CN202906525U - A mobile power supply - Google Patents
A mobile power supply Download PDFInfo
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- CN202906525U CN202906525U CN2012205898987U CN201220589898U CN202906525U CN 202906525 U CN202906525 U CN 202906525U CN 2012205898987 U CN2012205898987 U CN 2012205898987U CN 201220589898 U CN201220589898 U CN 201220589898U CN 202906525 U CN202906525 U CN 202906525U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
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Abstract
The utility model provides a mobile power supply comprising a battery, an inductor L1, a capacitor C2, a first switch, a second switch, a third switch, and a charging and power supplying control circuit. The first switch is connected between a power supplying node and a middle node. The inductor L1 is connected between the middle node and a battery node. The capacitor C2 is connected between the battery node and ground. The second switch is connected between the middle node and the ground. The third switch is connected between the middle node and a charging node. When a charging power supply is connected with the charging node, the charging and power supplying control circuit controls the first switch to be opened and controls the second switch and the third switch to be closed alternatively. When the charging power supply is not connected with the charging node, the charging and power supplying control circuit controls the third switch to be opened and controls the first switch and the second switch to be closed alternatively. Part peripheral devices are shared by a charging circuit and a power supplying circuit of the mobile power supply. Therefore, not only is a high-efficiency charging mode provided, but also only a few peripheral devices are used so as to achieve low cost.
Description
[technical field]
The utility model relates to field of power supplies, particularly a kind of portable power source.
[background technology]
Portable power source is a kind of portable charger that integrates power supply and charge function, and it can charge or the standby power supply whenever and wherever possible to digital equipments such as mobile phones.Generally by lithium cell or dry cell as charge storage unit.Be different from the battery of interiors of products configuration, also be externally hanging battery.The general multiple power sources adapter that is equipped with, usually have large capacity, multipurpose, volume is little, the life-span is long and the characteristics such as safe and reliable, be can be whenever and wherever possible to be the functional product of the multiple digital product power supply such as mobile phone, MP3, MP4, PDA, palmtop PC, handheld device or standby charging.
Please refer to shown in Figure 1ly, it is the circuit diagram of portable power source in the prior art.This portable power source comprises battery BAT, charging circuit 110 and power supply circuits 120.The charge power supply that is connected with charge node VCHG is charged via 110 couples of battery BAT of described charging circuit; Described battery BAT is powered system via 120 pairs of described power supply circuits and powers, and the output of described power supply circuits 120 is supply node VSYS.Battery BAT is connected between battery node VBAT and the ground, and according to system's needs, battery BAT can comprise battery core and battery protecting circuit.Described charging circuit 110 comprises charge management circuit 112, capacitor C 3 and C4.Wherein, capacitor C 3 is connected between battery node VBAT and the ground; Capacitor C 4 is connected between charge node VCHG and the ground; The input of described charge management circuit 112 links to each other with charge node VCHG, and its output links to each other with battery node VBAT, when charge power supply links to each other with described charge node VCHG, is managed by the charging process of 110 couples of battery BAT of described charging circuit.Described power supply circuits 120 comprise boost control circuit 122, K switch 1 and K2, inductance L 1, capacitor C 1 and C2.Wherein, K switch 1, inductance L 1 and capacitor C 2 are connected successively is connected in the output that supply node VSYS(also can be described as described power supply circuits 120) and ground between; Capacitor C 1 is connected between supply node VSYS and the ground; K switch 2 is connected between the connected node and ground between K switch 1 and the inductance L 1; The earth terminal GND of described boost control circuit 122 is connected to the ground, the first drive end DRV1 links to each other with the control end of K switch 2, the second drive end DRV2 links to each other with the control end of K switch 1, namely be powered system and link to each other with supply node VSYS when being powered the described power supply circuits 120(of system access) time, described boost control circuit 122 drives signal DRV1 and the second driving signal DRV2 according to voltage (also can be described as the supply power voltage of the described power supply circuits 120) output first of supply node VSYS, with control switch K1 and K2 alternate conduction, power thereby make described battery BAT be powered system via 120 pairs of described power supply circuits.
