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confidential datasheet version 1.0 december 2012 page 1 MAP3301B C single channel led driver with internal dimming mosfet ordering information typical application part number top marking ambient temperature range package rohs status MAP3301Bsirh MAP3301B -40 to +85 soic-15 pin halogen free general description MAP3301B is a single channel boost type pwm driver with high efficiency. it is designed for high brigh tness led driver optimized of backlighting system for lcd module. MAP3301B provides small solution size with internal high voltage & current dimming mosfet and internal references. MAP3301B offers the function of accurate and fast led dimming control using pwm interface. MAP3301B has the input line under voltage protectio n, led open/short protection and power good indication. MAP3301B is available in soic-15 pin package with halogen-free (fully rohs compliant). features wide input voltage : 8.5v ~ 33v internal dimming mosfet pwm & analog dimming current mode control type fixed switching frequency : 200khz auto restart mode protection programmable output over voltage protection programmable input line voltage protection led short current protection power good indication (open drain) small package : soic-15 pin applications high brightness white led backlighting for lcd tvs and monitors general led lighting applications datasheet - MAP3301B single channel led driver with internal dimmi ng mosfet for sharp only
confidential datasheet version 1.0 december 2012 page 2 MAP3301B C single channel led driver with internal dimming mosfet pin configuration pin description pin no description 1 vdd output for gate drive voltage 2 gate gate drive output for boost convert 3 cs current sense of the boost convert 4 gnd ground 5 adim analog dimming using dc voltage level 6 vldo reference voltage 7 pgood output power good indication (open-drain status output, normal : open, protecti on : internal gnd) 8 sou internal dim mosfet source 9 drn internal dim mosfet drain 11 comp error amp. compensation 12 ovp over voltage protection 13 luvp input line under voltage protection 14 pwmi pwm dimming input 15 en enable 16 vcc input power supply for sharp only
confidential datasheet version 1.0 december 2012 page 3 MAP3301B C single channel led driver with internal dimming mosfet functional block diagram for sharp only
confidential datasheet version 1.0 december 2012 page 4 MAP3301B C single channel led driver with internal dimming mosfet absolute maximum ratings parameter value unit vcc -0.3 ~ 36 v gate, pwmi, luvp, vdd -0.3 ~ 20 v vldo, cs, comp, adim, pgood, sou, ovp, en -0.3 ~ 5 v drn voltage 400 v drn current 3.4 a operating junction temperature range -40 ~ 125 absolute temperature range (1) -40 ~ 150 storage temperature range -65 ~ 150 lead temperature(soldering, 10sec ) 260 thermal resistance ( ja) 70 /w note 1 : normal electrical operating is not guaranteed out of the operating junction temperature range. for sharp only
confidential datasheet version 1.0 december 2012 page 5 MAP3301B C single channel led driver with internal dimming mosfet electrical characteristics v cc =12v, v pwmi =5v, c gate =1nf, ta=25 , unless otherwise specified symbol parameter test condition min typ max unit supply v cc,op input voltage range ta = - 40 ~ 85 8.5 - 33 v i sd shut down current en = 0v 40 80 160 ua i q operation quiescent current pwmi = 0v, en = 5v - 2 .5 5.0 ma i op operation current pwmi = 5v, en = 5v - 10 - ma v en v en_l : logic low - - - 0.8 v v en_h : logic high - 2.0 - - v r en enable pull down resistor en = 5v 60 120 240 ? v uvlo under-voltage release threshold - 7.5 8 8.5 v under-voltage lockout hysteresis - - 1 - v v ldo & v dd v ldo reference pin voltage ta = - 40 ~ 85 4.875 5.00 5.125 v ta = 25 4.925 5.00 5.075 v v ldoli line regulation iref = 0ua, pwmi = 0v, cref = 0.1uf - - 0.02 %/v v ldolo load regulation iref = 0~500ua, pwmi = 0v, cref = 0.1uf - - 1 %/ma v dd gate drive voltage ta = 25 , vcc > 12v, no load - 10 - v oscillator f osc oscillator frequency ta = 25 190 200 210 khz d max maximum duty cycle - - 90 - % gate i source gate short circuit current v gate = 0, v cc = 12v 0.05 0.18 - a i sink gate sink current v gate = 10v, v cc = 12v 0.15 0.28 - a t rise gate output rise time c gate = 1nf, v cc = 12v - 50 - ns t fall gate output fall time c gate = 1nf, v cc = 12v - 25 - ns v gate gate output voltage - - 10 - v for sharp only
