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mp2623 stand-alone, 2a, 1- or2-cell switching lifepo 4 battery charger mp2623 rev. 1.0 www.monolithicpower.com 1 12/26/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. the future of analog ic technology description the mp2623 is a monolithic, dc-dc, step- down, switching charger for a 1-or-2-cell serial lifepo 4 battery. it has an integrated high-side power mosfet that can output up to a 2a charge current. it also has peak-current?mode control for fast loop response and easy compensation. the mp2623 uses a sense resistor to control a programmable charge current, and accurately regulates the charge current and the charge voltage using two control loops. the mp2623 has multiple fault-condition protections that include cycle-by-cycle current limiting and thermal shutdown. other safety features include battery temperature monitoring and protection, charge status indication and a programmable timer to halt charging after a set time period. the mp2623 requires a minimal number of readily-available external components. the mp2623 is available in a 4mm4mm 16-pin qfn package. features ? charges 1- and 2-cell lifepo 4 battery packs ? wide operating-input range ? programmable charging current of up to 2a ? 0.75% v batt accuracy ? 0.2 ? integrated power mosfet ? up to 90% efficiency ? fixed 1.1mhz frequency ? preconditioning for fully-depleted batteries ? charging status indicator ? input supply fault indicator ? thermal shutdown ? cycle-by-cycle over-current protection ? battery temperature monitor and protection applications ? power tools and portable equipment ? handheld terminals ? lifepo 4 battery chargers all mps parts are lead-free and adhere to the rohs directive. for mps green status, please visit mps website under quality assurance. ?mps? and ?the future of analog ic technology? are registered trademarks of monolithi c power systems, inc. typical application l rs1 vin vref33 vcc cells chgok acok ntc en compv compi gnd tmr batt csp bst sw off on c2 22 c3 1 c4 2.2 nf c5 2. 2nf c6 0.1 c7 0.1 r1 r2 r3 10k 10 k r4 2.5k r5 750 4.7 100 m d1 c1 4.7 r ntc v in 1-2 cell lifepo 4 d2 5.5v to 24v mp2623 10 c in
mp2623 ? 2a, 24v input, 1.1mhz 1- or 2-cell switching lifepo 4 battery charger mp2623 rev. 1.0 www.monolithicpower.com 2 12/26/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. ordering information part number* package top marking mp2623gr qfn16 (44mm) mp2623 *for tape & reel, add suffix ?z (e.g. mp2623gr?z) package reference top view exposed pad on backside pin 1 id vcc ntc acok chgok gnd csp batt compi 1 2 3 4 13 14 15 16 8 7 6 5 compv cells en vref33 tmr bst sw vin 12 11 10 9 absolute maxi mum ratings (1) supply voltage vcc, vin ............................ 26v v sw ..................................... -0.3v to (v in + 0.3v) v bst ...................................................... v sw + 6v v csp , v batt, ...................................-0.3v to +18v v acok , v chgok, ..............................-0.3v to +26v all other pins ..................................-0.3v to +6v continuous power dissipation (t a = 25c) (2) ............................................................. 2.7w junction temperature ...............................150c lead temperature ....................................260c storage temperature............... -65c to +150c recommended operating conditions (3) supply voltage v in ..............................5v to 24v operating junction temp. (t j ) -40c to +125c thermal resistance (4) ja jc qfn16 (4x4mm) ..................... 46 ...... 10... 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 cont inuous 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 circui try 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 board.