In the prior art, charging circuit 110 and power supply circuits 120 are relatively independent, and charge management circuit more than 112 adopts the linear-charging structure, and its charge efficiency is low, and heating is serious, cause the lower charging current of conventional encapsulation too little, and the charging interval is oversize.If simply adopt the switching mode charging circuit, then need extra inductance and too much switching device, cost will increase much like this.
Therefore, be necessary to provide a kind of improved portable power source to overcome the problems referred to above.
[utility model content]
The purpose of this utility model is to provide a kind of portable power source, and its charge efficiency is high, and it is low to generate heat, and keeps simultaneously less peripheral components, realizes low-cost.
In order to address the above problem, the utility model provides a kind of portable power source, it comprises battery, inductance L 1, capacitor C 2, the first switch, second switch, the 3rd switch and charging-power-supplying circuit, battery is connected between battery node and the ground, the first switch is connected between supply node and the intermediate node, inductance L 1 is connected between intermediate node and the battery node, capacitor C 2 is connected between battery node and the ground, second switch is connected between intermediate node and the ground, and the 3rd switch is connected between intermediate node and the charge node; When charge power supply linked to each other with charge node, described charging-power-supplying circuit was controlled the first switch and is turn-offed, and control second switch and the 3rd switch alternate conduction; When charge power supply did not link to each other with charge node, described charging-power-supplying circuit was controlled the 3rd switch and is turn-offed, and controls the first switch and second switch alternate conduction.
Further, described charging-power-supplying circuit comprises charge power supply decision circuitry, switching mode charging control circuit and switching mode power-supplying circuit, described charge power supply decision circuitry judges according to the voltage of charge node whether charge power supply links to each other with described charge node, and the output mode control signal; When charge power supply links to each other with charge node, described mode control signal is controlled the first switch and is turn-offed, the described switching mode power-supplying circuit of disable enables described switching mode charging control circuit, by described switching mode charging control circuit control second switch and the 3rd switch alternate conduction; When charge power supply does not link to each other with charge node, described mode control signal is controlled the 3rd switch and is turn-offed, the described switching mode charging control circuit of disable enables described switching mode power-supplying circuit, controls the first switch and second switch alternate conduction by described switching mode power-supplying circuit.
Further, between charge node and ground, be connected with capacitor C 3, between supply node and ground, be connected with C1, when charge power supply links to each other with charge node, described charging-power-supplying circuit, second switch, the 3rd switch, inductance L 1, capacitor C 2 and capacitor C 3 form the switching mode charging circuit, this moment, charge power supply was charged to battery by this switching mode charging circuit, when charge power supply links to each other with charge node, described charging-power-supplying circuit, the first switch, second switch, inductance L 1, capacitor C 1 and capacitor C 2 form the switching mode power supply circuits, and this moment, battery was powered by these switching mode power supply circuits pair system that is powered that links to each other with supply node.
Further, after described switching mode charging control circuit is enabled, described switching mode charging control circuit drives signal and the second charging driving signal according to the voltage of charge node and Voltage-output first charging of battery node, with control second switch and the 3rd switch alternate conduction; After described switching mode power-supplying circuit is enabled, described switching mode power-supplying circuit drives signal and the second power supply driving signal according to the voltage of supply node and Voltage-output first power supply of battery node, to control the first switch and second switch alternate conduction.
Further, described charge power supply decision circuitry compares voltage and a reference voltage of described charge node, and when the voltage of charge node during greater than reference voltage, the mode control signal of its output is the first logic level; When the voltage of charge node during less than reference voltage, the mode control signal of its output is the second logic level.
Further, described charge power supply decision circuitry is a hysteresis comparator, the positive input of this hysteresis comparator links to each other with described charge node, its negative-phase input links to each other with described reference voltage, its output is exported described mode control signal, when the voltage of charge node during greater than reference voltage, the saltus step of hysteresis comparator delayed mode control signal is the time of the first logic level.
Further, described reference voltage is the voltage of battery node.
Further, when charge power supply linked to each other with charge node, the sense of current of inductance L 1 flowed to battery node by intermediate node; When charge power supply did not link to each other with charge node, the inductive current direction flowed to intermediate node by battery node.
