CN101001020A - Lithium battery charge control loop - Google Patents
Lithium battery charge control loop Download PDFInfo
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- CN101001020A CN101001020A CN 200610064700 CN200610064700A CN101001020A CN 101001020 A CN101001020 A CN 101001020A CN 200610064700 CN200610064700 CN 200610064700 CN 200610064700 A CN200610064700 A CN 200610064700A CN 101001020 A CN101001020 A CN 101001020A
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Abstract
The invention discloses a controlling loop of charging for a lithium-ion battery, which includes a current and voltage controlling-coupling circuit(31), a charging LDO (32), a voltage feedback operational amplifier (ampB), a current feedback operational amplifier (ampA). The described ampB, the current and voltage controlling-coupling circuit, and the charging LDO form a current negative feedback loop. The described voltage feedback operational amplifier (ampB), the current and voltage controlling-coupling circuit, and the charging LDO(32) form a voltage negative feedback loop.
Description
[technical field]
The present invention relates to lithium battery charge control loop, relate in particular to a kind of lithium cell charging constant current constant voltage control loop of the CMOS of employing technology.
[background technology]
Lithium ion battery normal voltage 3.7V (3.6V), charging cut-ff voltage 4.2V; Lithium battery is compared major advantage with other battery and is:
1. specific energy height: compare " NI-G, ni-mh " or " plumbic acid " and wait other battery, the battery capacity of lithium battery Unit Weight is big, and same capability battery volume is little;
2. operating voltage height: the voltage of monomer lithium ion battery is 3.7V, for 3 times of NI-G, Ni-MH battery, can directly be the power logic circuitry of 3V;
3. often chargeable, memoryless performance: by contrast, the nickel-cadmium cell Memorability is strong.
Because above advantage, batteries such as the polysubstituted ni-mh of lithium battery become the power supply of portable appliance such as mobile, hand-held.
Though lithium battery possesses various advantages, serondary lithium battery is " fragile " very, in use can not overcharge, cross and to put (can damage battery or make it to scrap).Therefore, on battery, there are protection components and parts or protective circuit to damage to prevent battery.Lithium ion cell charging requirement simultaneously is very high, guarantee that the final voltage precision is within 1%; The charging standard adopts the IC of the lithium ion cell charging of crossing current, constant voltage charge, to guarantee safety, reliable, quick charge.
National standard lithium cell charging standard GBT-18287-2000 is divided into the lithium cell charging process: precharge, constant current charge, constant voltage charge.
Precharge: when being recharged cell voltage and being lower than 3V, adopt very little continuous current that it is charged, greater than 3V, this function is the battery recovery at the battery of deep discharge with little electric current up to cell voltage.
Constant current charge: when cell voltage during, adopt constant current charge, reach the charging deboost 4.2V of lithium battery up to cell voltage greater than 3V.
Constant voltage charge: when cell voltage reaches the charging deboost, adopt constant voltage charge; Consider internal resistance of cell R, the big I*R of the pressure drop when large current charge in the internal resistance; The effective voltage that actual battery charges into is 4.2-I*R; If cut off charging current this moment, then the voltage that presents of battery is 4.2-I*R＜4.2V at once; Like this, in order to be full of battery to greatest extent, charging current will reduce gradually, slowly reduces internal resistance pressure drop I*R.
At present, the various lithium cell charging IC that exist on the market adopt BiCMOS (bipolar complementary metal oxide semiconductor type) technology more, utilize triode and corresponding feedback control loop to realize constant-current constant-voltage charging control, as shown in Figure 1.
Among Fig. 1, circuit 10 mainly comprises constant current charge feedback control loop, constant voltage charge feedback control loop.
Described constant voltage charge feedback control loop comprises: constant voltage feedback amplifier triode ampB, output PMOS power tube M1 and battery.Constant voltage control voltage V
Reg=4.2v is by the end of oppisite phase input of constant voltage feedback amplifier triode ampB, the voltage of constant voltage feedback amplifier triode ampB output, feed back to the in-phase input end of constant voltage feedback amplifier triode ampB through the common-source amplifier of forming by output PMOS power tube M1 and battery, form negative feedback, accurately controlling charging voltage is V
Reg=4.2v.
