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technology FP1451 dual channel pwm control ic with scp/dtc function general description the FP1451, a 1-chip composed of dual open co llector transistor pulse-wid th-modulation control circuit s with two error amplifie rs and dead-time comp arators (dtc), the FP1451 cont ains a 2.5v precision volt age reference regulator , under-volt age lockout circuit (uvlo), short circuit protection circuit (scp), applied to of fer sp ace and low cost in many applications such as the dc/dc converter and backlight inverter . using few external component s, FP1451, a high performance integrated ic, is designed for a control circuit. the circuit diagram of the typical application example is as below . fea t ures so p1 6 ? fixed reference v o lt age: 2.5v ? reference v o lt age precision: 2% (FP1451) ? output sink current up to 100ma ? low quiescent supply current ? wide operating volt age range: 3.6~40v ? v a riable dead-time control (dtc) ? uvlo protection function pd i p 1 6 ? scp protection function ? oscillator frequency: max. 500khz ? package: sop16 / pdip16 typical applica t ion ? dc/dc converters for video cameras and tft lcd monitor ? back light ccfl inverter . rev0.5 apr . 01, 2004 p1/FP1451
technology FP1451 functional block diagram o s c i l l at or r e fer ence volt age 10 7 8 1 2 16 15 3 4 5 6 13 14 12 11 9 r sr uv l o 1/ 2 v r ef pwm comp pwm comp mark view pin description name n o. st a t us description ct 1 i connect a cap a citor for oscillator r t 2 i connect a resistor for oscillator ea1+ 3 i error amplifier 1 non-inverting input ea1- 4 i error amplifier 1 inverting input f b 1 5 o error amplifier 1 f eedback output dt c1 6 i output 1 dead-t i me comp arator out 1 7 o open collector output 1 gnd 8 p ic g r o u n d vcc 9 p ic pow e r supply out 2 10 o open collector output 2 dt c2 1 1 i output 2 dead-t i me comp arator f b 2 1 2 o error amplifier 2 f eedback output ea2- 1 3 i error amplifier 2 inverting input ea2+ 1 4 i error amplifier 2 non-inverting input scp 1 5 i short circuit protection input vref 16 o 2.5v reference v o lt age output f p 1451 1 2 3 4 8 7 6 5 9 10 11 12 13 14 15 16 - l rev0.5 apr . 01, 2004 p2/FP1451
technology FP1451 order informa t ion part number operating t e mperature p ackage description FP1451p-lf -20c ?? 85c p d i p 1 6 t u b e FP1451d-lf -20c ?? 85c s o p 1 6 t u b e FP1451dr-lf -20c ?? 85c sop16 t ape & reel ic da te code distinguish fp 1 4 5 - 1 l year per half month lot number mass production version lead free for example: january a (front half month), b (last half month) february c, d m a r c h e, f ------------and so on lot number is the last two numbers for example: a 3311c lo t n u m b e r 62 rev0.5 apr . 01, 2004 p3/FP1451
technology FP1451 absolute maximum ra tings supply v o lt age (vcc)---------------------------------------------------------------------------------------- +40v dif f erential input v o lt age(v id ) ----------------------------------------------------------------------------- +20v collector output v o lt age(v o ) ----------------------------------------------------------------------------- +40v collector output cu rrent (io) ------------------------------------------------------------------------- + 150ma maximum junction t e mperature (t j ) ------------------------------------------------------------------ 150c thermal resist ance junction to am bient (sop p a ck age) ---------------------------------- 175c /w power dissip a tion sop16 p a ckage ta = 2 5 j ---------------------------------------------------------------------------------------------------- 650mw ta = 7 0 j ----------------------------------------------------------------------------------------------------- 550mw pdip16 p a ckage ta = 2 5 j -------------------------------------------------------------------------- --------------------------1000m w ta = 7 0 j ----------------------------------------------------------------------------------------------------- 640mw operating t e mperat ure range ----------------------------------------------------------------- -20c ?? 85c s t orage t e mperatur e range ------------------------------------------------------------------ -65c ?? 150c sop16 lead t e mperature (s oldering, 10 sec) --------------------------------------------------+260 j pdip16 lead t e mperature (s oldering, 20 sec) -------------------------------------------------+260 j 260 j 180 j 25 j 15s 60s 190s 210 j 280s 260 j / 10 sec -1.2 j / sec +0.23 j / sec +3.4 j / sec rev0.5 apr . 01, 2004 p4/FP1451
technology FP1451 dc electrical characteristics electrical characteristics over recomm ended operating free-air temperature range, v cc =6v , f=200khz (unless otherwise noted) reference section p a ra m e t e r s y m b o l t est c o n d i t i o n s min t y p ma x unit output volt age (pin 16) v re f i o = 1 m a 2 . 4 5 2 . 5 2 . 5 5 v t a =-2 0 j to 25 j - 0 . 1 % 1 % output volt age change w i th t e mperature t a =2 5 j to 85 j - 0 . 2 % 1 % input volt age regulation ? v re f /v re f vcc= 3.6v ?? 40v 2 1 2 . 5 m v output volt age regulation ? v re f /v re f io = 0.1ma to 1 ma 1 7.5 mv short-circuit output current i sh or t v o = 0 3 1 0 3 0 m a underv olt a ge lockout section p a ra m e t e r s y m b o l t est c o n d i t i o n s min t y p ma x unit upper threshold volt age(vcc) v u pper 2 . 7 2 v low er threshold volt age(vcc) v low 2 . 6 v hy steresis (vcc) v hys 8 0 1 2 0 m v reset threshold volt age(vcc) v r eset i o( ref) = 0.1 ma, t a =2 5 j 1 . 5 1 . 9 v short-circuit protection control section p a ra m e t e r s y m b o l t est c o n d i t i o n s min t y p ma x unit input threshold volt age (scp) v th t a = 2 5 j 0.65 0 . 7 0 . 7 5 v s t andby volt age (scp) v st an d b y n o p u l l u p 140 1 8 5 2 3 0 m v latched input volt age (scp) v la t c h n o p u l l u p 6 0 1 2 0 m v input (source) current i s o urce v i =0 .7 v , t a =2 5 j - 1 0 - 1 5 - 2 0 ga comp arator threshold volt age (feedback) v co mp (t h) 1 . 1 8 v oscillator section p a ra m e t e r s y m b o l t est c o n d i t i o n s min t y p ma x unit f r equency f c t = 330pf ,r t = 1 0 k 2 0 0 kh z s t andard deviation of frequency ? f c t = 330pf ,r t = 1 0 k 1 0 % f r equency change w i th volt age ? f/ ? v v cc =3.6v to 40v 1% t a =-2 0 j to 25 j - 0 . 4 % 2 % f r equency change w i th t e mperature ? f/ ? t t a =2 5 j to 85 j - 0 . 2 % 2 % dead-time control section p a ra m e t e r s y m b o l t est conditions m in t y p ma x unit input bias current (dt c ) i bias 1 ga latch mode (source) current(dt c ) i s o urce t a =2 5 j -80 - 2 0 0 ga latched input volt age (dt c ) v la t c h i o =4 0 g a 2 . 3 v z e ro duty cy cle 2.05 2.25 input threshold volt age at f= 10kh z (dt c ) v th maximum duty cy cle 1.2 1.45 v rev0.5 apr . 01, 2004 p5/FP1451