confidential datasheet version 1.0 december 2012 page 6 MAP3301B C single channel led driver with internal dimming mosfet electrical characteristics (continued) v cc =12v, v pwmi =5v, c gate =1nf, ta=25 , unless otherwise specified symbol parameter test condition min typ max unit current sense t blank leading edge blanking - 100 - 375 ns t delay delay to output of cs comparator (3) v comp = 5v v cs = 0v to 600mv step pulse - - 180 ns v cs,max maximum cs voltage v cc = 12v, v adim C v sou = 0.2v 0.44 0.49 0.54 v internal transconductance opamp a v open loop dc gain (3) - - 53 - db v cm input common-mode range - 0.1 - 3.0 v v o output voltage low limit v cc = 12v, v adim C v sou = 0.2v - 0.6 - v output voltage high limit v cc = 12v, v adim C v sou = 0.2v - 2.6 - v gm transconductance (3) - 400 670 1000 ua/v i bias input bias current - - 0.5 1 na v offset input offset voltage - -5 - 5 mv i _amp_source amp source current v adim = 2v, v sou = 1v, v comp = 1.5v - -100 - ua i _amp_sink amp sink current v adim = 1v, v sou = 2v, v comp = 1.5v - 100 - ua pwm input v pwmi(lo) pwmi input low voltage - - - 0.8 v v pwmi(hi) pwmi input high voltage - 2.0 - - v r pwmi pwmi pull-down resistance v pwmi = 5v 50 100 200 ? pwm output t rise.delay pwmi_high to drn on delay time - - 1.0 1.5 us t fall.delay pwmi_low to drn off delay time - - 0.8 1.2 us soft-start t ss time for internal soft-start - - 10 - ms for sharp only
confidential datasheet version 1.0 december 2012 page 7 MAP3301B C single channel led driver with internal dimming mosfet electrical characteristics (continued) v cc =12v, v pwmi =5v, c gate =1nf, ta=25 , unless otherwise specified symbol parameter test condition min typ max unit auto restart protection ( ovp & luvp & scp ) t ar auto restart time - - 1 - ms over voltage protection ( ovp ) v ovp over voltage protection - 2.94 3.0 3.06 v v ovph over voltage protection release voltage - 2.7 - v t ovp ovp filtering time (3) - 200 - ns line under voltage protection ( luvp ) v line line under voltage protection - 1.7 1.8 1.9 v v lineh line under voltage protection release voltage - - 2.0 - v t luvp luvp filtering time (3) - - 200 - ns short current protection ( scp ) v th,scp scp comparator threshold voltage v adim = 0.5v (v th,scp = v adim * 4) 1.8 2.0 2.2 v v scp scp comparator input range - 1.4 - 4.0 v t off propagation time for short current detection (3) - - - 250 ns power good indication C open drain (normal : open, abnormal : internal gnd) r pgood power good on resistance (3) v pgood = 1v - 10 100 ohm internal dimming mosfet bv dss drain-source breakdown voltage i d = 250 a, v cc = 0v 400 - - v i dss drain cut-off current v ds = 410v, vpwmi = 0v - - 1 ua r ds(on) drain-source on resistance v gs = 10v, i d = 1.7a - - 2.5 t sd thermal shutdown temperature shutdown temperature - 150 - c hysteresis, ? t sd - 30 - note 2 : stress beyond the maximum ratings listed above ma y incur permanent damage to the device. operating a bove the recommended conditions for extended time may stress the device and affect device reliability. also the device may not operate normally above the recommended operating conditions . these are stress ratings only. note 3 : these parameters, although guaranteed by design, are not tested in mass production. for sharp only
confidential datasheet version 1.0 december 2012 page 8 MAP3301B C single channel led driver with internal dimming mosfet typical operating characteristics unless otherwise noted, v cc = 12v, v pwmi = 5v. operation current vs. temp quiescent current vs. temp vdd vs. temp fosc vs. temp vldo vs. temp for sharp only
