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(R)
TDA7391
35W BRIDGE CAR RADIO AMPLIFIER
HIGH POWER CAPABILITY: 40W/4 MAX 35W/4 EIAJ 45W/3.2 MAX 40W/3.2 EIAJ 32W/3.2 @ VS = 14.4V, f = 1KHz, d = 10% 26W/4 @ VS = 14.4V, f = 1KHz, d = 10% DIFFERENTIAL INPUTS (EITHER SINGLE ENDED OR DIFFERENTIAL INPUT SIGNAL ARE ACCEPTED) MINIMUM EXTERNAL COMPONENT COUNT: - NO BOOTSTRAP CAPACITORS - NO BOUCHEROT CELLS - INTERNALLY FIXED GAIN (30dB) - NO SVR CAPACITOR ST.-BY FUNCTION (CMOS COMPATIBLE) PROGRAMMABLE TURN-ON/OFF DELAY NO AUDIBLE POP DURING MUTE AND STBY OPERATIONS PROTECTIONS: SHORT CIRCUIT (TO GND, TO VS, ACROSS THE LOAD) VERY INDUCTIVE LOADS CHIP OVERTEMPERATURE LOAD DUMP OPEN GND Figure 1: Test And Application Circuit
Multiwatt11 ORDERING NUMBER: TDA7391
ESD DESCRIPTION The TDA7391 is a BRIDGE class AB audio power amplifier specially intended for car radio High Power applications. The high power capability together with the possibility to operate either in DIFFERENTIAL INPUT MODE or SINGLE ENDED INPUT MODE makes it suitable for boosters and high end car radio equipments. The exclusive fully complementary output stage and the internal fixed gain configuration drop the external component count. The on board clipping detector allows easy implementation of gain compression systems.
+VS C2 0.22F IN+ C1 0.22F IN1 2 3 9 7 C5 100nF OUT+ C4 1000F
TDA7391
5
OUT-
Vref R1 4.7K TO C
VS SW1 ST-BY
8 11 10 R2 56K 6
4 GND
CD
C3 33F
D94AU133
October 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.
TDA7391
Figure 2: Block Diagram
V CC1 3
VCC2 9
+ STANDBY THRESHOLD IN1
REFERENCES
SHORT CIRCUIT DUMP & THERMAL PROTECTION
5 POWER AMP COMMON MODE + V CC/2
OUT-
ICM
LTS
V=f (Tj)
LTS DISABLE
4
CD
IN+
2
gm +
-
POWER AMP
7
OUT+
THD DETECT
VS
+ MUTE THRESHOLD 11 MUTE
PROGRAMMABLE CURRENT CIRCUIT 10 SYNC 6 GND 8 STANDBY
D94AU134
PIN CONNECTION (Top view)
11 10 9 8 7 6 5 4 3 2 1 MUTE SYNC +VS STAND-BY OUT+ GND OUTCD +VS IN+ IN-
TAB CONNECTED TO PIN 6
D94AU135
THERMAL DATA
Symbol Rth j-case Description Thermal Resistance Junction-case Max Value 1.8 Unit C/W
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TDA7391
ABSOLUTE MAXIMUM RATINGS
Symbol VS VOP VPEAK IO Ptot Tstg, Tj DC Supply Voltage Operating Supply Voltage Peak Supply Voltage (t = 50ms) Output Peak Current repetitive (f > 10Hz) Output Peak Current non repetitive Power Dissipation (T CASE = 85C) Storage and Junction-Case Temperature Parameter Value 28 18 50 4.5 6 43 -40 to 150 Unit V V V A A W C
ELECTRICAL CHARACTERISTICS (VS = 14.4V; RL = 4, f = 1KHz, Tamb = 25C, unless otherwise specified)
Symbol VS Iq VOS ISB ISBin VSBon VSBoff ATTST-BY IM in AM PO Parameter Supply Voltage Range Total Quiescent Current Output Offset Voltage ST-BY Current ST-BY Input Bias Current ST-BY On Threshold Voltage ST-BY Off threshold Voltage ST-BY Attenuation Mute Input Bias Current Mute Attenuation Output Power d = 10% d = 1% d = 10%; RL = 3.2 VS = 13.7V; RL = 3.2 VS = 14.4V; RL = 3.2 PO = 0.1 to 15W GV fH R IN EIN CMRR SVR CDL T sd Voltage Gain High Frequency rolloff Input Impedance Input Noise Voltage Input Common Mode Rejection Supply Voltage Rejection Clipping Detection Level Absolute Thermal Shutdown Junction Temperature PO = 1W; -3dB Differential Single Ended R g = 0 ; f = 22Hz to 22KHz f = 1KHz; VIN = 1Vrms R g = 0; Vr = 1Vrms 5 29.5 75 36 30 60 55 4 65 60 10 160 15 20 (VMUTE = 5V) 90 26 21 32 40 45 0.06 0.03 30 30.5 3.5 90 10 VST-BY = 1.5V VST-BY = 5V Test Condition Min. 8 60 Typ. Max. 18 150 120 100 10 1.5 Unit V mA mV A A V V dB A dB W W W W W % % dB KHz K K mV dB dB % C
PO EIAJ PO MAX d
EIAJ Output Power (*) MAX Output Power (*) Distortion
(*) Saturated sqare wave output.