Described constant current charge feedback control loop comprises: constant current feedback amplifier triode ampA, constant voltage feedback amplifier triode ampB, PMOS pipe M2 and current setting resistance Rset.Constant current control voltage is V
Prech=0.25v or V
Set=2.5v, described crossing current control voltage is by the in-phase end input of constant current feedback amplifier triode ampA, the electric current of constant current feedback amplifier triode ampA output is through constant voltage feedback amplifier triode ampB, and the inverting input that feeds back to ampA by the common-source amplifier that output pmos M2 and current setting resistance Rset form, form negative feedback, accurately the voltage of Control Node n4 is V
PrechOr V
SetTherefore, flowing through current constant is:
Perhaps
The precharge Control current and the constant current charge Control current of lithium cell charging are provided respectively, and electric current can freely dispose by resistance R set.Because source, the grid of PMOS pipe M1, PMOS pipe M2 are tied together mutually, so flow through the electric current of PMOS pipe M2, are mirrored onto on the PMOS pipe M1, realize constant current output.
But, use above-mentioned control mode to realize the compensation of loop, making loop (that is: the Rset mobility scale also is the limit scope that n4 forms) in bigger output area can steady operation be the comparison difficulty.The constant voltage charge feedback control loop is simple relatively, adopts simple Muller compensation can realize stablizing.When constant current charge, its loop comprises the common source that constant current feedback amplifier triode ampA, constant voltage feedback amplifier triode ampB and PMOS pipe M2 and current setting resistance Rset form, there are a plurality of limits like this in the loop, and because the Muller compensation of constant voltage loop, the limit of ampB can be relatively low, and the limit of n4 can be with the bigger scope of current setting resistor Rset change.As making loop stability, to make node n5 possess bigger multiplication factor generally speaking, and adopt bigger electric capacity that constant current feedback amplifier triode ampA is compensated to n4.Like this, the limit of constant voltage being fed back amplifier triode ampB and n4 raises, and establishes a big electric capacity between n4 and n2.
This compensation scheme makes the circuit structure complexity, adopts bigger electric capacity, influences the integrated of circuit; Simultaneously, for the optimal compensating scheme, the amplifier in the circuit adopts dipolar configuration, increases cost.
[summary of the invention]
Technical problem to be solved by this invention is: a kind of lithium battery constant-current and constant-voltage control circuit is provided, uses the standard CMOS manufacturing process, obtain accurate charging current and charging voltage, and level and smooth conversion between constant current charge and the constant voltage charge.
For solving the problems of the technologies described above, the invention provides a kind of lithium battery charge control loop, described control loop comprises current/voltage control coupling circuit (31), charging LDO (low pressure difference linear voltage regulator) (32), Voltage Feedback amplifier (ampB), current feedback amplifier (ampA), described current feedback amplifier (ampB), current/voltage control coupling circuit (31) and charging LDO (32) form the Current Negative Three-Point Capacitance loop, current controling signal is through current feedback amplifier (ampB), current/voltage control coupling circuit (31), charging LDO (32) feeds back to current feedback amplifier (ampB), control charging LDO output constant current carries out constant current charge to battery; Described Voltage Feedback amplifier (ampA), current/voltage control coupling circuit (31), charging LDO (32) form the voltage negative feedback control loop, voltage control signal feeds back to Voltage Feedback amplifier (ampA) through Voltage Feedback amplifier (ampA), current/voltage control coupling circuit (31), charging LDO (32), control charging LDO output constant current carries out constant voltage charge to battery.
More specifically, described control loop also comprises preliminary filling constant current commutation circuit, and described preliminary filling constant current commutation circuit is judged precharge and constant current charge state when charging, carry out precharge when charging voltage is lower than designated value; When being higher than this designated value, charging voltage carries out constant current charge.
