STPA008-48X - 4x50W Class AB Audio Amplifier | ST
MPN: STPA008-48X ✓ نشطSTPA008-48X نظرة عامة
An audio power amplifier converts low-level audio signals into a current and voltage capable of driving loudspeakers. The STPA008 belongs to the Class AB amplifier hierarchy, where output devices conduct continuously to reduce crossover distortion compared with Class D designs. It also sits within the broader automotive audio power-amplifier category. Its four independent channels make it suitable for conventional four-speaker systems using bridge-tied-load outputs, while its diagnostic features help system designers identify faults in complex vehicle audio installations.
Key characteristics include a fully complementary P-channel and N-channel MOSFET output stage, rail-to-rail output-voltage swing, high output current, minimized saturation losses, low-voltage operation down to 6 V, standby and mute control, offset detection, clipping detection, and a diagnostics output. The manufacturer describes the architecture as providing high sound quality and excellent GSM-noise immunity, which are useful attributes in automotive environments where radio-frequency interference can otherwise affect audio playback.
The STPA008-48X targets high-power car-radio and automotive infotainment applications rather than portable headphone outputs or very small consumer speakers. Four independent Class AB channels allow a compact solution for multi-speaker vehicle systems without requiring four separate monolithic amplifier packages. The vertical 27-Flexiwatt package is intended for PCB mounting and careful thermal design; class-AB dissipation and automotive ambient conditions must be considered when sizing copper areas and heat spreading.
Engineers should follow the manufacturer’s reference layout and pin-connection requirements, preserve the intended bridge-tied-load topology, and decouple supply rails close to the device. The offset detector, clipping detector, standby pin, mute pin, and diagnostics output must be connected according to the datasheet. The 6 V minimum supply supports start-stop systems, but headroom above 6 V is generally necessary to achieve the specified 4 x 50 W output without entering clipping or thermal limits.
This product summary combines the verified STMicroelectronics product information with distributor availability, package details, application guidance, and the only identified cross-brand comparison candidate. It distinguishes confirmed device attributes from package drawings and electrical values that could not be independently verified from the supplied search results.
بدائل مباشرة لـ STPA008-48X — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع STPA008-48X (نفس عامل الشكل والبصمة) — يختلف في Mounting Type, Package, RoHS Status.
TDA7850
✅ بديل مباشر✓ متوفر في المخزون
$5.5 / وحدة
عرض ورقة البيانات ←STPA008-48X الحدود القصوى والخصائص الكهربائية
| Number of Output Channels | 4 channels |
| تكوين الخرج | 4 independent bridge-tied-load amplifiers |
| Amplifier Class | Class AB |
| Rated Output Power | 4 x 50 W |
| Minimum Operating Supply Voltage | 6 V |
| Output Transistor Technology | Complementary MOSFET P-channel and N-channel |
| Output Swing | Rail-to-rail |
| العلبة | 27-Flexiwatt vertical power package |
| نوع التركيب | Surface-mount PCB package |
| Standby Control | 1 standby control pin |
| Mute Control | 1 mute control pin |
| Offset Detection | 1 offset detector |
| Clipping Detection | 1 clipping detector in the Flexiwatt27 package |
| Diagnostics Output | 1 diagnostics output in the Flexiwatt27 package |
| Primary Application | High-power car-radio audio systems |
| Automotive Noise Rejection | GSM-noise immunity |
| حالة RoHS | unknown |
| REACH Status | unknown |
| AEC-Q100 Status | unknown |
دليل تكوين أطراف STPA008-48X 27-flexiwatt vertical power package
تكوين الأطراف لـ STPA008-48X (حزمة 27-flexiwatt vertical power package). يتميز هذا المكوّن التناظري بأطراف الإدخال والإخراج وإمداد الطاقة. راجع ورقة بيانات الشركة المصنعة لتكوينات طرف إلغاء الإزاحة والتعويض والتمكين. مثالي لدوائر تكييف الإشارة والمضخمات.
لا تتوفر بيانات مفصلة لمخطط التوصيلات لـ STPA008-48X.
راجع ورقة البيانات للحصول على تكوين الأطراف الكامل.
التطبيقات النموذجية
STPA008-48X مناسب لـ 6 التطبيقs: Automotive Car-Radio Audio, Automotive Infotainment Multi-Speaker System, Four-Channel Bridge-Tied-Load Speaker Drive, Low-Voltage Start-Stop Head Unit, Automotive Speaker Fault Diagnostics, High-Power Vehicle Audio Upgrade.
Automotive Car-Radio Audio
The STPA008-48X fits a conventional four-speaker car-radio design because it integrates four independent 4 x 50 W Class AB amplifier channels in one 27-Flexiwatt vertical package. Its MOSFET output stage supports rail-to-rail swing and high output current, while operation down to 6 V suits start-stop battery profiles. The system benefits from standby and mute control, offset detection, clipping detection, diagnostics, and documented GSM-noise immunity. Designers should use the manufacturer reference layout and provide adequate PCB copper for class-AB thermal dissipation.
