TDA7490

TDA7490 25W + 25W STEREO CLASS-D AMPLIFIER 50W MONO IN BTL 1 FEATURES Figure 1. Package ■ 25W + 25W 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 ) s ( t c u d o ) r s ( P t c e 2 DESCRIPTION t u e d l o o r s P b e O t e l ) o s ( s t b c u O d o ) r s P ( t c e t u e l d o o r s P b O e t e l o s b O ■ ■ ■ ■ ■ ■ ■ ■ Flexiwatt 25 Table 1. Order Codes Part Number Package TDA7490 Flexiwatt 25 The TDA7490 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 2. 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 December 2005 Rev. 6 1/10 TDA7490 Figure 3. Test and Application Circuit. (Bridge Configuration) 470pF C40 R4 68K C41 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 L9 30µ Int. PWM-stage 3 + PRE C23 235nF C26 470nF dumping (common mode) R27 10 ) s ( t c u d o ) r s ( P t c e t u e d l o o r s P b e O t e l ) o s ( s t b c u O d o ) r s P ( t c e t u e l d o o r s P b O e t e l o s b O R63 4.7K C24 235nF 18 PRE + Int. PWM-stage 23 - 19 R25 Rload R28 10 C29 470nF L10 30µ 17 470pF 470pF C60 R61 68K C59 R62 52.3K D99AU1081 Table 2. Absolute Maximum Ratings Symbol Parameter Value Unit VCC DC Supply Voltage (no signal) ±30 V Ptot Power Dissipation Tcase = 70°C 35 W –40 to 150 °C 0 to 70 °C ±5 V Value Unit 1 °C/W Tstg, Tj Top V6,8,10,18 Storage and Junction Temperature Operating Temperature Range Maximum Voltage on pins # 6,8,10,18 referred to GND Table 3. Thermal Data Symbol Rth j-case 2/10 Parameter Thermal Resistance Junction-case Typ. TDA7490 Figure 4. Pin Connection 1 25 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 OUT1 -VCC ) s ( t c u d o ) r s ( P t c e t u e d l o o r s P b e O t e l ) o s ( s t b c u O d o ) r s P ( t c e t u e l d o o r s P b O e t e l o s b O D97AU816B Table 4. Pin Description Pin N° Name 1 -VCC sign/sub 2 -VCCpow1 3 out 1 4 +VCCpow1 Function Negative signal/substrate supply Negative power supply CH1 PWM output of CH1 Positive power supply CH1 5 BOOT1 6 STBY-MUTE Bootstrap CH1 7 FEED1 8 OSC 9 FEED2 10 IN1 Input CH1 11 T1 Triangular waveform CH1 Control State Pin Feedback pin 1 CH1 Master Oscillator Setting Freequency Pin (or external sync.) Feedback pin2 CH1 12 +5V +5V regulator (only for internal purposes) 13 GND Signal ground 14 CURREF 15 T2 Setting current resistor Triangular waveform CH2 16 -5V 17 FEED3 18 IN2 19 FEED4 20 NC Not connected 21 BOOT2 Bootstrap CH2 22 +VCCpow2 23 OUT2 24 -VCCpow2 25 Vreg -5V regulator (only for internal purposes) Feedback pin1 CH2 Input CH2 Feedback pin2 CH2 Positive power supply CH2 PWM output of CH2 Negative power supply CH2 10V regulator 3/10 TDA7490 Table 5. Electrical Characteristics (Refer to the test circuit, VCC = ±21V; RL = 8Ω; Demod. filter L = 30µH, C = 220nF; f = 1KHz; fsw = 200kHz; Tamb = 25°C unless otherwise specified.) Symbol Parameter Test Condition VS Supply Range Iq Total Quiescent Current VOS Po Po(BTL) Min. Typ. ±10 RL = ∞ no LC filter Output Offset Voltage 70 -150 Output Power THD = 10% THD= 1% Output Power in Bridge Configuration 20 15 Max. Unit ±25 V 120 mA +150 mV 25 18 W W VS = ±22V; RL = 16Ω THD = 10% THD=1% 50 40 W W VS =±17V; RL = 8Ω THD = 10% THD=1% 50 40 W W RL = 4Ω Vcc=±16V THD = 10% THD=1% 25 18 W W 6 W 89 % 0.1 % 5 A 150 °C ) s ( t c u d o ) r s ( P t c e t u e d l o o r s P b e O t e l ) o s ( s t b c u O d o ) r s P ( t c e t u e l d o o r s P b O e t e l o s b O Po(1) Output Power PD Maximum Dissipated Power VCC = ±21V; RL = 8Ω Pο = 25W + 25W; THD = 10% η(2) Efficiency (*) Po = 20W + 20W THD Total Harmonic Distortion RL = 8Ω; Po = 1 W Imax Overcurrent Protection Threshold RL = 0 80 3.5 Thermal Shut-down Junction Temperature Tj Gv ∆Gv (3) Closed Loop Gain 29 Gain Matching -1 30 31 dB +1 dB eN Total Input Noise RG = 50Ω A Curve f = 20Hz to 22KHz 7 12 µV µV CT Cross talk