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| TDA7497SA 8W+8W+15W TRIPLE AMPLIFIER PRODUCT PREVIEW 1 FEATURES 8+8W (RL = 8) + 15W ( RL = 4) 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 Figure 1. Package Clipwatt15 Table 1. Order Codes Part Number TDA7497SA Package Clipwatt15 amplifier assembled in the @ Clipwatt 15 package, specially designed for high quality sound, TV applications. Features of the TDA7497SA include mute functions independently controlled for main and center channels. 2 DESCRIPTION The TDA7497SA is a triple 8+8+15W class AB power Figure 2. Block Diagram VS_C PW_GND C1 INR 470nF S_GND 8 2 11 1 13 VS +VS C11 0.1F C10 0.1F C9 1000F + 30K OP AMP 14 C8 1000F OUTR C12 1F 10K R2 MUTE2 10K R1 C7 1F S1 MUTE2 (CENTER) 9 PW_GND_C 4 MUTE PROTECTIONS 60K C2 INL 470nF 5 10 +5V S_GND MUTE1 +5V S2 MUTE1 (L/R) + 30K OP AMP 12 OUTL C6 1000F C3 INC 470nF C4 6 + 30K OP AMP 3 OUTC C5 SVR 7 1000F 15 PW_GND 470F 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 VS Ptot Tamb Tstg, Tj DC Supply Voltage Total Power Dissipation (Tamb = 70C) Ambient Operating Temperature (1) Storage and Junction Temperature Parameter Value 35 30 0 to 70 -40 to 150 Unit V W C C (1) Operation between -20 to 85C guaranteed by correlation with 0 to 70C. Figure 3. Pin Connection (Top view) 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 PW_GND OUTR VS OUTL PW_GND MUTE1 (L/R) MUTE2 (CENTER) S_GND SVR INC INL PW_GND_C OUTC VS_C INR D02AU1413 Table 3. Thermal Data Symbol Rth j-case Rth j-amb Parameter Thermal Resistance Junction-case Thermal Resistance Junction-ambient Value Typ.=1.5 max = 2.5 max = 48 Unit C/W C/W 2/10 TDA7497SA Table 4. Electrical Characteristcs (Refer to the test circuit VS = 25V; Rg = 50; f = 1KHz; Tamb = 25C) Symbol VS Iq VO PO_L/R PO_C THD Ipeak L/R Ipeak C GV GV BW eN SR Ri SVR TM Ts Total Output Noise Slew Rate Input Resistance Supply Voltage Rejection Thermal Muting Thermal Shut-down f = 1kHzCSVR = 470mF; VRIP = 1Vrms f = 20Hz to 22KHz 5 22.5 50 Parameter Supply Voltage Range Total Quiescent Current Quiescent Output Voltage Output Power Left / RightChannels Output Power Center Channel Total Harmonic Distortion Output Peak Current Output Peak Current Central Channel Closed Loop Gain L/R Voltage GainMatching THD = 10%; RL = 8; THD = 1%; RL = 8; THD = 10%; RL = 4 THD = 1%; RL = 4 PO = 1W; f = 1KHz; (internally limited) (internally limited) 28.5 -1 0.6 60 8 30 60 150 160 150 2.0 2.5 29.5 30.5 1 11.5 6 5 12 10 Test Condition Min. 11 60 12.5 8 6 15 12 0.4 Typ. Max. 30 100 13.5 Unit V mA V W W W W % A A dB dB MHz V V/s K dB C C MUTE & INPUT SELECTION FUNCTIONS VMUTE1 Mute 1 ON threshold (L/R) Mute 1 OFF threshold (L/R) VMUTE2 Mute 2 ON threshold (center) Mute 2 OFF threshold (center) AMUTE Mute Attenuation Mute St-By 50 65 1 0.2 5 2 3.5 1.5 3.5 1.5 V V V V dB A A ImuteBIAS Mute bias currentMute1/Mute2 3/10 TDA7497SA Figure 4. PC Board and Component Layout 4/10 TDA7497SA Figure 5. Output Power vs Supply Voltage W 10 8 6 4 2 0 +10 TDA7497 Rl = 80hm f = 1KHz Figure 8. Pdiss vs Output Power Pdiss. (W)helv 16 15 14 THD=10% 13 THD=1% 12 11 TDA7497 Vcc = 26V Right/Left/Center= 8 ohm X axis is 3X Pout +12 +14 +16 +18 Vdc +20 +22 +24 +25 10 9 0 5 10 15 Pout. (W) Pout vs Vcc : RL=8ohm, F=1KHz (filter 22Hz-22KHz), THD= 1%, 10%, channels L/R/C 20 25 30 Figure 6. Frequency Response Amp. (dB) Figure 9. Output power vs Supply Voltage Pout(W) 16 15 14 13 12 +5l +4 +3 +2 +1 +0 -1 -2 -3 -4 -5 TDA7497 Vcc=25 Vdc Rl = 8ohm 0dB = 1W TDA7497SA Rl= 4ohm f =1KHz Center Ch THD=10% 11 10 9 8 7 6 5 4 3 2 1 THD=1% 20 50 100 200 500 1k 2k 5k 10k 20k 50k 100k +14 +16 +18 +20 Vs ( V ) +22 +24 +26 Frequency ( Hz ) Figure 7. THD+N vs Output Power T.H.D. (% ) Figure 10. THD+N vs Output Power THD(%) 10 5 TDA7497SA 2 Rl = 4ohm Center Ch 10 5 2 1 0.5 0.2 0.1 0.05 0.02 0.01 60m 100m 200m 500m 1 2 5 10 TDA7497 Vcc=26Vdc Rl = 8ohm f = 1KHz 1 0.5 0.2 0.1 0.05 f =100Hz f =1KHz 0.02 0.01 200m 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 = 150C, 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 = 2.5C/W , Tamb max = 50C V cc Pdmax = (N channels) * ----------------------------- + I q V cc 2 2 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 = 3.3C/W P d max 17 In figure 6 is shown the Power derating curve for the device. Figure 11. Power Derating Curve 2 35 30 25 Pd (W) 20 (c) 15 10 5 0 0 40 80 Tamb (C) 120 160 (d) (b) a) b) c) d) Infinite Heatsink 1.5 C/ W 3.0 C/ W 5.0 C/ W (a) 6/10 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 DIM. MIN. A B C D E F G G1 H1 H2 H3 L L1 L2 L3 M M1 10.7 19.85 17.9 14.55 11 5.5 2.54 2.54 11.2 0.421 0.49 0.67 1.14 17.57 1.27 17.78 12 18.6 0.781 0.704 0.572 0.433 0.217 0.100 0.100 0.441 0.15 1.50 0.55 0.73 1.4 17.91 0.019 0.026 0.045 0.692 0.050 0.700 0.480 0.732 TYP. MAX. 3.2 1.05 0.006 0.061 0.022 0.029 0.055 0.705 MIN. TYP. MAX. 0.126 0.041 Weight: 1.92gr inch OUTLINE AND MECHANICAL DATA Clipwatt15 0044538 G 8/10 TDA7497SA Table 1. Revision History Date September 2003 November 2004 February 13, 2005 Revision 1 2 3 First Issue in EDOCS Changed Style Sheet and add. figs. 9 and 10 Modified fig 2 in pag 1. and VMUTE in table 4 Description of Changes 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 (c) 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 |
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