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preliminary data this is preliminary information on a new product now in deve lopment or undergoing evaluation. details are subject to change without notice. december 2011 doc id 022595 rev 1 1/20 20 TDA7498E 160-watt + 160-watt dual btl class-d audio amplifier features 160-w + 160-w output power at thd = 10% with r l = 4 and v cc = 36 v 1 x 220 w output power mono parallel btl at thd = 10% with r l = 3 and v cc = 36 v wide-range single-supply operation (14 - 36 v) high efficiency ( = 85%) parallel btl function using the mode pin four selectable, fixed gain settings of nominally 23.8 db, 29.8 db, 33.3 db and 35.8 db differential inputs minimize common-mode noise standby and mute features smart protection thermal overload protection small offset less than 20 mv description the TDA7498E is a dual btl class-d audio amplifier with a single power supply designed for home systems and active speaker applications. it comes in a 36-pin powersso package with exposed pad up (epu) to facilitate mounting a separate heatsink. powersso36 with exposed pad up table 1. device summary order code operating temp. range package packaging TDA7498E 0 to 70 c powersso36 (epu) tube TDA7498Etr 0 to 70 c powersso36 (epu) tape and reel www.st.com
contents TDA7498E 2/20 doc id 022595 rev 1 contents 1 device block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2 pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.1 pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.2 pin list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3 electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3.1 absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3.2 thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3.3 recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3.4 electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 3.5 test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 4 characterization curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 4.1 for r l = 4 , stereo configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 4.2 for r l = 3 , mono btl configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 5 application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 5.1 stereo and mono btl operation selection using the mode pin . . . . . . . 16 5.2 gain setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 5.3 smart protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 6 package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 7 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
TDA7498E list of figures doc id 022595 rev 1 3/20 list of figures figure 1. internal block diagram (showing one channel only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 figure 2. pin connections (top view, pcb view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 figure 3. test circuit stereo application and mono btl mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 figure 4. output power vs. supply voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 figure 5. thd vs. output power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 figure 6. thd vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 figure 7. fft performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 figure 8. crosstalk vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 figure 9. output power vs. supply voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 figure 10. thd vs. output power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 figure 11. thd vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 figure 12. powersso36 epu outline drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
device block diagram TDA7498E 4/20 doc id 022595 rev 1 1 device block diagram figure 1 shows the block diagram of one of the two identical channels of the TDA7498E. figure 1. internal block diagram (showing one channel only)
TDA7498E pin description doc id 022595 rev 1 5/20 2 pin description 2.1 pinout figure 2. pin connections (top view, pcb view) 1 2 3 4 5 6 7 8 9 10 11 12 1 3 14 15 16 17 1 8 2 8 29 3 0 3 1 3 2 33 3 4 3 5 3 6 19 20 21 22 2 3 24 25 26 27 v ss s ub_gnd outpb outpb pgndb pgndb pvccb pvccb outnb outnb outna outna pvcca pvcca pgnda pgnda outpa outpa pgnd vddpw s tby mute inpa inna ro s c s ynclk vdd s s gnd diag s vr gain mode inpb innb vref s vcc ep, expo s ed p a d connect to gro u nd