f = 1 KHz, Po = 1W 55 dB Ri Input Resistance 30 kΩ 20 SVR Supply Voltage Rejection Vrmax Overvoltage Threshold (5) Tr, Tt Rising and Falling Time RDSON Fsw (4) f = 100Hz; Vr = 0.5 60 60 V 50 70 ns 0.4 0.8 Ω 200 230 KHz 0 07 V 1.7 2.5 V Power Transistor on Resistance Switching Frequency Range dB 55 100 MUTE & STAND-BY FUNCTIONS VST-BY Stand-by range VMUTE Mute Range VPLAY Play Range 4 AMUTE Mute Attenuation 55 IqST-BY Quiescent Current @ Stand-by 5 60 3 *: Po = measured across the load using the following inductor: COIL58120 MPPA 2 (magnectics) TURNS= 20∅ 1 mm (1) L = 15µH, C = 470nF (2) ηTop = 90% where Vcc = ±25V; RL = 8Ω; Po = 43W + 43W; THD = 20% (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 4/10 V dB 5 mA TDA7490 Figure 5. P.C. Board and Component Layout of the Figs. 2, 3 (for Stereo and Bridge Compatible Configuration) Component Side ) s ( t c u d o ) r s ( P t c e t u e d l o o r s P b e O t e l ) o s ( s t b c u O d o ) r s P ( t c e t u e l d o o r s P b O e t e l o s b O Solder Side 5/10 TDA7490 Figure 9. Frequency Response Figure 6. Distortion vs. Output Power D99AU1088 THD (%) 5 Stereo VS ± 21V; Rl=8Ω; f=1KHz 2 AMP (dB) D99AU1091 2 0 1 -2 0.5 -4 0.2 -6 0.1 -8 VS ± 21V; Rl=8Ω; 0dB=1W ) s ( t c u d o ) r s ( P t c e t u e d l o o r s P b e O t e l ) o s ( s t b c u O d o ) r s P ( t c e t u e l d o o r s P b O e t e l o s b O 0.05 -10 0.02 -12 0.01 0 2 4 6 8 10 12 14 16 18 20 22 24 PO(W) 8 7.5 7 6.5 6 5.5 5 4.5 4 3.5 3 2.5 2 1.5 1 0.5 0 Stereo VS ± 16V; Rl=4Ω; f=1KHz 2 1 0.5 0.2 0.1 0.05 0.02 0 2 4 6 8 10 12 14 16 18 20 22 -20 10 f(KHz) Vs= +/- 21 V; Rl = 8 Ohm; f= 1 KHz 0 2 4 6 8 10 12 14 16 18 20 22 24 26 Output Power (W) 24 PO(W) Figure 8. Crosstalk vs. Frequency Figure 11. Distortion vs. Output Power in BTL D99AU1102 CT (dB) 1 Power Dissipation (W) D99AU1089 THD (%) 5 0.1 Figure 10. Power Dissipation vs. Output Power Figure 7. Distortion vs. Output Power 0.01 -14 0.01 VS ± 17V; Rl=8Ω; 0dB=1W D99AU1082 THD (%) 5 Bridge VS ± 17V; Rl=8Ω; f=1KHz 2 -30 1 -40 0.5 -50 -60 0.2 -70 0.1 -80 0.05 -90 0.02 -100 0.001 6/10 0.01 0.1 1 f(KHz) 0.01 0 5 10 15 20 25 30 35 40 45 50 PO(W) TDA7490 Figure 12. Distortion vs. Output Power in BTL D99AU1083 THD (%) 5 Bridge VS ± 22V; Rl=16Ω; f=1KHz 2 1 0.5 0.2 0.1 ) s ( t c u d o ) r s ( P t c e t u e d l o o r s P b e O t e l ) o s ( s t b c u O d o ) r s P ( t c e t u e l d o o r s P b O e t e l o s b O 0.05 0.02 0.01 0 5 10 15 20 25 30 35 40 45 50 PO(W) 7/10 TDA7490 Figure 13. Package Dimensions 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 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 0.031 0.935 1.139 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 ) s ( t c u d o ) r s ( P t c e t u e d l o o r s P b Flexiwatt25 (vertical) e O t e l ) o s ( s t b c u O d o ) r s P ( t c e t u e l d o o r s P b O e t e l o s b O 22.07 18.57 15.50 7.70 3.70 3.60 22.87 19.37 15.90 7.95 0.869 0.731 0.610 0.303 4.30 4.40 0.145 0.142 0.904 0.762 0.626 0.313 0.169 0.173 5˚ (T p.) 3˚ (Typ.) 20˚ (Typ.) 45˚ (Typ.) (1): dam-bar protusion not included (2): molding protusion included V C B V H H1 V3 A H2 O H3 R3 L4 R4 V1 R2 L2 N L3 R L L1 V1 V2 R2 D R1 L5 Pin 1 R1 R1 E G G1 F FLEX25ME M M1 7034862 8/10 TDA7490 Table 6. Revision History Date Revision Description of Changes March 2001 5 First Issue December 2005 6 Corrected the value of the inductance in the caption of the Table 5 “Electrical Characteristics”. ) s ( t c u d o ) r s ( P t c e t u e d l o o r s P b e O t e l ) o s ( s t b c u O d o ) r s P ( t c e t u e l d o o r s P b O e t e l o s b O 9/10 TDA7490 ) s ( t c u d o ) r s ( P t c e t u e d l o o r s P b e O t e l ) o s ( s t b c u O d o ) r s P ( t c e t u e l d o o r s P b O e t e l o s b O 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