CN104333086A - Charging management circuit and charger - Google Patents
Charging management circuit and charger Download PDFInfo
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- CN104333086A CN104333086A CN201410649154.3A CN201410649154A CN104333086A CN 104333086 A CN104333086 A CN 104333086A CN 201410649154 A CN201410649154 A CN 201410649154A CN 104333086 A CN104333086 A CN 104333086A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
- H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
- H02J7/0049—Detection of fully charged condition
Abstract
The invention relates to a charging management circuit and a charger. The charging management circuit comprises a charging control circuit and a state judgment circuit which are sequentially connected, and further comprises a drive circuit used to drive an external indicating device, wherein the drive circuit comprises a selection switch unit and a drive switch, a switching control end of the selection switch unit is connected with the state judgment circuit and receives state signals of the state judgment circuit, the selection switch unit is provided with at least three input ends used to receive different state representation signals, an output end of the selection switch unit is connected with an operation end of the drive circuit, and a drive end of the drive switch is connected with the external indicating device. The charger comprises an LED (light emitting diode), and the drive end of the drive switch is connected with and drives the LED. According to the charging management circuit and the charger, states of the charger are represented only through the LED, and the purposes that a system is low in cost and easy to miniaturize are achieved.
Description
Technical field
The present invention relates to a kind of charge management circuit and charger.
Background technology
Traditional charger adopts two lamp modes to show charged state.As shown in Figure 1, charge management circuit U1 is charged to battery BAT by VBAT end, drives LED 1, LED2 respectively, and then realize the display to current charged state by L1, L2 end.In the inside of described charge management circuit U1, usual two nmos switches opening Lou connected mode, connect described LED 1 and LED2 (not indicating in figure) respectively, and drive each light-emitting diode in drop-down mode, set the electric current of LED 1 and LED2 in the outside of described charge management circuit U1 respectively by resistance R1 and R2, thus the brightness of two light-emitting diodes is set.
In the whole course of work of charger, above-mentioned two light-emitting diodes can be utilized can to distinguish three kinds of states, be respectively:
(1) when charger does not access, or during VBAT terminal shortcircuit, hold the inside nmos switch be connected to be off state with L1, hold the inside nmos switch be connected to be also off state with L2, two LEDs 1 and LED2 are in OFF state.
(2) when charger accesses, and battery BAT is when being in charged state, wherein first light-emitting diode is lit luminescence (such as LED1 is the light-emitting diode glowed, now, hold the inside nmos switch be connected to be conducting state with L1, LED1 is luminance), second light-emitting diode is that OFF state is (such as LED2 is the light-emitting diode of green light, hold the inside nmos switch be connected to be still off state with L2, LED2 is still OFF state).
(3) when charger accesses, and battery be in full state time, wherein first light-emitting diode extinguishes (such as LED1 is the light-emitting diode glowed, now, hold the inside nmos switch be connected to be off state with L1, LED1 is OFF state), second light-emitting diode is lit (such as LED2 is the light-emitting diode of green light, hold the inside nmos switch be connected to be conducting state with L2, LED2 is luminance).
According to foregoing description, if adopt two or more light-emitting diode to indicate different charged states, certainly will to configure the nmos switch of respective amount, this brings higher cost undoubtedly, and each light-emitting diode need take specific volume or area, make the bulk shape of charger design be difficult to compression.
Summary of the invention
Instant invention overcomes above-mentioned shortcoming, provide a kind of charge management circuit and charger, can only use a light-emitting diode can realize the instruction of charged state.
The present invention solves the technical scheme that its technical problem takes: a kind of charge management circuit, comprise connect successively produce the charging control circuit of charging current and the status determination circuit for judging present charge state for controlling, also comprise the drive circuit for driving external indicating device, described drive circuit comprises diverter switch unit and a driving switch, the switching controls end of described diverter switch unit is connected with described status determination circuit, the input of described diverter switch unit is for accessing at least three kinds of different state representation signals, the output of described diverter switch unit is connected to the operating side of described driving switch, the drive end of described driving switch connects described external indicating device, described diverter switch unit is according to the status signal received from described status determination circuit, the state representation signal of correspondence is switched to the output of described diverter switch unit, and then make the drive end of described driving switch export corresponding drive singal.