موصى به
Automotive Infotainment Multi-Speaker System
The STPA008-48X is suitable for automotive infotainment systems requiring four independent amplified channels for front and rear speakers. Its 4 x 50 W Class AB architecture avoids the high-frequency switching conversion used by Class D stages, which can simplify audio filtering in radio-oriented systems. The 6 V minimum operating capability supports reduced-voltage vehicle conditions, while standby and mute simplify state control. Thermal design remains critical because class-AB dissipation increases with the voltage difference between the battery rail and amplified speaker signal.
موصى به
Four-Channel Bridge-Tied-Load Speaker Drive
The STPA008-48X provides four independent bridge-tied-load channels, allowing each channel to drive a speaker without a speaker-side ground connection. According to the manufacturer datasheet, its complementary P-channel and N-channel MOSFET outputs provide high output current and rail-to-rail swing. This topology suits four-speaker automotive installations when the selected speaker impedance, power rating, and amplifier thermal limit are compatible. PCB routing must preserve the bridge output impedance and provide a low-impedance return path to the device ground and supply references.
موصى به
Low-Voltage Start-Stop Head Unit
The STPA008-48X is specifically relevant to start-stop head units because the manufacturer confirms operation down to a 6 V battery supply. This low-voltage capability helps preserve audio function during engine-stop profiles where conventional amplifiers may enter undervoltage shutdown. The device still requires sufficient supply headroom to meet its 4 x 50 W rating and should be validated across battery transients, cranking events, and automotive EMI conditions. Its GSM-noise immunity also supports radio-oriented installations affected by mobile-device interference.
موصى به
Automotive Speaker Fault Diagnostics
The STPA008-48X suits automotive systems that need basic output-stage monitoring because the Flexiwatt27 implementation includes offset detection, clipping detection, and a diagnostics output. These functions can support system-level checks of abnormal DC offset and overdrive conditions in a multi-speaker audio installation. The diagnostics circuitry must be connected and interpreted according to the official datasheet rather than treated as a complete speaker load tester. Firmware can use the signals to report faults while standby and mute controls manage normal amplifier state transitions.
موصى به
High-Power Vehicle Audio Upgrade
The STPA008-48X can be used in aftermarket or OEM vehicle audio designs that require substantially more output than a small integrated audio amplifier can provide. Four 50 W channels allow separate front and rear speaker amplification in a single package, while standby and mute simplify integration with a head-unit control line. The class-AB topology supports low distortion without switching-stage EMI filtering at the speaker output. Installation still requires stable battery wiring, correctly sized return paths, speaker protection, and a thermal layout that accounts for the package's heat dissipation.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ STPA008-48X — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | TDA7850 |
|---|---|---|
| Brand | STMicroelectronics | Texas Instruments |
| Output Channels | 4 channels | 4 channels |
| Rated Output Power | 4 x 50 W | 4 x 50 W |
أبرز الفروقات
- Low-voltage automotive operation (مقابلTDA7850)
- Integrated Flexiwatt27 diagnostics (مقابلTDA7850)
- Documented GSM-noise immunity (مقابلTDA7850)
- Four-channel integrated output stage (مقابلTDA7850)
ملاحظات التصميم
Class-AB dissipation depends on both load current and the difference between the supply rail and speaker output voltage. Estimated: using Pdiss = (VIN - VOUT) x IOUT, a 12 V supply, 5 V average output, and 2 A average channel current produces approximately 14 W per channel. This is an engineering estimate rather than a datasheet value; use the official thermal data and measured worst-case signal envelope to size copper areas and establish the required operating-temperature margin.
Follow the manufacturer's Flexiwatt27 land pattern and reference layout exactly, including the exposed thermal area and its connection to ground or copper. Place input, output, and supply connections with short, wide paths to reduce resistance and inductance. The bridge-tied-load topology requires careful return-current routing, and abnormal output impedance or an open speaker can cause severe dissipation. Confirm all pin assignments against the official STMicroelectronics datasheet before releasing artwork.
Do not assume that a 6 V minimum operating voltage guarantees the full 4 x 50 W output at 6 V; available output depends on supply headroom, output swing, load impedance, and thermal conditions. Also do not infer complete pin compatibility from similar output-power ratings. A replacement must be checked pin by pin, including supply, ground, outputs, standby, mute, clipping, offset, diagnostics, exposed-pad connections, absolute maximum ratings, and short-circuit behavior.
معلومات الامتثال
The supplied data identifies an automotive car-radio application but does not explicitly state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. These fields remain unknown rather than inferred.
