CN204145000U - The adjustable charging circuit of charging current and there is the electronic product of this charging circuit - Google Patents
The adjustable charging circuit of charging current and there is the electronic product of this charging circuit Download PDFInfo
- Publication number
- CN204145000U CN204145000U CN201420537301.3U CN201420537301U CN204145000U CN 204145000 U CN204145000 U CN 204145000U CN 201420537301 U CN201420537301 U CN 201420537301U CN 204145000 U CN204145000 U CN 204145000U
- Authority
- CN
- China
- Prior art keywords
- charging
- current
- circuit
- electronic product
- resistance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The utility model discloses the adjustable charging circuit of a kind of charging current and there is the electronic product of this charging circuit, comprise the control circuit that power input interface, charging management chip, rechargeable battery and the operating state according to electronic product produce corresponding state signal; Described charging management chip receives the supply current of power input interface input, and to export charging current be rechargeable battery charging; The electric current of the charging current that described charging management chip is provided with for regulating it to export arranges pin, arrange on pin at electric current and be connected with variable resistance circuit, power input interface described in connection and control circuit, receive charge mode signal and status signal and be linked into described electric current arrange resistance on pin to change.The utility model decides according to the current operating state of electronic product and selected charge mode the size of current that supply current is assigned to different path, is ensureing, under the prerequisite that product normally works, to achieve the Appropriate application of power supply.
Description
Technical field
The utility model belongs to charging circuit technical field, specifically, relates to a kind of charging current that can export charging circuit and realizes the circuit design automatically regulated and the electronic product adopting this charging circuit to design.
Background technology
Society, portable hand-held electronic product is developed rapidly and popularizes rapidly, in order to strengthen the experience effect of user to this electronic product, most of hand-held class of electronic devices and Portable movable POS are all configured with rechargeable battery, and in order to extend the cruising time of electronic product, the capacity of rechargeable battery also designs increasing.The use be introduced in as electronic product of rechargeable battery provides easily simultaneously, also the power supply circuits of electronic product are made to there occurs change, under electronic product is in open state, the supply current of outside input should meet mainboard in electronic product and normally to work required operating current, also to provide charging current for battery simultaneously, meet the charging requirement of battery.
Owing to being limited by the impact of input line powering current capacity, just creating electronic product mainboard electricity consumption and battery under start running status and charge and fight for the phenomenon of supply current resource.Such as: when using computer to be powered for electronic product by USB cable, the current output capability of computer is generally at about 500mA, and general PAD product, its starup current is often greater than 500mA, so when using computer to power for electronic product, just can not ensure both to have charged to the battery of interiors of products, the need for electricity of interiors of products motherboard circuit can be met again.In this case, if the comparision of quantity of electricity of battery is little, so most of supply current can flow to battery, is battery charging, only has fraction current direction mainboard, for the load circuit on mainboard is powered.Now, the load circuit on mainboard works after occurring starting shooting or to start shooting because the supply current of input is less the problem such as abnormal.Even if use the larger power supply adaptor of charging current to power, in order to ensure that electronic product can normally work, the distribution deciding input current according to the different operating state of electronic product is also needed to move towards problem.
Summary of the invention
The purpose of this utility model is to provide a kind of charging current adjustable charging circuit, automatically the whereabouts of the supply current being input to electronic product can be distributed according to the operating state of electronic product and selected charge mode, while guarantee electronic product normally works, maximally utilise the current resources of input, for the battery of electronic product inside charges.
In order to solve the problems of the technologies described above, the utility model is achieved by the following technical solutions:
The adjustable charging circuit of a kind of charging current, comprises the control circuit that power input interface, charging management chip, rechargeable battery and the operating state according to electronic product produce corresponding state signal; Described charging management chip receives the supply current of power input interface input, and to export charging current be the charging of described rechargeable battery; The electric current of the charging current that described charging management chip is provided with for regulating it to export arranges pin, arrange on pin at described electric current and be connected with variable resistance circuit, power input interface described in described variable resistance circuit connects and control circuit, receive charge mode signal and described status signal and be linked into described electric current arrange resistance on pin to change.
Further, multiple resistance and at least two switch elements are provided with in described variable resistance circuit, the electric current that wherein a part of switch element selects a part of resistance to be linked into described charging management chip under the control of described charge mode signal arranges pin, and the electric current that a part of switch element selects other a part of resistance to be linked into described charging management chip under the control of described status signal in addition arranges pin.
Preferably, described resistance is provided with three, described switch element is provided with two, the electric current that one of them resistance is connected to described charging management chip arranges between pin and ground, the electric current that two other resistance one end connects described charging management chip arranges pin, and the other end is respectively by the switch ways ground connection of two switch elements.