Described diverter switch unit can comprise the diverter switch corresponding to described input quantity, described status determination circuit has the state end corresponding to described switch unit input quantity, the input of described diverter switch unit is as the input of each diverter switch, each state end correspondence respectively at described status determination circuit connects, described each diverter switch is according to the status signal received from described status determination circuit, corresponding one of them diverter switch of connection, is switched to the output of described diverter switch unit by the state representation signal of correspondence.
Described state representation signal can be at least three kinds in the triangular signal of high level signal, low level signal, the square-wave signal of one or more frequencies, one or more frequencies.
At the described low level signal as state representation signal, when described diverter switch unit is connected to the operating side of driving switch, described driving switch cut-off;
At the described high level signal as state representation signal, when described diverter switch unit is connected to the operating side of driving switch, described driving switch conducting;
At the described square-wave signal as state representation signal, when described diverter switch unit is connected to the operating side of driving switch, described driving switch switches between conducting and cut-off with corresponding frequency;
At the described triangular signal as state representation signal, when described diverter switch unit is connected to the operating side of driving switch, described driving switch provides the alternately variable-current becoming gradually greatly and diminish gradually with corresponding frequency.
Also can comprise the oscillator for exporting described state representation signal in described drive circuit, described oscillator exports the square-wave signal comprising one or more frequencies, or/and the triangular signal of one or more frequencies.
Driving switch in described drive circuit can be nmos switch, the grid of described nmos switch is as the operating side of described driving switch, the drain electrode of described nmos switch is as the drive end of described driving switch, the source electrode of described nmos switch is through a feedback resistance ground connection, one of them output of described oscillator is connected to an input of an operational amplifier, another input of described operational amplifier is connected between the source electrode of described nmos switch and described feedback resistance, the output of described operational amplifier is connected with the input of described diverter switch unit.
The charging end of described charging control circuit can be connected with sampled signal end with the charging end of described status determination circuit respectively with sampled signal end;
Described status determination circuit can comprise the first condition adjudgement unit, second condition adjudgement unit and third state judging unit, described first condition adjudgement unit comprises the first voltage comparator, current comparator and with door, the positive-negative input end of described voltage comparator connect respectively charging end and with the first reference voltage end, the positive-negative input end of described current comparator connects reference current end and described sampled signal end respectively, described first voltage comparator is connected with two inputs of door with described respectively with the output of current comparator, described is the output of the first condition adjudgement unit with the output of door, described second condition adjudgement unit comprises the second voltage comparator, the positive-negative input end of described second voltage comparator connects the second reference voltage end and described charging end respectively, and the output of described second voltage comparator is the output of described second condition adjudgement unit, described third state judging unit comprises a NOR gate, two inputs of described NOR gate connect the output of described first condition adjudgement unit and the second condition adjudgement unit respectively, and the output of described NOR gate is the output of described third state judging unit.
Described condition adjudgement unit can comprise the 4th condition adjudgement unit, described 4th condition adjudgement unit comprises tertiary voltage comparator and a timer, the positive-negative input end of described tertiary voltage comparator connects power input and the 3rd reference voltage end respectively, output connects the clock end of described timer, the output of described first condition adjudgement unit connects the reset terminal of described timer, and the output of described timer is the output of described 4th condition adjudgement unit.
Described condition adjudgement unit can comprise the 5th condition adjudgement unit, comprise tertiary voltage comparator and an inverter, the positive-negative input end of described tertiary voltage comparator connects power input and the 3rd reference voltage end respectively, output connect described inverter input, the output of described inverter is the output of the 5th condition adjudgement unit.
Have a charger for charge management circuit described in above-mentioned any one, comprise a light-emitting diode, the drive end of described driving switch connects and drives described light-emitting diode.
Described light-emitting diode also can be connected with a pull-up resistor.
