双电池方案 电源管理芯片(手机)
FEATURES DESCRIPTIONAPPLICATIONSPOWER FLOW DIAGRAM(1)bq24070SLUS694A–MARCH2006–REVISED MARCH2006 SINGLE-CHIP CHARGE AND SYSTEM POWER-PATH MANAGEMENT IC•Small3,5mm×4,5mm QFN Package The bq24070device is a highly integrated Li-ionlinear charger and system power-path management •Designed for Single-Cell Li-Ion-ordevice targeted at space-limited portable Li-Polymer-Based Portable Applicationsapplications.The bq24070offers DC supply(AC •Integrated Dynamic Power-Path Managementadapter)power-path management with autonomous (DPPM)Feature Allowing the AC Adapter to power-source selection,power FETs and current Simultaneously Power the System and sensors,high-accuracy current and voltage Charge the Battery regulation,charge status,and charge termination,ina single monolithic device.•Power Supplement Mode Allows Battery toSupplement the AC Input Current The bq24070powers the system while independently •Autonomous Power Source Selection(AC charging the battery.This feature reduces the charge Adapter or BAT)and discharge cycles on the battery,allows forproper charge termination and allows the system to •Supports Up to2-A Total Currentrun with an absent or defective battery pack.This •Thermal Regulation for Charge Control feature also allows for the system to instantaneously•Charge Status Outputs for LED or System turn on from an external power source in the case ofa deeply discharged battery pack.The IC design isInterface Indicates Charge and Faultfocused on supplying continuous power to the Conditionssystem when available from the AC adapter or •Reverse Current,Short-Circuit,and Thermalbattery sources.Protection•Power Good Status Outputs•Smart Phones and PDA•MP3Players•Digital Cameras and Handheld Devices•Internet Appliances(1)See Figure2and functional block diagram for more detailed feature information.(2)P-FET back gate body diodes are disconnected to prevent body diode conduction.Please be aware that an important notice concerning availability,standard warranty,and use in critical applications of TexasInstruments semiconductor products and disclaimers thereto appears at the end of this data sheet.PRODUCTION DATA information is current as of publication date.Copyright©2006,Texas Instruments Incorporated Products conform to specifications per the terms of the TexasInstruments standard warranty.Production processing does notnecessarily include testing of all parameters. bq24070SLUS694A–MARCH2006–REVISED MARCH2006These devices have limited built-in ESD protection.The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOSFET gates.The MODE pin selects the priority of the input sources.If an input source is not available,then the battery is selected as the source.With the MODE pin high,the bq24070attempts to charge from the input at the charge rate set by ISET1pin.With the MODE pin low,the bq24070defaults to USB charging at the charge rate.This feature allows the use of a single connector(mini-USB cable),where the host programs the MODE pin according to the source that is connected(AC adaptor or USB port).Table1summarizes the MODE pin function.Table1.Power Source Selection Function SummaryMODE STATE AC MAXIMUM SYSTEM USB BOOT-UPADAPTER CHARGE RATE(1)POWER FEATURESOURCE Low Present ISET2USB EnabledAbsent N/A Battery Disabled High Present ISET1AC DisabledAbsent N/A Battery Disabled (1)Battery charge rate is always set by ISET1,but may be reduced by a limited input source(ISET2USB mode)and I OUT system load.ORDERING INFORMATION(1)BATTERY PART PACKAGE T A OUT PIN STATUSVOLTAGE(V)NUMBER(2)(3)MARKING4.2Regulated to4.4V(4)bq24070RHLR Production BRQ–40°C to125°C4.2Regulated to4.4V(4)bq24070RHLT Production BRQ(1)For the most current package and ordering information,see the Package Option Addendum at the end of this document,or see the TIWeb site at .(2)The RHL package is available in the following options:R-taped and reeled in quantities of3,000devices per reel.T-taped and reeled in quantities of250devices per reel.(3)This product is RoHS compatible,including a lead concentration that does not exceed0.1%of total product weight,and is suitable foruse in specified lead-free soldering processes.In addition,this product uses package materials that do not contain halogens,including bromine(Br)or antimony(Sb)above0.1%of total product weight.