TAS5122DFD - 30W Stereo Class-D Power Stage | Texas Instruments
料号： TAS5122DFD ✓ 量产中TAS5122DFD 概述
A Class-D digital power stage is an audio amplifier that switches its output between supply rails at a high carrier frequency. Compared with a linear amplifier, this architecture can provide much higher conversion efficiency and lower heat generation in portable and compact audio equipment. The TAS5122DFD operates in the class-D amplifier, digital power amplifier, audio power IC, and power management semiconductor categories.
The main operating characteristics are 30 W per channel into a 6 ohm load, a 0 V to 25.5 V supply range, and a 56-pin HTSSOP package. The PWM interface is intended to receive a digital audio signal from a compatible digital audio processor, while a passive demodulation filter reconstructs the audio waveform at the speaker output. These features make the device suitable for home theater receivers, DVD receivers, mini or micro component systems, and internet music appliances.
The main technical benefit is efficient stereo amplification in a single integrated power-stage package. Because the output stage operates by switching, designers can reduce the heat associated with linear amplification, although filtering, layout, power-supply stability, and speaker impedance remain important. The manufacturer datasheet identifies the TAS5122 family as a high-performance integrated stereo digital amplifier power stage and describes its use with a digital audio PWM processor and passive demodulation filter.
TAS5122DFD is suited to systems requiring two amplified channels, including home theater equipment, DVD receiver output stages, compact stereo systems, and network-connected audio products. It is particularly relevant when a system already uses a digital audio processor because the TAS5122DFD accepts PWM audio rather than conventional analog line-level input. System-level input filtering and gain planning must therefore be matched to the source processor and speaker load.
During layout, follow the manufacturer datasheet recommendations for the exposed pad, power-supply connections, output networks, and high-current ground paths. The HTSSOP thermal pad and surrounding copper are important for heat transfer at higher output power. Confirm the maximum power dissipation for the intended supply voltage, load impedance, channel loading, and ambient temperature before selecting the output-filter components and board construction.
This page combines the manufacturer electrical description with an engineering-focused view of the TAS5122DFD, including application fit, drop-in replacement considerations, layout cautions, and a parameter comparison. It is intended to help designers evaluate the power stage quickly while still using the manufacturer datasheet as the controlling document for ratings, pin connections, and production design details.
直接替换替代料： TAS5122DFD ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
TAS5122DFDR
✅ 直接替换📋 参考替代料（不在目录中）
TAS5122DCARG4
✅ 直接替换📋 参考替代料（不在目录中）
TAS5122DFD 最大额定值与电气特性
| Product Type | Integrated stereo digital amplifier power stage |
| Amplifier Class | Class D |
| Channel Configuration | 2-channel stereo |
| Maximum Output Power | 30 W per channel |
| Recommended Speaker Load | 6 ohm |
| Supply Voltage Range | 0 V to 25.5 V |
| Input Signal Type | PWM |
| Amplifier Technology | PurePath Digital |
| Output Filtering | Passive demodulation filter |
| 封装 | 56-pin HTSSOP |
| Package Style | Pad-down |
| 安装类型 | Surface mount |
| Power Supply Maximum | 25.5 V |
| Output Stage | Integrated H-bridge |
TAS5122DFD pad-down 引脚配置指南
TAS5122DFD（pad-down 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： TAS5122DFD.
请参阅 数据手册 以查看完整引脚配置。
典型应用
TAS5122DFD 适用于 6 应用s: Home Theater Stereo Power Amplifier, DVD Receiver Output Stage, Mini and Micro Component Stereo, Internet Music Appliance, Digital Active Speaker, Compact Stereo Power Amplifier.
Home Theater Stereo Power Amplifier
The TAS5122DFD can provide two 30 W Class-D output channels for powered home theater speakers when the source processor supplies PWM audio. Its 0 V to 25.5 V supply range accommodates typical system rails while the 6 ohm target load matches common passive speakers. The design should include the manufacturer-recommended passive demodulation filter, robust speaker-output routing, and a heat-spreading pad connection because sustained stereo output can dissipate substantial heat in a compact enclosure.
推荐
DVD Receiver Output Stage
A DVD receiver can use the TAS5122DFD as its integrated stereo Class-D speaker-power stage when the system architecture includes a compatible digital audio processor. The device provides up to 30 W per channel into 6 ohm loads and accepts PWM rather than conventional analog audio. The implementation must include the specified output filter and verify channel synchronization, channel mute behavior, and thermal performance across the intended listening-power range.
