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n ovember , 1 4 th 2011 automotive grade auips7145 1g www.irf.com 1 current sense high side switch features suitable for 24v systems over current shutdown over temperature shutdown current sensing active clamp reverse circulation immunization low quiescent current esd protection optimized turn on/off for emi lead - free, halogen - free, rohs c ompliant automotive qualified application s solenoid 24v loads for trucks description the auips7145 1g is a fully protected four terminal high side switch specifically designed for driving lamp. it features current sensing, over - current, over - temperature, esd protection and drain to source active c lamp. the ifb pin is used for current sensing. product summary rds(on) 100m max. vclamp 65v current shutdown 4 a min. packages so8 typical connection out ips in 2.5k vcc load battery input power ground ifb logic ground current feeback 10k on off
auips7145 1g www.irf.com 2 qualification information ? qualification level automotive (per aec - q100 ?? ) comments: this family of ics has passed an automotive qualification. irs industrial and consumer qualification level is granted by extension of the higher automotive level. moisture sensitivity level soic - 8l msl2, 260c (per ipc/jedec j - std - 020 ) esd machine model class m 2 (200 v) (per aec - q100 - 003) human body model class h1c (1500 v) ( per aec - q100 - 002 ) charged device model class c5 (1000 v) (per aec - q100 - 011) ic latch - up test classii, level a (per aec - q100 - 004) rohs compliant yes ? qualification standards can be found at international rectifiers web site http://www.irf.com/ ?? exceptions to aec - q100 requireme nts are noted in the qualification report.
auips7145 1g www.irf.com 3 absolute maximum ratings absolute maximum ratings indicate sustained limits beyond which damage to the device may occur. (tj= - 40c..150c, vcc= 6 ..50v unless otherwise specified). symbol parameter min. max. unit s vout maximum output voltage vcc - 60 vcc+0.3 v i rev maximum reverse pulsed current (t=100s) see page 8 30 a isd cont. maximum diode continuous current tambient=25c , rth=70c/w 2.3 vcc - vin max. maximum vcc voltage - 16 60 v iifb, max. maximum f eedback current - 50 10 ma vcc sc. maximum vcc voltage with short circuit protecti on see page 8 50 v pd maximum power dissipation (internally limited by thermal protection) w rth= 10 0c/w 1 . 2 5 tj max. max. storage & operating junction temperatu re - 40 150 c thermal characteristics symbol parameter typ. max. units rth1 thermal resistance junction to ambient so8 100 c/w recommended operating conditions these values are given for a quick design. symbol parameter min. max. units iout cont inuous output current, tambient=85c, tj=125c a rth=100c/w 1.5 rifb ifb resistor 1.5 k
auips7145 1g www.irf.com 4 static electrical characteristics tj= - 40c..150 c, vcc= 6 - 50v (unless otherwise specified) . typical value are given for 28v and 25c. symbol parameter min. typ. max. units test conditions vcc op. operating voltage 6 60 v rds(on) on state resistance tj=25c 75 100 m ids= 2 a on state resistance tj=150c(2) 135 180 icc off supply leakage current 1 3 a vin=vcc / vifb=vgnd vout=vgnd , tj=25c iout off output leakage current 1 3 i in on input current while on 0.6 2 4 ma vcc - vin=28v , tj=25c v clamp1 vcc to vout clamp voltage 1 60 64 v id= 10 ma v clamp2 vcc to vout clamp voltage 2 60 65 72 id= 6a see fig. 2 vih(1) high level input threshold voltage 3 5 id= 10 ma vil(1) low leve l input threshold voltage 1.5 2.3 vf forward body diode voltage tj=25c 0.8 0.9 if=1a forward body diode voltage tj=125c 0.65 0.75 (1) input thresholds are measured directly between the input pin and the tab. switching electrical characteri stics vcc=28v, resistive load=27 , tj=25c symbol parameter min. typ. max. units test conditions tdon turn on delay time to 20% 4 10 20 s see fig. 1 tr rise time from 20% to 80% of vcc 2 5 10 tdoff turn off delay time 20 40 80 s tf fall time from 80% to 20% of vcc 2.5 5 10 protection characteristics tj= - 40c..150c, vcc=6 - 50v (unless otherwise specified) symbol parameter min. typ. max. units test conditions tsd over temperature threshold 150(2) 165 c see fig. 3 and fig.11 isd over - curren t shutdown 4 7 10 a see fig. 3 and page 7 i fault ifb after an over - current or an over - temperature (latched) 2.2 3 5 ma see fig. 3 current sensing characteristics tj= - 40c..150c, vcc=6 - 50v (unless otherwise specified). specified 500s after the turn on . vcc - vifb>4v . typical value are given for 28v and 25c. symbol parameter min. typ. max. units test conditions ratio i load / ifb current ratio 2000 2400 2800 i out< 4 a ratio_tc i load / ifb variation over temperature(2) - 5% 0 +5 % tj= - 40c to +150c i offset load current offset - 0. 0 2 0 0. 0 2 a io ut <4 a ifb leakage ifb leakage current on in open load 0 1 10 a iout=0a , vcc - vin=28v (2) guaranteed by design