pin description TDA7498E 6/20 doc id 022595 rev 1 2.2 pin list table 2. pin description list number name type description 1 sub_gnd pwr connect to the frame 2,3 outpb o positive pwm for right channel 4,5 pgndb pwr power stage ground for right channel 6,7 pvccb pwr power supply for right channel 8,9 outnb o negative pwm output for right channel 10,11 outna o negative pwm output for left channel 12,13 pvcca pwr power supply for left channel 14,15 pgnda pwr power stage ground for left channel 16,17 outpa o positive pwm output for left channel 18 pgnd pwr power stage ground 19 vddpw o 3.3-v (nominal) regulator output referred to ground for power stage 20 stby i standby mode control 21 mute i mute mode control 22 inpa i positive differential input of left channel 23 inna i negative differentia l input of left channel 24 rosc o master oscillator frequency-setting pin 25 synclk i/o clock in/out for external oscillator 26 vdds o 3.3-v (nominal) regulator output referred to ground for signal blocks 27 sgnd pwr signal ground 28 diag o open-drain diagnostic output 29 svr o supply voltage rejection 30 gain i gain setting input 31 mode i enables stereo or mono btl mode of operation 32 inpb i positive differential input of right channel 33 innb i negative differentia l input of right channel 34 vref o half vdds (nominal) referred to ground 35 svcc pwr signal power supply 36 vss o 3.3-v (nominal) regulator output referred to power supply - ep - exposed pad for heatsink, to be connected to ground
TDA7498E electrical specifications doc id 022595 rev 1 7/20 3 electrical specifications 3.1 absolute maximum ratings 3.2 thermal data 3.3 recommended operating conditions table 3. absolute maximum ratings symbol parameter value unit v cc dc supply voltage for pins pvcca, pvccb, svcc 40 v v i voltage limits for input pins stby, mute, inna, inpa, innb, inpb, gain, mode -0.3 to 4.0 v t j operating junction temperature 0 to 150 c top operating ambient temperature 0 to 70 c t stg storage temperature -40 to 150 c table 4. thermal data symbol parameter min typ max unit r th j-case thermal resistance, ju nction to case - 3.0 c/w table 5. recommended operating conditions symbol parameter min typ max unit v cc supply voltage for pins pvcca, pvccb, svcc 14 - 36 v tamb ambient operating temperature 0 - 70 c
electrical specifications TDA7498E 8/20 doc id 022595 rev 1 3.4 electrical specifications unless otherwise stated, the values in the table below are specified for the conditions: v cc =36v, r l = 4 , r osc = r3 = 39 k , c8 = 100 nf, f = 1 khz, g v = 23.6 db ta m b = 2 5 c. table 6. electrical specifications symbol parameter condition min typ max unit i q total quiescent current no lc filter, no load - 60 ma i qstby quiescent current in standby - - 1 a v os output offset voltage vi = 0 av = 23.6 db, no load -20 - 20 mv i ocp overcurrent protection threshold r l = 0 10 11 14 a t j junction temperature at thermal shutdown - 140 150 160 c r i input resistance differential input 69 - k v uvp undervoltage protection threshold - - - 8 v r dson power transistor on resistance high side - 0.15 - low side - 0.15 - p o output power thd = 10% - 160 - w thd = 1% - 125 - p o parallel btl (mono) output power, r l = 3 ohm, vcc = 36 v thd = 10% - 220 - w thd = 1% - 170 - efficiency - 85 - % thd total harmonic distortion p o = 1 w - 0.05 - % g v closed-loop gain gain0 < 0.25*vdd 23.8 db 0.25*vdd < gain < 0.5*vdd 29.8 0.5*vdd < gain < 0.75*vdd 33.3 gain > 0.75*vdd 35.8 g v gain matching - -1 - 1 db c t crosstalk f = 1 khz, p o = 1 w 50 60 - db vn total output noise inputs shorted and to ground a curve 231 v inputs shorted and to ground f = 20 hz to 20 khz 400 v svrr supply voltage rejection ratio fr = 100 hz, vr = 0.5 vpp, c svr = 10 f -55-db t r , t f rise and fall times - - 35 - ns f sw switching frequency internal oscillator 240 310 400 khz f swr output switching frequency range with internal oscillator by changing rosc (1) 240 - khz
TDA7498E electrical specifications doc id 022595 rev 1 9/20 v inh digital input high (h) - 2.0 - - v v inl digital input low (l) - - 0.8 function mode standby & mute & play stby < 0.5 v, mute = x standby stby > 2.5 v ; mute < l mute stby > 2.5 v, mute > h play a mute mute attenuation v mute < l, v stby = h - 75 - db 1. f sw = 10 6 / ((16 * r osc + 182) * 4) khz, f synclk = 2 * f sw with r3 = 39 k (see figure 3 ) table 6. electrical specifications (continued) symbol parameter condition min typ max unit