In the present invention, the operating state of the charger that described drive circuit obtains according to described situation decision circuitry, and utilize diverter switch unit by state representation signal access driving switch, described driving switch is made to be operated in different operating state, and then drive external indicating device to realize different illumination modes, therefore achieve and only use an external indicating device to represent charger states, realize system cost lower, and the object that system is more easily miniaturized.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of charger in prior art;
Fig. 2 is the circuit theory diagrams of the charge management circuit in the present invention;
Fig. 3 is the circuit theory diagrams of status determination circuit in Fig. 2;
Fig. 4 is the circuit theory diagrams of drive circuit in Fig. 2;
Fig. 5 is the circuit theory diagrams of the charger with charge management circuit in Fig. 2.
Embodiment
Below in conjunction with Figure of description and specific embodiment, the solution of the present invention and principle are described, to help understanding content of the present invention.
As shown in Figure 2, be the circuit theory diagrams of a kind of preferred embodiment of charge management circuit in the present invention, comprise comprising the charging control circuit U21 connected successively, status determination circuit U22 and drive circuit U23.Described charging control circuit U21 produces and flows to charging end VBAT from power input VCHG, for the electric current charged to battery, namely described charging end VBAT connects by the battery charged, described charging end VBAT can produce and comprise precharge, constant current charge, constant voltage charge Three models, export the sampled signal of charging current simultaneously at sampled signal end Isen, export status determination circuit to.Described charging control circuit U21 can adopt existing techniques in realizing, no longer launches to describe herein.The charging end VBAT of described status determination circuit U22 and sampled signal end Isen are respectively with the charging end VBAT of described charging control circuit U21 with sampled signal end Isen is corresponding is connected.Described status determination circuit U22 has five state ends, be respectively A end, B end, C end, D end and E end, and hold respectively at five state end A of described drive circuit U23, B end, C end, D end be connected with E end is corresponding, the output L3 of described driving drive circuit U23 holds, for connecting and driving external light-emitting diode.
As shown in Figure 3, be the circuit theory diagrams of the U22 of status determination circuit described in Fig. 2, described status determination circuit judges the operating state of charger according to the charging current of the voltage of power input VCHG, the voltage of charging end VBAT and sampled signal end Isen.Described status determination circuit comprises:
(1) first condition adjudgement unit, comprise voltage comparator Comp1, current comparator Comp2 voltage comparator and with door AND1, the positive-negative input end of Comp1 connects charging end VBAT and reference voltage end VR1 (i.e. the first reference voltage end) respectively, compare and export comparative result, when charging end VBAT voltage is higher than reference voltage end VR1 voltage (voltage of such as reference voltage end VR1 is 4.1V), described voltage comparator Comp1 exports as high level.The positive-negative input end of current comparator Comp2 connects reference current end IR1 and sampled signal end Isen respectively, when the electric current of charging current and sampled signal end Isen is less than the electric current of reference current end IR1, it is also high level that described current comparator Comp2 exports, the output of described voltage comparator Comp1 and current comparator Comp2 is connected respectively with two inputs of door AND1, when the output of described voltage comparator Comp1 and current comparator Comp2 all exports high level, describedly (i.e. the output of the first condition adjudgement unit) is held to be high level with door AND1 output and state end A, represent battery full state.
(2) second condition adjudgement unit, the positive-negative input end of voltage comparator Comp3 connects reference voltage end VR2 and charging end VBAT respectively, when the voltage of charging end VBAT is lower than voltage (i.e. second reference voltage end of reference voltage end VR2, the voltage of such as reference voltage end VR2 is 2V) time, described voltage comparator Comp3 output is state end B and holds (i.e. the output of the second condition adjudgement unit), and be high level, represent short-circuit condition.
(3) third state judging unit, two inputs of NOR gate NOR1 connect described state end side a and b respectively, state end A hold for low level and state end B hold as low level time, the output of described NOR gate NOR1 and state end C hold (i.e. the output of third state judging unit) to export as high level, represent and are in normal charging condition.
