PDF《STPA002》

13 Figure 15. Crosstalk vs. frequency.13 Figure 16. Total power dissipation &

efficiency vs. Po (4 Ω, Sine)13 Figure 17. Power dissipation vs. average output power (4 Ω, audio program simulation)14 Figure 18. Power dissipation vs. average output power (2 Ω, audio program simulation)14 Figure 19. ITU R-ARM frequency response, weighting filter for transient pop.14 Figure 20. SVR charge diagram.15 Figure 21. Battery cranking curve example 1.16 Figure 22. Battery cranking curve example 2.17 Figure 23. Upwards fast battery transitions diagram

17 Figure 24. Load dump protection diagram

18 Figure 25. Thermal protection diagram

18 Figure 26. Audio section waveforms

19 Figure 27. Flexiwatt25 (vertical) mechanical data and package dimensions.21 Figure 28. Flexiwatt27 (Vertical) mechanical data and package dimensions

22 DocID024368 Rev

3 5/24 STPA002 Overview

23 1 Overview The STPA002 is a complementary quad audio power amplifier. It is available in two different packages, Flexiwatt25 and Flexiwatt27. It embeds four independent amplifiers working in class AB, a standby, a mute pin and an offset detector output. In the Flexiwatt27 package also a clipping detection pin with diagnostics information is available. The amplifier is fully operational down to a battery voltage of

6 V, without producing pop noise and continuing to play during battery transitions. The STPA002 can drive

2 ohm loads and has a very high immunity to disturbs without need of external components or compensation. It is protected against any kind of short or open circuit, over-voltage and over-temperature. 1.1 Block diagram Figure 1. Block diagram ). M&

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03 Overview STPA002 6/24 DocID024368 Rev

3 1.2 Application circuits Figure 2. Standard test and application circuit (Flexiwatt25) Figure 3. Standard test and application circuit (Flexiwatt27) '

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3 7/24 STPA002 Pin description

23 2 Pin description Figure 4. Pin connections (top view) '

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8 Pin description STPA002 8/24 DocID024368 Rev

3 Table 2. Pin functions Pin number FW27 Pin number FW25 Pin name Description

1 1 TAB Device slug connection

2 25 OD Offset detector output

3 2 PW-GND2 Channel 2, output power ground

4 3 OUT2- Channel 2, negative output