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automotive ips mosfet driver AUIR3200S 1 rev 1.1 201 6 - 05 - 2 automotive grade mosfet driver with protection and diagnostic features ? boo t strap and charge pump ? o ver temperature shutdown (with p tc interface ) ? short circuit protection (vds detection) ? reverse battery protection (turns on the mosfet) ? ground loss protection ? diagnostic ? es d protection description the auir3200 s is a high side mosfet driver for very low rdson automotive application. it offers over - current, over - temperature protection and diagnostic. the over - current protection is done by monitoring the vds voltage, the thres hold is programmable by external resistor. the over - temperature protection uses a thermal sensor. the au ir 3200 s offers diagnostic on the input pin. product summary operating voltage 6 - 36v vgate 6v package so8 ordering information base part number package type standard pack complete part number form quantity AUIR3200S soic - 8 leads tape and reel 2500 AUIR3200Str
auir32 00s 2 rev 1.1 201 6 - 05 - 02 typical connection cboot load +bat input signal v diag rdiag g s in/dg gnd vcc ptc vds rin rvds ptc sensor AUIR3200S rgate mosfet logic level 100nf
auir32 00s 3 rev 1.1 201 6 - 05 - 02 absolute maximum ratings absolute maximum ratings indicate sustained limits beyond which damage to the device may occur. all voltage parameters are referenced to ground lead. ( tj= - 40c..150c unless otherwise specified). symbol parameter min. max. units vcc - gnd maximum vcc volt age - 0.3 60 v vcc - vds maximum vds pin voltage - 0.3 5.5 vcc - vptc maximum ptc pin voltage - 0.3 5.5 vin - gnd maximum in pin voltage - 0.3 5.5 vcc - vs maximum s pin voltage - 0.3 60 vcboot - vs maximum cboot pin voltage - 0.3 8 vcc cont. maximum continuous vcc voltage ? ? thermal characteristics symbol parameter typ. max. units rth thermal resistance ju nction to ambient 100 ? c/w recommended operating conditions symbol parameter min. max. units vih high level input voltage 2.7 5.5 v vil low level input voltage 0 0.9 rin recommended resistor in series with in pin 10 15 k ? rdiag recommended resist or in series with diag pin 4 15 rvds maximum recommended rvds, see page 7 ? 2.9
auir32 00s 4 rev 1.1 201 6 - 05 - 02 static electrical characteristics tj= - 40 c .. 1 25c, vcc= 6 - 36 v (unless otherwise specified), typical value are given for vcc=14v and tj=25c. symbol parameter min. typ. max. units test conditions vcc op. operating voltage range 6 ? ? ? ? ? 33 50 a vin=5v vgs gate output voltage 5 5.7 7 v igs=0a vgs rev gate output voltage during reverse battery tj= 25c 4.5 5.6 7 igs=50a , vbat= 14 v vin, off input voltage when the part is in fault mode ? 0.25 0.4 idg= 300 a protection characteristics tj= - 40c..1 25c, vcc= 6 - 36 v (unless otherwise specified) , typical value are given for vcc=14v and tj=25c. symbol parameter min. typ. max. units test conditions ivds vds current reference 0.7 0. 8 0.91 ma vcc - vds=0v , tj= - 40c 0. 8 4 0.93 1. 0 5 vcc - vds=0v , tj=25c 1 1.15 1.33 vcc - vds=0v , tj=125c vds offset vds comparator offset - 1 0 0 1 0 mv t blank on vds detection blanking time during turn on 1 5 22 35 s tdiag diagnostic time ? ? ? ? ? ? ? 5.2 5.9 v t uv hold time to keep uv detection active 150 350 600 s p tc _sensor p tc sensor threshold value when over temperature 1 .3 5 14.3 k ?