Compared with prior art, the charging circuit in the portable power source of the present utility model and power supply circuits multiplexing part peripheral components not only can provide high efficiency charging modes, and keep less peripheral components, realize low-cost.
[description of drawings]
In order to be illustrated more clearly in the technical scheme of the utility model embodiment, 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 embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.Wherein:
Fig. 1 is the circuit diagram of portable power source in the prior art;
Fig. 2 is the portable power source circuit diagram in one embodiment in the utility model;
Fig. 3 is the charging-power-supplying circuit circuit diagram in one embodiment among Fig. 2; With
Fig. 4 is the charge power supply decision circuitry schematic diagram in one embodiment among Fig. 3.
[embodiment]
For above-mentioned purpose of the present utility model, feature and advantage can be become apparent more, below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Alleged " embodiment " or " embodiment " refer to be contained in special characteristic, structure or the characteristic at least one implementation of the utility model herein.Different local in this manual " in one embodiment " that occur not are all to refer to same embodiment, neither be independent or the embodiment mutually exclusive with other embodiment optionally.Unless stated otherwise, herein connection, the word that the expression that links to each other, join is electrically connected all represents directly or indirectly to be electrical connected.
Portable power source comprises switching mode charging circuit and switching mode power supply circuits in the utility model, and charging circuit and power supply circuits multiplexing part peripheral components, thereby not only can provide high efficiency charging modes, and keep less peripheral components, realize low-cost.
Please refer to shown in Figure 2ly, it is the portable power source circuit diagram in one embodiment in the utility model.Described portable power source comprises battery BAT, inductance L 1, capacitor C 2, the first K switch 1, second switch K2, the 3rd K switch 3 and charging-power-supplying circuit.Battery BAT is connected between battery node VBAT and the ground, and according to system's needs, battery BAT can comprise battery core and battery protecting circuit; The first K switch 1 is connected between supply node VSYS and the intermediate node LX, inductance L 1 is connected between intermediate node LX and the battery node VBAT, capacitor C 2 is connected between battery node VBAT and the ground, second switch K2 is connected between intermediate node LX and the ground, and the 3rd K switch 3 is connected between intermediate node LX and the charge node VCHG; Described charging-power-supplying circuit is used for the on off state of the first K switch 1, second switch K2 and the 3rd K switch 3 is controlled, when charge power supply links to each other (namely having charge power supply to insert) with charge node VCHG, described charging-power-supplying circuit is controlled the first K switch 1 and is turn-offed, and control second switch K2 and the 3rd K switch 3 alternate conduction; When charge power supply did not link to each other (being that charge power supply is not inserted or charge power supply is removed) with charge node VCHG, described charging-power-supplying circuit was controlled the 3rd K switch 3 and is turn-offed, and controls the first K switch 1 and second switch K2 alternate conduction.
In the present embodiment, described portable power source also comprises capacitor C 1 and C3.Capacitor C 1 is connected between supply node VSYS and the ground, and capacitor C 3 is connected between charge node VCHG and the ground.The electrical connection VSYS that supplies that the battery that the charging that described charging-power-supplying circuit comprises the first switch control end K1G that is connected with the control end of the first K switch 1, the second switch control end K2G that is connected with the control end of second switch K2, the 3rd switch control end K3G that is connected with the control end of the 3rd K switch 3, be connected with charge node VCHG connects the VCHG end, is connected with battery node VBAT connects the VBAT end, be connected with supply node VSYS holds, the earth terminal GND that is connected with ground, the Rset that is connected with ground by resistance R 1 holds.
Below specifically introduce the course of work of described portable power source.
