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microsemi linfinity microelectronics division 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 1 copyright ? 2001 rev. 1.2a,2004-06-10 www. microsemi . com audiomax? lx1721 / 1722 class-d stereo power amplifier controller p roduction integrated products description the lx1721/1722 is a monolithic high performance class-d stereo controller ic designed for high ef ficiency or space constrained audio requirements such as portable or battery operated products, automotive amplifiers, and multi-channel multimedia computer and video game applications. this high frequency, full audio bandwidth switching power amplifier controller offers dramatically improved performance over linfinity?s p revious generation amplifier products. enhancements include higher output power, better snr, lower noise floor, and reduced thd. combined with output power mosfet?s and an output filter, the lx1721/1722 is a complete class-d audio solution. a complete audio amplifier module is available to quickly evaluate the lx1721 or lx1722 stereo controller. simply connect the amplifier to the power source, audio signal, and speakers. reference designs support a variety of requirements including multi channel systems, subwoofers, satellite / subwoofer com- binations and various speaker loads (2 ? , 4 ? , 8 ? ). the versatile amplifier solution can easily be adjusted for frequency response, optimized for efficiency and performance, or designed to minimize pcb area and component count. the lx1721/1722 is ava ilable in a space saving 44-pin qsop package. (continued next page) important: for the most current data, consult microsemi ?s website: http://www.microsemi.com product highlight lx1722 stereo fets fets lx1711 mono fets in + in - in + in - in + in - clock left right subwoofer 2 ? , 4 ? , 8 ? channel 1 channel 2 channel 3 7v - 25v 2.1 audio amplifier configuration output power vs. supply voltage 1khz, 4 ? , thd+n=1% key features ? integrated switching class-d stereo controller ic ? full 20hz-20khz audio bandwidth ? high fidelity (lx1721) or high power (lx1722) versions available ? single supply operation ? thd+n <0.06% typical (1wrms, 1khz, 4 ? ) ? maximum efficiency 80%- 85% ? output power >60wrms per channel (lx1722, 4 ? , 1% thd+n) ? psrr ?70db typical ? differential input to minimize noise effects ? supports multi-channel systems ? complete lxe1721or lxe1722 amplifier evaluation module available ? 44-pin qsop package applications ? multimedia speakers ? surround sound game systems ? notebook computers ? desktop computers ? automotive amplifiers and head units ? battery operated equipment (megaphone, public address system) ? portable audio (boom box) ? wireless speakers ? high power subwoofer ? automotive audio systems ? home theatre package order info t j ( c) v dd db plastic qsop 44-pin -20 to 70 7v ? 15v lx1721cdb -20 to 70 7v ? 25v lx1722cdb note: available in tape & reel. append the letters ?tr? to the part number. (i.e. LX1722CDBTR) l l x x 1 1 7 7 2 2 1 1 / / 2 2 2 2
microsemi linfinity microelectronics division 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 2 copyright ? 2001 rev. 1.2a,2004-06-10 www. microsemi . com audiomax? lx1721 / 1722 class-d stereo power amplifier controller p roduction integrated products thermal data db 44-p in qssop p ackage thermal resistance - junction to ambient , ja 50 c/w junction temperature calculation: t j = t a + (p d x ja ). the ja numbers are guidelines for the therma l performance of the device/pc-board system. all of the above assume no ambient airflow. package pin out 1 22 23 44 lfaout cpwm rpwm lmute leaout leain vref clock gnd v25 lin+ lin- lampout rin+ rin- rampout sleep status rmute reain reaout rfaout lfbk- lfbk+ lisn vdd cn pvdd pgnd ln+ lp+ lp- ln- rn- rp- rp+ rn+ pgnd cp pvdd nc risn rfbk+ rfbk- db p ackage (top view) description (continuted) the stereo