auir32 00s 5 rev 1.1 201 6 - 05 - 02 switching characteristics tj= - 40..125c, vcc=6.. 3 6v (unless otherwise specified), typical value are given for vcc=14v and tj=25c. symbol parameter min. typ. max. units test conditions t don turn - on delay to 20% of vgs ? ? ? ? ? ? 2 ? t f fall time from 80% to 20% of v g s ? 1 ? igs + gate output high pulsed current 100 160 ? ? ? ? true table operating conditions in out dg normal on h h h normal off l l l short circuit to gnd h l l short circuit to gnd l l l over - temperature h l l over - temperature l l l
auir32 00s 6 rev 1.1 201 6 - 05 - 02 lead assignments functional block diagram all values are typ ical + - 75v boot strap regulator 11v 6v 6v 6v 1ma level shifter + - vcc - 6v vcc - 6v vptc= vcc - 2v uv 4 clk counter t blanking on rptc in/dg vcc 150k ? charge pump 2v 1.7v 6 v gnd 75v ptc vd s g s cboot s r q q diagnostic sleep mode 100 ? 10k ? driver
auir32 00s 7 rev 1.1 201 6 - 05 - 02 over - current protection the over - current protection is done by monitoring the vds voltage of the mosfet. the threshold is adjusted by connecting the appropriate resistor between vcc and vds pin => rvds . b elow the for mula to set the appropriate over - current threshold: we advise to you to take low tolerance resistor for rvds for optimize the precision of your current level protection . the AUIR3200S doesnt have feedback of the mosfet temper ature. we take in the consideration that tcase of AUIR3200S will be almost the same like the tcase of mosfet. t he current ivds has a positive temperature coefficient to compensate the positive temperature coefficient of the rdson of the mosfet. the above f ormula is only valid when the mosfet is fully on. therefore d uring the turn on of the mosfet , the time tblank on disables the vds protection until the m osfet is f ully on. therefore a maximum resistor is specified for rvds in the recommended section. with a higher resistor, the part will latch. figure 1 : protection vds t vin (v) iout (a) vds (v) over - current shutdown vdiag (v) vds > vrvds v rvds (v) 0 0 0 0 t t t vds threshold _ ivds rvds isd threshold rdson ? ?
auir32 00s 8 rev 1.1 201 6 - 05 - 02 over - temperature protection the temperature protection uses a ptc sensor connected to the tab or the drain of the mosfet depending on the mounting. this sensor will increase with the temperature. when his value is above 5k? (typical value) the protection will be activated. vptc > 2v when the rptc > 5 k?: figure 2 : protection ptc for optimize the precision of the protection it is important to maximize the thermal interface between the sensor and the junction. the ptc sensor needs to be place d the closest possible of the mosfet and to be surrounded by copper. the connection with AUIR3200S could be doing by a trace in bottom side of the pcb. figure 3 : layout example (top side) vin (v) iout (a) tj (c) over - temperature shut down vdiag (v) vcc - vptc (v) 2v (typ.) t t t t 0 0 0 0 0 t mosfet ptc sensor copper plan
auir32 00s 9 rev 1.1 201 6 - 05 - 02 the ptc protection could be activated if ptc sensor is higher than 1.3k? (see page 4 : ptc sensor characteristic ). figure 4 : typical ptc curve (rptc vs temperature) in this area the ptc protection could be activated ptc sensor<1.3k ? : no activation possible of ptc protection
auir32 00s 10 rev 1.1 201 6 - 05 - 02 protection evaluation the ptc sensor, the vds threshold and the mosfet must be chosen in order to not exceed th e maximum junction temperature of the mosfet during a short circuit. protection is evaluated by switching the mosfet on different currents and by evaluating the junction temperature when the mosfet is switched off by the protections. this evaluation give s the following drawing. - for high impedance short circuit, vds is smaller than vds threshold, so the over - temperature will act. - for low impedance short circuit, the vds protection will switch off the mosfet. at the transition current between the 2 protect ions the junction temperature of the mosfet is the maximum and should be lower than the maximum rating. figure 5 : p rotection evaluation maximum tj of your system. need to be lower than tj max of the mosfet. junction temperature at switch off short - circuit current over - temperature pr otection over - current protection