As a kind of preferred version of described switch element, N-channel MOS pipe can be selected as described switch element, power input interface described in the grid of described metal-oxide-semiconductor is connected or control circuit, charge mode signal described in reception or status signal, the resistance described in drain electrode connection of metal-oxide-semiconductor, source ground.By controlling different metal-oxide-semiconductor conductings, the electric current that a connected road resistance is linked into charging management chip can be arranged pin, change thus and be linked into the resistance that electric current arranges the effective resistance on pin, and then reach the object of the charging current regulating charging management chip to export.
In order to make the supply current inputted by power input interface while charging for rechargeable battery, the work requirements of electronic product can also be met, in described electronic product, be provided with the motherboard circuit controlling electronic product and run, the power supply interface of described motherboard circuit receives the supply current of described power input interface input.
In order to ensure the correct flow direction of supply current, between described power input interface and the power supply interface of motherboard circuit, be connected with the anti-back biased diode preventing supply current from flowing backwards.
In order to meet rechargeable battery when accessing without externally fed electric current, being the requirement that motherboard circuit is powered, the power supply interface of described motherboard circuit being connected the positive pole of rechargeable battery by two-way P channel MOS tube; Wherein, the source electrode of the one P channel MOS tube connects the power supply interface of described motherboard circuit, the drain electrode of drain electrode connection the 2nd P channel MOS tube, the source electrode of the 2nd P channel MOS tube connects the positive pole of described rechargeable battery, the grid of two-way P channel MOS tube is by after a current-limiting resistance, power input interface described in one tunnel connects, separately leads up to another current-limiting resistance ground connection.
For different electronic products, its power input interface may be provided with a road, also may be provided with two-way.When described power input interface is provided with a road, described power input interface can pass through the external computer of USB charging wire or charging adapter, charge mode signal described in described power input interface generates according to external charging device type, i.e. computer charge mode or adaptor charge pattern.When described power input interface is provided with two-way, a road is used for circumscribed USB charging wire, and another road is charging base interface, and the charge mode signal described in being generated by described charging base interface, whether namely current is a mold filling formula.
Based on the structural design of the adjustable charging circuit of above-mentioned charging current, the utility model also proposed a kind of electronic product adopting described charging circuit to design, and comprises the control circuit that power input interface, charging management chip, rechargeable battery and the operating state according to electronic product produce corresponding state signal; Described charging management chip receives the supply current of power input interface input, and to export charging current be the charging of described rechargeable battery; The electric current of the charging current that described charging management chip is provided with for regulating it to export arranges pin, arrange on pin at described electric current and be connected with variable resistance circuit, power input interface described in described variable resistance circuit connects and control circuit, receive charge mode signal and described status signal and be linked into described electric current arrange resistance on pin to change.Described charging management chip arranges resistance size on pin according to being linked into its electric current, changes the size that it exports the charging current of rechargeable battery to, so to supply current be assigned to various flows to the size of branch current realize automatic governing.
Compared with prior art, advantage of the present utility model and good effect are: charging circuit of the present utility model takes into full account the operating state that electronic product is current and selected charge mode, decide the size of current that supply current is assigned to different path, the electric current sendout in other paths is regulated by changing the size being input to the charging current of battery, solve the assignment problem of electronic product supply current under different conditions thus, ensureing under the prerequisite that electronic product can normally work, can be battery charging as soon as possible, achieve the Appropriate application of power supply, improve the Product Experience effect of user, and it is low and insert charging wire electronic product when battery electric quantity is lower and may to work the abnormal problem even not driving machine to efficiently solve electronic product charging resource utilization, improve stability and the reliability of electronic product operation.
After reading the detailed description of the utility model execution mode by reference to the accompanying drawings, other features of the present utility model and advantage will become clearly.
Accompanying drawing explanation
Fig. 1 is the schematic block circuit diagram of a kind of embodiment of the charging circuit that the utility model proposes;
Fig. 2 is the circuit theory diagrams of a kind of embodiment that in the charging circuit that proposes of the utility model, power input part divides;
Fig. 3 is the circuit theory diagrams of a kind of embodiment of charging current administrative section in the charging circuit that proposes of the utility model.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in more detail.