(4)If AC<V O(OUT-REG),the AC is connected to the OUT pin by a P-FET,(Q1).2Submit Documentation FeedbackABSOLUTE MAXIMUM RATINGS(1)RECOMMENDED OPERATING CONDITIONS DISSIPATION RATINGSbq24070 SLUS694A–MARCH2006–REVISED MARCH2006over operating free-air temperature range(unless otherwise noted)bq24070Input voltage IN(DC voltage wrt(with respect to)VSS)–0.3V to18VBAT,CE,DPPM,PG,Mode,OUT,ISET1,ISET2,STAT1,–0.3V to7VSTAT2,TS,(all DC voltages wrt VSS)Input voltageV REF(DC voltage wrt VSS)–0.3V to V O(OUT)+0.3VTMR–0.3V to V O+0.3VInput current 3.5AOUT4AOutput currentBAT(2)–4A to3.5AOutput sink current PG,STAT1,STAT2, 1.5mAStorage temperature range,T stg–65°C to150°CJunction temperature range,T J–40°C to150°CLead temperature(soldering,10seconds)300°C(1)Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device.These are stress ratingsonly,and functional operation of the device at these or any other conditions beyond those indicated under recommended operating conditions is not implied.Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.All voltage values are with respect to the network ground terminal unless otherwise noted.(2)Negative current is defined as current flowing into the BAT pin.MIN MAX UNIT V CC Supply voltage(V IN)(1) 4.3516VI AC Input current2AT J Operating junction temperature range–40125°C (1)Verify that power dissipation and junction temperatures are within limits at maximum V CC.T A≤40°C DERATING FACTORPACKAGEθJAPOWER RATING T A>40°C20-pin RHL(1) 1.81W21mW/°C46.87°C/W(1)This data is based on using the JEDEC High-K board and the exposed die pad is connected to a Cu pad on the board.This isconnected to the ground plane by a2×3via matrix.3Submit Documentation FeedbackELECTRICAL CHARACTERISTICSbq24070SLUS694A–MARCH 2006–REVISED MARCH 2006over junction temperature range (0°C ≤T J ≤125°C)and the recommended supply voltage range (unless otherwise noted)PARAMETERTEST CONDITIONSMINTYPMAXUNITINPUT BIAS CURRENTS I CC(SPLY)Active supply current,VCC V VCC >V VCC(min)12mAV IN <V (BAT)Sleep current (current into BAT I CC(SLP)2.6V ≤V I(BAT)≤V O(BAT-REG),25pin)Excludes load on OUT pinV I(AC)≤6V,Total current into IN pin with I CC(IN-STDBY)Input standby currentchip disabled,Excludes all loads,200CE=LOW,after t (CE-HOLDOFF)delay µATotal current into BAT pin with input present and chip disabled;I CC(BAT-STDBY)BAT standby currentExcludes all loads,CE=LOW,4565after t (CE-HOLDOFF)delay,0°C ≤T J ≤85°CI IB(BAT)Charge done current,BAT Charge DONE,input supplying the load15OUT PIN-VOLTAGE REGULATION Output regulation V O(OUT-REG)V I(AC)≥4.4V+V DO4.44.5VvoltageOUT PIN –DPPM REGULATION V (DPPM-SET)DPPM set point (1)V DPPM-SET <V OUT 2.6 3.8V I (DPPM-SET)DPPM current source Input present95100105µASFDPPM scale factorV (DPPM-REG)=V (DPPM-SET)×SF1.1391.1501.162OUT PIN –FET (Q1,Q2)DROP-OUT VOLTAGE ®DS(on))V I(AC)≥V CC(min),Mode =High,V (ACDO)AC to OUT dropout voltage (2)300475I I(AC)=1A,(I O(OUT)+I O(BAT)),or no input mVBAT to OUT dropout voltage V (BATDO)V I(BAT)≥3V,I i(BAT)=1.0A,V CC <V i(BAT)40100(discharging)OUT PIN -BATTERY SUPPLEMENT MODE Enter battery supplement mode V I(OUT)V BSUP1(battery supplements OUT current V I(BAT)>2V≤V I(BAT)in the presence of input source –60mVVV I(OUT)V BSUP2Exit battery supplement modeV I(BAT)>2V≥V I(BAT)–20mVOUT PIN -SHORT CIRCUIT Current source between BAT to OUT for I OSH1BAT to OUT short-circuit recovery short-circuit recovery to 10mA V I(OUT)≤V I(BAT)–200mV R SHACAC to OUT short-circuit limit V I(OUT)≤1V500ΩBAT PIN CHARGING –PRECHARGE Precharge to fast-charge transition V (LOWV)Voltage on BAT2.933.1V thresholdDeglitch time for fast-charge to t FALL =100ns,10mV overdrive,T DGL(F)22.5msprecharge transition (3)V I(BAT)decreasing below threshold 1V <V I(BAT)<V (LOWV),t <t (PRECHG),I O(PRECHG)Precharge range 10150mA I O(PRECHG)=(K (SET)×V (PRECHG))/R SET V (PRECHG)Precharge set voltage1V <V I(BAT)<V (LOWV),t <t (PRECHG)225250275mVBAT PIN CHARGING -CURRENT REGULATION V i (BAT)>V (LOWV),Mode =High I O(BAT)Battery charge current range (4)I OUT(BAT)=(K (SET)×V (SET)/R SET ),10010001500mA V I (OUT)>V O (OUT-REG)+V (DO-MAX)R PBATBAT to OUT pullupV i(BAT)<1V1000Ω(1)V (DPPM-SET)is scaled up by the scale factor for controlling the output voltage V (DPPM-REG).(2)V DO(max),dropout voltage is a function of the FET,R DS(on),and drain current.The dropout voltage increases proportionally to the increase in current.