TAS5731PHP - 20W Stereo Class-D Amplifier | Texas Instruments
料号： TAS5731PHP ✓ 量产中TAS5731PHP 概述
A Class-D audio amplifier is a switching power amplifier whose output stage rapidly switches between supply rails, producing a filtered full-bridge output for a speaker load. Within the electronics hierarchy, the TAS5731PHP belongs to the Class-D amplifier family, then to audio power amplifiers, then to amplifier ICs and power-management semiconductors. Its digital input architecture simplifies connection to digital audio processors and MPEG decoders while avoiding an analog input path.
Key features include 20 W stereo output capability, 41 W mono output capability, an 8 V to 21.5 V supply range, and 90% efficiency. The manufacturer search data also identifies a 3.3 V digital supply requirement and a 70 mΩ output-device on-resistance. These characteristics suit compact consumer audio equipment where a high-efficiency amplifier can reduce heat generation relative to a linear amplifier operating from the same supply.
The PHP package contains 48 pins and measures 7 mm by 7 mm. Its operating-temperature range is -40°C to 85°C. The Part-Pin-Value option refers to the open-loop digital amplifier configuration identified by Texas Instruments; detailed control, filtering, and mixer implementation therefore depend on the associated DSP and external circuit design rather than on a conventional analog gain-control network.
Typical applications include stereo speaker systems, compact sound bars, home-theater equipment, active subwoofers, and 2.1-channel multimedia products. The 2.1 support can reduce the need for a separate amplifier when driving left, right, and subwoofer channels. However, thermal performance and output power must be evaluated at the actual supply voltage, load impedance, channel configuration, and PCB thermal conditions.
For implementation, follow the manufacturer datasheet for the exposed-pad connection, input and output filtering, power-supply decoupling, and speaker-load layout. The 48-pin HTQFP footprint requires careful thermal-via placement beneath the exposed pad. Verify worst-case dissipation across supply tolerance and audio peaks because sustained near-limit output can raise junction and board temperatures even when the amplifier operates with high efficiency.
This product page consolidates the verified manufacturer specifications, current distributor purchasing information, same-family drop-in alternatives, and practical design guidance. It adds context for thermal, layout, replacement, and selection decisions while keeping unavailable electrical details explicitly marked rather than estimating them.
直接替换替代料： TAS5731PHP ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： TAS5731PHP （相同外形与封装尺寸） ——差异在于 Digital Audio Input, Package.
TAS5713PHPR
✅ 直接替换📋 参考替代料（不在目录中）
TAS5715PHPR
✅ 直接替换📋 参考替代料（不在目录中）
TAS5711PHP
✅ 直接替换 ⚠️ 规格未核验联系询价
查看数据手册 →TAS5701PHPR
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
TAS5703PHPR
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
TAS5731PHP 最大额定值与电气特性
| Device Type | Open-loop digital-input Class-D audio amplifier |
| 输出配置 | 1-channel mono or 2-channel stereo |
| Stereo Output Power | 20 W |
| Mono Output Power | 41 W |
| Analog Power Supply Range | 8 V to 21.5 V |
| Digital Power Supply | 3.3 V |
| Maximum Efficiency | 90% |
| Output-Device On-Resistance | 70 mΩ |
| Digital Audio Input | I²S input |
| Channel Support | 2.1-channel support |
| 封装 | 48-pin HTQFP (PHP), 7 mm x 7 mm |
| 工作温度范围 | -40°C to 85°C |
| 安装类型 | Surface mount |
| Lead-Free Status | Lead free |
| RoHS 状态 | RoHS compliant |
| Digital Signal Processing | DSP and 2.1 mode |
TAS5731PHP 48-pin htqfp (php), 7 mm x 7 mm 引脚配置指南
TAS5731PHP（48-pin htqfp (php), 7 mm x 7 mm 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： TAS5731PHP.
请参阅 数据手册 以查看完整引脚配置。
典型应用
TAS5731PHP 适用于 6 应用s: 2.1-Channel Soundbar, Compact Stereo Speaker System, Active Subwoofer, Home-Theater Audio System, Portable Multimedia Speaker, Digital Audio Processing Platform.
2.1-Channel Soundbar
TAS5731PHP fits a compact 2.1-channel soundbar because Texas Instruments explicitly identifies 2.1 support in the same device used for stereo amplification. The verified 20 W stereo rating covers left and right channels, while the 41 W mono rating can support a higher-power subwoofer channel when the load and thermal conditions permit. A 3.3 V digital supply and digital audio input simplify connection to a soundbar audio processor. The implementation should preserve the manufacturer-recommended power filtering and output-network layout, then verify sustained subwoofer output at the maximum 21.5 V analog supply. Thermal analysis must include amplifier loss, copper spreading, and the enclosure's heat dissipation rather than relying only on the advertised 90% efficiency.
推荐
Compact Stereo Speaker System
TAS5731PHP is suitable for compact stereo speaker systems requiring 20 W per channel from an 8 V to 21.5 V analog supply. Its digital input avoids requiring a separate analog-to-digital conversion stage when the source is an I²S-compatible processor, while its open-loop architecture places signal processing responsibility on the associated digital audio system. The 90% maximum efficiency helps limit amplifier-generated heat compared with an inefficient linear output stage. Designers should select speakers and output filtering for the verified operating class, verify distortion at the intended frequency and power, and provide adequate copper around the 48-pin HTQFP exposed pad. The board should also include local analog and digital decoupling to prevent supply ripple from degrading audible output.
