this is information on a product in full production. july 2014 docid026688 rev 1 1/25 STPA003 4 x 52 w quad bridge power amplifier with high side driver and low voltage operation datasheet - production data features ? high output power capability: ? 4 x 52 w/4 max. ? 4 x 30 w/4 @ 14.4 v, 1 khz, 10 % ? 4 x 85 w/2 max. ? 4 x 55 w/2 @ 14.4v, 1 khz, 10 % ? mosfet output power stage ? capable to operate in low voltage conditions (e.g.: ?start - stop?) ? excellent gsm noise immunity ? excellent 2 driving capability ? hi-fi class distortion ? low output noise ? standby function and mute function ? automute at min. supply voltage detection ? low external component count: ? internally fixed gain (26 db) ? no external compensation ? no bootstrap capacitors ? on board 0.4 a high side driver ? protections: ? output short circuit to gnd, to v s , across the load ? very inductive loads ? overrating chip temperature with soft thermal limiter ? output dc offset detection ? load dump voltage ? fortuitous open gnd ? reversed battery ? esd description the STPA003 is a mosfet class ab audio power amplifier, designed for high-power car radio. in addition to the outstanding output current capability and distortion performance, the STPA003 is extremely robust against several kinds of fortuitous misconnection. it is compliant to the most recent oem specifications for low voltage operation (the so called 'start-stop' battery profile during engine stop). it includes a dc offset detector and, in flexiwatt27 package, a high side driver or a clipping detector. ' ! 0 ' 0 3 ' ! 0 ' 0 3 flexiwatt25 flexiwatt27 table 1. device summary order code package packing STPA003od-4wx flexiwatt25 (with od) tube STPA003cd-48x flexiwatt27 (with cd) tube STPA003hsd-48x flexiwatt27 (with hsd) tube www.st.com
contents STPA003 2/25 docid026688 rev 1 contents 1 overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.1 block diagram and application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2 pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 3 electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 3.1 absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 3.2 thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 3.3 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 4 electrical characteristics typical curves . . . . . . . . . . . . . . . . . . . . . . . . 13 5 general information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 5.1 operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 5.2 battery variations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 5.2.1 low voltage operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 5.2.2 cranks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 5.2.3 advanced battery management (hybrid vehicles) . . . . . . . . . . . . . . . . . 18 5.3 protections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 5.3.1 short circuits and open circuit operation . . . . . . . . . . . . . . . . . . . . . . . . 19 5.3.2 over-voltage and load dump protection . . . . . . . . . . . . . . . . . . . . . . . . . 19 5.3.3 thermal protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 5.4 warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 5.4.1 dc offset detection (od pin) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 5.4.2 clipping detection and diagnostics (cd-diag pin) . . . . . . . . . . . . . . . . 20 5.5 heat sink definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 6 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 7 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
docid026688 rev 1 3/25 STPA003 list of tables 3 list of tables table 1. device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 table 2. pin functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 table 3. absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 table 4. thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 table 5. electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 table 6. document revision history. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
list of figures STPA003 4/25 docid026688 rev 1 list of figures figure 1. block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 figure 2. standard test and application circuit (flexiwatt25 with od) . . . . . . . . . . . . . . . . . . . . . . . . . 6 figure 3. standard test and application circuit (flexiwatt25 with hsd) . . . . . . . . . . . . . . . . . . . . . . . . 6 figure 4. standard test and application circuit (flexiwatt27 with cd) . . . . . . . . . . . . . . . . . . . . . . . . . 7 figure 5. standard test and application circuit (flexiwatt27 with hsd) . . . . . . . . . . . . . . . . . . . . . . . . 7 figure 6. pin connections (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 figure 7. quiescent current vs. supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 figure 8. output power vs. supply voltage (4 ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 figure 9. output power vs. supply voltage (2 ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 figure 10. distortion vs. output power (4 ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 figure 11. distortion vs. output power (2 ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 figure 12. distortion vs. frequency (4 ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 figure 13. distortion vs. frequency (2 ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 figure 14. distortion vs. output power (4 , vs = 6 v). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 figure 15. distortion vs. output power (2 , vs = 6 v). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 figure 16. supply voltage rejection vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 figure 17. crosstalk vs. frequency. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 figure 18. total power dissipation & efficiency vs. po (4 , sine) . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 figure 19. power dissipation vs. average output power (4 , audio program simulation). . . . . . . . . . 15 figure 20. power dissipation vs. average output power (2 , audio program simulation). . . . . . . . . . 15 figure 21. itu r-arm frequency response, weighting filter for transient pop. . . . . . . . . . . . . . . . . . . 15 figure 22. svr charge diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 figure 23. battery cranking curve example 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17 figure 24. battery cranking curve example 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18 figure 25. upwards fast battery transitions diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 8 figure 26. load dump protection diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19 figure 27. thermal protection diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 figure 28. audio section waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 figure 29. flexiwatt25 (vertical) mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . . 22 figure 30. flexiwatt27 (vertical) mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . 23
docid026688 rev 1 5/25 STPA003 overview 24 1 overview the STPA003 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 high side driver or a clipping detection pin with diagnostics information is present. in flexiwatt25, the user can choose to have the offset detector or the high side driver on pin 25. 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 STPA003 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 and application circuit figure 1. block diagram ) . m & - 5 4 % 3 4
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