STA333ML13TR - 2-Channel 20W DDX Audio Amplifier | STMicroelectronics
MPN： STA333ML13TR ✓ 啟用中STA333ML13TR 概覽
A Sound Terminal is a highly integrated audio subsystem that combines input decoding, digital signal processing, volume control, and power-amplifier drive functions on one die. This integration places it between a digital audio interface, a power management system, and a loudspeaker or line-driver stage. Unlike a conventional analog audio amplifier, the STA333ML13TR can operate without an external microcontroller while preserving digital control over the signal path.
Its principal features include two 24-bit DDX channels, 100 dB signal-to-noise ratio and dynamic range, selectable input sample rates from 32 kHz to 48 kHz, and automatic zero-detect mute. The DDX architecture provides high-efficiency digital power amplification while supporting two output configurations. Automatic mute reduces audible output during digital zero conditions, while the exposed pad improves heat transfer from the power-amplifier section.
The STA333ML13TR integrates decoding, filtering, volume control, and amplification within one device, reducing the component count required for a digital speaker system. Its I2S-oriented architecture is suited to source devices that can provide 24-bit digital audio, including portable media equipment, audio docking systems, consumer electronics, and compact powered speakers. The 18 V operating condition cited for 2 x 20 W output into 8 ohms establishes the supply level required for the highest stated output configuration.
Power-SSO-36 construction requires attention to both electrical and thermal design. The exposed thermal pad must be connected to the ground plane according to the manufacturer's package guidance, and adequate copper area must be provided to remove heat from the amplification stage. Input, output, supply, and decoupling connections should be routed to minimize switching noise and avoid unintended interaction between the two amplified channels.
This page combines the manufacturer product information, distributor listings, package details, and application-specific engineering guidance. It highlights the distinction between the integrated STA333ML family and conventional discrete amplifier chains, helping engineers assess power-supply capability, interface compatibility, thermal implementation, and functional replacement options before committing a PCB layout.
The most important design trade-off is integration versus flexibility. The STA333ML13TR reduces external circuitry and supports autonomous digital audio operation, but its fixed integrated architecture may be less suitable than a discrete amplifier chain when designers require independent analog gain stages, unusual output filtering, or custom thermal and power configurations. Verify the complete pin description, recommended PCB layout, output-filter requirements, and electrical limits in the manufacturer datasheet before layout release.
直接替換替代品，適用於 STA333ML13TR — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： STA333ML13TR （相同外形與佔位） — 差異在於 Operating Temperature Range, Package, Product Type.
STA333ML
✅ 直接替換📋 參考替代品（不在目錄中）
STA333ML14TR
✅ 直接替換📋 參考替代品（不在目錄中）
STA333MLJ13TR
✅ 直接替換聯絡詢價
查看資料表 →STA333ML13TR 最大額定值與電氣特性
| Product Type | Two-channel microless high-efficiency digital audio system |
| Number of Audio Channels | 2 channels |
| Supply Voltage Range | 4.5 V to 20 V |
| Maximum Output Configuration | 2 x 20 W into 8 ohms at 18 V |
| Power per Channel | 20 W at 18 V into 8 ohms |
| Power Amplifier Architecture | High-efficiency digital power amplification with DDX |
| Internal Signal Processing | 2 channels of 24-bit DDX |
| Signal-to-Noise Ratio | 100 dB |
| Dynamic Range | 100 dB |
| Input Sample Rate Range | 32 kHz to 48 kHz |
| Digital Audio Interface | I2S |
| Mute Function | Automatic zero-detect mute |
| External Microcontroller Requirement | Capable of operating without an external microcontroller |
| Device Function | Fully integrated processor |
| 封裝 | PowerSSO-36 with exposed pad |
| 安裝類型 | Surface mount |
| 工作溫度範圍 | 0 C to 70 C ambient temperature |
| Amplifier Category | Audio Special Purpose |
STA333ML13TR powersso-36 with exposed pad 腳位配置指南
STA333ML13TR（powersso-36 with exposed pad 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： STA333ML13TR.
請參閱 資料表 以查看完整腳位配置。
典型應用
STA333ML13TR 適用於 6 應用s: Compact Powered Bluetooth Speaker, Digital Audio Docking Station, Home Theater Speaker Pair, Multimedia Speaker Amplifier, Portable Media Player, Digital Public-Audio Speaker Module.
Compact Powered Bluetooth Speaker
The STA333ML13TR fits a compact powered speaker that receives digital audio from a Bluetooth or network-audio source. Its integrated two-channel amplification eliminates a separate pair of power amplifiers, while the I2S interface avoids an analog conversion stage when the source already provides digital samples. The stated 2 x 20 W capability into 8-ohm speakers at 18 V supports two-way or compact stereo systems, although the final acoustic output depends on the power supply and enclosure. The Sound Terminal can operate without an external microcontroller, reducing control overhead. Thermal design around the exposed pad remains essential, particularly in sealed enclosures where heat cannot leave through convection.
推薦
Digital Audio Docking Station
A docking station can use the STA333ML13TR to convert an I2S source into two amplified speaker outputs without a discrete audio-processing chain. The device supports 32 kHz to 48 kHz input sample rates and provides two channels of 24-bit DDX processing, matching common digital playback sources. With a 4.5 V to 20 V supply range, the same architecture can serve portable or powered desktop docks. The 2 x 20 W rating at 18 V provides useful headroom for 8-ohm speakers, but the adapter, charging system, and shared power budget must be coordinated. Use the exposed-pad copper area for efficient heat removal.
