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TDA7391PD
32W BRIDGE CAR RADIO AMPLIFIER
PRODUCT PREVIEW
HIGH POWER CAPABILITY: 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 ESD
PowerSO20 ORDERING NUMBER: TDA7391PD
DESCRIPTION The TDA7391PD 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.
Figure 1: Test And Application Circuit
+VS C4 1000F
C2 0.22F IN+ C1 0.22F INVS SW1 ST-BY 14 15 5 16
C5 100nF OUT+
2
TDA7391PD
4 12 9 C3 33F
19
OUT-
Vref R1 4.7K TO C
17 8 1,10,11,20 R2 56K GND
CD
D98AU871
October 1998
This is preliminary information on a new product now in development. Details are subject to change without notice.
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TDA7391PD
Figure 2: Block Diagram
VCC1 5
V CC2 16
+ STANDBY THRESHOLD IN14
REFERENCES
SHORT CIRCUIT DUMP & THERMAL PROTECTION
19 POWER AMP COMMON MODE + VCC/2
OUT-
ICM
LTS
V=f (Tj)
LTS DISABLE
17
CD
IN+
15
gm +
-
POWER AMP
2
OUT+
THD DETECT
VS
+ MUTE THRESHOLD 9 MUTE
PROGRAMMABLE CURRENT CIRCUIT 8 SYNC 12 S-GND 4 STANDBY 1,10,11,20 P-GND
D98AU872
PIN CONNECTION (Top view)
P-GND OUT+ N.C. ST-BY VCC N.C. N.C. SYNC MUTE P-GND
1 2 3 4 5 6 7 8 9 10
D98AU873
20 19 18 17 16 15 14 13 12 11
P-GND OUTN.C. CD VCC IN+ INN.C. S-GND P-GND
THERMAL DATA
Symbol Rth j-case 2/8 Description Thermal Resistance Junction-case Max Value 2 Unit C/W
TDA7391PD
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 32 -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 RMS Output Power d = 10% d = 1% d = 10%; RL = 3.2 VS = 13.7V 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 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 % % dB KHz K K mV dB dB % C
EIAJ Output Power d Distortion
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TDA7391PD
FUNCTIONAL DESCRIPTION
Pin 14, 15 5,16 17 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 TDA7391PD 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. Power Ground. P-GND S-GND STAND-BY Signal 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 8and GND in order to program the current that flows in the C 3 capacitor (pin 9). 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.
2,19 1,10, 11,20 12 4
OUTPUTS
8 9
SYNC MUTE
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TDA7391PD
Figure 2: Quiescent Current vs Supply Voltage Figure 3: EIAJ power vs Supply Voltage
RL = 3.2
RL = 4
Figure 4: Output Power vs Supply Voltage (@ RL = 4)
Figure 5: Distortion vs Frequency (@ RL = 4)
R L = 4 f = 1KHz
VS = 14.4V RL = 4 PO = 12W
f = (Hz)
Figure 6: Output Power vs Supply Voltage (@ RL = 3.2)
Figure 7: Distortion vs Frequency (RL =4)
R L = 3.2 f = 1KHz
VS = 14.4V RL = 3.2 PO = 15W
f = (Hz) 5/8
TDA7391PD
Figure 8: Supply Voltage Rejection vs Frequency Figure 9: 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 10: TotalPower Dissipation & Efficiency vs. Output Power (@ RL = 4)
Figure 11: 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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TDA7391PD
DIM. A a1 a2 a3 b c D (1) D1 E e e3 E1 (1) E2 E3 G H h L N S T mm TYP. inch TYP.
MIN. 0.1 0 0.4 0.23 15.8 9.4 13.9
MAX. 3.6 0.3 3.3 0.1 0.53 0.32 16 9.8 14.5
MIN. 0.004 0.000 0.016 0.009 0.622 0.370 0.547
MAX. 0.142 0.012 0.130 0.004 0.021 0.013 0.630 0.386 0.570
OUTLINE AND MECHANICAL DATA
1.27 11.43 10.9 5.8 0 15.5 0.8 11.1 0.429 2.9 6.2 0.228 0.1 0.000 15.9 0.610 1.1 1.1 0.031 10 (max.) 8 (max.) 10
0.050 0.450 0.437 0.114 0.244 0.004 0.626 0.043 0.043
JEDEC MO-166
0.394
(1) "D and F" do not include mold flash or protrusions. - Mold flash or protrusions shall not exceed 0.15 mm (0.006"). - Critical dimensions: "E", "G" and "a3"
PowerSO20
N
N a2 b e A
R
c DETAIL B a1 E DETAIL A
DETAIL A e3 H
lead
D a3 DETAIL B
20 11
Gage Plane 0.35
slug
- C-
S E2 T E1 BOTTOM VIEW
L
SEATING PLANE G C
(COPLANARITY)
E3
1 10
h x 45
PSO20MEC
D1
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TDA7391PD
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibilityfor 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 notauthorizedfor use as critical components in life support devices or systems without express writtenapproval of STMicroelectronics. The ST logois 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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