technology FP1451 dc electrical characteristics (cont.) error ?amplifier section p a ra m e t e r s y m b o l t est conditions m i n t y p ma x unit input of fset volt age v io v o (feedback)=1.25v 6 m v input of fset current i io v o (f eedback)= 1 .25v 1 0 0 n a input bias current i bias v o (f eedback)= 1 .25v 1 6 0 5 0 0 n a common-mode input volt age range v icm v cc = 3 .6v to 40 v 0.3 1.6 v open-loop volt age amplification a vo r f = 200k [ 7 0 8 0 d b unity - gain bandw id th bw 1.5 mh z common-mode rejection ratio cmrr 60 80 db positive output volt age sw ing v pos vr e f - 0 . 2 v negative output volt age sw ing v ne g 1 v output (sink) current (feedback) i sin k v id = ?e 0.1v ,v o = 1 .25v 1 4 . 0 m a output (source) current (feedback) i s o urce v id =0.1v , v o = 1 . 2 5 v - 4 5 - 9 0 ga output section p a ra m e t e r s y m b o l t est c o n d i t i o n s min t y p ma x unit collector of f-st ate current i off v o = 4 0 v 1 0 g a output saturation volt age v sa t i o = 1 0 m a 0 . 7 1 v short-circuit output current i sc v o = 6 v 1 5 0 m a pw m comp arator section p a ra m e t e r s y m b o l test conditions m in t y p ma x unit z e ro duty cy cle 2.05 2.25 input threshold volt age at f=10khz(feedback) v th maximum duty cy cle 1.2 1.45 v t o t a l dev i ce p a ra m e t e r s y m b o l test conditions m i n t y p + ma x unit s t andby supply current i st an d b y o f f-st a t e 1 . 3 1 . 8 ma a v erage supply current i av e r t = 1 0 k 1 . 7 2 . 4 ma rev0.5 apr . 01, 2004 p6/FP1451
technology FP1451 typical characteristics reference output voltage variation vs free-air temperature v o (r ef) - refer e nce output v o ltage v a r i ation - mv ? t a - free-air temperature - o c -25 0 2 5 5 0 7 5 100 -30 -20 -10 0 10 20 30 reference output voltage variation vs free-air temperature v o (r ef) - refer e nce output v o ltage v a r i ation - mv ? ta - free-air temperature - o c -25 0 2 5 5 0 7 5 100 -30 -20 -10 0 10 20 30 i (ref) = 1ma vcc = 3.6 v i (ref) = 1ma vcc = 40 v oscillator frequency variation vs free-air temperature f ? osc - o scillator frequency varation - % -25 0 2 5 5 0 7 5 100 -3 -2 -1 0 1 2 3 triangle waveform swing voltage vs timing capacitance triangle waveform sw ing voltage - v ct - timing capacitance - pf o c 0.8 1 1.2 1.4 1.6 1.8 2 2.2 2.4 2.6 1 10 2 10 5 10 3 10 4 10 triangle waveform period vs timing capacitance triangle waveform period - s ct - timing capacitance - pf 12 10 5 10 3 10 4 10 10 -1 10 0 10 1 10 2 10 ta - free-air temperature - t a = 25 o c r t = 5.1 k ? vcc = 5 v t a = 25 o c r t = 5.1 k ? vcc = 5 v c t = 330pf r t = 10 k ? vcc = 3.6 v fosc = 200khz triangle oscillator frequency vs timing resistance f osc - triangle o scillator frequency - hz 1 k 10 k 100 k 1 m 1 k 4 k 10 k 40 k 100 k 400 k 1 m rt - timing resistance - ? vcc = 5 v t a = 25 o c c t = 100 pf t c = 1000 pf c t = 10000 pf figure 1 figure 2 figure 3 figure 4 figure 5 figure 6 rev0.5 apr . 01, 2004 p7/FP1451
