TAS5701PAP - 20W Stereo Class-D Amplifier | Texas Instruments
MPN: TAS5701PAP ✓ ActiveTAS5701PAP Overview
A Class-D audio power amplifier is a switching power-conversion device that efficiently delivers audio energy to bridge-tied speakers. The Class-D hierarchy is part of switching amplifiers, audio amplifiers, and broader power-management semiconductors. Unlike a linear output stage, a Class-D design moves most signal amplification into switching transistors, improving efficiency while requiring careful output filtering, power-supply design, and electromagnetic-interference control.
The TAS5701PAP provides 20 W of stereo audio power and accepts digital audio data, making it suitable for consumer audio equipment that receives its source signal from a digital audio codec or processor. Its hardware control interface supports integration into systems requiring amplifier enable, mute, reset, or operating-mode management. The device is offered in a surface-mount HTQFP package with 64 pins and an operating temperature range of 0°C to 85°C.
Internally, the device uses digital audio input and PWM-based output modulation. SDIN1 supplies the left and right stereo channels, while SDIN2 supports dedicated subwoofer PWM outputs. The TAS5701 operates as a clock-slave device, meaning it requires clocks from an external source rather than generating the master audio clock itself. This architecture simplifies synchronization with a digital audio processor but makes the external clock and serial-data timing central to the system design.
Typical applications include compact stereo speakers, powered multimedia speakers, sound bars, active subwoofer systems, and digital audio products requiring a bridge-tied Class-D output stage. The dedicated subwoofer PWM path can support systems combining stereo playback with an additional low-frequency channel. Because the amplifier is not a linear audio amplifier, its supply rails and output filters strongly influence noise, distortion, and EMI behavior.
When implementing this device, use the manufacturer datasheet reference layout and place the input, supply, ground, and output-filter components according to the specified layout. Maintain short high-current supply paths and adequate ground-plane continuity. Check speaker impedance, output-filter component tolerances, thermal conditions, and the external master-clock requirements before releasing the PCB layout.
This page consolidates verified manufacturer and distributor information, strict same-package replacement screening, package and lifecycle details, and practical design guidance. It distinguishes confirmed TAS5701PAP characteristics from parameters that require confirmation in the manufacturer datasheet or current authorized-channel quotation.
Drop-in alternatives for TAS5701PAP — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with TAS5701PAP (same form factor and footprint) — differing in Supply Voltage Range.
TAS5701PAP-P
✅ Drop-In📋 Reference alternative (not in catalog)
TAS5701PAP Maximum Ratings & Electrical Characteristics
| Product Type | Stereo digital-input Class-D audio power amplifier |
| Rated Output Power | 20 W |
| Supply Voltage Range | 0 V to 21 V |
| Audio Channel Configuration | Stereo, with support for up to 3 discrete audio channels |
| Digital Audio Inputs | 2 serial data inputs |
| SDIN1 Routing | Internal left and right outputs |
| SDIN2 Routing | Dedicated SUB_PWM± outputs |
| Output Architecture | Bridge-tied Class-D with PWM outputs |
| Control Interface | Hardware control |
| Clock Architecture | Clock slave-only device |
| Operating Temperature Range | 0°C to 85°C |
| Package Type | 64-pin HTQFP (PAP), 10 x 10 mm |
| Mounting Type | Surface mount |
TAS5701PAP 64-pin htqfp (pap), 10 x 10 mm Pin Configuration Guide
Pin configuration for TAS5701PAP (64-pin htqfp (pap), 10 x 10 mm 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 TAS5701PAP.
Refer to the datasheet for full pin configuration.
Typical Applications
TAS5701PAP is suitable for 6 applications: Powered Stereo Speaker, Compact Sound Bar, Digital Active Subwoofer, Multimedia Speaker System, Consumer Audio Dongle, Digital Speaker Amplifier Module.
Powered Stereo Speaker
The TAS5701PAP fits a powered stereo speaker because it combines a 20-W stereo output rating with digital serial audio input and bridge-tied Class-D output architecture. It can receive stereo data through SDIN1 and use PDM-style clocking supplied by an external audio processor. Placing the amplifier behind the speaker crossover simplifies Class-D filtering while the dedicated SUB_PWM± path supports bass extension.
Recommended
Compact Sound Bar
A compact sound bar can use the TAS5701PAP for its stereo playback section because the device accepts digital audio while providing a 20-W output configuration and separate SUB_PWM± outputs. SDIN1 handles the left and right channels, while SDIN2 can feed the subwoofer path. The system must provide an external master clock and carefully filter the PWM outputs to meet acoustic and EMI requirements.
