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TDA7376B
2 x 35W POWER AMPLIFIER FOR CAR RADIO
HIGH OUTPUT POWER CAPABILITY: 2 x 40W max./4 2 x 35W/4 EIAJ 2 x 25W4 @ 14.4V, 1KHz, 10% DIFFERENTIAL INPUTS MINIMUM EXTERNAL COMPONENT COUNT INTERNALLY FIXED GAIN (26dB) MUTE FUNCTION (CMOS COMPATIBLE) AUTOMUTE AT MINIMUM SUPPLY VOLTAGE DETECTION STAND-BY FUNCTION NO AUDIBLE POP DURING MUTE AND STBY OPERATIONS CLIPPING DETECTOR WITH PROGRAMMABLE DISTORTION THRESHOLD PROTECTIONS: SHORT CIRCUIT (OUT TO GROUND, OUT TO SUPPLY VOLTAGE, ACROSS THE LOAD) OVERRATING CHIP TEMPERATURE WITH SOFT THERMAL LIMITER LOAD DUMP VOLTAGE FORTUITOUS OPEN GROUND LOUDSPEAKER DC CURRENT ESD
MULTIWATT15 ORDERING NUMBER: TDA7376B
DESCRIPTION The TDA7376B is a new technology dual bridge Audio Amplifier in Multiwatt 15 package designed for car radio applications. Thanks to the fully complementary PNP/NPN output stage configuration the TDA7376B delivers a rail-to-rail voltage swing with no need of bootstrap capacitors. Differential input pairs, that will accept either single ended or differential input signals, guarantee high noise immunity making the device suitable for both car radio and car boosters applications. The audio mute control, that attenuates the output signal of the audio amplifiers, suppresses pop on - off transients and cuts any noises coming from previous stages. The St-By control, that debiases the amplifiers, reduces the cost of the power switch. The on-board programmable distortion detector allows compression facility whenever the ampifier is overdriven, so limiting the distortion at any levels inside the presettable range.
PIN CONNECTION (Continued)
September 1998
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This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
TDA7376B
BLOCK DIAGRAM
ABSOLUTE MAXIMUM RATINGS
Symbol V OP VS Vpeak IO Ptot Tstg, Tj Operating Supply Voltage DC Supply Voltage Peak Supply Voltage (t = 50ms) Output Peak Current (non rep. t = 100s) Output Peak Current (rep. f > 10Hz) Power Dissipation at Tcase = 85C Storage and Junction Temperature Parameter Value 18 28 50 4.5 3.5 36 -40 to 150 Unit V V V A A W C
THERMAL DATA
Symbol Rth j-case 2/9 Parameter Thermal Resistance Junction-case max. Value 1.8 Unit C/W
TDA7376B
Figure 1: Differential Inputs Test and Application Circuit
1F
Figure 2: Single Ended Inputs Test and Application Circuit
1F
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TDA7376B
Figure 3: Application Board Reference Circuit
1F
Figure 4: P.C. Board and Components Layout of the Circuit of Fig. 3 (1:1 scale)
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TDA7376B
ELECTRICAL CHARACTERISTICS (Refer to the test fig. 1 and 2 circuit, Tamb = 25C; VS = 14.4V; f = 1KHz; RL = 4; unless otherwise specified.)
Symbol VS Id VOS PO PO max PO EIAJ THD CT R IN GV GV EN SVR Parameter Supply Voltage Total Quiescent Drain Current Output Offset Voltage Output Power Max. Output Power (*) EIAJ Output Power (*) Distortion Cross Talk Input Resistance Voltage Gain Channel Gain Balance Input Noise Voltage Supply Voltage Rejection Rg = 600; "A Weighted" Rg = 600; 22Hz to 22KHz f = 100Hz; Vr = 1Vrms; Rg = 0 f = 10KHz; Vr = 1Vrms; Rg = 0 (-3dB) VCM = 1Vrms input referred VSB = 1.5V; POref = 1W 45 55 75 60 80 3.5 100 VM = 1.5V; POref = 1W 3.5 V6 = 0 to VS, ; VS max. = 18V 3.5 Output low, sinked current (Vpin10 = 1.5V) Output high, leakage current (Vpin10 = VS, @ VSmax = 18V)
(*) Saturated square wave output (**) see figure 5 for THD setting.
