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august, 27th 2009 automotive grade AUIPS7121R www.irf.com subject to change w i thout notice 1 current sense high side switch features ? suit able f o r 24v sy st ems over current shut dow n ? ? over t e mperat ure shut d o w n n /off fo r emi s fe t o n ) lly prot ect ed f i ve t e rminal high ? current sensing ? active clamp ? op timize d t u rn o ? re ve rse b a tte ry p r o t e c tio n (mo applications a m p ? 7 5 w f i l a m e n t l ? solenoid ? 24v loads for trucks description i s a f u t he aui p s 7 1 2 1 r side sw it ch s p e c i f ically designed f o r driving lamp. i t f eat ures current sensing, ov er-current , over-t emperat ure, esd prot ect i on and drain t o source act i ve clamp. w hen t he input volt age vcc - vin is higher t han t he specif ied t h reshold, t he out put pow er mosf et is t u rned on. w hen t he vcc - vin is low e r t han t he specif ied vil t h reshold, t he output mosfet is turned off. t he ifb pin is used for current sensing. t he over-current shut dow n is higher t han inrush current of t he lamp. product summary rds(on) 30m ? max . vclamp 65v current shutdown 50a min. packages dpak t y p i c a l c o n n e c t i o n out a u ips7121r in ri f b vcc load ba tte r y i nput po w e r ground ifb logi c ground current f eebac k 10k on off
AUIPS7121R qualification information ? automotive (per aec-q100 ?? ) qualification lev e l comments: this family of ics has passed an automotive qualification. ir?s industrial and consumer qualificat ion level is granted by extension of the higher automotive level. moisture sensitiv ity lev e l dpak-5l msl1, 260c (per ipc/jedec j-std-020) machine model class m2 (200 v) (per aec-q100-003) human body model class h1c (1500 v) ( per aec-q100-002 ) esd charged device model class c5 (1000 v) (per aec-q100-011) ic latch-up test class ii, level a (per aec-q100-004) rohs compliant ye s ? qualification standards can be found at international rectifier?s w eb site h t t p : / / www. i r f . c o m / ?? exceptions to aec-q100 requirements are noted in the qualification report. www.irf.com 2
AUIPS7121R a b s o l u t e m a x i m u m r a t i n g s absolute maximum ratings indicate sustained limits bey ond w h i c h d a m a g e t o t h e d c u r . ( t a m b i e n t = 2 5 c u n l e s s otherw i se specified). a ra m e te r e v i c e m a y o c sy m b o l p min. ma x . units vout maximum output voltage vcc-60 vcc+0.3 v vcc-vin max. maximum vcc voltage -32 60 v iifb, max. maximum feedback current -50 10 ma vcc sc maximum vcc voltage w i th short circuit protection see page 7 v ? 5 0 m a x i m u m p o w er dissipation (internally l i m i t e d p r o t e c t i o n ) b y t h e r m a l pd rth=50c/w dpack 6cm2 footprint ? 2.5 w tj max. max. storage & operating junction temperature -40 150 c thermal characteristics m b o l ma x . units sy p a ra m e te r ty p. rth1 thermal resistance junction to ambient dpak std footprint ? 70 rth2 t i o n t o a m b i e n t d p a k 6 c m 2 f o o t p r i n ? t h e r m a l r e s i s t a n c e j u n c t 5 0 rth3 thermal resistance junction to case dpak ? c/w 2 r e c o m m e n d e d o p e r a t i n g c o n d i t i o n s these values are giv en for a quick design. s min. ma x . units y m bol pa ra m e te r continuous output current, tambient=85c, tj=125c i ? 3.8 a o u t rth=50c/w, dpak 6cm2 footprint rifb ifb resistor 1.5 ? k ? www.irf.com 3
AUIPS7121R s t a t i c e l e c t r i c a l c h a r a c t e r i s t i c s m e te r min. ty p. ma x . units te s t conditions tj=25c, vcc=28v (unless otherw i se specified) sy m bol pa r a vcc op. o p e r a t i n g v o l t a g e r a n g e 6 ? 6 0 v o n s t a t e r e s i s t a n c e t j = 2 5 c ? 24 30 r d s ( o n ) 1 5 0 c ( 2 ) ? 45 55 m ? o n s t a t e r e s i s t a n c e t j = ids=2a icc off supply leakage current ? 2 4 iout off output leakage current ? 2 4 a v i c = 2 8 i f b = v vout=vgnd n = v c v , v g n d i i n o n ma v c c i n = 2 8 v input current w hen device on 1 2.5 4 - v v c l a m p 1 c c t o v o u t c l a m p v o l t a g e 1 id=10ma v 60 64 ? v c l a m p 2 65 72 id=20a see fig. 2 vcc to vout clamp voltage 2 60 vih(1) high level input threshold voltage ? 3.5 5.9 id=10ma vil(1) low l e v e l i n p u t t h r e s h o l d v o l t a g e 1.5 3.2 ? v r d s ( o n ) r e v r t e r e s i s t e v e r s e o n s t a a n c e t j = 2 5 c ? 