mp2603 single-cell 150ma linear li-ion battery charger mp2603 rev. 1.01 www.monolithicpower.com 1 1/31/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. the future of analog ic technology description the mp2603 is a low cost single cell li-ion battery charger ic suitable for low charge current applications. it features constant current (cc) and constant voltage (cv) charging modes with programmable charge current (50ma?150ma), trickle charge and charge status indication. the mp2603 is enabled with an input supply voltage greater than 3.5v. the charger ic is disabled when unplugged from the ac adaptor. to minimize the charger?s total solution cost, the mp2603 does not need an external reverse blocking diode, a precision current-sense resistor or a compensation capacitor at the output. mp2603 is available in a 5-pin tsot23 package. evaluation board reference board number dimensions ev2603ej-00b 1.4?x x 1.1?y x 0.5?z features ? v in surge up to 25v ? 0.75% v batt accuracy ? low battery reverse current, (< 1ua) ? programmable charge current ? over temperature protection ? over current protection ? charge status indication ? over charge protection ? no external sense resistor required ? no external reverse blocking diode required ? no output capacitor required for stability applications ? bluetooth headset ? mp3 players ? mini pdas ? cell phones ? digital cameras 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 of monolithic power systems, inc. typical application mp2603 batt gnd ipgm chgz 5 3 in 4 2 1 to system batt 4.5v - 5.5v v in r pgm
mp2603 ? single cell 150ma linear li-ion battery charger mp2603 rev. 1.01 www.monolithicpower.com 2 1/31/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. ordering information part number* package top marking MP2603EJ tsot23 m3 * for tape & reel, add suffix ?z (e.g. MP2603EJ?z). for rohs compliant packaging, add suffix ?lf (e.g. MP2603EJ?lf?z) package reference top view ipgm gnd chgz 1 2 3 5 4 batt in absolute maxi mum ratings (1) in to gnd .....................................-0.3v to +25v all other pins ..............................-0.3v to +6.5 v continuous power dissipation (t a = +25c) (2) ........................................................... 0.57w junction temperature ...............................140 c lead temperature ....................................260 c storage temperature............... -65c to +150 c recommended operating conditions (3) supply voltage v in ......................4.75v to 5.25v operating temperature.............. -20 c to +85 c thermal resistance (4) ja jc tsot23 .................................220 .... 110 .. 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 powe r 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-layer pcb.
mp2603 ? single cell 150ma linear li-ion battery charger mp2603 rev. 1.01 www.monolithicpower.com 3 1/31/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. electrical characteristics v in = 5v, t a = +25 c, unless otherwise noted. parameter symbol condition min typ max units supply current from v in i supply i chg = 0a 0.5 ma input under voltage lockout input falling 1.8 2.3 2.8 v battery reverse current to batt pin v batt = 4v, input = gnd or float 2 a battery voltage regulation v batt i chg = 5ma, 0c < t a < +50c 4.16 4.20 4.24 v v in = 5v, v batt = 3.8v, r pgm = 2.5k ? 135 150 165 ma v in = 5v, v batt = 3.8v, r pgm = 1.5k ? ? 7.2k ? , ?20c < t a < +85c 90 100 110 %i chg constant current regulation (5) i chg v in = 5v, v batt = 3.8v, 7.2k ? < r pgm 12.4k ? ?20c < t a < +85c 70 130 %i chg trickle charge current v in = 5v, v batt = 2.3v 5 10 15 %i chg trickle threshold voltage 2.45 2.60 2.75 v trickle voltage hysteresis 190 mv chgz low-to-high threshold 3 10 17 %i chg chgz sink current pin voltage = 0.2v 5 ma dropout voltage i chg = 150ma, v batt = 3.8v 640 mv thermal limit (6) 130 c overcharge protection v batt = 4.25v 0 a notes: 5) i chg is the target preprogrammed charge current (die temperature below 110c). 6) guaranteed by design.