(3)All deglitch periods are a function of the timer setting and is modified in DPPM or thermal regulation modes by the percentages that the program current is reduced.(4)When input current remains below 2A,the battery charging current may be raised until the thermal regulation limits the charge current.4Submit Documentation Feedbackbq24070 SLUS694A–MARCH2006–REVISED MARCH2006ELECTRICAL CHARACTERISTICS(continued)over junction temperature range(0°C≤T J≤125°C)and the recommended supply voltage range(unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNITVoltage on ISET1,V VCC≥4.35V,Battery charge current setV(SET)V I(OUT)-V I(BAT)>V(DO-MAX), 2.47 2.50 2.53V voltage(5)V I(BAT)>V(LOWV)100mA≤I O(BAT)≤1.5A375425450K(SET)Charge current set factor,BAT10mA≤I O(BAT)≤100mA(6)300450600USB MODE INPUT CURRENT LIMITISET2=Low8090100I(USB)USB input port current range mAISET2=High400500BAT PIN CHARGING VOLTAGE REGULATION,V O(BAT-REG)+V(DO-MAX)<V CC,I TERM<I BAT(OUT)≤1ABattery charge voltage 4.2VV O(BAT-REG)T A=25°C–0.5%0.5% Battery charge voltage regulationaccuracy–1%1%CHARGE TERMINATION DETECTIONCharge termination detection V I(BAT)>V(RCH),I(TERM)10150mA range I(TERM)=(K(SET)×V(TERM))/R SETV I(BAT)>V(RCH),Mode=High230250270 Charge termination set voltage,V(TERM)mV measured on ISET1VI(BAT)>V(RCH),Mode=Low95100130t FALL=100ns,10mV overdrive,Deglitch time for terminationT DGL(TERM)I CHG increasing above or decreasing22.5ms detectionbelow thresholdTEMPERATURE SENSE COMPARATORSV LTF High voltage threshold Temp fault at V(TS)>V LTF 2.465 2.500 2.535VV HTF Low voltage threshold Temp fault at V(TS)<V HTF0.4850.5000.515VI TS Temperature sense current source94100106µAR(TMR)=50kΩ,V I(BAT)increasing orDeglitch time for temperature faultT DGL(TF)decreasing above and below;22.5ms detection(7)100-ns fall time,10-mv overdriveBATTERY RECHARGE THRESHOLDV O(BAT-REG)V O(BAT-REG)V O(BAT-REG)V RCH Recharge threshold voltage V–0.075–0.100–0.125R(TMR)=50kΩ,V I(BAT)increasingDeglitch time for rechargeT DGL(RCH)or decreasing below threshold,22.5ms detection(7)100-ns fall time,10-mv overdriveSTAT1,STAT2,AND PG,OPEN DRAIN(OD)OUTPUTS(8)I OL=5mA,An external pullupV OL Low-level output saturation voltage0.25Vresistor≥1K required.I LKG Input leakage current15µA ISET2,CE INPUTSV IL Low-level input voltage00.4VV IH High-level input voltage 1.4I IL Low-level input current,CE–1I IH High-level input current,CE1µAI IL Low-level input current,ISET2V ISET2=0.4V–20I IH High-level input current,ISET2V ISET2=V CC40t(CE-HLDOFF)Holdoff time,CE CE going low only46ms MODE INPUTFalling Hi→Low;280K±10%appliedV IL Low-level input voltage0.9751 1.025Vwhen low.V IH High-level input voltage Input R Mode sets external hysteresis V IL+.01V IL+.024VI IL Low-level input current,Mode–1µA(5)For half-charge rate,V(SET)is1.25V±25mV.(6)Specification is for monitoring charge current via the ISET1pin during voltage regulation mode,not for a reduced fast-charge level.(7)All deglitch periods are a function of the timer setting and is modified in DPPM or thermal regulation modes by the percentages that theprogram current is reduced.(8)See Charger Sleep mode for PG(V CC=V IN)specifications.5Submit Documentation Feedbackbq24070SLUS694A–MARCH 2006–REVISED MARCH 2006ELECTRICAL CHARACTERISTICS (continued)over junction temperature range (0°C ≤T J ≤125°C)and the recommended supply voltage range (unless otherwise noted)PARAMETERTEST CONDITIONSMINTYPMAXUNITTIMERS K (TMR)Timer set factor t (CHG)=K (TMR)×R (TMR)0.3130.3600.414s/ΩR (TMR)(9)External resistor limits 30100k Ωt (PRECHG)Precharge timer0.09×t (CHG)0.10×t (CHG)0.11×t (CHG)s Timer fault recovery pullup from I (FAULT)1k ΩOUT to BATCHARGER SLEEP THRESHOLDS (PG THRESHOLDS,LOW →POWER GOOD)V VCC ≤V (UVLO)≤V I(BAT)≤V O(BAT-REG),V (SLPENT)(10)Sleep-mode entry thresholdV I(BAT)No t (BOOT-UP)delay+125mVVV VCC ≥V (UVLO)≤V I(BAT)≤V O(BAT-REG),V (SLPEXIT)(10)Sleep-mode exit thresholdV I(BAT)No t (BOOT-UP)delay+190mVR (TMR)=50k Ω,t (DEGL)Deglitch time for sleep mode (11)V (IN)decreasing below threshold,100-ns 22.5msfall time,10-mv overdriveSTART-UP CONTROL BOOT-UP On the first application of input with t (BOOT-UP)Boot-up time120150180msMode LowSWITCHING POWER SOURCE TIMING When input applied.Measure from:Switching power source from input [PG:Lo →Hi to I (IN)>5mA],t SW-BAT50µsto batteryI (OUT)=100mA,R TRM =50K THERMAL SHUTDOWN REGULATION (12)T (SHTDWN)Temperature trip T J (Q1and Q3only)155Thermal hysteresisT J (Q1and Q3only)30°CT J(REG)Temperature regulation limitT J (Q2)115135UVLO V (UVLO)Undervoltage lockout Decreasing V CC2.452.50 2.65V Hysteresis 27mV (9)To disable the safety timer and charge termination,tie TMR to the V REF pin.