output controller is available in either an lx1722 high power version (>65wrms, 4 ? ) with a supply voltage range of 7v-25v or an lx1721 high fidelity version (better snr performance) with a supply voltage range of 7v-15v. the curr ent rating of the external mosfet?s, the available supply voltage, and speaker load primarily limits the maximum output power. the amplifier provides high fidelity performance and is designed to operate over the full 20hz to 20khz audio band. signal distortion measurements yield. thd+n levels of 0.06%(1khz , 1wrms). efficiency is greater than 80% typical, whic h eliminates the need for heatsinks in most applications. the audiomax? solution requires a single supply voltage, simplifying input power requirements where a dual supply may not be available. to minimize potential environmental noise issues and ease the integration of the amplifier into a variety of applications, features such as a balanced/differential audio input and a high power supply rejection ratio help reduce the effects of noise from the audio signal or power supply. p p a a c c k k a a g g e e d d a a t t a a
microsemi linfinity microelectronics division 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 3 copyright ? 2001 rev. 1.2a,2004-06-10 www. microsemi . com audiomax? lx1721 / 1722 class-d stereo power amplifier controller p roduction integrated products functional pin description p in n ame d escription p in n ame d escription lfaout left feedback amplifier output lfbk- left feedback amplifier inverting input cpwm pwm capacitor connection lfbk+ left feedback amplifier non-inverting input rpwm pwm resistor connection lisn left current limit sense input lmute left mute input (active high) vdd analog supply voltage leaout left error amplifier output cn supply decoupling for nfet drivers leain left inverting input of error amplifier pvdd output driver supply voltage vref 5v reference pgnd output driver high current ground clock input / output clock for synch operation ln+ left drive for nfet on positive half of bridge gnd low current ground lp+ left drive for pfet on positive half of bridge v25 2.5v reference lp- left drive for pfet on negative half of bridge lin+ left positive audio input ln- left drive for nfet on negative half of bridge lin- left negative audio input rn- right drive for nfet on negative half of bridge lampout left input amplifier output rp- right drive for pfet on negative half of bridge rin+ right positive audio input rp+ right drive for pfet on positive half of bridge rin- right negative audio input rn+ right drive for nfet on positive half of bridge rampout right input amplifier output pgnd output driver high current ground sleep sleep input (active low) cp supply decoupling for pfet drivers status uvlo indicator (open collector output) pvdd output driver supply voltage rmute right mute input (active high) nc no connect reain right inverting input of error amplifier risn right current limit sense input reaout right error amplifier output rfbk+ left feedback amplifier non-inverting input rfaout right feedback amplifier output rfbk- right feedback amplifier inverting input absolute maximum ratings supply voltage (pvdd, vdd) ..................................................................................................... ........................ -0.3v to 30v sleep , status, r/lfbk+, r/lfbk- .................................................................................................-0.3v to vdd +0.3v r/lisn ......................................................................................................................... ................pvdd ?2 to pvdd to +0.3v rpwm, cpwm, r/lmute ............................................................................................................ ....... -0.3v to vref +0.3v r/lin+, r/lin- , r/lampout...................................................................................................... ........ -0.3v to vref +0.3v r/leain, r/leaout, r/lfaout .................................................................................................... . -0.3v to vref + 0.3v clock .......................................................................................................................... ..............................-0.3v to cn +0.3v operating junction te mperature plastic......................................................................................... .................................. 125c storage temper ature range ...................................................................................................... .........................-65c to 150c lead temperature (soldering, 10 seconds) ....................................................................................... ............................... 300c note: exceeding these ratings could cause damage to the device. all voltages are with respect to ground. currents are positi ve into negative out of the specified terminal. p p a a c c k k a a g g e e d d a a t t a a
microsemi linfinity microelectronics division 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 4 copyright ? 2001 rev. 1.2a,2004-06-10 www. microsemi . com audiomax? lx1721 / 1722 class-d stereo power amplifier controller p roduction integrated products electrical characteristics unless otherwise specified, the following specifications apply over the operating ambient temperature -20c < t a < 70c (note 2). test conditions: rpwm = 34.8k, cpwm = 100pf, vdd = pvdd = 15v lx1721 / 1722 parameter symbol test conditions min typ max units evaluation module (see lxe1721) supply voltage lx1721 7 15 lx1722 v dd 7 25 v power supply rejection ratio psrr v in = 15v, v ripple = 1v rms , 20hz to 20khz -70 db v in = 15v, r l =4 ? , thd+n=1%, 10hz to 22khz 25 output power (per channel) p o v in = 25v, r l =4 ? , thd+n=1%, 10hz to 22khz 60 w v in = 15v, f in = 1khz, p o = 10w 82 efficiency v in = 15v, f in = 1khz, p o = 20w 85 % f in = 1khz, p o = 1w .06 total harmonic distortion plus noise thd+n f in = 20hz to 20khz, p o = 1w .2 % signal-to-noise ratio snr r l = 4 ? , p o = 1w 81 dbr oscillator section oscillator frequency f osc 450 khz charge current i chg (varies with v dd pin voltage) -225 a discharge current i dis (varies with v dd pin voltage) 225 a oscillator peak voltage v pk (varies with v dd pin voltage) 3.6 v oscillator valley voltage v val (varies with v dd pin voltage) 1.4 v voltage stability v dd = 8v to 25v 0.6 2 % temperature stability t a = 0 o c to 70 o c 1.0 2 % error amplifier input offset voltage v io 5 ? mv dc open loop gain a ol 60 db unity gain bandwidth ugbw 7 ? mhz high output voltage v oh i out = -100 a 3.5 v low output voltage v ol i out = +100 a 100 ? mv input bias current i in v in = 1v to 4v 1 a input amplifier stage gain set by internal resistors 3.465 3.5 3.535 v/v output voltage, high v oh i out = -100 a 3.85 v output voltage, low v ol i out = +100 a 1.3 v input impedance 180 ? k ? feedback amplifier stage gain lx1721 set by internal resistors 89 91 93 ? mv/v lx1722 set by internal resistors 56 57 58 ? mv/v input impedance lx1721 250 k ? lx1722 400 k ? e e l l e e c c t t r r i i c c a a l l s s
microsemi linfinity microelectronics division 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 5 copyright ? 