(4) the 4th condition adjudgement unit, the positive-negative input end of voltage comparator Comp4 connects power input VCHG and reference voltage end VE respectively, when voltage (voltage of such as reference voltage end VE is 3.5V) lower than reference voltage end VE of the voltage of power input VCHG, the output of described comparator Comp4 is low level, when the voltage of power input VCHG is greater than the voltage of reference voltage end VE, the clock end EN of the output connection timer TIM of described voltage comparator Comp4 holds, when the output end signal of described voltage comparator Comp4 is high level, timer TIM starts timing, if it is front that Preset Time does not count full (such as presetting timing time is 10 hours), the reset terminal RST of described timer TIM holds, namely the signal that state end A holds becomes high level, then timer TIM output, namely state end D holds (i.e. the output of the 4th condition adjudgement unit) to be reset to low level, if timer reset end RST holds as low level, when not namely being reset, the Preset Time meter of described timer TIM is full, and output and state end D end become high level, and represent that battery is bad battery, time-out also cannot be full of.
(5) the 5th condition adjudgement unit; the input of inverter INV1 connects the output of described comparator Comp4; the output of inverter INV1 is state end E and holds (i.e. the output of the 5th condition adjudgement unit); the output of low level after inverter INV1 that described comparator Comp4 exports is high level; namely, when E end is for high level, represent that charger input voltage is abnormal or do not insert charger.
According to foregoing description, described status determination circuit U22 can judge five kinds of operating states according to the signal of power input VCHG, charging end VBAT and sampled signal end Isen, be respectively: when being in the first state, state end A holds as high level, and all the other state ends B, C, D, E end is low level; When being in the second state, state end B holds as high level, and all the other state ends A, C, D, E end is low level; When being in the third state, state end C holds as high level, and all the other state ends A, B, D, E end is low level; When being in the 4th state, state end D holds as high level, and all the other state ends A, B, C, E end is low level; When being in the 5th state, state end E holds as high level, and all the other state ends A, B, C, D end is low level.
As shown in Figure 4, be the circuit theory diagrams of drive circuit U24 in Fig. 2, described drive circuit comprises diverter switch unit and a driving switch, and described diverter switch unit as shown in this embodiment, can adopt five independently diverter switch S1, S2, S3, S4, S5, also can adopt other switching devices with same or similar function, and described driving switch, for driving external indicating device, adopts nmos switch MN2 to realize, described state end A, B, C, D, E end connects respectively and controls diverter switch S1, S2, S3, S4, the switching controls end of S5, described diverter switch S1, S2, S3, S4, the output of S5 is all connected to the grid (i.e. the operating side of driving switch) of nmos switch MN2, described diverter switch S1, S2, S3, the input of S4 connects power input VCHG respectively, ground end, the CLK1 end of oscillator OSC, the CLK2 end of oscillator OSC, the Ramp end of described oscillator OSC is connected to the input of described diverter switch S5, i.e. described diverter switch S1 through an amplifier OP1, S2, S3, S4, the input of S5 obtains five kinds of different state representation signals.The drain electrode (i.e. the drive end of driving switch) of described nmos switch MN2 is for connecting and driving external indicating device (such as light-emitting diode etc.), and be L3 end, source electrode is through resistance R4 ground connection.