mp2623 ? 2a, 24v input, 1.1mhz 1- or 2-cell switching lifepo 4 battery charger mp2623 rev. 1.0 www.monolithicpower.com 3 12/26/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. electrical characteristics v in = 19v, t a = 25c, cells=0v, unless otherwise noted. parameters symbol condition min typ max units cells=0v 3.573 3.6 3.627 battery-terminal voltage v batt cells=float 7.146 7.2 7.254 v csp batt current i csp ,i batt charging disabled 1 a switch-on resistance r ds(on) 0.2 ? switch leakage en = 4v, v sw = 0v 0 1 a cc (5) 4.1 a peak-current limit trickle 2 a cc current i cc rs1=100m ? 1.8 2.0 2.2 a trickle-charge current i trickle 10% i cc trickle-charge voltage threshold v tc 2.52 v/cell trickle-charge hysteresis 300 mv/cell termination current threshold i bf 5% 10% 15% i cc oscillator frequency f sw cells=0v, v batt =3.2v 1100 khz fold-back frequency v batt =0v 350 khz maximum duty cycle 90 % maximum current-sense voltage (csp to batt) v sense 170 200 230 mv minimum on time (5) t on 100 ns under-voltage lockout threshold, rising v in 3.1 3.3 3.5 v under-voltage lockout threshold, hysteresis 300 1000 mv open-drain sink current v drain =0.3v 5 ma dead battery indicator in trickle mode c tmr =0.1 f 30 min recharge threshold for v batt v rechg 3.42 v/cell recharge hysteresis 100 mv ntc low-temp rising threshold r ntc =ncp18x103, 0c 70.5 73.5 76.5 %of vref33 ntc high-temp falling threshold r ntc =ncp18x103, 50c 27.5 29.5 31.5 %of vref33 vin min. head-room (reverse blocking) v in ? v batt 180 mv
mp2623 ? 2a, 24v input, 1.1mhz 1- or 2-cell switching lifepo 4 battery charger mp2623 rev. 1.0 www.monolithicpower.com 4 12/26/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. electrical characteristics ( continued ) v in = 19v, t a = 25c, cells=0v, unless otherwise noted. parameters symbol condition min typ max units en input low voltage 0.4 v en input high voltage 1.8 v en =4v 4 en input current en =0v 0.2 a en =4v 0.5 ma supply current (shutdown) en =4v, consider vref33 pin output current, r 3 =10k,r ntc =10k 0.665 ma supply current (quiescent) en =0v, cells=0v 2.0 ma thermal shutdown (5) 150 c vref33 output voltage 3.3 v vref33 load regulation i load =0 to 10ma 30 mv notes: 5) guaranteed by design.
mp2623 ? 2a, 24v input, 1.1mhz 1- or 2-cell switching lifepo 4 battery charger mp2623 rev. 1.0 www.monolithicpower.com 5 12/26/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. pin functions pin # name description 1 vcc ic supply voltage. 2 ntc thermistor input. connect a resistor from this pin to vref33, and the thermistor from this pin to ground. 3 acok valid input supply indicator. open drain outpu t. add a pull-up resistor. logic low indicates the presence of a valid input supply. 4 chgok charging status indicator. open drain outpu t. add a pull-up resistor. logic low indicates normal charging. logic high indicates either a completed charge process or a fault- suspended process. 5 vref33 internal linear regulator, 3.3v reference output. bypass to gnd with a 1 f ceramic capacitor. 6 en on/off control input. 7 cells command input. indicates the number of lifepo 4 battery cells. connect to vref33 or float for 2-cell operation. ground for 1-cell operation. 8 compv v-loop compensation. decouple this pin with a capacitor and a resistor. 9 compi i-loop compensation. decouple this pin with a capacitor and a resistor. 10 batt positive battery terminal. 11 csp battery-charge current-sense?p ositive input. connect a resistor rs1 between csp and batt. the full charge current is: ?? ?? m ? rs1 200mv a i chg ? . 12 gnd ground. voltage reference for the regulated output voltage. place this node outside of the path of the switching diode (d2) to the input gr ound to prevent switching current spikes from inducing voltage noise. 13 tmr set-safe?time period. a 0.1a current charges and discharges the external capacitor decoupled to gnd. the capacitor value programs the time period. 14 bst bootstrap. requires a charged capacitor to driv e the power switch?s gate above the supply voltage. connect a capacitor between sw and bst pi ns to form a floating supply across the power switch driver. 15 sw switch output. 16 vin regulator input voltage. the mp2623 regulates a 5v-to-24v input to a voltage suitable for charging either a 1- or 2-cell lifepo 4 battery. requires capacitors to prevent large voltage spikes from appearing at the input.
