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confidential datasheet version 1.0 march 2011. page 1 map3222 C dual channel high brightness led driver ordering information typical application part number top marking ambient temperature range package rohs status MAP3222SIRH map3222 -40 to +85 soic-20 pin halogen free general description map3222 is high efficiency dual channel boost type pwm driver in single package. it is designed for hi gh brightness led driver optimized for backlighting system for large size lcd module. map3222 offers the function of accurate and fast le d dimming control using pwm interface and external dimming mosfet. map3222 has the over-voltage protection, uvlo, led short current and boost switch current limit protection. map3222 is available in soic-20 pin package with halogen-free (fully rohs compliant). for more information, please contact local magnachi p sales office in world-wide or visit magnachips web site at www.magnachip.com . features dual output into single package wide input voltage range up to 20v pwm dimming current mode control type auto restart mode protection programmable output over voltage protection programmable led short current protection boost switch current limit protection power good package : soic-20 pin applications high brightness white led backlighting for lcd tvs and monitors general led lighting applications datasheet - map3 222 dual channel high brightness led driver
confidential datasheet version 1.0 march 2011. page 2 map3222 C dual channel high brightness led driver pin configuration pin description pin no description 1 vcc power supply input 2 pdimo1 ch#1 dimming pwm gate driver output 3 isen1 ch#1 led current sense connected to error a mp. inverting input 4 pgood power good 5 comp1 ch#1 error amp. compensation 6 ovp1 ch#1 over voltage protection 7 pdimi1 ch#1 dimming pwm gate driver input 8 cs1 ch#1 current sense of the boost convert 9 gate1 ch#1 gate drive output for boost convert 10 pgnd power gnd 11 gate2 ch#2 gate drive output for boost convert 12 cs2 ch#2 current sense of the boost convert 13 nc no connection 14 adim analog dimming for ch#1 and ch#2 15 pdimi2 ch#2 dimming pwm gate driver input 16 ovp2 ch#2 over voltage protection 17 comp2 ch#2 error amp. compensation 18 isen2 ch#2 led current sense connected to error amp. inverting input 19 pdimo2 ch#2 dimming pwm gate driver output 20 sgnd signal gnd
confidential datasheet version 1.0 march 2011. page 3 map3222 C dual channel high brightness led driver functional block diagram 1msec timer + - 8.2v/7.2v vcc good 5v bg r 2.5r gm amp1 7 s r q qb 8 2 vcc good 1 vcc vref cs1 isen1 pdimi1 pgnd pwmo1 gate1 vcc good 3 leb + - 9 prot1 5 comp1 r 2.5r gm amp2 15 s r q qb 12 ck 19 vcc good cs2 isen2 pdimi2 pdimo2 gate2 vcc good 18 leb + - 11 prot2 17 comp2 200khz oscillator ck + - ar protection (1msec) isen1 prot1 ovp1 adim 14 6 10 + - + - ck ovp2 16 + - ar protection (1msec) isen2 prot2 3v/2.7v + - + - 3v/2.7v 13 nc sgnd 20 + - pgood + - 4 uvlo comparator ovp1 comparator adim comparator scp1 comparator scp2 comparator ovp2 comparator 5v 1.4v adim*4 5v 1.4v adim*4 default h default h 3r 1.25r isen2 isen1 s r q 1msec timer s r q ck ck prot1 prot2 vcc good vcc good 3.3v
confidential datasheet version 1.0 march 2011. page 4 map3222 C dual channel high brightness led driver absolute maximum ratings parameter value unit vcc -0.3 ~ 24 v gate1/2, pdimo1/2 -0.3 ~ 24 v pdimi1/2, cs1/2, comp1/2, isen1/2, adim, ovp1/2 -0.3 ~ 5.5 v pgood -0.3 ~ 3.5 v operating junction temperature range -40 ~ 125 storage temperature range -65 ~ 150 lead temperature(soldering, 10sec ) 260 thermal resistance ( ja) 90 /w
confidential datasheet version 1.0 march 2011. page 5 map3222 C dual channel high brightness led driver electrical characteristics v cc =12v, v pdimi =5v, c gate =c pdimo =1nf, ta=25 , unless otherwise specified symbol parameter test condition min typ max unit supply v cc,op input voltage range ta=-40 ~ 85 8.7 - 20 v i q operation quiescent current pdimi 1/2 =0v - 2 4 ma i op operation current pdimi 1/2 =5v - - 20 ma v uvlo under-voltage lockout release threshold - 7.7 8.2 8 .7 v under-voltage lockout hysteresis - - 1 - v oscillator f osc oscillator frequency ta= 25 190 200 210 khz ta= -40 ~ 85 180 200 220 khz d max maximum duty cycle - - 90 - % gate (ch1, ch2) i source gate short circuit current v gate =0, v cc =12v 0.4 - - a i sink gate sink current v gate =12v, v cc =12v 0.8 - - a t rise gate output rise time c gate =1nf, v cc =12v - 50 85 ns t fall gate output fall time c gate =1nf, v cc =12v - 25 45 ns current sense (ch1, ch2) t blank leading edge blanking - 100 - 375 ns t delay delay to output of cs comparator(2) v comp =5v v cs =0v to 600mv step pulse - - 180 ns v cs,max maximum cs voltage vcc=12v, v adim C v isen > 0.2 0.35 0.4 0.45 v internal transconductance opamp (ch1, ch2) a v open loop dc gain(2) - - 70 - db v cm input common-mode range - 0.1 - 3.0 v v o output voltage low limit vcc=12v, v isen C v adim > 0.2 - 0.6 - v output voltage high limit vcc=12v, v adim C v isen > 0.2 - 2.6 - v gm transconductance(2) - 400 670 1000 ua/v i bias input bias current - - 0.5 1 na