Described diverter switch S1, S2, S3, S4, S5 are according to the status signal received from described status determination circuit, the i.e. status signal of state end A, B, C, D, E end, five of correspondence kinds of state representation signals are switched to the output of diverter switch S1, S2, S3, S4, S5, and then make the drain electrode of described nmos switch MN2 export corresponding drive singal.When state end A holds as high level, state end B ~ E end is all low level, now diverter switch S1 conducting, the grid of nmos switch MN2 to switch on power input VCHG through described diverter switch S1, be equivalent to access high level signal, nmos switch MN2 is in complete conducting state, the electric current that its L3 holds roughly is determined by (UCHG-Uth)/r2, wherein UCHG is the voltage of power input VCHG, be equivalent to high level signal, Uth is the threshold voltage of nmos switch MN2, r2 is the resistance value of resistance R2, now hold the LED 3 be connected to be normal bright state with L3.When state end B holds as high level, when other state ends are all low level, the grid of described nmos switch MN2 is grounded through described diverter switch S2, be equivalent to access low level signal, described nmos switch MN2 is in off state, L3 end does not have electric current process, now holds the LED 3 be connected to be in state of often going out with L3.When state end C holds as high level and all the other state ends are all low level, the grid of described nmos switch MN2 connects the CLK1 end signal of oscillator OSC through described diverter switch S3, CLK1 end exports the square-wave signal for slower frequency (such as frequency range is 0.1 hertz ~ 1 hertz), now holds the LED 3 be connected to be in slower frequency scintillation state with L3.When state end D is high level and other signal ends are low level, the grid of described nmos switch MN2 connects the CLK2 end signal of oscillator OSC through described diverter switch S4, CLK2 end exports the square-wave signal for very fast frequency (such as frequency range is 1 hertz ~ 50 hertz), now holds the LED 3 be connected to be in very fast frequency scintillation state with L3.When state end E is high level, and all the other state ends are when being all low level, the grid of described nmos switch MN2 is connected to the output of operational amplifier OP1 through described diverter switch S5, an output Ramp end of described oscillator is connected to the input in the same way of described operational amplifier OP1, the reverse input end of described operational amplifier OP1 is connected between the source electrode of described nmos switch and described feedback resistance R4, the triangular signal that the Ramp end that voltage on described operational amplifier OP1 controlling resistance R4 equals described oscillator OSC exports, electric current due to L3 end equals the electric current of resistance R4, equal URamp/r4, wherein URamp is the magnitude of voltage that Ramp end exports, r4 is the resistance value of resistance R4.When Ramp signal is triangular wave, URamp gradually changes, be in the alternately change procedure becoming gradually greatly and diminish gradually, that now hold the electric current of the LED 3 be connected also to be in become gradually greatly with L3 and diminish gradually replaces change procedure, makes LED3 brightness present gradual process gradually.
Fig. 5 is the circuit theory diagrams of the charger with charge management circuit in Fig. 2, charge management circuit U2 is charged to battery BAT by VBAT end, connect by L3 end and drive LED 3, realize the display to current charged state, described LED 3 is also connected with a pull-up resistor R3.In addition, the drive current of described LED3 also can be set by the resistance R4 of charge management circuit inside and be regulated, and therefore, described resistance R3 can omit, and contributes to the cost and the reduction circuit board space that reduce charger further.In addition, described LED 3 also can adopt other indicating devices to replace, and is convenient to divide into choice criteria with the eyesight of people and hearing.
According to foregoing description, described charge management circuit U2 of the present invention only has a port L3 end to drive LED 3, and indicating status comprises: (1) L3 end is in off state, and LED 3 is in OFF state.(2) L3 end is in a certain slower frequency switching frequency (such as frequency range: 0.1 hertz ~ 1 hertz) constantly on off state, and LED 3 is in corresponding with slower frequency scintillation state.(3) L3 end is in a certain very fast switching frequency (such as frequency range: 1 hertz ~ 50 hertz) constantly on off state, and LED 3 is in corresponding with very fast frequency scintillation state.(4) L3 end is in normal ground state, and LED 3 is in normal bright state.(5) L3 end exports triangular signal, LED 3 be in slowly by secretly brightening, then by bright dimmed alternately gradual change state.
According to above preferred embodiment, in the middle of practical application, the display effect under different charged state can be defined arbitrarily, namely state end A, B, C, D, E of the output of status determination circuit end can be held with state end A, B, C, D, E that described drive circuit inputs and mate arbitrarily as required, the state end A of the output of such as status determination circuit holds the state end C connecting the input of described drive circuit to hold, that is, when battery full state, LED 3 represents with slower frequency scintillation.
As the simplification of above-described embodiment, in above preferred embodiment, five condition adjudgement unit in described status determination circuit, three wherein or four can be selected according to actual needs, corresponding, the diverter switch of respective numbers also chosen by described drive circuit, and the state representation signal be connected with described diverter switch input.
Such as, only select connection diverter switch S1 that first, second, third condition adjudgement unit is corresponding, S2, S3, now, there are three kinds of following state representation.
