TDA7391PD 32 W bridge car radio amplifier Features ■ High power capability: – 40 W/3.2 Ω EIAJ – 32 W/3.2 Ω @ VS = 14.4 V, f = 1 kHz, d = 10 % – 26 W/4 Ω @ VS = 14.4 V, f = 1 kHz, 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 (30 dB) – No SVR capacitor ■ Stand-by function (CMOS compatible) ■ Programmable turn-on/off delay ■ No audible pop during mute and stand-by operations PowerSO-20 Description The TDA7391PD is a bridge class AB audio power amplifier specially intended for car radio high power applications. Protections ■ Short circuit (to GND, to VS, across the load) ■ Very inductive loads ■ Chip over temperature ■ Load dump ■ Open GND ■ ESD Table 1. July 2008 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 equipment. 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. Device summary Order code Package Packing TDA7391PD PowerSO-20 Tube TDA7391PD13TR PowerSO-20 Tape and reel Rev 2 1/11 www.st.com 11 Contents TDA7391PD Contents 1 Test and application circuit, block diagram . . . . . . . . . . . . . . . . . . . . . . 3 2 Pins description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3.3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3.4 Electrical characteristics curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 4 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 5 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2/11 TDA7391PD 1 Test and application circuit, block diagram Test and application circuit, block diagram Figure 1. Test and application circuit +VS C2 0.22μF 15 IN+ 5 16 2 C1 0.22μF 14 IN- TDA7391PD VS SW1 C4 1000μF C5 100nF 19 4 ST-BY 17 12 9 OUT+ OUT- Vref R1 4.7KΩ CD TO μC 8 1,10,11,20 R2 56KΩ C3 33μF GND D98AU871 Figure 2. Block diagram VCC1 VCC2 5 16 + SHORT CIRCUIT DUMP & THERMAL PROTECTION REFERENCES STANDBY THRESHOLD IN- 14 19 POWER AMP COMMON MODE - ICM V=f (Tj) LTS + LTS DISABLE 17 OUT- CD VCC/2 IN+ - 15 2 POWER AMP gm + 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 3/11 Pins description 2 TDA7391PD Pins description Figure 3. Pins 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 Table 2. Pin Function 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. 14, 15 INPUTS 5, 16 +V S 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. 2, 19 4/11 Pins function 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. OUTPUTS A rail to rail output voltage swing is achieved without need of bootstrap capacitors. No external compensation is necessary. 1, 10, 11, 20 GND Power Ground. 12 S-GND Signal ground. 4 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 STAND-BY current (in the range of few μA). When the ST-BY pin is high the IC becomes fully operational. 8 SYNC A resistor (R2) has to be connect between pin 8 and GND in order to program the current that flows in the C3 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. TDA7391PD Electrical specifications 3 Electrical specifications 3.1 Absolute maximum ratings Table 3. Absolute maximum ratings Symbol Value Unit VS DC supply voltage 28 V VOP Operating supply voltage 18 V Peak supply voltage (t = 50 ms) 50 V Output peak current repetitive (f > 10 Hz) 4.5 A Output peak current non repetitive 6 A Ptot Power dissipation (Tcase = 85 °C) 32 W Tstg, Tj Storage and junction temperature -40 to 150 °C VPEAK IO 3.2 Parameter Thermal data Table 4. Thermal data Symbol Rth j-case Parameter Thermal resistance junction to case Max. Value Unit 2 °C/W 3.3 Electrical characteristics Table 5. Electrical characteristics (VS = 14.4 V; RL = 4 Ω, f = 1 kHz, Tamb = 25 °C, unless otherwise