More specifically, described current/voltage control coupling circuit (31) is selected corresponding feedback control loop according to the cell voltage that detects, and when cell voltage is lower than constant voltage charge voltage, selects current feedback loop (ampB), carries out constant current charge; When cell voltage is close to or higher than constant voltage charge voltage, select voltage feedback loop (ampA), carry out constant voltage charge.
Be converted to simulation process between the selection of more specifically, described constant current, constant voltage charge process and constant current, the constant voltage charge.
More specifically, described current/voltage control coupling circuit (31) comprise the input of one-level difference penetrate with, single-endedly penetrate amiable one-level common-source stage output.
More specifically, described difference input is penetrated with comprising PMOS pipe, the 2nd PMOS pipe and tail current source, and two source electrodes of described PMOS pipe and the 2nd PMOS pipe are connected to form node (n1); One termination power of tail current source, a terminated nodes (n1) is output with the node, form the difference input penetrate with.
More specifically, described charging LDO comprises PMOS power tube and resistance, the drain electrode of described PMOS pipe connects battery, source electrode is connected with battery with substrate, and an other termination power of resistance, described PMOS power tube bears by the extra voltage of supply voltage to the resistance drop of cell load, the electric current among the described resistance detection charging LDO (32), described resistance and PMOS power tube formed penetrate with, and with the output of resistance and PMOS power tube tie point.
More specifically, described current controling signal connects the inverting input of current feedback amplifier (ampB), the output signal of amplifier is penetrated with, one-level common source through the two-stage in the current/voltage control coupling circuit (31), and in charging LDO (32) by penetrating of forming of PMOS power tube and resistance with, again feed back to the in-phase end of current feedback amplifier (ampB), form negative feedback.
More specifically, described voltage control signal connects the in-phase input end of Voltage Feedback amplifier (ampA), the output signal of amplifier is penetrated with reaching the one-level common source through the two-stage in the current/voltage control coupling circuit (31), and the common-source stage that forms by the PMOS power tube and the internal resistance of cell among the charging LDO (32), again feed back to the end of oppisite phase of Voltage Feedback amplifier (ampA), form negative feedback.
More specifically, described control loop is made by the standard CMOS manufacturing process.
Compared with prior art, lithium battery charge control loop of the present invention uses the standard CMOS manufacturing process, obtains accurate charging current and charging voltage, and level and smooth conversion between constant current charge and the constant voltage charge.
[description of drawings]
Fig. 1 is the lithium cell charging constant current constant voltage control loop of existing employing BiCMOS technology.
Fig. 2 is a lithium electricity charging constant current constant voltage control loop of the present invention.
Fig. 3 is precharge of the present invention, constant current charge commutation circuit.
Fig. 4 is a lithium cell charging curve of the present invention.
[embodiment]
The invention will be further described below in conjunction with accompanying drawing.
Lithium battery charge control loop of the present invention, comprise current/voltage control coupling circuit, charging LDO, Voltage Feedback amplifier, current feedback amplifier, preliminary filling constant current commutation circuit, current/voltage control coupling circuit uses standard CMOS (silicon CMOS) manufacturing process, thereby obtain accurate charging current and charging voltage, and level and smooth conversion between constant current charge and the constant voltage charge.
As shown in Figure 2, lithium battery charge control loop of the present invention comprises: current/voltage control coupling circuit 31, charging LDO32, Voltage Feedback amplifier ampB, current feedback amplifier ampA.Lithium battery charge control loop also comprises preliminary filling constant current commutation circuit as shown in Figure 3.
Wherein, current controling signal feeds back to current feedback amplifier ampA through current feedback amplifier ampA, current/voltage control coupling circuit 31, charging LDO32, forms the Current Negative Three-Point Capacitance loop, control charging LDO32 output constant current; Voltage control signal feeds back to Voltage Feedback amplifier ampB through Voltage Feedback amplifier ampB, current/voltage control coupling circuit 31, charging LDO32, forms the voltage negative feedback control loop, control charging LDO32 output constant voltage.
Current/voltage control coupling circuit 31, comprise the input of one-level difference penetrate with, single-endedly penetrate amiable one-level common-source stage output.