The utility model is in order to solve current PAD, smart mobile phone, PADPOS(is with the electronic product of PAD function and POS consumption function), the portable type electronic products such as handheld POS machine cannot realize controlling to the supply current being linked into its inside, even if thus cause electronic product to plug charging wire when battery electric quantity is too low, electronic product also cannot be started shooting or start shooting the problem of operation irregularity at once, propose a kind of by changing the size being input to the charging current of rechargeable battery, allocate the magnitude of current that supply current is assigned to other paths, and then reach under electronic product is in start or running status, reduce the magnitude of current that supply current is assigned to rechargeable battery, to ensure the normal electricity consumption of the inner motherboard circuit of electronic product, and when electronic product is under shutdown or holding state, controls supply current and flow mostly to rechargeable battery, be battery charging, the charging rate of battery can be accelerated thus as much as possible, shorten the charging interval of battery, utilize charging resource substantially, improve the serviceability of product.
In order to realize the automatic adjustment to the charging current being input to rechargeable battery, the utility model carries out specialized designs to the charging circuit of electronic product inside, by building special circuit to realize the reasonable distribution of charging current under electronic product is in different conditions.
Below by a specific embodiment, elaborate concrete assembling structure and the operation principle thereof of described charging circuit.
Embodiment one, shown in Figure 1, the charging circuit of the present embodiment is primarily of part compositions such as power input interface, charging management chip, rechargeable battery, variable resistance circuit and control circuits.Wherein, power input interface can be arranged on the shell of electronic product, for receiving the supply current of external powering device input.In the present embodiment, described power input interface can only arrange a road, such as USB interface or Mini_USB interface, circumscribed USB charging wire, computer or charging adapter is connected by USB charging wire, utilize outside computer or special charging adapter to be that described electronic product is powered, and be the rechargeable battery charging accumulation of energy of electronic product inside.When selecting charging adapter to power to described electronic product, particular arrangement can be carried out to the differential data pin in the USB interface of charging adapter side, to realize the automatic identification of electronic product to current selected charge mode, generate charge mode signal Enough_Power_IN, transfer to the late-class circuit of electronic product inside.Certainly, described power input interface also can arrange two-way, and a road is the interface for external charge line, as USB interface or Mini_USB interface etc.; Another road is charging base interface, for charging base grafting, realize A seating charging.When adopting the configuration mode of this power input interface, can generate by charging base interface the charge mode signal Enough_Power_IN representing current selected charger type, transferring to the late-class circuit of electronic product inside.Owing to being prior art to the identification division of external charger type, therefore, the present embodiment does not elaborate at this.
Supply current is shunted after being input to electronic product by power input interface, and a road transfers to charging management chip, charges for the rechargeable battery for electronic product inside; Another road transfers to motherboard circuit, for the load circuit on mainboard is powered.In the present embodiment, described charging management chip is the integrated chip that a charging current that can export it controls, include electric current and pin ISET is set, be linked into electric current by changing resistance value on pin ISET is set, the size of the charging current exported by charging management chip can be regulated.
Be linked into electric current arrange resistance value on pin ISET to change, the present embodiment has additional variable resistance circuit in described charging circuit, and the electric current connecting charging management chip arranges pin ISET.Consider that electronic product is being in (under such as shutdown or blank screen holding state and under start running status) under different operating states, operating current needed for its motherboard circuit is different, and when the charge mode selected by electronic product is different, the situation that the size of the supply current of electronic product is also inconsistent can be supplied to, in order to ensure that electronic product can under the prerequisite normally run of complete machine, accelerate the charging rate of battery as far as possible, realize the Appropriate application of charging resource, the corresponding state signal PMIC_STBY_REQ that the present embodiment utilizes charge mode signal Enough_Power_IN and the electronic product internal control circuit operating state current according to electronic product to produce carrys out co-controlling variable resistance circuit, the electric current that achieves a butt joint arranges the reasonable disposition of the resistance value on pin ISET.
By changing the size of charging current, the operating current be dispensed on motherboard circuit can be made to change, thus meet the need for electricity that motherboard circuit normally runs.
Below in conjunction with Fig. 2 and Fig. 3, the physical circuit assembling structure of the charging circuit of the present embodiment is described in detail.
Fig. 2 is the circuit theory that in described charging circuit, power input part divides, and is described to arrange two-way power input interface.Wherein, USB_PWR_IN is the power pins of USB interface or Mini_USB interface, can pass through the external computer of USB charging wire, utilizes computer to charge for electronic product.VCC_5V_DZ is the power pins of charging base interface, when adopting charging base to charge to electronic product, receives the power supply that charging base provides.By the power supply by pin USB_PWR_IN or pin VCC_5V_DZ access respectively by diode D1 or D2, and under the filter action of electric capacity C1, C2, a road transfers to the charging current administrative section shown in Fig. 2, for being battery charging; Another road transfers to the power supply interface VCC_OUT of motherboard circuit via anti-back biased diode D3 and filter capacitor C3, C4, for the motherboard circuit of electronic product inside is powered.
