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| MP2607 li + linear charger withsystem power path management MP2607 rev. 1.02 www.monolithicpower.com 1 6/19/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. the future of analog ic technology description MP2607 is a highly-integrated single-cell li- ion/li-polymer battery charger with system power path management function. it takes input from either ac adapter or usb port to supply the system and charge the battery independently. the charger section features trickle charge, high-accuracy constant current (cc) and constant voltage (cv) regulation, charge termination and charge status. the system power path management function ensures continuous supply to the system by automatically selecting the input, the battery or both to power the system. this section features a low drop-out regulator from input to system, and a 50m ? switch from battery to system. power path management separates charging current from system load, which allows proper charge termination and keeps battery stay fully- charged. it also allows instantaneous power up of system with a deeply discharged battery. MP2607 is available in 14pin 3mm*4mm qfn package. features ? fully autonomous charger for single-cell li-ion/polymer batteries ? selectable input power sources from ac adapter or usb port ? built-in current limit for usb port ? complete power path management for simultaneously powering the system and charging the battery ? 0.75% charging voltage accuracy ? 12v maximum voltage for the input source ? programmable charging current ? built-in timer for charge termination ? no external blocking diode required ? tiny qfn14 (3mm x 4mm) package applications ? smart handheld devices ? cell phones, pdas, mp3 players ? digital cameras, gps ? handheld test equipment all mps parts are lead-free and adhere to the rohs directive. for mps green status, please visit mps website under products, quality assurance page. ?mps? and ?the future of analog ic technology? are registered trademarks o f monolithic power systems, inc. typical application
MP2607 ? li-ion charger with power path management MP2607 rev. 1.02 www.monolithicpower.com 2 6/19/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. ordering information part number* package top marking free air temperature (t a ) MP2607dl qfn14 (3mm x 4mm) 2607 -40 c to +85 c * for tape & reel, add suffix ?z (e.g. MP2607dl ?z); for rohs compliant packaging, add suffix ?lf; (e.g. MP2607dl ?lf?z) package reference top view absolute maxi mum ratings (1) v in ..................................................-0.3v to 13v v sys ? v batt .........................................-5v to 5v all other pins ................................-0.3v to 6.5 v continuous power dissipation (t a = +25c) (2) ............................................................. 3.1w junction temperature ...............................150 c lead temperature ....................................260 c storage temperature................. -65c to 150 c recommended operating conditions (3) supply voltage v in ...... 4.51v to 5.9v (ac input) 4.51v to 6.27v (usb input) output voltage v batt .......................3.0v to 4.5v operating junct. temp (t j )...... -40 c to +125 c thermal resistance (4) ja jc qfn14 (3mm x 4mm) ............. 40 ....... 6.... c/w notes: 1) exceeding these ratings may damage the device. 2) the maximum allowable power dissipation is a function of the maximum junction temperature t j (max), the junction-to- ambient thermal resistance ja , and the ambient temperature t a . the maximum allowable continuous power dissipation at any ambient temperature is calculated by p d (max)=(t j (max)- t a )/ ja . exceeding the maximum allowable power dissipation will cause excessive die temperature, and the regulator will go into thermal shutdown. internal thermal shutdown circuitry protects the device from permanent damage. 