Described one-level difference input is penetrated with comprising PMOS pipe M4, PMOS pipe M5 and tail current source I1.The source electrode of PMOS pipe M4 and M5 is connected together, and forms node n1; The substrate of M4 and M5 and their source electrode link to each other, and reduce because the inclined to one side effect of the too high lining that brings of supply voltage; The grounded drain of PMOS pipe M4 and M5.Tail current source I1 one termination power, a terminated nodes n1; This circuit is output with node n1, form the difference input penetrate with.
The grid of PMOS pipe M4 is connected with the output of current feedback amplifier ampA, forms node n5; The grid of M5 connects the output of Voltage Feedback amplifier ampB, forms node n6; The current potential of output node n1 is followed one lower among difference input node n5, the n6, and the skew output that produces a cut-in voltage Vpth.In the constant current charge stage, node n6 is near Vcc, and PMOS pipe M5 ends, and n1 follows n5, and the current feedback path is opened like this, and voltage feedback paths ends, and realizes constant current charge; In the constant voltage charge stage, node n6 voltage is far below n5, and PMOS pipe M4 ends, and PMOS pipe M5 opens, and n1 follows n6, and voltage feedback paths is opened like this, and the current feedback path ends, and realizes constant voltage charge.
Described single-ended penetrating: NMOS pipe M3 and current source I2 with comprising.The drain electrode of NMOS pipe M3 connects power supply, and source electrode links to each other with current source I1 one end, forms output node n7.The substrate ground connection of an other end of current source and NMOS pipe M3.Described single-ended penetrating with the current potential that makes output node n7 followed node n1, and driving N metal-oxide-semiconductor M2 has effectively increased the pole location of node n7, and plays the effect of current potential translation, makes node n7 point potential energy drop to V
NthBelow, when guaranteeing little electric current, current feedback loop can the better controlled electric current.
The current potential of node n7 is: V
N7=V
N1-V
Nth=V
N5+ V
Pth-V
Nth
Since the substrate mudulation effect of NMOS pipe M3, V
Nth＞V
PthSo current feedback loop can be controlled M2 and end, the n3 point is flat for high, and whole charging LDO32 ends.
Described common-source stage output comprises: NMOS pipe M2 and resistance R 1.The source electrode of M2 and substrate ground connection, drain electrode links to each other with resistance R 1, forms output node n2, resistance R 1 an other termination power.NMOS pipe M2 and R1 form the common-source stage circuit, input order end-fire with output node n7.The value of resistance R 2 is about 1k, drives charge power pipe M1 in order to bigger driving force to be provided.
Wherein, difference is penetrated with the lower node of voltage among the voltage follow n5, the n6 that make node n1, and node n5, n6 are respectively constant current, constant voltage negative-feedback signal, can realize the level and smooth conversion of constant current and constant voltage charge like this; Single-ended penetrating with the current potential translation with node n1 makes it to be fit to the common source output stage; The common source output stage is used for driving power pipe M1, and guarantees that the constant pressure and flow loop is in negative feedback, makes system's energy operate as normal.
Charging LDO32 comprises PMOS power tube M1, resistance R sns, and cell load.The grid n2 of PMOS power tube M1 receives the control voltage of voltage control coupling circuit 31 outputs, and drain electrode connects cell load, forms node n4, and this node is cell voltage, is used for Voltage Feedback.PMOS power tube M1 is used for bearing by Vcc and goes out the extra voltage of resistance R sns pressure drop to cell load, that is:
Vcc＝Vbat+Vsd+Vrsns。
I-V characteristic according to the PMOS pipe: I
DS=K
β* (V
SG-V
TH)
2(1+ λ Vsd), like this, under particular current, can be by regulating the V of M1
GS, make Vsd reach requirement, control Vbat=4.2v.
Be connected with the substrate end of resistance R sns of the source electrode of PMOS power tube M1 forms node n3, the other termination power of resistance R sns.Resistance R sns is used for detecting the electric current of charging LDO, is used for current feedback loop.The voltage of node n3 is: V
N3=Vcc-R
Sns* I
DS, like this, pass through V
N3Can learn the size of charging current.The Current Negative Three-Point Capacitance loop is by regulating the V of PMOS power tube M1
GS, with V
N3Be set in particular value, reach the purpose of control constant current.
