STA350BW - 2.1-Channel Digital Audio System | STMicroelectronics
Teilenummer: STA350BW ✓ AktivSTA350BW Übersicht
A digital audio system combines signal processing, amplifier control, and power-stage conversion into one integrated device. Within the broader semiconductor hierarchy, the STA350BW belongs to the power-management IC class and specifically serves as a digital Class-D audio amplifier and Sound Terminal. This integration reduces the number of separate blocks required for a compact audio output stage while retaining programmable audio processing.
The STA350Bx family provides up to 8 programmable biquads per channel for equalization. Four power outputs support multi-channel and 2.1-channel system configurations. The supplied test condition of VCC = 24 V, f = 1 kHz, fsw = 384 kHz, ambient temperature of 25°C, and RL = 8 Ω provides a defined basis for comparing datasheet specifications; results obtained under different conditions should not be treated as directly equivalent.
The device integrates digital audio processing, digital amplifier control, and the FFX output architecture into a single high-power sound-terminal solution. Its four-output architecture provides flexibility for stereo, multi-channel, or subwoofer arrangements, while the digital equalization capability permits channel-specific tonal shaping. The package includes an exposed pad that must be handled according to the manufacturer’s thermal and layout guidance.
Typical applications include compact active speakers, multimedia speaker systems, home-theater sound terminals, powered subwoofers, and consumer audio products requiring multiple amplified outputs. In these systems, the integrated processing and output stage can simplify the signal chain compared with a design that uses separate DSP, amplifier-control, and power-amplifier blocks. The 75 W output capability is particularly relevant to compact high-power speaker enclosures.
The principal design consideration is thermal management. The exposed pad is integral to heat dissipation and must be connected to a suitable copper area according to the manufacturer datasheet. Designers should also maintain the required input, output, filtering, and decoupling layout, preserve the specified switching conditions, and account for the difference between the 26 V operating range and 30 V absolute maximum rating.
This product page consolidates the verified manufacturer specifications, distributor availability information, package details, and engineering guidance for the STA350BW. It also distinguishes directly documented characteristics from parameters that require confirmation from the complete datasheet, helping engineers evaluate thermal design and replacement decisions without inferring unverified compatibility.
Drop-in-Alternativen für STA350BW – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Für dieses Produkt sind keine Drop-in-Alternativen verfügbar.
Alternativen anfordernSTA350BW Grenzwerte & elektrische Eigenschaften
| Product Type | 2.1-channel high-efficiency digital audio system |
| Architecture | Digital audio processing, digital amplifier control, and FFX power output stage |
| Channel Configuration | 2.1 channels |
| Number of Power Outputs | 4 outputs |
| Maximum Demonstrated Output Power | 75 W into 4 Ω at VCC = 25 V, 1 channel |
| Betriebsversorgungsspannung | 26 V maximum operating range |
| Absolute Maximum Supply Voltage | 30 V |
| Programmable Biquads | Up to 8 per channel |
| Gehäuse | PowerSSO-36 with exposed pad down |
| Package Type | PowerSSO-36 EPD |
| Montageart | Surface mount |
| Datasheet Test Supply Voltage | 24 V |
| Datasheet Test Frequency | 1 kHz |
| Datasheet Test Switching Frequency | 384 kHz |
| Datasheet Test Load Resistance | 8 Ω |
| Datasheet Test Ambient Temperature | 25°C |
STA350BW powersso-36 epd Pinbelegungsleitfaden
Pinbelegung für STA350BW (powersso-36 epd-Gehäuse). Dieses analoge Bauteil verfügt über Eingangs-, Ausgangs- und Versorgungspins. Offset-Null-, Kompensations- und Enable-Pin-Konfigurationen entnehmen Sie dem Herstellerdatenblatt. Ideal für Signalaufbereitung und Verstärkerschaltungen.
Keine detaillierten Pinbelegungsdaten verfügbar für STA350BW.
Siehe die Datenblatt für die vollständige Pin-Konfiguration.
Typische Anwendungen
STA350BW ist geeignet für 6 Anwendungs: Compact Active Speakers, Powered Subwoofer, Home-Theater Sound Terminal, Multimedia Speaker Systems, Powered Monitor Speakers, Digital Audio Module.
Compact Active Speakers
The STA350BW fits compact active speakers that need local digital control and substantial output from one audio IC. Its four power outputs support flexible channel arrangements, while up to 8 programmable biquads per channel enable response shaping without a separate equalizer controller. The STMicroelectronics manufacturer datasheet documents a 1 x 75 W output condition into 4 Ω at 25 V. In implementation, the exposed pad must be connected to an effective thermal path, and the amplifier, filtering, and decoupling layout should follow the manufacturer recommendations.