3) the device is not guaranteed to function outside of its operating conditions. 4) measured on jesd51-7 4 layers board. MP2607 ? li-ion charger with power path management MP2607 rev. 1.02 www.monolithicpower.com 3 6/19/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. electrical characteristics (5) v in = 5.5v, v batt = 3.5v, v ceb = gnd, t a = 25 c, unless otherwise noted. parameter symbol condition min typ max units in input voltage v in 4.51 12 v v in_ov_ac mode = 5v 5.9 in input over voltage threshold v in_ov_us mode = gnd 6.27 v ac mode, mode = 5v 260 in input over voltage hysteresis usb mode, mode=gnd 310 mv input undervoltage threshold v in_uv input rising threshold 4.25 4.38 4.51 v ac mode, mode = 5v 520 input undervoltage threshold hysteresis usb mode, mode = gnd 150 mv input vs. battery threshold v in_bat input rising vs. battery 120 mv input vs. battery threshold hysteresis 70 mv batt undervoltage threshold v uv_bat batt voltage rising 2.4 2.8 3.2 v batt undervoltage threshold hysteresis 200 mv power path management ac regulator out voltage v ac_reg v in = 5.5v, mode = 5v 4.65 4.85 5.05 v ac regulator current limit i ac_max v in = 5v, mode = 5v 1.4 2 2.6 a usb input current limit i usb_max mode = gnd, v in = 5v, v batt =4v 410 450 490 ma mode > v mode , ac adapter 1.5 input selection threshold v mode mode < v mode , usb port 0.3 v i sys +i chg < adapter current limit, i sys =100ma 4.85 v in = 5.5v mode = 5v i sys +i chg > adapter current limit, i sy s =400ma 4.2 i sys +i chg < usb port current limit, i sys =100ma 4.93 v in = 5v, mode=gnd i sys > usb port current limit, v batt =3.5v 3.4 sys output voltage v sys v in = 3.5v, v batt =3.2v (v batt rising edge) 3.2 v in to sys switch on resistance r on_sys i sys (400ma)+i chg > i _ a dapter, mode = 5v 300 450 m ? MP2607 ? li-ion charger with power path management MP2607 rev. 1.02 www.monolithicpower.com 4 6/19/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. electrical characteristics (5) (continued) v in = 5.5v, v batt = 3.5v, v ceb = gnd, t a = 25 c, unless otherwise noted. parameter symbol condition min typ max units ceb = gnd, i chg = 0a, i sys = 0a, v batt =4.5v , v in = 5.5v, mode = 5v 420 ceb = gnd, i chg = 0a, i sys = 0a, v batt =4.5v, v in = 5.5v, mode = gnd 400 a ceb = 5v, i chg = 0a, i sys = 0a, v batt =4.5v, v in = 5.5v 120 a supply current at input i in ceb = 5v, i chg = 0a, i sys = 0a, v batt =4.5v, v in = 12v 1.4 ma v in =5.5v , v batt =4.5v 125 ceb = gnd, i sys =0a v in = 4v, v batt =4.5v 25 35 a supply current at batt input i batt ceb = 5v, i sys = 0a, v batt =3.5v 20 30 batt input to sys switch on resistance r on_bsw v in =gnd, v batt =3.5v, i sys =100ma 50 80 m ? batt input to sys switch on voltage drop v d_bsw v batt =3.5v, i sys =600ma, v in =5v (battery supplement mode), ceb = gnd, mode = gnd 40 100 160 mv batt to sys short protection current i batt_max v batt =3.5v, v sys =gnd, ceb =5v (guaranteed by design) 300 ma batt to sys switch leakage v batt =2.3v , v in = v sys = gnd , ceb =5v 1 a sys reverse to batt switch leakage v sys =5v , v in = v batt =gnd , ceb =5v 1 a charger t = +25c, i batt = 0 4.179 4.20 4.221 t = 0c to +50c, i batt = 0 4.168 4.20 4.232 battery voltage regulation v batt t = ?5c to +75c, i batt = 0 4.158 4.20 4.242 v in to batt switch on resistance r on_batt v in =4.3v, v batt = 4.165v , i chg =1a 200 400 m ? v in = 5v, v batt = 3.5v, mode = 5v r chg = 2.263k ? 880 1000 1120 ma constant current regulation for charging i chg v in = 5v, v batt = 3.5v, mode = gnd r chg = 7.6k ? 210 300 390 ma programmable charge current i chg v in = 5v, v batt = 3.5v, mode = 5v 1.5 (5) a MP2607 ? li-ion charger with power path management MP2607 rev. 1.02 www.monolithicpower.com 5 6/19/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. electrical characteristics (5) (continued) v in = 5.5v, v batt = 3.5v, v ceb = gnd, t a = 25 c, unless otherwise noted. parameter symbol condition min typ max units charging current thermal fold-back threshold 105 120 135 c v sys = 5v, v batt = 3.5v 1.5k ? < r chg < 7.6k ? -12 12 constant current variation for charging i chg 7.6k ? < r chg < 22k ? -30 30 % i chg trickle charge current (7) i trkl v batt = 2.0v, r chg = 2.263k ? 