STA540 4 x 13 W dual/quad power amplifier Datasheet − production data High output power capability – 2x 38 W into 4 Ω at 18 V, 1 kHz, 10% THD – 2x 34 W into 8 Ω at 22 V, 1 kHz, 10% THD – 2x 24W into 4Ω at 14.4 V, 1 kHz, 10% THD – 2x 15 W into 8 Ω at 16 V, 1 kHz, 10% THD – 4x 13 W into 2 Ω at 15 V, 1 kHz, 10% THD – 4x 11 W into 4 Ω at 18 V, 1 kHz, 10% THD – 4x 7 W into 4 Ω at 14.4 V, 1 kHz, 10% THD Minimum external components count: – no bootstrap capacitors – no Boucherot cells – internally fixed gain 20 dB Standby function (CMOS compatible) No audible pop during standby operations Diagnostic facilities: – clip detector – output to GND short-circuit detector – output to VS short-circuit detector – soft short-circuit check at turn-on – thermal shutdown warning The STA540 is a 4-channel, class-AB audio amplifier designed for high quality sound applications. The amplifiers have single-ended outputs with integrated short-circuit protection, thermal protection and diagnostic functions. The chip is housed in the 15-pin Multiwatt ECOPACK® Pb-free package which is RoHS (2002/95/EC) compliant. Output AC/DC short circuit Soft short-circuit check at turn-on Thermal cutoff/limiter to prevent chip from overheating High inductive loads Device summary April 2012 This is information on a product in full production. Packing Tube

Block diagram and pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 1.1 1.2 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Standard application circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Electrical characteristics curves . . . . . . . . . . . . . . . . . . . . . ....

Handling the diagnostic information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

List of tables Table 1. Table 2. Table 3. Table 4. Table 5. Table 6. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....

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. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Pin connection (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....

Block diagram and pin description Block diagram and pin description Block diagram Figure 1. DIAGNOSTIC DIAGNOSTICD OUTPUT

Block diagram and pin description S-GND S-GND P-GND PW-GND ST-BY STAND-BY Power supply Supply voltage rejection Power ground Signal ground Diagnostics output Power supply

Electrical specifications Electrical specifications Absolute maximum ratings Table 3. Absolute maximum ratings Supply voltage idle mode (no signal) Supply voltage operating Supply voltage AC-DC short safe Total power dissipation (Tcase = 85 °C) Rth j-case Thermal resistance junction to case (max) Rth j-amb Thermal resistance junction to ambient (max) Storage and junction temperature Operating temperature Thermal data Table 4. Thermal data Electrical characteristics The test conditions are VS = 14.4 V, RL = 4 Ω, f = 1 kHz, Tamb = 25° C unless otherwise specified. Table 5. Symbol Electrical characteristics...

Electrical specifications Table 5. Symbol Electrical characteristics (continued) Parameter Test condition f = 1 kHz single-ended f = 10 kHz single-ended f = 1 kHz BTL f = 10 kHz BTL Input impedance Voltage gain Voltage gain match Rgen = 0, "A" weighted, S.E.: Non-inverting channels Inverting channels Input noise voltage Supply voltage rejection Standby attenuation Current consumption in standby ST-BY OUT threshold voltage ST-BY IN threshold voltage VSB Play mode, VST-BY = 5 V Max driving current under fault Clipping detector output average current Clipping detector output average current VDIAGNO...

Standard application circuits Standard application circuits Figure 3. Suggested applications: 4x 13 W into 2 Ω, at 15 V 4x 11 W into 4 Ω, at 18 V 4x 9 W into 2 Ω, at 12 V 4x 8 W into 4 Ω, at 16 V 4x 5 W into 4 Ω, at 12 V Alternative single-ended speaker connection The best audio performance is obtained with the configuration where each speaker has its own DC blocking capacitor. However, if the application allows a little degradation of the spatial image it is possible to connect a couple of speakers with only one low-value DC blocking capacitor. Suggested applications: 2x 38 W into 4 Ω, at 18...

Standard application circuits Figure 6. Stereo plus bridge drive 10 kΩ OUT_L OUT_R Suggested applications: 2x 9 W into 2 Ω, +1x 18 W into 4 Ω, at 12 V 2x 12 W into 2 Ω, +1x 26 W into 4 Ω, at 14.4 V 2x 8 W into 4 Ω, +1x 16 W into 8 Ω, at 16 V

Electrical characteristics curves 4 Electrical characteristics curves Figure 7. Quiescent drain current versus Figure 8. Quiescent output voltage versus supply voltage (single-ended and supply voltage (single-ended and bridge) bridge)