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TDA7391
FUNCTIONAL DESCRIPTION
Pin 1, 2 3,9 4 Function INPUTS +VS CD Description The input stage is a high impedance type also capable of operation in single ended mode with one input capacitively coupled to the signal GND. The impedance seen by the inverting and non inverting input pins must be matched. Supply Voltage. The TDA7391 is equipped with a diagnostic circuitry able to detect the clipping in the Output Signal (distortion = 10%). The CD pin (open collector) gives out low level signal during clipping. The output stage is a bridge type able to drive loads as low as 3.2. It consists of two class AB fully complementary PNP/NPN stages fully protected. A rail to rail output voltage swing is achieved without need of bootstrap capacitors. No external compensation is necessary. Ground. The device features a ST-BY function which shuts down all the internal bias supplies when the ST-BY pin is low. In ST-BY mode the amplifier sinks a small current (in the range of few A). When the ST-BY pin is high the IC becomes fully operational. A resistor (R2) has to be connect between pin 10 and GND in order to program the current that flows in the C 3 capacitor (pin 11). The values of C3 and R2 determine the time required to bias the amplifier. The pin will have a capacitor (C3) tied to GND to set the MUTE/STAND-BY time. An automatic Mute during turn on/off is provided to prevent noisy transients.
5, 7 6 8
OUTPUTS GND STAND-BY
10 11
SYNC MUTE
Figure 3: P.C. Board and Component Layout of the Fig. 1 (1:1 scale).
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TDA7391
Figure 4: Quiescent Current vs Supply Voltage Figure 5: EIAJ power vs Supply Voltage
RL = 3.2
RL = 4
Figure 6: Output Power vs Supply Voltage (@ RL = 4)
Figure 7: Distortion vs Frequency (@ RL = 4)
R L = 4 f = 1KHz
VS = 14.4V RL = 4 PO = 12W
f = (Hz)
Figure 8: Output Power vs Supply Voltage (@ RL = 3.2)
Figure 9: Distortion vs Frequency (RL =4)
R L = 3.2 f = 1KHz
VS = 14.4V RL = 3.2 PO = 15W
f = (Hz) 5/8
TDA7391
Figure 10: Supply Voltage Rejection vs Frequency Figure 11: Common Mode Rejection vs. Frequency
VS = 14.4V Vr = 1Vrms RL = 4 Rg = 0
VS = 14.4V Vcm = 1Vrms RL = 4 Rg = 0
f = (Hz)
f = (Hz)
Figure 12: TotalPower Dissipation & Efficiency vs. Output Power (@ RL = 4)
Figure 13: Power Bandwidth
VS = 14.4V R L = 4 f = 1KHz
VS = 14.4V R L = 4 PO = 1W
PO (W)
f = (Hz)
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TDA7391
mm MIN. TYP. MAX. 5 2.65 1.6 1 0.49 0.88 1.45 16.75 19.6 21.9 21.7 17.4 17.25 10.3 2.65 4.25 4.73 1.9 1.9 3.65 17.5 10.7 4.55 5.08 22.2 22.1 20.2 22.5 22.5 18.1 17.75 10.9 2.9 4.85 5.43 2.6 2.6 3.85 1.7 17 0.55 0.95 1.95 17.25 0.019 0.035 0.057 0.659 0.772 0.862 0.854 0.685 0.679 0.406 0.104 0.167 0.186 0.075 0.075 0.144 0.689 0.421 0.179 0.200 0.874 0.87 0.795 0.886 0.886 0.713 0.699 0.429 0.114 0.191 0.214 0.102 0.102 0.152 0.067 0.669 0.039 0.022 0.037 0.077 0.679 MIN. inch TYP. MAX. 0.197 0.104 0.063
DIM. A B C D E F G G1 H1 H2 L L1 L2 L3 L4 L7 M M1 S S1 Dia1
OUTLINE AND MECHANICAL DATA
Multiwatt11 V
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TDA7391
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 MULTIWATT (R) is a Registered Trademark of SGS-THOMSON Microelectronics 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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