TDA7480

TDA7480 ® 10W MONO CLASS-D AMPLIFIER 10W OUTPUT POWER: RL = 8Ω/4Ω; THD = 10% HIGH EFFICIENCY NO HEATSINK SPLIT SUPPLY OVERVOLTAGE PROTECTION ST-BY AND MUTE FEATURES SHORT CIRCUIT PROTECTION THERMAL OVERLOAD PROTECTION PDIP20 (14+3+3) DESCRIPTION The TDA7480 is an audio class-D amplifier assembled in Power DIP package specially designed for high efficiency applications mainly for TV and Home Stereo sets. +VCC ) s ( ct R1 10K MUTE IN1 t e l o C2 0.33µF C4 4.7nF s b O C5 100nF -VCC (Pin 17) u d o R3 30K r P e C1 2.2 µF o r P o s b O - +5V ST-BY ORDERING NUMBER: TDA7480 e t le Figure 1: Test and Application Circuit. R2 7K c u d ) s t( ST-BY/ MUTE IN1 12 N.C. C6 100nF VCC SIGN VCC POW 7,13 16 C7 2200µF 14 6 11 + C3 1nF C11 100nF 4 - PRE BOOT PWM + OUT 8 FEEDCAP C12 560pF R5 150Ω L1 60µH C14 470nF 8Ω BOOTDIODE SGN-GND 5 10 9 1,2,3,18,19,20 FREQ C8 270pF D96AU536E September 1998 15 17 VREG -VCC -VCC C15 100nF R4 12KΩ RF -VCC -VCC C9 100nF C10 2200µF 1/10 TDA7480 ABSOLUTE MAXIMUM RATINGS Symbol Parameter VCC Tstg, Tj DC Supply Voltage VFREQ Maximum Voltage Across VFREQ (Pin 9) Top ESD Operating Temperature Range Storage and Junction Temperature °C 8 V -20 to 70 °C ±1.8 kV Rthj-a (˚C/W) 1 20 -VCC -VCC 2 19 -VCC -VCC 3 18 -VCC OUT 4 17 -VCC BOOTDIODE 5 16 +VCC POW D97AU675 COPPER AREA 35µ THICKNESS 60 PC BOARD c u d 50 BOOT 6 15 VREG N.C. 7 14 +VCC SIGN FEEDCAP 8 13 N.C. FREQ 9 12 STBY/MUTE 10 11 IN SGN-GND 40 D96AU537B e t le 30 0 THERMAL DATA Symbol o s b O - Thermal Resistance Junction to ambient Rth j-pin Thermal Resistance Junction to Pin o r P e N. Name 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 -VCC -VCC -VCC OUT BOOTDIODE BOOT NC FEEDCAP FREQUENCY SGN-GND IN ST-BY-MUTE NC +VCC SIGN VREG +VCC POW -VCC -VCC -VCC -VCC t e l o c u d (t s) ) s t( o r P 4 8 Parameter Rth j-amb PIN FUNCTIONS V Rth with "on board" Square Heatsink vs. copper area. -VCC 2/10 Unit ±20 –40 to 150 Maximum ESD on Pins PIN CONNECTION (Top view) s b O Value Max. Function NEGATIVE SUPPLY. NEGATIVE SUPPLY. NEGATIVE SUPPLY. PWM OUTPUT BOOTSTRAP DIODE ANODE BOOTSTRAP CAPACITOR NOT CONNECTED FEEDBACK INTEGRATING CAPACITANCE SETTING FREQUENCY RESISTOR SIGNAL GROUND INPUT ST-BY/ MUTE CONTROL PIN NOT CONNECTED POSITIVE SIGNAL SUPPLY 10V INTERNAL REGULATOR POSITIVE POWER SUPPLY NEGATIVE SUPPLY (TO BE CONNECTED TO PIN 16 VIA C5) NEGATIVE SUPPLY NEGATIVE SUPPLY NEGATIVE SUPPLY 12 Area(cm2) Value Unit 80 °C/W 12 °C/W TDA7480 ELECTRICAL CHARACTERISTICS (Refer to the test circuit, VCC = ±14V; RL = 8Ω; RS = 50Ω; Rf = 12KΩ; Demod.. filter L = 60µH, C = 470nF; f = 1KHz; Tamb = 25°C unless otherwise specified.) Symbol Parameter Test Condition Min. Supply Range VOS Output Offset Voltage Play Condition –50 PO Output Power THD = 10% THD = 1% 8.5 6 