Among Fig. 2, the output Vsns of the homophase terminated nodes n3 of current feedback amplifier ampA; Anti-phase termination V
Icon, V
IconProvide by circuit shown in Figure 3; The output of current feedback amplifier ampA links to each other with PMOS pipe M4; The homophase termination constant voltage control reference level V of Voltage Feedback amplifier ampB
RegAnti-phase terminated nodes n4, i.e. cell voltage; The output of Voltage Feedback amplifier ampB links to each other with PMOS pipe M5.
As shown in Figure 3, precharge, constant current charge commutation circuit circuit 40 comprise gating switch and comparator ampC.Two inputs of gating switch meet level: V respectively
Prech: Vcc-20mv and V
Set: Vcc-20mv.The in-phase end of comparator ampC is connected with node n4 among Fig. 2, promptly is connected with cell voltage; In-phase end joint 3v reference level; The output node n1 control gating switch of amplifier makes at high level: V
Icon=Vprech makes during low level: V
Icon=Vset.Also promptly: when cell voltage during less than 3v, comparator ampC is output as height, V
Icon=Vcc-20mv, Control current is carried out precharge; When cell voltage during greater than 3v, comparator ampC is output as low, V
Icon=Vcc-120mv, Control current is carried out Constant Electric Current.
As shown in Figure 4, the whole charging process of circuit is as follows:
When the battery starting voltage is lower than 3v: circuit 40 control V
Icon=Vcc-20mv; Voltage Feedback amplifier ampB is output as Vcc, and PMOS pipe M5 ends; Battery enters pre-charging stage.If, this moment charging current
Be V
Sns＞＞Vcc-20mv, then current feedback amplifier ampA output is near Vcc, and M4 ends; The current potential of node n1 is near Vcc like this, and the current potential of economize on electricity n7 is about V
N7=Vcc-Vnth, and lower current potential of Control Node n2 generation are with the current potential V of node n3
SnsDrag down, increase output current I
SDml
I
SDmlBe under other situations, current feedback amplifier ampA output makes the M4 conducting; Like this output signal of current feedback amplifier ampA through the difference in the current/voltage control coupling circuit input penetrate with, single-ended penetrate with among, common-source stage and the charging LDO by penetrating of forming of PMOS power tube and resistance with, again feed back to the in-phase end of amplifier, form negative feedback.The voltage V of Control Node n3
SnsEquate that with constant current control signal Vcc-20mv current constant is a pre-charge current like this:
Battery is with the pre-charge current constant current charge.
Battery is charged to 3v under the effect of pre-charge current, circuit 40 control V
Icon=Vcc-120mv, Voltage Feedback amplifier ampB is output as Vcc, and PMOS pipe M5 ends; Battery enters the constant current charge stage.Identical with pre-charging stage, by current feedback loop, the current potential V of economize on electricity n3
SnsBe set in Vcc-120mv, charging current is constant like this is:
Battery is with the quick charge of constant current charge electric current.
Charging is near 4.2v or a little higher than 4.2v under the effect of constant current charge electricity electric current for battery, and the output of Voltage Feedback amplifier ampB is less than the output of current feedback amplifier ampA; PMOS pipe M4 ends, and M5 opens.Like this output signal of amplifier ampB through the difference in the current/voltage control coupling circuit input penetrate with, the single-ended common source that forms by PMOS power tube and cell load with among, common-source stage and the charging LDO of penetrating, again feed back to the end of oppisite phase of amplifier, form negative feedback.The voltage V of Control Node n4
BatWith constant voltage control reference level V
Reg=4.2v equates.
Battery constantly is recharged, and the voltage of battery is limited at V
Reg=4.2v, charging current constantly reduces like this,
That is: V
Reg=V
o+ I
DSml* R
s=4.2v
V
oBe inside battery voltage, the Rs internal resistance of cell.
Along with V
oConstantly increase, certainly will reduce charging current I
DSmlTo keep outside batteries voltage V
Reg=4.2v.
