UP6008 1 UP6008-ds-c3001, dec. 2014 www.upi-semi.com conceptual ? ? ? ? ? drive up to seven white leds from 3v supply ? ? ? ? ? wide vin range from 2.5v to 6v ? ? ? ? ? internal soft-start ? ? ? ? ? one pin shutdown and dimming control ? ? ? ? ? wide range for pwm dimming (100hz to200khz) ? ? ? ? ? under voltage protection ? ? ? ? ? over-temperature and over-voltage protection ? ? ? ? ? integrated 2a, 0.2 ?? ?? ? switch ? ? ? ? ? internal compensation ? ? ? ? ? small sot23-6l package ? ? ? ? ? rohs compliant and halogen free rebmunredr oe pytegakca pk ramer 6amp8006pu l6-32tos 6amq8006pu tiny package, high performance, constant current switching regulator for white led ? ? ? ? ? white led supply for backlight displays ? ? ? ? ? cellular phones ? ? ? ? ? pdss, handheld computers ? ? ? ? ? digital cameras ? ? ? ? ? mp3 players ? ? ? ? ? gps receivers ? ? ? ? ? camcorders general description applications ordering information features the UP6008 is a compact high-efficiency step-up converter with integrated switch specifically designed to drive up to seven white leds in series. series connection of the leds provides identical current resulting in uniform brightness. fixed 1.0 mhz operation allows smallest output ripple and external component size. with high conversion efficiency and small package, the UP6008 is suitable for portable devices which pcb area is especially concerned. the UP6008 features over-voltage protection against open- led situation. a single pin provides shutdown and accurate led dimming control. other features includes internal soft start, internal compensation, over-current protection, and over temperature protection. the UP6008 is available in sot23 - 6l package. l 22uh c out 1uf c in 2.2uf r fb lx gnd en vout fb vin chip enable vin 7 wleds pin configuration & typical application circuit note: (1) please check the sample/production availability with upi representatives. (2) upi products are compatible with the current ipc/jedec j-std-020 requirements. they are halogen-free, rohs compliant and 100% matte tin (sn) plating that are suit- able for use in snpb or pb-free soldering processes. sot23-6l gnd en vin fb lx vou t 1 2 4 6 3 5 upi confidential
UP6008 2 UP6008-ds-c3001, dec. 2014 www.upi-semi.com conceptual .onni pe manni pn oitcnufnip 1x l .tuptuohctiwslanretni ehtotnipsihttcennoc.tefsomnlanretnifoniardehtsinipeht .edoidykttohcslanretxefoedonadnarotcudnitsoob 2d ng .dnuorg cfolanimretedohtacehtotyltceridnipehtseit in cdna tuo h tiwenalpdnuorgdna . nipsihtottcennocdluohsstnenopmockcabdeefdnalangis-llamslla.ecnadepmitsewoleht 3b f .kcabdeeftnerruc s itnerrucdeleht.reifilpmarorrefotupni-gnitrevniehtsinipsiht .egatlovecnereferlanretniotdetalugerdnarotsiserseiresahguorhtdesnes 4n e .lortnocgnimmiddnanwodtuhs n ipsiht.retrevnocehtnwodstuhswolnipsihtgnillup ).noitcesdetalerehtees(lortnocgnimmiddelrofsesulpseviecer 5t uov .egatlovtuptuo t uptuorofderotinomsinipsiht.egatlovtuptuoehtotyltceridnipsihttcennoc s iroticapaccimarecr7xror5xfu1muminima.del-nepotsniaganoitcetorpegatlovrevo .deriuqer 6n iv .tupniylppusrewop ehtsrewopdnaegatlovtuptuoehtottnerrucseilppustahtegatlovtupni c imarecr7xror5xfu2.2muminimahtiwegatlovtupnissapyb.tiucriclortnoclanretni .roticapac functional pin description functional block diagram control logic driver current sense current limit detector overvoltage protection slope comp shutdown & dimming control v ref bandgap and bias en gnd vout vin lx error amp. pwm comp. fb upi confidential
UP6008 3 UP6008-ds-c3001, dec. 2014 www.upi-semi.com conceptual functional description the UP6008 is a compact high-efficiency step-up converter with integrated switch specifically designed to drive up to 7 wleds in series. series connection of the leds provides identical led current resulting in uniform brightness. fixed 1.0mhz operation allows smallest output ripple and external component size. with high conversion efficiency and small package, the UP6008 is suitable for portable devices where pcb area is especially concerned. power on reset the UP6008 continuously monitor supply input voltage at vin pin for power on reset (por). once the rising por threshold is exceeded, the UP6008 sets itself to active state and is ready to accept chip enable command. the por threshold is typically 2.2v at v in rising with 0.1v