TDA7490L ® 15W + 15W STEREO CLASS-D AMPLIFIER 28W MONO IN BTL 15W + 15W OUTPUT POWER: RL = 8Ω/4Ω; THD = 10% HIGH EFFICIENCY WIDE SUPPLY VOLTAGE RANGE (FROM ±10 TO ±25V) SPLIT SUPPLY TURN OFF/ON POP FREE ST-BY AND MUTE FEATURES SHORT CIRCUIT PROTECTION ACROSS THE LOAD THERMAL OVERLOAD PROTECTION EXTERNALLY SINCHRONIZABLE BRIDGE CONFIGURATION Flexiwatt 25 ORDERING NUMBER: TDA7490L DESCRIPTION The TDA7490L is a dual audio class D amplifier assembled in Flexiwatt 25 package; it is specially designed for high efficiency application mainly for TV and Home Stereo sets. Figure 1. Test and application circuit. (Stereo Configuration) R1 10K R17 52.3K MUTE STBY R2 30K R3 10K R21 4.7K C26 470pF C25 470pF 7 6 INPUT1 9 10 PREAMPLIFIER1 C23 2200µF 14 +VCC C22 100nF 2 C21 2200µF R15 100 5 INTEGRATOR1 3 12 C3 100nF -VCC L1 30µ C18 330pF OUT1 C10 220nF 8 OSC EXT_CK C17 24pF 1 C7 100nF -VCC C19 560pF R14 22K 16 R1 10K C20 33nF 11 13 C4 100nF -VCC 4 PWM-stage1 G=2.5 C2 1nF -VCC R4 130K R20 68K C27 2.2µF C1 330nF +VCC 15 R13 10K C16 330pF 25 R 6.8 C5 330nF INPUT2 C6 1nF PREAMPLIFIER2 18 PWM-stage2 G=2.5 19 R5 4.7K 23 INTEGRATOR2 17 21 20 24 22 L2 30µ R12 22K C15 560pF C14 33nF OUT2 C29 220nF R11 100 C8 470pF -VCC R6 68K C9 470pF C28 2200µF -VCC C11 100nF C12 2200µF +VCC D98AU978A R9 52.3K March 2001 1/9 TDA7490L Figure 2. Test and application circuit. (Bridge Configuration) 470pF C40 C41 R4 68K 7 INPUT R5 52.3K 470pF The LC filter is optimized for 8Ω (<->LC filter for 4Ω in single-ended) It hos to be changed for other loads 9 - 10 PRE L9 30µ Int. PWM-stage + 3 C23 235nF C26 470nF dumping (common mode) R27 10 R63 4.7K C24 235nF 18 PRE + PWM-stage Int. 23 - 19 470pF C60 R61 68K R25 Rload R28 10 C29 470nF L10 30µ 17 470pF C59 R62 52.3K D99AU1081 ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit VCC DC Supply Voltage (no signal) ±30 V Ptot Tstg, Tj Power Dissipation Tcase = 70°C 35 W Top V6,8,10,18 Storage and Junction Temperature –40 to 150 °C 0 to 70 °C V Operating Temperature Range Maximum Voltage on pins # 6,8,10,18 referred to GND ±5 THERMAL DATA Symbol Rth j-case 2/9 Parameter Thermal Resistance Junction-case Typ. 1 Max. Unit °C/W TDA7490L PIN CONNECTION (Top view) Vreg -VCC +VCC OUT2 N.C. BOOT2 IN2 FEED4 FEED3 T2 -5V GND CURREF T1 +5V IN1 OSC FEED2 FEED1 STBY-MUTE +VCC BOOT1 -VCC 25 OUT1 -VCC 1 D97AU816B PIN FUNCTIONS N. Name 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 -VCC sign/sub -VCCpow1 out 1 +VCCpow1 BOOT1 STBY-MUTE FEED1 OSC FEED2 IN1 T1 +5V GND CURREF T2 -5V FEED3 IN2 FEED4 NC BOOT2 +VCCpow2 OUT2 -VCCpow2 Vreg Function Negative signal/substrate supply Negative power supply CH1 PWM output of CH1 Positive power supply CH1 Bootstrap CH1 Control State Pin Feedback pin 1 CH1 Master Oscillator Setting Freequency Pin (or external sync.) Feedback pin2 CH1 Input CH1 Triangular waveform CH1 +5V regulator (only for internal purposes) Signal ground Setting current resistor Triangular waveform CH2 -5V regulator (only for internal purposes) Feedback pin1 CH2 Input CH2 Feedback pin2 CH2 Not connected Bootstrap CH2 Positive power supply CH2 PWM output of CH2 Negative power supply CH2 10V regulator 3/9 TDA7490L ELECTRICAL CHARACTERISTICS (Refer to the test circuit, VCC = ±17V; RL = 8Ω; Demod. filter L = 30mH, C = 220nF; f = 1KHz; fsw = 200kHz; Tamb = 25°‘C unless otherwise specified.) Symbol Parameter Test Condition Supply Range Iq VOS Total Quiescent Current PO Output Power THD = 10% THD = 1% Output Power in Bridge Configuration PO(BTL) PO (1) Min. Typ. ±10 VS RL = ∞ no LC filter Output Offset Voltage 70 –150 12 10 Unit ±25 V 120 mA +150 mV 15 12 W W Vs =±17V; RL = 16Ω THD = 10% THD = 1% 28 22.5 W W Vs =±13V; RL = 8Ω THD = 10% THD = 1% 28 22.5 W W 15 12 W W RL = 4Ω VCC = ±13V THD = 10% THD = 1% Output Power Max. PD Maximum Dissipated Power VCC = ±17V; RL = 8Ω PO = 15W + 15W; THD = 10% 4 W η Efficiency (*) PO = 15W + 15W 86 % Total Harmonic Distortion Overcurrent Protection Threshold RL = 8Ω; PO = 1W RL = 0 0.1 % 5 A 150 °C THD Imax 3.5 Tj Thermal Shut-down Junction Temperature GV Closed Loop Gain 29 ∆GV (3) eN Gain Matching Total Input Noise RG = 50Ω -1 A Curve f = 20Hz to 22KHz 7 12 µV µV Cross talk f = 1KHz, PO = 1W 55 dB 30 kΩ CT Ri Input Resistance SVR Supply Voltage Rejection Vrmax Tr, Tf Overvoltage Threshold (5) Rising and Falling Time RDSON FSW (4) 20 f = 100Hz; Vr = 0.5 30 dB dB 60 55 50 Power Transistor on Resistance Switching Frequency Range 31 +1 100 dB 60 70 V ns 0.4 0.8 200 230 Ω KHz MUTE & STAND-BY FUNCTIONS VST-BY Stand-by range 0 0.7 V VMUTE Mute Range 1.7 2.5 V VPLAY AMUTE Play Range Mute Attenuation 4 55 5 V dB IqST-BY Quiescent Current @ Stand-by 5 mA *: PO = measured across the load using the following inductor: COIL58120 MPPA 2 (magnectics) TURNS = 20 ø 1mm (1) L = 15µH, C = 470nF (3) ∆Gv is intended with R2, R17, R5, R9 1% precision (4) FSW = 0.25 ⋅ (1/(300ns + R13 ⋅ ( C17 + 76pF) ⋅ 0.85) (5) VRMAX = (+VCC) - (-VCC) when VR ≥VRMAX the device goes in Stand-By mode 4/9 60 3 TDA7490L Figure 3. P.C. Board and component layout of the Figs. 1, 2. (for Stereo and Bridge compatible configuration) C O M P O N E N T S I D E S O L D E R S I D E 5/9 TDA7490L Figure 4. Distortion vs. Output Power Figure 5. Distortion vs. Output Power 5 5 Stereo VS ± 17V; Rl=8Ω; f=1KHz 2 1 0.5 0.5 0.2 0.2 0.1 0.1 0.05 0.05 0.02 0.02 0 2 4 6 8 10 12 14 PO(W) Figure 6. Crosstalk vs. Frequency 0.01 0 2 4 6 8 10 12 14 PO(W) Figure 7. Frequency Response D99AU1102 CT (dB) VS ± 17V; Rl=8Ω; 0dB=1W -20 Stereo VS ± 13V; Rl=4Ω; f=1KHz 2 1 0.01 D99AU1084 THD (%) D99AU1086 THD (%) AMP (dB) D99AU1103 2 0 -30 -2 -40 VS= ±17V; Rl= 8Ω; 0dB= 1W -4 -50 -6 -60 -70 -8 -80 -10 -90 -12 -100 0.001 0.01 0.1 1 f(KHz) Figure 8. Power Dissipation vs. Output Power Ptot (W) D99AU1087 7 VS= ±17V; Rl= 8Ω; f= 1KHz 6 -14 0.01 0.1 1 10 f(KHz) Figure 9. Distortion vs. Output Power in BTL D99AU1104 THD (%) 5 Bridge VS ± 13V; Rl=8Ω; f=1KHz 2 1 5 0.5 4 0.2 3 0.1 2 0.05 1 0 6/9 0.02 0 2 4 6 8 10 12 14 PO(W) 0.01 0 5 10 15 20 25 PO(W) TDA7490L Figure 10. Distortion vs. Output Power in BTL D99AU1105 THD (%) 5 Bridge VS ± 17V; Rl=16Ω; f=1KHz 2 1 0.5 0.2 0.1 0.05 0.02 0.01 0 5 10 15 20 25 PO(W) 7/9 TDA7490L DIM. A B C D E F (1) G G1 H (2) H1 H2 H3 L (2) L1 L2 (2) L3 L4 L5 M M1 N O R R1 R2 R3 R4 V V1 V2 V3 MIN. 4.45 1.80 0.75 0.37 0.80 23.75 28.90 22.07 18.57 15.50 7.70 3.70 3.60 mm TYP. 4.50 1.90 1.40 0.90 0.39 1.00 24.00 29.23 17.00 12.80 0.80 22.47 18.97 15.70 7.85 5 3.5 4.00 4.00 2.20 2 1.70 0.5 0.3 1.25 0.50 MAX. 4.65 2.00 MIN. 0.175 0.070 1.05 0.42 0.57 1.20 24.25 29.30 0.029 0.014 22.87 19.37 15.90 7.95 0.869 0.731 0.610 0.303 4.30 4.40 0.145 0.142 0.031 0.935 1.138 inch TYP. 0.177 0.074 0.055 0.035 0.015 0.040 0.945 1.150 0.669 0.503 0.031 0.884 0.747 0.618 0.309 0.197 0.138 0.157 0.157 0.086 0.079 0.067 0.02 0.12 0.049 0.019 MAX. 0.183 0.079 OUTLINE AND MECHANICAL DATA 0.041 0.016 0.022 0.047 0.955 1.153 0.904 0.762 0.626 0.313 0.169 0.173 5˚ (Typ.) 3˚ (Typ.) 20˚ (Typ.) 45˚ (Typ.) Flexiwatt25 (1): dam-bar protusion not included (2): molding protusion included H H1 V3 A H2 O H3 R3 L4 R4 V1 R2 L2 N L3 R L L1 V1 V2 R2 D R1 L5 R1 R1 E G G1 F V M B C V FLEX25ME 8/9 M1 TDA7490L 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 © 2001 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 9/9