TAS5142DKD - 100W Stereo Class-D Amplifier | Texas Instruments
MPN: TAS5142DKD ✓ ActiveTAS5142DKD Overview
A Class-D audio amplifier is a switching power amplifier that uses pulse-width modulation to reproduce audio signals with high efficiency. It belongs to the hierarchy of amplifier ICs, audio amplifiers, power amplifiers, and power-management semiconductors. Compared with a conventional linear Class-AB output stage, a Class-D design can reduce power dissipation in the output stage and support higher output power from a compact package, although switching-node design still requires careful filtering and layout.
The TAS5142DKD can drive a 4 ohm bridge-tied load at up to 100 W per channel in stereo operation. It can also be configured for 200 W mono operation according to the Texas Instruments product page. Its integrated digital power stage includes an improved protection system, low integrated output noise, low THD+N performance, and low idle power dissipation. These characteristics suit consumer audio equipment, powered speakers, home-theater systems, and compact multimedia products.
The DKD package provides 36 pins and an exposed thermal pad for heat dissipation. The thermal pad and exposed-lead soldering process are central to achieving the stated output-power capability, while the analog supply operates from 10.8 V to 13.2 V. The device accepts a PWM audio input, allowing it to operate after a digital audio source has already been converted into a PWM representation.
Typical uses include powered bookshelf speakers, compact stereo amplifiers, home-theater receivers, soundbar amplification, and multimedia speaker systems. A 4 ohm stereo configuration supports up to 100 W per channel, while parallel-channel or mono arrangements can address applications requiring up to 200 W. Output inductors, LC filters, speaker connections, and thermal management remain part of the complete power-amplifier design.
For reliable operation, use the manufacturer’s recommended PCB land pattern and thermal-pad soldering process, keep high-current output paths compact, and connect the exposed thermal pad to an effective copper heat-spreading area. Speaker loads must remain within the device’s supported limits, and the output-filter design must preserve the intended audio bandwidth while controlling switching artifacts.
This page organizes the verified device specifications, drop-in sourcing information, application fit, and practical layout guidance in one engineering-focused reference. It also identifies package and lifecycle details that should be checked against the current Texas Instruments documentation before committing a new production design.
Drop-in alternatives for TAS5142DKD — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
TAS5142DKDG4
✅ Drop-In📋 Reference alternative (not in catalog)
TAS5142DKD Maximum Ratings & Electrical Characteristics
| Device Type | Stereo digital amplifier power stage |
| Amplifier Class | Class-D |
| Input Signal Type | PWM |
| Stereo Output Power | 100 W |
| Maximum Stereo Output Power per Channel | 100 W into 4 ohm bridge-tied load |
| Mono Output Power | 200 W |
| Power Supply Range | 0 V to 34 V |
| Analog Supply Range | 10.8 V to 13.2 V |
| Channel Count | 2 channels |
| Supported Speaker Load | 4 ohm bridge-tied load |
| Package Type | 36-pin HSSOP with exposed thermal pad |
| Pin Count | 36 pins |
| Mounting Type | Through-hole HSSOP |
| Protection System | Improved integrated protection system |
TAS5142DKD 36-pin hssop with exposed thermal pad Pin Configuration Guide
Pin configuration for TAS5142DKD (36-pin hssop with exposed thermal 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 TAS5142DKD.
Refer to the datasheet for full pin configuration.
Typical Applications
TAS5142DKD is suitable for 6 applications: Powered Bookshelf Speakers, Compact Stereo Amplifier, Home-Theater Amplifier, Soundbar Speaker Amplification, Multimedia Speaker Systems, Portable High-Power Speaker.
Powered Bookshelf Speakers
The TAS5142DKD fits powered bookshelf speakers requiring up to 100 W per stereo channel from a 4 ohm bridge-tied load. Its PWM input lets the power stage operate downstream of a digital audio processor, while the integrated protection system supports a robust speaker interface. The 36-pin HSSOP and exposed thermal pad provide a practical route to high output power, although PCB copper area and the manufacturer-recommended output network remain essential to sustained thermal performance.
Recommended
Compact Stereo Amplifier
A compact stereo amplifier can use the TAS5142DKD for two 100 W channels when speaker impedance is 4 ohms and the analog supply operates from 10.8 V to 13.2 V. The Class-D architecture supports efficient conversion of the PWM signal into speaker drive current. Design the output inductors and filtering capacitors from the manufacturer application circuit, and provide sufficient exposed-pad soldering and copper area to remove heat from the power stage.