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Powered Subwoofer
The STA350BW is suitable for a powered subwoofer where a 2.1-channel architecture and efficient power conversion are required. Its four outputs allow the design to distribute amplification among subwoofer and related channels, while programmable equalization can compensate for enclosure and driver response. The documented 75 W result applies to one 4 Ω channel with a 25 V supply under defined conditions, not automatically to every multi-channel configuration. Thermal design and real-load verification are therefore essential before matching the amplifier to a subwoofer’s rated power.
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Home-Theater Sound Terminal
The STA350BW can serve as the amplification core of a home-theater sound terminal when the product needs integrated DSP and several powered outputs in a restricted enclosure. Its digital processing, digital amplifier control, and FFX output stage reduce the number of separate functional blocks, while the 2.1-channel organization aligns naturally with cinema and multimedia audio. The manufacturer datasheet defines the main test conditions at 24 V, 1 kHz, 384 kHz switching frequency, and 8 Ω, providing a consistent basis for evaluating the amplifier stage.
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Multimedia Speaker Systems
The STA350BW is appropriate for multimedia speaker systems that combine digital input, programmable tonal control, and high-efficiency power amplification. Four outputs provide flexibility for stereo, additional channels, or a subwoofer path, while the equalization capability can help tailor channels to different driver sensitivities. At the same time, designers must observe the 26 V operating limit, stay below the 30 V absolute maximum, and verify filter and decoupling values against the complete manufacturer datasheet rather than relying only on headline output power.
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Powered Monitor Speakers
The STA350BW can support powered studio or near-field monitor designs that require repeatable digital equalization and efficient amplification in a confined enclosure. The available programmable biquads allow channel-specific correction, while the four-output arrangement offers architectural flexibility beyond a simple stereo pair. The manufacturer-documented 1 x 75 W condition shows the device’s high-power capability, but monitor designers should still verify frequency response, distortion, thermal margin, and output impedance using their actual speaker loads and enclosure constraints.
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Digital Audio Module
The STA350BW fits a modular digital-audio product that needs the signal-processing and amplification functions consolidated into a single IC. Its Sound Terminal architecture combines programmable equalization, digital amplifier control, and FFX power conversion, helping reduce board-level partitioning while retaining software-controlled audio behavior. The package still demands careful exposed-pad handling and a low-impedance supply network. Because the verified excerpts do not include the complete control interface, clock requirements, or pin map, module designers must verify those details in the official manufacturer documentation.
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Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für STA350BW – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt |
|---|---|
| Package | PowerSSO-36 EPD |
| Brand | STMicroelectronics |
| Product Type | 2.1-channel high-efficiency digital audio system |
| Power Outputs | 4 outputs |
| Documented Maximum Output | 1 x 75 W into 4 Ω at VCC = 25 V |
| Operating Supply Voltage | Up to 26 V |
| Absolute Maximum Supply Voltage | 30 V |
| Programmable Biquads | Up to 8 per channel |
Wichtigste Unterscheidungsmerkmale
- Integrated Sound Terminal architecture (vs. Discrete DSP and power-amplifier implementation)
- Programmable channel equalization (vs. Basic fixed-response amplifier design)
- Documented high-power operating condition (vs. Lower-power generic audio amplifier)
Designhinweise
Treat the exposed pad as the STA350BW’s principal thermal path. STMicroelectronics identifies the PowerSSO-36 EPD as having its exposed pad down, so the PCB land pattern must provide the manufacturer-specified solderable area and connect it to a suitable copper region. The verified excerpts do not provide junction-temperature limits, thermal resistance, or minimum copper dimensions; obtain those values from the complete manufacturer datasheet before estimating temperature rise or specifying an enclosure cooling strategy.
Design the supply path for both steady-state demand and amplifier switching transients, while keeping the operating voltage at or below the documented 26 V range. The 30 V absolute maximum is a stress limit, not a recommended operating point. The manufacturer’s principal test condition uses VCC = 24 V, and the 75 W output example uses a 25 V supply, so the power source, decoupling network, layout, and protection strategy must be evaluated against the intended channel count and load.
Follow the manufacturer’s reference layout for the input, output, filtering, control, power, and exposed-pad nets. Digital audio power stages can couple switching energy into sensitive signal paths, so keep high-current loops compact and route them away from clock, control, and analog input traces. The supplied excerpts do not reveal the complete pin table or recommended component values, so do not infer those details from generic Class-D layouts; verify them in the official STA350BW documentation.
Do not equate the 1 x 75 W headline condition with every supported output mode. That value is tied to one 4 Ω channel, VCC = 25 V, and the manufacturer’s stated test setup. Multi-channel operation, 8 Ω loads, thermal limits, protection behavior, and filter configuration can change usable output. Likewise, do not assume that the STA350B or STA3508W is a drop-in substitute because their exposed-pad orientation or package listing differs.
Compliance-Informationen
The supplied verified excerpts do not contain explicit RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations. These fields remain unknown rather than being inferred from the manufacturer or package.