When charging current is reduced to a certain degree, the pressure drop on the internal resistance of cell Rs influences when little battery electric quantity, can stop charging.
Greater than 3v, can directly enter constant current charge as the battery charge starting voltage.
Different with Fig. 1, voltage feedback loop of the present invention and current feedback loop are separate, and circuit structure is simple, the as easy as rolling off a log processing of circuit.Single loop comprises the dominant pole that feeds back amplifier and the limit of node n2, and other limits can be ignored (as: because the internal resistance of cell is very little, the limit of node n4 is very high) all far above them, adopts simple Muller compensation can realize loop stability.As shown in Figure 2, output node n5, the n6 of economize on electricity n2 and amplifier ampA, ampB adopt capacitor C i, Cv to carry out the Muller compensation respectively.
Claims (10)
1, a kind of lithium battery charge control loop, it is characterized in that, described control loop comprises current/voltage control coupling circuit (31), charging LDO (32), Voltage Feedback amplifier (ampB), current feedback amplifier (ampA), described current feedback amplifier (ampB), current/voltage control coupling circuit (31) and charging LDO (32) form the Current Negative Three-Point Capacitance loop, current controling signal is through current feedback amplifier (ampB), current/voltage control coupling circuit (31), charging LDO (32) feeds back to current feedback amplifier (ampB), control charging LDO output constant current carries out constant current charge to battery; Described Voltage Feedback amplifier (ampA), current/voltage control coupling circuit (31), charging LDO (32) form the voltage negative feedback control loop, voltage control signal feeds back to Voltage Feedback amplifier (ampA) through Voltage Feedback amplifier (ampA), current/voltage control coupling circuit (31), charging LDO (32), control charging LDO output constant current carries out constant voltage charge to battery.
2, lithium battery charge control loop as claimed in claim 1, it is characterized in that: described control loop also comprises preliminary filling constant current commutation circuit, described preliminary filling constant current commutation circuit is judged precharge and constant current charge state when charging, carry out precharge when charging voltage is lower than designated value; When being higher than this designated value, charging voltage carries out constant current charge.
3, lithium battery charge control loop as claimed in claim 1, it is characterized in that: described current/voltage control coupling circuit (31) is according to the cell voltage that detects, select corresponding feedback control loop, when cell voltage is lower than constant voltage charge voltage, select current feedback loop (ampB), carry out constant current charge; When cell voltage is close to or higher than constant voltage charge voltage, select voltage feedback loop (ampA), carry out constant voltage charge.
4, lithium battery charge control loop as claimed in claim 3 is characterized in that, is converted to simulation process between the selection of described constant current, constant voltage charge process and constant current, the constant voltage charge.
5, lithium battery charge control loop as claimed in claim 1 is characterized in that: described current/voltage control coupling circuit (31) comprise the input of one-level difference penetrate with, single-endedly penetrate amiable one-level common-source stage output.
6, lithium battery charge control loop as claimed in claim 5 is characterized in that, described difference input is penetrated with comprising PMOS pipe, the 2nd PMOS pipe and tail current source, and two source electrodes of described PMOS pipe and the 2nd PMOS pipe are connected to form node (n1); One termination power of tail current source, a terminated nodes (n1) is output with the node, form the difference input penetrate with.
7, lithium battery charge control loop as claimed in claim 1, it is characterized in that, described charging LDO comprises PMOS power tube and resistance, the drain electrode of described PMOS pipe connects battery, source electrode is connected with battery with substrate, an and other termination power of resistance, described PMOS power tube bears by the extra voltage of supply voltage to the resistance drop of cell load, electric current among the described resistance detection charging LDO (32), described resistance and PMOS power tube formed penetrate with, and with the output of resistance and PMOS power tube tie point.
8, lithium battery charge control loop as claimed in claim 1, it is characterized in that, described current controling signal connects the inverting input of current feedback amplifier (ampB), the output signal of amplifier is penetrated with, one-level common source through the two-stage in the current/voltage control coupling circuit (31), and in charging LDO (32) by penetrating of forming of PMOS power tube and resistance with, again feed back to the in-phase end of current feedback amplifier (ampB), form negative feedback.