confidential datasheet version 1.0 december 2012 page 9 MAP3301B C single channel led driver with internal dimming mosfet application information current mode boost switching regulator operation MAP3301B is being used current mode control scheme fo r boost regulation so its response is fast and output voltage is stable. supply voltage and oscillator MAP3301B has wide input voltage ranged from 8.5v to 33 v. 1uf decoupling capacitor is used to stabilize the i nternal regulator and minimize noise on vcc pin. this decoup ling capacitor should be placed next to vcc pin. ceramic capacitor is recommended and incorrect placement of this decoupling capacitor may cause the oscillation in t he switching waveform MAP3301B is being operated at fixed 200khz switching frequency and max duty is 90%. led current input setting (adim input) MAP3301Bs led current is set by the voltage on adim pi n and led sense resistor value as below. fig 1. schematic for led current set r _ sense _ current _ led v = i adim led the voltage range on adim pin is 0.1v ~ 3.0v. but it i s recommended that adim input voltage is higher than 0 .4v. the gm amp input v offset is 5mv. if adim voltage use to below 0.4v, led current tolerance is increases. dimming pwm input MAP3301Bs pwmi signal is used for both enable and pwm dimming input. MAP3301B is enabled when pwmi voltage is higher than 2.0v and disabled when pwmi voltage is lower than 0.8v. this pin has internal 1 00kohm pull down resistance pwm input condition high (2.0v) enable low (0.8v) disable enable input MAP3301Bs offers an enable function. MAP3301B is enabled when en voltage is higher than 2.0v and disab led when en voltage is lower than 0.8v. this pin has int ernal 125kohm pull down resistance en input condition high (2.0v) enable low (0.8v) disable protection MAP3301B has under voltage lock out (uvlo), boost switch current limit, output over voltage protection (ovp), line under voltage protection(luvp), led short current protection(scp). when ovp and led scp are happened, MAP3301B monitors if the failure condition is released or no t every 1ms at fs 200khz. this is MAP3301Bs auto restart function. 1. under voltage lock out (uvlo) when vcc is higher than 8.0v, MAP3301Bs internal 5v regulator and internal circuitry like oscillator, p rotections, gate drivers and pdimo drivers are enabled, and the MAP3301B starts to operate when pwmi voltage and en signal are higher than 2.0v. if vcc is lower than 7.0v, MAP3301B is disable due to its under voltage lock out. 2. boost current limit and current sense (cs) MAP3301B has the boost current limit function. if the voltage on cs pin is higher than 0.49v (typ.), the ga te pulse is limited every pulse. MAP3301B has 100ns (min.) leading edge blank. 3. output over voltage protection (ovp) when MAP3301Bs output voltage is increased abnormally, MAP3301B stops the switching to protect external components. MAP3301B has 200ns (typ.) low pass filter on ovp pin, but using external capacitor is recommended to minimize noise. the total values of r ovph and r ovpl need to be lower than 1mohm. for sharp only
confidential datasheet version 1.0 december 2012 page 10 MAP3301B C single channel led driver with internal dimming mosfet ovp threshold voltage is 3.0v and ovp voltage can be s et as below. - ovp set voltage : ovpl ovpl ovph o r r + r 0.3 = v - ovp release voltage : ovpl ovpl ovph o r r + r 7.2 = v 4. line under voltage protection (luvp) when line voltage is low voltage input, to prevent the stress of the transition for power component, MAP3301B stops the switching to protect external components. MAP3301B has 200ns (typ.) low pass filter on luvp pin, but using external capacitor is recommended to minimize noise. the total values of r luvph and r luvpl need to be lower than 1mohm. luvp threshold voltage is 2.0v and luvp voltage can be set as below. - luvp set voltage : luvpl luvpl luvph in r r + r 8.1= v - luvp release voltage : luvpl luvpl luvph in r r + r 0.2 = v 5. led short current protection (scp) to protect external components, MAP3301B