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| TDA7297D 10W+10W DUAL BRIDGE AMPLIFIER 1 FEATURES TECHNOLOGY BI20II WIDE SUPPLY VOLTAGE RANGE (6.5 - 18V) OUTPUT POWER 10+10W @ THD = 10%, RL = 8, VCC = 13V MINIMUM EXTERNAL COMPONENTS - NO SVR CAPACITOR - NO BOOTSTRAP - NO BOUCHEROT CELLS - INTERNALLY FIXED GAIN STAND-BY & MUTE FUNCTIONS SHORT CIRCUIT PROTECTION THERMAL OVERLOAD PROTECTIONE Figure 1. Package PowerSO20 (SLUG UP) Table 1. Order Codes Part Number TDA7297D Package PowerSO20 (SLUG UP) 2 DESCRIPTION The TDA7297D is a dual bridge amplifier specially designed for Home Audio, Plasma TV, LCD TV applications. Figure 2. TEST AND APPLICATION CIRCUIT VCC JP1 R1 47K R2 47K IN1 S-GND R3 10K 9 C4 10F Vref C5 0.22F IN2 MUTE R4 10K 8 C6 1F 1 10 11 PW-GND 20 + D02AU1407 +5V C3 0.22F 6 7 + 13 15 2 C1 470F OUT1+ C2 100nF C7 100nF ST-BY + + - 5 OUT1- 14 19 OUT2+ 16 OUT2- May 2004 REV. 1 1/11 TDA7297D Table 2. Absolute Maximum Ratings Symbol Vs IO Ptot Top Tstg, Tj Supply Voltage Output Peak Current (internally limited) Total Power Dissipation (Tamb = 70C Operating Temperature Storage and Junction Temperature Parameter Value 20 2 33 0 to 70 -40 to 150 Unit V A W C C Table 3. Thermal Data Symbol Rth j-case Parameter Thermal Resistance Junction-case Value 2.1 Unit C/W Figure 3. PIN CONNECTION PW GND OUT2+ N.C. N.C. OUT2VCC IN2SGND N.C. PW GND 20 19 18 17 16 15 14 13 12 11 D02AU1408 1 2 3 4 5 6 7 8 9 10 PW GND OUT1+ N.C. N.C. OUT1VCC IN1 MUTE ST BY PW GND 2/11 TDA7297D Table 4. Electrical Characteristcs (VCC = 13V, RL = 8, f = 1KHz, Tamb = 25C unless otherwise specified) Symbol VCC Iq VOS PO THD Parameter Supply Range Total Quiescent Current Output Offset Voltage Output Power Total Harmonic Distortion THD 10% PO = 1W PO = 0.1W to 5W f = 100Hz to 15KHz SVR CT AMUTE Tw GV GV Ri VTMUTE VTST-BY IST-BY eN Supply Voltage Rejection Crosstalk Mute Attenuation Thermal Threshold Closed Loop Voltage Gain Voltage Gain Matching Input Resistance Mute Threshold St-by Threshold St-by Current Total Output Noise Voltage A Curve f = 20Hz to 20KHz 150 220 Vo = -30dB 25 2.3 0.8 30 2.9 1.3 4.1 1.8 100 500 31 f = 100Hz, VR =0.5V 40 46 60 56 60 80 150 32 33 0.5 8.3 10 0.1 0.3 1 RL = Test Condition Min. 6.5 50 Typ. Max. 18 65 120 Unit V mA mV W % % dB dB dB C dB dB K V V A V V 3 APPLICATIVE SUGGESTIONS STAND-BY AND MUTE FUNCTIONS 3.1 Microprocessor Application In order to avoid annoying "Pop-Noise" during Turn-On/Off transients, it is necessary to guarantee the right Stby and mute signals sequence.It is quite simple to obtain this function using a microprocessor (Fig. 4 and 5). At first St-by signal (from P) goes high and the voltage across the St-by terminal (Pin 9) starts to increase exponentially. The external RC network is intended to turn-on slowly the biasing circuits of the amplifier, this to avoid "POP" and "CLICK" on the outputs. When this voltage reaches the St-by threshold level, the amplifier is switched-on and the external capacitors in series to the input terminals (C1, C3) start to charge. It's necessary to mantain the mute signal low until the capacitors are fully charged, this to avoid that the device goes in play mode causing a loud "Pop Noise" on the speakers. A delay of 100-200ms between St-by and mute signals is suitable for a proper operation. 