2022年2022年锂电充电-MP .pdf

《2022年2022年锂电充电-MP .pdf》由会员分享，可在线阅读，更多相关《2022年2022年锂电充电-MP .pdf（10页珍藏版）》请在淘文阁 - 分享文档赚钱的网站上搜索。

1、 MP26028 1A Linear Li-Ion Battery Charger with Trickle Charge MP26028 Rev.0.1 www.MonolithicP 112/14/2007 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. ? 2007 MPS. All Rights Reserved. The Future of Analog IC TechnologyDESCRIPTION The MP26028 is a linear, high-perfo

2、rmance single cell Li-Ion battery charger. By integrating high voltage input protection into the charger IC, the MP26028 can tolerate an input surge up to 20V. The device features constant current (CC) and constant voltage (CV) charging modes with programmable charge currents (85mA to 1A), programma

3、ble battery full threshold, thermal protection, battery temperature monitoring, reverse current blocking, and trickle charge. The device also provides AC adapter power good and charge status indications to the system. MP26028 is available in a 10-pin 3mm x 3mm QFN package. FEATURES?Input Surge Up to

4、 20V ?Adapter or USB Input ?Programmable Charge Current: 85mA to 1A ?Proprietary Constant Voltage Auto Recharge ? Proprietary Over-Voltage Protection ? 0.75% VBATT Accuracy ?1A Battery Reverse Current ?90A Standby Current from VIN?Battery Temperature Monitoring ? Over Current Protection ?AC Adapter

5、Power Good Indicator ?Charge Status Indicator ? Programmable Soft-Start ?Programmable Charge Termination Current Threshold ?Tiny 10-Pin QFN (3mm x 3mm) Package APPLICATIONS ? Cell Phones ? MP3 Players ? Smart Phones ? PDAs ? Digital Cameras “MPS ” and “The Future of Analog IC Technology” are Registe

6、red Trademarks of Monolithic Power Systems, Inc. TYPICAL APPLICATION MP26028BATTISETIBFSSGND109876INCHGACOKENVBIAS12345CIN1uF430 R1500k 430R2100kCSS0.1uFCOUT1uF - 22uFTo systemIBATTVBATT+_RBF20kRCHG2.3k3.5V - 20VOFFON名师资料总结 - - -精品资料欢迎下载 - - - - - - - - - - - - - - - - - - 名师精心整理 - - - - - - - 第 1 页

7、，共 10 页 - - - - - - - - - MP26028 1A LINEAR LI-ION BATTERY CHARGER WITH TRICKLE CHARGE MP26028 Rev.0.1 www.MonolithicP 212/14/2007 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. ? 2007 MPS. All Rights Reserved. PACKAGE REFERENCETOP VIEWINCHGACOKENVBIAS12345BATTISETIB

8、FSSGND109876EXPOSED PADON BACKSIDECONNECT TOGND PINPart Number* Package Temperature MP26028EQ QFN10 (3mm x 3mm) 20 C to +85 C* For Tape & Reel, add suffix Z (eg. MP26028EQ Z) For RoHS compliant packaging, add suffix LF (eg. MP26028EQ LFZ) ABSOLUTE MAXIMUM RATINGS (1)IN to GND.0.3V to +20V All Other

9、Pins to GND.0.3V to +6.5V Junction Temperature.140 C Lead Temperature.260 C Storage Temperature.65C to +150 C Recommended Operating Conditions (2)Nominal Supply Voltage VIN. 3.5V to 6.5V Operating Temperature.20 C to +85 C Thermal Resistance (3)JA JCQFN10 (3mm x 3mm).50. 12. C/W Notes: 1) Exceeding

10、these ratings may damage the device. 2) The device is not guaranteed to function outside of its operating conditions. 3) Measured on approximately 1” square of 1 oz copper. ELECTRICAL CHARACTERISTICS VIN = 5V, VEN = 0V, TA = +25 C, unless otherwise noted. Parameter Symbol Condition Min Typ Max Units

11、EN = High 40 Supply Current ISUPPLYEN = Low, ICHG = 0A 500 Over Input Voltage Protection OVP VINRise 6.8 7.0 7.2 V OVP Hysteresis 400 mV Maximum input voltage DC Leakage 500 A 20 V TA = +25 C, IBATT = 0 4.1794.20 4.221V Battery Voltage Regulation VBATTTA = 5C to +75 C, IBATT = 0 4.1584.20 4.242V Bat

12、tery Over-Voltage Protection IBATT_OVPVBATT = 4.25V 0 A Constant Current Regulation ICHGVIN = 5V, VBATT = 3.8V RCHG = 3.3k?450 515 580 mA Constant Current Variation VIN = 5V, VBATT = 3.8V, TJ = 0 C to +120 C, RCHG = 1.6 k ? to 8.0 k?87 100 113 %ICHG(4)Trickle Current VIN = 5V, VBATT = 2.3V 5 10 15 %