When charge power supply links to each other with charge node VCHG, described charging-power-supplying circuit is operated in charge mode, be that described charging-power-supplying circuit is controlled 1 shutoff of the first K switch, and control second switch K2 and the 3rd K switch 3 alternate conduction, described charging-power-supplying circuit, described second switch K2, the 3rd K switch 3, inductance L 1, capacitor C 2 and capacitor C 3 form switching mode step-down charging circuits at this moment, charge power supply is charged to battery BAT by this step-down charging circuit, and namely portable power source is operated in charge mode.In the portable power source design, (general charging voltage VCHG is 4.5V ~ 6V because the voltage ratio cell voltage VBAT of charge node VCHG is high, lithium battery voltage is full of and is 4.2V), therefore, the switching mode charging circuit that forms in the described portable power source adopts reduction voltage circuit comparatively suitable.When charge node VCHG does not link to each other with charge power supply, described charging-power-supplying circuit is operated in power supply state, be that described charging-power-supplying circuit is controlled 3 shutoffs of the 3rd K switch, and control the first K switch 1 and second switch K2 alternate conduction, this moment, described charging-power-supplying circuit, described the first K switch 1, second switch K2, inductance L 1, capacitor C 1 and capacitor C 2 formed the switching modes power supply circuits that boost, battery BAT is powered by this power supply circuits pair system that is powered that links to each other with supply node VSYS of boosting, and namely portable power source is operated in powering mode.In the portable power source design, high (generally supply power voltage VSYS is 5V because the supply power voltage on the supply node VSYS is than cell voltage VBAT, the discharge voltage interval range of lithium battery is 3V ~ 4.2V), therefore, the switching mode power supply circuits that form in the described portable power source adopt booster circuit comparatively suitable.
Portable power source in the utility model all is to rely on the inductance L 1 high efficiency energy of moving when charge mode and powering mode, and inductance L 1 is crucial energy-storage travelling wave tube.But the direction of inductive current is different under two kinds of patterns, and under the charge mode, the inductive current direction flows to battery node VBAT by intermediate node LX; Under the powering mode, the inductive current direction flows to intermediate node LX by battery node VBAT.
In sum, when the portable power source in the utility model is operated in charge mode, form the switching mode charging circuit by charging-power-supplying circuit, second switch K2, the 3rd K switch 3, inductance L 1, capacitor C 2 and capacitor C 3, so that the charging process of battery BAT is controlled.When portable power source is operated in powering mode, form the switching mode power supply circuits by charging-power-supplying circuit, the first K switch 1, second switch K2, inductance L 1, capacitor C 1 and capacitor C 2, so that the power supply process of battery BAT is controlled.Charging circuit and the multiplexing second switch K2 of power supply circuits, inductance L 1 and capacitor C 2 that described portable power source forms, therefore, with respect to existing scheme, the portable power source in the utility model has been saved peripheral components, its cost.Simultaneously, because wherein charging circuit is the switching mode charging circuit, therefore, the portable power source in the utility model has efficient charge mode.
Please refer to shown in Figure 3ly, it is the charging-power-supplying circuit circuit diagram in one embodiment among Fig. 2.Described charging-power-supplying circuit comprises charge power supply decision circuitry 310, switching mode charging control circuit 320 and switching mode power-supplying circuit 330.
Described charge power supply decision circuitry 310 judges according to the voltage of charge node VCHG whether charge power supply links to each other with described charge node VCHG, and output mode control signal mod.In one embodiment, when the voltage of charge node VCHG during greater than reference voltage REF, the mode control signal mod of its output is the first logic level, and the expression charge power supply is connected to described charge node VCHG; When the voltage of charge node VCHG during less than reference voltage REF, the mode control signal mod of its output is the second logic level, and the expression charge power supply is not connected to described charge node VCHG.
Please refer to shown in Figure 4ly, it is the charge power supply decision circuitry schematic diagram in one embodiment among Fig. 3.Described charge power supply decision circuitry is a hysteresis comparator ComHY, the positive input of this hysteresis comparator ComHY links to each other with described charge node VCHG, its negative-phase input links to each other with described reference voltage REF, reference voltage REF can be made as 3V ~ 4.5V, its output is exported described mode control signal mod, when the voltage of charge node VCHG is higher than reference voltage REF, hysteresis comparator ComHY delayed mode control signal mod saltus step is the time of high level (i.e. the first logic level), and can be 0 ~ 100uS time of delay.When the voltage of charge node VCHG was lower than reference voltage REF, mode control signal mod saltus step was low level (i.e. the second logic level), and the party upwards generally need not time-delay.Hesitation is so that threshold voltage is lower than reference voltage REF, for example VREF-Vhy.Wherein VREF is the magnitude of voltage of reference voltage REF, and Vhy is hysteresis voltage, and for example Vhy is 0 ~ 200mV.Described reference voltage REF can be fixed voltage, also can be the voltage of battery node VBAT.When described reference voltage REF is the voltage of battery node VBAT, described charge power supply decision circuitry 310 compares the voltage of charge node VCHG and the voltage of battery node VBAT, when the voltage of charge node VCHG is higher than the voltage of battery node VBAT, mode control signal mod becomes high level, and the expression charge power supply has connected charge node; When the voltage of charge node VCHG was lower than the voltage of battery node VBAT, mode control signal mod became low level, and the expression charge power supply is not connected to charge node.
