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www.irf.com ? 2008 international rectifier 1 irs20957s protected digital audio driver features ? floating pwm input enables easy half bridge implementation ? programmable bidirectional over-current protection with self-reset function ? programmable preset dead-time for improved thd performances ? high noise immunity ? 100v ratings deliver up to 500w in output power ? 3.3 v/ 5 v logic compatible input ? operates up to 800khz typical applications ? home theatre systems ? mini component stereo systems ? powered speaker systems ? general purpose audio power amplifiers product summary topology half-bridge v offset (max) +/- 100 v i o+ & i o- (typical) 1.0 a & 1.2 a selectable deadtime 15/25/35/80ns ton & toff (typical) 95ns & 80ns oc protection delay 500ns (max) shutdown propagation delay 250ns (max) package typical connection diagram note: please refer to lead assignments for co rrect pin configuration. this diagram shows electrical connections only. march 5, 2009 datasheet no ? pd97381
irs20957s www.irf.com ? 2008 international rectifier 2 table of contents page description 3 qualification information 4 absolute maximum ratings 5 recommended operating conditions 6 electrical characteristics 7 functional block diagram 9 input/output pin equivalent circuit diagram 10 lead definitions 11 lead assignments 11 waveform definitions 12 application information and additional information 12 package details 13 tape and reel details 14 part marking information 15 ordering information 16
irs20957s www.irf.com ? 2008 international rectifier 3 description the irs20957s is a high voltage, high speed mosfet dr iver with a floating pwm input designed for class d audio amplifier applications. bi-directional current sensing detects over curr ent conditions during posit ive and negative load currents without any external shunt resistors. a built-in prot ection control block provides a secure protection sequence against over-current conditions and a programmable reset timer. the internal dead-time generation block enables accu rate gate switching and optimum dead-time setting for better audio performance, such as lower thd and lower audio noise floor.
irs20957s www.irf.com ? 2008 international rectifier 4 qualification information ? industrial ?? qualification level comments: this family of ics has passed jedec?s industrial qualification. ir?s consumer qualification level is granted by extension of the higher industrial level. moisture sensitivity level soic16n msl2 ??? 260c (per ipc/jedec j-std-020) machine model class b (per jedec standard eia/jesd22-a115) esd human body model class 2 (per eia/jedec standard jesd22-a114) ic latch-up test class i , level a (per jesd78) rohs compliant yes ? qualification standards can be found at international rectifier?s web site http://www.irf.com/ ?? higher qualification ratings may be available sh ould the user have such requirements. please contact your international rectifier sale s representative for further information. ??? higher msl ratings may be available for the specif ic package types listed here. please contact your international rectifier sales re presentative for further information.
irs20957s www.irf.com ? 2008 international rectifier 5 absolute maximum ratings absolute maximum ratings indicate sustained limit s beyond which damage to the device may occur. all voltage parameters are absolute voltages referenced to v ss ; all currents are defined positive into any lead. the thermal resistance and power dissipation rati ngs are measured under board mounted and still air conditions. symbol definition min. max. units v b high side floating supply voltage -0.3 215 v s high side floating supply voltage ? v b -15 v b +0.3 v ho high side floating output voltage vs-0.3 v b +0.3 v csh csh pin input voltage vs-0.3 v b +0.3 v cc low side fixed supply voltage ? -0.3 20 v lo low side output voltage -0.3 v cc +0.3 v dd floating input supply voltage -0.3 210 v ss floating input supply voltage ? (see i ddz ) v dd +0.3 v in pwm input voltage v ss -0.3 v dd +0.3 v csd csd pin input voltage v ss -0.3 v dd +0.3 v dt dt pin input voltage -0.3 v cc +0.3 v ocset ocset pin input voltage -0.3 v cc +0.3 v ref vref pin voltage -0.3 v cc +0.3 v i ddz floating input supply zener clamp current ? - 10 i ccz low side supply zener clamp current ? - 10 i bsz floating supply zener clamp current ? - 10 i oref reference output current - 5 ma d v s /dt allowable v s voltage slew rate - 50 d v ss /dt allowable v ss voltage slew rate ?? - 50 v/ns d v ss /dt allowable v ss voltage slew rate upon power-up ??? - 50 v/ms pd maximum power dissipation - 1.0 w rth ja thermal resistance, junction to ambient - 115 c/w t j junction temperature - 150 t s storage temperature -55 150 t l lead temperature (soldering, 10 seconds) - 300 c ? v dd - v ss , v cc -com and v b - v s contain internal shunt zene r diodes. please note that the voltage ratings of these can be limited by the clamping current. ?? for the rising and falling edges of step signal of 10v. vss=15v to 200v. ??? vss ramps up from 0v to 200v.