13、ICHG(4)Trickle Threshold Voltage 2.45 2.6 2.75 V Trickle Voltage Hysteresis 100 mV Battery Full Programming Range IBFRefer to Operation section for programming IBF10 50 %ICHG(4)IBF Accuracy 75 125 %IBF(5)SS Pin Voltage CSS = 0.1uF, VBATT = 3.6V 1.19 1.23 1.27 V Input ACOK Up Range 6.8 7.0 7.2 V Inpu

14、t ACOK Low Range 1.8 2.5 3.2 V 名师资料总结 - - -精品资料欢迎下载 - - - - - - - - - - - - - - - - - - 名师精心整理 - - - - - - - 第 2 页，共 10 页 - - - - - - - - - MP26028 1A LINEAR LI-ION BATTERY CHARGER WITH TRICKLE CHARGE MP26028 Rev.0.1 www.MonolithicP 312/14/2007 MPS Proprietary Information. Unauthorized Photocopy and

15、 Duplication Prohibited. ? 2007 MPS. All Rights Reserved. ELECTRICAL CHARACTERISTICS (continued)VIN = 5V, VEN = 0V, TA = +25 C, unless otherwise noted. Parameter Symbol Condition Min Typ Max UnitsEN Trip Threshold High 2.4 V EN Trip Threshold Low 0.4 V CHG , ACOK Sink Current Pin Voltage = 0.4V 8 mA

16、 Battery Reverse Current to BATT Pin EN = Low and Input = Floating or 0V 1 A Switch-On Resistance RONVBATT = 3.8V, IBATT = 300mA, RCHG = 1.7k? 0.35 ?Soft Thermal Shutdown Threshold 105 120 135 C Soft Thermal Shutdown Hysteresis 10 C Soft-Start Time From trickle to 90% of full current, CSS = 0.1F 10

17、20 35 ms Notes: 4) ICHG is the target preprogrammed charge current (Die temperature below 110C). 5) IBF is the target preprogrammed battery full current threshold. PIN FUNCTIONS Pin # Name Description 1 IN Input Supply Pin. IN receives the AC adapter or USB supply voltage. 2 CHGOpen-Drain Charge Sta

18、tus Indicator. This pin is low during charging. 3 ACOKOpen-Drain Input ACOK Indicator. This pin is low if the voltage at the IN pin is between 2.5V and 6.5V. 4 ENCharger IC Enable. An input “Low” signal at this pin or if the pin is floating will enable the IC. 5 VBIASBias Voltage for internal circui

19、try. To generate the bias voltage, connect a 500k? resistor (R1) from this pin to the IN pin and a 100k? resistor (R2) from this pin to ground. Shown in Typical Application circuit on front page 6 Exposed Pad GND Ground. Connect exposed pad to the GND pin 7 SS Soft-Start Timer. Connect this pin to a

20、n external capacitor to program the soft-start startup time using the equation: secm20F1.0CTSSSS=. 8 IBF Charge Status Threshold Program. Connect this pin to an external resistor to program the charge termination current or battery full charge current. 9 ISET Constant Charge Current Program. Connect

21、 this pin to an external resistor to program the charging current in CC Mode. 10 BATT Charger Output. 名师资料总结 - - -精品资料欢迎下载 - - - - - - - - - - - - - - - - - - 名师精心整理 - - - - - - - 第 3 页，共 10 页 - - - - - - - - - MP26028 1A LINEAR LI-ION BATTERY CHARGER WITH TRICKLE CHARGE MP26028 Rev.0.1 www.Monolith

22、icP 412/14/2007 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. ? 2007 MPS. All Rights Reserved. TYPICAL PERFORMANCE CHARACTERISTICS VIN = 5V, CIN = 10 F, COUT = 4.7F, TA = +25 C, unless otherwise noted. 4.54.34.13.93.73.5BATTERYVOLTAGE(V)4.54.85.15.45.86.0INPUT VOLTA

23、GE (V)Battery Voltage vsInput VoltageICHG=0.43A0.90.80.70.60.50.40.30.20.104.54.03.53.02.52.01.51.00.50CHARGECURRENT(A)BATTERYVOLTAGE(A)04080120160200CHARGE TIME (MINUTES)Battery Charge CurveVBATTIBATT1100900700500300100CHARGECURRENT(mA)2.72.93.13.33.53.73.94.1BATTERY VOLTAGE (V)Charge Currents vsBa