(10)The IC is considered in sleep mode when IN is absent (PG =OPEN DRAIN).(11)Does not declare sleep mode until after the deglitch time and implement the needed power transfer immediately according to theswitching specification.(12)Reaching thermal regulation reduces the charging current.Battery supplement current is not restricted by either thermal regulation orshutdown.Input power FETs turn off during thermal shutdown.The battery FET is only protected by a short-circuit limit which typically does not cause a thermal shutdown (input FETs turning off)by itself.6Submit Documentation FeedbackDEVICE INFORMATIONSTAT2INBA TBA T ISET2 MODECEbq24070RHLRHL P ACKAGE(T OP VIEW)PGOUTOUTOUTTMRDPPMTSNDREFVSSISETSTAT1GNDbq24070 SLUS694A–MARCH2006–REVISED MARCH2006TERMINAL FUNCTIONSTERMINALI/O DESCRIPTIONNAME NO.IN4I Charge input voltagePG18O Power-good status output(open-drain)BAT5,6I/O Battery input and output.CE9I Chip enable input(active high)DPPM13I Dynamic power-path management set point(account for scale factor)ISET110I/O Charge current set point and precharge and termination set pointCharge current set point for USB port.(High=500mA,Low=100mA)For bq24070,see half-charge ISET27Icurrent mode using ISET2.OUT15,16,17O Output terminal to the systemMODE8I Power source selection input(Low for USB mode current limit)STAT12O Charge status output1(open-drain)STAT23O Charge status output2(open-drain)TMR14I/O Timer program input programmed by resistor.Disable safety timer and termination by tying TMR to V REF. TS12I/O Temperature sense inputGND19,20I Ground inputVREF1O Internal reference signalGround input(the thermal pad on the underside of the package)There is an internal electrical connectionbetween the exposed thermal pad and VSS pin of the device.The exposed thermal pad must beVSS11–connected to the same potential as the VSS pin on the printed-circuit board.Do not use the thermal padas the primary ground input for the device.VSS pin must be connected to ground at all times.7Submit Documentation FeedbackINISET2ST A T1ST A T2VSSTSDPPMISET1BA TGNDCEPG GND −04084TMROUTV REFbq24070SLUS694A–MARCH 2006–REVISED MARCH 2006FUNCTIONAL BLOCK DIAGRAM8Submit Documentation FeedbackFUNCTIONAL DESCRIPTIONSCHARGECONTROLPre-ConditioningRegulationVoltage RegulationCurrentMinimum Charge VoltagePre−Conditioningand Term DetectUDG−04087bq24070SLUS694A–MARCH 2006–REVISED MARCH 2006The bq24070supports a precision Li-ion or Li-polymer charging system suitable for single-cell portable devices.See a typical charge profile,application circuit,and an operational flow chart in Figure 1through Figure 3,respectively.Figure 1.Charge Profile9Submit Documentation FeedbackUDG −04083Control and Status Signalsbq24070bq24070SLUS694A–MARCH 2006–REVISED MARCH 2006FUNCTIONAL DESCRIPTIONS (continued)Figure 2.Typical Application Circuit10Submit Documentation FeedbackFigure3.Charge Control Operational Flow ChartAutonomous Power Source Selection,Mode Control PinWith the MODE input low,the bq24070defaults to USB-mode charging,and the supply current is limited by the ISET2pin(100mA for ISET2=Low,500mA for ISET2=High).If an input source is not available,then the battery is selected as the source.Boot-Up SequenceIn order to facilitate the system start-up and USB enumeration,the bq24070offers a proprietary boot-up sequence.On the first application of power to the bq24070,this feature enables the100-mA USB charge rate for a period of approximately150ms,(t(BOOT-UP)),ignoring the ISET2and CE inputs setting.At the end of this period,the bq24070implements CE and ISET2inputs settings.Table1indicates when this feature is enabled. See Figure8.Power-Path ManagementThe bq24070powers the system while independently charging the battery.This features reduces the charge and discharge cycles on the battery,allows for proper charge termination,and allows the system to run with an absent or defective battery