TDA7497SA 8W+8W+15W TRIPLE AMPLIFIER PRODUCT PREVIEW 1 ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ 2 FEATURES Figure 1. Package 8+8W (RL = 8Ω) + 15W ( RL = 4Ω) OUTPUT POWER @THD = 10%, Vcc = 25V INDEPENDENT MUTE FOR CENTER CHANNEL AND MAIN CHANNELS NO TURN-ON TURN-OFF POP NOISE NO BOUCHEROT CELL SINGLE SUPPLY RANGING UP TO 35V SHORT CIRCUIT PROTECTION THERMAL OVERLOAD PROTECTION INTERNALLY FIXED GAIN SOFT CLIPPING CLIPWATT 15 PACKAGE Clipwatt15 Table 1. Order Codes Part Number Package TDA7497SA Clipwatt15 amplifier assembled in the @ Clipwatt 15 package, specially designed for high quality sound, TV applications. DESCRIPTION The TDA7497SA is a triple 8+8+15W class AB power Features of the TDA7497SA include mute functions independently controlled for main and center channels. Figure 2. Block Diagram +VS VS_C PW_GND C1 2 13 11 1 INR 470nF S_GND + 30K 8 14 - C11 0.1µF VS C8 1000µF C12 1µF 60K C2 5 INL 470nF 30K C3 6 INC 470nF C4 470µF + SVR 7 10 12 - 10K R1 MUTE1 C7 1µF +5V S_GND +5V S2 MUTE1 (L/R) OUTL C6 1000µF OP AMP 3 + 30K S1 MUTE2 (CENTER) 10K R2 MUTE2 MUTE PROTECTIONS 4 C10 0.1µF OUTR OP AMP 9 PW_GND_C C9 1000µF - OUTC C5 1000µF OP AMP 15 PW_GND D98AU961B February 2005 This is preliminary information on a new product now in development. Details are subject to change without notice. Rev. 3 1/10 TDA7497SA Table 2. Absolute Maximum Ratings Symbol Parameter Value Unit VS DC Supply Voltage 35 V Ptot Total Power Dissipation (Tamb = 70°C) 30 W Tamb Ambient Operating Temperature (1) 0 to 70 °C Tstg, Tj Storage and Junction Temperature -40 to 150 °C (1) Operation between -20 to 85°C guaranteed by correlation with 0 to 70°C. Figure 3. Pin Connection (Top view) 15 PW_GND 14 OUTR 13 VS 12 OUTL 11 PW_GND 10 MUTE1 (L/R) 9 MUTE2 (CENTER) 8 S_GND 7 SVR 6 INC 5 INL 4 PW_GND_C 3 OUTC 2 VS_C 1 INR D02AU1413 Table 3. Thermal Data Symbol Parameter Rth j-case Thermal Resistance Junction-case Rth j-amb Thermal Resistance Junction-ambient 2/10 Value Unit Typ.=1.5 max = 2.5 °C/W max = 48 °C/W TDA7497SA Table 4. Electrical Characteristcs (Refer to the test circuit VS = 25V; Rg = 50Ω; f = 1KHz; Tamb = 25°C) Symbol Parameter VS Supply Voltage Range Iq Total Quiescent Current VO Quiescent Output Voltage Test Condition Min. Typ. Max. Unit 30 V 60 100 mA 11.5 12.5 13.5 V 11 Output Power Left / RightChannels THD = 10%; RL = 8Ω; THD = 1%; RL = 8Ω; 6 5 8 6 W W PO_C Output Power Center Channel THD = 10%; RL = 4Ω THD = 1%; RL = 4Ω 12 10 15 12 W W THD Total Harmonic Distortion PO = 1W; f = 1KHz; Output Peak Current (internally limited) 2.0 A Output Peak Current Central Channel (internally limited) 2.5 A PO_L/R Ipeak L/R Ipeak C GV ∆GV Closed Loop Gain 0.4 28.5 L/R Voltage GainMatching -1 BW 30.5 dB 1 dB 0.6 eN Total Output Noise SR Slew Rate Ri Input Resistance SVR 29.5 Supply Voltage Rejection f = 20Hz to 22KHz f = 1kHzCSVR = 470mF; VRIP = 1Vrms 60 % MHz 150 µV 5 8 V/µs 22.5 30 KΩ 50 60 dB TM Thermal Muting 150 °C Ts Thermal Shut-down 160 °C MUTE & INPUT SELECTION FUNCTIONS VMUTE1 Mute 1 ON threshold (L/R) 3.5 V Mute 1 OFF threshold (L/R) VMUTE2 1.5 Mute 2 ON threshold (center) 3.5 V Mute 2 OFF threshold (center) AMUTE 1.5 Mute Attenuation ImuteBIAS Mute bias currentMute1/Mute2 50 V 65 V dB Mute 1 5 µA St-By 0.2 2 µA 3/10 TDA7497SA Figure 4. PC Board and Component Layout 4/10 TDA7497SA Figure 8. Pdiss vs Output Power Figure 5. Output Power vs Supply Voltage Pdiss. (W)helv W 16 10 TDA7497 Rl = 80hm f = 1KHz 8 15 14 THD=10% 6 13 4 TDA7497 Vcc = 26V Right/Left/Center= 8 ohm X axis is 3X Pout 12 THD=1% 2 11 0 +10 +12 +14 +16 +18 Vdc +20 +22 +24 +25 10 