auir32 00s 11 rev 1.1 201 6 - 05 - 02 sleep_mode / diagnostic sleep_mode block manages the diagnostic and the sleep_ mode. the device enters in sleep mode if input is inactive during a delay higher than tsleep. figure 6 wake up sequence to wake up the part from the sleep mode, the input must be activated at least during twkp, then the boo t str ap regulator is switched on and the boo t strap capacitor is charged. the output will not be activated during tpw on rst. figure 7 fig ure 8 in diag internal diag out tdiag tdiag sleep mode fault mode normal mode treset tsleep in out sleep mode normal mode t pw on rst t wkp t sleep sleep mode in out sleep mode normal mode tpw on rst twkp
auir32 00s 12 rev 1.1 201 6 - 05 - 02 bootstrap the bootstrap capacitor provides the necessary curr ent to the driver in order to charge the gate mosfet capacitor to the right voltage level. a design rule to select the bootstrap capacitor value is to choose 10 times the gate capacitance. you can find in the m osfet datasheet qg max for a specific vgs. b elow the formula to set the appropriate cboot value : the AUIR3200S integrates a bootstrap regulator to maintain a fixed voltage (vboot=6v) on the bootstrap capacitor for any battery voltage. the regulator is off during the sle ep mode to reduce the current consumption. the power on reset is necessary to charge the bootstrap capacitor before turns on the power mosfet. the bootstrap capacitor gets its charge through the load. so the time to charge it depends of the load. but th e power on reset doesnt monitor the bootstrap capacitor voltage. its time is set internally to allow starting the most of load witho ut implement a special sequence: t he power on reset is long enough to charge the bootstrap capacitor before turns on the po wer mosfet. figure 9 figure 1 0 charged v in v g power on reset time time to charge the bootstrap capacitor charged v in v gs power on reset time time to charge the bootstrap capacitor v boot max 10 qg cboot vgs ?? cboot vcc out 6 .6 v load iboot vboot
auir32 00s 13 rev 1.1 201 6 - 05 - 02 if the inductance of the load is too important , the power on reset is not enough long to charge completely the bootstrap capaci tor before turns on the power mosfet. so the micro - processor need to implement a special sequence to start the device without activates the output power mosfet. the micro - processor send one short pulse (twk p max < short pulse < tpwr_on_rst min ) then wait for the bootstrap capacitor is totally charged and after provide the appropriate duty cycle. the bootstrap charge depends of the battery voltage, the bootstrap capacitor value and the inductance load value . figure 1 1 charged v boot v in v g power on reset time time to charge the bootstrap capacitor charged v v in v gs power on reset time time to charge the bootstrap capacitor t wak e min
auir32 00s 14 rev 1.1 201 6 - 05 - 02 in frequency and duty cycle the vds protection is not active if the time on is lower tha n tblank on. so t he minimum time on (ton) is tblank on max to be sure that th is protection will be active . the times off (toff) needs to be setup for assure that the capacitor bootstrap will be recharge d up to 6v. the bootstrap time charge depends of the bootstrap capacitor value and the inductance load value. figure 1 2 if the capacitor is discharged at the turn on of the mosfet , the auir3200 s will detect a fault (vds protection) after tblank on because the mosfet wont be fully on. figure 1 3 vds threshold ton toff in vboot vdiag normal mode 0v vds mosfet 0v 6v tblank on tblank on in vboot vdiag fault mode normal mode 0v vds mosfet 0v v ds threshold vds > vds threshold
auir32 00s 15 rev 1.1 201 6 - 05 - 02 under voltage protection in short - circuit mode during short circuit condition, it may happen that the supply voltage drop s below the unde r voltage before the short is detected by the vds protection due to the blanking time tblank on. in under voltage condition the AUIR3200S turn s off the m osfet . the time tblank on is reset. figure 1 4 in order to detect the short circuit c ondition, the AUIR3200S has a counter and after 4 under voltage detections, the part is latch ed and the fault diagnostic is activated . the counter is reset when the part goes to sleep mode. figure 1 5 in vcc uv 0v vds mosfet 0v tblank o n t uv hold tblank o n in vcc vdiag sleep mode fault mode normal mode uv 0v v ds mosfet 0v