specified) Symbol Parameter VS Supply voltage range Iq Total quiescent current Test condition Min. Typ. 8 60 Max. Unit 18 V 150 mA 120 mV VOS Output offset voltage ISB St-by current VST-BY = 1.5 V 100 μA ISBin St-by input Bias current VST-BY = 5 V 10 μA 1.5 V VSBon St-by on threshold voltage VSBoff St-by off threshold voltage ATTST-BY 3.5 St-by attenuation IM in Mute input bias current AM Mute attenuation V 90 (VMUTE = 5 V) dB 10 90 μA dB 5/11 Electrical specifications Table 5. TDA7391PD Electrical characteristics (continued) (VS = 14.4 V; RL = 4 Ω, f = 1 kHz, Tamb = 25 °C, unless otherwise specified) Symbol Parameter Test condition Min. Typ. 20 26 W d=1% 21 W d = 10 %; RL = 3.2 Ω 32 W VS = 13.7 V 40 W 0.06 % 0.03 % d = 10 % PO PO EIAJ d Output power EIAJ output power (*) Unit Distortion PO = 0.1 to 15 W GV Voltage gain fH High frequency rolloff 29.5 30 30.5 dB PO = 1 W; -3 dB 75 KHz Differential 36 60 KΩ Single Ended 30 55 KΩ RIN Input Impedance EIN Input noise voltage Rg = 0 Ω; f = 22 Hz to 22 kHz 4 mV Input common mode rejection f = 1 kHz; VIN = 1 Vrms 65 dB SVR Supply Voltage Rejection Rg = 0 Ω; Vr = 1 Vrms 60 dB CDL Clipping Detection Level 10 % Tsd Absolute Thermal Shutdown Junction Temperature 160 °C CMRR 3.4 Electrical characteristics curves Figure 4. Quiescent current vs. supply voltage 6/11 Max. Figure 5. EIAJ power vs. supply voltage TDA7391PD Electrical specifications Figure 6. Output power vs. supply voltage (@RL = 4Ω) Figure 7. Distortion vs. frequency (@ RL = 4Ω) Figure 8. Output power vs. supply voltage (@RL = 3.2Ω) Figure 9. Distortion vs. frequency (@ RL = 3.2Ω) Figure 10. Supply voltage rejection vs. frequency Figure 11. Common mode rejection vs. frequency 7/11 Electrical specifications Figure 12. Total power dissipation and effic. vs. output power (@RL = 4Ω) 8/11 TDA7391PD Figure 13. Power bandwidth TDA7391PD 4 Package information Package information In order to meet environmental requirements, ST (also) offers these devices in ECOPACK® packages. ECOPACK® packages are lead-free. The category of second Level Interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com. Figure 14. PowerSO-20 mechanical data and package dimensions DIM. mm MIN. TYP. A a1 inch MAX. MIN. TYP. 3.6 0.1 0.3 a2 0.004 0.012 3.3 0.130 a3 0 0.1 0.000 0.004 b 0.4 0.53 0.016 0.021 c 0.23 0.32 0.009 0.013 D (1) 15.8 16 0.622 0.630 D1 (2) 9.4 9.8 0.370 0.386 E 13.9 14.5 0.547 e 1.27 e3 E1 (1) 0.570 0.450 11.1 E2 0.429 0.437 2.9 0.114 E3 5.8 6.2 0.228 G 0 0.1 0.000 0.004 H 15.5 15.9 0.610 0.626 0.031 0.043 h L 0.244 1.1 0.8 1.1 0.043 N 8˚(typ.) S 8˚(max. ) T Weight: 1.9gr 0.050 11.43 10.9 OUTLINE AND MECHANICAL DATA MAX. 0.142 10 JEDEC MO-166 0.394 PowerSO-20 (1) “D and E1” do not include mold flash or protusions. - Mold flash or protusions shall not exceed 0.15mm (0.006”) - Critical dimensions: “E”, “G” and “a3”. (2) For subcontractors, the limit is the one quoted in jedec MO-166 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˚ 1 0 PSO20MEC D1 0056635 I 9/11 Revision history 5 TDA7391PD Revision history Table 6. Document revision history Date Revision 10-Oct-1998 1 Initial release. 2 Document reformatted. Document status promoted from product preview to datasheet. Added Table 1: Device summary. Added ECOPACK description in Section 4: Package information. 02-Jul-2008 10/11 Changes TDA7391PD Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no liability whatsoever relating to the choice, selection or use of the ST products and services described herein. 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