RL = ∞; NO LC Filter Total Quiescent Current mA +50 mV W W 1 W 1.8 W 85 % 0.1 ) s t( PDMAX Maximum Dissipated Power PΟ = 10W THD 10% Rth-j-amb = 38°C/W (Area 12cm2) THD 10% Rth-j-amb = 38°C/W (Area 12cm2) PO PO (**) ≡ PO + PD PI THD Total Harmonic Distortion RL = 8Ω; PO = 0.5W Imax Overcurrent Protection Threshold RL = 0 Tj Thermal Shut-down Junction Temperature GV eN Closed Loop Gain Total Input Noise 3.5 Tr, Tf Rising and Falling Time RDSON FSW Power Transistor on Resistance FSW_OP Switching Frequency Operative Range so f = 100Hz; Vr = 0.5 Switching Frequency (s) b O - ct BF Zero Signal Frequency Constant (***) RF Frequency Controller Resistor Range (****) u d o % uc 5 r P e t le 29 A Curve f = 20Hz to 22KHz Input Resistance Supply Voltage Rejection r P e 80 od 150 Ri SVR V 10 7 30 7 12 31 A °C dB µV µV 20 30 KΩ 46 60 dB 50 ns 140 Ω KHz 200 KHz 0.4 100 120 100 1.4x109 7 12 HzΩ 14 KΩ 0.8 V 2.5 V V MUTE & STAND-BY FUNCTIONS VST-BY Stand-by range VMUTE VPLAY Mute Range Play Range (1) 1.8 4 AMUTE Mute Attenuation 60 IqST-BY Quiescent Current @ Stand-by t e l o O 25 RL = 4Ω VCC = ±10.5V THD = 10% THD = 1% Rf = 12KΩ PΟ = 1W bs Unit ±16 40 W W Dissipated Power at 1W Output Power Efficiency ≡ Max. 10 7 Pd (*) η Typ. ±10 VS Iq 80 3 dB 5 mA *: The output average power when the amplifier is playing music can be considered roughly 1/10 of the maximum output power. So it is useful to consider the dissipated power in this condition for thermal dimensioning. **: PO = measured across the load using the following inductor: COIL 58120 MPPA2 (magnetics) TURNS: 28 ∅ 1mm COIL77120 KOOL Mµ (magnetics) TURNS: 28 ∅ 1mm ***: The zero-signal switching frequency can be obtained using the following expression: FSW = BF/RF ****: The maximum value of RF is related to the maximum possible value for the voltage drop on RF itself. (1): For V12 >5.2V, an input impedance of 10KΩ is to be considered. 3/10 TDA7480 Figure 2: Recomended P.C. Board and Component Layout of the Circuit of Figure1 (1.25:1 scale). c u d o s b O - Note: Capacitor C5 must be as close as possible to device’s pins 16 and 17 ) s ( ct u d o r P e t e l o s b O 4/10 e t le o r P ) s t( TDA7480 Figure 3: Stereo Application in Single Supply. R1 10K -VCC (Pin 17) (*) +5V R3 30K C1 2.2µF R2 10K MUTE +VS C5 100nF L2 1µH ST-BY C6 100nF VCC N.C. SGN-GND ST-BY/MUTE MUTE/ ST-BY C2 0.33µF IN IN LEFT C4 4.7nF 7,13 14,16 6 10 4 12 TDA7480 11 C10 47µF/50VI BOOT C11 100nF OUT R5 150Ω 5 8 1,2,3,17, 18,19,20 9 FREQ 15 ST-BY/MUTE MUTE/ ST-BY C16 0.33µF IN IN RIGHT L3 1µH PGND C15 100nF L6 1µH 14,16 10 TDA7480 o r P e C25 100nF 9 c u d R8 12KΩ C26 560pF R9 150Ω (t s) 1,2,3,17, 18,19,20 -VCC SIGN C22 100nF e t le L5 60µH o s b O 5 8 C23 47µF/50VI BOOT OUT 12 FREQ (*) +5V Referred to VCC/2 6 4 