25 40 m ? i s d = 2 a f . 8 5 o r w ard body diode voltage tj=25c ? 0 . 7 5 0 vf f 7 v i o r w ard body diode voltage tj=125c ? 0 . 6 2 0 . f = 3 a r i n i n 0 ? p u t resistor 1 8 0 2 5 0 3 5 ( 1 ) i n p u t t h r e s h o l d i n a n d t h e t a b . min. ty p. ma x . units o n s a r e m e a s u r e d d i r e ctly betw e e n t h e i n p u t p sw itching electrical characteristics vcc=28v, resistive load=6.8 ? , tj=25c p sy m b o l a ra m e te r te s t c n d i t i o s t d o n t 30 u r n o n d e l a y time 6 15 t r r s i s e t i m e f r o m 2 0 % t o 8 0 % o f v c c 5 10 30 tdoff turn off delay time 25 50 1 0 0 tf fall time from 80% to 20% of vcc 6 15 30 s see fig. 1 protection characteristics tj=25c, vcc=28v (unless otherw i se specified) sy m bol pa ra m e te r min. ty p. ma x . units te s t conditions tsd over temperature threshold(2) 150 165 ? c see fig. 3 and fig. 11 isd over-current shutdow n 50 60 80 a see fig. 3 and page 7 i fault ifb after an over-current or an over- temperature (latched) 2.7 3.3 4 ma see fig. 3 current sensing characteristics tj=25c, vcc=28v (unless other w i se specified), vcc-vifb>4v sy m bol pa ra m e te r min. ty p. ma x . units te s t conditions ratio i load / ifb current ratio 7050 8500 9950 iload=5a ratio_tc i load / ifb variation over temper ature(2) -5% 0 +5 % tj=-40c to +150c i offset load current offset -0.6 0 0.6 a iout<5a ifb leakage ifb leakage current 0 10 100 a iout=0a (2) guaranteed by design www.irf.com 4
AUIPS7121R lead assignments 1- nc 2 - in - vcc 3 4 - ifb t 5 - o u 1 2 4 5 ak v c c d p 3 - f u n c t i o n a all values are ty p l b l o c k d i a g r a m i c a l di a g charge p u m p dri v er ifb o u t vcc 75v 250 ? t j > 165c i o u t > 60a 60v 75v - + 75v in se t re se t lat c h q 1.5m a 3v + - revers e ba tte r y p r ot ec t i on www.irf.com 5
AUIPS7121R truth table op. conditions input output ifb pin voltage normal mode h l 0v normal mode l h i load x rfb / ratio open load h l 0v open load l h ifb leakage x rifb short circuit to gnd h l 0v short circuit to gnd l l i fault x rifb(latched) over temperature h l 0v over temperature l l i fault x rifb (latched) operating voltage maximum vcc v o ltage : this is the maximum voltage before the breakdow n of the ic process. operating v o ltage : this is the vcc range in w h ich the functionalit y of the p a r t i s g u a r a n t e e d . t h e a e c - q 1 0 0 q u a l i f i c a t i o n is run at the maximum operating v o l t a g e s p e c i f i e d i n t h e d a t a s h e e t . r e v e r s e b a t t e r y during the reverse battery the mosfet is turned on if the input pin is pow ered w i th a diode in parallel of the input transistor . pow e r dissipation in the ips : p = rdson rev * i l oad2 + vcc2 / 250 ( internal input resistor ). if the pow er dissipation is too high in rifb, a diode in serial can be added to block the current. active clamp the purpose of the active clamp is to limit the voltage ac ross the mosfet to a value below the body diode break dow n voltage to reduce the amount of stress on the device during sw itching. the temperature increase during active clamp can be estimated as follow s : ) t ( z p clamp th cl tj ? = ? where: ) t ( z clamp th is the thermal impedance at t clamp and can be read from the thermal impedance curves given in the data sheets. clavg cl cl i v p ? = : pow e r dissipation during active clamp 65v v cl = : ty pical v clamp value 2 i i cl clavg = : average current during active clamp dt di i t cl cl = : active clamp duration l v v dt di cl battery ? = : demagnetization current figure 9 gives the maximum inductance vers us the load current in the w o rst case : the part sw itches off after an over temperature detection. if the load inductance exceeds the curve, a free w heeling diode is required. over-current protection the threshold of the over-current protec tion is set in order to guarantee that the device is able to turn on a load w i th an inrush current low e r than the minimum of isd. nevertheles s for high current and high temperature the device may sw itch off for a low e r current due to the over-temperature protection. this behavior is show n in figure 11. www.irf.com 6