推荐
Active Subwoofer
TAS5731PHP can serve as the power stage in an active subwoofer because its verified configuration supports mono operation up to 41 W. A digital audio processor can deliver the low-frequency I²S stream, leaving the amplifier to supply the power required by the speaker load while the DSP handles filtering, volume, and bass management. The 8 V to 21.5 V analog range permits supply selection appropriate to the target output, but the usable power still depends on load impedance and thermal limits. Because subwoofer passages can sustain high power, engineers should test worst-case continuous output and startup behavior. The exposed-pad via pattern, output inductors or filters, speaker return path, and supply-current capacity are especially important for reliable operation.
推荐
Home-Theater Audio System
TAS5731PHP supports home-theater front channels with its verified 20 W stereo capability and can provide a separate 41 W mono path for a subwoofer. Digital audio input allows a surround processor or codec to retain digital control over channel routing, volume, and equalization. This is particularly useful when the system already uses an I²S audio pipeline and designers want to avoid returning the signal to analog before amplification. The amplifier must be evaluated for peak as well as continuous output, and its filtering network must be designed for the selected speaker impedance. Layout quality is critical because Class-D switching currents create high-frequency edges; keep input, control, and output-ground paths separated, minimize switching loops, and use the manufacturer's recommended thermal and decoupling structures.
推荐
Portable Multimedia Speaker
TAS5731PHP is suitable for portable multimedia products that use a battery-derived analog rail and need efficient digital amplification for an integrated speaker. Its maximum efficiency of 90% is valuable in a compact enclosure where amplifier heat must be removed without a large heatsink. The 8 V minimum analog supply may require a boost converter when the available battery rail is lower, while the 3.3 V digital rail can be shared with the audio processor. System-level power conversion can introduce noise that reaches the amplifier input, so filtering and layout must be evaluated together rather than independently. Designers should also account for battery-voltage variation, speaker efficiency, thermal rise during maximum-volume playback, and protection requirements when the enclosure is small or the listener can be close to the speaker.
推荐
Digital Audio Processing Platform
TAS5731PHP suits a programmable audio platform whose DSP performs channel routing, filtering, loudness control, and 2.1 mixing before the signal reaches the Class-D output stage. The device's digital input and DSP support align with processors, MPEG decoders, and audio codecs, allowing the amplifier to remain a dedicated output stage rather than a separate analog-control device. The 20 W stereo and 41 W mono capabilities provide two useful power configurations from one verified family member. Integration still requires careful partitioning of clocks, data, control, and power rails to prevent digital switching from coupling into sensitive audio paths. Follow the datasheet for I²S format, supported clocking, filters, decoupling, and exposed-pad construction, and validate synchronization across every source before production release.
推荐
推荐产品汇总
工程参考数据： TAS5731PHP ——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 | TAS5713PHPR | TAS5715PHPR | TAS5711PHP | TAS5701PHPR | TAS5703PHPR |
|---|---|---|---|---|---|---|
| Package | 48-pin HTQFP (PHP), 7 mm x 7 mm | 48-pin HTQFP (PHP) | 48-pin HTQFP (PHP) | 48-pin HTQFP (PHP) | 48-pin HTQFP (PHP) | 48-pin HTQFP (PHP) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
关键差异点
- Verified single-device 2.1-channel support （对比 TAS5713PHPR)
- Verified 41 W mono output capability （对比 TAS5715PHPR)
- Verified 20 W stereo output with digital input （对比 TAS5711PHP)
- Up to 90% amplifier efficiency （对比 TAS5701PHPR)
设计说明
Estimate heat dissipation at every operating mode before selecting the PCB area. Estimated: at 21.5 V input and 41 W mono output, using the advertised 90% maximum efficiency, the idealized input power is 45.6 W and amplifier loss is 4.6 W. Actual loss can be higher because efficiency varies with output level and load. Confirm junction temperature with the manufacturer's thermal model and provide copper and thermal vias for the exposed pad.
Place analog, digital, and power-supply decoupling directly beside their associated pins. Keep high-current Class-D switching loops compact and avoid routing output-current paths beneath sensitive audio inputs. The 48-pin HTQFP requires an exposed-pad land pattern and thermal-via arrangement; use the manufacturer datasheet layout rather than constructing a generic 48-pin footprint. Confirm pad dimensions, pin numbering, solder mask, and paste volume against the PHP package drawing.
Treat the digital audio interface and analog output filter as separate high-speed and precision-routing domains. Route I²S clock and data away from the speaker outputs and switching inductors, use a continuous ground reference, and keep the digital return path from crossing output-current loops. Validate clock jitter, data setup and hold margins, and filter stability with the actual codec, DSP, PCB, speaker load, and output-network components.
Do not infer that a same-family TAS57xx device is automatically interchangeable. Before substitution, compare the PHP pin map, exposed-pad connection, analog and digital supply pins, I²S channels, clock requirements, control interface, output stage, speaker-load limits, and 2.1-channel DSP behavior. TAS5731PHP explicitly provides 2.1 support and a 41 W mono rating, so a substitute lacking either verified feature may require PCB or firmware changes.
合规信息
RoHS-compliant and lead-free status is verified by the supplied component listing. REACH, halogen-free, and conflict-minerals information was not provided. The device is an audio amplifier IC rather than an automotive-qualified AEC-Q100 device.