2001 rev. 1.2a,2004-06-10 www. microsemi . com audiomax? lx1721 / 1722 class-d stereo power amplifier controller p roduction integrated products electrical characteristics (continued) lx1721 / 1722 parameter symbol test conditions min typ max units current limit comparator voltage sense threshold 190 210 230 mv blanking pulse delay 500 ? ns response time excludi ng blanking pulse 250 ? ns i um pulses required to current limit latch 4 4 4 ? cycles consecutive clear pu lses required to reset i um counter 2 2 2 ? cycles reference voltage section initial accuracy (vref) 5.0 voltage stability (vref) 50 100 ? mv initial accuracy (v25) 2.5 voltage stability (v25) 25 50 mv temperature stability t a = 0 o c to 70 o c 2 5 ? mv line regulation v dd = 9v to 15v 0.5 ? mv load regulation i out = 0 to 10ma 5 ? mv under voltage lockout section start threshold voltage 6 v uv lockout hysteresis 250 mv uvlo delay to output enable 62,500 clkcyc supply current sleep current sleep input = 0v, t a = 25 o c 30 a operating current sleep input = 2v, v in = 15v, no mosfets connected 8 11 ? ma sleep to output enable 62,500 clkcyc sleep threshold 1.45 1.6 1.75 v mute section mute threshold 1.2 1.35 1.5 v output drivers for n-channel mosfets i sink = 3ma 30 100 ? mv nfet drivers, low level voltage v ol i sink = 100ma 0.3 1.0 v i source = 3ma, c n = 5.2v applied externally 30 100 ? mv nfet drivers, high level voltage v oh i source = 100ma, c n = 5.2v applied externally 0.3 1.0 v output drives for p-channel mosfets i sink = 3ma 30 100 ? mv pfet drivers, low level voltage v ol i sink = 100ma 0.5 1.0 v i source = 3ma, c p = 5.2v (applied externally) 30 100 ? mv pfet drivers, high level voltage v oh i source = 100ma, c p = 5.2v (applied externally) 0.5 1.0 v note 2: the lx1721 / 22cdb is guaranteed to meet performance speci fications from 0 to 70c. specifications over the -20 to 0 c operation temperature range are assured by design, characteriza tion, and statistical process control. e e l l e e c c t t r r i i c c a a l l s s
microsemi linfinity microelectronics division 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 6 copyright ? 2001 rev. 1.2a,2004-06-10 www. microsemi . com audiomax? lx1721 / 1722 class-d stereo power amplifier controller p roduction integrated products block diagram sleep vref v25 cn pvdd cp lp+ ln+ lp- ln- lfaout lfbk- lfbk+ vdd lisn clock rpwm cpwm leaout leain lampout lin- lin+ lmute uvlo & reference output drivers & logic fault timer 5v reference 28 10 7 17 clk osc sync + - 220mv pvdd mux mute mute 11 5 6 13 4 12 2 3 8 42 41 1 44 feedback amp error amp current sense input amp 43 27,39 36 37 34 35 s r q q clk 5v reference 40 2.5v 2.5v f igure 1 ? lx1721 / 22 s implified b lock d iagram (l eft c hannel c ircuit s hown ) b b l l o o c c k k d d i i a a g g r r a a m m
microsemi linfinity microelectronics division 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 7 copyright ? 2001 rev. 1.2a,2004-06-10 www. microsemi . com audiomax? lx1721 / 1722 class-d stereo power amplifier controller p roduction integrated products application information frequency synchronization two or more lx1721 / lx1722 oscillators can be configured for synchronous operation. one unit, the master, is programmed for the desired frequency with the r pwm and c pwm as usual. additional units will be slave units , and their oscillators will be disabled by leaving the r pwm pin disconnected. the clock pin and the c pwm pin of the slave units should be tied to the clock pin and the c pwm pin of the master unit respectively. in this configuration, the clock pins of the slave units begin receiving instead of transmitting clock pulses. also, the c pwm pins quit driving the pwm capacitor in the slave units. note that for optimum performance, all slave un its should be located within a few inches of the master unit. oscillator configuration (r pwm and c pwm selection) the oscillator is programmed by the external timing components r pwm and c pwm . for a nominal frequency of 333khz, r pwm and c pwm should be set to 49.9kohms and 100pf respectively. note that in order to keep the slope of th e pwm ramp voltage proportional to the supply voltage, both the ramp peak and valley voltages, and the charge and discharge currents are proportional to the supply voltage. this keeps the frequency relatively constant while keeping the slope of the pwm ramp proportional to the voltage on the vdd pin. for operating frequencies other than 333khz, the frequency can be approximated by the following equation: ns c r pwm pwm 320 ) )( )( 577 . 0 ( 1 frequency + = a a p p p p l l i i c c a a t t i i o o n n
