TAS5708PHP - 20W Stereo Class-D Audio Amplifier | Texas Instruments
料号： TAS5708PHP ✓ 量产中TAS5708PHP 概述
A digital Class-D audio power amplifier is a power-management IC that accepts digital audio samples and uses internal switching and feedback circuitry to deliver power to loudspeakers. The Class-D topology belongs to the switching-amplifier hierarchy rather than conventional linear amplifiers, improving efficiency while the integrated digital signal path controls volume, equalization, and speaker dynamics.
The TAS5708 provides a 32-bit datapath, on-chip dynamic range control, and speaker equalization. Its digital input avoids the prescaling requirements associated with some older audio amplifiers and preserves signal integrity while processing audio. Closed-loop feedback is specifically identified for this device, providing a defined relationship between the amplifier output and the commanded speaker drive.
The integrated processing functions reduce the need for separate software or analog signal-conditioning blocks in consumer audio equipment. Dynamic range control can maintain perceived loudness while reducing distortion or clipping, while speaker equalization can compensate for acoustic and enclosure response differences. Exact filter coefficients, configuration registers, protection thresholds, and thermal limits must be confirmed in the manufacturer datasheet before implementation.
Typical uses include compact stereo speakers, multimedia speaker systems, Bluetooth speaker enclosures, soundbars, consumer television audio, and other powered speaker products. The 10 V to 26 V supply range suits systems using an external Class-D-compatible supply while keeping the amplifier integrated with digital audio processing.
A key design consideration is that the exposed thermal pad and output-filter layout must follow the manufacturer's reference design. Power loss depends on supply voltage, output power, modulation method, and filter efficiency, so thermal analysis should use the worst-case audio waveform rather than only a continuous sine-wave condition.
This product record combines manufacturer and distributor information with verified same-family alternatives, package-aware comparisons, and practical implementation guidance. It distinguishes confirmed specifications from values that require engineers to consult the full datasheet or design-support resources.
直接替换替代料： TAS5708PHP ——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： TAS5708PHP （相同外形与封装尺寸） ——差异在于 Package, Product Type, Rated Output Power, Digital Audio Input, Output Configuration.
TAS5710PHP
✅ 直接替换联系询价
查看数据手册 →TAS5711PHP
✅ 直接替换 ⚠️ 规格未核验联系询价
查看数据手册 →TAS5708PHP 最大额定值与电气特性
| Product Type | Stereo digital Class-D audio power amplifier |
| Channel Count | 2 channels |
| Rated Output Power | 20 W per channel |
| Distributor Output Power Rating | 20.2 W per channel |
| Supply Voltage Range | 10 V to 26 V |
| Digital Audio Input | I2S |
| Internal Audio Datapath | 32 bit |
| Amplifier Topology | Class-D with closed-loop feedback |
| 输出配置 | Stereo bridge-tied speakers |
| On-Chip Dynamic Range Control | Yes |
| On-Chip Speaker Equalization | Yes |
| 封装 | 48-pin HTQFP (PHP), 7 mm x 7 mm |
| 安装类型 | Surface mount |
| RoHS 状态 | unknown |
| REACH Status | unknown |
| AEC-Q100 Qualification | unknown |
TAS5708PHP 48-pin htqfp (php), 7 mm x 7 mm 引脚配置指南
TAS5708PHP（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： TAS5708PHP.
请参阅 数据手册 以查看完整引脚配置。
典型应用
TAS5708PHP 适用于 6 应用s: Powered Bluetooth Speaker, Compact Stereo Speaker System, Soundbar Speaker Drive, Consumer Television Audio, Multimedia Speaker, Industrial Audio Control Unit.
Powered Bluetooth Speaker
The TAS5708PHP fits powered Bluetooth speakers that convert a decoded digital audio stream into a 20 W stereo Class-D output. Its I2S input provides a direct digital interface to a suitable Bluetooth audio codec or system processor, while the internal 32-bit datapath supports processing before the speakers are driven. On-chip speaker equalization and dynamic range control can assist with tonal consistency and perceived loudness across a broader listening range. In a typical implementation, the codec feeds I2S data while the amplifier operates from a compliant 10 V to 26 V rail. The key engineering trade-off is that integrated processing simplifies the signal chain but does not eliminate the need for correct I2S configuration, protection review, thermal planning, and speaker-load validation.
Compact Stereo Speaker System
The TAS5708PHP is appropriate for compact two-way stereo speakers requiring approximately 20 W per channel from a dedicated 48-pin HTQFP amplifier. Two Class-D output channels reduce the number of separate power-amplifier packages while preserving digital control over volume, equalization, and dynamics. The device can sit near the speaker connector in the signal path after a digital source, allowing the I2S bus to carry audio into the output section. Compared with a traditional analog-output amplifier, this architecture avoids transmitting low-level analog signals across the board. The design must nevertheless follow the manufacturer requirements for the exposed thermal pad, decoupling, PCB layout, and speaker output network, because package size alone does not determine achievable acoustic power.