irs20957s www.irf.com ? 2008 international rectifier 6 recommended operating conditions for proper operation, the device should be used wi thin the recommended conditions below. the vs and com offset ratings are tested with supplies biased at i dd =5ma, v cc =12v and v b -v s =12v. symbol definition min. max. units v b high side floating supply absolute voltage vs+10 vs+14 v s high side floating supply offset voltage ? 200 v i ddz floating input supply zener clamp current 1 5 ma v ss floating input supply absolute voltage 0 100 v ho high side floating output voltage vs v b v cc low side fixed supply voltage 10 15 v lo low side output voltage 0 v cc v in pwm input voltage v ss v dd v csd csd pin input voltage v ss v dd v dt dt pin input voltage 0 v cc v i oref reference output current to com ? 0.3 0.8 ma v ocset ocset pin input voltage 0.5 5 v t a ambient temperature -40 125 c ? logic operational for vs equal to ?5v to +200v. logic state held for vs equal to ?5v to ?v bs . ?? nominal voltage for v ref is 5v. i oref of 0.3 ? 0.8ma dictates total external resistor value on vref to be 6.3k to 16.7k ? .
irs20957s www.irf.com ? 2008 international rectifier 7 electrical characteristics v cc ,v bs = 12 v, i dd =5ma, v ss =20v, v s =0v,c l =1nf and t a =25 c unless otherwise specified. symbol description min typ max units test conditions low side supply uv cc+ v cc supply uvlo positive threshold 8.4 8.9 9.4 uv cc- v cc supply uvlo negative threshold 8.2 8.7 9.2 v i qcc low side quiescent current - - 3 ma v dt = v cc v clampl low side zener diode clamp voltage 19.6 20.4 21.6 v i cc =5ma high side floating supply uv bs+ high side well uvlo positive threshold 8.0 8.5 9.0 uv bs- high side well uvlo negative threshold 7.8 8.3 8.8 v i qbs high side quiescent current - - 1 ma i lkh high to low side leakage current - - 50 a v b =v s =200v v clamph high side zener diode clamp voltage 14.7 15.3 16.2 v i bs =5ma floating input supply uv dd+ v dd , v ss floating supply uvlo positive threshold 8.2 8.7 9.2 v ss =0v uv dd- v dd , v ss floating supply uvlo negative threshold 7.7 8.2 8.7 v v ss =0v i qdd floating input quiescent current - - 1 ma v dd =9.5v +vss v clampm floating input zener diode clamp voltage 9.8 10.2 10.8 v i dd =5ma i lkm floating input side to low side leakage current - - 50 a v dd =v ss =200v floating pwm input v ih logic high input threshold voltage 2.3 1.9 - v il logic low input threshold voltage - 1.9 1.5 v i in+ logic ?1? input bias current - - 40 v in =3.3v i in- logic ?0? input bias current - - 1 a v in = v ss protection v ref reference output voltage 4.8 5.1 5.4 i oref =0.5ma vth ocl low side oc threshold in vs 1.1 1.2 1.3 ocset=1.2v, figure 3 vth och high side oc threshold in v csh 1.1+ vs 1.2+ vs 1.3+ vs vs=200v, figure 4 vth1 csd pin shutdown release threshold 0.62xv dd 0.70xv dd 0.78xv dd v ss =0v vth2 csd pin self reset threshold 0.26xv dd 0.30xv dd 0.34xv dd v v ss =0v i csd+ csd pin discharge current 70 100 130 v sd = v ss +5v i csd- csd pin charge current 70 100 130 a v sd = v ss +5v
irs20957s www.irf.com ? 2008 international rectifier 8 protection (continued) symbol description min typ max units test conditions t sd shutdown propagation delay from v csd > v ss + vth och to shutdown - - 250 figure 2 t och propagation delay time from v csh > vth och to shutdown - - 500 figure 4 t ocl propagation delay time from vs> vth ocl to shutdown - - 500 ns figure 3 gate driver io+ output high short circuit current (source) - 1.0 - vo=0v, pw< 10s io- output low short circuit current (sink) - 1.2 - a vo=12v, pw< 10s v ol low level out put voltage lo ? com, ho ? vs - - 0.1 io=0a v oh high level out put voltage vcc ? lo, vb ? ho - - 1.4 v io=0a tr turn-on rise time - 15 - tf turn-off fall time - 10 - ton_1 high and low side turn-on propagation delay, floating inputs - 95 - v dt = v cc, v s = 100v, v ss = 100v toff_1 high and low side turn-off propagation delay, floating inputs - 80 - v dt = v cc, v s = 100v, v ss = 100v ton_2 high and low side turn-on propagation delay, non- floating inputs - 95 - v dt = v cc, v s = 100v, v ss = com toff_2 high and low side turn-off propagation delay, non- floating inputs - 80 - v dt = v cc, v s = 100v, v ss = com dt1 deadtime: lo turn-off to ho turn-on (dt lo-ho ) & ho turn- off to lo turn-on (dt ho-lo ) 8 15 22 v dt >v dt1, v ss = com dt2 deadtime: lo turn-off to ho turn-on (dt lo-ho ) & ho turn- off to lo turn-on (dt ho-lo ) 15 25 35 v dt1 >v dt > v dt2, v ss = com dt3 deadtime: lo turn-off to ho turn-on (dt lo-ho ) & ho turn- off to lo turn-on (dt ho-lo ) 20 35 50 v dt2 >v dt > v dt3, v ss = com dt4 deadtime: lo turn-off to ho turn-on (dt lo-ho ) & ho turn- off to lo turn-on (dt ho- lo )v dt = v dt4 50 80 110 ns v dt3 >v dt, v ss = com v dt1 dt mode select threshold 1 0.51xvcc 0.57xvcc 0.63xvcc v dt2 dt mode select threshold 2 0.32xvcc 0.36xvcc 0.40xvcc v dt3 dt mode select threshold 3 0.21xvcc 0.23xvcc 0.25xvcc v