3/11 TDA7297D Figure 4. Microprocessor Application VCC C1 0.22F IN1 ST-BY R1 10K C2 10F C5 470F OUT1+ C6 100nF 7 6 + - 15 2 9 P S-GND 13 Vref + + 8 19 OUT2+ 5 OUT1- C3 0.22F IN2 MUTE R2 10K C4 1F 14 1 10 11 PW-GND 20 + D02AU1409 16 OUT2- Figure 5. Microprocessor Driving Signals +VS(V) +13V VIN (mV) VST-BY pin 9 1.8 1.3 0.8 VMUTE pin 8 4.1 2.9 2.3 Iq (mA) VOUT (V) OFF ST-BY PLAY MUTE MUTE ST-BY OFF D02AU1411-Mod 4/11 TDA7297D Figure 6. THD+N vs Output Power THD(%) 10 5 4 .00 0 0 Figure 9. Frequency Response L evel(d B r) 5 .00 0 0 2 1 0.5 f=5KHz 0.2 0.1 0.05 f=1KHz 0.02 0.01 100m 200m 500m 1 Vcc=13V Rl= 8ohm F=1KHz 3 .00 0 0 2 .00 0 0 1 .00 0 0 0 .0 -1 .00 0 -2 .00 0 -3 .00 0 -4 .00 0 V c c = 1 6 .5 V R l = 8 ohm Pou t = 1W 2 5 10 20 -5 .00 0 10 100 1k 10k 100k 2 x Pout (W) freq uency (H z) Figure 7. THD+N vs Output Power THD(%) 10 5 2 1 0.5 f=5KHz Vcc=11V Rl= 8ohm F=1KHz Figure 10. Output Power vs supply Voltage 16 14 12 10 Po(W) 8 6 4 2 Rl =8ohm F=1KHz 0.2 0.1 0.05 f=1KHz d=10% d=1% 0.02 0.01 100m 200m 500m 1 2x Pout (W) 2 5 10 0 6 7 8 9 10 11 Vs (V) 12 13 14 15 16 Figure 8. THD+N vs Frequency THD(%) 10 5 2 1 0.5 0.2 0.1 0.05 0.02 0.01 20 50 100 200 500 1k 2k 5k 10k Frequency (Hz) Vcc=13V Rl= 8ohm Figure 11. Power Dissipation vs Pout Pdiss(W) Po = 5W 11 10 9 8 7 6 5 4 3 2 1 0 0 1 2 3 4 5 Vcc=13V Rl = 8 ohm F=1KHz 6 7 8 9 10 11 2xPout(W) 5/11 TDA7297D Figure 12. Mute Attenuation vs. Vpin 8t Attenuation (dB) 10 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 1 1.5 2 2.5 3 3.5 4 4.5 5 30 6 7 8 9 10 11 12 13 14 15 16 17 18 65 60 55 50 45 40 35 Figure 14. Quiescent Curent vs. Supply Voltage Iq (mA) 70 Vpin.6(V) Vsupply(V) Figure 13. Standard-By Attenuation vs Vpin. 9 Attenuation (dB) 10 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 -110 -120 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 2.4 Vpin.7 (V) 6/11 TDA7297D Figure 15. PC Board Component Layout Sign GND Figure 16. Evaluation Board Top Layer Layout 7/11 TDA7297D Figure 17. Evaluation Board Bottom Layer Layout 8/11 TDA7297D Figure 18. PowerSO20 (SLUG UP) Mechanical Data & Package Dimensions DIM. A A2 A4 A5 a1 b c D (1) D1 D2 E E1 (1) E2 E3 e e3 G H h L N R S V mm TYP. 3.15 0.2 inch TYP. MIN. 3.25 3 0.8 0.15 0.030 0.4 0.23 15.8 9.4 13.9 10.9 5.8 1.12 0 15.5 0.8 MAX. 3.5 3.3 1 0.25 -0.040 0.53 0.32 16 9.8 14.5 11.1 2.9 6.2 1.42 MIN. 0.128 0.118 0.031 0.006 0.0012 0.016 0.009 0.622 0.370 0.547 0.429 0.228 0.044 1 1.27 11.43 0.1 0 15.9 0.61 1.1 1.1 0.031 10 (max) 0.6 0 (min.) 8 (max.) 5 (min.) 7 (max.) MAX. 0.138 0.124 0.130 0.039 0.008 0.010 -0.0016 0.021 0.012 0.630 0.385 0.039 0.570 0.437 0.114 0.244 0.050 0.056 0.450 0.004 0.625 0.043 0.043 0.024 OUTLINE AND MECHANICAL DATA (1) OD a E1Odo not include mold flash or protusions. nd - Mold flash or protusions shall not exceed 0.15mm (0.006O) - Critical dimensions: O O EO, a1O,OeO OG and O. PowerSO20 (SLUG UP) N N H A5 E3 A2 A R A4 c V b e3 h x 45u e D2 (x2) DETAIL A E2 E M 1 10 DETAIL A E2 E1 0.35 Gage Plane a1 S L -CSEATING PLANE G C 20 D1 (COPLANARITY) 11 PSO20DME D 0088529 C 9/11 TDA7297D Table 5. Revision History Date May 2004 Revision 1 First Issue Description of Changes 10/11 TDA7297D 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) 2004 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 www.st.com 11/11 |
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