Please continue with reference to shown in Figure 3, when described mode control signal mod is the first logic level, be that charge power supply is when linking to each other with described charge node VCHG, the first K switch 1 is turn-offed, the described switching mode power-supplying circuit 330 of the first logic level disable, enable described switching mode charging control circuit 320, by described switching mode charging control circuit 320 control second switch K2 and the 3rd K switch 3 alternate conduction; When described mode control signal mod is the second logic level, the 3rd K switch 3 is turn-offed, the described switching mode charging control circuit 320 of the second logic level disable, enable described switching mode power-supplying circuit 330, by described switching mode power-supplying circuit 330 control the first K switch 1 and second switch K2 alternate conduction.In embodiment as shown in Figure 3, after described switching mode charging control circuit 320 is enabled, described switching mode charging control circuit 320 drives signal and the second charging driving signal according to the voltage of charge node VCHG and Voltage-output the first charging of battery node VBAT, with control second switch K2 and the 3rd K switch 3 alternate conduction; After described switching mode power-supplying circuit 330 is enabled, described switching mode power-supplying circuit 330 drives signal and the second power supply driving signal according to the voltage of supply node VSYS and Voltage-output the first power supply of battery node VBAT, to control the first K switch 1 and second switch K2 alternate conduction.Here, switching mode charging control circuit 320 can adopt that various implementations realize in the prior art, such as the pulse-width modulation circuit of peak current charging control circuit, fixed frequency etc., for simplified characterization, omits herein.Switching mode power-supplying circuit 330 can adopt also that various implementations realize in the prior art, and such as the pulse-width modulation circuit of fixed frequency, frequency modulation circuit etc. for simplified characterization, omitted herein.
The following specifically describes charging-power-supplying circuit shown in Figure 3.Described charging-power-supplying circuit also comprise first with a door AND1, second with door AND2, the 3rd with a door AND3, the 4th with AND4, one or an OR1 and a reverser INV1.
The charging of described switching mode charging control circuit 320 connects the VCHG end and links to each other with described charge node VCHG, battery connects the VBAT end and links to each other with described battery node VBAT, mod end (being Enable Pin) links to each other with the output of charge power supply decision circuitry 310, Rset end and resistance R 1(are as shown in Figure 1) an end link to each other, the other end of resistance R 1 is connected to the ground, described the first charging of KA2 end output drives signal, and described the second charging of KA3 end output drives signal; The battery of described switching mode power-supplying circuit 330 connects the VBAT end and links to each other with battery node VBAT, mod end (being Enable Pin) links to each other with the output of charge power supply decision circuitry 310, link to each other with described supply node VSYS for being electrically connected the VSYS end, described the first power supply of KB1 end output drives signal, and described the second power supply of KB2 end output drives signal; First links to each other with the output of charge power supply decision circuitry 310 with the input of door AND1, another input links to each other with the KA3 end of described switching mode charging control circuit 320, and its output (i.e. the 3rd switch control end K3G) links to each other (as shown in Figure 2) with the control end of the 3rd K switch 3; Second links to each other with the output of charge power supply decision circuitry 310 with the input of door AND2, and another input links to each other with the KA2 end of described switching mode charging control circuit 320; The 3rd links to each other with the KB1 end of described switching mode power-supplying circuit 330 with input of door AND3, another input links to each other with the output of reverser INV1, the input of reverser INV1 links to each other with the output of described charge power supply decision circuitry 310, the 3rd with the door AND3 output (i.e. the first switch control end K1G) link to each other (as shown in Figure 2) with the control end of described the first K switch 1; The 4th links to each other with the KB2 end of described switching mode power-supplying circuit 330 with input of door AND4, and another input links to each other with the output of reverser INV1; An input described or door OR1 links to each other with the output of door AND2 with described second, another input links to each other with the output of door AND4 with the described the 4th, and output (being second switch control end K2G) described or door OR1 links to each other (as shown in Figure 2) with the control end of second switch K2.