pack.This feature gives the system priority on input power,allowing the system to power up with a deeply discharged battery pack.This feature works as follows.Figure4.Power-Path ManagementCase1:AC Mode(Mode=High)System PowerIn this case,the system load is powered directly from the AC adapter through the internal transistor Q1(see Figure4).The output is regulated at4.4V.If the system load exceeds the capacity of the supply,the output down to the battery's voltage.Charge ControlWhen in AC mode the battery is charged through switch Q2based on the charge rate set on the ISET1input. Dynamic Power-Path Management(DPPM)This feature monitors the output voltage(system voltage)for input power loss due to brown outs,current limiting, or removal of the input supply.If the voltage on the OUT pin drops to a preset value,V(DPPM)×SF,due to a limited amount of input current,then the battery charging current is reduced until the output voltage stops dropping.The DPPM control tries to reach a steady-state condition where the system gets its needed current and the battery is charged with the remaining current.No active control limits the current to the system; therefore,if the system demands more current than the input can provide,the output voltage drops just below the battery voltage and Q2turns on which supplements the input current to the system.DPPM has three main advantages.V (DPPM−REG)+I (DPPM) R (DPPM) SF(1)Case 2:USB Mode (Mode =L)1.This feature allows the designer to select a lower power wall adapter,if the average system load ismoderate compared to its peak power.For example,if the peak system load is 1.75A,average system load is 0.5A and battery fast-charge current is 1.25A,the total peak demand could be 3A.With DPPM,a 2-A adaptor could be selected instead of a 3.25-A supply.During the system peak load of 1.75A and charge load of 1.25A,the smaller adaptor’s voltage drops until the output voltage reaches the DPPM regulation voltage threshold.The charge current is reduced until there is no further drop on the output voltage.The system gets its 1.75-A charge and the battery charge current is reduced from 1.25A to 0.25A.When the peak system load drops to 0.5A,the charge current returns to 1A and the output voltage returns to its normal value.ing DPPM provides a power savings compared to configurations without DPPM.Without DPPM,if thesystem current plus charge current exceed the supply’s current limit,then the output is pulled down to the battery.Linear chargers dissipate the unused power (V IN -V OUT )×I LOAD .The current remains high (at current limit)and the voltage drop is large for maximum power dissipation.With DPPM,the voltage drop is less (V IN -V (DPPM-REG))to the system which means better efficiency.The efficiency for charging the battery is the same for both cases.The advantages include less power dissipation,lower system temperature,and better overall efficiency.3.The DPPM sustains the system voltage no matter what causes it to drop,if at all possible.It does this byreducing the noncritical charging load while maintaining the maximum power output of the adaptor.Note that the DPPM voltage,V (DPPM),is programmed as follows:whereR (DPPM)is the external resistor connected between the DPPM and VSS pins.I (DPPM)is the internal current source.SF is the scale factor as specified in the specification table.The safety timer is dynamically adjusted while in DPPM mode.The voltage on the ISET1pin is directly proportional to the programmed charging current.When the programmed charging current is reduced,due to DPPM,the ISET1and TMR voltages are reduced and the timer’s clock is proportionally slowed,extending the safety time.In normal operation V(TMR)=2.5V;and,when the clock is slowed,V(TMR)is reduced.When V(TMR)=1.25V,the safety timer has a value close to 2times the normal operation timer value.See Figure 5through Figure 6.System PowerIn this case,the system load is powered from a USB port through the internal switch Q1(see Figure 4).Note that in this case,Q1regulates the total current to the 100-mA or 500-mA level,as selected on input.The output,V OUT ,is regulated to 4.4V.The system's power management is responsible for keeping its system load below the USB current level selected (if the battery is critically low or missing).Otherwise,the output drops to the