irs20957s www.irf.com ? 2008 international rectifier 9 functional block diagram high side cs vb ho vs in low side cs csd uv q uv detect dead-time vcc lo com vdd vss csh protection control sd ocset uv detect uv detect charge/ discharge hv level shift hv level shift hv level shift floating input floating high side hv level shift hv level shift 5v reg dt dt input logic 10.2v 15.3v 20.4v vref 5.1v reference
irs20957s www.irf.com ? 2008 international rectifier 10 i/o pin equivalent circuit diagrams esd diode esd diode vb ho vs esd diode esd diode lo com 200 v 15 v clamp 20 v clamp v cc vcc
irs20957s www.irf.com ? 2008 international rectifier 11 lead definitions pin # symbol description 1 vdd floating input positive supply 2 csd shutdown timing capa citor, referenced to vss 3 in pwm non-inverting input, in phase with ho 4 vss floating input supply return 5 nc 6 vref 5v reference output for setting ocset 7 ocset low side over current threshold setting, referenced to com 8 dt input for programmable dead-time, referenced to com 9 com low side supply return 10 lo low side output 11 vcc low side logic supply 12 nc 13 vs high side floating supply return 14 ho high side output 15 vb high side floating supply 16 csh high side over current sensing input, referenced to vs lead assignments 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 irs20957 vdd in csd vss ocset dt vref com lo vcc ho vs csh vb nc nc
irs20957s www.irf.com ? 2008 international rectifier 12 waveform definitions vth1 t sd 90% csd ho/lo figure 1: switching time waveform definitions figure 2: csd to shutdown waveform definitions vth ocl t ocl 90% vs lo vth och t och 90% csh ho vs figure 3: v s > vth ocl to shutdown waveform figure 4: v csh > vth och to shutdown waveform application information and additional information please refer to an-1144 for irs20957 functional description.
irs20957s www.irf.com ? 2008 international rectifier 13 package details: soic16n
irs20957s www.irf.com ? 2008 international rectifier 14 package details: soic16n, tape and reel carrier tape dimension for 16soicn code min max min max a 7.90 8.10 0.311 0.318 b 3.90 4.10 0.153 0.161 c 15.70 16.30 0.618 0.641 d 7.40 7.60 0.291 0.299 e 6.40 6.60 0.252 0.260 f 10.20 10.40 0.402 0.409 g 1.50 n/a 0.059 n/a h 1.50 1.60 0.059 0.062 metric imperial reel dimensions for 16soicn code min max min max a 329.60 330.25 12.976 13.001 b 20.95 21.45 0.824 0.844 c 12.80 13.20 0.503 0.519 d 1.95 2.45 0.767 0.096 e 98.00 102.00 3.858 4.015 f n/a 22.40 n/a 0.881 g 18.50 21.10 0.728 0.830 h 16.40 18.40 0.645 0.724 metric imperial e f a c d g a b h n ote : controlling dimension in mm loaded tape feed direction a h f e g d b c
irs20957s www.irf.com ? 2008 international rectifier 15 part marking information irsxxxxx ir logo yww ? part number date code pin 1 identifier lot code (prod mode ? 4 digit spn code) assembly site code per scop 200-002 ? xxxx marking code lead free released non-lead free released ? p
irs20957s www.irf.com ? 2008 international rectifier 16 ordering information standard pack base part number package type form quantity complete part number tube/bulk 45 irs20957spbf irs20957s soic16n tape and reel 2500 IRS20957STRPBF the information provided in this document is believed to be accu rate and reliable. however, 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 which may result fr om the use of this information. no license is granted by imp lication or otherwise under any patent or patent rights of international rect ifier. the specifications m entioned in this document are subj ect to change without notice. this document supersedes and replaces all information previously supplied. for technical support, please contact ir?s technical assistance center http://www.irf.com/technical-info/ world headquarters: 233 kansas st., el segundo, california 90245 tel: (310) 252-7105

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