推薦
Home Theater Speaker Pair
The STA333ML13TR can drive the left and right channels of a compact home-theater speaker pair from a digital audio processor. Two-channel 24-bit DDX processing, 100 dB dynamic range, and selectable 32 kHz to 48 kHz sample rates suit encoded-video and music playback pipelines that already operate digitally. The 2 x 20 W output configuration at 18 V is appropriate for near-field speakers with 8-ohm nominal loads. Low-latency digital processing may reduce the need for separate channel equalizers, but the design must still include manufacturer-recommended output filtering and thermal management. Verify channel mapping and mute behavior in the final system software.
推薦
Multimedia Speaker Amplifier
A multimedia speaker platform can combine digital source control, stereo playback, and amplification around the STA333ML13TR. Its microless operation is useful when the host processor is primarily handling connectivity rather than audio decoding. The device accepts I2S audio and supports the common 32 kHz through 48 kHz sample-rate range, reducing format-conversion complexity. At 18 V, two 8-ohm channels can receive up to 20 W each under the manufacturer-rated condition. Actual continuous use should be checked against amplifier thermal limits, speaker sensitivity, and the enclosure. The exposed thermal pad and compact PowerSSO-36 footprint make careful plane construction and via placement essential.
推薦
Portable Media Player
In a portable media player, the STA333ML13TR replaces separate digital processing and dual power-amplifier stages when the design targets compact speakers and can supply enough voltage and current. The 4.5 V minimum operating voltage is compatible with systems that already regulate a rail above that level. Its 100 dB signal-to-noise ratio and dynamic range support clean headphone-adjacent or small-speaker playback, while automatic zero-detect mute suppresses output during digital silence. Battery designs must calculate average and peak amplifier dissipation because efficiency varies with output level and load. Confirm whether the selected system requires external filter components, charge pumping, or a separate low-voltage logic rail.
推薦
Digital Public-Audio Speaker Module
A networked public-audio module can use the STA333ML13TR when its upstream processor supplies an I2S stream and the enclosure can support a 2 x 20 W stereo output condition. The Sound Terminal consolidates digital processing and amplification, which simplifies fixed-installation speaker electronics. Its 100 dB dynamic range and selectable sample rates support music and speech distribution, while automatic zero-detect mute avoids residual output from silent digital frames. The system designer must still address acoustic safety, maximum volume, feedback, thermal rise, and output-filter selection. Use a protected power supply and provide generous exposed-pad copper because sustained high-level playback can heat the PowerSSO-36 package.
推薦
推薦產品摘要
工程參考資料，適用於 STA333ML13TR — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | STA333ML | STA333ML14TR | STA333MLJ13TR |
|---|---|---|---|---|
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Package | PowerSSO-36 exposed pad | PowerSSO-36 exposed pad | PowerSSO-36 exposed pad | PowerSSO-36 exposed pad |
| Audio Channels | 2 channels | 2 channels | 2 channels | 2 channels |
| Maximum Rated Output | 2 x 20 W into 8 ohms at 18 V | 2 x 20 W into 8 ohms at 18 V | 2 x 20 W into 8 ohms at 18 V | 2 x 20 W into 8 ohms at 18 V |
| Supply Voltage Range | 4.5 V to 20 V | 4.5 V to 20 V | 4.5 V to 20 V | 4.5 V to 20 V |
| Internal Processing | 2 channels of 24-bit DDX | 2 channels of 24-bit DDX | 2 channels of 24-bit DDX | 2 channels of 24-bit DDX |
| Signal-to-Noise Ratio | 100 dB | 100 dB | 100 dB | 100 dB |
| Input Sample Rates | 32 kHz to 48 kHz | 32 kHz to 48 kHz | 32 kHz to 48 kHz | 32 kHz to 48 kHz |
| Mute Function | Automatic zero-detect mute | Automatic zero-detect mute | Automatic zero-detect mute | Automatic zero-detect mute |
主要差異化特點
- Combines digital processing and stereo power amplification on one die (對比STA333ML)
- Supports two-channel digital amplification without an external microcontroller (對比STA333ML14TR)
- Delivers a 2 x 20 W stereo configuration at 18 V (對比STA333MLJ13TR)
設計說明
Treat the exposed pad as part of the thermal and electrical design. Place the device over a continuous ground-plane area, add thermal vias using the manufacturer pattern, and avoid interrupting the plane with unrelated high-current routes. The rated 2 x 20 W condition can generate substantial heat, particularly in a sealed speaker enclosure. Validate junction-temperature margin at maximum continuous output, worst-case ambient temperature, and minimum supply voltage rather than relying on the headline output rating alone.
Keep the two output paths symmetrical and route each amplifier channel with a short, low-loop-area path to its output-filter network and speaker connector. Follow the manufacturer reference layout for the I2S clock, data, and control signals to limit timing distortion. Place local supply and ground connections at the package pins, keep the exposed-pad region continuous, and separate high-current amplifier returns from sensitive digital audio references where the layout permits.
Do not treat the STA333ML, STA333ML13TR, STA333ML14TR, and STA333MLJ13TR labels as automatically interchangeable solely because they share the family name. Compare the ordering table, temperature rating, configuration, pin description, and exposed-pad requirements for the exact suffix. Also verify the external output-filter component values and supply-current capability; correct digital data cannot compensate for an undersized power rail or incorrect filter network.
Size the supply for amplifier current, not only average headphone-like load current. At the stated 18 V operating condition, the device is rated for 2 x 20 W into 8 ohms, and the power supply must also handle startup, filter-capacitor charging, and transient demand. Use local high-frequency bypassing and verify supply ripple, current limit, startup sequencing, and thermal performance in the assembled design. A 20 V maximum operating supply leaves little margin for overshoot.
合規資訊
The current product information does not explicitly state material-compliance status. AEC-Q100 qualification is not indicated for this general-purpose audio-amplifier product.
