3, its first end connects the second end of feedback switch Q3, and its second end connects the second end of the second feedback resistance Rfb2; The first capacitor C 1, its first end connects the first input end of the first operational amplifier 1011; The first resistance R 1, its first end connects the second end of the first capacitor C 1, and its second end connects the output of the first operational amplifier 1011.
This PWM modulation circuit comprises: the second operational amplifier 1021, and its first input end connects the output of output voltage feedback circuit 101, and its second termination is received default pulse signal.
With aforementioned each example class seemingly, in the example of Figure 10, can adopt Dead Time circuit 103 to add suitable Dead Time between the first control signal Vgs1 and the second control signal Vgs2.
Example shown in Figure 10 regulates the voltage ratio of feedback by control signal EN, carry out the magnitude of voltage of regulation output voltage with this.Furthermore, for example, in the time that control signal EN is effective (being high level), feedback switch Q3 closure, the magnitude of voltage of output voltage is relatively high, is the first voltage; For example, in the time that control signal EN is invalid (low level), feedback switch Q3 disconnects, and the magnitude of voltage of output voltage is relatively low, is second voltage.
By upper, the embodiment of the present invention adopts booster circuit that the boost in voltage of single battery is converted to stable output voltage, the impact that makes the power supply of power circuit not changed by cell voltage.
Coordinate typical case's application such as remote controller, the output voltage of this booster circuit can be the optimal value meeting under transmitting tube power requirement.In addition, when transmitting, this booster circuit can the lower output voltage of output voltage values, to reduce standby current, further extends battery life.Certainly, the device of the present embodiment is not limited to remote controller, can also be that other variously make battery-powered device.
In addition, the present embodiment also provides a kind of method of supplying power to that makes battery-powered device, comprises the steps:
Detect input signal, and produce based on this input signal the control signal that is used to indicate this device operating state;
Using DC/DC conversion circuit is output voltage according to this control signal by the voltage transitions at battery two ends, if it is non-holding state that described control signal is indicated this device, the magnitude of voltage of described output voltage is the first voltage, if it is holding state that described control signal is indicated this device, the magnitude of voltage of described output voltage is the second voltage that is different from this first voltage;
Described output voltage is transferred to power circuit, to give described power circuit power supply.
Preferably, this first voltage is greater than this second voltage.For example, with reference to figure 3, taking remote controller as example, can use booster circuit 31 that the boost in voltage at battery 30 two ends is converted to output voltage V o, the magnitude of voltage of this output voltage V o is determined by the operating state of installing, in the time that device needs transmitted signal, the magnitude of voltage of output voltage V o is the first relatively high voltage, in the time of device standby, while namely not needing transmitted signal, the magnitude of voltage of output voltage V o is relatively low second voltage.
Certainly, the method is not limited to remote controller, and can also adopt the method is that other battery powered devices are powered.
In some battery powered application scenarios, as adopted lithium battery power supply, the voltage of battery power supply itself is higher, and the voltage range in single-lithium-battery pond is generally 3V～4.2V, and the voltage more required than load is high.As be applied to the occasion of above-mentioned remote controller, and its supply power voltage also exceeds much than transmitting tube required voltage, and in the time that cell voltage is higher, the electric current of the transmitting tube of flowing through is very large, increases the consumption of battery; In order to limit the electric current of transmitting tube, the transmitting tube current-limiting resistance Rs in previous embodiment that also needs to connect, has introduced extra loss.And in this type of application, the energy content of battery is mainly launched this class load consumption of pipe.Therefore, powered battery mode is equally very not energy-conservation.Based on thought of the present invention, in the schematic diagram shown in Fig. 3, can utilize step-down type dc/DC converting circuit to realize making full use of of battery capacity, as Buck current transformer.
Adopt a kind of execution mode of step-down type dc/DC transfer circuit as shown in Figure 7.Under the different mode of operation of device, export different voltage, in the time that needs are launched, provide the first voltage V1, when without transmitting, provide second voltage V2, its steady operation waveform is also as shown in Figure 4.
In powered battery compared with high and adopt in step-down type dc/DC converting circuit, as previously mentioned, because main current consuming apparatus in device is the load of transmitting tube and so on, therefore, an applicable voltage V1 is provided in the time need to launching, thereby the electric current of the transmitting tube that makes to flow through reaches set point, this set point can be to meet the minimum current that emissive porwer requires.And in the time input signal not detected, namely in the time that no signal sends, the no current transmitting tube of flowing through, main current consuming apparatus is closed, therefore, the height of supply power voltage does not affect the power consumption of system, provides a high voltage can not increase the power consumption of device yet.As another kind of execution mode, even can be by closing step-down DC-DC converter, directly utilize higher cell voltage power supply, further reduction power consumption, as shown in Figure 8, as shown in Figure 9, now second voltage is higher than the first voltage for steady operation waveform for its execution mode.
