TAS5709PHP - 20W Stereo Class-D Amplifier | Texas Instruments
MPN： TAS5709PHP ✓ 啟用中TAS5709PHP 概覽
A Class-D audio power amplifier is a switching power stage that converts digital audio signals into high-efficiency bridge-tied speaker drive. Within the broader hierarchy, the TAS5709PHP belongs to the digital audio amplifier class, then audio amplifiers, then amplifier ICs and analog/mixed-signal semiconductors. Its digital input and integrated processing allow a host processor to deliver audio directly without requiring a separate analog-to-digital converter or pre-amplifier stage.
The device provides 20 W stereo output, operates from an 8 V to 24 V supply, and supports digital audio input through a serial interface. On-chip speaker EQ and dynamic range control provide programmable acoustic functions before the signal reaches the power stages. These functions make the amplifier useful where cabinet, speaker, and source characteristics require system-level audio adjustment rather than fixed analog gain alone.
Technically, the TAS5709PHP integrates a digital signal-processing path with two Class-D output channels designed to drive stereo bridge-tied speakers. The verified manufacturer information identifies the device as an open-loop Class-D amplifier, meaning the IC is intended for use with external closed-loop feedback circuitry. System designers must therefore account for the feedback network, filtering requirements, output configuration, and protection strategy when developing the speaker-amplifier stage.
Typical uses include stereo speaker amplification in consumer electronics, audio racks, television systems, and embedded digital-audio products. Its digital input can simplify connections to audio processors, MPEG decoders, and digital audio sources, while integrated EQ and dynamic range control can reduce the amount of host-side processing required for common speaker-management functions.
A key design consideration is the relationship between supply voltage, speaker impedance, thermal dissipation, and Class-D output filtering. The amplifier should be placed near the speaker connectors, with its power and ground system designed to minimize switching noise and output-stage instability. Verify the external feedback and filter topology against the manufacturer datasheet before production use.
This page consolidates verified manufacturer and distributor information, practical design guidance, and clearly qualified replacement considerations. It also separates confirmed same-family parts from candidates whose pin compatibility cannot be established from the supplied web evidence, helping engineers make sourcing decisions without treating merely similar devices as true drop-in replacements.
直接替換替代品，適用於 TAS5709PHP — 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： TAS5709PHP （相同外形與佔位） — 差異在於 Package, Product Type.
TAS5709PHPR
✅ 直接替換📋 參考替代品（不在目錄中）
TAS5710PHPR
✅ 直接替換📋 參考替代品（不在目錄中）
TAS5711PHP
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →TAS5715PHPR
✅ 直接替換📋 參考替代品（不在目錄中）
TAS5707PHPR
✅ 直接替換📋 參考替代品（不在目錄中）
TAS5709PHP 最大額定值與電氣特性
| Product Type | Stereo digital audio power amplifier |
| Number of Output Channels | 2 channels |
| Output Power | 20 W stereo |
| Amplifier Class | Class D |
| Supply Voltage Range | 8 V to 24 V |
| Input Type | Digital input |
| 輸出配置 | Bridge-tied stereo speaker drive |
| Feedback Architecture | Open loop |
| Speaker Equalization | On-chip speaker EQ |
| Dynamic Range Control | On-chip DRC |
| 封裝 | 48-pin HTQFP (PHP), 7 mm x 7 mm |
| 安裝類型 | Surface mount |
| Datasheet Page Count | 59 pages |
TAS5709PHP 48-pin htqfp (php), 7 mm x 7 mm 腳位配置指南
TAS5709PHP（48-pin htqfp (php), 7 mm x 7 mm 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： TAS5709PHP.
請參閱 資料表 以查看完整腳位配置。
典型應用
TAS5709PHP 適用於 6 應用s: Stereo Consumer Speaker Amplifier, Digital Audio Rack Amplifier, Television and Monitor Audio, Portable Speaker and Dock, Smart Speaker and IoT Audio Node, Multimedia Speaker System.
Stereo Consumer Speaker Amplifier
The TAS5709PHP fits a compact stereo speaker stage because it provides two 20 W Class-D output channels, accepts digital audio, and operates from an 8 V to 24 V supply. A host processor can send the serial audio stream directly to the amplifier, reducing the need for a separate digital-to-analog converter and pre-amplifier. On-chip speaker EQ and dynamic range control provide system-level acoustic adjustment without consuming additional host processing resources. Because the verified manufacturer information describes an open-loop device, the final design still requires the specified external feedback and output-filter implementation. Thermal sizing should use the actual supply voltage and speaker impedance rather than the headline 20 W stereo rating alone.
