TDA7494

TDA7494 ® 10W AMPLIFIER WITH DC VOLUME CONTROL 10W OUTPUT POWER RL = 8Ω, @ THD = 10% VCC = 28V ST-BY AND MUTE FUNCTIONS LINEAR VOLUME CONTROL DC COUPLED WITH POWER OP AMPLIFIER NO BOUCHEROT CELL NO ST-BY RC INPUT NETWORK SIGNAL LINE OUTPUT BEFORE VOLUME CONTROLLING AND MUTING 3 SWITCHABLE VOLTAGE CONTROLLED INPUT PINS SINGLE SUPPLY RANGING UP TO 35V SHORT CIRCUIT PROTECTION THERMAL OVERLOAD PROTECTION INTERNALLY FIXED GAIN SOFT CLIPPING LOW TURN-ON TURN-OFF POP NOISE MULTIWATT 15 PACKAGE BLOCK AND APPLICATION DIAGRAM 3x 470nF IN 1 ) s ( ct u d o 5 r P e 6 IN 2 IN 3 1 t e l o 30K PWR GND s b O SGN GND 30K MULTIPOWER BI50II TECHNOLOGY Multiwatt15 ) s t( ORDERING NUMBER: TDA7494 c u d o r P DESCRIPTION The TDA7494 10W is class AB power amplifier assembled in the @Multiwatt 15 package, specially designed for high quality sound, TV applications. Features of the TDA7494 include volume control, 3 switchable inputs, Stand-by and mute functions. e t le o s b O - SW 13 1 2 +VCC 14 VOL 3 PWR 470µF 30K MUTE/STBY PROTECTIONS 15 OUT 2K 8 2 100K 4 MONITOR OUT 300nF 100K 3 7 SVR 300nF 9 10 STAND-BY 470µF 10K 1µF D95AU414E SW CTL September 2003 VOL CTL MUTE 1/12 TDA7494 ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit VS DC Supply Voltage 40 V VIN Maximum Input Voltage 8 Vpp Total Power Dissipation (Tamb = 70°C) Ambient Operating Temperature Range (1) 16 -20 to +85 W °C Tstg, Tj Storage and Junction Temperature -40 to 150 °C V2, V3 Volume CTRL DC voltage (2) 7 V Ptot Tamb (1) Operation between -20 to 85 °C guaranteed by correlation with 0 to 70°C. (2) Pin 3 is ESD sensitive (max. voltage ±1.5KV) PIN CONNECTION 15 PWR GND 14 OUT 13 +VCC 12 N.C. 11 N.C. 10 MUTE c u d 9 STAND-BY 8 SGN GND 7 SVR 6 IN 2 5 IN 1 4 MONITOR OUT e t le 3 ) s t( o r P VOLUME CONTROL 2 SW CTL 1 o s b O - IN 3 D95AU415A THERMAL DATA (s) Symbol Parameter Rth j-case Rth j-amb Thermal Resistance Junction-case Thermal Resistance Junction-ambient ct u d o Value Typ = 3.8 max Unit Max = 4.8 35 °C/W °C/W ELECTRICAL CHARACTERISTICS (Refer to the test circuit, VS = 21V, RL = 8Ω; Rg = 50Ω; Tamb = 25°C; unless otherwise specified.) r P e Symbol Iq DCVOS s b O 2/12 Parameter t e l o VS Test Condition Supply Voltage Range Min. Total Quiescent Current Output DC Offset Referred to SVR Potential Typ. 11 22 No Input Signal VO Quiescent Output Voltage VS = 18V PO Output Power THD = 10%; VCC = 28V, RL = 8Ω THD = 1%; VCC = 28V -550 Max. Unit 35 V 50 mA 550 mV 7.8 9 8 6 10 8 10.2 W V THD = 10%; VCC = 21V, THD = 1%; VCC = 21V, 5 3.5 5.5 4 W THD = 10%; VCC = 21V, RL = 4Ω THD = 1%; VCC = 21V, 5 3.9 7.5 5.5 W THD = 10%; VCC = 18V, THD = 1%; VCC = 18V 