TAS5708PHP - 20W Stereo Class-D Audio Amplifier | Texas Instruments
部品番号: TAS5708PHP ✓ 生産中TAS5708PHP 概要
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.
ドロップイン代替品: TAS5708PHP — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: TAS5708PHP （同一形状・フットプリント） — 相違点: Package, Product Type, Rated Output Power, Digital Audio Input, Output Configuration.
TAS5710PHP
✅ ドロップイン価格はお問い合わせください
データシートを見る →TAS5711PHP
✅ ドロップイン ⚠️ 仕様未検証価格はお問い合わせください
データシートを見る →TAS5708PHP 最大定格＆電気的特性
| 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 |
| 出力構成 | Stereo bridge-tied speakers |
| On-Chip Dynamic Range Control | Yes |
| On-Chip Speaker Equalization | Yes |
| パッケージ | 48-pin HTQFP (PHP), 7 mm x 7 mm |
| 実装タイプ | Surface mount |
| RoHS ステータス | unknown |
| REACH Status | unknown |
| AEC-Q100 Qualification | unknown |
TAS5708PHP 48-pin htqfp (php), 7 mm x 7 mm ピン配置ガイド
TAS5708PHP (48-pin htqfp (php), 7 mm x 7 mm パッケージ) のピン配置。 このアナログコンポーネントは、入力、出力、および電源ピンを備えています。オフセットナル、補償、イネーブルピンの設定については、メーカーのデータシートを参照してください。信号調整やアンプ回路に最適です。
詳細なピン配置データはありません: TAS5708PHP.
詳細は データシート をご参照ください。
主な用途
TAS5708PHP の用途: 6 件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.
エンジニアリング参考データ: TAS5708PHP — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | 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 |
主な差別化要因
- Documented integrated digital audio processing （vs TAS5710PHP)
- Complete manufacturer-supported function set （vs TAS5711PHP)
- Verified 20.2 W distributor power rating （vs TAS5710PHP)
設計ノート
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.
コンプライアンス情報
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.
