TDA2005
25Pages

Catalog excerpts

TDA2005 20 W bridge/stereo amplifier for car radio Datasheet  production data High output power: – Po = 10 + 10 W @ RL = 2 , THD = 10 % – Po = 20 W @ RL = 4 , THD = 10 %. Protection against: – Output DC and AC short circuit to ground – Overrating chip temperature – Load dump voltage surge – Fortuitous open ground – Very inductive loads Loudspeaker protection during short circuit for one wire to ground Description The TDA2005 is a class B dual audio power amplifier in Multiwatt11 package specifically designed for car radio applications. Table 1. Power booster amplifiers can be easily designed using this device that provides a high current capability (up to 3.5 A) and can drive very low impedance loads (down to 1.6  in stereo applications) obtaining an output power of more than 20 W (bridge configuration). Device summary Order code September 2013 This is information on a product in full production.

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Schematic and pins connection diagrams . . . . . . . . . . . . . . . . . . . . . . . 5 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Bridge amplifier section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.3.1 2.3.2 Electrical characteristics (bridge application) . . . . . . . . . . . . . . . . . . . . . . 7 Bridge amplifier design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Stereo amplifier application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....

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List of tables Table 1. Table 2. Table 3. Table 4. Table 5. Table 6. Table 7. Table 8. Table 9. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Electrical characteristics (bridge application) . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....

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List of figures Figure 1. Figure 2. Figure 3. Figure 4. Figure 5. Figure 6. Figure 7. Figure 8. Figure 9. Figure 10. Figure 11. Figure 12. Figure 13. Figure 14. Figure 15. Figure 16. Figure 17. Figure 18. Figure 19. Figure 20. Figure 21. Figure 22. Figure 23. Figure 24. Figure 25. Figure 26. Figure 27. Figure 28. Figure 29. Figure 30. Figure 31. Figure 32. Figure 33. Figure 34. Figure 35. Figure 36. Figure 37. Figure 38. Figure 39. Figure 40. Schematic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Pins connection...

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Schematic and pins connection diagrams Schematic and pins connection diagrams Figure 1. Schematic diagram Pins connection diagram (top view)

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Electrical specifications Electrical specifications Absolute maximum ratings Table 2. Absolute maximum ratings Peak supply voltage (50 ms) Operating supply voltage Output peak current (non repetitive t = 0.1 ms) Output peak current (repetitive f 10 Hz) Power dissipation at Tcase = 60 °C Storage and junction temperature 1. The max. output current is internally limited. Thermal data Table 3. Thermal data Symbol Rth-j-case Parameter Thermal resistance junction-to-case Bridge amplifier section Figure 3. Test and application circuit (bridge amplifier)

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Electrical specifications Figure 4. PC board and components layout of Figure 3 Electrical characteristics (bridge application) Refer to the bridge application circuit Tamb = 25°C; Gv = 50dB; Rth(heatsink) = 4°C/W unless otherwise specified. Electrical characteristics (bridge application) Parameter Test condition Supply voltage Output offset voltage (between pin 8 and pin 10) Total quiescent drain current Output power Total harmonic distortion Input sensitivity Input resistance High frequency roll off (-3 dB) Closed loop voltage gain Total Input noise voltage Supply voltage rejection

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Electrical specifications Table 4. Electrical characteristics (bridge application) (continued) Test condition Supply voltage rejection Thermal shut-down junction temperature Output voltage with one side of the speaker shorted to ground Output offset voltage vs. supply voltage Distortion vs. output power (RL = 3.2 )

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Electrical specifications Bridge amplifier design The following considerations can be useful when designing a bridge amplifier. Table 5. Bridge amplifier design Parameter Single ended Peak output voltage (before clipping) Peak Output current (before clipping) RMS output power (before clipping) Where: VCE sat = output transistors saturation voltage VS = allowable supply voltage RL = load impedance Voltage and current swings are twice for a bridge amplifier in comparison with single ended amplifier. In other words, with the same RL the bridge configuration can deliver an output power that is...

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Electrical specifications For sufficiently high gains (40 to 50 dB) it is possible to put R2 = R4 and R3 = 2R1, simplifying the formula in: R1 G v = 4 -----R2 Table 6. Stereo amplifier application Figure 9. Bridge configuration Typical stereo application circuit

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Electrical specifications Electrical characteristics (stereo application) Refer to the stereo application circuit Tamb = 25 °C; Gv = 50 dB; Rth(heatsink) = 4°C/W unless otherwise specified Electrical characteristics (stereo application) Test condition Supply voltage Quiescent offset voltage Total quiescent drain current Output power (each channel) Total harmonic distortion Cross talk Input saturation voltage Input sensitivity Input resistance High frequency roll off (-3 dB) Open loop voltage gain Gv Closed loop voltage gain

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Electrical specifications Table 7. Electrical characteristics (stereo application) (continued) Test condition Closed loop gain matching Total input noise voltage Supply voltage rejection Figure 10. Quiescent output voltage vs. supply voltage (stereo amplifier) Figure 11. Quiescent drain current vs. supply voltage (stereo amplifier) Figure 12. Distortion vs. output power (stereo Figure 13. Output power vs. supply voltage, amplifier) RL = 2 and 4 (stereo amplifi

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