(1) when state end A holds as high level, when other state ends are low level, the grid of nmos switch MN2 is high level, and nmos switch MN2 is in complete conducting state, and L3 end is in normal ground state, and LED3 shows as Chang Liang.(2) when state end B holds as high level, when other state ends are all low level, the grid of described nmos switch MN2 is ground connection, be equivalent to access low level signal, described nmos switch MN2 is in off state, L3 end does not have electric current process, and L3 end is in off state, and LED 3 is in OFF state.(3) when state end C holds as high level and all the other state ends are all low level, the square-wave signal of the gate turn-on oscillator OSC output of described nmos switch MN2, L3 end is in a certain frequency (such as frequency range: 0.1 hertz ~ 50 hertz) constantly on off state, and LED3 shows as blink states.
Other execution mode can the rest may be inferred.Certainly, if the status determination circuit of design has the state end of six or more, namely can judge the state of six or more, also can increase the number of described diverter switch accordingly, and the state representation signal kinds be connected with described diverter switch input.Such as, the charging current that existing charging control circuit produces, comprises precharge, constant current charge, constant voltage charge Three models, also can distinguish and represent precharge, constant current charge, constant voltage charge three kinds of charged states.
Above a kind of charge management circuit provided by the present invention and charger are described in detail, apply specific case herein to set forth principle of the present invention and execution mode, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (10)
1. a charge management circuit, comprise connect successively produce the charging control circuit of charging current and the status determination circuit for judging present charge state for controlling, it is characterized in that: also comprise the drive circuit for driving external indicating device, described drive circuit comprises diverter switch unit and a driving switch, the switching controls end of described diverter switch unit is connected with described status determination circuit, the input of described diverter switch unit is for accessing at least three kinds of different state representation signals, the output of described diverter switch unit is connected to the operating side of described driving switch, the drive end of described driving switch connects described external indicating device, described diverter switch unit is according to the status signal received from described status determination circuit, the state representation signal of correspondence is switched to the output of described diverter switch unit, and then make the drive end of described driving switch export corresponding drive singal.
2. charge management circuit according to claim 1, it is characterized in that: described diverter switch unit comprises the diverter switch corresponding to described input quantity, described status determination circuit has the state end corresponding to described switch unit input quantity, the input of described diverter switch unit is as the input of each diverter switch, correspondingly with each state end of described status determination circuit respectively to connect, described each diverter switch is according to the status signal received from described status determination circuit, corresponding one of them diverter switch of connection, the state representation signal of correspondence is switched to the output of described diverter switch unit.
3. charge management circuit according to claim 1 and 2, is characterized in that: the charging end of described charging control circuit is connected with sampled signal end with the charging end of described status determination circuit respectively with sampled signal end;
Described status determination circuit comprises the first condition adjudgement unit, second condition adjudgement unit and third state judging unit, described first condition adjudgement unit comprises the first voltage comparator, current comparator and with door, the positive-negative input end of described voltage comparator connect respectively charging end and with the first reference voltage end, the positive-negative input end of described current comparator connects reference current end and described sampled signal end respectively, described first voltage comparator is connected with two inputs of door with described respectively with the output of current comparator, described is the output of the first condition adjudgement unit with the output of door, described second condition adjudgement unit comprises the second voltage comparator, the positive-negative input end of described second voltage comparator connects the second reference voltage end and described charging end respectively, and the output of described second voltage comparator is the output of described second condition adjudgement unit, described third state judging unit comprises a NOR gate, two inputs of described NOR gate connect the output of described first condition adjudgement unit and the second condition adjudgement unit respectively, and the output of described NOR gate is the output of described third state judging unit.
4. charge management circuit according to claim 3, it is characterized in that: described condition adjudgement unit comprises the 4th condition adjudgement unit, described 4th condition adjudgement unit comprises tertiary voltage comparator and a timer, the positive-negative input end of described tertiary voltage comparator connects power input and the 3rd reference voltage end respectively, output connects the clock end of described timer, the output of described first condition adjudgement unit connects the reset terminal of described timer, and the output of described timer is the output of described 4th condition adjudgement unit.