9, lithium battery charge control loop as claimed in claim 1, it is characterized in that, described voltage control signal connects the in-phase input end of Voltage Feedback amplifier (ampA), the output signal of amplifier is penetrated with reaching the one-level common source through the two-stage in the current/voltage control coupling circuit (31), and the common-source stage that forms by the PMOS power tube and the internal resistance of cell among the charging LDO (32), again feed back to the end of oppisite phase of Voltage Feedback amplifier (ampA), form negative feedback.
10, lithium battery charge control loop as claimed in claim 1 is characterized in that, described control loop is made by the standard CMOS manufacturing process.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610064700 CN101001020A (en) | 2006-12-30 | 2006-12-30 | Lithium battery charge control loop |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610064700 CN101001020A (en) | 2006-12-30 | 2006-12-30 | Lithium battery charge control loop |
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| CN101001020A true CN101001020A (en) | 2007-07-18 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101931255A (en) * | 2010-09-29 | 2010-12-29 | 无锡中星微电子有限公司 | Charging management circuit |
| CN102195321A (en) * | 2011-04-08 | 2011-09-21 | 昆山盛鸿信息科技有限公司 | Intelligent load distribution circuit of lithium battery power |
| CN102738852A (en) * | 2011-03-31 | 2012-10-17 | 株式会社丰田自动织机 | Auxiliary battery charging apparatus |
| CN103176494A (en) * | 2011-12-23 | 2013-06-26 | 联芯科技有限公司 | Voltage-controlled zero compensating circuit |
| CN103427637A (en) * | 2012-05-15 | 2013-12-04 | 英飞凌科技股份有限公司 | Power converter circuit |
| CN106685015A (en) * | 2017-03-14 | 2017-05-17 | 江苏美的清洁电器股份有限公司 | Charging method, charging unit and electronic device |
| CN109061486A (en) * | 2018-06-29 | 2018-12-21 | 深圳市科列技术股份有限公司 | A kind of method and system of determining constant-current charge stop time point |
| CN109861329A (en) * | 2019-02-18 | 2019-06-07 | 上海南麟电子股份有限公司 | Linear charging systems, constant-current and constant-voltage control circuit and its voltage follow control method |
-
2006
- 2006-12-30 CN CN 200610064700 patent/CN101001020A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101931255A (en) * | 2010-09-29 | 2010-12-29 | 无锡中星微电子有限公司 | Charging management circuit |
| CN101931255B (en) * | 2010-09-29 | 2012-09-26 | 无锡中星微电子有限公司 | Charging management circuit |
| CN102738852A (en) * | 2011-03-31 | 2012-10-17 | 株式会社丰田自动织机 | Auxiliary battery charging apparatus |
| CN102195321A (en) * | 2011-04-08 | 2011-09-21 | 昆山盛鸿信息科技有限公司 | Intelligent load distribution circuit of lithium battery power |
| CN103176494A (en) * | 2011-12-23 | 2013-06-26 | 联芯科技有限公司 | Voltage-controlled zero compensating circuit |
| CN103427637A (en) * | 2012-05-15 | 2013-12-04 | 英飞凌科技股份有限公司 | Power converter circuit |
| CN103427637B (en) * | 2012-05-15 | 2016-01-20 | 英飞凌科技股份有限公司 | Circuit for power conversion |
| CN106685015A (en) * | 2017-03-14 | 2017-05-17 | 江苏美的清洁电器股份有限公司 | Charging method, charging unit and electronic device |
| CN106685015B (en) * | 2017-03-14 | 2019-04-26 | 江苏美的清洁电器股份有限公司 | Charging method, charging unit and electronic device |
| CN109061486A (en) * | 2018-06-29 | 2018-12-21 | 深圳市科列技术股份有限公司 | A kind of method and system of determining constant-current charge stop time point |
| CN109861329A (en) * | 2019-02-18 | 2019-06-07 | 上海南麟电子股份有限公司 | Linear charging systems, constant-current and constant-voltage control circuit and its voltage follow control method |
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