4.5 3.5 6 4.5 W THD = 10%; VCC = 18V, RL = 8Ω THD = 1%; VCC = 18V 3.5 2.2 3.75 2.85 W W TDA7494 ELECTRICAL CHARACTERISTICS (continued) Symbol Parameter Test Condition THD Total Harmonic Distortion PO = 1W; f = 1KHz; Gv = 26dB Ipeak Top Output Peak Current (internally limited) Operating Temperature Min. Typ. Max. Unit 1.4 1.9 0.4 % 0 70 °C Vrms dB dB Vin GV Input Signal Closed Loop Gain Vol Ctrl > 4.5V 24.5 26 2.8 27.5 GvLine Monitor Out Gain RLOAD Mon = ∞ -3 -1.5 0 AMinVol Attenuation at Min Volume Vol Ctrl < 0.5V 80 Total Output Noise f = 20Hz to 22KHz Play, max volume BW eN SR Ri RMon Rload Mon SVR 700 MHz µV f = 20Hz to 22KHz Play, max attenuation 60 100 µV f = 20Hz to 22KHz Mute 30 50 µV 5 22.5 8 30 Monitor Output Resistance 1.4 2 30 36 od KΩ dB 60 73 dB 150 °C Monitor Output Load Supply Voltage Rejection Thermal Muting f = 1kHz; max volume CSVR = 470µA; VRIP = 1VRMS r P e t le so Ts Thermal Shut-down VST-BY VMUTE Stand-by threshold Mute Threshold Sel #1 Control Voltage Sel #2 Control Voltage Sel #3 Control Voltage IqST-BY AMUTE Quiescent Current @ Stand-by Mute Attenuation IstbyBIAS Stand-by bias current r P e bs 160 °C 1 V Input #2 selected 2.3 2.7 V Input #3 selected 4 5 V 0.6 75 1 mA dB Stand by on; VST-BY = 5V; VMUTE = 5V; 80 150 µA Play or Mute 2 20 µA 60 2.5 2.5 KΩ 0 (s) t c u 3 V V b O - 2.3 2.3 43 uc V/µs KΩ 2.7 2.7 Input #1 selected od Mute bias current Mute 1.5 10 µA Switch bias current Play Input #1 selected 0.5 -0.5 5 5 µA µA Input #2 selected Input #3 selected 1 1.5 10 20 µA µA t e l o IswitchBIAS ) s t( Slew Rate Input Resistance TM ImuteBIAS dB 0.6 350 f = 1kHz; max attenuation CSVR = 470µA; VRIP = 1VRMS O A 3/12 TDA7494 Figure 1: Test and Application Circuit. MONITOR OUT C3 470nF 13 IN 1 4 SW 5 C4 470nF 14 2 1 C5 470nF 5K 1 6 IN 2 VOL 3 C1 1000µF MUTE/STBY PROTECTIONS 15 S1 TP1 4 R2 3.3K 2 8 3 JMP1 3 7 9 R3 100K R4 100K C6 300nF 10 C7 300nF C8 470µF C9 1µF R5 10K +5V VOL P1 50K LOG +5V TP2 MUTE S2 S3 u d o r P e 4/12 uc D96AU492C d o r P e let Figure 2: P.C.B. and component layout. ) s ( ct +5V STANDBY SGN GND t e l o GND SVR 1 s b O OUT PGND +5V 2 C10 470µF PWR IN 3 R1 3.3K +VCC C2 0.1µF o s b O - ) s t( GND TDA7494 APPLICATION SUGGESTIONS The recommended values of the external components are those shown on the application circuit of figure 1. Different values can be used; the following table can help the designer. LARGER THAN SUGGESTION SMALLER THAN SUGGESTION COMPONENT SUGGESTION VALUE R1 R2 3.3KΩ 3.3KΩ R3 100KΩ R4 100KΩ R5 P1 C1 1000µF C2 100nF C3 470nF Input DC decoupling C4 470nF Input DC decoupling C5 470nF Input DC decoupling C6 300nF Input- switch time constant