In Fig. 2, XS1 is battery socket, and for grafting rechargeable battery, this socket comprises two positive pole VCCLi1, VCCLi2, two negative poles G1, G2 and a temperature detection pin Li_NTC.Wherein, two positive poles VCCLi1, VCCLi2, when rechargeable battery is inserted in battery socket XS1, connect with the positive pole V_LI of battery, and when electronic product does not have external charge device, the power supply utilizing battery to export is powered for motherboard circuit.
In order to ensure battery only when electronic product does not have external charge device, just out-put supply is that motherboard circuit is powered, the present embodiment arranges two P channel MOS tubes Q1, Q2 between positive pole VCCLi1, VCCLi2 and the power supply interface VCC_OUT of motherboard circuit of battery socket XS1, and described two P channel MOS tubes Q1, Q2 are to design use as the switching characteristic of battery feed circuit.The source electrode of P channel MOS tube Q1 is connected the power supply interface VCC_OUT of motherboard circuit, drain electrode connects the drain electrode of P channel MOS tube Q2, the source electrode of P channel MOS tube Q2 connects positive pole VCCLi1, VCCLi2 of battery socket XS1, by two P channel MOS tube Q1, Q2 grids by resistance R3, R2 ground connection, the intermediate node of two resistance R3, R2 connects power input interface USB_PWR_IN, VCC_5V_DZ or is communicated with power input interface USB_PWR_IN, VCC_5V_DZ via diode D1, D2.
Time under electronic product is in charge mode, the power supply of access transfers to the grid of P channel MOS tube Q1, Q2 via resistance R3, and control P channel MOS tube Q1, Q2 are in cut-off state, and now battery is in charged state.When electronic product does not have external charge device, the grid potential of P channel MOS tube Q1, Q2 is low, metal-oxide-semiconductor Q2 enters saturation conduction state, the power supply exported by battery transfers to the power supply interface VCC_OUT of motherboard circuit, for motherboard circuit is powered via the bypass diode of the source electrode of P channel MOS tube Q2, drain electrode and P channel MOS tube Q1.Adopt battery be motherboard circuit power time, anti-back biased diode D3 can prevent the electric current reverse transfer exported by battery to charging management chip and power input interface, to ensure the correct flow direction of electric current.
Two negative poles G1, G2 of battery socket XS1, when rechargeable battery is inserted in battery socket XS1, connect with the negative pole V_LI of battery, and with being systematically connected of electronic product.The temperature detection pin Li_NTC of battery socket XS1 is for exporting the detection signal representing battery Current Temperatures; specifically can transfer to the detection pin TS of charging management chip U29, shown in composition graphs 3, with when battery temperature is too high; stop, to battery charging, realizing the overtemperature protection to battery.
In addition; in order to prevent by the too high faulty operation of power input interface input voltage; the present embodiment divides at described power input part and is also provided with Transient Suppression Diode TVS2, and between the negative electrode being connected to diode D1, D2 and ground, available protecting motherboard circuit is not burned.
Fig. 3 is the circuit theory diagrams of charging current administrative section in charging circuit, comprises charging management chip U29 and variable resistance circuit.Wherein, the supply current BQ24250_IN of charging management chip U29 is branched to via after ground capacity C8, C9 filtering by power input interface, transfer to the input IN of charging management chip U29, export the positive pole V_LI of charging current to rechargeable battery by output BAT1, BAT2 of charging management chip U29.In Fig. 3, electric capacity C12 can play the effect of filtering to charging current.
In the present embodiment, described variable resistance circuit can adopt multiple resistance and at least two switch elements to set up and form, wherein a part of switch element connects power input interface VCC_5V_DZ, and the electric current selecting a part of resistance to be linked into charging management chip U29 under the control of charge mode signal Enough_Power_IN arranges pin ISET; A part of switch element connection control circuit in addition, the electric current selecting other a part of resistance to be linked into described charging management chip U29 under the control of the status signal PMIC_STBY_REQ of control circuit output arranges pin ISET.Here it should be noted that, although the transmission line of charge mode signal Enough_Power_IN is connected to power input interface VCC_5V_DZ by the present embodiment, but be not limit described charge mode signal Enough_Power_IN only to change its level state when base charger accesses, when external charge adapter, the level state of described charge mode signal Enough_Power_IN can be changed equally by charging adapter.