In some application systems, powered battery voltage may be more high or low than the needed voltage of main power consumption equipment (load).As adopt the remote controller of binodal dry cell power supply, more needed when low (battery used after a period of time) than load when cell voltage, battery remaining power cannot utilize.In order to make full use of the capacity of dry cell, in the execution mode shown in Fig. 3 (power supply is two batteries), can adopt buck-boost type DC/DC conversion circuit to implement, its execution mode is as shown in figure 10.No matter input voltage size of buck DC/DC conversion circuit, all convertible magnitudes of voltage that obtains a setting, this magnitude of voltage can be more high or low than input voltage.In the time that needs are launched, a first voltage V1 is provided, when without transmitting, provide a second voltage V2, its steady operation waveform is also as shown in Figure 4.
In a word, no matter how detailed specification is, can implement in many ways in addition the present invention.Described in specification, be only one or more specific embodiment of the present invention, be not exhaustive or for limit the present invention to above-mentioned clear and definite in form.Above-mentioned with schematic object, specific embodiment of the present invention and example are described in, those skilled in the art will recognize that and can carry out within the scope of the invention various equivalent modifications, the details of circuit structure and control mode thereof is carried out in details and can be carried out considerable variation at it.All any equivalences that essence is made according to the present invention change, within all should being under the jurisdiction of protection scope of the present invention.
The present invention's enlightenment provided here is not must be applied in said system, can also be applied in other system, can produce more embodiment.Therefore, actual range of the present invention not only comprises the disclosed embodiments, is also included under claims and implements or to carry out all equivalents of the present invention.
Claims (13)
1. make a battery-powered device, it is characterized in that, comprising:
Control circuit, for detection of input signal, and produces the control signal that is used to indicate this device operating state based on this input signal;
DC/DC conversion circuit, its input port is for connecting positive pole and the negative pole of battery, this DC/DC conversion circuit receives described control signal, the input voltage of described input port is converted to output voltage, indicating this device in response to described control signal is non-holding state, the magnitude of voltage of the output voltage that described DC/DC conversion circuit produces is the first voltage, indicating this device in response to described control signal is holding state, and the magnitude of voltage of the output voltage that described DC/DC conversion circuit produces is the second voltage that is different from this first voltage;
Power circuit, is connected to receive described output voltage with the output port of described DC/DC conversion circuit.
2. according to claim 1ly make battery-powered device, it is characterized in that, described power circuit is signal sending circuit, and this power circuit comprises transmitting tube, the first end of the output port of booster circuit described in its anodic bonding,
This control circuit has I/O end and ground end, and this I/O end connects the negative electrode of described transmitting tube, and this ground end connects the second end of described output port, and described control circuit comprises:
Switch, its first end connects described I/O end, and its second end connects to be held describedly;
Testing circuit, for detection of this input signal, in the time this input signal being detected, produce and transmit control signal, this transmit control signal transfer to described switch control end to control the turn-on and turn-off of described switch, described in not producing in the time described input signal not detected, transmit control signal.
3. according to claim 2ly make battery-powered device, it is characterized in that, described testing circuit also produces described control signal according to described input signal, in the time this input signal being detected described in control signal effective, in the time described input signal not detected described in control signal invalid;
Described DC/DC conversion circuit is subject to described control signal control, and in the time that described control signal is effective, the magnitude of voltage of described output voltage is described the first voltage, and in the time that described control signal is invalid, the magnitude of voltage of described output voltage is described second voltage.
4. according to the battery-powered device that makes described in any one in claims 1 to 3, it is characterized in that, described DC/DC conversion circuit is booster type DC/DC converter, step-down type dc/DC convertor or buck-boost type DC/DC converter.
5. according to claim 3ly make battery-powered device, it is characterized in that, described DC/DC conversion circuit comprises:
Inductance, its first end is for connecting the positive pole of described battery;
The first switching tube, its first end connects the second end of described inductance, and its second end is for connecting the negative pole of described battery, and its control end receives the first control signal;
Second switch pipe, its first end connects the second end of described inductance, and its control end receives the second control signal;
Output capacitance, its first end connects the second end of described second switch pipe, and its second end connects the second end of described the first switching tube;
The first feedback resistance, its first end connects the second end of described second switch pipe;
Output voltage feedback circuit, its input port connects first end and second end of described output capacitance, and the output voltage of this output voltage feedback circuit based on described output capacitance two ends obtains error signal;
PWM modulation circuit, its input connects the output of described output voltage feedback circuit to receive this error signal, and this PWM modulation circuit carries out pulse-width modulation to produce described the first control signal and the second control signal according to this error signal;
With door, its first input end connects the output of described PWM modulation circuit, and its second input receives described output control signal.
