TDA7494S ® 10W AMPLIFIER 10W OUTPUT POWER RL = 8Ω, @ THD = 10% VCC = 28V ST-BY AND MUTE FUNCTIONS NO BOUCHEROT CELL NO ST-BY RC INPUT NETWORK 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 MULTIPOWER BI50II TECHNOLOGY Multiwatt15 ORDERING NUMBER: TDA7494S cially designed for high quality sound, TV applications. Features of the TDA7494S include Stand-by and mute functions. DESCRIPTION The TDA7494S 10W is class AB power amplifier assembled in the @Multiwatt 15 package, spe- BLOCK AND APPLICATION DIAGRAM 13 470nF IN 1 1 +VCC 14 PWR 470µF 30K PWR GND SGN GND MUTE/STBY PROTECTIONS OUT 15 8 7 SVR 9 10 STAND-BY 470µF 10K 1µF D99AU1012 MUTE December 1999 1/12 TDA7494S 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 Storage and Junction Temperature -40 to 150 °C Ptot Tamb Tstg, Tj (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 9 STAND-BY 8 SGN GND 7 SVR 6 N.C. 5 N.C. 4 N.C. 3 N.C. 2 N.C. 1 IN 1 D99AU1014 THERMAL DATA Symbol Parameter Rth j-case Rth j-amb Thermal Resistance Junction-case Thermal Resistance Junction-ambient 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.) Symbol Supply Voltage Range Iq Total Quiescent Current DCVOS 2/12 Parameter VS Output DC Offset Referred to SVR Potential Test Condition Min. 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 6.6 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 TDA7494S ELECTRICAL CHARACTERISTICS (continued) Symbol Parameter Test Condition THD Total Harmonic Distortion PO = 1W; f = 1KHz; Gv = 26dB Ipeak Top Output Peak Current (internally limited) Vin GV Operating Temperature Input Signal Closed Loop Gain Vol Ctrl > 4.5V Min. Typ. Max. Unit 1.4 1.9 0.4 % 0 70 °C 24.5 2.8 27.5 Vrms dB BW eN 0.6 Total Output Noise SR Slew Rate Ri Input Resistance SVR 26 A Supply Voltage Rejection MHz f = 20Hz to 22KHz Play 30 50 µV f = 20Hz to 22KHz Mute 30 50 µV f = 1kHz; CSVR = 470µA; VRIP = 1VRMS 5 8 V/µs 22.5 30 KΩ 36 43 dB 150 160 °C °C TM Ts Thermal Muting Thermal Shut-down VST-BY Stand-by threshold 2.3 2.5 2.7 V VMUTE IqST-BY Mute Threshold Quiescent Current @ Stand-by 2.3 2.5 0.6 2.7 1 V mA AMUTE IstbyBIAS Mute Attenuation 60 75 ImuteBIAS Mute bias current Stand-by bias current dB Stand by on; VST-BY = 5V; VMUTE = 5V; 80 150 µA Play or Mute Mute 2 1.5 20 10 µA µA Play 0.5 5 µA 3/12 TDA7494S Figure 1: Test and Application Circuit. 13 C4 470nF IN 1 +VCC C2 0.1µF 14 OUT PWR 1 C10 470µF MUTE/STBY PROTECTIONS 15 8 7 9 PGND C1 1000µF GND 10 SVR C8 470µF C9 1µF R5 10K +5V MUTE S2 +5V S3 STANDBY SGN GND Figure 2: P.C.B. and component layout. 4/12 GND D99AU1013 TDA7494S 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. COMPONENT SUGGESTION VALUE LARGER THAN SUGGESTION PURPOSE R5 10KΩ C1 1000µF Mute time constant Supply voltage bypass C2 100nF Supply voltage bypass Larger mute on/off time C5 470nF Input DC decoupling C8 470µF Ripple Rejection Better SVR C9 1µF 470µF Smaller mute on/off time Danger of oscillation Lower low frequency cutoff C10 SMALLER THAN SUGGESTION Danger of oscillation Higher low frequency cutoff Worse SVR Mute time constant Larger mute on/off time Smaller mute on/off time Output DC decoupling Lower low frequency cutoff 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 Figure 3: Output Power vs Supply Voltage POUT (W) Figure 4: Distortion vs Output Power D96AU517 D96AU518 d (%) 14 VS=28V RL=8Ω 12 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 TDA7494S 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 POUT(W) D96AU522 d (%) POUT=1W RL=8Ω POUT=1W RL=4Ω 1 1 0.1 0.1 f(Hz) 1K 100 6 Figure 8: Distortion vs Frequency d (%) 0.01 20 4 Figure 9: Quiescent Current vs Supply Voltage IQ (mA) D96AU523 0.01 20 f(Hz) 1K 100 Figure 10: Quiescent Output Voltage vs Supply Voltage D96AU524 VDDC (V) 28 15 26 13 24 11 22 20 9 18 7 5 16 10 6/12 14 18 22 26 30 VS(V) 10 14 18 22 26 30 VS(V) TDA7494S Figure 11: Stand-by Attenuation vs Vpin # 9 ATT (dB) D96AU527 Figure 12: Mute Atttenuation vs Vpin # 10 ATT (dB) D96AU528 0dB=1W 0 0dB=1W 0 -20 -20 -40 -40 -60 -80 -60 -100 -80 -120 -100 -140 0 1 2 3 Figure 13: Power Dissipation vs Output Power PDISS (W) 0 4 Vpin#9(V) D96AU529 1 2 3 4 Vpin#10(V) Figure 14: Power Dissipation vs Output Power PDISS (W) D96AU530 RL=4Ω RL=8Ω 8 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 TDA7494S 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 VSVR pin#7(V) 2.5V MUTE pin#10 (V) 5 INPUT (mV) VOUT (V) 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 TDA7494S must be brought to mute from the play condition when the SVR pin is higher than 2.5V. TDA7494S PINS: IN1 VS INn 30K 100µA SVR D97AU581 PIN: SVR VS VS VS OUT L + - 20K 6K 1K 20K 6K 1K 30K SVR 30K - OUT R + 100µA D97AU585A 9/12 TDA7494S PIN: ST-BY PIN: MUTE VS 10µA STBY VS MUTE 300 10K 200 50µA D97AU586 PIN: OUT D97AU587 PINS: PW-GND, S-GND VS VS OUT GND D97AU593 D97AU588 10/12 TDA7494S mm DIM. MIN. TYP. inch MAX. MIN. TYP. MAX. A 5 0.197 B 2.65 0.104 C 1.6 D OUTLINE AND MECHANICAL DATA 0.063 1 0.039 E 0.49 0.55 0.019 0.022 F 0.66 0.75 0.026 0.030 G 1.02 1.27 1.52 0.040 0.050 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 0.870 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 0.713 L7 2.65 2.9 0.104 M 4.25 4.55 4.85 0.167 0.179 0.191 0.114 M1 4.63 5.08 5.53 0.182 0.200 0.218 S 1.9 2.6 0.075 S1 1.9 2.6 0.075 0.102 0.102 Dia1 3.65 3.85 0.144 0.152 Multiwatt15 V 11/12 TDA7494S Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics © 1999 STMicroelectronics – Printed in Italy – All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy - Japan - Malaysia - Malta - Morocco Singapore - Spain - Sweden - Switzerland - United Kingdom - U.S.A. http://www.st.com 12/12