STPA008-QIX - 4x50W Class AB Audio Amplifier | STMicro
Артикул: STPA008-QIX ✗ Снят с производстваSTPA008-QIX Обзор
An audio power amplifier is an integrated circuit that converts low-level audio signals into high-current outputs capable of driving loudspeakers. The STPA008 belongs to the Class AB power-amplifier hierarchy, where the output transistors conduct for more than half of each signal cycle. Compared with a switching amplifier, this topology supports a conventional analog signal path and is specifically identified for high-power car-radio applications. Its MOSFET-based complementary output stage provides four amplification channels in one package.
Key verified features include four independent 50 W output stages, Class AB operation, a 6 V minimum operating supply, standby and mute functions, and an offset detector. The manufacturer describes the device as a low-voltage, high-sound-quality bridge-tied-load amplifier with improved GSM noise immunity. The Flexiwatt25 horizontal package is the -QIX ordering form identified by DigiKey, while the manufacturer datasheet also documents a distinct Flexiwatt27 option with clipping detection and a diagnostics output.
Technically, the quad-bridge architecture is intended to increase usable speaker output power and reduce the number of separate amplifier packages required in a multichannel head unit. The offset detector helps identify undesirable amplifier-channel DC offset. Features such as clipping detection and diagnostics output belong to the Flexiwatt27 configuration according to the manufacturer overview and should not be assumed to be present in the Flexiwatt25 -QIX device without checking the package-specific pinout.
Typical applications include automotive head units, car-radio systems, four-channel speaker arrangements, and low-voltage vehicle audio platforms. The 6 V operating capability is particularly relevant to start-stop vehicles, where engine shutdown can transiently reduce the battery voltage while audio equipment remains connected. System designers must still verify speaker impedance, thermal dissipation, supply layout, and automotive qualification requirements for the complete end product.
The most important design consideration is thermal management because a 4 x 50 W device can dissipate substantial power in a multi-channel bridge configuration. The 25-Flexiwatt package requires a correctly implemented PCB heat-spreading structure, and each channel must remain within its allowed output conditions. Input, output, supply, and return paths should be laid out to minimize coupling between four high-current output stages and sensitive audio inputs.
This product data consolidates the verified manufacturer overview, distributor identification, package information, and application details into an engineering-focused resource. It also distinguishes confirmed STPA008 capabilities from package-specific functions that require datasheet verification and explicitly identifies the absence of verified numeric pricing and drop-in substitute data.
Аналоги без доработки для STPA008-QIX — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
Для этого товара нет аналогов без доработки.
Запросить аналогиSTPA008-QIX Максимальные параметры и электрические характеристики
| Product Type | 4-channel quad-bridge Class AB audio power amplifier |
| Output Power | 4 x 50 W |
| Number of Amplifier Channels | 4 channels |
| Minimum Operating Supply Voltage | 6 V |
| Output Topology | Complementary MOSFET quad-bridge BTL |
| Amplifier Class | Class AB |
| Корпус | 25-Flexiwatt (Horizontal) |
| Тип монтажа | Surface Mount |
| Standby Control | Yes |
| Mute Control | Yes |
| Offset Detector | Yes |
| Clipping Detector | Not specified for the 25-Flexiwatt -QIX package |
| Diagnostics Output | Not specified for the 25-Flexiwatt -QIX package |
| GSM Noise Immunity | Excellent, as described by the manufacturer |
| Primary Application | High-power automotive car-radio systems |
Руководство по цоколевке STPA008-QIX в корпусе 25-flexiwatt (horizontal)
Цоколевка для STPA008-QIX (корпус 25-flexiwatt (horizontal)). Этот аналоговый компонент имеет выводы входа, выхода и питания. Обратитесь к техническому описанию производителя для конфигураций выводов балансировки нуля, коррекции и разрешения. Идеально подходит для схем обработки сигналов и усилителей.
Нет подробных данных о распиновке для STPA008-QIX.
Обратитесь к даташиту для полной конфигурации выводов.
Типичное применение
STPA008-QIX подходит для 6 применениеs: Automotive Head Unit Amplification, Start-Stop Vehicle Audio, Four-Channel BTL Speaker Drive, High-Power Car Radio, Automotive Multi-Zone Cabin Audio, Low-Voltage Vehicle Audio Supply Platform.
Automotive Head Unit Amplification
The STPA008-QIX fits automotive head units that require four 50 W-class audio outputs without using four separate power-amplifier packages. Its four independent Class AB channels and complementary MOSFET bridge architecture provide the channel density expected in a car-radio system, while standby and mute controls support centralized head-unit management. The verified manufacturer overview specifically identifies high-power car radio as the target application. Final design work must confirm the 25-Flexiwatt land pattern, speaker impedance, thermal performance, and automotive qualification requirements.
Рекомендуется
Start-Stop Vehicle Audio
The STPA008 is particularly relevant to start-stop vehicles because the manufacturer confirms operation down to a 6 V battery voltage. This lower operating capability addresses the reduced supply condition associated with engine stop while retaining a conventional Class AB audio path for speakers. The system designer must still protect the amplifier from automotive transients and verify sustained-output behavior at minimum supply voltage. A 4 x 50 W specification should not be interpreted as guaranteed simultaneous output under every battery, impedance, and thermal condition.