Below specifically introduce the course of work of charging-power-supplying circuit shown in Figure 3.In the present embodiment, when described charge power supply decision circuitry 310 judges that charge power supply accesses described portable power source, the mode control signal mod output high level (the first logic level) of its output, described charging control circuit 320 is enabled, drive signal according to the voltage of charge node VCHG and the voltage of battery node VBAT by KA2 end output the first charging by described charging control circuit 320, drive signal by KA3 end output the second charging.When described charge power supply decision circuitry 310 judges that charge power supply does not access described portable power source, the mode control signal mod output low level (the second logic level) of its output, described power-supplying circuit 330 is enabled, drive signal according to the voltage of supply node VSYS and the voltage of battery node VBAT by KB1 end output the first power supply by described power-supplying circuit 330, drive signal by KB2 end output the second power supply.With door AND1 ~ AND4, inverter INV1 and or door OR1 consist of a logic and select circuit, it can be realized when mode control signal mod is high level, the first switch control end K1G output low level signal, so that the first K switch 1 is in off state always, simultaneously, second switch control end K2G selects output the first charging to drive signal KA2, and the 3rd switch control end K3G selects output the second charging to drive signal KA3, with control second switch K2 and the 3rd K switch 3 alternate conduction.When mode control signal mod is low level, the 3rd switch control end K3G output low level signal, so that the 3rd K switch 3 is in off state always, simultaneously described the first switch control end K1G selects output the first power supply to drive signal KB1, second switch control end K2G selects output the second power supply to drive signal KB2, to control the first K switch 1 and second switch K2 alternate conduction.
In the above-mentioned example, each K switch 1, K2 and K3 end during high level in K1G, K2G, conducting when K3G is low level.In other embodiments, also can be in the cut-off of high level conducting, low level, the corresponding logic of various piece changed get final product.
In sum, when the portable power source in the utility model is operated in charge mode, form the switching mode charging circuit by charging-power-supplying circuit, second switch K2, the 3rd K switch 3, inductance L 1, capacitor C 2 and capacitor C 3, so that the charging process of battery BAT is controlled.When portable power source is operated in powering mode, form power supply circuits by charging-power-supplying circuit, the first K switch 1, second switch K2, inductance L 1, capacitor C 1 and capacitor C 2, so that the power supply process of battery BAT is controlled.Charging circuit and the multiplexing second switch K2 of power supply circuits, inductance L 1 and capacitor C 2 that described portable power source forms, therefore, the portable power source in the utility model has been saved peripheral components, its cost.Simultaneously, because wherein charging circuit is the switching mode charging circuit, therefore, the portable power source in the utility model has efficient charge mode.
Enabling expression in the utility model makes its work, disable represent to make it not work.
Above-mentioned explanation has fully disclosed embodiment of the present utility model.It is pointed out that and be familiar with the scope that any change that the person skilled in art does embodiment of the present utility model does not all break away from claims of the present utility model.Correspondingly, the scope of claim of the present utility model also is not limited only to previous embodiment.
Claims (8)
1. a portable power source is characterized in that, it comprises battery, inductance L 1, capacitor C 2, the first switch, second switch, the 3rd switch and charging-power-supplying circuit,
Battery is connected between battery node and the ground, the first switch is connected between supply node and the intermediate node, inductance L 1 is connected between intermediate node and the battery node, capacitor C 2 is connected between battery node and the ground, second switch is connected between intermediate node and the ground, and the 3rd switch is connected between intermediate node and the charge node;
When charge power supply linked to each other with charge node, described charging-power-supplying circuit was controlled the first switch and is turn-offed, and control second switch and the 3rd switch alternate conduction; When charge power supply did not link to each other with charge node, described charging-power-supplying circuit was controlled the 3rd switch and is turn-offed, and controls the first switch and second switch alternate conduction.