has the led short protection. if the led scp threshold voltage ch anges based on adim voltage as below, so if sou voltage is higher than led scp threshold voltage, MAP3301B will be in led scp mode disabling gate for boost mosfet and dimming mosfet. . fig 2. scp threshold voltage based on adim voltage 6. auto-restart protection the MAP3301B offers auto restart protection function which is recovered into normal operation mode when protection condition is cleared. the auto restart t ime (t ar ) is 1ms at fs 200khz. it is recovered to normal operating mode if scp or o vp or luvp condition is cleared. 7. power good (pgood) MAP3301B has the pgood pin to send out the led current status. pgood will be high when the led curre nt is higher than 70% of normal led current. 1) power good scheme at ovp protection. when ovp happens, pgood is low and latch immediately. pgood reset should be only shut down of ic vcc or en signal 2) power good scheme at scp protection. when scp happens, pgood is low and latch immediately. pgood reset should be only shut down of ic vcc or en signal. 3) pgood pull up resistance is recommending over than 100kohm. for sharp only
confidential datasheet version 1.0 december 2012 page 11 MAP3301B C single channel led driver with internal dimming mosfet inductor selection inductor value should be decided before system desi gn. because the selection of the inductor affects the op erating mode of ccm (continuous current mode) or dcm (discontinuous current mode), in ccm operation, ind uctor size should be bigger, even though the ripple current an d peak current of inductor can be small. in dcm operation, even ripple current and peak curr ent of inductor should be large while the inductor size can be smal ler so that it is more effective in blu of tv and notebook applicatio n. the following is the equation to calculate max valu e of inductor. 2 t r d d)-1( = l (min) s (max) o 2 critical) ( where, r 0(max) = maximum output impedance t s(min) = minimum switching period l (inductance) > l (critical) ccm l (inductance) < l (critical) dcm out in v v -1= d , out out (max) o i v = r , s (min) s f 1 = t loop compensation the MAP3301B controls in current mode. current mode easily achieves compensation by consisting simple single p ole from double pole that lc filer makes at voltage mode in general, crossover frequency is selected from 1/ 3 ~ 1/6 range of the switching frequency. if fc is large, there is p ossibility of oscillation to occur, although time response gets b etter. on the other hand, if fc is small, time response wi ll be bad, while it has improved stability, which may cause over shoot or under shoot in abnormal condition. for sharp only
confidential datasheet version 1.0 december 2012 page 12 MAP3301B C single channel led driver with internal dimming mosfet physical dimensions magnachip semiconductor ltd. doesnt not recommend the use of its products in h ostile environments, including, without limitation, aircraft, nuclear power generation, medical applian ces, and devices or systems in which malfunction of any product can reasonably be expected to result in a personal injury. seller s customers using or selling sellers products for use in such applications do so at their own risk and agree to fully defend and indemn ify seller. magnachip reserves the right to change the specifications an d circuitry without notice at any time. magnachip does not consider responsibility for use of any circuitry other than circuitry entirely included in a magnachip product. is a registered trademark of magnachip semiconducto r ltd. magnachip semiconductor ltd. 891, daechi-dong, kangnam-gu, seo ul, 135-738 korea tel : 82-2-6903-3451 / fax : 82-2-6903-3668 ~9 www.magnachip.com for sharp only
confidential datasheet version 1.0 december 2012 page 13 MAP3301B C single channel led driver with internal dimming mosfet revision history date version changes 2012-12-18 version 1.0 initial release for sharp on ly. for sharp only

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