6. according to claim 5ly make battery-powered device, it is characterized in that, described output voltage feedback circuit comprises:
The first operational amplifier, its first input end connects the second end of described the first feedback resistance, and its second termination is received default reference voltage;
The second feedback resistance, its first end connects the second end of described output capacitance, and its second end connects the first input end of described the first operational amplifier;
The first electric capacity, its first end connects the first input end of described the first operational amplifier;
The first resistance, its first end connects the second end of described the first electric capacity, and its second end connects the output of described the first operational amplifier.
7. according to claim 3ly make battery-powered device, it is characterized in that, described DC/DC conversion circuit comprises:
Inductance, its first end is for connecting the positive pole of described battery;
The first switching tube, its first end connects the second end of described inductance, and its second end is for connecting the negative pole of described battery, and its control end receives the first control signal;
Second switch pipe, its first end connects the second end of described inductance, and its control end receives the second control signal, described the first control signal and the second control signal complementation;
Output capacitance, its first end connects the second end of described second switch pipe, and its second end connects the second end of described the first switching tube;
The first feedback resistance, its first end connects the second end of described second switch pipe;
Output voltage feedback circuit, its input port connects first end and second end of described output capacitance, and this output voltage feedback circuit output voltage based on described output capacitance two ends under the control of described output control signal obtains error signal;
PWM modulation circuit, its input connects the output of described output voltage feedback circuit to receive this error signal, and this PWM modulation circuit carries out pulse-width modulation to produce described the first control signal and the second control signal according to this error signal.
8. according to claim 7ly make battery-powered device, it is characterized in that, described output voltage feedback circuit comprises:
The first operational amplifier, its first input end connects the second end of described the first feedback resistance, and its second termination is received default reference voltage;
The second feedback resistance, its first end connects the second end of described output capacitance, and its second end connects the first input end of described the first operational amplifier;
Feedback switch, its first end connects the first end of described the second feedback resistance, and its control end receives described output control signal;
The 3rd feedback resistance, its first end connects the second end of described feedback switch, and its second end connects the second end of described the second feedback resistance;
The first electric capacity, its first end connects the first input end of described the first operational amplifier;
The first resistance, its first end connects the second end of described the first electric capacity, and its second end connects the output of described the first operational amplifier.
9. according to the battery-powered device that makes described in any one in claim 5 to 8, it is characterized in that, described PWM modulation circuit comprises:
The second operational amplifier, its first input end connects the output of described output voltage feedback circuit, and its second termination is received default pulse signal.
10. according to the battery-powered device that makes described in any one in claims 1 to 3,5 to 8, it is characterized in that, the input port of described DC/DC conversion circuit is for connecting positive pole and the negative pole of same battery.
11. according to the battery-powered device that makes described in any one in claims 1 to 3,5 to 8, it is characterized in that, described the first voltage is greater than described second voltage.
12. 1 kinds make the method for supplying power to of battery-powered device, it is characterized in that, comprising:
Detect input signal, and produce based on this input signal the control signal that is used to indicate this device operating state;
Using DC/DC conversion circuit is output voltage according to this control signal by the voltage transitions at battery two ends, if it is non-holding state that described control signal is indicated this device, the magnitude of voltage of described output voltage is the first voltage, if it is holding state that described control signal is indicated this device, the magnitude of voltage of described output voltage is the second voltage that is different from this first voltage;
Described output voltage is transferred to power circuit, to give described power circuit power supply.
13. method of supplying power to according to claim 12, is characterized in that, described the first voltage is greater than described second voltage.
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| CN110658468A (en) * | 2019-09-17 | 2020-01-07 | 安徽容知日新科技股份有限公司 | Battery state detection device |
| CN111740588A (en) * | 2019-03-25 | 2020-10-02 | 罗富尧 | Built-in voltage doubler in microcontroller unit for single-cell remote control for long-range IR and Bluetooth low energy transmission |
| EP3968488A1 (en) * | 2020-09-10 | 2022-03-16 | Fu Yiu Law | Built-in voltage doubler in a microcontroller unit of a one-cell battery remote for long-distance infra-red (ir) and low-power bluetooth low energy (ble) transmission |
| CN116470620A (en) * | 2023-05-13 | 2023-07-21 | 深圳市汇一技研有限公司 | Discharging circuit, battery management module, power supply module and electric equipment |
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| CN102904444A (en) * | 2012-08-07 | 2013-01-30 | 上海交通大学 | DC/DC Conversion and Control System Based on Proton Exchange Membrane Fuel Cell |
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