STA339BWTR - 2.1-Channel Digital Audio System | STMicroelectronics
料号： STA339BWTR ✓ 量产中STA339BWTR 概述
A digital audio system is an integrated audio signal-chain IC that processes digital audio, controls amplification, and delivers power through an efficient output stage. Within the broader hierarchy, the STA339BWTR belongs to the digital amplifier class, which combines a digital signal processor, power-control logic, and speaker-drive circuitry in one package. Its FFX architecture is designed to provide high-quality, high-efficiency, all-digital amplification for compact audio products.
Key features include a wide 26 V operating supply range, a 30 V absolute maximum rating, integrated digital audio processing, digital amplifier control, and an FFX power output stage. The FFX implementation supports ternary PWM output configurations for stereo or 2.1-channel operation. The manufacturer describes the STA339BW as a high-power single-chip solution intended to reduce the number of discrete components required in powered speaker systems.
The device accepts digital audio information and uses its integrated processing and control functions to manage the amplifier channels. According to the manufacturer datasheet, specifications are evaluated under defined conditions including VCC = 18 V, 1 kHz signal frequency, 384 kHz switching frequency, 25°C ambient temperature, and an 8 ohm load unless otherwise specified. These conditions provide the reference point for interpreting the electrical and performance data.
Typical applications include active speaker systems, compact consumer-audio products, sound bars, smart speakers, multimedia equipment, and other 2.1-channel installations where an integrated digital amplifier simplifies the signal path. The exposed-pad package also requires careful PCB layout for heat transfer from the power stage to the board copper.
Designers should follow the manufacturer datasheet for decoupling, output filtering, thermal management, exposed-pad soldering, and loudspeaker-load requirements. In particular, the power-output configuration must be selected for the intended channel count and speaker impedance, and the PCB must provide adequate thermal copper around the exposed pad. Verify maximum supply voltage, current, and thermal limits against the selected operating mode.
This page consolidates the verified manufacturer and distributor information, practical package and thermal guidance, pricing references, and a structured comparison of the available drop-in candidates. It is intended to help engineers confirm footprint, supply, power-output, and sourcing requirements before committing to a board design.
直接替换替代料： STA339BWTR ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
STA339BWS13TR
✅ 直接替换📋 参考替代料（不在目录中）
STA350BWTR
✅ 直接替换联系询价
查看数据手册 →STA339BWTR 最大额定值与电气特性
| Product Type | 2.1-channel high-efficiency digital audio system |
| Device Architecture | Integrated digital audio processing, digital amplifier control, and FFX power output stage |
| 输出配置 | 2 channels of ternary PWM in stereo mode; 3-channel 2.1-channel configuration |
| Stereo Output Power | 20 W per channel into 8 ohm |
| Operating Supply Range | 5 V to 26 V |
| Absolute Maximum Supply Voltage | 30 V |
| Nominal Test Supply Voltage | 18 V |
| Test Signal Frequency | 1 kHz |
| 开关频率 | 384 kHz |
| Test Ambient Temperature | 25°C |
| Test Load Impedance | 8 ohm |
| External Clock Requirement | Multiple of the input sample frequency |
| 封装 | 36-FSOP with exposed pad, 7.50 mm width |
| 安装类型 | Surface mount |
| Supplier Packaging | Tape and reel |
| Application Category | Digital audio |
STA339BWTR 36-fsop with exposed pad, 7.50 mm width 引脚配置指南
STA339BWTR（36-fsop with exposed pad, 7.50 mm width 封装）的引脚配置。 该模拟元件具有输入、输出和电源引脚。请参阅制造商数据手册以了解失调调零、补偿和使能引脚配置。适用于信号调理和放大器电路。
暂无详细引脚数据： STA339BWTR.
请参阅 数据手册 以查看完整引脚配置。
典型应用
STA339BWTR 适用于 6 应用s: Active Speaker Systems, 2.1-Channel Sound Bars, Smart Speakers, Multimedia Speaker Systems, USB and Network Audio Products, Automotive Audio Systems.
Active Speaker Systems
The STA339BWTR fits active speakers that require a compact digital signal path and integrated speaker drive. Its digital audio processing, amplifier control, and FFX output stage are combined in one 36-FSOP exposed-pad device, reducing the number of separate processing and amplification blocks. In stereo mode, the verified output rating is 20 W per channel into an 8 ohm load under VCC = 18 V and the manufacturer’s stated 1 kHz, 384 kHz switching-frequency, and 25°C test conditions. A finished active-speaker design must still configure the FFX channel mode correctly, preserve the required digital interface, and provide sufficient exposed-pad copper for heat dissipation.
推荐
2.1-Channel Sound Bars
The STA339BWTR supports 2.1-channel sound-bar architectures by combining stereo operation with a third channel and integrating the FFX power output stage. This is useful where a compact enclosure must host left, right, and subwoofer amplification without relying on several separate power-amplifier packages. The verified 5 V to 26 V operating range provides coverage for automotive, portable, and household voltage options after appropriate regulation. Designers should verify the exact output-power limits for the selected three-channel arrangement, support the 8 ohm test load where applicable, and provide the exposed pad with a thermal path into the PCB copper.