5. charge management circuit according to claim 3, it is characterized in that: described condition adjudgement unit comprises the 5th condition adjudgement unit, comprise tertiary voltage comparator and an inverter, the positive-negative input end of described tertiary voltage comparator connects power input and the 3rd reference voltage end respectively, output connect described inverter input, the output of described inverter is the output of the 5th condition adjudgement unit.
6. charge management circuit according to claim 1, is characterized in that: described state representation signal is at least three kinds in the triangular signal of high level signal, low level signal, the square-wave signal of one or more frequencies, one or more frequencies.
7. charge management circuit according to claim 6, it is characterized in that: also comprise one in described drive circuit for exporting the oscillator of described state representation signal, described oscillator exports the square-wave signal comprising one or more frequencies, or/and the triangular signal of one or more frequencies.
8. charge management circuit according to claim 6, is characterized in that:
At the described low level signal as state representation signal, when described diverter switch unit is connected to the operating side of driving switch, described driving switch cut-off;
At the described high level signal as state representation signal, when described diverter switch unit is connected to the operating side of driving switch, described driving switch conducting;
At the described square-wave signal as state representation signal, when described diverter switch unit is connected to the operating side of driving switch, described driving switch switches between conducting and cut-off with corresponding frequency;
At the described triangular signal as state representation signal, when described diverter switch unit is connected to the operating side of driving switch, described driving switch provides the alternately variable-current becoming gradually greatly and diminish gradually with corresponding frequency.
9. charge management circuit according to claim 1, it is characterized in that: the driving switch in described drive circuit is nmos switch, the grid of described nmos switch is as the operating side of described driving switch, the drain electrode of described nmos switch is as the drive end of described driving switch, the source electrode of described nmos switch is through a feedback resistance ground connection, one of them output of described oscillator is connected to an input of an operational amplifier, another input of described operational amplifier is connected between the source electrode of described nmos switch and described feedback resistance, the output of described operational amplifier is connected with the input of described diverter switch unit.
10. have a charger for charge management circuit according to any one of the claims 1-9, it is characterized in that: comprise a light-emitting diode, the drive end of described driving switch connects and drives described light-emitting diode.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07282858A (en) * | 1994-04-12 | 1995-10-27 | Canon Inc | Charging method, charging display method, and battery charger for secondary battery |
| CN101931249A (en) * | 2009-06-25 | 2010-12-29 | 鸿富锦精密工业（深圳）有限公司 | Electronic device capable of indicating battery charged state |
| CN102856940A (en) * | 2011-06-30 | 2013-01-02 | 鸿富锦精密工业（深圳）有限公司 | Electronic device and charger capable of indicating battery charging state |
| CN102905443A (en) * | 2012-10-31 | 2013-01-30 | 上海小糸车灯有限公司 | Linear constant-current and current-sharing LED drive circuit and circuit board structure thereof |
| CN204167970U (en) * | 2014-11-14 | 2015-02-18 | 无锡中星微电子有限公司 | Charge management circuit and charger |
-
2014
- 2014-11-14 CN CN201410649154.3A patent/CN104333086B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07282858A (en) * | 1994-04-12 | 1995-10-27 | Canon Inc | Charging method, charging display method, and battery charger for secondary battery |
| CN101931249A (en) * | 2009-06-25 | 2010-12-29 | 鸿富锦精密工业（深圳）有限公司 | Electronic device capable of indicating battery charged state |
| CN102856940A (en) * | 2011-06-30 | 2013-01-02 | 鸿富锦精密工业（深圳）有限公司 | Electronic device and charger capable of indicating battery charging state |
| CN102905443A (en) * | 2012-10-31 | 2013-01-30 | 上海小糸车灯有限公司 | Linear constant-current and current-sharing LED drive circuit and circuit board structure thereof |
| CN204167970U (en) * | 2014-11-14 | 2015-02-18 | 无锡中星微电子有限公司 | Charge management circuit and charger |
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| Publication number | Publication date |
|---|---|
| CN104333086B (en) | 2017-09-26 |
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