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TDA7482
25W MONO CLASS-D AMPLIFIER
1
FEATURES
25W OUTPUT POWER: RL = 8/4; THD = 10% HIGH EFFICIENCY WIDE SUPPLY VOLTAGE RANGE (UP TO 25V) SPLIT SUPPLY OVERVOLTAGEPROTECTION ST-BY AND MUTE FEATURES SHORT CIRCUIT PROTECTION THERMAL OVERLOAD PROTECTION
Figure 1. Package

Multiwatt15
Table 1. Order Codes
Part Number TDA7482 Package Multiwatt15

2
DESCRIPTION
sembled in Multiwatt15 package specially designed for high efficiency applications mainly for TV and Home Stereo sets.
The TDA7482 is an audio class-D amplifier asFigure 2. Test and Application Circuit.
+5V R1 10K
+VCC
C5 100nF -VCC (Pin 14,15)
R2 10K ST-BY MUTE C1 2.2 F
R3 30K ST-BY/ MUTE IN1 10
N.C. 4
VCC POW 13 11
C6 100nF VCC SIGN
C7 2200F
3 9 + 5
PRE
BOOT C11 100nF OUT C12 560pF R5 150 L1 60H
IN1 C2 0.33F C4 4.7nF C3 1nF
+
PWM
1
FEEDCAP 12 SGN-GND 2 6 FREQ C8 270pF R4 12K (RF) C9 100nF -VCC C10 2200F 8 -VCC SIGN 14,15 -VCC POW VREG
C14 470nF
8
7
C15 100nF BOOTDIODE
D96AU538C
October 2004
Rev. 4 1/7
TDA7482
Table 2. Pin Description
N 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Pin OUT BOOTDIODE BOOT NC FEEDCAP FREQ SGN-GND -VCC SIGN IN ST-BY/MUTE +VCC SIGN VREG +VCC POW -VCC POW -VCC POW PWM OUTPUT BOOTSTRAP DIODE ANODE BOOTSTRAP NOT CONNECTED FEEDBACK INTEGRATING CAPACITOR SETTING FREQUENCY RESISTOR SIGNAL GROUND SIGNAL NEGATIVE SUPPLY INPUT CONTROL STATE PIN POSITIVE SIGNAL SUPPLY INTERNAL VOLTAGE REGULATOR POSITIVE POWER SUPPLY NEGATIVE POWER SUPPLY (to be connected to pin 13 via C5) NEGATIVE POWER SUPPLY (to be connected to pin 13 via C5) Function
Table 3. Absolute Maximum Ratings
Symbol VCC Ptot Tstg, Tj VFREQ Top ESD DC Supply Voltage Power Dissipation Tcase = 70C Storage and Junction Temperature -40 to 150 Maximum Voltage Across RF (pin6) Operating Temperature Range Max ESD on Pins Parameter Value 28 35 C 8 0 to 70 1.2 V C KV Unit V W
Figure 3.
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
D96AU539A
-VCC POW -VCC POW +VCC POW VREG +VCC SIGN ST-BY/MUTE IN -VCC SIGN SGN-GND FREQ FEEDCAP N.C. BOOT BOOTDIODE OUT
TAB CONNECTED TO PIN 8
Table 4. Thermal Data
Symbol Tth j-case Parameter Thermal Resistance Junction-case Value 1.8 to 2.5 Unit C/W
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TDA7482
Table 5. Electrical Characteristcs (Refer to the test circuit, VCC = 21V; RL = 8; RS = 50; RF = 12K; Demod.. filter L = 60H, C = 470nF; f = 1KHz; Tamb = 25`C unless otherwise specified.)
Symbol VS Iq VOS PO PO Parameter Supply Range Total Quiescent Current Output Offset Voltage Output Power Output Power RL = , No LC Filter Play Condition THD = 10% THD = 1% RL = 4 ; VCC = 16V; THD = 10% THD = 1% (*) VCC =21V; RL = 8; PO = 25W THD 10% VCC = 21V; RL = 8; PO = 18W THD 10% VCC = 25V; RL = 8; PO = 43W THD 20% RL = 8; PO = 1W RL = 0 3.5 -70 20 14 Test Condition Min. 10 40 -30 25 18 25 18 3.8 87 Typ. Max. 25 60 10 Unit V mA mV W W W W W %
PD
Maximum Dissipated Power Po Po Efficiency --------------------- ------ () P O + PD PI Top Efficiency maximum Total Harmonic Distortion Overcurrent Protection Threshold Thermal Shut-down Junction Temperature Closed Loop Gain Total Input Noise Maximum Total VCC Protection Input Resistance Supply Voltage Rejection Rising and Falling Time Power Transistor on Resistance Switching Frequency Operative Range Switching Frequency Zero Signal Frequency Constant (***) Frequency Controller Resistor Range (****) Stand-by range Mute Range Play Range (1) Mute Attenuation Quiescent Current @ Stand-by
max THD Imax Tj GV eN VCCTOT MAX Ri SVR Tr, Tf RDSON FSW-OP FSW BF RF
88.5 0.1 5 150 29 30 7 12 50 20 30 60 50 0.4 100 100 120 1.4x10 7 12
9
% % A C 31 dB V V V k dB ns 200 140 KHz KHz Hz 14 K
A Curve f = 20Hz to 22KHz
f = 100Hz; Vr = 0.5
46
MUTE & STAND-BY FUNCTIONS VST-BY VMUTE VPLAY AMUTE IqST-BY
*: **: ***: ****: (1)
0.8 1.8 4 60 80 3 5 2.5
V V V dB mA
The output LC filtermust be changed to: L = 30H; C = 1F PO = measured across the load using the following inductor: COIL 58120 MPPA2 (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 For V10 >5.2V, an input impedance of 10K is to be considered
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TDA7482
Figure 4. Recommended P.C. Board and Component Layout of the Circuit of Figure 2
Note: Capacitor C5 must be as close as possible to device's pins 13 and 14
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TDA7482
Figure 5. Multiwatt15 Mechanical Data & Package Dimensions
DIM. A5 B C D E F G G1 H1 H2 L L1 L2 L3 L4 L7 M M1 S S1 Dia1 21.9 21.7 17.65 17.25 10.3 2.65 4.25 4.73 1.9 1.9 3.65 4.55 5.08 17.5 10.7 22.2 22.1 0.49 0.66 1.02 17.53 19.6 20.2 22.5 22.5 18.1 17.75 10.9 2.9 4.85 5.43 2.6 2.6 3.85 0.862 0.854 0.695 0.679 0.406 0.104 0.167 0.186 0.075 0.075 0.144 0.179 0.200 0.689 0.421 0.874 0.87 1.27 17.78 1 0.55 0.75 1.52 18.03 0.019 0.026 0.040 0.690 0.772 0.795 0.886 0.886 0.713 0.699 0.429 0.114 0.191 0.214 0.102 0.102 0.152 0.050 0.700 2.65 1.6 0.039 0.022 0.030 0.060 0.710 mm MIN. TYP. MAX. MIN. inch TYP. MAX. 0.197 0.104 0.063
OUTLINE AND MECHANICAL DATA
Multiwatt15 (Vertical)
0016036 J
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TDA7482
Table 1. Revision History
Date September 2003 October 2004 Revision 3 4 First Issue in EDOCS Aligned the graphic style to be compliant with the new "Corporate Technical Pubblications Design Guide" Description of Changes
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TDA7482
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 of America www.st.com
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