Soundbar Speaker Drive
The TAS5708PHP can support compact soundbar speaker sections where stereo digital audio must be converted efficiently into bridge-tied speaker drive. Its documented 20 W stereo rating, I2S interface, and integrated EQ and dynamic range control suit a processor-led audio architecture. Placing the amplifier at the output stage can centralize channel volume and speaker-response adjustments in the digital domain. For a soundbar, engineers must account for left, right, and potentially additional surround channels, so one TAS5708PHP may cover only a stereo pair or a dedicated channel subset. Speaker impedance, peak program power, filter losses, and enclosure thermal conditions must be checked before assuming continuous output across every driver.
Consumer Television Audio
The TAS5708PHP is suitable for television or display products that need an efficient local stereo amplifier for speakers supplied by an I2S-capable audio processor. Its digital input can reduce analog-routing requirements, while the 10 V to 26 V operating range is compatible with suitably designed external boost or multi-rail supplies. Integrated dynamic range control can help manage program content, and speaker EQ can support calibration of the television enclosure. The main implementation constraint is synchronization with the television's main audio processor, including I2S format, sample rate, channel mapping, latency, and startup behavior. Thermal and EMI verification should also consider the switching amplifier and the relatively confined internal space of a television cabinet.
Multimedia Speaker
The TAS5708PHP suits desktop and multimedia speakers that require a compact digital input path and approximately 20 W per stereo channel. A USB or wireless codec can provide I2S audio to the amplifier, avoiding a separate analog mixing and power-amplification chain. The integrated speaker EQ and dynamic range control are useful when the enclosure has limited low-frequency response or program material varies considerably in level. A practical design should verify whether the selected codec can route two channels to the amplifier and whether its digital volume control is bypassed appropriately. Speaker impedance and crossover choice remain independent of the amplifier's stated wattage and must be matched to its load and protection requirements.
Industrial Audio Control Unit
The TAS5708PHP can serve as the stereo output stage in an industrial audio or public-address control unit when the system already uses a digital audio bus. Its I2S input and 10 V to 26 V supply range support a controller-led architecture, while closed-loop feedback, EQ, and dynamic range control can improve consistency across a fixed installation. Compared with a generic consumer solution, an industrial implementation should pay particular attention to diagnostic coverage, thermal reliability, and acoustic load. The design should confirm protection behavior, mute-state control, startup sequencing, and fault handling in the complete data sheet. Because the verified excerpts do not specify industrial certifications, the TAS5708PHP should not be assumed AEC-Q100 qualified or otherwise agency approved.
工程参考数据： TAS5708PHP ——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 | TAS5710PHP | TAS5711PHP |
|---|---|---|---|
| Package | 48-pin HTQFP (PHP), 7 mm x 7 mm | 48-pin HTQFP (PHP) | 48-pin HTQFP (PHP) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Amplifier Type | Stereo Class-D audio power amplifier | Stereo Class-D audio power amplifier | Stereo Class-D audio power amplifier |
关键差异点
- Documented integrated digital audio processing （对比 TAS5710PHP)
- Complete manufacturer-supported function set （对比 TAS5711PHP)
- Verified 20.2 W distributor power rating （对比 TAS5710PHP)
设计说明
Use the exposed pad as the primary heat-spreading path and follow the Texas Instruments PCB and thermal guidance. Estimated: amplifier power dissipation depends on the selected supply, output level, speaker impedance, modulation scheme, and output-filter efficiency, none of which can be calculated from the verified excerpts alone. The evaluation should therefore use the worst-case audio waveform, preserve the specified copper and thermal-via arrangement, and verify the exposed-pad connection against the official pin table.
Place input, output, supply, and ground connections according to the manufacturer reference layout. The 10 V to 26 V Class-D supply path can carry high-frequency switching current, so keep the loop between the device, decoupling network, and ground plane compact. Verify the required bulk and high-frequency capacitors against the datasheet. Do not route the digital I2S clock and data through the same area as speaker outputs, and maintain the manufacturer-defined clearances around exposed and switching nodes.
Do not treat the advertised 20 W or 20.2 W rating as a guarantee for every speaker impedance, supply voltage, channel configuration, and enclosure temperature. Confirm the exact test conditions and thermal limits, then verify the selected bridge-tied load. Also validate I2S data alignment, bit depth, sample rate, channel mapping, and clock polarity against the processor configuration before tuning EQ or DRC. These interface details can prevent audible errors even when the amplifier is correctly powered.
合规信息
The supplied verified excerpts do 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 identity.
