TAS5704PAP - 20W Stereo Class-D Amp | Texas Instruments
MPN: TAS5704PAP ✓ ActiveTAS5704PAP Overview
A Class-D audio power amplifier is a switching amplifier within the broader hierarchy of audio amplifiers, analog and mixed-signal ICs, and semiconductor signal-processing devices. Instead of operating the output transistor continuously as a linear amplifier, it uses a switching output stage to convert a digital or analog audio signal into high-efficiency bridge-tied speaker drive. The TAS5704 integrates digital signal processing, modulation, and output-stage functions into one device.
Key features include 20 W per stereo channel into an 8 ohm load from an 18 V supply, two serial digital audio inputs supporting up to four discrete channels, and a hardware-configurable data path. These features allow the amplifier to interface with compatible digital audio processors while providing system-level control over channel routing, speaker EQ, DRC, and mute or shutdown behavior.
The device uses a digital audio datapath and a feedback architecture to monitor the Class-D output stage. The two serial inputs accept multiple discrete channels and operate with digital processors that support compatible data formats and clock rates. An exposed thermal pad beneath the 64-pin package provides the primary heat-transfer path from the power amplifier and control circuitry to the PCB.
Typical uses include compact stereo speakers, powered Bluetooth and Wi-Fi speaker systems, soundbars, consumer audio equipment, and other products that require a digital Class-D output stage with local EQ and DRC. The integrated processing can reduce the need for separate audio DSP components when the required presets and routing functions are supported by the TAS5704 configuration.
PCB design should preserve the exposed-pad thermal path with a continuous ground plane and via array, place power-supply and ground connections close to the device, and route sensitive clock and serial-data lines away from switching-node conductors. Speaker and supply connections must also be sized for the intended output power; otherwise connector, copper, and thermal limitations can restrict real-world output below the stated 20 W condition.
Drop-in alternatives for TAS5704PAP — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
No drop-in alternatives available for this product.
Request AlternativesTAS5704PAP Maximum Ratings & Electrical Characteristics
| Product Type | Stereo or quad-channel digital-input Class-D audio power amplifier |
| Maximum Output Power | 20 W per channel into 8 ohm from an 18 V supply |
| Supply Voltage Range | 10 V to 26 V |
| Audio Output Configuration | 2-channel stereo or 4-channel quad |
| Digital Audio Input | 2 serial data inputs supporting up to 4 discrete audio channels |
| Output Architecture | Class-D bridge-tied speaker drive |
| Feedback Architecture | Digital audio power amplifier with feedback |
| Speaker Equalization | Supported |
| Dynamic Range Control | Supported |
| Hardware Control | Supported |
| Data Path Configuration | Hardware configurable |
| Operating Temperature Range | 0 C to 85 C |
| Package | 64-pin HTQFP (PAP), 10 mm x 10 mm, exposed pad |
| Mounting Type | Surface mount |
| Packaging | Tray |
TAS5704PAP 64-pin htqfp (pap), 10 mm x 10 mm, exposed pad Pin Configuration Guide
Pin configuration for TAS5704PAP (64-pin htqfp (pap), 10 mm x 10 mm, exposed pad package). This analog component features input, output, and power supply pins. Refer to the manufacturer datasheet for offset null, compensation, and enable pin configurations. Ideal for signal conditioning and amplifier circuits.
No detailed pinout data available for TAS5704PAP.
Refer to the datasheet for full pin configuration.
Typical Applications
TAS5704PAP is suitable for 6 applications: Compact Stereo Speaker, Bluetooth Speaker, Wi-Fi Network Speaker, Soundbar Speaker Module, Consumer Audio Equipment, Digital Headphone Amplifier Reference.
Compact Stereo Speaker
The TAS5704PAP fits compact stereo speakers that accept a digital audio stream and require 20 W per channel into 8 ohm from an 18 V supply. Its two serial inputs provide flexibility for connecting and routing multiple discrete channels, while integrated speaker EQ and DRC can simplify the signal-processing chain. The device is placed after the digital audio source and before the class-D output filtering network. Designers should confirm that the host processor supplies a compatible serial format and clock, then budget the exposed-pad copper area for continuous Class-D output. A single 18 V supply matches the published 20 W condition, while a lower supply may require a different power calculation.
Recommended
Bluetooth Speaker
The TAS5704PAP is appropriate for a Bluetooth speaker when the wireless audio receiver or decoder can provide a compatible digital stream. Its 10 V to 26 V supply range and 20 W-per-channel output into 8 ohm at 18 V support efficient bridge-tied speaker drive. Integrated EQ and DRC allow the amplifier stage to perform part of the loudspeaker optimization without a separate processor. The implementation must preserve the required serial clock, route mute and shutdown controls correctly, and maintain a low-impedance supply path. Heat generated by the switching stages should be removed through the exposed pad and surrounding copper, particularly during sustained high-volume playback.