auir32 00s 16 rev 1.1 201 6 - 05 - 02 pwm operation ( tonAUIR3200S integrates a counter which is incremented by the input signal and reset when the vds voltage is below the vds threshold. the counter latches off the AUIR3200S after 4 activations . during pwm operation ( ton< tblank on) on a short circuit, the vds is always above the vds threshold and 4 activations on the input will latch the AUIR3200S and the fault diagnostic is activated. figure 1 6 in vdiag fault mode normal mode vds th v ds mosfet 0v 1 2 3 4 auir32 00s 17 rev 1.1 201 6 - 05 - 02 tj, junction temperature (c) figure 1 7 : icc off (a) vs tj (c) (vcc=1 4v,vin=0v) icc off, supply leakage current (a) tj, junction temperature (c) vih and vil (v) f igure 18 : vih and vil (v) vs tj (c) vcc, operating voltage (v) vgs, output gate voltage (v) f igure 19 : vgs vs vcc with ivgs=50a parameters curves : typical value 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 -40 10 60 110 0 1 2 3 4 5 6 7 0 10 20 30 0.0 0.5 1.0 1.5 2.0 2.5 -40 -20 0 20 40 60 80 100 120 140 vih vil
auir32 00s 18 rev 1.1 201 6 - 05 - 02 case outline C so8
auir32 00s 19 rev 1.1 201 6 - 05 - 02 tape & reel so8
auir32 00s 20 rev 1.1 201 6 - 05 - 02 part marking information 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 8n msl 2 260c (per ipc/jedec j - std - 020) esd machine model class m1b(+/ - 100v) (per aec - q100 - 003 ) human body model class h1c (+/ - 1500v) ( per aec - q100 - 002 ) charged device model class c4 (+/ - 1000v) (per aec - q100 - 011 ) ic latch - up test class i i , level a (per aec - q100 - 004 ) rohs compliant yes ? qualification standards can be found at international rectifiers web site http://www.irf.com/
auir32 00s 21 rev 1.1 201 6 - 05 - 02 published by i nfineon technologies ag 81726 mnchen, germany ? infineon technologies ag 2015 all rights reserved. important notice the information given in this document shall in no event be regarded as a guarantee of conditions or characteristics (beschaffenheitsga rantie). with respect to any examples, hints or any typical values stated herein and/or any information regarding the application of the product , infineon technologies hereby disclaims any and all warranties and liabilities of any kind, including without limitation warranties of non - infringement of intellectual property rights of any third party. in addition , any information given in this document is subject to customer s compliance with its obligations stated in this document and any applicable legal re quirements, norms and standards concerning customers products and any use of the product of infineon technologies in customers applications. the data contained in this document is exclusively intended for technically trained staff. it is the responsibi lity of customers technical departments to evaluate the suitability of the product for the intended application and the completeness of the product information given in this document with respect to such application. for further information on the prod uct, technology, delivery terms and conditions and prices please contact your nearest infineon technologies o ffice ( www.infineon.com ). warnings due to technical requirements products may contain dangerous substan ces. for information on the types in question please contact your nearest infineon technologies o ffice. except as otherwise explicitly approved by infineon technologies in a written document signed by authorized representatives of infineon technologies, i nfineon technologies products may not be used in any applications where a failure of the product or any consequences of the use thereof can reasonably be expected to result in personal injury.
auir32 00s 22 rev 1.1 201 6 - 05 - 02 revision history revision date notes/changes a november, 2 nd 2012 initial release b january, 3 rd 2013 add max rvds d april , 24 th 2015 add rptc sensor parameter add explanation for current protection and t emperature protection e 1 june, 3 th 2015 add vgs max and vgs rev max e3 september, 24 th 2015 ifx te mplate e4 october, 2 2015 twkp max added 1.1 may 02, 2016 ground loss protection update revision name

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