推荐
Smart Speakers
The STA339BWTR can serve as the output-power and digital-audio-control element in a smart speaker because it integrates processing, digital amplifier control, and an FFX power stage rather than requiring a separate output-stage design. Its verified 20 W per channel stereo capability into 8 ohm makes it relevant to compact powered enclosures with moderate speaker loading. The product must still receive compliant digital audio data and handle clocking correctly: the manufacturer states that the external clock supplied to the XTI pin must be a multiple of the input sample frequency. Board-level EMI, thermal copper, and speaker protection remain important design responsibilities.
推荐
Multimedia Speaker Systems
The STA339BWTR is appropriate for multimedia speaker systems that require efficient digital amplification in a constrained enclosure. Integrating digital audio processing with the FFX power stage shortens the analog output path, while the verified 5 V to 26 V operating range supports multiple external supply arrangements. The manufacturer’s reference performance is established at 18 V, 1 kHz, 384 kHz switching frequency, 25°C, and 8 ohm, so those conditions provide a useful baseline during system evaluation. Designers should account for real speaker impedance variation, amplifier protection, EMI filtering, and the exposed-pad thermal path when moving from a typical test load to a production loudspeaker.
推荐
USB and Network Audio Products
The STA339BWTR can be used in USB-audio or network-audio products when the upstream receiver delivers the compatible digital format and clock relationship required by the device. Its integrated digital processing and amplifier control simplify the downstream speaker-drive section, while the 5 V to 26 V operating range allows the amplifier to operate from an appropriately regulated rail. The manufacturer specifically states that the external XTI clock must be a multiple of the input sample frequency, with the exact relationship controlled by MCSx and IR register bits. A complete product must therefore validate interface format, sample-rate conversion strategy, ground layout, and output filtering.
推荐
Automotive Audio Systems
The STA339BWTR’s 5 V to 26 V operating supply range makes it relevant to automotive audio systems, provided the complete design satisfies the manufacturer’s automotive qualification and load-dump requirements. The verified operating range is distinct from the 30 V absolute maximum rating, and neither value removes the need for transient protection and a robust supply network. The integrated FFX stage offers 20 W per channel into 8 ohm under the specified stereo test conditions, which can support compact vehicle loudspeakers. Automotive qualification status, temperature limits, ISO 7637-2 transients, EMC performance, and load-dump testing are not established in the supplied data and must be reviewed separately.
推荐
推荐产品汇总
工程参考数据： STA339BWTR ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | STA339BWS13TR | STA350BWTR |
|---|---|---|---|
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Package | 36-FSOP with exposed pad, 7.50 mm width | 36-FSOP with exposed pad | 36-FSOP with exposed pad |
| Product Type | 2.1-channel high-efficiency digital audio system | STA339BW-family digital audio device | Digital audio device |
关键差异点
- Integrated 2.1-channel digital audio architecture （对比 STA350BWTR)
- Defined stereo output capability （对比 STA339BWS13TR)
- Broad verified operating supply range （对比 STA339BWS13TR)
设计说明
Treat the 36-FSOP exposed pad as the primary thermal path for the integrated FFX output stage. Place the device over a continuous PCB copper region, use multiple thermal vias where the manufacturer land pattern permits, and avoid placing heat-generating components immediately beneath the pad. Validate the final enclosure with the selected speaker load because the verified 20 W per-channel figure applies to the stated 18 V, 1 kHz, 384 kHz switching-frequency, 25°C, and 8 ohm conditions.
Design the supply for the 5 V to 26 V operating range and do not treat the 30 V absolute maximum rating as a normal operating target. Apply the manufacturer’s recommended input and output filtering and provide local high-frequency bypass close to the supply pins. The verified reference condition uses VCC = 18 V, so test the amplifier across the minimum, nominal, and maximum rail conditions used by the finished product rather than validating only at 18 V.
Route the digital audio and clock signals over short, continuous paths with a solid return reference and keep switching-power return currents out of the audio input area. The manufacturer states that the external clock at XTI must be a multiple of the input sample frequency, with the relationship determined by the MCSx and IR register settings. Verify timing at every supported sample rate and confirm that the clock source remains stable during startup, mute transitions, and channel reconfiguration.
Do not substitute a related suffix solely because its family name is similar. STA339BWS13TR and STA350BWTR are named in the comparison results, but the supplied excerpts do not establish matching pinout, digital-interface behavior, channel configuration, output power, or thermal limits. Before replacing the STA339BWTR, compare the official package drawing, exposed-pad connections, electrical characteristics, FFX configuration, and required control or register behavior.
合规信息
The supplied verified web data does not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. These fields remain unknown rather than being inferred from the manufacturer or package.
