TAS5122DCA - 50W Stereo Class-D Power Stage | TI
MPN： TAS5122DCA ✓ 啟用中TAS5122DCA 概覽
A Class-D audio power amplifier is an efficient switching amplifier that uses pulse-width-modulated signals to drive a passive loudspeaker through a demodulation filter. The TAS5122DCA belongs to the digital audio amplifier hierarchy: Class-D amplifier, integrated stereo power stage, audio amplifier IC, and power-management semiconductor. Unlike an analog input amplifier, it does not directly accept a conventional audio waveform; it requires PWM-compatible digital audio signaling.
Key features include two-channel stereo operation, a 50 W stereo power rating, PWM signal compatibility, and TI PurePath Digital technology. The device is intended for use with a TAS50XX-family digital audio PWM processor and a passive output filter. Its DC-coupled speaker output architecture supports efficient conversion of digital audio power into analog speaker drive without requiring a traditional analog power-output stage.
The architecture separates digital signal generation from analog power amplification. A compatible audio processor generates the PWM waveform, while the TAS5122DCA performs the high-current switching function and drives the speaker network. This division allows system designers to use a digital signal-processing path for decoding, volume control, channel mixing, and protection while retaining efficient Class-D output-stage behavior.
Typical applications include DVD receivers, home-theater systems, mini and micro component systems, and internet music appliances. These products benefit from compact digital audio processing, efficient speaker drive, and a direct connection between a PWM audio processor and the integrated stereo power stage. A passive LC demodulation filter is used between the amplifier outputs and the loudspeakers to recover the audio waveform.
Power-supply design must accommodate the amplifier's stated 0 V to 25.5 V supply range and provide sufficient current for the intended speaker load. The HTSSOP package includes a thermal pad for heat dissipation, making copper-area and thermal via placement important on multilayer printed circuit boards. Stable operation also depends on correct output-filter selection and proper decoupling of the power rails.
This page combines the manufacturer's device description, package and application details, drop-in alternatives, comparison information, and practical layout guidance. It helps engineers identify the TAS5122DCA for efficient digital speaker amplification while separating known device characteristics from parameters that require confirmation against the latest manufacturer documentation.
直接替換替代品，適用於 TAS5122DCA — 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。
此產品無可直接替換的替代品。
申請替代品TAS5122DCA 最大額定值與電氣特性
| Product Type | Stereo Class-D audio power amplifier |
| 輸出配置 | 2-channel stereo |
| Stereo Output Power | 50 W |
| Maximum Power per Channel | 30 W into 6 ohms |
| Supply Voltage Range | 0 V to 25.5 V |
| Input Signal Type | PWM |
| Audio Technology | PurePath Digital |
| Compatible Processor Family | TAS50XX digital audio PWM processor |
| Output Stage | Integrated stereo digital amplifier power stage |
| Output Filter Requirement | Passive demodulation filter |
| 封裝 | HTSSOP-56 (DCA) |
| 腳位數 | 56 pins |
| 安裝類型 | Surface mount |
| Package Thermal Feature | Exposed thermal pad |
TAS5122DCA exposed thermal pad 腳位配置指南
TAS5122DCA（exposed thermal pad 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： TAS5122DCA.
請參閱 資料表 以查看完整腳位配置。
典型應用
TAS5122DCA 適用於 6 應用s: Home Theater Stereo Amplifier, DVD Receiver Speaker Output, Compact Stereo Music System, Internet Music Appliance, Mini Component Stereo System, Digital Speaker Amplifier Module.
Home Theater Stereo Amplifier
The TAS5122DCA fits a home-theater stereo output stage because it delivers up to 30 W per channel into 6-ohm speakers from a 0 V to 25.5 V supply. A TAS50XX-compatible digital audio processor can provide decoded channel data, volume control, and PWM signals, while the TAS5122DCA provides efficient switching power amplification. The finished amplifier requires passive demodulation filters, a high-current supply, and careful thermal design around the HTSSOP exposed pad.