auips7145 1g www.irf.com 5 lead assignments functional block diagram all values are typical diag charge pump driver ifb out vcc 75v 100 tj > 165c iout > 7a 60v 75v - + 75v in set reset latch q 1.5ma + - 3v
auips7145 1g www.irf.com 6 truth table op. condi tions 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 0v short circuit to gnd h l 0v short circuit to gnd l l v fault (latched) over temperature h l 0v over temperature l l v faul t (latched) operating voltage maximum vcc voltage : this is the maximum voltage before the breakdown of the ic process. operating voltage : this is the vcc range in which the functionality of the part is guaranteed. the aec - q100 qualification is run at t he maximum operating voltage specified in the datasheet. reverse battery during the reverse battery the mosfet is kept off and the load current is flowing into the body diode of the power mosfet. power dissipation in the ips : p = i load * vf there is no protection, so tj must be lower than 150c in the worst case condition of current and ambient temperature. if the power dissipation is too high in rifb, a diode in serial can be added to block the current. the transistor used to pull - down the input should be a bipolar in order to block the reverse current. the 100ohm input resistor can not sustain continuously 16v (see vcc - vin max. in the absolute maximum ratings section) active clamp the purpose of the active clamp is to limit the voltage across the mosf et to a value below the body diode break down voltage to reduce the amount of stress on the device during switching. the temperature increase during active clamp can be estimated as follows: where: is the the rmal impedance at t clamp and can be read from the thermal impedance curves given in the data sheets. : power dissipation during active clamp : typical v clamp value. : average current duri ng active clamp : active clamp duration : demagnetization current figure 9 gives the maximum inductance versus the load current in the worst case : the part switches off after an over temperature detection. if the load inductance exceeds the curve, a free wheeling diode is required. ) t ( z p clamp th cl tj ) t ( z clamp th clavg cl cl i v p 65v v cl 2 i i cl clavg dt di i t cl cl l v v dt di cl battery
auips7145 1g www.irf.com 7 over - current protection the threshold of the over - current protection is set in order to guarantee that the device is able to turn on a load with an inrush current lower than the m inimum of isd. nevertheless for high current and high temperature the device may switch off for a lower current due to the over - temperature protection. this behavior is shown in figure 11. current sensing accuracy the current se nsing is specified by measuring 3 points : - ifb1 for iout1 - ifb2 for iout2 - ifb leakage for iout=0 the parameters in the datasheet are computed with the following formula : ratio = ( iout2 C iout1 )/( ifb2 C ifb1) i offset = ifb1 x ratio C iout1 this a llows the designer to evaluate the ifb for any iout value using : ifb = ( iout + i offset ) / ratio if ifb > ifb leakage for some applications, a calibration is required. in that case, the accuracy of the system will depends on the variation of the i offse t and the ratio over the temperature range. the ratio variation is given by ratio_tc specified in page 4. the ioffset variation depends directly on the rdson : i offset@ - 40c= i offset@25c / 0.8 i offset@150c= i offset@25c / 1.9 iout ifb ifb leakage ifb2 ifb1 iout2 iout1 i offset
auips7145 1g www.irf.com 8 maximum vcc voltage wi th short circuit protection the maximum vcc voltage with short circuit is the maximum voltage for which the part is able to protect itself under test conditions representative of the application. 2 kind of short circuits are considered : terminal and load short circuit. maximum current during reverse circulation in case of short circuit to battery, a voltage drop of the vcc may create a current which circulate in reverse mode. when the device is on, this reverse circulation current will not trigger the internal fault latch. this immunization is also true when the part turns on while a reverse current flows into the device. the maximum current (i rev) is specified in the maximum rating section. l sc r sc terminal sc 0.1 h 10 mohm load sc 10 h 100 mohm out ips vcc l sc l supply 5h r supply 10mohm r sc
auips7145 1g www.irf.com 9 figure 3 C protection timing diagram figure 1 C in rise time & s witching definitions figure 2 C active clamp waveforms tj, junction temperature (c) figure 4 C icc off (a) vs tj (c) icc off, supply leakage current (a) tj tsd 165c ids vin i shutdown tshutdown vifb v fault vds ids vcc - vin vcc vds clamp t clamp see application notes to evaluate power dissipation 0 2 4 6 8 10 -50 0 50 100 150 vout vcc - vin 80% 20% 80% 20% td on tr td off tf
