TDA7385 STMicroelectronics, TDA7385 Datasheet
TDA7385
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TDA7385 Summary of contents
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... Description The TDA7385 class audio power amplifier, packaged in Flexiwatt 25 and designed for high end car radio applications. Based on a fully complementary PNP/NPN configuration, the TDA7385 allows a rail to rail , across the output voltage swing with no need of bootstrap S capacitors. The extremely reduced boundary components count allows very compact sets ...
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... Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.4 PCB and component layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.5 Electrical characteristic curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 3 Application hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 3.1 Biasing and SVR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 3.2 Input stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 3.3 Standby and muting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 3.4 Diagnostics facility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 3.5 Stability and layout considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 4 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 5 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 2/17 TDA7385 ...
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... TDA7385 List of tables Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Table 2. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Table 3. Thermal data Table 4. Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Table 5. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 List of tables 3/17 ...
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... Supply voltage rejection vs. frequency by varying Figure 12. Output noise vs. source resistance Figure 13. Power dissipation and efficiency vs. output power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Figure 14. Input/output biasing Figure 15. Diagnostics circuit Figure 16. Clipping detection waveforms Figure 17. Diagnostics waveforms Figure 18. Fault detection circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Figure 19. Flexiwatt25 mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 4/17 TDA7385 ...
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... TDA7385 1 Block and pin connection diagrams Figure 1. Block diagram ST-BY MUTE IN1 0.1μF IN2 0.1μF IN3 0.1μF IN4 0.1μF Figure 2. Pin connection (top view) Vcc1 Vcc2 AC-GND SVR TAB 0.1μF 47μF 1 Block and pin connection diagrams 2.200μ ...
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... L amb Test condition THD = 10% THD = 1% THD = 10 13.2V S THD = 1 13. 14. Value 4.5 5.5 80 150 – 150 Value max °C; Refer to the test and application Min. Typ. Max. 180 300 100 16 0.04 0.3 TDA7385 Unit °C °C Unit °C/W Unit ...
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... TDA7385 Table 4. Electrical characteristics (continued 14 kHz diagram (Figure 3), unless otherwise specified.) Symbol Parameter e Output noise No SVR Supply voltage rejection f Low cut-off frequency cl f High cut-off frequency ch R Input impedance i C Cross talk T Standby current I SB consumption Standby out threshold V SB out ...
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... Electrical specifications 2.4 PCB and component layout Referred to Figure 3: Standard test and application Figure 4. Components and top copper layer Figure 5. Bottom copper layer 8/17 circuit. TDA7385 TDA7385 ...
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... TDA7385 2.5 Electrical characteristic curves Figure 6. Quiescent current vs. supply voltage Figure 8. Output power vs. supply voltage (4Ω) Figure 10. Distortion vs. frequency Electrical specifications Figure 7. Quiescent current vs. supply voltage Figure 9. Distortion vs. output power Figure 11. Supply voltage rejection vs. frequency by varying 600 1Vrms ripple 9/17 ...
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... Electrical specifications Figure 12. Output noise vs. source resistance Figure 13. Power dissipation and efficiency 10/17 vs. output power P (W) tot P TDA7385 tot ...
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... The TDA7385’s inputs are ground-compatible and can stand very high input signals (± 8 Vpk) without any performances degradation. If the standard value for the input capacitors (0.1 µF) is adopted, the low frequency cut-off will amount to 16 Hz. Figure 3. 14, all the TDA7385’s main sections, such as Inputs, Outputs AND AC ...
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... About the stand-by, the time constant to be assigned in order to obtain a virtually pop-free transition has to be slower than 2.5V/ms. 3.4 Diagnostics facility The TDA7385 is equipped with a diagnostics circuitry able to detect the following events: ● Clipping in the output stage ● overheating (thermal shut-down proximity) ● ...
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... Stability and layout considerations If properly layouted and hooked to standard car-radio speakers, the TDA7385 will be intrinsically stable with no need of external compensations such as output R-C cells. Due to the high number of channels involved, this translates into a very remarkable components saving if compared to similar devices on the market. ...
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... Figure 18. Fault detection circuit 14/17 D95AU304 VREF VREF1 TDA7385 VREF2 T1 << T2 VREF ≥ VREF1 >> VREF2 CLIPPING SHORT TO GND THERMAL PROXIMITY CLIP DET. (TO GAIN - COMPRESSOR/ + TONE CONTROL) FAULT, THERMAL SHUTDOWN - (TO POWER SUPPLY SECTION, μP VOLTAGE + REGULATOR, FLASHING SYSTEM) D95AU305 TDA7385 ...
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... TDA7385 4 Package information In order to meet environmental requirements, ST (also) offers these devices in ECOPACK packages. ECOPACK 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 trademark. ECOPACK specifications are available at: www.st.com. ...
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... Revision history 5 Revision history Table 5. Document revision history Date 10-Mar-2001 13-Nov-2008 16/17 Revision 1 Initial release. Document reformatted. Added Table 1: Device summary on page 2 Updated Table 4: Electrical characteristics on page Updated Section 4: Package information on page TDA7385 Changes 1. 6. 15. ...
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... TDA7385 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. ...