Larger-Input- switch time Smaller input- switch time C7 300nF Volume control time constant Larger volume regulation time Smaller volume regulation time C8 470µF Ripple Rejection Better SVR Worse SVR C9 1µF Mute time constant C10 470µF Larger mute on/off time Lower low frequency cutoff PURPOSE Input switch circuit Input switch circuit Vpin #2 shifted downward Vpin #2 shifted upward Vpin #2 shifted upward Vpin #2 shifted downward Input switch time constant Volume control time constant Larger Input Switch Time Smaller input switch time Larger Volume Regulation Time Smaller volume regulation time 10KΩ Mute time constant Larger mute on/off time Smaller mute on/off time 50KΩ Volume control circuit Supply voltage bypass Danger of oscillation Supply voltage bypass Lower low frequency cutoff Danger of oscillation Higher low frequency cutoff Lower low frequency cutoff Lower low frequency cutoff Higher low frequency cutoff Higher low frequency cutoff o r P so b O - Output DC decoupling ) s ( ct e t le c u d ) s t( Smaller mute on/off time Higher low frequency cutoff TYPICAL CHARACTERISTICS: Refer to the Application Circuit of Fig.1 VS = 21V; RL = 8Ω; f = 1KHz; RS = 8Ω; Tamb = 25°C; RS = 50Ω; unless otherwise specified u d o Figure 3: Output Power vs Supply Voltage POUT (W) r P e t e l o 14 D96AU518 d (%) VS=28V RL=8Ω s b O 12 D96AU517 Figure 4: Distortion vs Output Power 1 10 8 f=15KHz d=10% f=1KHz 6 0.1 d=1% 4 2 0 0.01 5 10 15 20 25 30 Vs(V) 0 2 4 6 8 POUT(W) 5/12 TDA7494 Figure 5: Output Power vs Supply Voltage POUT (W) D96AU519 Figure 6: Distortion vs Output Power D96AU520 d (%) 7 RL=4Ω VS=21V RL=4Ω 6 1 5 d=10% f=15KHz 4 d=1% 3 f=1KHz 0.1 2 1 0 0.01 11 13 15 17 19 0 VS(V) Figure 7: Distortion vs Frequency 2 D96AU521 d o r P e let 1 0.1 ) s t( D96AU522 POUT=1W RL=4Ω 1 o s b O 0.1 0.01 20 1K 100 o r P e ) s ( ct du f(Hz) Figure 9: Quiescent Current vs Supply Voltage IQ (mA) D96AU523 t e l o 28 bs 0.01 20 f(Hz) 1K 100 Figure 10: Quiescent Output Voltage vs Supply Voltage D96AU524 VDDC (V) 15 13 24 11 22 20 9 18 7 5 16 10 6/12 POUT(W) uc d (%) POUT=1W RL=8Ω O 6 Figure 8: Distortion vs Frequency d (%) 26 4 14 18 22 26 30 VS(V) 10 14 18 22 26 30 VS(V) TDA7494 Figure 11: Gain vs Volume Control (pin #3) Gain (dB) 20 D96AU525 Figure 12: Supply Voltage Rejection vs Frequency D96AU526 SVR (dB) VRIP=1VRMS 10 -20 0 POUT=1W -10 MAX VOLUME -40 -20 -30 -40 -60 -50 MAX ATTENUATION -60 -80 -70 -80 -100 -90 0.0 1.0 2.0 3.0 4.0 Vpin#3(V) Figure 13: Stand-by Attenuation vs Vpin # 9 ATT (dB) D96AU527 20 100 1K uc ATT (dB) D96AU528 d o r 0dB=1W 0 P e let -20 -20 -40 -80 -60 -100 (s) -120 t c u -140 0 1 2 3 d o r P e PDISS (W) bs t e l