battey voltage;therefore,the system should have a low-power mode for USB power application.The DPPM feature keeps the output from dropping below its programmed threshold,due to the battery charging current,by reducing the charging current.Charge ControlWhen in USB mode,Q1regulates the input current to the value selected by the ISET2pin (0.1/0.5A).The charge current to the battery is set by the ISET1resistor (typically >0.5A).Because the charge current typically is programmed for more current than the USB current limit allows,the output voltage drops to the battery voltage or DPPM voltage,whichever is higher.If the DPPM threshold is reached first,the charge current is reduced until V OUT stops dropping.If V OUT drops to the battery voltage,the battery is able to supplement the input current to the system.V (DPPM−REG)+I (DPPM) R (DPPM) SF(2)Feature PlotsT = 4.26 V , DPPM ModeReg. @ 4.4 V (bq24070)V O U TV A CI C H GI O U TO U T D P P M −O U V OUT ≈V ,OUT BAT Supplement Mode Dynamic Power-Path Management (DPPM)The theory of operation is the same as described in CASE 1,except that Q1is restricted to the USB current level selected by the ISET2pin.Note that the DPPM voltage,V (DPPM),is programmed as follows:whereR (DPPM)is the external resistor connected between the DPPM and VSS pins.I (DPPM)is the internal current source.SF is the scale factor as specified in the specification table.Figure 5illustrates DPPM and battery supplement modes as the output current (I OUT )is increased;channel 1=5.4V;channel 2(CH2)V OUT ;channel 3(CH3)I OUT =0to 2.2A to 0A;channel 4(CH4)V BAT =3.5V;I (PGM-CHG)=1A.In typical operation,bq24070(V OUT =4.4V reg ),through an AC adaptor overload condition and recovery.The AC input is set for ~5.1V (1.5A current limit),I (CHG)=1A,V (DPPM-SET)=3.7V,V (DPPM-OUT)=1.15×V (DPPM-SET)=4.26V,V BAT =3.5V,Mode =H,and USB input is not connected.The output load is increased from 0A to ~2.2A and back to 0A as shown in the bottom waveform.As the I OUT load reaches 0.5A,along with the 1-A charge current,the adaptor starts to current limit,the output voltage drops to the DPPM-OUT threshold of 4.26V.This is DPPM mode.The AC input tracks the output voltage by the dropout voltage of the AC FET.The battery charge current is then adjusted back as necessary to keep the output voltage from falling any further.Once the output load current exceeds the input current,the battery has to supplement the excess current and the output voltage falls just below the battery voltage by the dropout voltage of the battery FET.This is the battery supplement mode.When the output load current is reduced,the operation described is reversed as shown.If the DPPM-OUT voltage was set below the battery voltage,during input current limiting,the output falls directly to the battery's voltage.Under USB operation,when the loads exceeds the programmed input current thresholds a similar pattern is observed.If the output load exceeds the available USB current,the output instantly goes into the battery supplement mode.Figure 5.DPPM and Battery Supplement ModesFigure 6illustrates when Mode is toggled low for 500µs.Power transfers from AC to USB to AC;channel 1V ACV USBV OUTV BAT Break Before MakeSystem Capacitance Powering System USB is Charging System CapacitanceDPPM ModeHiLow PSEL (CH1)VAC =5.4V;channel 2(CH2)V (USB)=5V;channel 3(CH3)V OUT ;output current,I OUT =0.25A;channel 4(CH4)V BAT =3.5V;and I (PGM-CHG)=1A.When the Mode went low (1st div),the AC FET opened,and the output fell until the USB FET turned on.Turning off the active source before turning on the replacement source is referred to as break-before-make switching.The rate of discharge on the output is a function of system capacitance and load.Note the cable IR drop in the AC and USB inputs when they are under load.At the 4th division,the output has reached steady-state operation at the DPPM voltage level (charge current has been reduced due to the limited USB input current).At the 6th division,the Mode goes high and the USB FET turns off followed by the AC FET turning on.The output returns to its regulated value,and the battery returns to its programmed current level.Figure 6.Toggle Mode LowFigure 7illustrates when a battery is inserted for power up;channel 1(CH1)VAC =0V;channel 2(CH2)V USB =3(CH3)V OUT ;output current,I OUT =0.25A for V OUT >2V;channel 4(CH4)V BAT =3.5V;C (DPPM)=0pF.When there are no power sources and the battery is inserted,the output tracks the battery voltage if there is no load (<10mA of load)on the output,as shown.If a load is present that keeps the output more than 200mV below the battery,a short-circuit condition is declared.At this time,the load has to be removed to recover.A capacitor can be placed on the DPPM pin to delay implementing the short-circuit mode and get unrestricted (not limited)current.。