9 Pout vs Vcc : RL=8ohm, F=1KHz (filter 22Hz-22KHz), THD= 1%, 10%, channels L/R/C 0 5 10 15 20 25 30 Pout. (W) Figure 9. Output power vs Supply Voltage Figure 6. Frequency Response Pout(W) Amp. (dB) 16 15 +5l 14 +4 +3 TDA7497 Vcc=25 Vdc Rl = 8ohm 0dB = 1W +2 +1 13 TDA7497SA 12 Rl= 4ohm 11 f =1KHz 10 Center Ch THD=10% 9 8 +0 7 6 -1 THD=1% 5 -2 4 -3 3 -4 2 1 -5 20 50 100 200 500 1k 2k 5k 10k 20k 50k 100k +14 +16 +18 Frequency ( Hz ) +22 +24 +26 Figure 10. THD+N vs Output Power Figure 7. THD+N vs Output Power THD(%) 10 T.H.D. (%) 10 5 5 TDA7497SA 2 2 1 1 TDA7497 Vcc=26Vdc Rl = 8ohm f = 1KHz 0.5 0.2 0.05 0.05 0.02 0.02 200m Center Ch 0.2 0.1 60m 100m Rl = 4ohm 0.5 0.1 0.01 +20 Vs ( V ) 500m 1 2 5 10 0.01 200m f =100Hz f =1KHz 500m 1 2 5 10 20 5/10 TDA7497SA 3 HEAT SINK DIMENSIONING: In order to avoid the thermal protection intervention, that is placed approximatively at Tj = 150°C, it is important the dimensioning of the Heat Sinker RTh (°C/W). The parameters that influence the dimensioning are: – Maximum dissipated power for the device (Pdmax) – Max thermal resistance Junction to case (RTh j-c) – Max. ambient temperature Tamb max – Quiescent current Iq (mA) 3.1 Example: VCC = 28V, Rload = 8ohm (left/right), Rload = 4ohm (centre), RTh j-c = 2.5°C/W , Tamb max = 50°C 2 V cc Pdmax = (N° channels) · ------------------------------ + I q ⋅ V cc 2 2Π ⋅ R load Pdmax = 2 · ( 3.95 ) + 1 · ( 7.9 ) + 1.2 = 17W 150 – T amb max 150 – 50 (Heat Sinker) R Th c-a = ----------------------------------------- – R Th j-c = ---------------------- – 2.5 = 3.3°C/W P d max 17 In figure 6 is shown the Power derating curve for the device. Figure 11. Power Derating Curve 35 30 Pd (W) 25 (a) 20 (c) (b) 15 (d) 10 5 0 0 6/10 40 80 Tamb (°C) 120 160 a) Infinite Heatsink b) 1.5 °C/ W c) 3.0 °C/ W d) 5.0 °C/ W TDA7497SA 3.2 Clipwatt Assembling Suggestions The suggested mounting method of Clipwatt on external heat sink, requires the use of a clip placed as much as possible in the plastic body center, as indicated in the example of figure 7. A thermal grease can be used in order to reduce the additional thermal resistance of the contact between package and heatsink. A pressing force of 7 - 10 Kg gives a good contact and the clip must be designed in order to avoid a maximum contact pressure of 15 Kg/mm2 between it and the plastic body case. As example , if a 15Kg force is applied by the clip on the package , the clip must have a contact area of 1mm2 at least. Figure 12. Example of Right Placement of the Clip 7/10 TDA7497SA Figure 1. Clipwatt15 Mechanical Data & Package Dimensions mm inch DIM. MIN. TYP. MAX. MIN. TYP. MAX. A 3.2 0.126 B 1.05 0.041 C 0.15 0.006 D 1.50 0.061 Weight: 1.92gr E 0.49 0.55 0.019 0.022 F 0.67 0.73 0.026 0.029 G 1.14 1.27 1.4 0.045 0.050 0.055 G1 17.57 17.78 17.91 0.692 0.700 0.705 H1 12 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 OUTLINE AND MECHANICAL DATA 11 11.2 0.421 0.433 L3 5.5 0.217 M 2.54 0.100 M1 2.54 0.100 0.441 Clipwatt15 0044538 G 8/10 TDA7497SA Table 1. Revision History Date Revision Description of Changes September 2003 1 First Issue in EDOCS November 2004 2 Changed Style Sheet and add. figs. 9 and 10 February 13, 2005 3 Modified fig 2 in pag 1. and VMUTE in table 4 9/10 TDA7497SA 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. Specifications 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. All other names are the property of their respective owners © 2005 STMicroelectronics - All rights reserved STMicroelectronics group of companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America www.st.com 10/10