STA333MLJ13TR - 2-Channel 20W Class-D Audio | STMicroelectronics
Référence : STA333MLJ13TR ✓ ActifSTA333MLJ13TR Présentation
A Class-D audio power amplifier is a semiconductor that uses transistor switching to deliver energy to a loudspeaker with high efficiency and low output-stage dissipation. Within the broader product hierarchy, the STA333MLJ13TR is a fully integrated audio amplifier processor, which combines Class-D output-driver functionality with audio signal-processing and interface capabilities. This integration can simplify a stereo amplifier design while reducing the number of external power-stage components.
The two-channel architecture supports simultaneous left- and right-channel amplification, making the device suitable for stereo audio products. Its 4.5 V to 20 V supply range accommodates portable, consumer, multimedia, and automotive-style audio systems operating from suitable battery or regulated rails. The listed 20 W per-channel rating is a key selection criterion, but designers should confirm headroom, thermal limits, speaker impedance, and the manufacturer’s recommended output-filter topology for the intended enclosure and thermal environment.
The PowerSSO-36 package provides a compact surface-mount footprint and an exposed thermal pad for distributing heat into the PCB copper area. Thermal performance depends on the PCB land pattern, copper coverage, airflow, ambient temperature, output power, and load impedance. Input filtering, feedback or mode-control components, supply decoupling, output inductors, and output capacitors should be implemented exactly as directed by the manufacturer datasheet to preserve the intended amplification behavior and reliability.
Typical uses include compact stereo audio amplifiers, multimedia speakers, active speakers, home-audio systems, and powered speaker modules. The 36-pin PowerSSO arrangement is appropriate where a multi-channel Class-D solution must be mounted on a high-density PCB rather than through-hole hardware. Its integrated processing architecture can also reduce board area when compared with a discrete approach that requires separate output stages.
Before layout, confirm that the exposed pad is tied to the required ground and thermal plane, input and output connections are separated to minimize feedback into sensitive audio paths, and the supply network provides adequate transient current. The choice should be based on the required channel count, continuous and peak output power, supply voltage, speaker impedance, thermal environment, and acoustic target. This product page combines the confirmed electrical and packaging facts with pin-compatible sourcing guidance, practical thermal and layout guidance, and decision criteria for comparing replacement options.
Alternatives de remplacement direct pour STA333MLJ13TR — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec STA333MLJ13TR (même facteur de forme et même empreinte) — différant par Operating Temperature Range, Package, Product Type.
Aucune alternative de remplacement direct disponible pour ce produit.
Demander des alternativesSTA333MLJ13TR Valeurs maximales et caractéristiques électriques
| Product Type | Fully integrated Class-D audio amplifier processor |
| Number of Channels | 2 channels |
| Tension d'alimentation de fonctionnement | 4.5 V to 20 V |
| Rated Output Power | 20 W per channel |
| Configuration de sortie | 2-channel stereo |
| Boîtier | 36-pin PowerSSO with exposed pad |
| Type de montage | Surface mount |
| Plage de température de fonctionnement | 0°C to 70°C |
| Statut du cycle de vie | Active |
| Manufacturer | STMicroelectronics |
| Device Category | Audio Special Purpose integrated circuit |
| Packaging Format | Tape and reel |
| Amplifier Class | Class-D |
Guide de configuration des broches du STA333MLJ13TR 36-pin powersso with exposed pad
Configuration des broches du STA333MLJ13TR (boîtier 36-pin powersso with exposed pad). Ce composant analogique comporte des broches d'entrée, de sortie et d'alimentation. Consultez la fiche technique du fabricant pour les configurations des broches d'annulation d'offset, de compensation et d'activation. Idéal pour le conditionnement de signaux et les circuits amplificateurs.
Aucune donnée de brochage détaillée disponible pour STA333MLJ13TR.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
STA333MLJ13TR convient pour 6 applications: Compact Multimedia Speaker, Powered Stereo Speaker, Home Audio Amplifier Module, Portable Audio System, Digital Audio Active Speaker, Two-Channel Reference Speaker.
Compact Multimedia Speaker
The STA333MLJ13TR is suited to a compact stereo multimedia speaker because it combines two channels in one 36-pin PowerSSO device and is listed at 20 W per channel from a 4.5 V to 20 V supply. It can drive left and right speaker channels while reducing the number of separate output-amplifier packages. The design must provide the required input conditioning, Class-D output filtering, and supply decoupling. Thermal planning should include the exposed pad, PCB copper, and the heat generated by sustained output because the stated 0°C to 70°C ambient range does not remove the need for enclosure-level heat control.