auips7145 1g www.irf.com 10 figure 8 C transient thermal im pedance (c/w) vs time (s) zth, transient thermal impedance (c/w) time (s) rds(on), drain - to - source on resistance (normalized) figure 7 - normalized rds(on) (%) vs tj (c) tj, junction temperature (c) tj, junction temperature (c) vih and vil (v) figure 6 C vih and vil (v) vs tj (c) figure 5 C icc off (a) vs vcc - vout (v) vcc - vout, supply voltage (v) icc, supply current (a) 50% 100% 150% 200% -50 0 50 100 150 0 1 2 3 4 -50 -25 0 25 50 75 100 125 150 vih vil 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 0 5 10 15 0 10 20 30 40 50 60
auips7145 1g www.irf.com 11 figure 9 C max. iout (a) vs inductance (h) i nductance (h) max. output current (a) figure 10 C ifb (ma) vs iout (a) iout, output current (a) ifb, current feedback current (ma) figure 11 C tsd (s) vs i out (a) smd with 6cm2 iout, output current (a) tsd, time to shutdown(s) 1 10 100 1.e+01 1.e+02 1.e+03 1.e+04 1.e+05 0.0 1.0 2.0 3.0 4.0 5.0 6.0 0 2 4 6 8 10 12 14 25c 150c -40c 0.0001 0.001 0.01 0.1 1 10 100 0 5 10 15 20 '-40c '+25c '+125c
auips7145 1g www.irf.com 12 case outline - so - 8
auips7145 1g www.irf.com 13 tape & reel - so - 8
auips7145 1g www.irf.com 14 part marking information ordering information base part number package type standard pack complete part number form quantity AUIPS71451G so8 tube 95 AUIPS71451G tape and reel 2500 AUIPS71451Gtr
auips7145 1g www.irf.com 15 important notice unless specifically designated for the automotive market, international rectifier corporation and its subsidiarie s (ir) 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 services without notice. part numbers designated with the au prefix foll ow automotive industry and / or customer specific requirements with regards to product discontinuance and process change notification. all products are sold subject to irs terms and conditions of sale supplied at the time of order acknowledgment. ir warr ants performance of its hardware products to the specifications applicable at the time of sale in accordance with irs standard warranty. testing and other quality control techniques are used to the extent ir deems necessary to support this warranty. exce pt where mandated by government requirements, testing of all parameters of each product is not necessarily performed. ir assumes no liability for applications assistance or customer product design. customers are responsible for their products and applic ations using ir components. to minimize the risks with customer products and applications, customers should provide adequate design and operating safeguards. reproduction of ir information in ir data books or data sheets is permissible only if reproductio n is without alteration and is accompanied by all associated warranties, conditions, limitations, and notices. reproduction of this information with alterations is an unfair and deceptive business practice. ir is not responsible or liable for such altere d documentation. information of third parties may be subject to additional restrictions. resale of ir products or serviced with statements different from or beyond the parameters stated by ir for that product or service voids all express and any implied warranties for the associated ir product or service and is an unfair and deceptive business practice. ir is not responsible or liable for any such statements. ir products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or in other applications intended to support or sustain life, or in any other application in which the failure of t he ir product could create a situation where personal injury or death may occur. should buyer purchase or use ir products for any such unintended or unauthorized application, buyer shall indemnify and hold international rectifier and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses , and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that ir was negligent regarding the design or manufacture of the pr oduct. only products certified as military grade by the defense logistics agency (dla) of the us department of defense, are designed and manufactured to meet dla military specifications required by certain military, aerospace or other applications. buyers acknowledge and agree that any use of ir products not certified by dla as military - grade, in applications requiring military grade products, is solely at the buyers own risk and that they are solely responsible for compliance with all legal and regulator y requirements in connection with such use. ir products are neither designed nor intended for use in automotive applications or environments unless the specific ir products are designated by ir as compliant with iso/ts 16949 requirements and bear a part n umber including the designation au. buyers acknowledge and agree that, if they use any non - designated products in automotive applications, ir will not be responsible for any failure to meet such requirements. for technical support, please contact irs technical assistance center world headquarters: 101 n. sepulveda blvd., el segu ndo, california 90245 tel: (310) 252 - 7105

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