电源管理芯片工作原理和应用
电源管理芯片工作原理和应用本文主要是关于电源管理芯片的相关介绍，并着重对电源管理芯片进行了详尽的阐述。
电源管理芯片电源管理芯片（Power Management Integrated Circuits），是在电子设备系统中担负起对电能的变换、分配、检测及其他电能管理的职责的芯片。
主要负责识别CPU供电幅值，产生相应的短矩波，推动后级电路进行功率输出。
常用电源管理芯片有HIP6301、IS6537、RT9237、ADP3168、KA7500、TL494等。
基本类型主要电源管理芯片有的是双列直插芯片，而有的是表面贴装式封装，其中HIP630x系列芯片是比较经典的电源管理芯片，由著名芯片设计公司Intersil设计。
它支持两/三/四相供电，支持VRM9.0规范，电压输出范围是1.1V-1.85V，能为0.025V的间隔调整输出，开关频率高达80KHz，具有电源大、纹波小、内阻小等特点，能精密调整CPU供电电压。
应用范围电源管理芯片的应用范围十分广泛，发展电源管理芯片对于提高整机性能具有重要意义，对电源管理芯片的选择与系统的需求直接相关，而数字电源管理芯片的发展还需跨越成本难关。
当今世界，人们的生活已是片刻也离不开电子设备。
电源管理芯片在电子设备系统中担负起对电能的变换、分配、检测及其它电能管理的职责。
电源管理芯片对电子系统而言是不可或缺的，其性能的优劣对整机的性能有着直接的影响。
提高性能所有电子设备都有电源，但是不同的系统对电源的要求不同。
为了发挥电子系统的最佳性能，需要选择最适合的电源管理方式。
首先，电子设备的核心是半导体芯片。
而为了提高电路的密度，芯片的特征尺寸始终朝着减小的趋势发展，电场强度随距离的减小而线性增加，如果电源电压还是原来的5V，产生的电场强度足以把芯片击穿。
所以，这样，电子系统对电源电压的要求就发生了变化，。
正负电源芯片
正负电源芯片
正负电源芯片，也叫做电池管理芯片或电源管理芯片，是一种用于管理电池电力的重要集成电路。
正负电源芯片的主要作用是监控电池的状态、确保电池的安全使用、提供电力管理功能和优化电池的充放电效率。
在移动设备、电动车辆、无人机、消费电子产品等领域都有广泛的应用。
正负电源芯片的基本原理是通过内嵌的电流传感器、电压传感器、温度传感器等元器件来监测电池的状态。
它可以实时检测电池的电量、电压、温度等重要参数，并将这些信息传输给主控电路或外部设备。
这样，就可以及时了解电池的状况，避免过充、过放、过电流等问题，保护电池的安全性。
正负电源芯片不仅能监控电池的状态，还具备智能电力管理功能。
它可以根据电池的实际情况，自动调节电流、电压等参数，提供合适的电力输出。
例如，在手机充电时，正负电源芯片可以根据电池的状态，智能地控制充电速度，避免过快充电导致电池发热、安全问题。
同时，正负电源芯片还能提供快速充电、低功耗等功能，满足用户的多样化需求。
另外，正负电源芯片还能优化电池的充放电效率。
它能够提供最佳的电流、电压输出曲线，减少能量损耗，提升充电效率。
例如，在电动车辆中使用正负电源芯片，可以实现快速充电、长续航时间等优势。
这不仅可以减少用户的充电时间，还能提高电池的使用寿命，延长电池的循环充放电次数。
总之，正负电源芯片是一种重要的电池管理器件，它能够监控
电池的状态、提供电池的安全使用、实现电力管理和优化充放电效率。
随着移动设备、电动车辆等领域的快速发展，正负电源芯片也将进一步提升其功能和性能，为各种电池应用提供更加可靠、高效的解决方案。
双节锂电池充电芯片
双节锂电池充电芯片双节锂电池充电芯片（Dual-cell lithium-ion battery charging chip）是一种专门设计用于双节锂电池充电管理的集成电路芯片。
双节锂电池是一种由两节锂电池组成的电池组，通常用于高功率应用和需要更大能量密度的设备。
现如今，由于无线通信技术的快速发展以及移动设备的广泛应用，对电池的需求越来越大。
而双节锂电池由于其更高的能量密度和较小的尺寸，成为了无线通信设备中常用的电源。
为了保证双节锂电池的安全充电和更好地管理电池容量，需要使用专用的充电芯片。
双节锂电池充电芯片通常具有以下几个主要功能：1. 充电电流控制功能：双节锂电池充电芯片能够根据电池的状态和需求，自动调整充电电流。
这可以有效地保护电池不会过充或过放，延长电池的使用寿命。
2. 充电状态监测功能：双节锂电池充电芯片能够实时监测电池的充电状态，包括电压、电流和温度等参数。
通过监测这些参数，可以及时掌握电池的工作状态和健康情况，确保电池的正常运行。
3. 温度监测和保护功能：双节锂电池充电芯片具有温度监测和保护功能，可以监测电池的温度，并在温度过高时做出相应的控制，以防止电池过热引起安全问题。
4. 充电完成提示功能：当电池充满时，双节锂电池充电芯片可以发出充电完成提示信号，以提示用户及时拔掉充电器，避免过度充电。
5. 电池状态显示功能：双节锂电池充电芯片一般都有电池状态显示功能，可以通过LED指示灯或其他显示方式，显示电池的工作状态，方便用户了解电池的使用情况。
6. 快速充电功能：部分双节锂电池充电芯片还具备快速充电功能，可以在很短的时间内完成电池的充电，提高充电效率。
总之，双节锂电池充电芯片是用于双节锂电池充电管理的重要集成电路芯片，具有充电电流控制、充电状态监测、温度监测和保护、充电完成提示、电池状态显示等功能。
通过使用双节锂电池充电芯片，可以有效地保护电池安全，并延长电池的使用寿命。
PMU(PMIC)线性电源,开关电源
PMU（power management unit）就是电源管理单元，一种高集成的、针对便携式应用的电源管理方案，即将传统分立的若干类电源管理芯片，如低压差线性稳压器(LDO)、直流直流转换器(DC/DC)，但现在它们都被集成到手机的电源管理单元(PMU)中，这样可实现更高的电源转换效率和更低功耗，及更少的组件数以适应缩小的板级空间，成本更低。
PMU作为消费电子(手机、MP4、GPS、PDA等)特定主芯片配套的电源管理集成单元，能提供主芯片所需要的、所有的、多档次而各不相同电压的电源，同电压的能源供给不同的手机工作单元，像处理器、射频器件、相机模块等，使这些单元能够正常工作。
按主芯片需要而集成了电源管理，充电控制，开关机控制电路。
包括自适应的USB-Compatible的PWM充电器，多路直流直流转换器(BuckDC-DCConverter)，多路线性稳压器(LDO)，Charge Pump，RTC电路，马达驱动电路，LCD背光灯驱动电路，键盘背光灯驱动电路，键盘控制器，电压/电流/温度等多路12-BitADC，以及多路可配置的GPIO。
此外还整合了过/欠压(OVP/UVP)、过温(OTP)、过流(OCP)等保护电路。
高级的PMU可以在USB以及外部交流适配器、锂电池和应用系统负载之间安全透明的分配电能。
动态电源路径管理(DPPM)在系统和电池充电之间共享交流适配器电流，并在系统负载上升时自动减少充电电流。
调整充电电流和系统电流分配关系，最大程度保证系统的正常工作，当通过USB 端口充电时，如果输入电压降至防止USB 端口崩溃的阈值以下，则基于输入电压的动态电源管理(IDPM) 便减少输入电流。
当适配器无法提供峰值系统电流时，电源路径架构还允许电池补偿这类系统电流要求。
LDO是利用较低的工作压差，通过负反馈调整输出电压使之保持不变的稳压器件。
压差小的话用LDO，带可关断功能便于电源管理。
压差大的还是用DC-DC效率高。
双节串联锂电池充电管理芯片,充放电IC电路图
4. DC 直流 9V-20V 输入，降压 8.4V 给双节锂电池充电，充电电流最大 2A。提供了一 个充电常亮，充满灭灯的充电指示灯。
双节锂电池保护板电路图：
5.三个电路系统的组合电路图： 1，双节锂电池保护电路 PL7022 或者 HY2120， 2， 双节锂电池充电电路 PW4203， 3，双节锂电池输出 5V 电路 PW2162 或者 PW2163。
2.在产品设计和芯片应用中，锂电池的电路，离不开三大基本电路，来控制锂电池的充 电，放电。双节串联锂电池可以提供 6V-8.4V 的供电电压，双节串联锂电池充电管理 芯片也可以选择 5V 升压型的 PL7501C，和 9V-20V 降压型的 PW4203。
3.双节锂电池充电电路 USB 口常用的 5V 输入， 升压 8.4V 充双节锂电池充电。最大充 电电流 1A(电池端)。提供了一个充电常亮，充满灭灯的充电指示灯。
Байду номын сангаас
双节串联锂电池充电管理芯片，IC 整套电路图
1.概述 锂离子电池在如今是广泛应用存在我们生活中的方方面面的电子产品中。如，电子玩具， 美容仪，医疗产品，智能手表，手机，笔记本，电动汽车等等非常多。单节锂电池的供 电电压是 3V-4.2V 直接，而随着消费类电子产品的日新月异，对于功率的要求已经达 不到要求了。双节锂电池的供电电压 6-8.4V，在同样电流情况下，功率得到增加。才 能满足一些 20 多 W 等功率得输出应用。