confidential datasheet version 1.0 march 2011. page 6 map3222 C dual channel high brightness led driver electrical characteristics (continued) v cc =12v, v pdimi =5v, c gate =c pdimo =1nf, ta=25 , unless otherwise specified symbol parameter test condition min typ max unit internal transconductance opamp (ch1, ch2) v offset input offset voltage - -5 - 5 mv i _amp_source amp source current v isen =1v, v adim =2v, comp =1.5v - -100 - ua i _amp_sink amp sink current v isen =2v, v adim =1v, comp =1.5v - 100 - ua dimming pwm input (ch1, ch2) v pdimi(lo) pdimi input low voltage - - - 0.8 v v pdimi(hi) pdimi input high voltage - 2.0 - - v r pdimi pdimi pull-down resistance v pdimi =5v 50 100 150 ? dimming pwm output (ch1, ch2) t rise,pdimo pdimo output rise time 1nf capacitance at pdimo - - 300 ns t fall,pdimo pdimo output fall time 1nf capacitance at pdimo - - 200 ns auto restart protection ( ovp & scp ) t ar auto restart time - - 1 - msec over voltage protection (ovp) v ovp over voltage protection - 2.9 3.0 3.1 v v ovph over voltage protection hysteresis - 0.3 - v t ovp ovp filtering time(2) - 200 - ns short current protection ( scp ) v th,scp scp comparator threshold voltage v adim = 1v ( v th,scp =v adim * 4) 3.6 4 4.4 v v scp scp comparator input range - 1.4 - 5.0 v t off propagation time for short current detection (2) v adim =1v, v isen =3 to 5v step v pdimo goes from high to low - - 250 ns pgood impedance r up pull-up resistance pgood = 3.3v - 9 - ? r down pull-down resistance - 1.5 - ?
confidential datasheet version 1.0 march 2011. page 7 map3222 C dual channel high brightness led driver note 1 : 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 st ress ratings only. note 2 : these parameters, although guaranteed by design, are not tested in mass production.
confidential datasheet version 1.0 march 2011. page 8 map3222 C dual channel high brightness led driver typical operating characteristics unless otherwise noted, v cc = 12v, v pdimi = 5v, and t a = 25 c. operation current vs. vcc quiescent current vs. tem p quiescent current vs. vcc operation current vs. temp under voltage lock out (uvlo) frequency vs. t emp
confidential datasheet version 1.0 march 2011. page 9 map3222 C dual channel high brightness led driver typical operating characteristics unless otherwise noted, v cc = 12v, v pdimi = 5v, and t a = 25 c. over voltage protection.(ovp) power good @ adim = 1v powe r good @ adim = 2v power good @ adim = 3v short current protection. (scp) @ adim = 0.1v short current protection. (scp) @ adim = 1.0v
confidential datasheet version 1.0 march 2011. page 10 map3222 C dual channel high brightness led driver application information map3222 has an independent dual channel boost type led driver. so, it can be controlled independently. current mode boost switching regulator operation map3222 is being used current mode control scheme f or boost regulation so its response is fast and output voltage is stable. map3222 is designed to be operated in dcm so map322 2 can be unstable when it operates in ccm and duty cy cle is 50% or higher. supply voltage and oscillator map3222 has wide input voltage ranged from 8.5v to 20v. 1uf decoupling capacitor is used to stabilize the i nternal regulator and minimize noise on vcc pin. this decou pling 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 map3222 is being operated at fixed 200khz and max d uty is 90%. led current input setting (adim input) map3222s led current is set by the voltage on adim pin 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 is recommended that adim input voltage is hi gher than 0.4v. dimming pwm input map3222s pdimi signal is used for both enable and pwm dimming input. map3222 is enabled when pdimi voltag e is higher than 2.0v and disabled when pdimi voltage is lower than 0.8v. this pin has internal 100kohm pull down resistance pwm input condition high enable low disable protection map3222 has under voltage lock out (uvlo), boost switch current limit, output over voltage protectio n (ovp), led short current protection(scp). when ovp and led scp are happened, map3222 monitors if the failure condition is released or no t every 1ms. this is map3222s auto restart function. 1. under voltage lock out (uvlo) when vcc is higher than 8.2v, map3222s internal 5v regulator and internal circuitry like oscillator, p rotections, gate drivers and pdimo drivers are enabled, and the map3222 starts to operate when pdimi voltage is hig her than 2.0v. if vcc is lower than 7.2v, map3222 is disable due t o its under voltage lock out. fig 2. schematic for under voltage lock out 2. boost current limit and current sense (cs) map3222 has the boost current limit function. if th e voltage on cs pin is higher than 0.4v (typ.), the g ate pulse is limited every pulse. map3222 has 100ns (min.) le ading edge blank.