推薦
DVD Receiver Speaker Output
The TAS5122DCA is appropriate for a DVD receiver that combines digital audio decoding with passive speaker drive. Its 50 W stereo architecture and 30 W per-channel capability into 6 ohms provide useful output power while the PWM interface keeps the audio path digital. The receiver power supply should remain within the 0 V to 25.5 V operating range, and the output filters must be designed for the switching waveform and intended speaker impedance.
推薦
Compact Stereo Music System
The TAS5122DCA supports compact stereo systems where efficient digital amplification and integrated power-stage functionality simplify the signal chain. Its 50 W stereo rating is intended for higher-power passive speaker configurations, including the manufacturer's stated 6-ohm, 30 W-per-channel condition. Placement close to the output filter and speaker connectors helps control board area, while the exposed pad must be tied to the thermal and ground system using the manufacturer's layout guidance.
推薦
Internet Music Appliance
The TAS5122DCA is suitable for an internet music appliance that decodes digital audio and drives passive speakers without a conventional analog power-output chain. The PWM-input power stage can work with a compatible digital audio processor, reducing the number of signal-conversion stages and supporting an efficient end-to-end digital architecture. Supply capacity, output-filter losses, enclosure cooling, and speaker impedance remain the principal design constraints for reliable playback.
推薦
Mini Component Stereo System
The TAS5122DCA fits a mini component stereo system requiring substantial speaker output from a compact digital audio architecture. The 50 W stereo designation and 30 W per-channel capability into 6 ohms align with compact passive speakers, while the PWM input supports integration with digital decoding and volume-control circuitry. A practical implementation needs a stable high-current supply, passive output filtering, and PCB copper that adequately removes heat from the 56-pin HTSSOP power stage.
推薦
Digital Speaker Amplifier Module
The TAS5122DCA can form the power-amplifier section of a modular digital speaker system. Its integrated stereo architecture accepts PWM signals from an upstream processor and delivers up to 30 W per channel into 6-ohm loads, making it suitable for a dedicated amplifier board. The module design should define the passive filter topology and thermal boundary early, provide local supply bypassing, and keep switching-current loops short to reduce power-distribution noise.
推薦
推薦產品摘要
工程參考資料，適用於 TAS5122DCA — 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 |
|---|---|
| Brand | Texas Instruments |
| Package | HTSSOP-56 (DCA) |
| Output Configuration | 2-channel stereo |
| Stereo Output Power | 50 W |
| Power per Channel | 30 W into 6 ohms |
| Supply Voltage Range | 0 V to 25.5 V |
| Input Architecture | PWM input |
| Audio Technology | PurePath Digital |
| Pin Count | 56 pins |
| Output Filter | Passive demodulation filter |
設計說明
Treat the DCA exposed pad as the principal thermal path for the 56-pin HTSSOP power stage. Provide uninterrupted top-layer copper beneath the device, connect it to the manufacturer-recommended ground and thermal structure, and add thermal vias where the PCB construction permits. Estimate: with a 50 W stereo output rating, actual continuous dissipation depends on supply voltage, output power, load, and efficiency; calculate worst-case conduction loss before defining copper area or enclosure cooling.
Place the input, output, and supply decoupling components directly beside their associated pins. Keep the high-current switching loop between the power-stage pins, supply capacitors, and ground return physically small. The HTSSOP footprint also requires thermal-via placement that avoids compromising electrical isolation or the manufacturer's recommended exposed-pad connection. Confirm the exact pin assignments and recommended land pattern in the Texas Instruments TAS5122 datasheet before releasing artwork.
Design the passive output network for the PWM switching waveform, speaker impedance, channel-to-channel matching, and intended acoustic bandwidth. Place the demodulation filter close to the amplifier outputs and speaker connectors so that high-current switching paths do not cross sensitive signal routes. Validate filter behavior, speaker loading, thermal performance, and electromagnetic compatibility in the final enclosure rather than relying on a simulated 6-ohm load alone.
Do not treat the 50 W stereo rating as the result of connecting conventional analog audio to the device. The TAS5122DCA requires PWM signals from a compatible digital audio processor, and its output requires a passive demodulation filter. Also avoid operating the supply above the stated 25.5 V maximum or using a speaker impedance below the design target without reevaluating current, distortion, protection behavior, and thermal limits.
合規資訊
Compliance status is not stated in the cited manufacturer and distributor records.