双电源芯片
双电源芯片双电源芯片是一种具有双电压供应的集成电路芯片，可以同时接受两个不同电压等级的电源输入，并根据需要分配给各个部分的供电。
双电源芯片被广泛应用于各种电子设备中，可以提供更高的电源稳定性和可靠性。
双电源芯片的设计需要考虑多个方面的因素，包括电源输入的电压范围、电源电流需求、芯片内部电路的稳定性、供电电路的布局等。
为了满足这些要求，双电源芯片通常采用多级电源滤波和稳压电路，以确保电源输入的稳定性和纹波的可接受范围。
双电源芯片通常由多个功能部分组成，包括输入电源选择开关、电池管理电路、稳压电路、信号处理电路等。
输入电源选择开关用于选择并切换两个电源输入，使其分别供电给不同的部分。
电池管理电路负责管理电池的充电、放电和保护功能，以确保电池的安全和长寿命。
稳压电路用于生成各个部分所需要的稳定电压，以保证其正常工作。
信号处理电路则负责对输入信号进行处理和解码，最终输出电子设备所需的结果。
双电源芯片的应用非常广泛，涵盖了很多领域。
在手机和平板电脑等移动设备中，双电源芯片可以提供更高的电池寿命和更好的充电性能。
在工业自动化和机器人领域，双电源芯片可以保证设备在不同电压条件下的正常运行。
在医疗设备和仪器仪表中，双电源芯片可以提供更高的安全性和可靠性。
在通信设备和网络设备中，双电源芯片可以提供更好的电源稳定性和抗干扰能力。
双电源芯片的设计和制造需要高度的技术水平和严格的质量控制，以确保其性能和可靠性。
同时，双电源芯片的不断创新和进步也推动了整个电子行业的发展和进步。
未来，随着电子设备的不断发展和普及，双电源芯片还将继续发挥重要的作用，并不断提升其性能和功能。
综上所述，双电源芯片是一种具有双电压供应的集成电路芯片，可以提供更高的电源稳定性和可靠性。
它被广泛应用于各种电子设备中，包括手机、平板电脑、工业自动化、医疗设备、通信设备等。
双电源芯片的设计和制造需要高技术水平和严格的质量控制，未来还将继续发展和进步。
手机电源管理芯片
手机电源管理芯片手机电源管理芯片是指一种集成了多个电源管理功能的芯片。
它主要负责管理手机的电源供应、电池充电等功能，是保证手机正常运行和延长电池寿命的关键部件。
本文将从电源管理芯片的原理、功能和市场前景三方面进行介绍。
一、电源管理芯片的原理手机电源管理芯片是利用集成电路技术将多个功能模块集成在一起的芯片。
它通常包括电源管理单元、充放电管理单元、电池保护单元等。
电源管理单元用于对外部电源进行管理和选择，保证手机能够得到稳定的电压和电流供应。
充放电管理单元则负责对电池进行充电和放电控制，确保电池能够正常工作和延长其使用寿命。
电池保护单元则用于对电池进行监测和保护，防止过充、过放和短路等情况发生。
二、电源管理芯片的功能1. 电源控制：电源管理芯片可以对手机的电源进行控制和管理，保证电源供应的稳定性和安全性。
它可以根据手机的使用情况智能调整电源的输出电压和电流，提供最佳的供电环境。
2. 充电控制：电源管理芯片可以对手机的充电进行控制和管理。
它可以智能地调节充电电流和充电电压，确保充电速度和安全性。
同时，它还可以监测充电状态和电池温度，防止过充和过热等问题。
3. 电池保护：电源管理芯片还可以对电池进行保护。
它可以监测电池的电压和电流，防止过充和过放等情况发生。
同时，它还可以监测电池温度，当温度过高时会停止充电或降低充电速率，以保护电池不受损害。
4. 快充技术支持：现在的手机电源管理芯片可以支持快充技术，快速充电手机电池。
快充技术能够在短时间内将电池充满，提高手机的使用效率。
同时，快充技术也可以通过智能控制电池温度和充电电流，保护电池的安全性。
三、电源管理芯片的市场前景随着手机功能的不断增强和电池容量的提升，手机电源管理芯片的需求越来越大。
目前，电源管理芯片已经成为手机芯片的重要组成部分，几乎所有手机都使用了电源管理芯片。
而且，由于电池寿命和充电时间一直是用户关注的焦点，电源管理芯片也成为手机制造商竞争的一个重要方面。
电源管理芯片是什么_电源管理芯片介绍
电源管理芯片是什么_电源管理芯片介绍电源管理芯片（Power Management Integrated Circuits），是在电子设备系统中担负起对电能的变换、分配、检测及其他电能管理的职责的芯片。
主要负责识别CPU供电幅值，产生相应的短矩波，推动后级电路进行功率输出。
常用电源管理芯片有HIP6301、IS6537、RT9237、ADP3168、KA7500、TL494等。
主要电源管理芯片有的是双列直插芯片，而有的是表面贴装式封装，其中HIP630x系列芯片是比较经典的电源管理芯片，由著名芯片设计公司Intersil设计。
它支持两/三/四相供电，支持VRM9.0规范，电压输出范围是1.1V-1.85V，能为0.025V的间隔调整输出，开关频率高达80KHz，具有电源大、纹波小、内阻小等特点，能精密调整CPU供电电压。
电源管理芯片发展的必要性智能电源管理芯片的市场容量和发展前景所有电子设备都有电源，但是不同的系统对电源的要求不同。
为了发挥电子系统的最佳性能，需要选择最适合的电源管理方式。
首先，电子设备的核心是半导体芯片。
而为了提高电路的密度，芯片的特征尺寸始终朝着减小的趋势发展，电场强度随距离的减小而线性增加，如果电源电压还是原来的5V，产生的电场强度足以把芯片击穿。
所以，这样，电子系统对电源电压的要求就发生了变化，也就是需要不同的降压型电源。
为了在降压的同时保持高效率，一般会采用降压型开关电源。
同时，许多电子系统还需要高于供电电压的电源，比如在电池供电设备中，驱动液晶显示的背光电源，普通的白光LED驱动等，都需要对系统电源进行升压，这就需要用到升压型开关电源。
此外，现代电子系统正在向高速、高增益、高可靠性方向发展，电源上的微小干扰都对电子设备的性能有影响，这就需要在噪声、纹波等方面有优势的电源，需要对系统电源进行稳压、滤波等处理，这就需要用到线性电源。
上述不同的电源管理方式，可以通过相应的电源芯片，结合极少的外围元件，就能够实现。
什么是电源管理芯片如何设计电源管理芯片
什么是电源管理芯片如何设计电源管理芯片电源管理芯片是一种用于控制和管理电源供应的集成电路。
它在电子设备中起着关键的作用，能够提供稳定的电压和电流，保护设备免受过电流、电压等异常情况的损害。
本文将介绍电源管理芯片的定义、功能及设计原则。
一、电源管理芯片的定义电源管理芯片，简称PMIC（Power Management Integrated Circuit），是一款专门设计用于电子设备中的集成电路。
它能够控制和管理设备的电源供应，提供所需的电压和电流。
电源管理芯片通常包括多个子模块，如电源开关、电压调节器、电池充放电管理等，这些子模块共同协作，确保设备能够正常工作。
二、电源管理芯片的功能电源管理芯片具有多种功能，以下是其中几个常见的功能：1. 电源稳定性控制：电源管理芯片能够监测并保持电源输出稳定，防止电压波动对设备造成影响。
2. 电源开关控制：通过开关控制，电源管理芯片能够实现设备的开关机功能，降低功耗。
3. 充电管理：对于电池供电的设备，电源管理芯片能够监测电池电量，并控制充电和放电过程，保护电池免受过充、过放等情况的损害。
4. 温度监测和保护：电源管理芯片能够监测设备温度，并采取相应的措施，如关闭电源、降低电压等，以防止温度过高引起设备故障。
5. 供电切换：对于多种电源供应的设备，电源管理芯片能够实现供电切换，确保设备能够在不同电源条件下正常工作。
三、电源管理芯片的设计原则在设计电源管理芯片时，需要考虑以下几个原则：1. 稳定性：电源管理芯片应能够提供稳定的电压和电流，并具备良好的抗干扰能力，以确保设备的正常运行。
2. 效率：电源管理芯片应尽可能提高能量转换的效率，减少能量的损耗，降低设备的功耗水平。
3. 安全性：电源管理芯片应具备过流保护、过温保护、短路保护等功能，以保护设备和用户的安全。
4. 可靠性：电源管理芯片应具备良好的稳定性和可靠性，能够在各种环境条件下正常工作，并具备长寿命特性。
5. 整合性：电源管理芯片应具备集成度高、体积小等优势，以满足电子设备对空间的限制要求。
手机MTK芯片介绍大全
手机MTK芯片介绍大全联发科技是全球IC设计厂商之一，专注于无线通讯及数位媒体等技术领域。
本公司提供的晶片整合系统解决方案，包含无线通讯、高清数字电视、光储存、DVD及蓝光等相关产品，市场上均居领导地位。
联发科技成立于1997 年，公司总部设于台湾新竹科学工业园区笃行一路1号，并设有销售及研发团队于中国大陆、新加坡、印度、美国、日本、韩国、丹麦及英国。
2007年9月10日，联发科(MTK)宣布取得ADI手机芯片产品线。
手机基带芯片组:MT6205 只有GSM的基本功能。
MT6218 GSM+GPRS+WAP,MP3功能。
MT6217 为MT6218的简化版,功能一样,引脚一样.不可互换。
MT6219 GSM+GPRS+WAP,MP3，MP4功能，内置AIT的1.3M 照相IC。
MT6226 为MT6219 的简化版，内置0.3M 照相IC,功能一样.MT6226M 与MT6226功能基本一样，只是内置的是1.3M 照相ICMT6227 与MT6226功能基本一样，只是内置的是2.0M照相IC,引脚一样.不可互换MT6228 GPRS、WAP、MP3、MP4, TV OUT功能，内置300万像素的拍照功能MT6229 在6228的基础上多了个EDGE功能6223 GSM+GPRS基带处理,无MP3功能,不可外接TF卡，不支持照相; 内置电源管理6223p GSM+GPRS基带处理,有MP3功能,可外接TF卡，不支持照相; 内置电源管理6223c GSM+GPRS基带处理,有MP3功能,可外接TF卡，支持照相,内置电源管理MT6230 EDGE、GPRS、WAP、MP3、MP4, TV OUT功能内置130万像素的拍照功能MT6235 GSM GPRS、WAP、MP3、MP4, TV OUT功能， 200万像素的拍照功能,内置电源管理MT6238 GPRS+EDGE平台，集成更多多媒体芯片,系统强化了拍照、拍摄、音乐、运行速度等功能。