technology FP1451 typical characteristics (cont.) reference output voltage vs supply voltage vo(re f) - r e fe re nc e output volta g e - v 0 1 2 3 0 5 10 15 20 25 30 vcc - supply voltage - v undervoltage lockout hysteresis characteristics v c e - out put c o llect or v o lt age - v vcc - supply voltage - v 0 1 2 3 4 5 6 01 4 23 undervoltage lockout characteristic short-circuit protection characteristics c o mpar ator thr eshold voltage - v t a - free-air temperature - o c -25 0 2 5 5 0 7 5 100 1.10 1.15 1.20 1.25 1.30 35 40 0.5 1.5 2.5 5 t a - free-air temperature - o c u d er volt age lockout thr eshold v o lt age - v u nder v olt a ge lockout h yst er sis v o lt age - mv -25 0 2 5 5 0 7 5 100 2 2.25 2.5 2.75 3 3.25 3.5 0 50 100 150 200 250 300 r s - lat c h r eset s upply v o lt age - v 1 1.5 2 2.5 3 t a = 25 o c t a = 25 o c 7,10 8 5 v rl i = io vce io = 0.1ma t a = -20 o c t a = 85 o c threshold voltage - th v (left scale) hysteresis voltage (right scale) threshold voltage - tl v (left scale) short-circuit protection (left scale) comparator threshold voltage short-circuit protection (right scale) latch reset supply voltage error amp maximum output voltage swing vs frequency er r o r a m p maximum output voltage swing - v f - frequescy - hz 0.25 0.5 0.75 1 1.25 1.5 1.75 2 2.25 1k 10k 10m 100k 1m 2.5 t a = 25 o c vcc = 5 v figure 7 figure 8 figure 9 figure 10 figure 11 rev0.5 apr . 01, 2004 p8/FP1451
technology FP1451 typical characteristics (cont.) 1.25 v error amp 1 error amp 2 short - circuit protection comparator c pe s r protection latch u.v.l.o scp 15 vref 16 170 k [ vref vref k [ 12 protection enable time vs protection enable capacitance t p e - pr ot ect ion enable tim e - s c pe - prot ect i on enabl e c a paci t a nce - f 0 5 0 100 150 200 250 0 3 6 9 12 15 18 figure 12 rev0.5 apr . 01, 2004 p9/FP1451
technology FP1451 typical characteristics (cont.) dead - time input voltage - v 0 0.5 1 1.5 2 2.5 3 3.5 4 output tr a n s i s t or " o n" duty cy c l e - % 100 90 80 70 60 50 40 30 20 10 0 output transistor on duty cycle vs dead - time input voltage c t = 330pf r t = 10 k vcc = 3.6 v standby current vs supply voltage ic c ( sta ndby ) - sta ndby cur r e nt - ma vcc - supply voltage - v 01 0 2 0 3 0 4 0 0 0.25 0.5 0.75 1 1.25 1.5 1.75 2 t a = 25 o c standby current vs free - air temperature o c ta - free-air temperature - ic c - supply cur r e nt - ma -25 0 2 5 5 0 7 5 100 0.5 0.75 1 1.25 1.5 1.75 2 2.25 2.5 c t = 330pf r t = 10 k vcc = 6 v average supply current vcc = 40 v, no load standby current vcc = 3.6 v, no load standby current gain (amplifier in unity-gain configuration) vs frequency g - ga in - db f - frequescy - hz - 20 - 15 - 10 - 5 0 5 10 1k 10k 10m 100k 1m t a = 25 o c vcc = 5 v figure 13 figure 14 figure 15 figure 16 rev0.5 apr . 01, 2004 p10/FP1451
technology FP1451 timing w a veform h l h l dead time 100% 0 v 0.6 v h l 0 v 3.6 v tpe 2.8 v typ power supply voltage short-circuit protection comparator output protection enable terminal waveform output transistor collector waveform pwm comparator output voltage comparator input voltage short-circuit protection dead-time input voltage error amplifier output oscillator triangle waveform 1.6 v 2.0 v 1.4 v 1.25 v FP1451 timing diagram protection enable time, tpe = (0.047 * 10e6 * cpe) in seconds rev0.5 apr . 01, 2004 p1 1/FP1451