As a kind of decision design mode of variable resistance circuit, described resistance preferably arranges three, such as resistance R12, R13, R14, and described switch element preferably arranges two, such as N-channel MOS pipe Q3, Q4.The electric current one of them resistance R12 being connected directly between described charging management chip U29 arranges between pin ISET and ground, the electric current that two other resistance R13, R14 one end connects described charging management chip U29 arranges pin ISET, the other end is respectively by the switch ways ground connection of two switch elements, such as the other end of resistance R13 is connected the drain electrode of N-channel MOS pipe Q3, by the source ground of N-channel MOS pipe Q3, grid connects power input interface VCC_5V_DZ, receive charge mode signal Enough_Power_IN, and through pull down resistor R16 ground connection; The other end of resistance R14 is connected the drain electrode of N-channel MOS pipe Q4, by the source ground of N-channel MOS pipe Q4, grid passes through current-limiting resistance R15 connection control circuit, the status signal PMIC_STBY_REQ that reception control circuit exports, and through pull down resistor R17 ground connection.
Certainly, described switch element also can adopt other components and parts with switching characteristic except metal-oxide-semiconductor to carry out the establishment design of variable resistance circuit structure, and such as triode, controllable silicon etc., the present embodiment is not limited in above citing.
The present embodiment, for the different operating state of electronic product and selected different charge modes, arranges four kinds of charged states, namely preferentially under small area analysis (such as USB charging wire) condition of power supply ensures that electronic product normally works electricity consumption; If electronic product be in shutdown or blank screen holding state under again give powered battery; Under big current (such as charging adapter, charging base) powering mode, if under electronic product is in start running status, then distribute enough electric currents by control circui and first ensure that electronic product can normally work, its aftercurrent is reallocated and to be charged to battery; If under electronic product is in standby or off-mode, then current convergence is distributed and charge the battery.
Below for above-mentioned four kinds of charged states, the operation principle of the charging circuit of the present embodiment is specifically addressed.
1, under electronic product is in shutdown or blank screen holding state, the mode of circumscribed USB charging wire is adopted to charge.
In this case, power supply is introduced by USB charging wire, and wherein one part of current is powered directly to motherboard circuit through anti-back biased diode D3, and one part of current transfers to charging management chip U29 in addition, for being battery charging.Now, under motherboard circuit is operated in standby or off-mode, the electric current therefore consumed is very little, powers without the need to big current, most of supply current can be distributed to battery, is battery charging, to shorten the charging interval.In order to reach this purpose of design, the present embodiment arranges charge mode signal Enough_Power_IN when electronic product adopts the mode of circumscribed USB charging wire to charge, and is set to low level, controls N-channel MOS pipe Q3 cut-off; And control circuit configuration state signal PMIC_STBY_REQ when motherboard circuit is operated under standby or off-mode is high level, control N-channel MOS pipe Q4 conducting, make resistance R14 ground connection, and then electric current resistance R14 being linked into charging management chip U29 arranges pin ISET.
If suppose resistance R12 over the ground conducting time, the charging current exported by charging management chip U29 is I2; Resistance R14 over the ground conducting time, the charging current exported by charging management chip U29 is I1, the charging current being now then rechargeable battery output by charging management chip U29 is I1+I2, has both taken into account the charging ability of external USB charging device, and can accelerate again the charging rate of battery as far as possible.
2, under electronic product is in shutdown or blank screen holding state, the mode of charging base or charging adapter is adopted to charge.
In this case, power supply is provided by charging base or charging adapter, has higher electric current deliverability.To wherein power directly to motherboard circuit through anti-back biased diode D3 by a part of supply current, one part of current transfers to charging management chip U29 in addition, for being battery charging.Now, under motherboard circuit is operated in standby or off-mode, the electric current therefore consumed is very little, can strengthen charging current further, to accelerate the charging rate of battery.In order to reach this purpose of design, the present embodiment arranges charge mode signal Enough_Power_IN when electronic product adopts A seating charging or charging adapter charging modes, be set to high level, control N-channel MOS pipe Q3 saturation conduction, make resistance R13 ground connection.Now, under motherboard circuit is operated in standby or off-mode, therefore status signal PMIC_STBY_REQ is still high level, N-channel MOS pipe Q4 conducting, resistance R14 ground connection, the electric current of charging management chip U29 arranges pin ISET by resistance R12, R13, R14 ground connection in parallel.
If suppose resistance R13 over the ground conducting time, the charging current exported by charging management chip U29 is I3, the charging current being now then rechargeable battery output by charging management chip U29 is I1+I2+I3, has both met the need for electricity of motherboard circuit, and has achieved again the quick charge of battery.
3, under electronic product is in start running status, the mode of circumscribed USB charging wire is adopted to charge.