mp2623 ? 2a, 24v input, 1.1mhz 1- or 2-cell switching lifepo 4 battery charger mp2623 rev. 1.0 www.monolithicpower.com 6 12/26/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. typical performanc e characteristics v in =5v/ 9v, c1=4.7 f, c2=22 f, l=4.7 h, rs1=100m ? , real/simulation battery load, t a =25c, unless otherwise noted. times(min) battery voltage(v) charge current(a) 2 cells charge current vs. battery voltage battery simulator battery voltage(v) charge current(a) times(min) battery voltage(v) battery voltage(v) charge current(a) ntc control window 0 0.5 1 1.5 2 2.5 3 8 1216202428 v ntc (v) low temp on high temp on high temp off low temp off breakdown voltage input current (ma) input voltage (v) 0 2 4 6 8 10 12 14 16 0 10203040 efficiency (%) efficiency vs. battery voltage 1 cell, i chg =2a efficiency vs. i chg 1 cell, v batt =3.6v efficiency vs. v in 1 cell, v batt =3.4v, i chg =2a efficiency (%) efficiency (%) 0 0.4 0.8 1.2 1.6 2 2.4 01234 v in =24v 6.5 6.6 6.7 6.8 6.9 7 7.1 7.2 7.3 0 5 10 15 20 25 0 0.4 0.8 1.2 1.6 2 2.4 012345678 0 10 20 30 40 50 60 70 80 90 2.5 2.7 2.9 3.1 3.3 3.5 3.7 v in =5v v in =9v v in =19v 10 20 30 40 50 60 70 80 90 100 0 500 1000 1500 2000 2500 charge current(a) v in =5 v in =9v v in =19v v in =24v 0 10 20 30 40 50 60 70 80 90 0 5 10 15 20 25 v in =9v v in =24 v in =5v 1 cell battery charge curve 1 cell charge current vs. battery voltage battery simulator 2 cells battery charge curve 3.27 3.32 3.37 3.42 3.47 3.52 3.57 3.62 010 20 30 40 50 60 0 0.5 1 1.5 2 2.5 i chg v batt 0 0.5 1 1.5 2 2.5 i chg v batt charge current(a) input voltage (v) v in =24v battery voltage(v) input voltage (v)
mp2623 ? 2a, 24v input, 1.1mhz 1- or 2-cell switching lifepo 4 battery charger mp2623 rev. 1.0 www.monolithicpower.com 7 12/26/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. typical performanc e characteristics ( continued ) v in =5v/ 9v, c1=4.7 f, c2=22 f, l=4.7 h, rs1=100m ? , real/simulation battery load, t a =25c, unless otherwise noted. temperature ( o c) temperature ( o c) temperature ( o c) temperature ( o c) 1 cell batt float voltage vs. v in 1 cell batt charge full voltage vs. temperature 2 cells batt charge full voltage vs. temperature rds_on vs. temperature 3.0 3.1 3.2 3.3 3.4 3.5 -40-20 020406080 constant current charge vs. temperature vref33 vs. temperature v in =19v v in =19v v in =19v 450 460 470 480 490 500 -40 -20 0 20 40 60 80 charge current (ma) vref33 (v) 1 cell i chg =500ma 3.45 3.5 3.55 3.6 3.65 10 15 20 25 30 charge full voltage(v) 3.45 3.5 3.55 3.6 3.65 -40-20 0 20406080 battery voltage(v) 6.8 6.9 7 7.1 7.2 7.3 -40 -20 0 20 40 60 80 battery voltage(v) 0.1 0.15 0.2 0.25 0.3 0.35 -40 -20 0 20 40 60 80 temperature( o c) input voltage(v) 05
mp2623 ? 2a, 24v input, 1.1mhz 1- or 2-cell switching lifepo 4 battery charger mp2623 rev. 1.0 www.monolithicpower.com 8 12/26/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. typical performanc e characteristics ( continued ) v in =5v/ 9v, c1=4.7 f, c2=22 f, l=4.7 h, rs1=100m ? , real/simulation battery load, t a =25c, unless otherwise noted. v in 2v/div. v batt 1v/div. v sw 2v/div. i chg 1a/div. i chg 1a/div. v in 2v/div. v batt 2v/div. v sw 2v/div. i chg 2a/div. v in 2v/div. v batt 1v/div. v sw 2v/div. i chg 1a/div. v en 5v/div. v batt 2v/div. v sw 5v/div. i chg 2a/div. v en 5v/div. v batt 2v/div. v sw 5v/div. i chg 2a/div. v sw 2v/div. i chg 1a/div. v in 2v/div. v batt 2v/div. v sw 2v/div. i chg 1a/div. 400ns/div. v in 2v/div. v batt 2v/div. v sw 2v/div. i chg 1a/div. steady state waveform 1 cell, v batt =2v steady state waveform 1 cell, v batt =3.2v steady state waveform 1 cell, v batt =3.6v power on waveform 1 cell, i chg =2a,v batt =3v power off waveform 1 cell, i chg =2a,v batt =3v en on waveform 1 cell, i chg =2a,v batt =3v en off waveform 1 cell, i chg =2a,v batt =3v v ntc 5v/div. v batt 2v/div. v batt 1v/div. v sw 2v/div. v tmr 500mv/div. 200ms/div. ntc control , 1 cell, i chg =2a, v batt =2.5v, battery simulator timer out 1 cell,i chg =2a, v batt =3.5v, c timer =47pf, battery simulator 400ns/div. 4ms/div. 100ms/div.