Рекомендуется
Four-Channel BTL Speaker Drive
The STPA008-QIX can drive four loudspeaker channels through its quad-bridge BTL arrangement, simplifying the allocation of audio power in a multi-zone vehicle cabin. Bridge-tied-load operation uses both sides of each channel to develop higher output voltage into the speaker load. Because the supported speaker impedance and simultaneous-output limits were not included in the supplied snippets, an engineer must consult the official datasheet before choosing the speakers. PCB routing must also keep four high-current outputs thermally and electromagnetically separated from sensitive inputs.
Рекомендуется
High-Power Car Radio
The STPA008-QIX is directly aligned with high-power car-radio systems because the manufacturer describes it as a MOSFET Class AB audio power amplifier designed for this market. Its four-channel architecture supports front and rear speaker groups, while standby and mute functions enable convenient head-unit power-state management. The amplifier also includes an offset detector for system diagnostics. A production implementation should use the official reference layout and validate speaker load, thermal rise, radio interference, and electromagnetic compatibility rather than relying only on the 4 x 50 W headline figure.
Рекомендуется
Automotive Multi-Zone Cabin Audio
A multi-zone cabin audio architecture can use the four independent channels of the STPA008-QIX for separate front and rear speaker groups or a customized distribution of amplifier channels. Independent Class AB amplification provides a conventional analog route for vehicle audio signals and avoids introducing a switching-conversion stage at the output. The implementation must account for channel-to-channel thermal sharing, ground bounce, speaker-load startup, mute behavior, and the offset-detection strategy. Exact channel assignments should be validated against the manufacturer test circuit and the vehicle speaker impedances.
Рекомендуется
Low-Voltage Vehicle Audio Supply Platform
The STPA008-QIX is suitable for a vehicle audio supply platform that must continue operating from a 6 V source during start-stop events. Its low-voltage capability supports OEM power specifications, while the four 50 W-class outputs provide sufficient class for high-power cabin systems. Supply protection remains outside the verified feature list, so the overall design should include appropriate transient and reverse-polarity handling where required. Engineers should confirm the amplifier's quiescent current, supply ramp behavior, and output limits from the official data before releasing the power architecture.
Рекомендуется
Справочные инженерные данные для STPA008-QIX — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар |
|---|---|
| Brand | STMicroelectronics |
| Package | 25-Flexiwatt (Horizontal) |
| Product Type | 4-channel Class AB audio power amplifier |
| Rated Output Power | 4 x 50 W |
| Minimum Operating Supply | 6 V |
| Output Configuration | Complementary MOSFET quad-bridge BTL |
| Standby Control | Yes |
| Mute Control | Yes |
| Offset Detector | Yes |
| Primary Application | High-power automotive car radio |
Ключевые отличия
- Low-voltage automotive operation (против Generic car-radio Class AB amplifier options)
- Four-channel integration (против Single-channel audio power amplifiers)
- Package-specific feature clarity (против Flexiwait27 STPA008 configurations)
Заметки по проектированию
Treat heat spreading as a primary layout requirement because the STPA008-QIX combines four 50 W-class outputs in 25-Flexiwatt. Follow the manufacturer's land-pattern and copper-area recommendations rather than relying on the exposed package tab alone. Check every channel's simultaneous dissipation against the maximum junction and ambient limits from the official datasheet. The verified search excerpts do not provide junction temperature, thermal resistance, or allowable power dissipation, so numerical heat-sink sizing cannot be completed without those values.
Use the official 25-Flexiwatt PCB footprint and place input, supply, output, and ground connections to minimize loop area. Keep the four high-current speaker returns separate from low-level audio grounds as far as the circuit permits. Provide short, wide copper paths and a low-impedance ground reference because high-current output transients can otherwise disturb the amplifier's audio input and vehicle electronics. Do not substitute the Flexiwait27 land pattern without a complete package and pinout review.
Do not assume that the Flexiwait27 clipping detector or diagnostics output is available in the Flexiwait25 STPA008-QIX. The manufacturer overview explicitly limits those functions to Flexiwait27. Also avoid interpreting 4 x 50 W as guaranteed simultaneous output regardless of supply voltage, speaker impedance, cooling, or signal content. Confirm the valid operating region, permitted load impedance, quiescent behavior, and thermal limits directly from the package-specific datasheet before production release.
The manufacturer's description highlights excellent GSM noise immunity, but that does not remove the need for sound PCB design. Route sensitive input pins away from output and supply-current paths, use a continuous ground reference, and minimize exposed copper carrying high-frequency switching or transient currents. Validate the completed module for conducted and radiated emissions in its final vehicle configuration because surrounding harness, antenna, and power-supply details can materially change system-level EMI performance.
Информация о соответствии
The supplied verified snippets identify an automotive infotainment application but do not provide explicit RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals statements. These fields remain unknown rather than being inferred from the automotive application.