confidential datasheet version 1.0 march 2011. page 11 map3222 C dual channel high brightness led driver 3. output over voltage protection (ovp) when map3222s output voltage is increased abnormal ly, map3222 stops the switching to protect external com ponents. fig 3. schematic for over voltage protection map3222 has 200ns (typ.) low pass filter on ovp pin , but using external capacitor (ca) is recommended to min imize noise. the total values of r1 and r2 need to be low er than 1mohm. ovp threshold voltage is 3.0v and ovp voltage can b e set as below. - ovp set voltage : 2 2 1 0.3 1 r r r v o + = - ovp release voltage : 2 2 1 7.2 1 r r r v o + = ch1: ovp, ch2: gate, ch3: vout fig 4. ovp waveform 4. led short current protection (scp) to protect external components, map3222 has the led short protection. if the led scp threshold voltage change s based on adim voltage as below, so if isen voltage is hig her than led scp threshold voltage, map3222 will be in led s cp mode disabling gate for boost mosfet and dimming mosfet. . fig 5. scp threshold voltage based on adim voltage ch1: isen, ch2: gate, ch3: pwmo, ch3: i_led fig 6. led scp waveform 5. auto-restart protection the map3222 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 fixed at 1ms, it is recovered to normal operating mode if scp or ovp condition is cleared. 6. power good (pgood) map3222 has the pgood pin to send out the led current status. pgood will be high when the led cur rent is higher than 70% of normal led current and will b e low when the led current is below 70%.
confidential datasheet version 1.0 march 2011. page 12 map3222 C dual channel high brightness led driver ch1: pdimi, ch2: adim, ch3: isen, ch4: pgood fig 7. start-up pgood waveform 1) power good scheme at ovp protection. ch1: ovp, ch2: gate, ch3: vout, ch4: pgood fig 8. pgood waveform @ ovp protection when ovp happens, pgood is low and latch immediately. pgood reset should be only shut down of ic vcc. 2) power good scheme at scp protection. ch1: pdimo, ch2: adim, ch3: isen, ch4: pgood fig 9. pgood waveform @ scp protection when scp happens, pgood is low and latch immediately. pgood reset should be only shut down of ic vcc.
confidential datasheet version 1.0 march 2011. page 13 map3222 C dual channel high brightness led driver evaluation board schematic condition : vin=120v, vout = 63leds, led current = 130ma, ovp set = 303v, release = 272v, sw frequency =200khz active high c13 c4 c2 q1 q2 l1 c1 c14 c15 c3 c5 1 5 6 15 16 13 10 18 12 3 2 8 9 19 vin vcc q1-d vo1(+) gate ovp1 pdimo1 pdimo2 sgnd isen1 gnd gate1 cs1 cs2 d3 d2 d1 isen2 vo1(-) vo1(+) vo1(-) c6 pdimi1 11 q4 c19 pdimo3 pdimo4 isen3 d6 isen4 vo2(-) c17 q3 l2 c18 q3-d vo2(+) gate2 gate3 cs3 cs4 d5 d4 vo2(+) vo2(-) 4 c10 c9 17 7 14 c11 ovp2 vo1(+) vo2(+) 5v pdimi2 20 gnd1 c16 gnd2 gnd3 gnd4 gnd5 gnd6 gnd8 comp1 comp2 c7 c8 gnd7 adim pdimi1 pdimi2 q5 q6 q7 q8 sgnd1 pgnd c12 evaluation board part list spec vendor p/n input capacitor 10uf/400v samwha 1 rd22uf/400v output capacitor 10uf/400v samwha 1 rd10uf/400v inductor 150uh abco 2 lpf1280-151 boost mosfet 3a/400v, n-ch, sot223 magnachip mdht3n40 dimming mosfet 3a/400v, n-ch, sot223 magnachip mdht3n40 ultrafast diode 1a/1000v vishay uf4007 ic pwm controller magnachip map3222 1. samwha : 1) electrolytic capacitor, samwha electric tel : +8 2-43-261-0200, http://www.samwha.co.kr/electric 2) mlcc capacitor, samwha capacitor tel : +82-31-33 0-5872, http://www.samwha.co.kr/capacitor 2. abco tel : +82-31-730-5000, http://www.abco.co.kr
confidential datasheet version 1.0 march 2011. page 14 map3222 C dual channel high brightness led driver 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
confidential datasheet version 1.0 march 2011. page 15 map3222 C dual channel high brightness led driver revision history date version changes 2011-03-18 version 1.0 initial release

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