推薦
Digital Audio Rack Amplifier
A rack-mounted active speaker is a practical application for the TAS5709PHP because its digital input supports a clean connection to the source processor while its two Class-D channels drive left and right speakers. The 20 W stereo capability is suited to compact near-field or secondary listening positions, while speaker EQ and dynamic range control help the system accommodate different drivers and listening levels. The amplifier’s 8 V to 24 V operating range allows integration with a conventional internal supply, subject to thermal limits. For a low-noise rack product, provide local decoupling and isolate the digital input and switching output return paths to prevent amplifier ripple from reaching sensitive source circuitry.
推薦
Television and Monitor Audio
The TAS5709PHP can provide a compact stereo speaker drive solution for televisions, monitors, and display products that already use a digital audio processor. Digital input reduces the number of analog stages between the main processor and the power stage, while the integrated EQ and DRC support predictable output behavior across different panel-mounted speakers. Its 7 mm x 7 mm 48-pin HTQFP package also supports dense board layouts compared with a discrete output solution. The key engineering trade-off is EMI: the switching Class-D outputs require carefully placed filters and grounding so conducted and radiated emissions do not interfere with display, radio, or control circuitry.
推薦
Portable Speaker and Dock
The TAS5709PHP is suitable for a portable speaker dock when the product uses a digital-audio source and can allocate an 8 V to 24 V power rail. Its two Class-D channels support stereo playback, and integrated speaker EQ and dynamic range control can adapt output behavior to compact drivers commonly used in portable products. The compact 48-pin HTQFP package supports space-constrained board construction, although thermal management remains critical when the output stage operates near its 20 W stereo rating. Designers should minimize trace impedance in supply connections, maintain the recommended capacitor placement, and compare available battery-derived rails against the minimum operating voltage to avoid clipping or unstable behavior.
推薦
Smart Speaker and IoT Audio Node
The TAS5709PHP can serve as the output stage of a smart speaker or IoT audio node whose application processor or network module already produces a digital audio stream. Direct digital connectivity reduces analog interconnects and permits software-controlled EQ and level management close to the speaker. Its 20 W stereo output is suitable for compact premium speakers, while the 8 V to 24 V supply range supports multiple system architectures. The design must still separate sensitive microphone and network circuits from the switching power stage. Use short return paths, careful output-filter placement, and controlled clocking of the digital interface to minimize EMI coupling and startup transients in always-on products.
推薦
Multimedia Speaker System
The TAS5709PHP fits multimedia speaker systems requiring two amplified channels and a digital connection to an audio host. Its 20 W stereo Class-D output provides a straightforward route to passive speakers, while integrated EQ and DRC support consistent sound across multiple product configurations. A multimedia system can also use the digital interface to keep source data away from analog input traces, helping preserve signal integrity. Integration is not entirely plug-and-play because the verified device is described as open-loop: the external feedback network and output filters must follow the manufacturer reference design. Validate filter component selection against amplifier stability and the chosen speaker inductance before production.
推薦
推薦產品摘要
工程參考資料，適用於 TAS5709PHP — 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 | TAS5709PHPR | TAS5710PHPR | TAS5711PHP | TAS5715PHPR | TAS5707PHPR |
|---|---|---|---|---|---|---|
| Package | 48-pin HTQFP (PHP) | 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 |
主要差異化特點
- Directly documented 20 W stereo configuration (對比TAS5715PHPR)
- Confirmed open-loop architecture with speaker processing (對比TAS5710PHPR)
- Documented 8 V to 24 V supply range (對比TAS5711PHP)
- Manufacturer-confirmed PHP package option (對比TAS5709PHPR)
設計說明
Place the TAS5709PHP close to its speaker output connector and follow the manufacturer layout for the external output filters and feedback components. Keep the Class-D output paths compact and symmetrical, and route them away from microphone, antenna, and clock-sensitive circuits. Accurate output-filter placement reduces switching-edge energy at the connector and helps maintain stability.
Use the manufacturer-recommended input, output, and bypass capacitors at the device pins, including short ground returns. Estimated: power dissipation equals the difference between supply voltage and speaker-average output voltage multiplied by average output current; calculate it with the actual rail and load rather than the 20 W headline rating. Confirm that the 8 V to 24 V operating range covers startup, transient, and idle conditions.
Treat the switching output stage as a deliberate EMI source. Ground the output-filter return correctly, avoid long copper areas that act as antennas, and maintain a continuous ground reference beneath the device where supported by the recommended layout. Validate radiated emissions at the product enclosure level because filtering that passes conducted testing may not guarantee acceptable cabinet-level radiation.
Do not assume that a related TI PHP-package amplifier is automatically interchangeable. Compare pin names, exposed thermal and power connections, digital clocking, control software, feedback topology, output filters, and recommended PCB geometry. For a production substitution, perform side-by-side schematic review and confirm the alternative against the manufacturer datasheet before releasing a revised BOM.
合規資訊
The supplied verified snippets do not contain explicit RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals statements. These fields must be confirmed from the current Texas Instruments product documentation or manufacturer declaration.