microsemi linfinity microelectronics division 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 8 copyright ? 2001 rev. 1.2a,2004-06-10 www. microsemi . com audiomax? lx1721 / 1722 class-d stereo power amplifier controller p roduction integrated products characteristic curves thd+n (%) 0.001 100 0.002 0.005 0.01 0.02 0.05 0.1 0.2 0.5 1 2 5 10 20 50 0.24563 0.06751 100m 100 200m 500m 1 2 5 10 20 50 19.12 .9161 output power (w) dx=-18.20 w dy=-0.17812 % f igure 2 ? thd+n vs . o utput p ower v in = 15v f in = 1khz r l = 4 ? thd+n (%) 0.001 100 0.002 0.005 0.01 0.02 0.05 0.1 0.2 0.5 1 2 5 10 20 50 0.0629 0.53924 100m 100 200m 500m 1 2 5 10 20 50 1.225 59.95 output power (w) dx=58.73 w dy=0.47633 % f igure 3 ? thd+n vs . o utput p ower v in = 25v f in = 1khz r l = 4 ? thd+n (%) 0.001 100 0.002 0.005 0.01 0.02 0.05 0.1 0.2 0.5 1 2 5 10 20 50 0.26783 0.04397 100m 100 200m 500m 1 2 5 10 20 50 38.24 1.252 output power (w) dx=-36.99 w dy=-0.22386 % f igure 4 ? thd+n vs . o utput p ower v in = 15v f in = 1khz r l = 2 ? g g r r a a p p h h s s
microsemi linfinity microelectronics division 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 9 copyright ? 2001 rev. 1.2a,2004-06-10 www. microsemi . com audiomax? lx1721 / 1722 class-d stereo power amplifier controller p roduction integrated products characteristic curves (continued) 0.001 100 0.002 0.005 0.01 0.02 0.05 0.1 0.2 0.5 1 2 5 10 20 50 0.05123 0.53924 thd+n(%) 100m 300 200m 500m 1 2 5 10 20 50 100 200 1.136 109.9 output power (w) dx=108.8 w dy=0.48800 % f igure 5 ? thd+n vs . o utput p ower v in = 25v f in = 1khz r l = 2 ? 0.001 100 0.002 0.005 0.01 0.02 0.05 0.1 0.2 0.5 1 2 5 10 20 50 0.19402 0.02322 thd+n (%) 20 20k 50 100 200 500 1k 2k 5k 10k 5.025k 126.2 frequency (hz) dx=-4.8988 khz dy=-0.17080 % f igure 6 ? thd+n vs . f requency v in = 15v r l = 4 ? p o = 1w rms 0.001 100 0.002 0.005 0.01 0.02 0.05 0.1 0.2 0.5 1 2 5 10 20 50 0.1798 0.06044 thd+n (%) 20 20k 50 100 200 500 1k 2k 5k 10k 5.025k 126.2 frequency (hz) dx=-4.8988 khz dy=-0.11937 % f igure 7 ? thd+n vs . f requency v in = 25v r l = 4 ? p o = 1w rms g g r r a a p p h h s s
microsemi linfinity microelectronics division 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 10 copyright ? 2001 rev. 1.2a,2004-06-10 www. microsemi . com audiomax? lx1721 / 1722 class-d stereo power amplifier controller p roduction integrated products characteristic curves (continued) -10 +10 -8 -6 -4 -2 +0 +2 +4 +6 +8 -0.965 -1.119 voltage amplification (dbr) 10 80k 20 50 100 200 500 1k 2k 5k 10k 20k 50k 17.8875k 18.2 frequency (hz) dx=-17.869 khz dy=-0.155 db f igure 8 ? f requency r esponse v in = 15v r l = 4 ? p o = 1w rms -10 +10 -8 -6 -4 -2 +0 +2 +4 +6 +8 -1.606 -1.436 voltage amplification (dbr) 10 80k 20 50 100 200 500 1k 2k 5k 10k 20k 50k 17.8875k 18.2 frequency (hz) dx=-17.869 khz dy=+0.170 db f igure 9 ? f requency r esponse v in = 25v r l = 4 ? p o = 1w rms -150 +10 -140 -130 -120 -110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 +0 -98.12 -94.916 dbv 20 20k 50 100 200 500 1k 2k 5k 10k 3.96192k .973932k frequency (hz) dx=-2.9880 khz dy=+3.205 db f igure 10 ? n oise f loor fft v in = 15v r l = 4 ? 10hz ? 22khz bandwidth a-weighted g g r r a a p p h h s s