2. portable power source according to claim 1 is characterized in that, described charging-power-supplying circuit comprises charge power supply decision circuitry, switching mode charging control circuit and switching mode power-supplying circuit,
Described charge power supply decision circuitry judges according to the voltage of charge node whether charge power supply links to each other with described charge node, and the output mode control signal;
When charge power supply links to each other with charge node, described mode control signal is controlled the first switch and is turn-offed, the described switching mode power-supplying circuit of disable enables described switching mode charging control circuit, by described switching mode charging control circuit control second switch and the 3rd switch alternate conduction;
When charge power supply does not link to each other with charge node, described mode control signal is controlled the 3rd switch and is turn-offed, the described switching mode charging control circuit of disable enables described switching mode power-supplying circuit, controls the first switch and second switch alternate conduction by described switching mode power-supplying circuit.
3. portable power source according to claim 2 is characterized in that, is connected with capacitor C 3 between charge node and ground, is connected with C1 between supply node and ground,
When charge power supply linked to each other with charge node, described charging-power-supplying circuit, second switch, the 3rd switch, inductance L 1, capacitor C 2 and capacitor C 3 formed the switching mode charging circuit, and this moment, charge power supply was charged to battery by this switching mode charging circuit,
When charge power supply links to each other with charge node, described charging-power-supplying circuit, the first switch, second switch, inductance L 1, capacitor C 1 and capacitor C 2 form the switching mode power supply circuits, and this moment, battery was powered by these switching mode power supply circuits pair system that is powered that links to each other with supply node.
4. portable power source according to claim 3, it is characterized in that, after described switching mode charging control circuit is enabled, described switching mode charging control circuit drives signal and the second charging driving signal according to the voltage of charge node and Voltage-output first charging of battery node, with control second switch and the 3rd switch alternate conduction;
After described switching mode power-supplying circuit is enabled, described switching mode power-supplying circuit drives signal and the second power supply driving signal according to the voltage of supply node and Voltage-output first power supply of battery node, to control the first switch and second switch alternate conduction.
5. portable power source according to claim 2, it is characterized in that, described charge power supply decision circuitry compares voltage and a reference voltage of described charge node, and when the voltage of charge node during greater than reference voltage, the mode control signal of its output is the first logic level; When the voltage of charge node during less than reference voltage, the mode control signal of its output is the second logic level.
6. portable power source according to claim 5, it is characterized in that, described charge power supply decision circuitry is a hysteresis comparator, the positive input of this hysteresis comparator links to each other with described charge node, its negative-phase input links to each other with described reference voltage, its output is exported described mode control signal, and when the voltage of charge node during greater than reference voltage, the saltus step of hysteresis comparator delayed mode control signal is the time of the first logic level.
7. portable power source according to claim 5 is characterized in that, described reference voltage is the voltage of battery node.
8. arbitrary described portable power source is characterized in that according to claim 2-7,
When charge power supply linked to each other with charge node, the sense of current of inductance L 1 flowed to battery node by intermediate node; When charge power supply did not link to each other with charge node, the inductive current direction flowed to intermediate node by battery node.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205898987U CN202906525U (en) | 2012-11-09 | 2012-11-09 | A mobile power supply |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205898987U CN202906525U (en) | 2012-11-09 | 2012-11-09 | A mobile power supply |
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| CN202906525U true CN202906525U (en) | 2013-04-24 |
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|---|---|---|---|
| CN2012205898987U Withdrawn - After Issue CN202906525U (en) | 2012-11-09 | 2012-11-09 | A mobile power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202906525U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102957191A (en) * | 2012-11-09 | 2013-03-06 | 无锡中星微电子有限公司 | Mobile power supply |
-
2012
- 2012-11-09 CN CN2012205898987U patent/CN202906525U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102957191A (en) * | 2012-11-09 | 2013-03-06 | 无锡中星微电子有限公司 | Mobile power supply |
| CN102957191B (en) * | 2012-11-09 | 2014-11-26 | 无锡中星微电子有限公司 | Mobile power supply |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130424 Effective date of abandoning: 20141126 |
|
| RGAV | Abandon patent right to avoid regrant |