C24 270pF C21 47µF/50VI VCC C17 1nF FEEDCAP c u d C9 100nF RIGHT C18 4.7nF C30 2200µF/ 50VI L4 1µH 7,13 11 R7 1K/2W OUT LEFT C14 470nF C20 100nF SGN-GND C29 2200µF/ 50VI VREG -VCC SIGN C19 100nF N.C. R6 1K/2W OUT R BOOTDIODE R4 12KΩ C8 270pF L1 60µH C12 560pF LEFT C3 1nF FEEDCAP C7 47µF/50VI 15 BOOTDIODE ) s t( o r P OUT R OUT RIGHT C28 470nF L7 1µH PGND VREG C27 100nF L8 1µH D97AU815C t e l o s b O 5/10 TDA7480 Figure 4: PC Board and component Layout of the Circuit of Figure 3. c u d e t le ) s ( ct u d o r P e t e l o s b O 6/10 o s b O - o r P ) s t( TDA7480 TYPICAL CHARACTERISTICS (Application Circuit of fig 1 unless otherwise specified) Figure 5. Output Power vs. Supply Voltage Figure 6. Distortion vs. Output Power Output Power (W) 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 10 THD (%) 10 Rl= 8 Ohm F= 1 KHz Thd=10% 1 Vs= +/- 14V Rl= 8 Ohm 0.1 Thd=1% F= 1 KHz 10.5 11 11.5 12 12.5 13 13.5 14 14.5 15 15.5 16 0.01 0 1 2 3 4 Supply Voltage (+/- V) THD (%) 2 e t le 1.4 1 so 1.2 0.8 Vs= +/- 10.5V Rl= 4 Ohm 3 4 5 6 7 ) s ( ct 8 u d o Output Power (W) r P e t e l o Power Dissipation (W) bs 2 9 0 10 100 70 60 50 40 Vs= +/- 10.5V Rl= 4 Ohm F= 1 KHz 0.5 30 20 10 0 0 1 2 3 4 5 6 Output Power (W) 7 8 9 Pdiss 40 Vs= +/- 14V Rl= 8 Ohm F= 1 KHz 20 0 1 2 3 4 5 6 7 8 0 10 9 Output Power (W) 80 1 100 0.2 90 Efficiency Pdiss ) s t( Figure 10. Mute Attenuation vs. Vpin 12 Efficiency (%) O 1.5 10 80 0.4 Figure 9. Power Dissipation and Efficiency vs. Output Power 2.5 9 Efficiency (%) 0.6 F= 1 KHz 2 8 60 b O 1 0.1 o r P Efficiency 1.6 1 7 c u d Power Dissipation (W) 1.8 0 6 Figure 8. Power Dissipation and Efficiency vs. Output Power Figure 7. Distortion vs. Output Power 10 5 Output Power (W) 0 10 20 10 Attenuation (dB) 0 Vs= +/- 14V Rl= 8 Ohm 0 dB =1 W @ F= 1 KHz -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 -110 -120 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 Vpin #12 (V) 7/10 TDA7480 Figure 11. Supply Voltage Rejection vs. Frequency 0 S.V.R. (dB) -10 Vs= +/- 14V Rl= 8 Ohm Rs= 50 Ohm Vr=0.5Vrms -20 -30 -40 -50 -60 -70 -80 -90 -100 -110 -120 0.01 0.1 1 10 Frequency (KHz) c u d e t le ) s ( ct u d o r P e t e l o s b O 8/10 o s b O - o r P ) s t( TDA7480 POWERDIP20 PACKAGE MECHANICAL DATA mm DIM. MIN. a1 0.51 B 0.85 TYP. inch MAX. MIN. TYP. 0.020 1.40 b 0.033 0.055 0.50 b1 MAX. 0.38 0.020 0.50 D 0.015 0.020 24.80 0.976 E 8.80 0.346 e 2.54 0.100 e3 22.86 0.900 F 7.10 I 5.10 L uc 3.30 P e let Z 1.27 ) s ( ct d o r ) s t( 0.280 0.201 0.130 0.050 o s b O - u d o r P e t e l o s b O 9/10 TDA7480 c u d e t le ) s ( ct ) s t( o r P o s b O - u d o r P 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. 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. 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