mp2603 ? single cell 150ma linear li-ion battery charger mp2603 rev. 1.01 www.monolithicpower.com 4 1/31/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. pin functions pin # name description 1 ipgm charge current program pin. connect to a resistor to program the charge current. do not connect a capacitor to this pin. 2 gnd chip ground return. connect to the system ground. 3 chgz open-drain charge status indication pin. it can be connected through an led and a 430 ? resistor to batt for visual indication or through a 1k ? resistor to batt for use with a microcontroller. 4 in input supply pin. connect to a 5v (5%) pow er supply. the maximum surge voltage must be less than 25v. decouple this pin with a minimum of 0.1f ceramic capacitor. 5 batt charger output. connect to the battery. plac ing a capacitor to gnd on this pin is optional. block diagram battery charge control 2 ipgm in batt chgz gnd 1 4 5 3 r figure 1?functional block diagram
mp2603 ? single cell 150ma linear li-ion battery charger mp2603 rev. 1.01 www.monolithicpower.com 5 1/31/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. typical performanc e characteristics v in = 5v, c1 = 1f, c2 = 1f, t a = +25c, unless otherwise noted. charge current vs battery votlage 0.18 0.15 0.12 0.09 0.06 0.03 0.00 battery voltage (v) charge current (a) 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 0.18 0.16 0.14 0.12 0.10 0.08 0.06 0.04 0.02 0.00 battery voltage (v) battery current (a) 0 200 400 600 800 charge time (min) battery charge curve battery voltage vs input voltage battery voltage (v) 4.30 4.24 4.18 4.12 4.06 4.00 input voltage (v) 4.5 5.0 5.5 6.0 7.0 7.5 8.0 6.5 charge current vs battery voltage charge current (a) 0.20 0.18 0.16 0.14 0.12 0.10 battery voltage (v) 2.5 2.7 2.9 3.1 3.5 3.7 3.9 3.3 4.1 0.5 1.5 2.5 4.5 3.5 i chg = 45ma i chg = 0ma charge current vs input voltage charge current (a) 0.170 0.162 0.154 0.146 0.138 0.130 input voltage (v) 4.5 5.0 5.5 6.0 7.0 6.5 charge current vs r pgm resistance 10 9 8 7 6 5 4 3 2 1 0 charge current (ma) 40 60 80 100 140 160 120 v batt = 3.8v v batt = 3.4v i batt v batt v in = 8v v in = 5v
mp2603 ? single cell 150ma linear li-ion battery charger mp2603 rev. 1.01 www.monolithicpower.com 6 1/31/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. typical performanc e characteristics (continued) v in = 5v, c1 = 1f, c2 = 1f, t a = +25c, unless otherwise noted. reverse current vs battery votlage 0.80 0.75 0.70 0.65 0.60 0.55 0.50 0.45 0.40 battery voltage (v) 0.8 0.7 0.6 0.5 0.4 0.3 0.2 2.5 3 3.5 4.5 4 5.5 5 6 6.5 7 input voltage (v) forward leakage current charge current vs temperature charge current (a) 0.160 0.156 0.152 0.148 0.144 0.140 ambient temperature ( 0 c) -50 -25 0 25 75 50 -50 -25 0 25 75 50 battery voltage vs temperature battery voltage (v) 4.25 4.22 4.19 4.16 4.13 4.10 ambient temperature ( o c) 2.5 2.8 3.1 3.4 4.3 3.7 4 v in = 5v v batt 2v/div. v in 2v/div. i batt 0.1a/div. 2ms/div. power-on v batt 2v/div. v in 2v/div. i batt 0.1a/div. 10ms/div. power-off v in = 5v v in = 5v
mp2603 ? single cell 150ma linear li-ion battery charger mp2603 rev. 1.01 www.monolithicpower.com 7 1/31/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. operation the mp2603 is enabled with a minimum input supply voltage of 3.5v. this power supply must also be higher than both the uvlo threshold and the battery voltage. there is an internal 500k ? pull-down resistor connecting the in and gnd pins. the mp2603 provides cc/cv charge algorithms to automatically change modes depending on the battery status. figure 2 shows the typical charging procedure for the mp2603. trickle charging charge start charge end soft-start time thermal regulation cc mode cv mode 10% of i chg 90% of i chg i chg 2.6v 4.2v v batt v batt i batt i batt figure 2?mp2603 typical charging procedure the charge current, i chg , is programmed by connecting a resistor (r pgm ) from the i pgm pin to ground. the relationship of the charge current and the programming resistance is established by the following equation and graph. the table1 lists the typical application setting of ichg. pgm chg r k 53 . 2 ma 150 i = (1) table 1? r pgm and i chg relationship r pgm (k ? ) i chg (ma) 12.4 30 7.2 52 4.99 76 3.74 101 2.5 151 180 150 120 90 60 30 0 0.0 0.1 0.2 0.3 0.4 0.5 charge current vs 1/r pgm resistance charge current (ma) figure 3? charge current vs 1/r pgm resistance when battery voltage falls below the trickle threshold (2.6v), charge current is limited to 10% of the programmed value to trickle charge the fully depleted battery. after the battery voltage reaches 2.6v, the charger begins to charge at the constant current of the programmed value (i chg ). this 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. charge status (chgz) the open-drain chgz pin monitors charge status by connecting to v batt through an led and/or a resistor. the end-of-charge, or battery full, is indicated by the chgz pin changing from low to high (i.e. led turns off) when i chg decreases to 10% of the programmed value. thermal protection to prevent overheating, the mp2603 automatically limits the die temperature to 130c by reducing the internal current-setting reference voltage. in the thermal protection mode, the charge current reduces automatically, but remains continuous.
mp2603 ? single cell 150ma linear li-ion battery charger mp2603 rev. 1.01 www.monolithicpower.com 8 1/31/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. application flow chart of operation power-on reset (por) feature can be applied to the mp2603 to ensure that the device starts operating in a known state when power is applied. the flow chart in figure 4 describes the conditions and operation modes of the mp2603. cvc and ccc stand for ?constant voltage charge? and ?constant current charge?, respectively. figure 4?flow chart of operation
mp2603 ? single cell 150ma linear li-ion battery charger notice: the information in this document is subject to change wi thout notice. users should warra nt and guarantee that third party intellectual property rights are not infringed upon w hen integrating mps products into any application. mps will not assume any legal responsibility for any said applications. mp2603 rev. 1.01 www.monolithicpower.com 9 1/31/2013 mps proprietary information. p atent protected. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. package information tsot23-5
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