1/8 STA540 december 2004 this is preliminary information on a new product foreseen to be developed. details are subject to change without notice. 1 features output power capability 7w x 4 minimum external components count: ? no bootstrap capacitors ? no boucherot cells ? internally fixed gain 20db st-by function (cmos compatible) no audible pop during st-by operations diagnostic facilities ?clip detector ? out to gnd short ? out to vs short ? soft short at turn-on ? thermal shutdown proximity 1.1 protections ouput ac/dc short circuit soft short at turn-on overrating chip temperature with soft thermal limiter very inductive loads esd 2 description the amplifier is a class ab audio amplifier assem- bled in the clipwatt19 package designed for high quality sound application. the STA540sa is 4 single ended amplifier with in- tegrated in the device the short circuit protection, the thermal protection and the diagnostics func- tions. target specifications 7w x 4 quad amplifier figure 2. block diagram (referred to clipwatt pin numbers) 17 3 1 2 18 19 12 11 10 8 16 15 5 9 4 rev. 1 fi gure 1. p ac k ages table 1. order codes part number package STA540sa clipwatt 19 STA540p psso36 (slug-up) clipwatt 19 psso36 (slug-up)
STA540 2/8 table 2. absolute maximum ratings table 3. thermal data figure 3. pins connections (top view) symbol parameter value unit v s dc supply voltage 20 v p tot total power dissipation (t case = 70c) 35 w t op operating temperature 0 to 70 c symbol parameter clipwatt psso36 unit r th j-case thermal resistance junction to case max. 2 2 c/w r th j-amb thermal resistance junction to ambient max. 45 - c/w table 4. pin description psso36 pin# clipwatt pin# pin name pin type function 1 10 p_gnd power power ground 2 11 s_gnd power signal ground 3 12 diag output diagnostics 4, 5, 7, 8, 9, 10, 14, 15, 17, 20, 22, 23, 27, 28, 29, 30, 32, 33, 36 6, 7, 13, 14 n.c. not connected 6 15 in3 input channel 3 input 11 16 in4 input channel 4 input 12 17 vcc2 power power supply 1 2 3 4 5 6 7 d04au1558 9 10 11 8 13 14 15 16 17 18 19 12 vcc1 in1 out1 out2 n.c. svr in2 n.c. s_gnd diag st_by p_gnd in3 in4 n.c. n.c. out3 out4 vcc2 clipwatt p_gnd s_gnd diag n.c. out3 n.c. n.c. out4 n.c. n.c. out1 n.c. out2 n.c. n.c. svr st-by n.c. 18 16 17 15 6 5 4 3 2 21 22 31 32 33 35 34 36 20 1 19 p_gnd2 p_gnd1 d04au1571 n.c. vcc2 in4 vcc1 n.c. in1 9 8 7 28 29 30 n.c. n.c. 10 27 n.c. n.c. n.c. n.c. n.c. n.c. 14 12 11 23 25 26 in3 in2 13 24 psso36
3/8 STA540 (*) diag pulled-up to 5v with 10 k ? ; r l = 4 ? and symetrical clipping. 13 18 out3 output channel 3 output 16 19 out4 output channel 4 output 18 - p_gnd2 power power ground for channel 2 19 - p_gnd1 power power ground for channel 1 21 1 out1 output channel 1 output 24 2 out2 output channel 2 output 25 3 vcc1 power power supply 26 4 in1 input channel 1 input 31 5 in2 input channel 2 input 34 8 svr input supply voltage rejection 35 9 st-by input stand-by table 5. electrical characteristcs (refer to the test circuit, v s = 14.4v; r l = 4 ? ; f = 1khz; t amb = 25c unless otherwise specified). symbol parameter test condition min. typ. max. unit v s supply voltage range 8 18 v i d total quiescent drain current 80 ma v odc dc output voltage 7.2 250 mv p o output power thd = 10%: 7 w thd distortion r l = 4 ? , po = 0.1 to 4w 0.02 % c t cross talk f = 1 khz f = 10 khz 70 60 db db r in input impedance 20 30 k ? g v voltage gain 19 20 21 db g v voltage gain match 0.5 db e n total output noise rg = 0; ?a? weighted inverting channels non