24、ttery Voltage1.0A0.5A0.2A1.21.00.80.60.40.20CHARGECURRENT(A)0.01.02.03.04.0BATTERY VOLTAGE (V)Charge Current vsBattery VoltageVIN5V/div.VBATT2V/div.IBATT0.5A/div.VEN5V/div.VIN5V/div.VBATT2V/div.IBATT0.5A/div.VEN5V/div.2ms/div.名师资料总结 - - -精品资料欢迎下载 - - - - - - - - - - - - - - - - - - 名师精心整理 - - - - -

25、- - 第 4 页，共 10 页 - - - - - - - - - MP26028 1A LINEAR LI-ION BATTERY CHARGER WITH TRICKLE CHARGE MP26028 Rev.0.1 www.MonolithicP 512/14/2007 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. ? 2007 MPS. All Rights Reserved. TYPICAL PERFORMANCE CHARACTERISTICS (continued)

26、VIN = 5V, CIN = 10 F, COUT = 4.7F, TA = +25 C, unless otherwise noted. VIN=0VVBAT=4.1VVBAT=4V120010008006004002000CHARGECURRENT(mA)4.34.44.54.64.84.74.95.0INPUT VOLTAGE (V)Charge Current vsInput Voltage0.60.50.40.30.20.102.52.93.33.74.14.5BATTERY VOLTAGE (V)740720700680660640620600CHARGECURRENT(mA)-

27、50-250+25+50+75-50-250+25+50+75TEMPERATURE ( C)4.304.264.224.184.144.10BATTERYVOLTAGE(V)TEMPERATURE ( C)Reverse Current vsBattery Voltage161412108642002004006008001000CHARGE CURRENT (mA)Charge Current vsRCHG ResistanceCharge Current vsTemperatureVBATT = 3.8VBattery Voltage vsTemperatureICHG = 15mA名师

28、资料总结 - - -精品资料欢迎下载 - - - - - - - - - - - - - - - - - - 名师精心整理 - - - - - - - 第 5 页，共 10 页 - - - - - - - - - MP26028 1A LINEAR LI-ION BATTERY CHARGER WITH TRICKLE CHARGE MP26028 Rev.0.1 www.MonolithicP 612/14/2007 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. ? 2007 M

29、PS. All Rights Reserved. BLOCK DIAGRAM BATTERYCHARGECONTROL79851102364SSISETIBFVBIASR2CSSRCHGRBFR1INBATTCHGACOKGNDENVINCINCOUTVBATT+_OFFONIBATTFigure 1Functional Block Diagram OPERATION Input Voltage Range The MP26028 has built-in input voltage surge protection up to +20V. The charger IC will be aut

30、omatically disabled when the input voltage is lower than 2.5V or higher than 6.5V. The open-drain pin ACOKis used to indicate an input power good condition (i.e. 2.5VVIN CC- CV) Figure 2 below shows the typical charging profile for the MP26028. Figure 3 shows the typical charging procedure. For a fu

31、lly depleted battery with a terminal voltage lower than 2.6V, the MP26028 will start with the trickle charge (preconditioning) at 10% of the programmed full charge current. After the battery voltage reaches 2.6V, the charger begins charging at the constant current of the programmed value (ICHG). Thi

32、s is referred to as Constant Current (CC) mode. Once the battery voltage reaches 4.2V, the charger will operate in the constant voltage (CV) mode until the battery is fully charged. The charge current drops during CV mode, and the battery full indication is set when the charge current in the CV mode

33、 is reduced to the programmed full battery current (IBF). 名师资料总结 - - -精品资料欢迎下载 - - - - - - - - - - - - - - - - - - 名师精心整理 - - - - - - - 第 6 页，共 10 页 - - - - - - - - - MP26028 1A LINEAR LI-ION BATTERY CHARGER WITH TRICKLE CHARGE MP26028 Rev.0.1 www.MonolithicP 712/14/2007 MPS Proprietary Information.

34、 Unauthorized Photocopy and Duplication Prohibited. ? 2007 MPS. All Rights Reserved. 2.6V4.2VVBATT10% of ICHGIBFTrickleChargingCCChargingChargingCompleteCVChargingICHGIBATTFigure 2Typical Charging Profile TrickleChargingChargeStartChargeEndSoft-StartTimeCCModeCVMode10% of ICHG (IBF)90% of ICHGICHG2.