5 8.5 12 % i chg r chg = 2.263k ? (1a i chg ) 7 10 13 % i chg end of charge (eoc) current threshold (8) i eoc r chg = 22.6k ? (100ma ichg) 9 15 25 ma voltage at ichset pin v ichset 1.5k ? < r chg < 4.5k ? r chg *i c hg /201 6 r chg *i c hg /180 0 r chg *i c hg /158 4 v trickle threshold voltage v th_trkl v batt rising 2.7 2.8 2.9 v trickle voltage hysteresis 190 mv auto re-charge fall threshold v rechg v batt falling 3.95 4.05 4.15 v ceb threshold 0.3 v ceb threshold 2 v ceb pin pull-up resistor 1 m ? stat1 , stat2 sink current pin voltage = 0.3v 8 ma battery reverse current to in pin in pin grounded, v batt = 4.3v 1 a c tmr =1f, r chg =2.263k ? (1a i chg ) 1.1 hour timer for charging tmr_f c tmr =1f, r chg =22.6k ? (100ma i chg ) 8.4 hour c tmr_f 2 17 timer count c tmr_t 2 15 r chg = 2.263k ? (1a i chg ) -20 20 % timer accuracy r chg = 22.6k ? (100ma i chg ) -40 40 % ntc pin output current i ntc ceb = gnd -100 0 100 na v th_lt ambient temp = 0c 58 60 62 %v in temperature fault threshold voltage v th_ht ambient temp = 50c 28 30 32 %v in notes: 5) min. vin is determined by internal uvlo and relative to batt voltage 6) high charge current make MP2607 get into t hermal fold-back and charge current will drop down. 7) i chg is the target preprogrammed charge current (die temperature below 110c), i.e. typical value of i chg . 8) i eoc is the target preprogrammed battery full current threshold, i.e. typical value of i eoc . MP2607 ? li-ion charger with power path management MP2607 rev. 1.02 www.monolithicpower.com 6 6/19/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. pin functions pin # name i/o description 1, 2 batt i/o connected to battery 3 mode i input select for ac adapter or usb port 4 ichset o connected to an external resistor to set charging current ichg 5 tmr i program pin to set timer for the charger with an external capacitor; 470nf equivalents to 1 hour if r chg is 4.2k ? 6 ceb i enable pin for MP2607. ceb high (>2v) disables in (ac or usb) regulation path and charger, the system is supplied only from battery 7 gnd power ground 8 ntc o battery temperature sense pin, conn ected to the thermist or of battery pack 9 stat2 o 10 stat1 o charging status indication pin: 1. char ging; 2. end of charge; 3. charge suspend; 4. fault 11, 12 in power input for ac adapter or usb port 13, 14 sys power system power supply. MP2607 ? li-ion charger with power path management MP2607 rev. 1.02 www.monolithicpower.com 7 6/19/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. typical performance curves v in =5.5v, c in =4.7f, c sys =10f, c bat =4.7f, t a =25c, unless otherwise noted. cc charge current vs. temperature 1200 1000 800 600 400 200 0 cc charge current vs. input voltage v bat (v) v in (v) charge current vs . battery voltage i chg vs. 1/r chg v bat (v) v bat (v) i chg (ma) i chg (ma) i chg (ma) i chg (ma) i chg (ma) time (min) battery charge curve v bat i chg v in 2v/div. v bat 1v/div. i sys 0.5a/div. i bat 0.5a/div. i in 0.5a/div. v sys 2v/div. v bat 2v/div. v bat 2v/div. i sys 0.5a/div. i sys 0.5a/div. i bat 0.5a/div. i bat 0.5a/div. i in 0.2a/div. i in 0.2a/div. 4s/div. 4s/div. 10s/div. v bat cv regulation voltage vs. temperature power path management mode=1, 1.5a source current limit, w/ battery power path management mode=0, w/ battery power path management mode=0, w/ battery 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 020406080 0 100 200 300 400 500 600 700 0 100 200 300 400 500 600 700 800 2 2.5 3 3.5 4 4.5 4.5 4.8 5.1 5.4 5.7 6 0 200 400 600 800 1000 1200 1400 0 0.1 0.2 0.3 0.4 0.5 0.6 temperature ( c) temperature ( c) 0 100 200 300 400 500 600 700 -50 -30 -10 10 30 50 70 90 3.8 3.9 4 4.1 4.2 4.3 -40-20 0 20406080 rchg=2.21k rchg=3.6k rchg=8.66k thermal fold back mode=1, rchg=3.6k m ode=1, rch g =8.66k m ode=0, rch g =3.6k mode=1 mode=0 MP2607 ? li-ion charger with power path management MP2607 rev. 1.02 www.monolithicpower.com 8 6/19/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. typical performance curves (continued) v in =5.5v, c in =4.7f, c sys =10f, c bat =4.7f, t a =25c, unless otherwise noted. enable control on mode=1, w/o battery enable control on mode=1, r chg =3.6k, w/ battery enable control on mode=0, r chg =3.6k, w/ battery v in 2v/div v bat 2v/div v sys 2v/div i sys 0.5a/div v in 2v/div v bat 2v/div v bat 2v/div v sys 2v/div v sys 2v/div i sys 1a/div v in 2v/div v bat 2v/div v sys 2v/div i bat 1a/div v in 2v/div v bat 2v/div v sys 2v/div i bat 0.2a/div v in 2v/div v bat 2v/div v sys 2v/div i bat 0.2a/div v in 2v/div v bat 2v/div v sys 2v/div i bat 0.2a/div v ceb 2v/div i sys 1a/div v bat 2v/div v sys 2v/div v ceb 2v/div i bat 1a/div v bat 2v/div v sys 2v/div v ceb 2v/div i bat 0.2a/div 200ms/div 200ms/div 200ms/div 10ms/div 10ms/div 10ms/div 10ms/div 10ms/div 10ms/div power on mode=1, r chg =3.6k, w/o battery power off mode=1, w/o battery power on mode=1, r chg =3.6k, w/ battery power off mode=1, r chg =3.6k, w/ battery power off mode=0, r chg =3.6k, w/ battery power on mode=0, r chg =3.6k, w/ battery MP2607 ? li-ion charger with power path management MP2607 rev. 1.02 www.monolithicpower.com 9 6/19/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. typical performance curves (continued) v in =5.5v, c in =4.7f, c sys =10f, c bat =4.7f, t a =25c, unless otherwise noted. input ovp recovery v in from 6v to 5v, mode=1, r chg =3.6k, w/ battery input ovp v in from 5v to 6v, mode=1, r chg =3.6k, w/ battery input selection r chg =3.6k, w/ battery enable control off mode=0, r chg =3.6k, w/ battery enable control off mode=1, r chg =3.6k, w/ battery enable control off mode=1, w/o battery v in 2v/div v sys 1v/div i bat 0.2a/div i bat 0.2a/div v bat 1v/div v in 5v/div v sys 1v/div i bat 0.2a/div v mode 0.2v/div v in 1v/div v sys 1v/div v mode =0.65v i bat 0.2a/div v bat 2v/div v sys 2v/div v ceb 2v/div v bat 2v/div i bat 1a/div v sys 2v/div v ceb 2v/div v bat 2v/div i sys 1a/div v sys 2v/div v ceb 2v/div v bat 2v/div 200ms/div 40ms/div 40ms/div 10ms/div 10ms/div 10ms/div MP2607 ? li-ion charger with power path management MP2607 rev. 1.02 www.monolithicpower.com 10 6/19/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. block diagram in mode ichset batt sys tmr ntc vin regulator 1. for ac: vout = 5v coarse current limit = 2a 2. for usb: vout=vin accurate current limit set internally to 450ma typ. references &bias battery charge control trickle charge cc/cv regulation thermal regulation programmable i ch dynamic i ch adjustment auto-recharge time-out temination 2.8v 4.05v re_chg trickle_chg 4.3v i ch foldback for current limited ac vin uvlo time out counter en batt battery switch control & 2x charge pump constant v d_bsw constant r on_bsw current limit mp1sen mp2 mnsw nsw_on charger status decoder battery uvlo temp_ok en vbat_good gnd ac adaptor or usb port r chset c tmr r thm system 10mv comp sys MP2607 ? li-ion charger with power path management MP2607 rev. 1.02 www.monolithicpower.com 12 6/19/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. charging current usb port current sys load current batt voltage sys voltage battery supplements load figure 3?power path management for usb mode power path management allows use of lower current limited sources while still provides continuous system supply and optimal battery charging at the same time. usb mode input switch current limit when in is connected to an usb port, the switch between in and sys has a built-in current limit that is set by an internal resistor with typical value of 450ma. post-package trimming keeps the variation within +-5%. charging current thermal fold-back MP2607 has internal monitoring circuit that will reduce the charging current if the chip junction temperature reaches 120c. this prevents overheat of the chip and avoids unnecessary thermal shutdown. floating charging voltage the floating voltage for the constant voltage regulation phase is 4.2v. it has 0.75% accuracy over the ambient temperature range of -10c to +70c. auto recharge MP2607 automatically recharge the battery if batt pin voltage falls below a predetermined threshold v rechg . this allows the battery to always stay at full or near full condition, increasing the battery life. status indication output stat1 and stat1 are two open-drain nmos outputs which should be connected to pull-up resistors to sys output or desired supply rail. their output logic level combinations are used to indicate 4 status of the charger: regardless of the charger status, however, the charger does not turn off as long as a valid input power source is attached. charger status stat1 stat2 charging low low end of charge low high charge suspended (due to battery supplement mode or ntc out of range) high low fault/disable (due to time-out, internal thermal shutdown), en >2v, or no vin high high ntc temperature sensor the ntc pin allows MP2607 to sense the ambient temperature using the negative thermal coefficient (ntc) thermistor usually available in the battery pack to ensure a safe operating environment of the battery. a resistor with appropriate value should be connected from vin to ntc and the ntc resistor parallel connected a regular resistor is connected form ntc pin to ground. the voltage on ntc pin is determined by the resistor divider whose divide ratio depends on the ambient temperature. MP2607 internally sets a pre-determined upper and lower bound of the divide ratio. if ntc pin voltage falls out of this range which means the temperature is outside the safe operating range, MP2607 will stop charging and report it on status pins. charging will automatically resume after the temperature falls back into the safe range. enable enable of MP2607 is controlled by pulling ceb pin below 0.3v. pulling ceb pin above 2v will put MP2607 in sleep mode, which disables power path management and battery charger. in sleep mode, the n-channel switch between batt and sys is fully on to maintain system supply. battery under-voltage and current limit are kept alive to provide safeguard. MP2607 ? li-ion charger with power path management MP2607 rev. 1.02 www.monolithicpower.com 13 6/19/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. application information component selection battery charging current the charging current of MP2607 is programmable using an external resistor r chg at ichset pin: ) ( = chg chg r 1.260v 1800 i where 1.260v is an internal reference voltage for ichset programming. typically r chg is chosen between 1.51k ? (1.50a i chg ) and 7.5k ? (300ma i chg ). however, due to current limit constraint at the input source, either adapter or usb port input, the charging current could be less than above calculated value if system load demand is high. MP2607 will always ensure the sum of system load current and charging current complies with source current limit, wi th system load has the priority. especially for usb mode, when system load exceeds the source current limit, charging is actually stopped and battery is pulled in to supplement the system load. when using usb port as input source, if the charging current is set higher than usb port current limit i usb_max , then the real charging current will not be higher than usb current limit and could be reduced further if system draws any load. end of charge threshold current the end of charge threshold current is set internally to be at 10% of i chg : ) ( r 1.260v 180 i chg eoc = where 1.260v is an internal reference voltage and r chg is the programming resistor at ichset pin. when the