Test Condition RL = THD = 10% VS = 14.4V VS = 13.7V PO = 0.5 to 10W f = 1KHz; Rg = 0 f = 10KHz; Rg = 0 differential input single ended input differential input single ended input
Min. 8
Typ.
Max. 18 200 120
Unit V mA mV W W W
23 36 32
25 40 35 0.03 80 70 0.3
% dB dB K K
45 40 25 25 26 26 3 4 27 27 1 6
dB dB dB V V dB dB KHz dB
BW CMRR A SB Vsb IN Vsb OUT Isb AM VM IN VM OUT I6 D DL DDOUT
Power Bandwidth Common Mode Rejection Ratio Stand-by Attenuation Stand-by in Threshold Stand-by out Threshold Stand-by Current Consumption Mute Attenuation Mute in Threshold Mute out Threshold Mute pin Current Distortion Detection Level (**) Distortion Detector Output DC Current
90 1.5
dB V V A dB 1.5 100 V V A % mA 10 A
85
1
The TDA7376B is equipped with a programmable clipping distortion detector circuitry that allows to signal out the output stage saturation by providing a current sinking into an open collector output (DDout) when the total harmonic distortion of the output signal reaches the preset level. The desired threshold is fixed through an external divider that produces a proper voltage level across the
THD set pin. Fig. 5 shows the THD detection threshold versus the THD set voltage. Since it is essential that the THD set voltage be proportional to the supply voltage, fig. 5 shows its value as a fraction of VCC. The actual voltage can be computed by multiplying the fraction corresponding to the desired THD threshold by the application's supply voltage.
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TDA7376B
Figure 5: Clip Detector Threshold vs. THD set. Voltage.
V S = 14.4V R L = 4 f = 1KHz
Figure 6: Quiescent Current vs. Supply Voltage
R L = 4
Figure 7: Quiescent Current vs. Temperature
Figure 8: Ouput Power vs. Supply Voltage
f = 1KHz THD = 1% R L = 3.2
RL = 4 Vi = 0
RL = 4
Figure 9: Ouput Power vs. Supply Voltage
Figure 10: EIAJ Power vs. Supply Voltage
f = 1KHz THD = 10% RL = 3.2 RL = 4
f = 1KHz Vi = 2.5Vrms RL = 3.2 RL = 4
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TDA7376B
Figure 11: THD vs. Frequency Figure 12: THD vs. Output Power
VS = 14.4V R L = 4 PO = 12W
VS = 14.4V RL = 4
f (Hz)
Figure 13: Dissipated Power & Efficiency vs. Output Power
VS = 14.4V RL = 4 f = 1KHz
Figure 14: SVR vs. Frequency
Ri = 0 Ri = 600 VS = 14.4V RL = 4 Vr = 1Vrms
f (Hz)
Figure 15: CMRR vs. Frequency
Figure 16: Crosstalk vs. Frequency
V S = 14.4V R L = 4 V i = 1Vrms
VS = 14.4V R L = 4 PO = 1W RL = 0
f (Hz)
f (Hz) 7/9
TDA7376B
DIM. MIN. A B C D E F G G1 H1 H2 L L1 L2 L3 L4 L7 M M1 S S1 Dia1 0.49 0.66 1.02 17.53 19.6 20.2 21.9 21.7 17.65 17.25 10.3 2.65 4.25 4.63 1.9 1.9 3.65 17.5 10.7 4.55 5.08 22.2 22.1 22.5 22.5 18.1 17.75 10.9 2.9 4.85 5.53 2.6 2.6 3.85 0.862 0.854 0.695 0.679 0.406 0.104 0.167 0.182 0.075 0.075 0.144 0.689 0.421 0.179 0.200 0.874 0.870 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 0.218 0.102 0.102 0.152 0.050 0.700 mm TYP. MAX. 5 2.65 1.6 0.039 0.022 0.030 0.060 0.710 MIN. inch TYP. MAX. 0.197 0.104 0.063
OUTLINE AND MECHANICAL DATA
Multiwatt15 V
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TDA7376B
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 (c) 1998 STMicroelectronics - Printed in Italy - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - France - Germany - Italy - Japan - Korea - Malaysia - Malta - Mexico - Morocco - The Netherlands Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A. http://www.st.com
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