In this case, power supply is introduced by USB charging wire, and the providing capability of supply current is limited, and now motherboard circuit needs larger operating current.In order to ensure that motherboard circuit can run by normal table, first should ensure the power supply of motherboard circuit, reducing the size of charging current, to sacrifice charging rate to exchange the normal work of electronic product for.In order to reach this purpose of design, it is low level that the present embodiment arranges control circuit configuration state signal PMIC_STBY_REQ when motherboard circuit is operated under start running status, control N-channel MOS pipe Q4 cut-off, now, because charge mode signal Enough_Power_IN is low level, thus control N-channel MOS pipe Q3 cut-off, then make the electric current of charging management chip U29 that pin ISET is set by means of only resistance R12 ground connection, namely the charging current being rechargeable battery output by charging management chip U29 is I2, the size of I2 can set according to the actual electricity consumption situation of motherboard circuit, this kind of state can ensure to provide enough operating currents to mainboard.
4, under electronic product is in start running status, the mode of charging base or charging adapter is adopted to charge.
In this case, power supply is provided by charging base or charging adapter, has higher electric current deliverability.Now, status signal PMIC_STBY_REQ still keeps low level, and charge mode signal Enough_Power_IN becomes high level, therefore N-channel MOS pipe Q3 conducting, N-channel MOS pipe Q4 ends, the electric current of charging management chip U29 arranges pin ISET by parallel resistance R12, R13 ground connection, making by charging management chip U29 is that the charging current that rechargeable battery exports becomes I2+I3 sum, while meeting the need for electricity that motherboard circuit normally works, strengthen the charging current of battery, to shorten the charging interval.
The charging circuit of the present embodiment can regulate the distribution whereabouts of supply current neatly, control battery charge, while effectively ensure that electronic product normally works, also the maximized utilance that improve charging resource, improves the serviceability of electronic product.
The charging circuit configuration of the present embodiment is simple, easy to operate, is easy to realize, can be widely used in all portable hand-held electronic product such as PAD, smart mobile phone, PADPOS, handheld POS machine, improve the experience effect of user.
Certainly; above-mentioned explanation is not to restriction of the present utility model; the utility model is also not limited in above-mentioned citing, the change that those skilled in the art make in essential scope of the present utility model, remodeling, interpolation or replacement, also should belong to protection range of the present utility model.
Claims (10)
1. the adjustable charging circuit of charging current, comprise the control circuit that power input interface, charging management chip, rechargeable battery and the operating state according to electronic product produce corresponding state signal, described charging management chip receives the supply current of power input interface input, and to export charging current be the charging of described rechargeable battery; It is characterized in that: the electric current of the charging current be provided with for regulating it to export on described charging management chip arranges pin, arrange on pin at described electric current and be connected with variable resistance circuit, power input interface described in described variable resistance circuit connects and control circuit, receive charge mode signal and described status signal and be linked into described electric current arrange resistance on pin to change.
2. the adjustable charging circuit of charging current according to claim 1, it is characterized in that: in described variable resistance circuit, be provided with multiple resistance and at least two switch elements, the electric current that wherein a part of switch element selects a part of resistance to be linked into described charging management chip under the control of described charge mode signal arranges pin, and the electric current that a part of switch element selects other a part of resistance to be linked into described charging management chip under the control of described status signal in addition arranges pin.
3. the adjustable charging circuit of charging current according to claim 2, it is characterized in that: described resistance is provided with three, described switch element is provided with two, the electric current that one of them resistance is connected to described charging management chip arranges between pin and ground, the electric current that two other resistance one end connects described charging management chip arranges pin, and the other end is respectively by the switch ways ground connection of two switch elements.
4. the adjustable charging circuit of charging current according to claim 3, it is characterized in that: described switch element is N-channel MOS pipe, the power input interface described in grid connection of described metal-oxide-semiconductor or control circuit, charge mode signal described in reception or status signal, the resistance described in drain electrode connection of metal-oxide-semiconductor, source ground.
5. the adjustable charging circuit of charging current according to any one of claim 1 to 4, it is characterized in that: in described electronic product, be provided with the motherboard circuit controlling electronic product and run, the power supply interface of described motherboard circuit receives the supply current of described power input interface input.
6. the adjustable charging circuit of charging current according to claim 5, is characterized in that: between described power input interface and the power supply interface of motherboard circuit, be connected with the anti-back biased diode preventing supply current from flowing backwards.
7. the adjustable charging circuit of charging current according to claim 5, is characterized in that: the power supply interface of described motherboard circuit connects the positive pole of rechargeable battery by two-way P channel MOS tube; Wherein, the source electrode of the one P channel MOS tube connects the power supply interface of described motherboard circuit, the drain electrode of drain electrode connection the 2nd P channel MOS tube, the source electrode of the 2nd P channel MOS tube connects the positive pole of described rechargeable battery, the grid of two-way P channel MOS tube is by after a current-limiting resistance, power input interface described in one tunnel connects, separately leads up to another current-limiting resistance ground connection.