35、6V4.2VVBATTVBATTIBATTIBATTCHGFigure 3Typical Charging Procedure Battery Over-Voltage Protection and Automatic Recharge At any time when VBATT is 50mV higher than the trimmed charge target, the MP26028 reduces its charge current to 0A. This ensures the safety of the battery. Also, the CV control loop

36、 always monitors the battery voltage such that it will automatically recharge the battery when it is depleted below the target level. Programming of Charge Current and Battery Full Current The charge current (ICHG) is set by a resistor (RCHG) connecting from the ISET pin to GND. See Table 1 and Figu

37、re 4. The relationship of the charge current and the programming resistance is established by: CHRCHGRk7.1I= (A) RCHG (k? ) ICHG (mA) 2.32 700 2.74 600 3.3 500 4.12 400 5.6 300 Table 1 RPGM and ICHG Relationship Charge Current vs1/RPGM Resistance 1000900800700600500400300200CHARGECURRENT(mA)00.20.10

38、.30.40.60.70.5Figure 4Charge Current vs 1/RPGMResistance The recommended resistance for programming the charge current is 2.3k? RCHG11k? . The battery full charge current threshold (IBF) is programmed by connecting a resistor RBF from the IBF pin to GND: BFBFRk7.1A1I=Where 2RCHGRBF10RCHG. The open-d

39、rain pin CHG is used to indicate charging status. When the battery full condition is reached or any other condition prevents the charger from charging, CHG will become a floating pin. 名师资料总结 - - -精品资料欢迎下载 - - - - - - - - - - - - - - - - - - 名师精心整理 - - - - - - - 第 7 页，共 10 页 - - - - - - - - - MP26028

40、 1A LINEAR LI-ION BATTERY CHARGER WITH TRICKLE CHARGE MP26028 Rev.0.1 www.MonolithicP 812/14/2007 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. ? 2007 MPS. All Rights Reserved. Charge Status Indicator (CHG)The MP26028 has an integrated charge status pin that remains

41、 low while the battery is charging. Once the charge current has reduced to the battery full charge current threshold (IBF), the CHG pin will become high impedance. The ACOK and CHGcan be used to drive LEDs ( Figure 1) or to interface with the system. When interfacing with the system, glitches may oc

42、cur on the power supply input (IN) when the AC-power adapter is plugged in and out. It is desirable to blank the glitches so that the system can properly operate with AC power adaptor. A simple Solution is to add the RC filter (C5 and C6)on the pin ACOK/CHG as shown in Figure 5. The size of C5 and C

43、6 depends on the width of the glitch and the rise time of the interface. Thermal Protection The MP26028 has proprietary thermal protection to prevent the IC from overheating. When in thermal protection mode, the charge current becomes a saw-tooth waveform instead of a DC current. The average current

44、 of the saw-tooth waveform will be lower than the programmed DC charge current to prevent the IC from overheating. The frequency and amplitude of the saw-tooth current waveform can be altered by changing the capacitance value connected to the SS pin. Operating in thermal protection mode will slow do

45、wn the charging process. Lowering the input voltage and enhancing thermal dissipation to the environment can effectively prevent the IC from going into thermal protection mode. Figure 5Filtered Charge Status & Input Power Good Interface 名师资料总结 - - -精品资料欢迎下载 - - - - - - - - - - - - - - - - - - 名师精心整理

46、 - - - - - - - 第 8 页，共 10 页 - - - - - - - - - MP26028 1A LINEAR LI-ION BATTERY CHARGER WITH TRICKLE CHARGE MP26028 Rev.0.1 www.MonolithicP 912/14/2007 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. ? 2007 MPS. All Rights Reserved. APPLICATION Flow Chart of Operation

47、Power-On Reset (POR) feature can be applied to the MP26028 to ensure that the device starts operating in a known state. The flow chart in Figure 5 describes the conditions and operation modes of the MP26028. CVC and CCC stand for “constant voltage charge” and “constant current charge”, respectively.

48、 YES.J4.?YESFigure 6Flow Chart of Operation 名师资料总结 - - -精品资料欢迎下载 - - - - - - - - - - - - - - - - - - 名师精心整理 - - - - - - - 第 9 页，共 10 页 - - - - - - - - - MP26028 1A LINEAR LI-ION BATTERY CHARGER WITH TRICKLE CHARGE NOTICE: The information in this document is subject to change without notice. Users sh

49、ould warrant and guarantee that third party Intellectual Property rights are not infringed upon when integrating MPS products into any application. MPS will not assume any legal responsibility for any said applications. MP26028 Rev. 0.1 www.MonolithicP 1012/14/2007 MPS Proprietary Information. Unaut

50、horized Photocopy and Duplication Prohibited. ? 2007 MPS. All Rights Reserved. PACKAGE INFORMATION QFN10 (3mm x 3mm) SIDE VIEWTOP VIEW11065BOTTOM VIEW2.903.101.451.752.903.102.252.550.50BSC0.180.300.801.000.000.050.20 REFPIN 1 IDMARKING1.700.500.25RECOMMENDED LAND PATTERN2.90NOTE: 1) ALL DIMENSIONS