Recommandé
Powered Stereo Speaker
A powered stereo speaker can use the STA333MLJ13TR as its final two-channel amplification stage when the target is a 20 W-per-channel Class-D design. The 4.5 V to 20 V operating range supports several portable and powered-speaker supply architectures. Designers should select speaker impedance and output-filter components according to the manufacturer guidance, and should reserve enough PCB copper around the exposed pad for heat removal. Mechanical stability and audible artifacts also depend on grounding, connector layout, and enclosure airflow, so amplifier selection is only one part of the acoustic system design.
Recommandé
Home Audio Amplifier Module
The STA333MLJ13TR is appropriate for a compact home-audio amplifier module requiring left and right amplification channels in one surface-mount device. Its listed 20 W per channel capability can serve compact passive speakers when the supply, load, cooling, and filtering conditions are compatible. A module implementation should maintain short, properly terminated speaker outputs and keep switching-node areas away from audio inputs. The 36-pin PowerSSO package is well suited to multilayer PCB assembly, but its exposed pad must connect to the specified thermal and electrical plane without compromising audio return paths.
Recommandé
Portable Audio System
A portable entertainment product can benefit from the STA333MLJ13TR when two Class-D channels are needed in a compact surface-mount assembly. Its stated 20 W per channel output and 4.5 V minimum operating voltage are useful for battery-derived systems operating through a suitable boost or buck-boost rail. Battery life depends on the complete power-conversion architecture because Class-D efficiency alone does not determine system consumption. Use the specified input and output networks, provide local high-frequency supply bypassing, and verify acoustic performance across the full battery-voltage range and speaker-load conditions.
Recommandé
Digital Audio Active Speaker
The STA333MLJ13TR fits an active-speaker architecture that accepts processed stereo audio and drives two physical speakers. Digital source conditioning can be handled upstream by an audio processor, while the STA333MLJ13TR provides the final Class-D output stage. This division of responsibility allows the amplifier processor to focus on efficient power delivery to the transducers. The completed design should verify signal polarity, channel separation, filter stability, speaker impedance, and thermal rise. Particular care is needed around ground and power return paths because high-current switching output currents can create ground-potential differences that disturb sensitive audio circuitry.
Recommandé
Two-Channel Reference Speaker
The STA333MLJ13TR may be used in a two-channel reference-speaker project when its listed output rating, supply range, and integrated processing match the design target. Compared with a discrete multi-stage approach, one dual-channel power package can simplify assembly and reduce the number of output-driver footprints. However, true drop-in substitution should not be inferred from similar amplifier functions. A candidate must match the PowerSSO-36 land pattern, pin functions, control protocol, external component values, and thermal requirements. Prototype the output filtering and verify channel balance and distortion before committing to production.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour STA333MLJ13TR — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Principaux différenciateurs
- Integrated dual-channel Class-D output architecture (vs TPA3116D2)
- Wide confirmed operating supply range (vs IRS2092)
- Single-package channel integration (vs LM4780)
Notes de conception
Treat the exposed pad as both a thermal path and a required package feature. Use the manufacturer land pattern, connect the pad to the specified ground plane, and provide uninterrupted copper beneath and around the PowerSSO-36 footprint. Validate junction and enclosure temperature at the maximum intended channel output, speaker load, and ambient temperature. The listed 20 W-per-channel capability is not a guarantee that every PCB can sustain both channels continuously without an appropriate thermal design.
Separate audio inputs, references, and low-level control traces from high-current outputs and switching nodes. Keep input and output-filter components close to their associated device pins, maintain a compact return path, and follow the manufacturer’s recommended output-filter topology. Incorrect LC filtering, poor component placement, or output-to-input coupling can cause instability, excessive ripple, channel imbalance, or audible interference even when the amplifier operates within its stated supply and power limits.
Design the supply path for the load rather than only for average Class-D efficiency. Place the required bypass capacitors close to the supply and ground pins, keep the high-current loop small, and verify startup, voltage droop, and transient response at both channels’ rated output. The confirmed operating range is 4.5 V to 20 V, but usable continuous output at a particular supply and speaker impedance may be lower than the headline 20 W-per-channel figure.
Informations de conformité
The verified product information identifies the device as active and surface mount but does not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status.