8. the adjustable charging circuit of charging current according to any one of claim 1 to 4, it is characterized in that: described power input interface is provided with a road, by the external computer of USB charging wire or charging adapter, the charge mode signal described in described power input interface generates according to external charging device type.
9. the adjustable charging circuit of charging current according to any one of claim 1 to 4, it is characterized in that: described power input interface is provided with two-way, one tunnel is used for circumscribed USB charging wire, another road is charging base interface, the charge mode signal described in being generated by described charging base interface.
10. there is an electronic product for charging circuit, it is characterized in that: described charging circuit is the adjustable charging circuit of charging current as claimed in any one of claims 1-9 wherein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420537301.3U CN204145000U (en) | 2014-09-18 | 2014-09-18 | The adjustable charging circuit of charging current and there is the electronic product of this charging circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420537301.3U CN204145000U (en) | 2014-09-18 | 2014-09-18 | The adjustable charging circuit of charging current and there is the electronic product of this charging circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204145000U true CN204145000U (en) | 2015-02-04 |
Family
ID=52421665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420537301.3U Active CN204145000U (en) | 2014-09-18 | 2014-09-18 | The adjustable charging circuit of charging current and there is the electronic product of this charging circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204145000U (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106385067A (en) * | 2016-09-27 | 2017-02-08 | Tcl通讯（宁波）有限公司 | Double-battery-based charging system, method and mobile terminal |
| CN106451616A (en) * | 2016-09-27 | 2017-02-22 | Tcl通讯（宁波）有限公司 | Mobile terminal, and dual battery charging switching circuit, system and method thereof |
| CN106786869A (en) * | 2016-12-16 | 2017-05-31 | 深圳市亿道数码技术有限公司 | A kind of charging automatic identification switching circuit |
| CN107546814A (en) * | 2017-10-16 | 2018-01-05 | 歌尔科技有限公司 | A kind of charging base and electronic product |
| CN109149737A (en) * | 2018-08-24 | 2019-01-04 | 广东南控电力有限公司 | A kind of power source charges electric system |
| CN109586363A (en) * | 2018-11-15 | 2019-04-05 | 上海移远通信技术股份有限公司 | A kind of charging circuit |
| CN109980702A (en) * | 2017-12-27 | 2019-07-05 | 南京工程学院 | A kind of energy conservation loss-prevention charger baby |
| CN111969168A (en) * | 2019-05-20 | 2020-11-20 | Oppo广东移动通信有限公司 | Battery pack and electronic device |
| CN112018830A (en) * | 2019-05-28 | 2020-12-01 | Oppo广东移动通信有限公司 | Charging and discharging system and mobile terminal |
| CN112421719A (en) * | 2020-11-10 | 2021-02-26 | 上海闻泰信息技术有限公司 | Double-charging control circuit and double-charging control method |
| CN112653228A (en) * | 2020-12-11 | 2021-04-13 | 山东电工电气集团新能科技有限公司 | Self-adaptive charging and discharging control system and control method for super capacitor |
| CN113098092A (en) * | 2021-04-02 | 2021-07-09 | 上海创米科技有限公司 | Power supply method and charging method of super capacitor |
| CN114268153A (en) * | 2021-12-24 | 2022-04-01 | 广州星际悦动股份有限公司 | Charging control circuit, charging control method, charging control device, and storage medium |
-
2014
- 2014-09-18 CN CN201420537301.3U patent/CN204145000U/en active Active
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106451616A (en) * | 2016-09-27 | 2017-02-22 | Tcl通讯（宁波）有限公司 | Mobile terminal, and dual battery charging switching circuit, system and method thereof |
| CN106385067A (en) * | 2016-09-27 | 2017-02-08 | Tcl通讯（宁波）有限公司 | Double-battery-based charging system, method and mobile terminal |
| CN106786869A (en) * | 2016-12-16 | 2017-05-31 | 深圳市亿道数码技术有限公司 | A kind of charging automatic identification switching circuit |
| CN107546814A (en) * | 2017-10-16 | 2018-01-05 | 歌尔科技有限公司 | A kind of charging base and electronic product |
| CN107546814B (en) * | 2017-10-16 | 2024-04-02 | 歌尔科技有限公司 | Charging base and electronic product |
| CN109980702A (en) * | 2017-12-27 | 2019-07-05 | 南京工程学院 | A kind of energy conservation loss-prevention charger baby |
| CN109149737A (en) * | 2018-08-24 | 2019-01-04 | 广东南控电力有限公司 | A kind of power source charges electric system |