推荐
Mini and Micro Component Stereo
TAS5122DFD suits compact stereo products that need efficient, integrated amplification in limited board area. Its two-channel Class-D output stage can drive 6 ohm speakers at up to 30 W per channel without requiring a separate analog power-amplifier architecture. System designers should consider the HTSSOP exposed pad, copper area, passive output-filter footprint, and enclosure heat dissipation because efficiency alone does not eliminate the need to remove heat from the power stage.
推荐
Internet Music Appliance
The TAS5122DFD can form the speaker-output section of an internet music appliance that receives decoded digital audio and converts it through a digital audio processor into PWM signals. The Class-D architecture supports compact, efficient amplification for 6 ohm speakers at up to 30 W per channel. Design work should include startup sequencing, standby control, output-filter selection, and thermal validation at the maximum sustained output level expected from the enclosure.
推荐
Digital Active Speaker
A digital active speaker can use the TAS5122DFD as its two-channel Class-D power amplifier when a digital processor handles decoding, volume control, and PWM generation. This arrangement supports 30 W per channel into 6 ohm loads while keeping the audio path digital until the passive speaker filter. The board should reserve space for the manufacturer-specified filter and provide a low-impedance power and ground layout to limit switching losses and thermal rise.
推荐
Compact Stereo Power Amplifier
TAS5122DFD is appropriate for a compact stereo power amplifier built around digital signal generation and two speaker outputs. Its stated 30 W per channel capability provides useful power for desktop, bookshelf, and small room-theater speakers, while the 56-pin HTSSOP package supports surface-mount assembly. The designer must follow the datasheet land pattern and thermal-pad guidance, validate the passive output network, and confirm that the supply can sustain the selected output level without excessive voltage droop.
推荐
工程参考数据： TAS5122DFD ——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 | TAS5122DFDR | TAS5122DCARG4 |
|---|---|---|---|
| Package | 56-pin HTSSOP | 56-pin HTSSOP | 56-pin HTSSOP |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Output Power | Up to 30 W per channel into 6 ohm | Up to 30 W per channel into 6 ohm | Up to 30 W per channel into 6 ohm |
| Channel Configuration | 2-channel stereo | 2-channel stereo | 2-channel stereo |
| Input Signal | PWM | PWM | PWM |
| Target Speaker Impedance | 6 ohm | 6 ohm | 6 ohm |
| Amplifier Technology | PurePath Digital Class-D | PurePath Digital Class-D | PurePath Digital Class-D |
| Output Filtering | Passive demodulation filter | Passive demodulation filter | Passive demodulation filter |
| Ordering Configuration | TAS5122DFD | Alternate ordering suffix for the same device family | Alternate family ordering suffix; verify mechanical details |
关键差异点
- Two-channel integration in one power-stage package （对比 TAS5122DCARG4)
- Direct integration with a digital audio processing chain （对比 TAS5122DFDR)
- High output capability for a compact surface-mount power stage （对比 TAS5122DCARG4)
设计说明
Connect the HTSSOP exposed pad to a continuous copper area and follow the manufacturer land-pattern guidance. Estimated: thermal performance depends on the actual supply voltage, load impedance, output power, channel activity, ambient temperature, copper area, and enclosure airflow; calculate junction temperature from those values because the product record does not establish a board-specific thermal resistance. Increase copper area or reduce maximum output power if the estimate approaches the device limit.
Use the manufacturer datasheet land pattern and assign all 56 pins from its pin-description table. Place the passive output-filter components directly at the Class-D speaker outputs, keep switching-current loops compact, and provide low-impedance power and ground connections. The exposed pad is not a substitute for the individual ground pins, and routing speaker-current returns through sensitive signal ground can introduce audible noise or instability.
The power supply must support the 0 V to 25.5 V operating range and the current demanded by the selected output level into 6 ohm speakers. Estimated: at 30 W per channel, a 6 ohm load requires approximately 2.0 A per channel at the speaker output before accounting for switching losses and filter current. Add appropriate supply decoupling, verify startup sequencing, and avoid relying on a 30 W headline rating without checking thermal and supply limits.
Do not treat TAS5122DFD as an analog line-input amplifier; it expects PWM signals from a compatible digital audio processor. Confirm the processor's signal format, clocking requirements, mute polarity, differential or common-mode signal arrangement, and gain setup. Also verify the exact exposed-pad and lead dimensions before replacing TAS5122DFD with a similarly named ordering suffix, since package marking alone does not establish mechanical compatibility.
合规信息
The manufacturer product page and datasheet link identify the TAS5122 family, but the supplied product record does not provide explicit compliance declarations.