Recommended
Wi-Fi Network Speaker
The TAS5704PAP suits a Wi-Fi network speaker because it accepts digital audio and combines channel routing, equalization, dynamic range control, and Class-D output in one IC. Two serial inputs can accommodate as many as four discrete channels, allowing a compatible host processor to feed the required stereo or quad-channel arrangement. The amplifier is placed between the network audio decoder and the speaker output stage, with local feedback and output filtering selected according to the manufacturer guidance. Verification should cover sample rates, clocking, latency, mute behavior, and the distinction between a hardware-configurable data path and software-programmable DSP behavior.
Recommended
Soundbar Speaker Module
The TAS5704PAP can support a soundbar speaker module where a digital source, compact enclosure, and stereo output are required. Its 20 W per channel capability into an 8 ohm load at 18 V provides a defined benchmark, and integrated DRC helps manage level differences while EQ supports loudspeaker response shaping. The implementation should keep the digital clock and serial-data traces away from switching outputs, use a low-impedance supply layout, and verify inductor selection and speaker-filter requirements. Because soundbar enclosures can restrict airflow, thermal design should be based on actual board copper and sustained output rather than the nominal power rating alone.
Recommended
Consumer Audio Equipment
The TAS5704PAP is appropriate for powered consumer-audio equipment requiring efficient stereo reproduction from a digital source. The device combines two serial audio inputs, configurable routing, speaker EQ, DRC, hardware control, and a feedback-equipped Class-D output stage. Placing it at the end of the digital signal chain reduces the need for separate output-processing circuitry when the required functions fit. System validation must include clock-rate compatibility, serial-data format, control polarity, startup sequencing, and thermal performance. The 0 C to 85 C operating range makes the device suitable for many indoor products, while the system must still satisfy regional EMC and product-safety requirements.
Recommended
Digital Headphone Amplifier Reference
The TAS5704PAP is relevant to digital headphone and line-output reference designs that need integrated digital gain control, EQ, DRC, and an efficient Class-D output stage. Although its primary product positioning is bridge-tied speaker drive, the configurable datapath can support compatible headphone-driver architectures when the selected TI configuration and external circuitry meet the signal and current requirements. Engineers should verify the exact supported routing mode rather than infer compatibility solely from the 20 W speaker-amplifier headline. Output filters, protection, grounding, and the load presented by the headphone driver must also be evaluated because the published 8 ohm, 18 V condition does not describe every possible load.
Recommended
Recommended Products Summary
Engineering reference data for TAS5704PAP — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product |
|---|---|
| Package | 64-pin HTQFP (PAP), 10 mm x 10 mm, exposed pad |
| Brand | Texas Instruments |
| Output Power | 20 W per channel into 8 ohm at 18 V supply |
| Supply Voltage Range | 10 V to 26 V |
| Channel Support | Stereo or quad mode |
| Serial Audio Inputs | 2 serial inputs supporting up to 4 discrete channels |
| Speaker EQ | Supported |
| Dynamic Range Control | Supported |
| Operating Temperature Range | 0 C to 85 C |
Key Differentiators
- Broader digital input flexibility than the verified TAS5711 comparison (vs TAS5711PHPR)
- Integrated channel routing and loudspeaker processing (vs TAS5710PHPR)
- Defined high-power stereo operating point (vs TAS5711PHPR)
Design Notes
Treat the PAP exposed pad as the principal thermal path for the Class-D output and control circuitry. Use a continuous PCB ground plane beneath the device and a dense array of short thermal vias within the manufacturer-recommended pad area. Avoid splitting this plane with high-current routing. Validate sustained output at the highest expected volume, ambient temperature, supply voltage, and speaker impedance because the published 20 W condition alone does not guarantee temperature margin in a sealed enclosure.
Place input, output, supply, and decoupling connections to minimize loop area. Keep the high-current Class-D switching nodes compact and isolated from serial-data, clock, and feedback-routing areas. Provide a low-impedance supply plane and local bulk and high-frequency decoupling. Follow the manufacturer layout and output-filter guidance for the selected configuration; changing output inductors, speaker filters, or grounding topology without validation can alter filtering, stability, EMI, and thermal performance.
Do not infer that any 20 W stereo Class-D amplifier is a drop-in replacement. Verify the 64-pin PAP footprint, exposed pad, power pins, grounds, clocks, serial inputs, control signals, and speaker outputs individually. Also confirm the host audio format and sample rate. The supplied comparison results identify TAS5711 and TAS5710 products with related functionality, but they do not establish pin-to-pin equivalence, so a footprint change or redesign may be required.
Reserve the PCB area for the Class-D LC output filters and keep their switching-current loops compact. Route the filtered speaker outputs away from clocks, serial data, and sensitive analog sections. A grounded guard or keep-out region can help control coupling, but the exact filter and layout must follow the manufacturer reference design. EMI performance depends on switching behavior, supply layout, chassis grounding, cable length, and the selected enclosure, so near-field measurements should be part of production validation.
Compliance Information
The supplied verified extracts do not explicitly establish RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status for the target part. AEC-Q100 is marked not applicable because the device is an audio amplifier rather than an automotive-qualified device, but that does not constitute an automotive qualification claim.