Recommended
Home-Theater Amplifier
The TAS5142DKD suits home-theater power-amplifier channels where low idle dissipation and high stereo output capability are valuable. A single stereo configuration can deliver 100 W per channel into 4 ohm bridge-tied speakers, and the documented family also supports a 200 W mono configuration. The PWM input is compatible with an upstream cinema processor, while the integrated protection system helps manage abnormal speaker-load conditions.
Recommended
Soundbar Speaker Amplification
For soundbar amplification, the TAS5142DKD can drive left and right channels at up to 100 W each into 4 ohm loads when the power-supply and thermal design meet the manufacturer limits. Its integrated digital power stage reduces the number of discrete output devices required. The exposed thermal pad should be tied to a carefully designed copper heat spreader, and high-current speaker paths should remain short and separated from sensitive input routing.
Recommended
Multimedia Speaker Systems
The TAS5142DKD provides ample output capability for multimedia speaker systems requiring 100 W-class stereo channels. A PWM source can feed the amplifier directly after suitable digital signal processing, and the device offers an improved integrated protection system for speaker-interface robustness. Its 36-pin HSSOP package is mechanically larger than a QFN alternative, but the leaded format and exposed pad can simplify inspection and thermal-pad assembly in production.
Recommended
Portable High-Power Speaker
The TAS5142DKD can form the output stage of a portable or transportable high-power speaker when its 10.8 V to 13.2 V analog supply range is compatible with the system. Stereo operation can provide 100 W per channel into 4 ohm loads, while Class-D operation limits dissipation relative to a linear output stage. Battery design should account for the higher current drawn at high output power, and the exposed pad needs thermal coupling to the enclosure or internal heat spreader.
Recommended
Recommended Products Summary
Engineering reference data for TAS5142DKD — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TAS5142DKDG4 |
|---|---|---|
| Brand | Texas Instruments | Texas Instruments |
| Package | 36-pin HSSOP with exposed thermal pad | 36-pin HSSOP with exposed thermal pad |
| Stereo Output Power | 100 W | 100 W |
| Mono Output Power | 200 W | 200 W |
| Power Supply Range | 0 V to 34 V | 0 V to 34 V |
| Analog Supply Range | 10.8 V to 13.2 V | 10.8 V to 13.2 V |
| Input Type | PWM | PWM |
| Speaker Load | 4 ohm bridge-titled load | 4 ohm bridge-titled load |
| Channel Count | 2 channels | 2 channels |
| Protection | Improved integrated protection system | Improved integrated protection system |
Key Differentiators
- High-power stereo capability in a 36-pin HSSOP power stage (vs TAS5142DDVR)
- Integrated high-power protection for speaker interfaces (vs TAS5142DKDG4)
- Documented 4 ohm bridge-tied-load operation (vs TAS5142DKDG4)
Design Notes
Treat the exposed thermal pad as a required thermal structure rather than an optional ground connection. Follow the Texas Instruments land pattern, exposed-pad dimensions, solder-process limits, and copper-area recommendation. At maximum stereo output, heat generation is greatest, so use a continuous copper heat spreader where board area permits and verify junction temperature in the final enclosure.
Use the manufacturer application circuit as the basis for output filtering and placement. Keep the switching-output path from the device through the inductors to the speaker connector short and wide. Place the associated capacitors close to their intended pins, maintain the recommended return-current path, and avoid routing high-current outputs beneath sensitive audio input or control circuitry.
Size the analog and power rails for the intended 4 ohm load, output level, and channel configuration. The device accepts a 10.8 V to 13.2 V analog supply, while its overall supply range extends from 0 V to 34 V. Check rail tolerance, startup behavior, and transient response against the manufacturer limits rather than treating the nominal output rating as independent of supply capability.
Do not substitute a different-package family member without redesigning the PCB. The TAS5142DDVR uses a smaller leadless package and is not a drop-in replacement for the 36-pin HSSOP TAS5142DKD. Also avoid treating PWM inputs as conventional analog inputs: upstream signal generation, filtering, grounding, and output-network values must follow the manufacturer reference design.
Compliance Information
AEC-Q100 is not applicable to this general-purpose audio amplifier. RoHS, REACH, lead-free, halogen-free, and conflict-minerals declarations are not stated in the product records used for this page.