AUIPS7121R c u r r e n t s e n s i n g a c c u r a c y i out ifb ifb l eakage ifb2 ifb1 iout1 i offset iout2 the current sensing is specif ied by measuring 3 points : - ifb1 for iout1 - ifb2 for iout2 - i f b l e a k a g e f o r i o u t = 0 the ifb for any iout value using : , the accuracy of the sy stem w ill depends on the variation of ratio_tc specified in page 4. the ioffset variation depends directly on the rdson : i offset@-40c= i offset@25c / 0.8 maximum vcc voltage w i th short circuit protection the maximum vcc voltage w i th short circuit is the maximum vo ltage for w h ich the part is able to protect itself under test conditions representative of the applicati on. 2 kind of short circuits are cons idered : terminal and load short circuit. l sc r sc the parameters in the datasheet are computed w i th the follow i ng formula : ratio = ( iout2 ? iout1 )/( ifb2 ? ifb1) i offset = ifb1 x ratio ? iout1 this allow s the designer to evaluate ifb = ( iout + i offset ) / ratio if ifb > ifb leakage for some applications, a calibration is required. in that case t h e i o f f s e t a n d t h e r a t i o o v e r t h e t e m p e r a t u r e r a n g e . t h e ratio variation is given by i o f f s e t @ 1 5 0 c = i o f f s e t @ 2 5 c / 1 . 9 out ips vcc l sc l s uppl y 5 h r s uppl y 10m ohm terminal sc 0.1 h 10 mohm load sc 10 h 100 mohm r sc www.irf.com 7
AUIPS7121R t j ts d 165c id s vin i shutdow n t s hutdow n vifb v faul t figure 3 ? protection timing diagram vd s id s vcc- vi n v out vcc- vi n 80% 20% 80% 20% t d on tr td o f f tf vc c v d s cl a m p t cl am p s ee a p p l i cat i o n no t es t o eval u a t e p o w er d i ssi p a t i o n c tiv e clamp w a v e forms figure 2 ? a figure 1 ? in rise time & sw itching definitions 0 5 15 25 - 0 100 1 5 0 tj, junction temperature (c) figure 4 ? icc off (a ) vs tj (c) 20 10 icc off, supply leakage current (a) 5 0 50 www.irf.com 8
AUIPS7121R www.irf.com 9 figure 8 ? transient thermal impedance (c/w) vs time (s) ) h , t r a n s i e n t t h e r m a l i m p e d a n c e ( c / w z t ti me (s ) 50% 100% 150% -50 0 50 100 150 200% f i g c ) tj, junction temperature (c) rds(on), drain-to-source on resistance (normalized) u r e 7 - n o r m a l i z ed rds(on) (% ) v s t j ( 1 2 3 4 5 6 vih vil 0 -50 - 25 0 2 5 5 0 7 5 100 125 1 5 0 tj, junction temperature (c) vih and vil (v) figure 6 ? vih and vil (v) vs tj (c) 0 0 1 0 2 03 04 05 0 vcc-vin, supply voltage (v) iccoff, supply current (a) 2 4 0. 01 0. 10 1. 00 10. 00 100. 00 1.e - 05 1. e - 04 1.e - 03 1.e - 02 1. e - 01 1.e + 0 0 1.e + 0 1 1.e+ 0 2 figure 5 ? icc off(a ) vs vcc-vin (v)
AUIPS7121R www.irf.com 10 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 024 68 25 c 150 c 1 10 100 1. e + 01 1.e+ 02 1.e + 03 1.e + 04 ifb, current feedback current (ma) max. output current (a) 1 0 inductance (h) iout, output current (a) f i g h ) u r e 9 ? m a x . i o u t ( a ) v s i n d u c t a n c e ( figure 10 ? ifb (ma ) vs iout (a ) figure 11 ? tsd (s) vs i out (a ) smd w i th 6cm2 t s d , t i m e t o s h u t d o w n ( s ) 0.0 001 0.0 0 1 0. 0 1 0.1 1 10 10 0 0 1 02 0 3 04 0 ' - 40 c ' + 25 c ' + 125 c 5 0 iout, output current (a)
AUIPS7121R www.irf.com 11 c a s e o u t l i n e 5 l e a d ? d p a k
AUIPS7121R t a p e & r e e l 5 l e a d ? d p a k www.irf.com 12
AUIPS7121R part marking information ordering information standard pack base part number package ty pe form quantity complete part number tube 75 AUIPS7121R tape and reel 3000 AUIPS7121Rtr tape and reel left 2000 AUIPS7121Rtrl AUIPS7121R d-pak-5-lead tape and reel right 2000 AUIPS7121Rtrr the information provided in this document is believed to be accurate and reliable. how e ver, international rectifier assumes no responsibility for the consequences of the use of this information. international rectifier assumes no responsibility for any infringement of patents or of other rights of third parties w h ich may result from the use of this information. no license is granted by implication or ot herw i se under any patent or patent rights of international rectifier. the specifications ment ioned in this document are subject to change w i thout notice. this document supersedes and replaces all inform ation previously supplied. for technical support, please contact ir?s technical assistance center h t t p : / / www. i r f . c o m / t e c h n i c a l - i n f o / world hea d qua r ters: 233 kansas st., el segundo, california 90245 tel: (310) 252-7105 www.irf.com 13

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