microsemi linfinity microelectronics division 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 11 copyright ? 2001 rev. 1.2a,2004-06-10 www. microsemi . com audiomax? lx1721 / 1722 class-d stereo power amplifier controller p roduction integrated products characteristic curves (continued) -150 +10 -140 -130 -120 -110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 +0 -94.11 -96.079 dbv 20 20k 50 100 200 500 1k 2k 5k 10k 3.96192k .973932k frequency (hz) dx=-2.9880 khz dy=-1.969 db f igure 11 ? n oise f loor fft v in = 25v r l = 4 ? 10hz ? 22khz bandwidth a-weighted 45% 50% 55% 60% 65% 70% 75% 80% 85% 90% 0 5 10 15 20 25 30 output power (w) efficency (%) 8 ? 4 ? 2 ? f igure 12 ? e fficiency vs . o utput p ower v in = 15v f in = 1khz power supply rejection ratio (psrr) -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 0 10 100 1000 10000 100000 frequency (hz) amplitude (db) 15v+1,left 15v+1,right 15v-1,left 15v-1,right f igure 13 ? p ower s upply r ejection r atio (pssr) p o = 1w rms r l = 4 ? g g r r a a p p h h s s
microsemi linfinity microelectronics division 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 12 copyright ? 2001 rev. 1.2a,2004-06-10 www. microsemi . com audiomax? lx1721 / 1722 class-d stereo power amplifier controller p roduction integrated products application rfbk+ vcc r13 5.1/1w q5 c34 0.47uf/50v c7 100pf r10 5.1/1w u1 lx1721-01cdb 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 lfaout cpwm rpwm _lmute leaout leain vref clock gnd v25 lin+ lin- lampout rin+ rin- rampout sleep status _rmute reain reaout rfaout rfbk- rfbk+ risn nc pvdd cp pgnd rn+ rp+ rp- rn- ln- lp- lp+ ln+ pgnd pvdd cn vdd lisn lfbk+ lfbk- r14 5.1/1w r1 10k + c15 10uf/25v + c21 47uf/25v vcc r4 56.2k 1% l1 15uh risn c33 0.68uf/50v risn rfbk- + c1 1000f 25v c31 0.47uf/50v q3 lfbk- c30 0.68uf/50v outr+ pgnd c27 220pf r8 5.1/1w vcc rn- l4 15uh ln+ c14 0.1uf/25v jp1 teminal 2 1 2 c10 150pf c28 220pf ln- lin+ outl+ c2 0.1uf/25v c19 0.1uf/25v l2 15uh c29 0.68uf/50v outr- pgnd c12150pf pgnd r11 5.1/1w q6 + c20 4.7uf/25v,tant c3 0.47uf r6 0.020/1w r17 24.3k 1% rfbk- vcc rfbk+ rp+ vcc vcc c16 0.1uf/25v r15 5.1/1w lfbk+ r20 15/1w r21 15/1w r2 56.2k 1% r16 24.3k 1% c5 0.47uf vcc r3 10k q7 c9 18pf c6 0.47uf pgnd rn+ rin- lin- + c17 4.7uf/25v,tant vcc + c18 47uf/25v q8 vcc gnd c32 0.68uf/50v c25 220pf rin+ _mute r12 5.1/1w gnd lfbk- r9 5.1/1w vcc r7 0.020/1w lisn lin+ rin- c11 18pf lin- c26 220pf pgnd c22 0.1uf/25v rp- + c13 1uf/10v,tant r19 24.3k 1% lfbk+ l3 15uh pgnd r5 34.8k 1% sleep q2 lisn r18 24.3k 1% rin+ lp- pgnd lp+ q1 c4 0.47uf pgnd q4 outl- f igure 14 ? t ypical c lass -d s tereo s witching a mplifier c ircuit a pplication a a p p p p l l i i c c a a t t i i o o n n
microsemi linfinity microelectronics division 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 13 copyright ? 2001 rev. 1.2a,2004-06-10 www. microsemi . com audiomax? lx1721 / 1722 class-d stereo power amplifier controller p roduction integrated products mechanical dimensions db 44-pin quarter size outline package (qsop) g e d a c m e p b f l zd 122 23 44 r m illimeters i nches dim min max min max a 2.44 2.64 0.096 0.104 b 0.28 0.51 0.011 0.020 c 0.23 0.32 0.091 0.0125 d 17.73 17.93 0.698 0.706 e 7.40 7.60 0.291 0.299 f 0.80 bsc 0.0315 bsc g 0.10 0.30 0.004 0.012 l 0.40 1.27 0.016 0.050 m 0 8 0 8 p 10.11 10.51 0.396 0.414 r 0.63 0.89 0.025 0.035 zd 0.51 ref 0.020 ref *lc - 0.10 - 0.004 * lead coplanarity note: dimensions do not include mold flash or protrusions; these shall not exceed 0. 15mm (.006?) on any side. lead dimension shal l not include solder coverage . m m e e c c h h a a n n i i c c a a l l s s
microsemi linfinity microelectronics division 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 14 copyright ? 2001 rev. 1.2a,2004-06-10 www. microsemi . com audiomax? lx1721 / 1722 class-d stereo power amplifier controller p roduction integrated products notes production data ? information contained in this document is proprietary to microsemi and is current as of publication date. this document may not be modified in any way without the express written consent of microsemi. product processing does not necessarily include testing of all parameters. microsemi reserves the right to change the configuration and performance of the product and to discontinue product at any time. n n o o t t e e s s

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