charging current falls below i eoc in cv charge mode, MP2607 will terminate charge, and latch the status pin to indicate the end of charge. trickle charge current when the battery voltage is below the minimum battery voltage v th_trkl (defined in the electrical characteristics table), the charger operates in a trickle/preconditioning mode, where the charging current is typically 7.5% of the programmed charge current i chg . ) ( = chg trkl r 1.260v 150 i timer for charge termination MP2607 has a built-in timer to terminate the charge if the timer times out, no matter whether i eoc is reached or not. and once the battery is charged full, the timer is reset. this timer is programmable using an external capacitor c tmr at tmr pin, to allow user adjust to different battery capacity. the timer can be calculated as: tmr tmr_f chg c 2 a 1a/36000 1.1hours 2 a i /36000 1 f + = + the timer period is strictly inversely proportional to the real charging current (either in power path state or cv charge mode), the sink and source current of c tmr is 36000 / ichg a 2 + . so, the trickle charge timer can be calculated based on the tmr_f : /36000 i a 2 /36000 i a 2 2 2 trkl chg 17 15 tmr_f tmr_t + + = due to the power path management function, the real charging current usually varies during the whole charging process, thus MP2607 automatically takes into account this variation and adjust the timer time out accordingly. basically the timer increases the same proportion as the charging current decreases. if the charging is stopped due to high system load, the timer is temporarily suspended. in this way, the actual energy delivered to the battery, which is charging current multiplying the charging time, remains constant. the time out operation will set the charger into suspended state and be reported at the status output pins. to clear the time out status, one has to recycle the chip enable pin or in supply. MP2607 ? li-ion charger with power path management MP2607 rev. 1.02 www.monolithicpower.com 14 6/19/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. resistor choose for ntc sensor ntc pin uses a resistor divider from input source (in) to sense the ambient temperature. the two resistors r t1 and r t2 allow the high temperature limit and low temperature limit to be programmed independently. in another word, MP2607 can fit most type of ntc resistor and different temperature operation range requirement with the two extra resistors. r t1 and r t2 values depend on the type of the ntc resistor: () = ? = ntch ntcl t2 ntcl ntch t1 t2 ntcl 0.3 r r r 0.12 r 0.42 r r 0.667 r / /r r ntch is the value of the ntc resistor at high temperature of the required temperature operation range, and r ntcl is the value of the ntc resistor at low temperature. MP2607 ? li-ion charger with power path management notice: the information in this document is subject to change wi thout notice. please contact m ps for current specifications. users should warrant and guarantee that third party intellectual property rights ar e not infringed upon when integrating mps products into any application. mps will not assume any legal responsibility for any said applications. MP2607 rev. 1.02 www.monolithicpower.com 15 6/19/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. package information qfn 14 (3mm x 4mm) side view top view 1 14 8 7 bottom view 2.90 3.10 1.60 1.80 3.90 4.10 3.20 3.40 0.50 bsc 0.18 0.30 0.80 1.00 0.00 0.05 0.20 ref pin 1 id marking 1.70 0.50 0.25 recommended land pattern 2.90 note: 1) all dimensions are in millimeters. 2) exposed paddle size does not include mold flash. 3) lead coplanarity shall be 0.10 millimeter max. 4) drawing conforms to jedec mo-229, variation veed-5. 5) drawing is not to scale. pin 1 id see detail a 3.30 0.70 pin 1 id option b r0.20 typ. pin 1 id option a 0.30x45 o typ. detail a 0.30 0.50 pin 1 id index area |
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