electrical specifications TDA7498E 10/20 doc id 022595 rev 1 3.5 test circuit figure 3. test circuit stereo application and mono btl mode gain setting gain jumper 23.6db 29.6db 33.1db 35.6db j9 j10 j11 j12 optional components or circuitry l+ r+ r- vcc gnd l+ l- r+ r- TDA7498E mute stby 3v3 power supply single-ended input class-d amplifier for single-ended input and load=4 ohm for loutput input l- mono out frequency shift load=4 ohm r-output mono out (psso36) mono config mono config mono input l+, l- only mode setting stereo mono mode jumper j5 j6,j3,j8 c5 100nf l4 c1 1uf c2 1uf c11 1uf c12 1uf c25 100nf c19 100nf c27 330pf r6 22r c40 220nf c41 220nf c21 330pf r5 22r c42 220nf c43 220nf c3 1nf c4 1nf c13 1nf c14 1nf 32 inpb 36 vss 9 outnb 5 pgndb 7 pvccb 3 outpb 10 outna 12 pvcca 14 pgnda 16 outpa 33 innb 8 outnb 4 pgndb 21 mute 6 pvccb 2 outpb 29 svr 11 outna 1 sub_gnd 22 inpa 23 inna 27 sgnd 26 vdds 28 diag 19 vddpw 18 pgnd 20 stby 24 rosc 31 mode 35 svcc 30 gain 25 synclk 17 outpa 15 pgnda 34 vref 13 pvcca ic1 TDA7498E r1 47k r7 22r c6 100nf r4 120k r2 33k r8 6.8k c26 1uf c10 100nf c20 1uf j6 j9 2 1 3 s1 2 1 3 s2 c9 100nf c29 2.2uf 2 gnd 1 out 3 in ic2 l4931cz33 + c15 2.2uf 16v 1 2 j2 j8 j7 + c7 2.2uf 16v + c23 2200uf 50v l3 l1 l2 c17 10uf 10v c16 10uf 10v d1 18v j4 c30 1uf c31 1uf r15 8r c28 220nf r16 8r c24 220nf r17 8r c18 220nf r18 8r c22 220nf sync 2 4 1 3 j1 r10 100k r11 100k r12 100k j11 j12 j5 j10 j3 r3 39k c8 100nf r9 180k 1 2 3 q1 ktc3875(s) r13 47k r14 100k d2 d3 d4 d8 d6 d5 d7 d9 + c32 2200uf 50v 1 2 j14 1 2 j13 wl+ wr+ wl- wr- l1s l2s l3s l4s r19 33k diag vdds vdds vdds vcc vcc vcc vcc vcc vdds 3v3 ps ps
characterization curves TDA7498E 11/20 doc id 022595 rev 1 4 characterization curves unless otherwise stated, measurements were made under the following conditions: vcc = 36 v, f = 1 khz , g v = 23.6 db, rosc = 39 k , cosc = 100 nf, tamb = 25 c. 4.1 for r l = 4 , stereo configuration figure 4. output power vs. supply voltage
characterization curves TDA7498E 12/20 doc id 022595 rev 1 figure 5. thd vs. output power figure 6. thd vs. frequency
TDA7498E characterization curves doc id 022595 rev 1 13/20 figure 7. fft performance figure 8. crosstalk vs. frequency
characterization curves TDA7498E 14/20 doc id 022595 rev 1 4.2 for r l = 3 , mono btl configuration figure 9. output power vs. supply voltage
TDA7498E characterization curves doc id 022595 rev 1 15/20 figure 10. thd vs. output power figure 11. thd vs. frequency
application information TDA7498E 16/20 doc id 022595 rev 1 5 application information 5.1 stereo and mono btl operat ion selection using the mode pin the TDA7498E can be used in stereo applications or mono btl applications. connecting the mode pin to the vdds pin configures the device in mono btl. the output of the two channels can be paralleled. when the mode pin is connected to ground or floating (pulled down internally) the device works as a stereo amplifier. 5.2 gain setting the gain of the TDA7498E is set by gain (pin 30). 5.3 smart protection to avoid dynamic impedance drop, two overcurrent thresholds are set. the first threshold is for the overcurrent limit. the device limits the output current to the first threshold but does not shut down the pwm outputs. if the device is shorted and at least one of the two output currents reaches the second threshold, the device is shut down immediatel y. the device will recover automatically when the fault is removed from the btl outputs. table 7. gain settings gain0 total gain application suggestion vgain < 0.25*vdds 23.6 db gain pin connected to sgnd 0.25*vdds < vgain < 0.5*vdds 29.6 db rc10 = rc11= rc12 = 100 k max 0.5*vdds < vgain < 0.75*vdds 33.1 db rc10 = rc11 = rc12 = 100k max vgain > 0.75*vdds 35.6 db gain pin connected to vdds
TDA7498E package mechanical data doc id 022595 rev 1 17/20 6 package mechanical data in order to meet environmental requirements, st offers these devices in different grades of ecopack ? packages, depending on their level of environmental compliance. ecopack ? specifications, grade definitions and product status are available at: www.st.com . ecopack ? is an st trademark. the TDA7498E comes in a 36-pin powersso package with exposed pad up. figure 12 shows the package outline and ta bl e 8 gives the dimensions. table 8. powersso36 epu dimensions symbol dimensions in mm dimensions in inches min typ max min typ max a 2.15 - 2.45 0.085 - 0.096 a2 2.15 - 2.35 0.085 - 0.093 a1 0 - 0.10 0 - 0.004 b 0.18 - 0.36 0.007 - 0.014 c 0.23 - 0.32 0.009 - 0.013 d 10.10 - 10.50 0.398 - 0.413 e 7.40 - 7.60 0.291 - 0.299 e - 0.5 - - 0.020 - e3 - 8.5 - - 0.335 - f - 2.3 - - 0.091 - g- - 0.10 - - 0.004 h 10.10 - 10.50 0.398 - 0.413 h- - 0.40 - - 0.016 k 0 - 8 degrees - - 8 degrees l 0.60 - 1.00 0.024 - 0.039 m - 4.30 - - 0.169 - n - - 10 degrees - - 10 degrees o - 1.20 - - 0.047 - q - 0.80 - - 0.031 - s - 2.90 - - 0.114 - t - 3.65 - - 0.144 - u - 1.00 - - 0.039 - x 4.10 - 4.70 0.161 - 0.185 y 4.90 - 7.10 0.193 - 0.280
TDA7498E package mechanical data doc id 022595 rev 1 18/20 figure 12. powersso36 epu outline drawing h x 45
TDA7498E revision history doc id 022595 rev 1 19/20 7 revision history table 9. document revision history date revision changes 12-dec-2011 1 initial release.
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