TDA7391PD 32W BRIDGE CAR RADIO AMPLIFIER PRODUCT PREVIEW HIGH POWER CAPABILITY: 40W/3.2Ω EIAJ 32W/3.2Ω @ VS = 14.4V, f = 1KHz, d = 10% 26W/4Ω @ 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 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. PROTECTIONS: SHORT CIRCUIT (TO GND, TO VS, ACROSS THE LOAD) VERY INDUCTIVE LOADS CHIP OVERTEMPERATURE LOAD DUMP OPEN GND ESD Figure 1: Test And Application Circuit C2 0.22µF IN+ 15 5 16 2 C1 0.22µF IN- 14 TDA7391PD VS SW1 ST-BY 19 4 12 9 C3 33µF +VS C4 1000µF C5 100nF 17 OUT+ OUT- CD Vref R1 4.7KΩ TO µC 8 1,10,11,20 R2 56KΩ GND D98AU871 October 1998 This is preliminary information on a new product now in development. Details are subject to change without notice. 1/8 TDA7391PD Figure 2: Block Diagram VCC1 V CC2 5 16 + SHORT CIRCUIT DUMP & THERMAL PROTECTION REFERENCES STANDBY THRESHOLD IN- 14 19 OUT- POWER AMP COMMON MODE - ICM LTS V=f (Tj) + LTS DISABLE 17 CD VCC/2 IN+ POWER AMP - gm + 15 2 THD DETECT VS PROGRAMMABLE CURRENT CIRCUIT + MUTE THRESHOLD OUT+ 9 8 MUTE SYNC 12 S-GND 4 STANDBY 1,10,11,20 P-GND D98AU872 PIN CONNECTION (Top view) P-GND 1 20 P-GND OUT+ 2 19 OUT- N.C. 3 18 N.C. ST-BY 4 17 CD VCC 5 16 VCC N.C. 6 15 IN+ N.C. 7 14 IN- SYNC 8 13 N.C. MUTE 9 12 S-GND P-GND 10 11 P-GND D98AU873 THERMAL DATA Symbol Rth j-case 2/8 Description Thermal Resistance Junction-case Max Value Unit 2 °C/W TDA7391PD ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit VS DC Supply Voltage 28 V VOP Operating Supply Voltage 18 V Peak Supply Voltage (t = 50ms) 50 V Output Peak Current repetitive (f > 10Hz) Output Peak Current non repetitive 4.5 6 A A 32 W -40 to 150 °C VPEAK IO Ptot Tstg, Tj Power Dissipation (T CASE = 85°C) Storage and Junction-Case Temperature ELECTRICAL CHARACTERISTICS (VS = 14.4V; RL = 4Ω, f = 1KHz, Tamb = 25°C, unless otherwise specified) Symbol Parameter VS Supply Voltage Range Iq Total Quiescent Current Test Condition 60 Output Offset Voltage ISB ST-BY Current VST-BY = 1.5V ISBin ST-BY Input Bias Current VST-BY = 5V ST-BY On Threshold Voltage VSBoff ST-BY Off threshold Voltage ATTST-BY Max. Unit 18 V 150 mA 120 mV 100 µA 10 µA 1.5 V 3.5 ST-BY Attenuation V 90 IM in Mute Input Bias Current AM Mute Attenuation PO RMS Output Power d = 10% d = 1% d = 10%; RL = 3.2Ω EIAJ Output Power VS = 13.7V d Typ. 8 VOS VSBon Min. (VMUTE = 5V) dB 10 20 Distortion PO = 0.1 to 15W dB 26 21 32 W W W 40 W 0.06 0.03 % % GV Voltage Gain fH High Frequency rolloff PO = 1W; -3dB 75 Input Impedance Differential 36 60 KΩ Single Ended 30 55 KΩ 4 mV R IN EIN Input Noise Voltage 29.5 µA 90 R g = 0Ω ; f = 22Hz to 22KHz 30 30.5 dB KHz Input Common Mode Rejection f = 1KHz; VIN = 1Vrms 65 dB SVR Supply Voltage Rejection R g = 0Ω; Vr = 1Vrms 60 dB CDL Clipping Detection Level T sd Absolute Thermal Shutdown Junction Temperature CMRR 5 10 160 15 % °C 3/8 TDA7391PD FUNCTIONAL DESCRIPTION Pin Function Description 14, 15 INPUTS 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. 5,16 +VS Supply Voltage. 17 CD 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 3.2Ω. 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. 2,19 OUTPUTS 1,10, 11,20 P-GND 12 S-GND 4 STAND-BY 8 SYNC 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. 9 MUTE 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. 4/8 Power Ground. 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 µA). When the ST-BY pin is high the IC becomes fully operational. TDA7391PD Figure 2: Quiescent Current vs Supply Voltage Figure 3: EIAJ power vs Supply Voltage RL = 3.2Ω RL = 4Ω Figure 4: Output Power vs Supply Voltage (@ RL = 4Ω) Figure 5: Distortion vs Frequency (@ RL = 4Ω) VS = 14.4V RL = 4Ω PO = 12W R L = 4Ω f = 1KHz f = (Hz) Figure 6: Output Power vs Supply Voltage (@ RL = 3.2Ω) Figure 7: Distortion vs Frequency (RL =4Ω) VS = 14.4V RL = 3.2Ω PO = 15W R L = 3.2Ω f = 1KHz 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 = 4Ω Rg = 0 VS = 14.4V Vcm = 1Vrms RL = 4Ω Rg = 0 f = (Hz) f = (Hz) Figure 10: TotalPower Dissipation & Efficiency vs. Output Power (@ RL = 4Ω) VS = 14.4V R L = 4Ω f = 1KHz PO (W) 6/8 Figure 11: Power Bandwidth VS = 14.4V R L = 4Ω PO = 1W f = (Hz) 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 MIN. mm TYP. 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 1.27 11.43 10.9 inch TYP. 0.050 0.450 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.) 5.8 0 15.5 0.8 OUTLINE AND MECHANICAL DATA MAX. 0.142 0.012 0.130 0.004 0.021 0.013 0.630 0.386 0.570 10 0.437 0.114 0.244 0.004 0.626 0.043 0.043 JEDEC MO-166 0.394 PowerSO20 (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” N R N a2 b A e DETAIL A c a1 DETAIL B E e3 H DETAIL A lead D slug a3 DETAIL B 20 11 0.35 Gage Plane - C- S SEATING PLANE L G E2 E1 BOTTOM VIEW C (COPLANARITY) T E3 1 h x 45 10 PSO20MEC D1 7/8 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. 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