o 8 -80 -100 0 4 Vpin#9(V) Figure 15: Power Dissipation vs Output Power O o s b O -40 -60 ) s t( Figure 14: Mute Atttenuation vs Vpin # 10 0dB=1W 0 f(Hz) D96AU529 1 2 3 4 Vpin#10(V) Figure 16: Power Dissipation vs Output Power PDISS (W) D96AU530 RL=4Ω RL=8Ω 8 VS=35V VS=21V 6 6 VS=28V 4 4 VS=21V 2 0 0.1 1 VS=18V 2 10 POUT(W) 0 0.1 1 10 POUT(W) 7/12 TDA7494 MUTE STAND-BY TRUTH TABLE MUTE H L H L ST-BY H H L L OPERATING CONDITION STANDBY STANDBY MUTE PLAY Turn ON/OFF Sequences (for optimising the POP performances) A) USING MUTE AND STAND-BY FUNCTIONS VS (V) 28 ST-BY pin#9 (V) 5 c u d VSVR pin#7(V) 2.5V e t le MUTE pin#10 (V) 5 ) s ( ct INPUT (mV) ) s t( o r P o s b O - u d o VOUT (V) r P e t e l o s b O OFF STBY MUTE PLAY MUTE STBY OFF IQ (mA) D96AU531A B) USING ONLY THE MUTE FUNCTION To semplify the application, the stand-by pin can be connected directly to Ground. During the ON/OFF transitions we recommend to respect the following conditions: 8/12 - At the turn-on the transition mute to play must be made when the SVR pin is higher than 2.5V - At the turn-off the TDA7494 must be brought to mute from the play condition when the SVR pin is higher than 2.5V. TDA7494 PIN: SWITCH PINS: IN3, IN1, IN2 VS VS VS 10µA INn SWITCH 30K 100µA 10µA SVR D97AU581 D97AU582 PIN: VOLUME PIN: MONITOR VS 10µA 2K c u d VOL BUFFER PIN: SVR VS VS OUT L + u d o t e l o D97AU584 o s b O - VS ) s ( ct r P e ro P e let D97AU591 ) s t( MONITOR - 20K 6K 1K 20K 6K 1K 30K SVR s b O 30K - OUT R + 100µA D97AU585A 9/12 TDA7494 PIN: ST-BY PIN: MUTE VS 10µA STBY VS MUTE 300 10K 200 50µA D97AU586 D97AU587 PIN: OUT PINS: PW-GND, S-GND VS VS OUT c u d GND D97AU593 D97AU588 e t le ) s ( ct u d o r P e t e l o s b O 10/12 o s b O - o r P ) s t( TDA7494 mm DIM. MIN. TYP. inch MAX. MIN. TYP. A5 OUTLINE AND MECHANICAL DATA MAX. 0.197 B 2.65 0.104 C 1.6 0.063 D 1 E 0.49 0.039 0.55 0.019 0.022 F 0.66 0.75 0.026 G 1.02 1.27 1.52 0.040 0.050 0.030 0.060 G1 17.53 17.78 18.03 0.690 0.700 0.710 H1 19.6 0.772 H2 20.2 0.795 L 21.9 22.2 22.5 0.862 0.874 0.886 L1 21.7 22.1 22.5 0.854 0.87 0.886 L2 17.65 18.1 0.695 L3 17.25 17.5 17.75 0.679 0.689 0.699 L4 10.3 10.7 10.9 0.406 0.421 0.429 L7 2.65 2.9 0.104 M 4.25 4.55 4.85 0.167 0.179 0.191 M1 4.73 5.08 5.43 0.186 0.200 0.214 0.713 c u d 0.114 S 1.9 2.6 0.075 0.102 S1 1.9 2.6 0.075 0.102 Dia1 3.65 3.85 0.144 0.152 ) s ( ct ) s t( o r P Multiwatt15 (Vertical) e t le o s b O - u d o r P e t e l o s b O 0016036 J 11/12 TDA7494 c u d e t le ) s ( ct ) s t( o r P o s b O - u d o r P e t e l o s b O Information furnished is believed to be accurate and reliable. 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