hysteresis. enable/disable pulling the en pin higher than 1.4v enables the device and initiate its soft start cycle. pulling the en pin lower than 0.4v disables the device and reduces it shutdown current less than 1ua typically. when the en pin pulls low, the UP6008 does not shuts down immediately but reduces the led current gradually. soft start the UP6008 limits the in-rush current at start-up by increasing the current limit. this prevents unwanted shutdown otherwise may be triggered by voltage drop due to large inrush current. led current regulation the UP6008 operates in a constant-frequency, slope- compensated peak-current-mode control to regulate the led current. the led current is sensed at fb pin by a current sensing resistor (r fb ): v fb = r fb x i led . the error amplifier compares the feedback voltage with internal 0.3v reference and compensates the error signal to get current command level. the internal nmosfet turns on at the beginning of each switching cycle and lets the inductor current ramp up linearly. the nmosfet turns off when the inductor current reaches the current command level. the UP6008 modulates on-time of nmosfet by changing the current command to regulate the led current. dimming control the UP6008 receives a pwm signal at en pin for led brightness control. the pwm signal is flatted by internal low pass filter to get a reference voltage that is proportional to the duty cycle of the pwm signal. the UP6008 does not turn off as the en pin is pulled high or low as shown in the typical operation characteristics section. this eliminates inrush current and audio noise that may occurs in convention pwm dimming control. the pwm frequency range from 100hz to 200khz is acceptable and yield linear brightness control. current limit function the UP6008 features cycle-by-cycle current to prevent the device from damage due over current that might be result from of abnormal operation. the UP6008 turns off the nmosfet when its current exceeds the current limit of 2a minimum, preventing the indcutor current from continuously ramping up. the nmosft is turned on at next switching cycle. this minimizes the power dissipation and components stresses under over load and short-circuits conditions. over voltage protection the over voltage protection prevents damage to UP6008 during high output voltage conditions. when the output voltage is higher than threshold limit, the converter stops switching and the output voltage decays. switching would be turned on again when the voltage of the ovp pin drops below the below the lower hysteresis limit. over temperature protection the excessive internal dissipation of thermal protection will malfunction UP6008. the junction over-temperature threshold is 160 o c with 30 o c of temperature hysteresis. the output voltage resumes when the over temperature fault condition is removed. upi confidential
UP6008 4 UP6008-ds-c3001, dec. 2014 www.upi-semi.com conceptual note 1. stresses listed as the above absolute maximum ratings may cause permanent damage to the device. these are for stress ratings. functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. exposure to absolute maximum rating conditions for extended periods may remain possibility to affect device reliability. note 2. devices are esd sensitive. handling precaution recommended. note 3. ja is measured in the natural convection at t a = 25 o c on a low effective thermal conductivity test board of jedec 51-3 thermal measurement standard. note 4. the device is not guaranteed to function outside its operating conditions. (note 1) supply input voltage, v in ---------------------------------------------------------------------------------------------------------------- -0.3v to +6.5 v lx, vout pin voltage -------------------------------------------------------------------------------------------------------------------- -0.3v to +30v other pins --------------------------------------------------------------------------------------------------------------------------------- -0.3v to +6v storage temperature range ----------------------------------------------------------------------------------------------------------- -65 o c to +150 o c junction temperature ------------------------------------------------------------------------------------------------------------------------------- ----- 