Recommended
Digital Active Subwoofer
The TAS5701PAP is suitable for an active subwoofer because its second serial input is dedicated to the SUB_PWM± outputs. This allows a digital processor to deliver bass data independently of the stereo SDIN1 channel and supports a 20-W device family for compact enclosures. The implementation must account for subwoofer impedance, low-frequency filtering, supply headroom, and the requirement for an external audio clock.
Recommended
Multimedia Speaker System
The TAS5701PAP can serve as the digital-output amplifier stage in a multimedia speaker system requiring efficient stereo amplification and optional bass output. Its 0- to 21-V supply range supports integration with conventional Class-D power rails, while hardware control permits coordinated mute, reset, and amplifier-state management. Designers should preserve the manufacturer's recommended layout and verify output-filter performance before loudspeaker testing.
Recommended
Consumer Audio Dongle
A low-power consumer audio dongle benefits from the TAS5701PAP because digital audio can be routed directly to a Class-D output stage without separate analog-to-digital and analog-input stages. The 20-W stereo capability can support compact speakers, and the dedicated subwoofer outputs add design flexibility. A host processor must provide serial data, clocking, and hardware-control signals, while careful power and EMI layout is essential in a small enclosure.
Recommended
Digital Speaker Amplifier Module
The TAS5701PAP can be used in a modular digital speaker-amplifier board where an upstream DSP supplies digital audio and synchronization clocks. Its 20-W stereo output and separate SUB_PWM± paths provide a practical multi-channel amplifier foundation in a compact 10 x 10 mm HTQFP footprint. The module design must accommodate supply decoupling, thermal dissipation, EMI filtering, and all 64 package connections.
Recommended
Recommended Products Summary
Engineering reference data for TAS5701PAP — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TAS5701PAP-P |
|---|---|---|
| Package | HTQFP-64 (PAP), 10 x 10 mm | HTQFP-64 (PAP), 10 x 10 mm |
| Brand | Texas Instruments | Texas Instruments |
| Rated Output Power | 20 W | 20 W |
| Supply Voltage Range | 0 V to 21 V | 0 V to 21 V |
| Listed Channel Configuration | 2-channel stereo | 3-channel |
| Digital Audio Inputs | 2 serial data inputs | 2 serial data inputs |
| Subwoofer Output Path | Dedicated SUB_PWM± outputs | Dedicated SUB_PWM± outputs |
| Control Method | Hardware control | Hardware control |
| Operating Temperature Range | 0°C to 85°C | 0°C to 85°C |
| Clock Architecture | Clock slave-only device | Clock slave-only device |
Key Differentiators
- Provides three-channel capability from two serial inputs (vs TAS5701PAP-P)
- Combines stereo and dedicated subwoofer paths (vs TAS5701PAP-P)
- Direct digital-input integration (vs TAS5701PAP-P)
- Defined supply and thermal operating envelope (vs TAS5701PAP-P)
Design Notes
Use the manufacturer's recommended PCB layout and land pattern for the 64-pin HTQFP package. Place high-frequency decoupling and output-filter components close to their associated pins, preserve a continuous ground plane, and avoid routing the digital clock and serial-data signals beneath noisy power-conversion nodes. Confirm all 64 pin assignments against the current datasheet before fabrication because the supplied search excerpts verify the package count but not individual pin names.
Design the supply network for Class-D current transients and the confirmed 0- to 21-V operating range. Use the datasheet-recommended bypass and bulk-capacitance arrangement, keep the high-current return path short, and verify startup behavior. The amplifier requires an external master clock, so power sequencing should prevent transient PWM output before the clock and serial-data interface are stable.
Treat the switching outputs and supply current as potential EMI sources. Use the recommended Class-D output-filter topology, maintain symmetrical speaker routing where practical, and keep the switching loop compact. Validate radiated and conducted emissions on the final enclosure and cable configuration because external clock harmonics, PWM edges, and supply-loop inductance can affect compliance even when the audio output itself is correct.
Do not assume that matching the PAP package guarantees drop-in compatibility. The verified listings distinguish TAS5701PAP as a 2-channel part and TAS5701PAP-P as a 3-channel part, so pin-level behavior, control logic, and output assignments must be checked. Also avoid confusing ordering suffixes, green-assembly codes, and reel configurations with functionally different drop-in alternatives.
Compliance Information
The supplied verified excerpts do not state RoHS, REACH, lead-free, halogen-free, or conflict-minerals status. AEC-Q100 is not applicable because the product is a consumer Class-D audio amplifier and no automotive qualification is identified.