inverting channels 50 20 v v svr supply voltage rejection rg = 0; f = 300hz 50 db a sb stand-by attenuation 80 90 db i sb st-by current consumption v st-by = 0 to 1.5v 100 a v sb st-by in threshold voltage 1.5 v v sb st-by out threshold voltage 3.5 v i stby st-by pin current play mode v stby = 5v 50 a max driving current under fault 5 ma i cd off clipping detector output average current d = 1% (*) 90 a i cd on clipping detector output average current d = 5% (*) 140 a v diag voltage saturation on diag sink current at diag = 1ma 0.7 v t w thermal warning 140 c t m thermal muting 150 c t s thermal shut-down 160 c table 4. pin description (continued) psso36 pin# clipwatt pin# pin name pin type function
STA540 4/8 figure 4. standard test and application ci rcuit (referred to clipwatt pin numbers) 3 thermal information: the power dissipated within the device depends primarly on the supply voltage, load impedance and output modulation level. the psso36 package of the STA540p includes an exposed thermal slug on the top of the device to provide a direct thermal path from the ic to the heatsink. considering that for the STA540p the thermal resistance junction to slug is 1.5c/w and the extimated thermal resistance due to the grease placed between slug and heat sink is 2.3c/w ( the use of thermal pads for this package is not recommended), the suitable heat sink rth to be used can be drawn from the following graph fig 5, where is shown the derating power vs.tambient for different heatsinkers. figure 5. power derating curve c1 0.22 f diagnostics c10 2200 f d04au1555b c7 10 f 10k r1 st-by in1 c2 0.22 f in2 c4 0.22 f in3 c3 0.22 f in4 p-gnd s-gnd c8 47 f c5 1000 f c6 100nf v s c9 2200 f c11 2200 f c12 2200 f out1 out2 out3 out4 9 4 5 15 16 8 17 3 1 2 18 19 12 11 10 5 10 15 20 25 0 20 40 60 80 100 120 140 160 pd(w) tambient(c) 1)infinite 2) 1.5 c/w 3) 3 c/w 4) 4.5 c/w 5) 6 c/w 2 3 1 4 5 5 10 15 20 25 0 20 40 60 80 100 120 140 160 pd(w) tambient(c) 1)infinite 2) 1.5 c/w 3) 3 c/w 4) 4.5 c/w 5) 6 c/w 2 3 1 4 5
5/8 STA540 figure 6. psso36 (slug-up) mechanical data & package dimensions outline and mechanical data dim. mm inch min. typ. max. min. typ. max. a 2.15 2.47 0.084 0.097 a2 2.15 2.40 0.084 0.094 a1 0 0.075 0 0.003 b 0.18 0.36 0.007 0.014 c 0.23 0.32 0.009 0.012 d (1) 10.10 10.50 0.398 0.413 e (1) 7.4 7.6 0.291 0.299 e0.50 0.020 e3 8.50 0.035 f 2.3 0.090 g 0.10 0.004 g1 0.06 0.002 h 10.10 10.50 0.398 0.413 h 0.40 0.016 l 0.55 0.85 0.022 0.033 m 4.3 0.169 n 10? (max) o 1.2 0.047 q 0.8 0.031 s 2.9 0.114 t3.65 0.144 u 1.0 0.039 x 4.10 4.70 0.161 0.185 y 6.50 7.10 0.256 0.279 (1) ?d and e? do not include mold flash or protusions. mold flash or protusions shall not exceed 0.15mm (0.006?) (2) no intrusion allowed inwards the leads. (3) flash or bleeds on exposed die pad shall not exceed 0.4 mm per side 7618147 a powersso-36 (slug-up)
STA540 6/8 figure 7. clipwatt 19 mechanical data & package dimensions outline and mechanical data 7390917 a dim. mm inch min. typ. max. min. typ. max. a3.20.126 b 1.05 0.041 c 0.15 0.006 d 1.50 0.061 e 0.49 0.55 0.019 0.022 f 0.47 0.50 0.58 0.018 0.020 f1 0.1 0.004 g 0.87 1.00 1.13 0.034 0.039 0.044 g1 17.87 18.0 18.13 0.703 0.708 0.713 h1 12.0 0.480 h2 18.6 0.732 h3 19.85 0.781 l 17.9 0.704 l1 14.55 0.572 l2 10.7 11.0 11.2 0.421 0.433 0.441 l3 5.50 0.217 m 2.54 0.100 m1 2.54 0.100 clipwatt19
7/8 STA540 table 6. revision history date revision description of changes november 2004 1 first issue
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