150 o c lead temperature (soldering, 10 sec) ------------------------------------------------------------------------------------------------------------ 260 o c esd rating (note 2) hbm (human body mode) --------------------------------------------------------------------------------------------------------------------- 2kv mm (machine mode) ----------------------------------------------------------------------------------------------------------------------------- 200v (note 4) operating junction temperature range ------------------------------------------------------------------------------------------- -40 o c to +125 o c operating ambient temperature range ------------------------------------------------------------------------------------------- -40 o c to +85 o c supply input voltage, v in --------------------------------------------------------------------------------------------------------------- +2.8v to +5. 5v absolute maximum rating thermal information recommended operation conditions package thermal resistance (note 3) sot23 - 6l ja ------------------------------------------------------------------------------------------------------------------------ 250 o c/w sot23 - 6l jc ------------------------------------------------------------------------------------------------------------------------ 100 o c/w power dissipation, p d @ t a = 25 o c sot23 - 6l ---------------------------------------------------------------------------------------------------------------------------------------- 0.4w upi confidential
UP6008 5 UP6008-ds-c3001, dec. 2014 www.upi-semi.com conceptual electrical characteristics (v in = 3.7v, c in = 2.2uf, c out = 1uf, i out = 20ma, l = 22uh, t a =25 o c, unless otherwise specified) electrical characteristics retemara pl obmy ss noitidnoctse tn i mp y tx am s tinu tnerrucylppus egnaregatlovylppu sv ni 5. 2- -0 . 6v dlohserhttesernorewo pv ni v ni gnisi r0 . 22 . 25 4. 2v siseretsyhtesernorewop ? v ni - -1 . 0- -v tnerructnecseiu qi q v ne v,v5= bf i,v5.1= tuo ,am0= )gnihctiwson( - -0 0 20 0 3a u tnerrucylppu si ni gnihctiws,v0=b f- -12a m tnerrucnwodtuh si ndhs v ne v0 =- -14a u ecnerefer egatlovecnerefe rv bf p8006p u6 91. 02 . 04 02.0 v q8006p u4 92. 03 . 06 03.0 noitalugereni lv ni v3.4~v0.3 =- -1- -% ycaruccalortnocgnimmid zhk02ta%02>elcycytudmw p- -5- -% ytudgnimmidmuminim 5- -0 0 1% rotallicso egnarycneuqerfgnihctiw sf cso 57. 015 2. 1z hm elcycytudmumixam 0 92 9- -% dnahctiwsrewo pe doid r )no(sd hctiw sr )no(sd i xl am001 =- -2 . 0- - ? tupnicigol dlohserhtwolcigoln ev li v ni nwodtuhs,v6otv8.2 =- -- -4 . 0v dlohserhthgihcigoln ev hi v ni elbane,v6otv8.2 =4 . 1- -- -v tnerrucknisn ei hi - -1- -a u gnimmidrofycneuqerfmwp 1. 0- -0 0 2z hk yalednowdtuhs - -0 2- -s m noitcetorp levelnoitcetorpegatlovrevo 5 2729 2v leveltimiltnerru ci xl 2- -- -a erutarepmetnowdtuhslamreh tt ndhs ngisedy b- -0 6 1- - o c siseretsyhnwodtuhslamreht ? t ndhs ngisedy b- -0 3- - o c upi confidential
UP6008 6 UP6008-ds-c3001, dec. 2014 www.upi-semi.com conceptual v out (50mv/div) i out (10ma/div) v out (50mv/div) i out (10ma/div) i lx (100ma/div) v en (2v/div) v out (10v/div) i lx (100ma/div) v en (2v/div) v out (10v/div) v en (2v/div) i out (10ma/div) v en (2v/div) i out (10ma/div) typical operation characteristics ripple 500ns/div v in = 3.7v, i out = 20ma, c out = 0.22uf ripple 500ns/div v in = 3.7v, i out = 20ma, c out = 1uf pwm dimming from en 10us/div v in = 3.7v, i out = 20ma, f dim = 20khz pwm dimming from en 1ms/div v in = 3.7v, i out = 20ma, f dim = 200hz power off from en 100ms/div v in = 3.7v, i out = 20ma power on from en 2ms/div v in = 3.7v, i out = 20ma upi confidential
UP6008 7 UP6008-ds-c3001, dec. 2014 www.upi-semi.com conceptual 0.5 1 1.5 2 2.5 3 3.5 2.5 3 3.5 4 4.5 5 5.5 6 180 190 200 210 220 230 240 2.533.544.555.56 700 800 900 1000 1100 1200 1300 1400 -40 -20 0 20 40 60 80 100 120 140 190 195 200 205 210 -40 -20 0 20 40 60 80 100 120 140 0 5 10 15 20 25 0 102030405060708090100 100khz 200khz 20khz 10khz 1khz 100hz 40% 45% 50% 55% 60% 65% 70% 75% 80% 85% 90% 3.0 3.5 4.0 4.5 5.0 5.5 6.0 load = 10ma load = 20ma switching frequency vs. temperature temperature ( o c) v in = 3.7v, no load switching frequency (khz) typical operation characteristics quiescent current (ua) input voltage (v) v en = 3.7v, v fb = 1.5v, no switching quiescent current vs. input voltage supply current vs. input voltage supply current (ma) input voltage (v) v en = 3.7v, v fb = 0v, switching reference voltage vs. temperature temperature ( o c) v in = 3.7v, no load reference voltage (mv) led current vs. duty duty (%) v in = 3.7v, 7wled, i out = 20ma led current (ma) efficiency vs. input voltage input vltage (v) 7wled, l = 22uh efficiency (%) upi confidential