technology FP1451 applica t ion note r1 c4 c6 r19 r27 q2 r17 var 1 3 2 r2 r7 jp5 ap9435m 1 2 3 45 6 7 8 l2 r12 c10 c r22 q4 r11 r8 r15 l3 r10 c2 c q1 q3 c3 c d1 scd24 jp1 FP1451 1 2 3 4 5 6 7 89 10 11 12 13 14 15 16 r26 c13 c c14 c1 r16 c15 c11 c5 r25 l1 vin c8 r14 r5 r23 r9 jp2 ap9435m 1 2 3 45 6 7 8 c12 r20 r4 r18 var 1 3 2 d2 scd24 r24 c9 r6 r21 vout2 c7 r13 vout1 c16 c r3 figure 17. 2-channel dc-dc conv erter circuit rev0.5 apr . 01, 2004 p12/FP1451
technology FP1451 p ackage outline sop16 e h d a2 a 0.01 6typ . a1 0. 15x4 5 o 0.00 8typ . vi e w ? view ? l ? o 0.050 typ. 0. 00 4m a x s y m b o l s m i n m a x a 0 . 0 5 3 0 . 0 6 9 a 1 0 . 0 0 4 0 . 0 1 0 d 0 . 3 8 6 0 . 3 9 4 e 0 . 1 5 0 0 . 1 5 7 h 0 . 2 2 8 0 . 2 4 4 l 0 . 0 1 6 0 . 0 5 0 cx 0 8 note: 1.jedec outline:ms-012 ac 2.dimensions ?d? does not include mold flash,protrusions or ga te burrs.mold flash,protrusions and ga te burrs shall not exceed .15mm (.0.06in) per side 3.dimensions ?e? does not include inter-lead flash,or protrusions. 4.inter-lead flash and protrusions shall not exceed .25mm (.0.10in) per side. rev0.5 apr . 01, 2004 p13/FP1451
technology FP1451 pdip16 e1 d e o e b l a2 0.018typ. a1 0.100typ. 0.080typ. a h seating plane s y m b o l s m i n . n o r . m a x . a ? ? 0 . 2 1 0 a 1 0 . 0 1 5 ? ? a 2 0 . 1 2 5 0 . 1 3 0 0 . 1 3 5 d 0 . 7 3 5 0 . 7 5 5 0 . 7 7 5 e 0 . 3 0 0 b s c . e 1 0 . 2 4 5 0 . 2 5 0 0 . 2 5 5 l 0 . 1 1 5 0 . 1 3 0 0 . 1 5 0 e 0 . 3 3 5 0 . 3 5 5 0 . 3 7 5 cx 0 7 1 5 notes: 1.jedec outline: ms-001 bb 2.?d?, ?e1? dimensions do not incl ude mold f a lsh or protrusions. mold flash or protrusions shall not exceed .010 inch. 3.eb is measured a t the lead ti ps with the leads unconstrained. 4.pointed or rounded lead tips are preferred t o ease inser tion. dist ance between leads including dam bar protrusions t o be .005 inch mininum. 5.da tum plane concident with the bo tt om of lead, where lead exits body . rev0.5 apr . 01, 2004 p14/FP1451
technology FP1451 p acking specifica t ions box dimension tube inside box and car t on b ox la bel ftc logo 190 mm 63 0m m inside box 1 00m m b ox la b e l 38 0m m 6 40m m t u be c a rt o n 220 mm ft c logo t ape and reel inside box and car t on ft c l a b e l 3 62m m 3 42m m 50 m m cart o n la b e l ft c l o g o 2 30m m 38 0 m m 36 5 m m ta p e & r e e l c a r t o n p acking quantity specifica t ions 50 ea/tube 2500 ea / reel 50 tubes / inside box 4 inside boxes / car t on 4 inside boxes / car t on label specifica t ions t apping & reel feeling technology corp. product ?g lot no ?g d/c ?g q'ty ???? l1] l e a d f ree FP1451 a3311c62 4xx-xxl ?g rev0.5 apr . 01, 2004 p15/FP1451
technology FP1451 car t on feeling technology corp. product type: lot no: date code: package type: marking type: total q'ty: l 1] lead free FP1451 a3311c62 4xx-xxl sop-16l laser 10,000 carrier t a pe dimensions applica t i o n w p e f d d 1 s o p 1 6 1 6 . 0 0 . 3 8 . 0 0 . 1 1.750.1 7 . 5 0 . 1 1 . 5 5 +0.1 1 . 5 +0.25 applica t i o n p 0 p 1 a 0 b 0 k 0 t s o p 1 6 4 . 0 0 . 1 2 . 0 0 . 1 6.50. 1 1 0 . 3 0 . 1 2 . 1 0 . 1 0 . 3 0 0 . 0 5 rev0.5 apr . 01, 2004 p16/FP1451
technology FP1451 reel dimenisions applica t i o n m a t e r i a l a b c d t 1 t 2 sop16 plastic reel (blue) 3 3 0 3 1 0 0 2 . 0 1 3 . 0 0 . 5 2 . 0 0 . 5 +0 . 3 - 0 . 2 16 . 4 2.50.5 rev0.5 apr . 01, 2004 p17/FP1451

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