mp2623 ? 2a, 24v input, 1.1mhz 1- or 2-cell switching lifepo 4 battery charger mp2623 rev. 1.0 www.monolithicpower.com 9 12/26/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. functional block diagram charge control logic timer pre_regs 1100khz osc vref ldo regulator drive a1 current sense ctrl charge current sense pwm comparator current limit comparator s r r q bst sw csp a2 batt 0.12v or 1.2v gmi gmv 3 bit trim 5 bit trim en vref33 ntc cells fb vbatt ctrl tmr 0.12v acok chgok fb fb gnd vcc compi compv max trickle time max charge time max reflesh time acok 1.2v 1.11v 0.83v vin batt+300mv tc/cc charge comparator recharge comparator bf comparator m1 comp x6 charge current sense iref rs1 l 1- or 2- cell lifepo 4 battery cells mini refresh vin d2 figure 1: functional block diagram
mp2623 ? 2a, 24v input, 1.1mhz 1- or 2-cell switching lifepo 4 battery charger mp2623 rev. 1.0 www.monolithicpower.com 10 12/26/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. operation the mp2623 is a peak-current?mode controlled switching charger for use with lifepo 4 batteries. at the beginning of each cycle, m1 is off and the comp voltage exceeds the output of the current- sense amplifier (a1). the pwm comparator?s output is low, and the rising edge of the 1.1mhz clk signal sets the rs flip-flop that turns on m1; this connects the sw pin and the inductor to the input supply. a1 senses and amplifies the inductor current: the pwm comparator then compares the sum of this signal and the ramp compensator signal against the comp signal. when the sum of the a1 output and the ramp compensator exceeds the comp voltage, the rs flip-flop resets and turns m1 off. the external switching diode (d2) then conducts the inductor current. if the sum of the a1 output and the ramp compensator does not exceed the comp voltage, then the falling edge of the clk resets the flip-flop. the mp2623 uses comp to select the smaller value of gmi and gmv to implement either current-loop control or voltage-loop control. current-loop control triggers when the battery voltage goes low, which results in the gmv output saturating. the gmi compares the charge current (as a voltage sensed through rs1) against the reference voltage to regulate the charge current to a constant value. when the battery voltage charges up to the reference voltage, the output of gmv goes low and initiates voltage loop control to control the duty cycle to regulate the output voltage. the mp2623 has an internal linear regulator? vref33?to power internal circuitry. it can also power external circuitry as long as the load does not exceed the maximum current (30ma). connect a 1 f bypass capacitor from vref33 to gnd to ensure stability. charge cycle (mode change: trickle ? cc ? cv) at the start of a charging cycle, the mp2623 monitors v batt . if v batt is lower than the trickle- charge threshold, v tc (typically 2.52v/cell), the charging cycle will start in trickle-charge mode (10% of the rs1-programmed constant-charge current, i cc ) until the battery voltage reaches v tc . if the charge stays in the trickle-charge