| CN109586363B (en) * | 2018-11-15 | 2022-06-07 | 上海移远通信技术股份有限公司 | Charging circuit |
| CN109586363A (en) * | 2018-11-15 | 2019-04-05 | 上海移远通信技术股份有限公司 | A kind of charging circuit |
| CN111969168A (en) * | 2019-05-20 | 2020-11-20 | Oppo广东移动通信有限公司 | Battery pack and electronic device |
| CN112018830A (en) * | 2019-05-28 | 2020-12-01 | Oppo广东移动通信有限公司 | Charging and discharging system and mobile terminal |
| CN112018830B (en) * | 2019-05-28 | 2022-08-23 | Oppo广东移动通信有限公司 | Charging and discharging system and mobile terminal |
| CN112421719B (en) * | 2020-11-10 | 2023-01-20 | 上海闻泰信息技术有限公司 | Double-charging control circuit and double-charging control method |
| CN112421719A (en) * | 2020-11-10 | 2021-02-26 | 上海闻泰信息技术有限公司 | Double-charging control circuit and double-charging control method |
| CN112653228A (en) * | 2020-12-11 | 2021-04-13 | 山东电工电气集团新能科技有限公司 | Self-adaptive charging and discharging control system and control method for super capacitor |
| CN113098092A (en) * | 2021-04-02 | 2021-07-09 | 上海创米科技有限公司 | Power supply method and charging method of super capacitor |
| CN114268153A (en) * | 2021-12-24 | 2022-04-01 | 广州星际悦动股份有限公司 | Charging control circuit, charging control method, charging control device, and storage medium |
| CN114268153B (en) * | 2021-12-24 | 2023-12-19 | 广州星际悦动股份有限公司 | Charge control circuit, charge control method, charge control device and storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204145000U (en) | The adjustable charging circuit of charging current and there is the electronic product of this charging circuit | |
| CN201210622Y (en) | Electric core charging and discharging control management circuit for lithium ion or polymer battery | |
| CN101986508B (en) | Battery equalizing device | |
| EP4145669A1 (en) | Charging/discharging circuit and electronic device | |
| CN204131210U (en) | Power supply switch circuit and portable electric appts | |
| CN104967191A (en) | Charging circuit used for mobile power supply and mobile power supply | |
| CN204465104U (en) | A kind of portable set charging power source circuit | |
| CN202587074U (en) | Intelligent handset with double-battery power supply | |
| CN111146831A (en) | Mobile device, battery management circuit and battery management method | |
| CN105811493A (en) | Power source circuit, power source circuit discharging method, power source circuit charging method and controller | |
| CN205304393U (en) | Little incessant stand -by power supply switching circuit of consumption | |
| CN204290464U (en) | Power supply circuits and electronic equipment | |
| CN103166251B (en) | Charging circuit for standby battery | |
| CN110994769A (en) | Double-battery system and mobile terminal equipment | |
| CN104617634A (en) | Charge-discharge circuit and power bank | |
| CN204794261U (en) | A charging circuit and portable power source for portable power source | |
| CN107437828B (en) | Charging method, device and equipment | |
| CN104300605A (en) | Power circuit and control method thereof | |
| CN202634322U (en) | Photovoltaic off-connected grid, commercial network and energy storage mixing power supply system | |
| CN104767243A (en) | Charging method, charging device, charging circuit and charging system with charging circuit | |
| CN205304290U (en) | Novel mobile power supply | |
| CN104167807A (en) | RTC power source circuit of digital wireless terminal | |
| CN102468657B (en) | Charging circuit of standby battery | |
| CN204441951U (en) | A kind of charge-discharge circuit and charger baby | |
| CN104716715A (en) | Multi-battery-based power supply circuit and electronic product with power supply circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 3 building, No. 151, Zhuzhou Road, Laoshan District, Shandong, Qingdao, China Patentee after: Qingdao Hisense intelligent business systems Limited by Share Ltd Address before: 3 building, No. 151, Zhuzhou Road, Laoshan District, Shandong, Qingdao, China Patentee before: Qingdao Hisense Intelligent Commercial System Co., Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP03 | Change of name, title or address |
Address after: 266104 Qingdao wisdom Valley, No. 8, Shengshui Road, Laoshan District, Qingdao, Shandong Patentee after: Qingdao Haishi Commercial Technology Co.,Ltd. Address before: 266100, building 151, No. 3, Zhuzhou Road, Laoshan District, Shandong, Qingdao Patentee before: QINGDAO HISENSE INTELLIGENT COMMERCIAL SYSTEM CO.,LTD. |
|
| CP03 | Change of name, title or address |