UP6008 8 UP6008-ds-c3001, dec. 2014 www.upi-semi.com conceptual application information component selection external component selection begins with inductor value selection based on the considerations of the output voltage, output current, and the maximum/minimum input voltages. catch diode and input/output capacitors can be selected according to the inductor value l. inductor selection inductor selection should consider the inductor value, rated current, dcr, size, core material, and cost. the inductor value is selected based on the consideration of inductor ripple current. the recommended value of inductor for 10 wleds applications is from 10uh to 22uh. the inductor should have low core loss at 1mhz and low dcr for better efficiency. the inductor saturation current rating should be considered to cover the inductor peak current. maximum output current vs. output voltage 200 250 300 350 400 450 500 550 600 650 700 750 800 850 900 10 12 14 16 18 20 22 24 v in = 3.3v v in = 3.7v v in = 4.2v v in = 5v figure 2. maximum output current vs. output voltage () () ? ? ? ? ? ? ? ? ??= d lf v id i osc in lx max out 2 1 1 calculation conditions: l = 10uh, f osc = 1mhz, = 0.85, i lx = 2a multi-strings application lx gnd en vout fb vin nxm wleds l 22uh c out 1uf c in 2.2uf vin r fb chip enable figure 3. application for driving n x m wleds please consider the maximum output current vs. output voltage relationship when used for n x m wleds application. layout consideration for best performance of the UP6008, the following guidelines must be strictly followed. ? ? ? ? ? input and output capacitors should be placed close to the ic and connected to ground plane to reduce noise coupling. ? ? ? ? ? the gnd should be connected to a strong ground plane for heat sinking and noise protection. ? ? ? ? ? keep the main current traces as short and wide as possible. ? ? ? ? ? lx node of dc-dc converter is with high frequency voltage swing. it should be kept at a small area. ? ? ? ? ? place the feedback components as close as possible to the ic and keep away from the noisy devices. via for gn d via for gnd c in r set inductor c out gnd en vin fb lx 1 2 4 6 3 vout 5 figure 1. sot23 - 6l layout reference upi confidential
UP6008 9 UP6008-ds-c3001, dec. 2014 www.upi-semi.com conceptual package information note 1.package outline unit description: bsc: basic. represents theoretical exact dimension or dimension target min: minimum dimension specified. max: maximum dimension specified. ref: reference. represents dimension for reference use only. this value is not a device specification. typ. typical. provided as a general value. this value is not a device specification. 2.dimensions in millimeters. 3.drawing not to scale. 4.these dimensions do not include mold flash or protrusions. mold flash or protrusions shall not exceed 0.15mm. sot23 - 6l 0.30 - 0.50 2.80 - 3.00 2.60 - 3.00 1.90 bsc 0.00 - 0.15 0.95 bsc 1.50 - 1.70 0.08 - 0.22 0.30 - 0.60 1.45 m a x upi confidential
UP6008 10 UP6008-ds-c3001, dec. 2014 www.upi-semi.com conceptual important notice upi and its subsidiaries reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. upi products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgment. however, no res ponsibility is assumed by upi or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. no license is granted by implication or otherwise under any patent or patent rights of upi or its subsidiaries. copyright ( c ) 2013, upi semiconductor corp. upi semiconductor corp. headquarter 9f.,no.5, taiyuan 1st st. zhubei city, hsinchu taiwan, r.o.c. tel : 886.3.560.1666 fax : 886.3.560.1888 upi semiconductor corp. sales branch office 12f-5, no. 408, ruiguang rd. neihu district, taipei taiwan, r.o.c. tel : 886.2.8751.2062 fax : 886.2.8751.5064 upi confidential
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