mode until the time-out condition triggers, charging terminates and will not resume until either the input power or the en signal refreshes. otherwise, gmi regulates the charge current to the level set by rs1. the charger operates in constant-current?charging mode. the compi voltage?regulated by gmi?determines the switching duty cycle. when the battery voltage triggers constant- voltage mode, gmv regulates the comp pin and the duty cycle. when the charge current drops to the battery-full threshold, i bf (typically 10% i cc ), the battery is defined as fully-charged, the charger stops charging, and chgok goes high to indicate the charge-full condition. if the total charge time exceeds the timer period, charging terminates at once and will resume when either the input power or en signal can restart the charger. figure 2 shows the typical charge profile of the mp2623. trickle charge cc charge threshold cv charge threshold cc charge cv charge i chg v batt charge full trickle charge current constant charge current i bf figure 2: li-ion battery charging profile automatic recharge after the battery completely recharges, the charger removes all the blocks besides the battery voltage monitor to reduce the leakage current from the input or the battery. if the battery voltage drops below 3.42v/cell, the circuit will automatically recharge the battery using soft-start. the timer will then restart to avoid triggering a false fault.
mp2623 ? 2a, 24v input, 1.1mhz 1- or 2-cell switching lifepo 4 battery charger mp2623 rev. 1.0 www.monolithicpower.com 11 12/26/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. charger status indication mp2623 has two open-drain status outputs: acok and chgok . the acok pin goes low when the ic supply voltage (vcc) exceeds the under-voltage lockout threshold and the regulated voltage vin is 300mv higher than v batt to make sure the regulator can operate normally. chgok indicates charge status. table 1 describes acok and chgok outputs under different charge conditions. table 1 D charging status indication acok chgok charger status low low in charging low high end of charge, ntc fault, timer out, thermal shutdown, en disable high high v in ?v batt <0.3v. v cc mp2623 ? 2a, 24v input, 1.1mhz 1- or 2-cell switching lifepo 4 battery charger mp2623 rev. 1.0 www.monolithicpower.com 12 12/26/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. l rs1 vin vref33 vcc cells chgok acok ntc en compv compi gnd tmr batt csp bst sw off on c2 22 c3 1 c4 2.2 nf c5 2. 2nf c6 0.1 c7 0.1 r1 r2 r3 10k 10 k r4 2.5k r r6 5750 4.7 100 5v to 24v m m1 c1 4. 7 r ntc v in 1- or 2- cell lifepo 4 b attery d2 mp2623 c8 m2 22 v sys figure 3: mp2623 with power selector
mp2623 ? 2a, 24v input, 1.1mhz 1- or 2-cell switching lifepo 4 battery charger mp2623 rev. 1.0 www.monolithicpower.com 13 12/26/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. operation flow chart figure 4: normal charging operation flow chart
mp2623 ? 2a, 24v input, 1.1mhz 1- or 2-cell switching lifepo 4 battery charger mp2623 rev. 1.0 www.monolithicpower.com 14 12/26/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. operation flow chart (continued) figure 5: fault-protection flow chart
mp2623 ? 2a, 24v input, 1.1mhz 1- or 2-cell switching lifepo 4 battery charger mp2623 rev. 1.0 www.monolithicpower.com 15 12/26/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. application information setting the charge current rs1 sets the mp2623 charge current (see typical application). determine the current with the following equation: ?? ?? m ? rs1 200mv a i chg ? (1) selecting the inductor use a 1h-to-10h inductor for most applications. calculate the inductance value from the following equation. out in out in l osc v(vv) l vif ?? ? ?? ? (2) where i l is the inductor ripple current. choose i l to be approximately 30% of the maximum charge current, 2a. v out is the 1- or 2-cell battery voltage. the maximum inductor peak current is: ? ?? l l(max) chg i ii 2 (3) under light-load conditions (below 100ma), use a larger inductor value to improve efficiency. select an inductor with a dc resistance of less than 200m ? to optimize efficiency. ntc function figure 6 shows that the low temperature threshold and high-temperature threshold are preset internally to 73.5%vref33 and 29.5%vref33, respectively, using a resistor divider. for a given ntc thermistor, we can select appropriate r3 and r6 resistors to set the ntc window. for the thermistor (ncp18xh103) noted in the electrical characteristic previous, at 0c, r ntc_cold = 27.445k; at 50c, r ntc_hot = 4.1601k. assuming that the ntc window is between 0c and 50c, we can derive the following equations: ntc _ cold th _ low ntc _ cold r6 //r v 73.5% r3 r6 // r vref33 ?? ? (4) th _ high ntc _ hot ntc _ hot v r6 // r 29.5% r3 r6 // r vref33 ?? ? (5) according to equation (4) and equation (5), r3 = 9.63k and r6 = 505k. simplifying, select r3=10k and r6 no connect to approximate the estimate. ntc vref33 low temp threshold high temp threshold r ntc r3 r6 v th_low v th_high figure 6: ntc function block selecting the input capacitor the input capacitor reduces the surge current drawn from the input and the switching noise from the device. chose an input capacitor with an impedance at the switching frequency less than the input source impedance to prevent a high- frequency switching current. use ceramic capacitors with x5r or x7r dielectrics with low esr and small temperature coefficients. a 4.7f capacitor is sufficient for most applications. selecting the output capacitor the output capacitor limits output voltage ripple and ensures regulator-loop stability. the output capacitor impedance should be low at the switching frequency. use ceramic capacitors with x5r or x7r dielectrics. pc board layout connect the high frequency and high current paths (gnd, in, and sw) to the device with short, wide, and direct traces. place the input capacitor as close as possible to the in and gnd pins. place the external feedback resistors next to the fb pin. keep the switching node sw short and away from the feedback network.
mp2623 ? 2a, 24v input, 1.1mhz 1- or 2-cell switching lifepo 4 battery charger notice: the information in this document is subject to change wi thout notice. please contact m ps for current specifications. users should warrant and guaran tee that third party intellectual property right s are not infringed upon when integrating mps products into any application. mps will not assume any legal responsibility for any said applications. mp2623 rev. 1.0 www.monolithicpower.com 16 12/26/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. package information qfn16 (4 x 4mm) side view top view 1 16 13 12 9 85 4 bottom view 3.90 4.10 2.15 2.45 3.90 4.10 2.15 2.45 0.65 bsc 0.25 0.35 0.80 1.00 0.00 0.05 0.20 ref pin 1 id marking 2.30 0.65 0.35 recommended land pattern 3.80 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) jedec reference is mo-220, variation vggc. 5) drawing is not to scale . pin 1 id see detail a pin 1 id option a 0.45x45 o typ. pin 1 id option b r0.25 typ. detail a pin 1 id index area 1.00 0.50 0.70

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